chore: bump version to 7.1.3. (#1414)

Co-authored-by: Lothar Droppelmann <lothar.droppelmann@gmail.com>

.github/ISSUE_TEMPLATE/bug.md

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+---
+name: "Bug Report"
+about: "NERDTree is misbehaving? Tell us about it."
+labels: bug
+---
+<!-- Attention! Please Read!
+
+Please fill out ALL the information below so that the issue can be fully understood. Omitting
+information will delay the resolution of your issue. It will be labeled "Needs More Info", and
+may be closed until there is enough information.
+
+Keep in mind that others may have the same question in the future. The better your information,
+the more likely they'll be able to help themselves.
+-->
+
+#### Self-Diagnosis
+Before creating an issue, take some time to search these resources for an answer. It's possible that someone else has already seen and solved your issue.
+- [old NERDTree issues](https://github.com/preservim/nerdtree/issues?q=is%3Aissue)
+- NERDTree documentation - `:h NERDTree`
+- [NERDTree Wiki](https://github.com/preservim/nerdtree/wiki)
+- Other resources: <https://stackoverflow.com>, <https://vi.stackexchange.com>, etc.
+
+#### Environment
+- Operating System: 
+- Vim/Neovim version `:version`: 
+- NERDTree version, found on first line of quickhelp `?`: 
+- Are you using any of these NERDTree-dependent plugins?  <!-- Check the boxes after creating the issue. -->
+    - [ ] [Xuyuanp/nerdtree-git-plugin](https://github.com/Xuyuanp/nerdtree-git-plugin)
+    - [ ] [ryanoasis/vim-devicons](https://github.com/ryanoasis/vim-devicons)
+    - [ ] [tiagofumo/vim-nerdtree-syntax-highlight](https://github.com/tiagofumo/vim-nerdtree-syntax-highlight)
+    - [ ] [scrooloose/nerdtree-project-plugin](https://github.com/scrooloose/nerdtree-project-plugin)
+    - [ ] [PhilRunninger/nerdtree-buffer-ops](https://github.com/PhilRunninger/nerdtree-buffer-ops)
+    - [ ] [PhilRunninger/nerdtree-visual-selection](https://github.com/PhilRunninger/nerdtree-visual-selection)
+    - [ ] [jistr/vim-nerdtree-tabs](https://github.com/jistr/vim-nerdtree-tabs)
+    - [ ] Others (specify):
+- Provide a minimal **.vimrc** file that will reproduce the issue.
+```vim
+```
+
+#### Steps to Reproduce the Issue
+1. 
+
+#### Current Behavior (Include screenshots where appropriate.)
+
+#### Expected Result
+

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: "Feature Request"
+about: "What new feature are you requesting for NERDTree?"
+labels: "feature request"
+---
+
+#### Description
+

.github/ISSUE_TEMPLATE/question.md

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+---
+name: "General Question"
+about: "Having trouble setting up NERDTree? Need clarification on a setting? Ask your question here."
+labels: "general question"
+---
+Before creating an issue, take some time to search these resources. It's possible that someone else has already asked your question and gotten an answer.
+- [old NERDTree issues](https://github.com/preservim/nerdtree/issues?q=is%3Aissue)
+- NERDTree documentation - `:h NERDTree`
+- [NERDTree Wiki](https://github.com/preservim/nerdtree/wiki)
+- Other resource: <https://stackoverflow.com>, <https://vi.stackexchange.com>, etc.
+
+#### State Your Question
+

.github/PULL_REQUEST_TEMPLATE.md

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+### Description of Changes
+Closes #    <!-- Enter the issue number this PR addresses. If none, remove this line. -->
+
+
+---
+### New Version Info
+

.github/workflows/vint.yml

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+name: Vint
+on: [push, pull_request]
+jobs:
+  vint:
+    strategy:
+      fail-fast: false
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v3
+    - name: Run vint with reviewdog
+      uses: reviewdog/action-vint@v1
+      with:
+        github_token: ${{ secrets.github_token }}
+        reporter: github-pr-review

.vintrc.yaml

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+cmdargs:
+  severity: style_problem
+  color: true
+  env:
+    neovim: false

CHANGELOG.md

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+# NERDTree Change Log
+<!-- Introduce a new MAJOR or MINOR version with a 4-hash header.
+     PATCH versions are listed from newest to oldest under their respective MAJOR.MINOR
+     version in an unordered list.  The format is:
+        - **.PATCH**: Pull Request Title (PR Author) [PR Number](Link to PR)
+            or
+        - **.PATCH**:
+            - Pull Request Title 1 (PR Author) [PR Number](Link to PR)
+            - Pull Request Title 2 (PR Author) [PR Number](Link to PR)
+                .
+                .
+                .
+            - Pull Request Title n (PR Author) [PR Number](Link to PR)
+-->
+#### 7.1
+- **.3**:
+    - docs: update FAQ snippets containing quit command. (rzvxa) [#1417](https://github.com/preservim/nerdtree/pull/1417)
+    - feat: jump to bookmark table shortcut. (ds2606, rzvxa) [#1394](https://github.com/preservim/nerdtree/pull/1394)
+    - fix: typo in docs for show file lines setting. (lothardp) [#1426](https://github.com/preservim/nerdtree/pull/1426)
+- **.2**:
+    - fix: GetWinNum regex pattern. (rzvxa) [#1409](https://github.com/preservim/nerdtree/pull/1409)
+    - fix: session restore for nerdtree buffers. (rzvxa) [#1405](https://github.com/preservim/nerdtree/pull/1405)
+- **.1**:
+    - fix: change default binding of filelines to `FL`. (rzvxa) [#1400](https://github.com/preservim/nerdtree/pull/1400)
+    - fix: toggle zoom resizing. (ds2606) [#1395](https://github.com/preservim/nerdtree/pull/1395)
+- **.0**:
+    - fix: typo in the docs. (bl4kraven) [#1390](https://github.com/preservim/nerdtree/pull/1390)
+    - feat: add NERDTreeExplore command. (msibal6) [#1389](https://github.com/preservim/nerdtree/pull/1389)
+    - fix: mapping description in NERDTree.txt. (roccomao) [#1393](https://github.com/preservim/nerdtree/pull/1393)
+#### 7.0
+- **.1**:
+    - Fix NERDTreeFind to handle directory case sensitivity. (dangibson) [#1387](https://github.com/preservim/nerdtree/pull/1387)
+    - New Show file lines toggle. (hsnks100) [#1384](https://github.com/preservim/nerdtree/pull/1384)
+    - Add case sensitivity for refreshing nodes. (rzvxa) [#1382](https://github.com/preservim/nerdtree/pull/1382)
+    - Clarified the NERDTreeChangePermissions prompt. (rzvxa) [#1381](https://github.com/preservim/nerdtree/pull/1381)
+    - New reveal functionality for Windows. (rzvxa) [#1366](https://github.com/preservim/nerdtree/pull/1366)
+    - Fix bracket escaping in path names. (kai-patel) [#1359](https://github.com/preservim/nerdtree/pull/1359)
+    - Fix Case Sensitive Move Operation. (rzvxa) [#1375](https://github.com/preservim/nerdtree/pull/1375)
+    - New menu command for changing selected node permissions. (mjkloeckner) [#1348](https://github.com/preservim/nerdtree/pull/1348)
+    - Fix documentation errors. (BubuDavid) [#1372](https://github.com/preservim/nerdtree/pull/1372)
+    - Fix typo in nerdtree.vim file. (SandeshPyakurel) [#1380](https://github.com/preservim/nerdtree/pull/1380)
+- **.0**:
+    - Now we warn about invalid files instead of ignoring them silently. (rmonico) [#1365](https://github.com/preservim/nerdtree/pull/1365)
+    - New g:NERDTreeWinPos options for top and bottom. (rzvxa) [#1363](https://github.com/preservim/nerdtree/pull/1363)
+    - Fix error in README. (nickspoons) [#1330](https://github.com/preservim/nerdtree/pull/1330)
+    - Fix typo in the documentation. (chapeupreto) [#1306](https://github.com/preservim/nerdtree/pull/1306)
+#### 6.10
+- **.16**: Fix documentation errors. (lifecrisis) [#1269](https://github.com/preservim/nerdtree/pull/1269)
+- **.15**: Ensure backward compatible testing of types. (lifecrisis) [#1266](https://github.com/preservim/nerdtree/pull/1266)
+- **.14**: Replace trim() with a version-compatible alternative. (PhilRunninger) [#1265](https://github.com/preservim/nerdtree/pull/1265)
+- **.13**: Change highlighting of bookmarks in the tree. (PhilRunninger) [#1261](https://github.com/preservim/nerdtree/pull/1261)
+- **.12**: Answer the question about accessing files over scp or ftp. (PhilRunninger) [#1259](https://github.com/preservim/nerdtree/pull/1259)
+- **.11**: Trim filenames created via the fs_menu (elanorigby) [#1243](https://github.com/preservim/nerdtree/pull/1243)
+- **.10**: Improve F.A.Q. Answers and Issue Templates (PhilRunninger) [#1249](https://github.com/preservim/nerdtree/pull/1249)
+- **.9**: `go` on a bookmark directory will NERDTreeFind it. (PhilRunninger) [#1236](https://github.com/preservim/nerdtree/pull/1236)
+- **.8**: Put `Callback` function variables in local scope. (PhilRunninger) [#1230](https://github.com/preservim/nerdtree/pull/1230)
+- **.7**: Fix mouse-clicking a file to open it. (PhilRunninger) [#1225](https://github.com/preservim/nerdtree/pull/1225)
+- **.6**: Restore the default behavior of the `<CR>` key. (PhilRunninger) [#1221](https://github.com/preservim/nerdtree/pull/1221)
+- **.5**: Fix `{'keepopen':0}` in NERDTreeCustomOpenArgs (PhilRunninger) [#1217](https://github.com/preservim/nerdtree/pull/1217)
+- **.4**: Removed directory separator from sort key (Daniel E) [#1219](https://github.com/preservim/nerdtree/pull/1219)
+- **.3**: Add new FAQ and answer: How to prevent buffers replacing NERDTree. (PhilRunninger) [#1215](https://github.com/preservim/nerdtree/pull/1215)
+- **.2**: New menu command: Run a system command in this directory. (PhilRunninger) [#1214](https://github.com/preservim/nerdtree/pull/1214)
+- **.1**: Escape quotation marks so they can be used in key mappings. (PhilRunninger) [#1213](https://github.com/preservim/nerdtree/pull/1213)
+- **.0**: Enable full path specifications for NERDTreeIgnore (PhilRunninger) [#1207](https://github.com/preservim/nerdtree/pull/1207)
+#### 6.9
+- **.12**: Respect NERDTreeCustomOpenArgs when opening bookmark (przepompownia) [#1200](https://github.com/preservim/nerdtree/pull/1200)
+- **.11**: Revamp the README. (buncis, PhilRunninger) [#1192](https://github.com/preservim/nerdtree/pull/1192), [#1193](https://github.com/preservim/nerdtree/pull/1193)
+- **.10**: Open a mirrored NERDTree with correct width (PhilRunninger) [#1177](https://github.com/preservim/nerdtree/pull/1177)
+- **.9**: Updated Readme, removed typo (H3RSKO) [#1167](https://github.com/preservim/nerdtree/pull/1167)
+- **.8**: Refactor sort comparison functions, removing redundancy (PhilRunninger) [#1166](https://github.com/preservim/nerdtree/pull/1166)
+- **.7**: Fix argument of `exists()` function calls checking for autocommands. (PhilRunninger) [#1165](https://github.com/preservim/nerdtree/pull/1165)
+- **.6**: Don't use silent when raising User events (PhilRunninger) [#1164](https://github.com/preservim/nerdtree/pull/1164)
+- **.5**: Fix highlight for file node.  (pirey) [#1157](https://github.com/preservim/nerdtree/pull/1157)
+- **.4**: Make sure symbolic links' flags are highlighted correctly.  (PhilRunninger) [#1156](https://github.com/preservim/nerdtree/pull/1156)
+- **.3**: Fix new NERDTrees' width when previous one was in the only window. (PhilRunninger) [#1153](https://github.com/preservim/nerdtree/pull/1153)
+- **.2**: Fix the scope of several key mappings (lifecrisis, PhilRunninger) [#1151](https://github.com/preservim/nerdtree/pull/1151)
+- **.1**: Respect user's `&shellslash` setting in CopyNode and RemoveNode functions (PhilRunninger) [#1150](https://github.com/preservim/nerdtree/pull/1150)
+- **.0**: Enable opening bookmarks in split windows. (PhilRunninger) [#1144](https://github.com/preservim/nerdtree/pull/1144)
+#### 6.8
+- **.0**: Allow concealed characters to show another character. (PhilRunninger) [#1138](https://github.com/preservim/nerdtree/pull/1138)
+#### 6.7
+- **.15**: Add curly braces to the list of characters to be escaped. (PhilRunninger) [#1128](https://github.com/preservim/nerdtree/pull/1128)
+- **.14**: Use backward-compatible `nerdtree#and()` in one place that was missed. (PhilRunninger) [#1134](https://github.com/preservim/nerdtree/pull/1134)
+- **.13**: `cmd.exe /c start "" <filename>` for windows default viewer support. (J. Altayó) [#1130](https://github.com/preservim/nerdtree/pull/1130)
+- **.12**: Fixed a bug that caused the file-tree construction to slow down significantly. (Eugenij-W) [#1126](https://github.com/preservim/nerdtree/pull/1126)
+- **.11**: Fix exception in NERDTreeFind (on windows OS and If the file is located in the root directory of the disk) (Eugenij-W) [#1122](https://github.com/preservim/nerdtree/pull/1122)
+- **.10**: Do not consider the tree root to be "cascadable". (lifecrisis) [#1120](https://github.com/preservim/nerdtree/pull/1120)
+- **.9**: Force `:NERDTreeFocus` to allow events to be fired when switching windows. (PhilRunninger) [#1118](https://github.com/preservim/nerdtree/pull/1118)
+- **.8**: Fix example code for the `NERDTreeAddKeyMap()` function. (PhilRunninger) [#1116](https://github.com/preservim/nerdtree/pull/1116)
+- **.7**: Put `'%'` argument in `bufname()` for backwards compatibility. (PhilRunninger) [#1105](https://github.com/preservim/nerdtree/pull/1105)
+- **.6**: If a file's already open in the window, don't edit it again. (PhilRunninger) [#1103](https://github.com/preservim/nerdtree/pull/1103)
+- **.5**: Prevent unneeded tree creation in `:NERDTreeToggle[VCS] <path>` (PhilRunninger) [#1101](https://github.com/preservim/nerdtree/pull/1101)
+- **.4**: Add missing calls to the `shellescape()` function (lifecrisis) [#1099](https://github.com/preservim/nerdtree/pull/1099)
+- **.3**: Fix vsplit to not open empty buffers when opening previously closed file (AwkwardKore) [#1098](https://github.com/preservim/nerdtree/pull/1098)
+- **.2**: Fix infinity loop (on winvim) in FindParentVCSRoot (Eugenij-W) [#1095](https://github.com/preservim/nerdtree/pull/1095)
+- **.1**: File Move: Escape existing directory name when looking for open files. (PhilRunninger) [#1094](https://github.com/preservim/nerdtree/pull/1094)
+- **.0**: Open the parent directory when revealing a non-existent file with :NERDTreeFind (bouk) [#1090](https://github.com/preservim/nerdtree/pull/1090)
+#### 6.6
+- **.1**: [add] How to install using dein.vim (kazukazuinaina) [#1087](https://github.com/preservim/nerdtree/pull/1087)
+- **.0**: Add the ability to turn off directory arrows (PhilRunninger) [#1085](https://github.com/preservim/nerdtree/pull/1085)
+#### 6.5
+- **.0**: `NERDTreeToggle <start-directory>` always sets NERDTree root. (PhilRunninger) [#1083](https://github.com/preservim/nerdtree/pull/1083)
+#### 6.4
+- **.6**: NERDTreeFind shows expected message if file doesn't exist e.g. with vim-startify (andys8). [#1081](https://github.com/preservim/nerdtree/pull/1081)
+- **.5**: Ensure events are (or aren't) being ignored correctly. (PhilRunninger) [#1080](https://github.com/preservim/nerdtree/pull/1080)
+- **.4**: Prevent overwriting existing files/dirs on node move. (PhilRunninger) [#1079](https://github.com/preservim/nerdtree/pull/1079)
+- **.3**: Fix regex that finds keyword for minimal menu. (PhilRunninger) [#1075](https://github.com/preservim/nerdtree/pull/1075)
+- **.2**: Lint vimscript, fix errors and warnings, add CI job to review PRs (Caleb Maclennan) [#1071](https://github.com/preservim/nerdtree/pull/1071)
+- **.1**: Ensure backward compatibility. v:t_func is not available before Vim 8.0 (Phil Runninger)
+- **.0**: Allow use of function references as callbacks (HiPhish) [#1067](https://github.com/preservim/nerdtree/pull/1067)
+#### 6.3
+- **.0**: Add new command that behaves like NERDTreeToggle but defaults to the root of a VCS repository. (willfindlay) [#1060](https://github.com/preservim/nerdtree/pull/1060)
+#### 6.2
+- **.1**: Menu option, 'copy path to clipboard' is aware of VIM clipboard option (jhzn) [#1056](https://github.com/preservim/nerdtree/pull/1056)
+- **.0**: Support tab-specific CWDs (PhilRunninger) [#1032](https://github.com/preservim/nerdtree/pull/1032)
+#### 6.1
+- **.4**: Add VIM built-in package management to read me file. (pesarkhobeee) [#1049](https://github.com/preservim/nerdtree/pull/1049)
+- **.3**: Save/Set screen state also on WinLeave and WinEnter. (PhilRunninger) [#1048](https://github.com/preservim/nerdtree/pull/1048)
+- **.2**: Wrap saveScreenState's statements in a try-catch block. (PhilRunninger) [#1047](https://github.com/preservim/nerdtree/pull/1047)
+- **.1**: Catch errors when trying to read CHANGELOG.md. (PhilRunninger) [#1045](https://github.com/preservim/nerdtree/pull/1045)
+- **.0**: If file path doesn't exist, :NERDTreeFind its parent directory instead. (PhilRunninger) [#1043](https://github.com/preservim/nerdtree/pull/1043)
+#### 6.0
+- **.1**: Reintroduce necessary variable mistakenly removed. (PhilRunninger) [#1040](https://github.com/preservim/nerdtree/pull/1040)
+- **.0**: Make the behavior of window splits consistent (dragonxlwang, PhilRunninger) [#1035](https://github.com/preservim/nerdtree/pull/1035)
+#### 5.3
+- **.3**: Fix (p)ath not displaying in the minimal menu (tuzz) [#1038](https://github.com/preservim/nerdtree/pull/1038)
+- **.2**: Enable events when closing NerdTree window. (PhilRunninger) [#1037](https://github.com/preservim/nerdtree/pull/1037)
+- **.1**: Fix the `e` key mapping to use netrw if desired (PhilRunninger) [#1031](https://github.com/preservim/nerdtree/pull/1031)
+- **.0**: Add file extension and size to sorting capabilities (PhilRunninger) [#1029](https://github.com/preservim/nerdtree/pull/1029)
+#### 5.2
+- **.9**: Suppress events for intermediate window/tab/buffer changes (PhilRunninger) [#1026](https://github.com/preservim/nerdtree/pull/1026)
+- **.8**: Revert [#1019](https://github.com/preservim/nerdtree/pull/1019) to fix nvim artifacts and flickering. (PhilRunninger) [#1021](https://github.com/preservim/nerdtree/pull/1021)
+- **.7**: Use :mode only in neovim. MacVim still needs to use :redraw! (PhilRunninger) [#1019](https://github.com/preservim/nerdtree/pull/1019)
+- **.6**: In CHANGELOG.md and PR template, make reference to PR a true HTML link. (PhilRunninger) [#1017](https://github.com/preservim/nerdtree/pull/1017)
+- **.5**: Use `:mode` instead of `:redraw!` when updating menu. (PhilRunninger) [#1016](https://github.com/preservim/nerdtree/pull/1016)
+- **.4**: When searching for root line num, stop at end of file. (PhilRunninger) [#1015](https://github.com/preservim/nerdtree/pull/1015)
+- **.3**: Fix `<CR>` key map on the bookmark (lkebin) [#1014](https://github.com/preservim/nerdtree/pull/1014)
+- **.2**: Make Enter work on the `.. ( up a dir )` line (PhilRunninger) [#1013](https://github.com/preservim/nerdtree/pull/1013)
+- **.1**: Fix nerdtree#version() on Windows. (PhilRunninger)
+- **.0**: Expand functionality of `<CR>` mapping. (PhilRunninger) [#1011](https://github.com/preservim/nerdtree/pull/1011)
+#### 5.1
+- **.3**: Remove @mentions from PR template and change log. They weren't working. (PhilRunninger) [#1009](https://github.com/preservim/nerdtree/pull/1009)
+- **.2**: Fix NERDTree opening with the wrong size. (PhilRunninger) [#1008](https://github.com/preservim/nerdtree/pull/1008)
+- **.1**: Update Changelog and create PR Template (PhilRunninger) [#1007](https://github.com/preservim/nerdtree/pull/1007)
+- **.0**: Too many changes for one patch...
+    - Refresh a dir_node if the file wasn't found in it, and look once more. (PhilRunninger) [#1005](https://github.com/preservim/nerdtree/pull/1005)
+    - Add a "copy path to clipboard" menu option (PhilRunninger) [#1002](https://github.com/preservim/nerdtree/pull/1002)
+    - Enable root refresh on "vim ." a different way than [#999](https://github.com/preservim/nerdtree/pull/999). (PhilRunninger) [#1001](https://github.com/preservim/nerdtree/pull/1001)
+    - Fix refreshroot (PhilRunninger) [#999](https://github.com/preservim/nerdtree/pull/999)
+    - Change version check to look for 703 not 730 (vhalis) [#994](https://github.com/preservim/nerdtree/pull/994)
+    - Change minimum vim (PhilRunninger) [#991](https://github.com/preservim/nerdtree/pull/991)
+    - Allow multi-character DirArrows (PhilRunninger) [#985](https://github.com/preservim/nerdtree/pull/985)
+    - Remove redraw! while still clearing last message empty string. (PhilRunninger) [#979](https://github.com/preservim/nerdtree/pull/979)
+    - fix `_initChildren` function value set to numChildrenCached error (terryding77) [#969](https://github.com/preservim/nerdtree/pull/969)
+    - On Windows, do a case-insensitive comparison of paths. (PhilRunninger) [#967](https://github.com/preservim/nerdtree/pull/967)
+    - Remove the **Please wait... DONE** messages. (PhilRunninger) [#966](https://github.com/preservim/nerdtree/pull/966)
+    - Smarter delimiter default (PhilRunninger) [#963](https://github.com/preservim/nerdtree/pull/963)
+    - Update directory .vimdc readme example (spencerdcarlson) [#961](https://github.com/preservim/nerdtree/pull/961)
+    - Preview bookmarks (PhilRunninger) [#956](https://github.com/preservim/nerdtree/pull/956)
+    - Add new value to NERDTreeQuitOnOpen to close bookmark table (PhilRunninger) [#955](https://github.com/preservim/nerdtree/pull/955)
+    - Add an :EditBookmarks command to edit the bookmarks file (PhilRunninger) [#954](https://github.com/preservim/nerdtree/pull/954)
+    - Before copying, turn off &shellslash. Restore after copy is finished. (PhilRunninger) [#952](https://github.com/preservim/nerdtree/pull/952)
+    - Set a maximum window size when zooming. (PhilRunninger) [#950](https://github.com/preservim/nerdtree/pull/950)
+    - Confirm the wipeout of a unsaved buffer whose file has been renamed. (PhilRunninger) [#949](https://github.com/preservim/nerdtree/pull/949)
+    - Escape a backslash so it can be used in a key mapping. (PhilRunninger) [#948](https://github.com/preservim/nerdtree/pull/948)
+    - Add a NERDTreeMinimalMenu feature (tuzz) [#938](https://github.com/preservim/nerdtree/pull/938)
+    - fixed root path error for windows (zcodes) [#935](https://github.com/preservim/nerdtree/pull/935)
+    - Restore getDirChildren for use in nerdtree-project-plugin. (PhilRunninger) [#929](https://github.com/preservim/nerdtree/pull/929)
+    - Document NERDTreeNodeDelimiter [#912](https://github.com/preservim/nerdtree/pull/912) (PhilRunninger) [#926](https://github.com/preservim/nerdtree/pull/926)
+    - Allow modification of menu keybindings (Leandros) [#923](https://github.com/preservim/nerdtree/pull/923)
+    - Add two more disqualifications for isCascadable(). (PhilRunninger) [#914](https://github.com/preservim/nerdtree/pull/914)
+    - Allow highlighting more than one flag. (kristijanhusak) [#908](https://github.com/preservim/nerdtree/pull/908)
+    - Support sorting files and directories by modification time. (PhilRunninger) [#901](https://github.com/preservim/nerdtree/pull/901)
+    - Parse . and .. from path string with trailing slash. (PhilRunninger) [#899](https://github.com/preservim/nerdtree/pull/899)
+    - Force sort to recalculate the cached sortKey. (PhilRunninger) [#898](https://github.com/preservim/nerdtree/pull/898)
+    - Add NERDTreeRefreshRoot command (wgfm) [#897](https://github.com/preservim/nerdtree/pull/897)
+    - Call Resolve on the file's path when calling :NERDTreeFind. (PhilRunninger) [#896](https://github.com/preservim/nerdtree/pull/896)
+    - Catch all errors, not just NERDTree errors. (PhilRunninger) [#894](https://github.com/preservim/nerdtree/pull/894)
+    - Fix typo in help file (lvoisin) [#892](https://github.com/preservim/nerdtree/pull/892)
+    - Make NERDTreeCreator set the `'nolist'` option (lifecrisis) [#889](https://github.com/preservim/nerdtree/pull/889)
+    - Refresh buffers after `m`, `m` operation on a folder (PhilRunninger) [#888](https://github.com/preservim/nerdtree/pull/888)
+    - Use a better arg for FINDSTR when using the m,l command in Windows. (PhilRunninger) [#887](https://github.com/preservim/nerdtree/pull/887)
+    - Fix the <C-J>/<C-K> motions, which currently fail with cascades (lifecrisis) [#886](https://github.com/preservim/nerdtree/pull/886)
+    - Function "s:UI.getLineNum()" doesn't always work on cascades. (lifecrisis) [#882](https://github.com/preservim/nerdtree/pull/882)
+    - NERDTreeCWD: reset CWD if changed by NERDTreeFocus (PhilRunninger) [#878](https://github.com/preservim/nerdtree/pull/878)
+    - Use <count>tabnext instead of <count>gt to allow users to remap gt. (PhilRunninger) [#877](https://github.com/preservim/nerdtree/pull/877)
+    - Do a case sensitive comparison of new/existing buffers. (PhilRunninger) [#875](https://github.com/preservim/nerdtree/pull/875)
+    - Fix opening sub-directories that have commas in their name. (PhilRunninger) [#873](https://github.com/preservim/nerdtree/pull/873)
+    - Add new command to open NERDTree in the root of a VCS repository. (PhilRunninger) [#872](https://github.com/preservim/nerdtree/pull/872)
+    - Make sure the path to the bookmarks file exists before writing it. (PhilRunninger) [#871](https://github.com/preservim/nerdtree/pull/871)
+    - Unzoom NERDTree when opening a file (PhilRunninger) [#870](https://github.com/preservim/nerdtree/pull/870)
+    - Support unusual characters in file and directory names (PhilRunninger) [#868](https://github.com/preservim/nerdtree/pull/868)
+    - Reword renamed-buffer prompt to be more clear (aflock) [#867](https://github.com/preservim/nerdtree/pull/867)
+    - Default to placing cursor on root when closing bookmark table (lifecrisis) [#866](https://github.com/preservim/nerdtree/pull/866)
+    - Fix issues with sorting of nodes (PhilRunninger) [#856](https://github.com/preservim/nerdtree/pull/856)
+    - Better OSX detection (bubba-h57) [#853](https://github.com/preservim/nerdtree/pull/853)
+    - Bugfix - ensure keymaps dictionary exists before using it (mnussbaum) [#852](https://github.com/preservim/nerdtree/pull/852)
+    - Decrease startup-time by avoiding linear-time iteration over key mappings (mnussbaum) [#851](https://github.com/preservim/nerdtree/pull/851)
+    - Add code to sort mappings in quickhelp (lifecrisis) [#849](https://github.com/preservim/nerdtree/pull/849)
+    - Use ":clearjumps" in new NERDTree windows (lifecrisis) [#844](https://github.com/preservim/nerdtree/pull/844)
+    - Like m-c did before, create parent directories if needed on m-m. (PhilRunninger) [#840](https://github.com/preservim/nerdtree/pull/840)
+    - BUGFIX: Repair a problem with the `'u'` mapping. (lifecrisis) [#838](https://github.com/preservim/nerdtree/pull/838)
+    - Make the NERDTree buffer writable when rendering it. (PhilRunninger) [#837](https://github.com/preservim/nerdtree/pull/837)
+    - Code cleanup: Remove unsupported bookmark table mappings (lifecrisis) [#835](https://github.com/preservim/nerdtree/pull/835)
+    - Replace strcharpart() with substitute() for backward compatibility (bravestarr) [#834](https://github.com/preservim/nerdtree/pull/834)
+    - Fixed error `unknown function strcharpart` for older versions of Vim (hav4ik) [#833](https://github.com/preservim/nerdtree/pull/833)
+    - Clear output when NERDTree menu is aborted (lifecrisis) [#832](https://github.com/preservim/nerdtree/pull/832)
+    - Display a path with multi-byte characters correctly when it is truncated (bravestarr) [#830](https://github.com/preservim/nerdtree/pull/830)
+    - Support revealing file and executing file with xdg-open for Linux (ngnmhieu) [#824](https://github.com/preservim/nerdtree/pull/824)
+    - If node isn't open, count children on disk before deleting. (PhilRunninger) [#822](https://github.com/preservim/nerdtree/pull/822)
+    - Add new variable g:NERDTreeRemoveFileCmd (kutsan) [#816](https://github.com/preservim/nerdtree/pull/816)
+    - Use a better check for existence of the NERDTree buffer. (PhilRunninger) [#814](https://github.com/preservim/nerdtree/pull/814)
+    - Fix focussing previous buffer when closing NERDTree (mrubli) [#801](https://github.com/preservim/nerdtree/pull/801)
+    - Update the docs for "NERDTreeStatusline" (lifecrisis) [#796](https://github.com/preservim/nerdtree/pull/796)
+    - BUGFIX: Unstable behavior in the "getPath()" method (lifecrisis) [#795](https://github.com/preservim/nerdtree/pull/795)
+    - Revert the bugfix from pull request [#785](https://github.com/preservim/nerdtree/pull/785) (lifecrisis) [#794](https://github.com/preservim/nerdtree/pull/794)
+    - BUGFIX: Allow ":NERDTreeFind" to discover hidden files (lifecrisis) [#786](https://github.com/preservim/nerdtree/pull/786)
+    - BUGFIX: Allow ":NERDTreeFind" to reveal new files (lifecrisis) [#785](https://github.com/preservim/nerdtree/pull/785)
+    - Add modelines (lifecrisis) [#782](https://github.com/preservim/nerdtree/pull/782)
+    - Change the type of completion used by NERDTreeFind (lifecrisis) [#781](https://github.com/preservim/nerdtree/pull/781)
+    - change NERDTreeFind with args (zhenyangze) [#778](https://github.com/preservim/nerdtree/pull/778)
+    - Style Choice: Using confirm() when deleting a bookmark (lifecrisis) [#777](https://github.com/preservim/nerdtree/pull/777)
+    - remove useless substitute when `file =~# "/$"` (skyblueee) [#773](https://github.com/preservim/nerdtree/pull/773)
+    - remove useless removeLeadingSpaces in _stripMarkup (skyblueee) [#772](https://github.com/preservim/nerdtree/pull/772)
+    - Make the "o" mapping consistent with "x" (lifecrisis) [#769](https://github.com/preservim/nerdtree/pull/769)
+    - Fix a problem with the "x" handler (lifecrisis) [#768](https://github.com/preservim/nerdtree/pull/768)
+    - Clean up the handler for the "x" mapping (lifecrisis) [#767](https://github.com/preservim/nerdtree/pull/767)
+    - Revert change to tab opening method (lifecrisis) [#766](https://github.com/preservim/nerdtree/pull/766)
+    - BUGFIX: Add back support for "b:NERDTreeRoot" (lifecrisis) [#765](https://github.com/preservim/nerdtree/pull/765)
+    - Fix broken "t" and "T" mappings, tabs now open at end (lifecrisis) [#759](https://github.com/preservim/nerdtree/pull/759)
+    - Update doc with already existing mapping variables (asnr) [#699](https://github.com/preservim/nerdtree/pull/699)
+    - Fix the broken g:NERDTreeBookmarksSort setting (lifecrisis) [#696](https://github.com/preservim/nerdtree/pull/696)
+    - Correct NERDTreeIgnore pattern in doc (cntoplolicon) [#648](https://github.com/preservim/nerdtree/pull/648)
+    - Remove empty segments when splitting path (sooth-sayer) [#574](https://github.com/preservim/nerdtree/pull/574)
+    - Suppress autocmds less agressively (wincent) [#578](https://github.com/preservim/nerdtree/pull/578) [#691](https://github.com/preservim/nerdtree/pull/691)
+    - Add an Issues template to ask for more info initially.
+    - Fix markdown headers in readme (josephfrazier) [#676](https://github.com/preservim/nerdtree/pull/676)
+    - Don't touch `@o` and `@h` registers when rendering
+    - Fix bug with files and directories with dollar signs (alegen) [#649](https://github.com/preservim/nerdtree/pull/649)
+    - Reuse/reopen existing window trees where possible [#244](https://github.com/preservim/nerdtree/pull/244)
+    - Remove NERDTree.previousBuf()
+    - Change color of arrow (Leeiio) [#630](https://github.com/preservim/nerdtree/pull/630)
+    - Improved a tip in README.markdown (ggicci) [#628](https://github.com/preservim/nerdtree/pull/628)
+    - Shorten delete confimration of empty directory to `y` (mikeperri) [#530](https://github.com/preservim/nerdtree/pull/530)
+    - Fix API call to open directory tree in window (devm33) [#533](https://github.com/preservim/nerdtree/pull/533)
+    - Change default arrows on non-Windows platforms (gwilk) [#546](https://github.com/preservim/nerdtree/pull/546)
+    - Update to README - combine cd and git clone (zwhitchcox) [#584](https://github.com/preservim/nerdtree/pull/584)
+    - Update to README - Tip: start NERDTree when vim starts (therealplato) [#593](https://github.com/preservim/nerdtree/pull/593)
+    - Escape filename when moving an open buffer (zacharyvoase) [#595](https://github.com/preservim/nerdtree/pull/595)
+    - Fixed incorrect :helptags command in README (curran) [#619](https://github.com/preservim/nerdtree/pull/619)
+    - Fixed incomplete escaping of folder arrows (adityanatraj) [#548](https://github.com/preservim/nerdtree/pull/548)
+    - Added NERDTreeCascadeSingleChildDir option (juanibiapina) [#558](https://github.com/preservim/nerdtree/pull/558)
+    - Replace strchars() with backward compatible workaround.
+    - Add support for copy command in Windows (SkylerLipthay) [#231](https://github.com/preservim/nerdtree/pull/231)
+    - Fixed typo in README.markdown - :Helptags -> :helptags
+    - Rename "primary" and "secondary" trees to "tab" and "window" trees.
+    - Move a bunch of buffer level variables into the NERDTree and UI classes.
+    - Display cascading dirs on one line to save vertical/horizontal space (matt-gardner: brainstorming/testing)
+    - Remove the old style UI - Remove `NERDTreeDirArrows` option.
+    - On windows default to + and ~ for expand/collapse directory symbols.
+    - Lots more refactoring. Move a bunch of b: level vars into b:NERDTree and friends.
+
+#### 5.0.0
+- Refactor the code significantly:
+    * Break the classes out into their own files.
+    * Make the majority of the code OO - previously large parts were effectively a tangle of "global" methods.
+- Add an API to assign flags to nodes. This allows VCS plugins like https://github.com/Xuyuanp/nerdtree-git-plugin to exist. Thanks to **Xuyuanp** for helping design/test/build said API.
+- add `scope` argument to the key map API see :help NERDTreeAddKeyMap()
+- add magic [[dir]] and [[file]] flags to NERDTreeIgnore
+- add support for custom path filters. See :help NERDTreeAddPathFilter()
+- add path listener API. See :help NERDTreePathListenerAPI.
+- expand the fs menu functionality to list file properties (PhilRunninger, apbarrero, JESii)
+- make bookmarks work with `~` home shortcuts (hiberabyss)
+- show OSX specific fsmenu options in regular vim on mac (evindor)
+- make dir arrow icons configurable (PickRelated)
+- optimise node sorting performance when opening large dirs (vtsang)
+- make the root note render prettier by truncating it at a path slash (gcmt)
+- remove NERDChristmasTree option - its always christmas now
+- add "cascade" open and closing for dirs containing only another single dir. See :help NERDTreeCascadeOpenSingleChildDir (pendulm)
+- Many other fixes, doc updates and contributions from: **actionshrimp**, **agrussellknives**, **alvan**, **AndrewRadev**, **cperl82** (*many small fixes*), **devmanhinton**, **egalpin**, **franksort**, **gastropoda**, **handcraftedbits**, **kelaban**, **lucascaton**, **mixvin**, **pendulm**, **SchDen**, **shanesmith**, **staeff**, **stephenprater**, **toiffel**, **Twinside**, **WoLpH**, **xiaodili**, **zhangoose**
+
+#### 4.2.0
+- Add NERDTreeDirArrows option to make the UI use pretty arrow chars instead of the old +~| chars to define the tree structure (sickill)
+- shift the syntax highlighting out into its own syntax file (gnap)
+- add some mac specific options to the filesystem menu - for macvim only (andersonfreitas)
+- Add NERDTreeMinimalUI option to remove some non functional parts of the nerdtree ui (camthompson)
+- tweak the behaviour of :NERDTreeFind - see :help :NERDTreeFind for the new behaviour (benjamingeiger)
+- if no name is given to :Bookmark, make it default to the name of the target file/dir (minyoung)
+- use `file` completion when doing copying, create, and move operations (EvanDotPro)
+- lots of misc bug fixes from: **AndrewRadev**, **Bogdanov**, **camthompson**, **kml**, **mathias**, **paddyoloughlin**, **scottstvnsn**, **sdewald**, **Vitaly**, **wycats**, me RAWR!
+
+#### 4.1.0
+- features:
+    - NERDTreeFind to reveal the node for the current buffer in the tree, see `|NERDTreeFind|`. This effectively merges the FindInNERDTree plugin (by **Doug McInnes**) into the script.
+    - make NERDTreeQuitOnOpen apply to the t/T keymaps too. Thanks to **Stefan Ritter** and **Rémi Prévost**.
+    - truncate the root node if wider than the tree window. Thanks to **Victor Gonzalez**.
+
+- bugfixes:
+    - really fix window state restoring
+    - fix some win32 path escaping issues. Thanks to **Stephan Baumeister**, **Ricky**, **jfilip1024**, and **Chris Chambers**.
+
+#### 4.0.0
+- add a new programmable menu system (see `:help NERDTreeMenu`).
+- add new APIs to add menus/menu-items to the menu system as well as custom key mappings to the NERD tree buffer (see `:help NERDTreeAPI`).
+- removed the old API functions
+- added a mapping to maximize/restore the size of nerd tree window, thanks to Guillaume Duranceau for the patch. See :help NERDTree-A for details.
+- fix a bug where secondary nerd trees (netrw hijacked trees) and NERDTreeQuitOnOpen didnt play nicely, thanks to **Curtis Harvey**.
+- fix a bug where the script ignored directories whose name ended in a dot, thanks to **Aggelos Orfanakos** for the patch.
+- fix a bug when using the x mapping on the tree root, thanks to **Bryan Venteicher** for the patch.
+- fix a bug where the cursor position/window size of the nerd tree buffer wasnt being stored on closing the window, thanks to **Richard Hart**.
+- fix a bug where NERDTreeMirror would mirror the wrong tree
+
+#### 3.1.1
+- fix a bug where a non-listed no-name buffer was getting created every time the tree windows was created, thanks to **Derek Wyatt** and **owen1**
+- make `<CR>` behave the same as the `o` mapping
+- some helptag fixes in the doc, thanks **strull**.
+- fix a bug when using `:set nohidden` and opening a file where the previous buf was modified. Thanks **iElectric**.
+- other minor fixes
+
+#### 3.1.0
+- New features:
+    - add mappings to open files in a vsplit, see `:help NERDTree-s` and `:help NERDTree-gs`
+    - make the statusline for the nerd tree window default to something hopefully more useful. See `:help 'NERDTreeStatusline'`
+- Bugfixes:
+    - make the hijack netrw functionality work when vim is started with `vim <some dir>` (thanks to **Alf Mikula** for the patch).
+    - fix a bug where the CWD wasnt being changed for some operations even when NERDTreeChDirMode==2 (thanks to **Lucas S. Buchala**)
+    - add -bar to all the nerd tree :commands so they can chain with other :commands (thanks to **tpope**)
+    - fix bugs when ignorecase was set (thanks to **nach**)
+    - fix a bug with the relative path code (thanks to **nach**)
+    - fix a bug where doing a `:cd` would cause `:NERDTreeToggle` to fail (thanks **nach**)
+
+
+#### 3.0.1
+- Bugfixes:
+    - fix bugs with :NERDTreeToggle and :NERDTreeMirror when `'hidden'` was not set
+    - fix a bug where `:NERDTree <path>` would fail if `<path>` was relative and didnt start with a `./` or `../`  Thanks to **James Kanze**.
+    - make the `q` mapping work with secondary (`:e <dir>`  style) trees, thanks to **jamessan**
+    - fix a bunch of small bugs with secondary trees
+- More insane refactoring.
+
+#### 3.0.0
+- hijack netrw so that doing an `:edit <directory>`  will put a NERD tree in the window rather than a netrw browser. See :help 'NERDTreeHijackNetrw'
+- allow sharing of trees across tabs, see `:help :NERDTreeMirror`
+- remove "top" and "bottom" as valid settings for NERDTreeWinPos
+- change the `'<tab>'` mapping to `'i'`
+- change the `'H'` mapping to `'I'`
+- lots of refactoring

LICENCE

@@ -0,0 +1,13 @@
+           DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
+                   Version 2, December 2004
+
+Copyright (C) 2004 Sam Hocevar <sam@hocevar.net>
+
+Everyone is permitted to copy and distribute verbatim or modified
+copies of this license document, and changing it is allowed as long
+as the name is changed.
+
+           DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
+  TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+ 0. You just DO WHAT THE FUCK YOU WANT TO.

README.markdown

@@ -0,0 +1,261 @@
+# The NERDTree [![Vint](https://github.com/preservim/nerdtree/workflows/Vint/badge.svg)](https://github.com/preservim/nerdtree/actions?workflow=Vint)
+
+## Introduction
+
+The NERDTree is a file system explorer for the Vim editor. Using this plugin, users can visually browse complex directory hierarchies, quickly open files for reading or editing, and perform basic file system operations.
+
+![NERDTree Screenshot](https://github.com/preservim/nerdtree/raw/master/screenshot.png)
+
+## Installation
+
+Use your favorite plugin manager to install this plugin. [tpope/vim-pathogen](https://github.com/tpope/vim-pathogen), [VundleVim/Vundle.vim](https://github.com/VundleVim/Vundle.vim), [junegunn/vim-plug](https://github.com/junegunn/vim-plug), and [Shougo/dein.vim](https://github.com/Shougo/dein.vim) are some of the more popular ones. A lengthy discussion of these and other managers can be found on [vi.stackexchange.com](https://vi.stackexchange.com/questions/388/what-is-the-difference-between-the-vim-plugin-managers). Basic instructions are provided below, but please **be sure to read, understand, and follow all the safety rules that come with your ~~power tools~~ plugin manager.**
+
+If you have no favorite, or want to manage your plugins without 3rd-party dependencies, consider using Vim 8+ packages, as described in Greg Hurrell's excellent Youtube video: [Vim screencast #75: Plugin managers](https://www.youtube.com/watch?v=X2_R3uxDN6g).
+
+<details>
+<summary>Pathogen</summary>
+Pathogen is more of a runtime path manager than a plugin manager. You must clone the plugins' repositories yourself to a specific location, and Pathogen makes sure they are available in Vim.
+
+
+1. In the terminal,
+    ```bash
+    git clone https://github.com/preservim/nerdtree.git ~/.vim/bundle/nerdtree
+    ```
+1. In your `vimrc`,
+    ```vim
+    call pathogen#infect()
+    syntax on
+    filetype plugin indent on
+    ```
+1. Restart Vim, and run `:helptags ~/.vim/bundle/nerdtree/doc/` or `:Helptags`.
+</details>
+
+<details>
+  <summary>Vundle</summary>
+
+1. Install Vundle, according to its instructions.
+1. Add the following text to your `vimrc`.
+    ```vim
+    call vundle#begin()
+      Plugin 'preservim/nerdtree'
+    call vundle#end()
+    ```
+1. Restart Vim, and run the `:PluginInstall` statement to install your plugins.
+</details>
+
+<details>
+  <summary>Vim-Plug</summary>
+
+1. Install Vim-Plug, according to its instructions.
+1. Add the following text to your `vimrc`.
+```vim
+call plug#begin()
+  Plug 'preservim/nerdtree'
+call plug#end()
+```
+1. Restart Vim, and run the `:PlugInstall` statement to install your plugins.
+</details>
+
+<details>
+  <summary>Dein</summary>
+
+1. Install Dein, according to its instructions.
+1. Add the following text to your `vimrc`.
+    ```vim
+    call dein#begin()
+      call dein#add('preservim/nerdtree')
+    call dein#end()
+    ```
+1. Restart Vim, and run the `:call dein#install()` statement to install your plugins.
+</details>
+
+<details>
+<summary>Vim 8+ packages</summary>
+
+If you are using Vim version 8 or higher you can use its built-in package management; see `:help packages` for more information. Just run these commands in your terminal:
+
+```bash
+git clone https://github.com/preservim/nerdtree.git ~/.vim/pack/vendor/start/nerdtree
+vim -u NONE -c "helptags ~/.vim/pack/vendor/start/nerdtree/doc" -c q
+```
+</details>
+
+## Getting Started
+After installing NERDTree, the best way to learn it is to turn on the Quick Help. Open NERDTree with the `:NERDTree` command, and press `?` to turn on the Quick Help, which will show you all the mappings and commands available in the NERDTree. Of course, your most complete source of information is the documentation: `:help NERDTree`.
+
+## NERDTree Plugins
+NERDTree can be extended with custom mappings and functions using its built-in API. The details of this API are described in the included documentation. Several plugins have been written, and are available on Github for installation like any other plugin. The plugins in this list are maintained (or not) by their respective owners, and certain combinations may be incompatible.
+
+* [Xuyuanp/nerdtree-git-plugin](https://github.com/Xuyuanp/nerdtree-git-plugin): Shows Git status flags for files and folders in NERDTree.
+* [ryanoasis/vim-devicons](https://github.com/ryanoasis/vim-devicons): Adds filetype-specific icons to NERDTree files and folders,
+* [tiagofumo/vim-nerdtree-syntax-highlight](https://github.com/tiagofumo/vim-nerdtree-syntax-highlight): Adds syntax highlighting to NERDTree based on filetype.
+* [scrooloose/nerdtree-project-plugin](https://github.com/scrooloose/nerdtree-project-plugin): Saves and restores the state of the NERDTree between sessions.
+* [PhilRunninger/nerdtree-buffer-ops](https://github.com/PhilRunninger/nerdtree-buffer-ops): 1) Highlights open files in a different color. 2) Closes a buffer directly from NERDTree.
+* [PhilRunninger/nerdtree-visual-selection](https://github.com/PhilRunninger/nerdtree-visual-selection): Enables NERDTree to open, delete, move, or copy multiple Visually-selected files at once.
+
+If any others should be listed, mention them in an issue or pull request.
+
+
+## Frequently Asked Questions
+
+In the answers to these questions, you will see code blocks that you can put in your `vimrc` file.
+
+### How can I map a specific key or shortcut to open NERDTree?
+
+NERDTree doesn't create any shortcuts outside of the NERDTree window, so as not to overwrite any of your other shortcuts. Use the `nnoremap` command in your `vimrc`. You, of course, have many keys and NERDTree commands to choose from. Here are but a few examples.
+```vim
+nnoremap <leader>n :NERDTreeFocus<CR>
+nnoremap <C-n> :NERDTree<CR>
+nnoremap <C-t> :NERDTreeToggle<CR>
+nnoremap <C-f> :NERDTreeFind<CR>
+```
+
+### How do I open NERDTree automatically when Vim starts?
+Each code block below is slightly different, as described in the `" Comment lines`.
+
+```vim
+" Start NERDTree and leave the cursor in it.
+autocmd VimEnter * NERDTree
+```
+---
+```vim
+" Start NERDTree and put the cursor back in the other window.
+autocmd VimEnter * NERDTree | wincmd p
+```
+---
+```vim
+" Start NERDTree when Vim is started without file arguments.
+autocmd StdinReadPre * let s:std_in=1
+autocmd VimEnter * if argc() == 0 && !exists('s:std_in') | NERDTree | endif
+```
+---
+```vim
+" Start NERDTree. If a file is specified, move the cursor to its window.
+autocmd StdinReadPre * let s:std_in=1
+autocmd VimEnter * NERDTree | if argc() > 0 || exists("s:std_in") | wincmd p | endif
+```
+---
+```vim
+" Start NERDTree, unless a file or session is specified, eg. vim -S session_file.vim.
+autocmd StdinReadPre * let s:std_in=1
+autocmd VimEnter * if argc() == 0 && !exists('s:std_in') && v:this_session == '' | NERDTree | endif
+```
+---
+```vim
+" Start NERDTree when Vim starts with a directory argument.
+autocmd StdinReadPre * let s:std_in=1
+autocmd VimEnter * if argc() == 1 && isdirectory(argv()[0]) && !exists('s:std_in') |
+    \ execute 'NERDTree' argv()[0] | wincmd p | enew | execute 'cd '.argv()[0] | endif
+```
+
+### How can I close Vim or a tab automatically when NERDTree is the last window?
+
+Because of the changes in how Vim handles its `autocmd` and layout locking `quit` command is no longer available in Vim9 auto commands, Depending on which version you're running select one of these solutions.
+
+__NeoVim users should be able to choose either one of them!__
+
+#### Vim9
+
+```vim
+" Exit Vim if NERDTree is the only window remaining in the only tab.
+autocmd BufEnter * if tabpagenr('$') == 1 && winnr('$') == 1 && exists('b:NERDTree') && b:NERDTree.isTabTree() | call feedkeys(":quit\<CR>:\<BS>") | endif
+```
+---
+```vim
+" Close the tab if NERDTree is the only window remaining in it.
+autocmd BufEnter * if winnr('$') == 1 && exists('b:NERDTree') && b:NERDTree.isTabTree() | call feedkeys(":quit\<CR>:\<BS>") | endif
+```
+
+#### Vim8 or older
+
+```vim
+" Exit Vim if NERDTree is the only window remaining in the only tab.
+autocmd BufEnter * if tabpagenr('$') == 1 && winnr('$') == 1 && exists('b:NERDTree') && b:NERDTree.isTabTree() | quit | endif
+```
+---
+```vim
+" Close the tab if NERDTree is the only window remaining in it.
+autocmd BufEnter * if winnr('$') == 1 && exists('b:NERDTree') && b:NERDTree.isTabTree() | quit | endif
+```
+
+### How can I prevent other buffers replacing NERDTree in its window?
+
+```vim
+" If another buffer tries to replace NERDTree, put it in the other window, and bring back NERDTree.
+autocmd BufEnter * if winnr() == winnr('h') && bufname('#') =~ 'NERD_tree_\d\+' && bufname('%') !~ 'NERD_tree_\d\+' && winnr('$') > 1 |
+    \ let buf=bufnr() | buffer# | execute "normal! \<C-W>w" | execute 'buffer'.buf | endif
+```
+
+### Can I have the same NERDTree on every tab automatically?
+
+```vim
+" Open the existing NERDTree on each new tab.
+autocmd BufWinEnter * if &buftype != 'quickfix' && getcmdwintype() == '' | silent NERDTreeMirror | endif
+```
+or change your NERDTree-launching shortcut key like so:
+```vim
+" Mirror the NERDTree before showing it. This makes it the same on all tabs.
+nnoremap <C-n> :NERDTreeMirror<CR>:NERDTreeFocus<CR>
+```
+
+### How can I change the default arrows?
+
+```vim
+let g:NERDTreeDirArrowExpandable = '?'
+let g:NERDTreeDirArrowCollapsible = '?'
+```
+The preceding values are the non-Windows default arrow symbols. Setting these variables to empty strings will remove the arrows completely and shift the entire tree two character positions to the left. See `:h NERDTreeDirArrowExpandable` for more details.
+
+### How can I show lines of files?
+
+```vim
+let g:NERDTreeFileLines = 1
+```
+
+Lines in the file are displayed as shown below.
+```
+</pack/packer/start/nerdtree/
+▸ autoload/
+▸ doc/
+▸ lib/
+▸ nerdtree_plugin/
+▸ plugin/
+▸ syntax/
+  _config.yml (1)
+  CHANGELOG.md (307)
+  LICENCE (13)
+  README.markdown (234)
+  screenshot.png (219)
+```
+
+### Can NERDTree access remote files via scp or ftp?
+
+Short answer: No, and there are no plans to add that functionality. However, Vim ships with a plugin that does just that. It's called netrw, and by adding the following lines to your `.vimrc`, you can use it to open files over the `scp:`, `ftp:`, or other protocols, while still using NERDTree for all local files. The function seamlessly makes the decision to open NERDTree or netrw, and other supported protocols can be added to the regular expression.
+
+```vim
+" Function to open the file or NERDTree or netrw.
+"   Returns: 1 if either file explorer was opened; otherwise, 0.
+function! s:OpenFileOrExplorer(...)
+    if a:0 == 0 || a:1 == ''
+        NERDTree
+    elseif filereadable(a:1)
+        execute 'edit '.a:1
+        return 0
+    elseif a:1 =~? '^\(scp\|ftp\)://' " Add other protocols as needed.
+        execute 'Vexplore '.a:1
+    elseif isdirectory(a:1)
+        execute 'NERDTree '.a:1
+    endif
+    return 1
+endfunction
+
+" Auto commands to handle OS commandline arguments
+autocmd StdinReadPre * let s:std_in=1
+autocmd VimEnter * if argc()==1 && !exists('s:std_in') | if <SID>OpenFileOrExplorer(argv()[0]) | wincmd p | enew | wincmd p | endif | endif
+
+" Command to call the OpenFileOrExplorer function.
+command! -n=? -complete=file -bar Edit :call <SID>OpenFileOrExplorer('<args>')
+
+" Command-mode abbreviation to replace the :edit Vim command.
+cnoreabbrev e Edit
+```

Rakefile

@@ -1,18 +0,0 @@
-desc "Copy the vim/doc files into ~/.vim"
-task :deploy_local do
-  run "cp plugin/NERD_tree.vim ~/.vim/plugin"
-  run "cp doc/NERD_tree.txt ~/.vim/doc"
-end
-
-
-desc "Create a zip archive for release to vim.org"
-task :zip do
-  abort "NERD_tree.zip already exists, aborting" if File.exist?("NERD_tree.zip")
-  run "zip NERD_tree.zip plugin/NERD_tree.vim doc/NERD_tree.txt"
-end
-
-def run(cmd)
-  puts "Executing: #{cmd}"
-  system cmd
-end
-

_config.yml

@@ -0,0 +1 @@
+theme: jekyll-theme-cayman

autoload/nerdtree.vim

@@ -0,0 +1,315 @@
+if exists('g:loaded_nerdtree_autoload')
+    finish
+endif
+let g:loaded_nerdtree_autoload = 1
+
+let s:rootNERDTreePath = resolve(expand('<sfile>:p:h:h'))
+
+"FUNCTION: nerdtree#version(...) {{{1
+"  If any value is given as an argument, the entire line of text from the
+"  change log is shown for the current version; otherwise, only the version
+"  number is shown.
+function! nerdtree#version(...) abort
+    let l:text = 'Unknown'
+    try
+        let l:changelog = readfile(join([s:rootNERDTreePath, 'CHANGELOG.md'], nerdtree#slash()))
+        let l:line = 0
+        while l:line <= len(l:changelog)
+            if l:changelog[l:line] =~# '\d\+\.\d\+'
+                let l:text = substitute(l:changelog[l:line], '.*\(\d\+.\d\+\).*', '\1', '')
+                let l:text .= substitute(l:changelog[l:line+1], '^.\{-}\(\.\d\+\).\{-}:\(.*\)', a:0>0 ? '\1:\2' : '\1', '')
+                break
+            endif
+            let l:line += 1
+        endwhile
+    catch
+    endtry
+    return l:text
+endfunction
+
+" SECTION: General Functions {{{1
+"============================================================
+
+" FUNCTION: nerdtree#closeTreeOnOpen() {{{2
+function! nerdtree#closeTreeOnOpen() abort
+    return g:NERDTreeQuitOnOpen == 1 || g:NERDTreeQuitOnOpen == 3
+endfunction
+
+" FUNCTION: nerdtree#closeBookmarksOnOpen() {{{2
+function! nerdtree#closeBookmarksOnOpen() abort
+    return g:NERDTreeQuitOnOpen == 2 || g:NERDTreeQuitOnOpen == 3
+endfunction
+
+" FUNCTION: nerdtree#slash() {{{2
+" Return the path separator used by the underlying file system.  Special
+" consideration is taken for the use of the 'shellslash' option on Windows
+" systems.
+function! nerdtree#slash() abort
+    if nerdtree#runningWindows()
+        if exists('+shellslash') && &shellslash
+            return '/'
+        endif
+
+        return '\'
+    endif
+
+    return '/'
+endfunction
+
+"FUNCTION: nerdtree#checkForBrowse(dir) {{{2
+"inits a window tree in the current buffer if appropriate
+function! nerdtree#checkForBrowse(dir) abort
+    if !isdirectory(a:dir)
+        return
+    endif
+
+    if s:reuseWin(a:dir)
+        return
+    endif
+
+    call g:NERDTreeCreator.CreateWindowTree(a:dir)
+endfunction
+
+"FUNCTION: s:reuseWin(dir) {{{2
+"finds a NERDTree buffer with root of dir, and opens it.
+function! s:reuseWin(dir) abort
+    let path = g:NERDTreePath.New(fnamemodify(a:dir, ':p'))
+
+    for i in range(1, bufnr('$'))
+        unlet! nt
+        let nt = getbufvar(i, 'NERDTree')
+        if empty(nt)
+            continue
+        endif
+
+        if nt.isWinTree() && nt.root.path.equals(path)
+            call nt.setPreviousBuf(bufnr('#'))
+            exec 'buffer ' . i
+            return 1
+        endif
+    endfor
+
+    return 0
+endfunction
+
+" FUNCTION: nerdtree#completeBookmarks(A,L,P) {{{2
+" completion function for the bookmark commands
+function! nerdtree#completeBookmarks(A,L,P) abort
+    return filter(g:NERDTreeBookmark.BookmarkNames(), 'v:val =~# "^' . a:A . '"')
+endfunction
+
+"FUNCTION: nerdtree#compareNodes(n1, n2) {{{2
+function! nerdtree#compareNodes(n1, n2) abort
+    return nerdtree#compareNodePaths(a:n1.path, a:n2.path)
+endfunction
+
+"FUNCTION: nerdtree#compareNodePaths(p1, p2) {{{2
+function! nerdtree#compareNodePaths(p1, p2) abort
+    let sortKey1 = a:p1.getSortKey()
+    let sortKey2 = a:p2.getSortKey()
+    let i = 0
+    while i < min([len(sortKey1), len(sortKey2)])
+        " Compare chunks upto common length.
+        " If chunks have different type, the one which has
+        " integer type is the lesser.
+        if type(sortKey1[i]) == type(sortKey2[i])
+            if sortKey1[i] <# sortKey2[i]
+                return - 1
+            elseif sortKey1[i] ># sortKey2[i]
+                return 1
+            endif
+        elseif type(sortKey1[i]) == type(0)
+            return -1
+        elseif type(sortKey2[i]) == type(0)
+            return 1
+        endif
+        let i += 1
+    endwhile
+
+    " Keys are identical upto common length.
+    " The key which has smaller chunks is the lesser one.
+    if len(sortKey1) < len(sortKey2)
+        return -1
+    elseif len(sortKey1) > len(sortKey2)
+        return 1
+    else
+        return 0
+    endif
+endfunction
+
+" FUNCTION: nerdtree#deprecated(func, [msg]) {{{2
+" Issue a deprecation warning for a:func. If a second arg is given, use this
+" as the deprecation message
+function! nerdtree#deprecated(func, ...) abort
+    let msg = a:0 ? a:func . ' ' . a:1 : a:func . ' is deprecated'
+
+    if !exists('s:deprecationWarnings')
+        let s:deprecationWarnings = {}
+    endif
+    if !has_key(s:deprecationWarnings, a:func)
+        let s:deprecationWarnings[a:func] = 1
+        echomsg msg
+    endif
+endfunction
+
+" FUNCTION: nerdtree#exec(cmd, ignoreAll) {{{2
+" Same as :exec cmd but, if ignoreAll is TRUE, set eventignore=all for the duration
+function! nerdtree#exec(cmd, ignoreAll) abort
+    let old_ei = &eventignore
+    if a:ignoreAll
+        set eventignore=all
+    endif
+    try
+        exec a:cmd
+    finally
+        let &eventignore = old_ei
+    endtry
+endfunction
+
+" FUNCTION: nerdtree#has_opt(options, name) {{{2
+function! nerdtree#has_opt(options, name) abort
+    return has_key(a:options, a:name) && a:options[a:name] ==# 1
+endfunction
+
+" FUNCTION: nerdtree#loadClassFiles() {{{2
+function! nerdtree#loadClassFiles() abort
+    runtime lib/nerdtree/path.vim
+    runtime lib/nerdtree/menu_controller.vim
+    runtime lib/nerdtree/menu_item.vim
+    runtime lib/nerdtree/key_map.vim
+    runtime lib/nerdtree/bookmark.vim
+    runtime lib/nerdtree/tree_file_node.vim
+    runtime lib/nerdtree/tree_dir_node.vim
+    runtime lib/nerdtree/opener.vim
+    runtime lib/nerdtree/creator.vim
+    runtime lib/nerdtree/flag_set.vim
+    runtime lib/nerdtree/nerdtree.vim
+    runtime lib/nerdtree/ui.vim
+    runtime lib/nerdtree/event.vim
+    runtime lib/nerdtree/notifier.vim
+endfunction
+
+" FUNCTION: nerdtree#postSourceActions() {{{2
+function! nerdtree#postSourceActions() abort
+    call g:NERDTreeBookmark.CacheBookmarks(1)
+    call nerdtree#ui_glue#createDefaultBindings()
+
+    "load all nerdtree plugins
+    runtime! nerdtree_plugin/**/*.vim
+endfunction
+
+"FUNCTION: nerdtree#runningWindows() {{{2
+function! nerdtree#runningWindows() abort
+    return has('win16') || has('win32') || has('win64')
+endfunction
+
+"FUNCTION: nerdtree#runningCygwin() {{{2
+function! nerdtree#runningCygwin() abort
+    return has('win32unix')
+endfunction
+
+"FUNCTION: nerdtree#runningMac() {{{2
+function! nerdtree#runningMac() abort
+    return has('gui_mac') || has('gui_macvim') || has('mac') || has('osx')
+endfunction
+
+" FUNCTION: nerdtree#osDefaultCaseSensitiveFS() {{{2
+function! nerdtree#osDefaultCaseSensitiveFS() abort
+    return s:osDefaultCaseSensitiveFS
+endfunction
+
+" FUNCTION: nerdtree#caseSensitiveFS() {{{2
+function! nerdtree#caseSensitiveFS() abort
+    return g:NERDTreeCaseSensitiveFS == 1 ||
+                \((g:NERDTreeCaseSensitiveFS == 2 || g:NERDTreeCaseSensitiveFS == 3) &&
+                \nerdtree#osDefaultCaseSensitiveFS())
+endfunction
+
+"FUNCTION: nerdtree#pathEquals(lhs, rhs) {{{2
+function! nerdtree#pathEquals(lhs, rhs) abort
+    if nerdtree#caseSensitiveFS()
+        return a:lhs ==# a:rhs
+    else
+        return a:lhs ==? a:rhs
+    endif
+endfunction
+
+"FUNCTION: nerdtree#onBufLeave() {{{2
+" used for handling the nerdtree BufLeave/WinLeave events.
+function! nerdtree#onBufLeave() abort
+    " detect whether we are in the middle of sourcing a session.
+    " if it is a buffer from the sourced session we need to restore it.
+    if exists('g:SessionLoad') && !exists('b:NERDTree')
+        let bname = bufname('%')
+        " is the buffer for a tab tree?
+        if bname =~# '^' . g:NERDTreeCreator.BufNamePrefix() . 'tab_\d\+$'
+            " rename loaded buffer and mark it as trash to prevent this event
+            " getting fired again
+            exec 'file TRASH_' . bname
+            " delete the trash buffer
+            exec 'bwipeout!'
+            " rescue the tab tree at the current working directory
+            call g:NERDTreeCreator.CreateTabTree(getcwd())
+        " is the buffer for a window tree?
+        elseif bname =~# '^' . g:NERDTreeCreator.BufNamePrefix(). 'win_\d\+$'
+            " rescue the window tree at the current working directory
+            call g:NERDTreeCreator.CreateWindowTree(getcwd())
+        else " unknown buffer type
+            " rename buffer to mark it as broken.
+            exec 'file BROKEN_' . bname
+            call nerdtree#echoError('Failed to restore "' . bname . '" from session. Is this session created with an older version of NERDTree?')
+        endif
+    else
+        if g:NERDTree.IsOpen()
+            call b:NERDTree.ui.saveScreenState()
+        endif
+    endif
+endfunction
+
+" SECTION: View Functions {{{1
+"============================================================
+
+"FUNCTION: nerdtree#echo  {{{2
+"A wrapper for :echo. Appends 'NERDTree:' on the front of all messages
+"
+"Args:
+"msg: the message to echo
+function! nerdtree#echo(msg) abort
+    redraw
+    echomsg empty(a:msg) ? '' : ('NERDTree: ' . a:msg)
+endfunction
+
+"FUNCTION: nerdtree#echoError {{{2
+"Wrapper for nerdtree#echo, sets the message type to errormsg for this message
+"Args:
+"msg: the message to echo
+function! nerdtree#echoError(msg) abort
+    echohl errormsg
+    call nerdtree#echo(a:msg)
+    echohl normal
+endfunction
+
+"FUNCTION: nerdtree#echoWarning {{{2
+"Wrapper for nerdtree#echo, sets the message type to warningmsg for this message
+"Args:
+"msg: the message to echo
+function! nerdtree#echoWarning(msg) abort
+    echohl warningmsg
+    call nerdtree#echo(a:msg)
+    echohl normal
+endfunction
+
+"FUNCTION: nerdtree#renderView {{{2
+function! nerdtree#renderView() abort
+    call b:NERDTree.render()
+endfunction
+
+if nerdtree#runningWindows()
+    let s:osDefaultCaseSensitiveFS = 0
+elseif nerdtree#runningMac()
+    let s:osDefaultCaseSensitiveFS = 0
+else
+    let s:osDefaultCaseSensitiveFS = 1
+endif
+
+" vim: set sw=4 sts=4 et fdm=marker:

autoload/nerdtree/ui_glue.vim

@@ -0,0 +1,756 @@
+if exists('g:loaded_nerdtree_ui_glue_autoload')
+    finish
+endif
+let g:loaded_nerdtree_ui_glue_autoload = 1
+
+" FUNCTION: nerdtree#ui_glue#createDefaultBindings() {{{1
+function! nerdtree#ui_glue#createDefaultBindings() abort
+    let s = '<SNR>' . s:SID() . '_'
+
+    call NERDTreeAddKeyMap({ 'key': '<MiddleMouse>', 'scope': 'all', 'callback': s . 'handleMiddleMouse' })
+    call NERDTreeAddKeyMap({ 'key': '<LeftRelease>', 'scope': 'all', 'callback': s.'handleLeftClick' })
+    call NERDTreeAddKeyMap({ 'key': '<2-LeftMouse>', 'scope': 'DirNode', 'callback': s.'activateDirNode' })
+    call NERDTreeAddKeyMap({ 'key': '<2-LeftMouse>', 'scope': 'FileNode', 'callback': s.'activateFileNode' })
+    call NERDTreeAddKeyMap({ 'key': '<2-LeftMouse>', 'scope': 'Bookmark', 'callback': s.'activateBookmark' })
+    call NERDTreeAddKeyMap({ 'key': '<2-LeftMouse>', 'scope': 'all', 'callback': s.'activateAll' })
+
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapCustomOpen, 'scope':'FileNode', 'callback': s.'customOpenFile'})
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapCustomOpen, 'scope':'DirNode', 'callback': s.'customOpenDir'})
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapCustomOpen, 'scope':'Bookmark', 'callback': s.'customOpenBookmark'})
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapCustomOpen, 'scope':'all', 'callback': s.'activateAll' })
+
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapActivateNode, 'scope': 'DirNode', 'callback': s.'activateDirNode' })
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapActivateNode, 'scope': 'FileNode', 'callback': s.'activateFileNode' })
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapActivateNode, 'scope': 'Bookmark', 'callback': s.'activateBookmark' })
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapPreview, 'scope': 'Bookmark', 'callback': s.'previewBookmark' })
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapActivateNode, 'scope': 'all', 'callback': s.'activateAll' })
+
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapOpenSplit, 'scope': 'FileNode', 'callback': s.'openHSplit' })
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapOpenSplit, 'scope': 'Bookmark', 'callback': s.'openHSplitBookmark' })
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapOpenVSplit, 'scope': 'FileNode', 'callback': s.'openVSplit' })
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapOpenVSplit, 'scope': 'Bookmark', 'callback': s.'openVSplitBookmark' })
+
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapPreview, 'scope': 'FileNode', 'callback': s.'previewNodeCurrent' })
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapPreviewSplit, 'scope': 'FileNode', 'callback': s.'previewNodeHSplit' })
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapPreviewSplit, 'scope': 'Bookmark', 'callback': s.'previewNodeHSplitBookmark' })
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapPreviewVSplit, 'scope': 'FileNode', 'callback': s.'previewNodeVSplit' })
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapPreviewVSplit, 'scope': 'Bookmark', 'callback': s.'previewNodeVSplitBookmark' })
+
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapOpenRecursively, 'scope': 'DirNode', 'callback': s.'openNodeRecursively' })
+
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapUpdir, 'scope': 'all', 'callback': s . 'upDirCurrentRootClosed' })
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapUpdirKeepOpen, 'scope': 'all', 'callback': s . 'upDirCurrentRootOpen' })
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapChangeRoot, 'scope': 'Node', 'callback': s . 'chRoot' })
+
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapChdir, 'scope': 'Node', 'callback': s.'chCwd' })
+
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapQuit, 'scope': 'all', 'callback': s.'closeTreeWindow' })
+
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapCWD, 'scope': 'all', 'callback': 'nerdtree#ui_glue#chRootCwd' })
+
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapRefreshRoot, 'scope': 'all', 'callback': s.'refreshRoot' })
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapRefresh, 'scope': 'Node', 'callback': s.'refreshCurrent' })
+
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapHelp, 'scope': 'all', 'callback': s.'displayHelp' })
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapToggleZoom, 'scope': 'all', 'callback': s.'toggleZoom' })
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapToggleHidden, 'scope': 'all', 'callback': s.'toggleShowHidden' })
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapToggleFilters, 'scope': 'all', 'callback': s.'toggleIgnoreFilter' })
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapToggleFiles, 'scope': 'all', 'callback': s.'toggleShowFiles' })
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapToggleBookmarks, 'scope': 'all', 'callback': s.'toggleShowBookmarks' })
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapToggleFileLines, 'scope': 'all', 'callback': s.'toggleShowFileLines' })
+
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapCloseDir, 'scope': 'Node', 'callback': s.'closeCurrentDir' })
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapCloseChildren, 'scope': 'DirNode', 'callback': s.'closeChildren' })
+
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapMenu, 'scope': 'Node', 'callback': s.'showMenu' })
+
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapJumpParent, 'scope': 'Node', 'callback': s.'jumpToParent' })
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapJumpFirstChild, 'scope': 'Node', 'callback': s.'jumpToFirstChild' })
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapJumpLastChild, 'scope': 'Node', 'callback': s.'jumpToLastChild' })
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapJumpRoot, 'scope': 'all', 'callback': s.'jumpToRoot' })
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapJumpNextSibling, 'scope': 'Node', 'callback': s.'jumpToNextSibling' })
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapJumpPrevSibling, 'scope': 'Node', 'callback': s.'jumpToPrevSibling' })
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapJumpBookmarks, 'scope': 'all', 'callback': s.'jumpToBookmarks' })
+
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapOpenInTab, 'scope': 'Node', 'callback': s . 'openInNewTab' })
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapOpenInTabSilent, 'scope': 'Node', 'callback': s . 'openInNewTabSilent' })
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapOpenInTab, 'scope': 'Bookmark', 'callback': s . 'openInNewTab' })
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapOpenInTabSilent, 'scope': 'Bookmark', 'callback': s . 'openInNewTabSilent' })
+
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapOpenExpl, 'scope': 'DirNode', 'callback': s.'openExplorer' })
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapOpenExpl, 'scope': 'FileNode', 'callback': s.'openExplorer' })
+
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapDeleteBookmark, 'scope': 'Bookmark', 'callback': s.'deleteBookmark' })
+endfunction
+
+
+"SECTION: Interface bindings {{{1
+"============================================================
+
+"FUNCTION: s:customOpenFile() {{{1
+" Open file node with the 'custom' key, initially <CR>.
+function! s:customOpenFile(node) abort
+    call a:node.activate(s:initCustomOpenArgs().file)
+endfunction
+
+"FUNCTION: s:customOpenDir() {{{1
+" Open directory node with the 'custom' key, initially <CR>.
+function! s:customOpenDir(node) abort
+    call s:activateDirNode(a:node, s:initCustomOpenArgs().dir)
+endfunction
+
+"FUNCTION: s:customOpenBookmark() {{{1
+" Open bookmark node with the 'custom' key, initially <CR>.
+function! s:customOpenBookmark(node) abort
+    if a:node.path.isDirectory
+        call a:node.activate(b:NERDTree, s:initCustomOpenArgs().dir)
+    else
+        call a:node.activate(b:NERDTree, s:initCustomOpenArgs().file)
+    endif
+endfunction
+
+"FUNCTION: s:initCustomOpenArgs() {{{1
+function! s:initCustomOpenArgs() abort
+    let l:defaultOpenArgs = {'file': {'reuse': 'all', 'where': 'p', 'keepopen':!nerdtree#closeTreeOnOpen()}, 'dir': {}}
+    try
+        let g:NERDTreeCustomOpenArgs = get(g:, 'NERDTreeCustomOpenArgs', {})
+        call  extend(g:NERDTreeCustomOpenArgs, l:defaultOpenArgs, 'keep')
+    catch /^Vim(\a\+):E712:/
+        call nerdtree#echoWarning('g:NERDTreeCustomOpenArgs is not set properly. Using default value.')
+        let g:NERDTreeCustomOpenArgs = l:defaultOpenArgs
+    finally
+        return g:NERDTreeCustomOpenArgs
+    endtry
+endfunction
+
+"FUNCTION: s:activateAll() {{{1
+"handle the user activating the updir line
+function! s:activateAll() abort
+    if getline('.') ==# g:NERDTreeUI.UpDirLine()
+        return nerdtree#ui_glue#upDir(0)
+    endif
+endfunction
+
+" FUNCTION: s:activateDirNode(directoryNode, options) {{{1
+" Open a directory with optional options
+function! s:activateDirNode(directoryNode, ...) abort
+
+    if a:directoryNode.isRoot() && a:directoryNode.isOpen
+        call nerdtree#echo('cannot close tree root')
+        return
+    endif
+
+    call a:directoryNode.activate((a:0 > 0) ? a:1 : {})
+endfunction
+
+"FUNCTION: s:activateFileNode() {{{1
+"handle the user activating a tree node
+function! s:activateFileNode(node) abort
+    call a:node.activate({'reuse': 'all', 'where': 'p', 'keepopen': !nerdtree#closeTreeOnOpen()})
+endfunction
+
+"FUNCTION: s:activateBookmark(bookmark) {{{1
+"handle the user activating a bookmark
+function! s:activateBookmark(bm) abort
+    call a:bm.activate(b:NERDTree, !a:bm.path.isDirectory ? {'where': 'p', 'keepopen': !nerdtree#closeTreeOnOpen()} : {})
+endfunction
+
+" FUNCTION: nerdtree#ui_glue#bookmarkNode(name) {{{1
+" Associate the current node with the given name
+function! nerdtree#ui_glue#bookmarkNode(...) abort
+    let currentNode = g:NERDTreeFileNode.GetSelected()
+    if currentNode !=# {}
+        let name = a:1
+        if empty(name)
+            let name = currentNode.path.getLastPathComponent(0)
+        endif
+        try
+            call currentNode.bookmark(name)
+            call b:NERDTree.render()
+        catch /^NERDTree.IllegalBookmarkNameError/
+            call nerdtree#echo('bookmark names must not contain spaces')
+        endtry
+    else
+        call nerdtree#echo('select a node first')
+    endif
+endfunction
+
+" FUNCTION: s:chCwd(node) {{{1
+function! s:chCwd(node) abort
+    try
+        call a:node.path.changeToDir()
+    catch /^NERDTree.PathChangeError/
+        call nerdtree#echoWarning('could not change cwd')
+    endtry
+endfunction
+
+" FUNCTION: s:chRoot(node) {{{1
+" changes the current root to the selected one
+function! s:chRoot(node) abort
+    call b:NERDTree.changeRoot(a:node)
+endfunction
+
+" FUNCTION: s:nerdtree#ui_glue#chRootCwd() {{{1
+" Change the NERDTree root to match the current working directory.
+function! nerdtree#ui_glue#chRootCwd() abort
+    NERDTreeCWD
+endfunction
+
+" FUNCTION: nnerdtree#ui_glue#clearBookmarks(bookmarks) {{{1
+function! nerdtree#ui_glue#clearBookmarks(bookmarks) abort
+    if a:bookmarks ==# ''
+        let currentNode = g:NERDTreeFileNode.GetSelected()
+        if currentNode !=# {}
+            call currentNode.clearBookmarks()
+        endif
+    else
+        for name in split(a:bookmarks, ' ')
+            let bookmark = g:NERDTreeBookmark.BookmarkFor(name)
+            call bookmark.delete()
+        endfor
+    endif
+    call b:NERDTree.root.refresh()
+    call b:NERDTree.render()
+endfunction
+
+" FUNCTION: s:closeChildren(node) {{{1
+" closes all childnodes of the current node
+function! s:closeChildren(node) abort
+    call a:node.closeChildren()
+    call b:NERDTree.render()
+    call a:node.putCursorHere(0, 0)
+endfunction
+
+" FUNCTION: s:closeCurrentDir(node) {{{1
+" Close the parent directory of the current node.
+function! s:closeCurrentDir(node) abort
+
+    if a:node.isRoot()
+        call nerdtree#echo('cannot close parent of tree root')
+        return
+    endif
+
+    let l:parent = a:node.parent
+
+    while l:parent.isCascadable()
+        let l:parent = l:parent.parent
+    endwhile
+
+    if l:parent.isRoot()
+        call nerdtree#echo('cannot close tree root')
+        return
+    endif
+
+    call l:parent.close()
+    call b:NERDTree.render()
+    call l:parent.putCursorHere(0, 0)
+endfunction
+
+" FUNCTION: s:closeTreeWindow() {{{1
+" close the tree window
+function! s:closeTreeWindow() abort
+    if b:NERDTree.isWinTree() && b:NERDTree.previousBuf() !=# -1
+        exec 'buffer ' . b:NERDTree.previousBuf()
+    else
+        if winnr('$') > 1
+            call g:NERDTree.Close()
+        else
+            call nerdtree#echo('Cannot close last window')
+        endif
+    endif
+endfunction
+
+" FUNCTION: s:deleteBookmark(bookmark) {{{1
+" Prompt the user to confirm the deletion of the selected bookmark.
+function! s:deleteBookmark(bookmark) abort
+    let l:message = 'Delete the bookmark "' . a:bookmark.name
+                \ . '" from the bookmark list?'
+
+    let l:choices = "&Yes\n&No"
+
+    echo | redraw
+    let l:selection = confirm(l:message, l:choices, 1, 'Warning')
+
+    if l:selection !=# 1
+        call nerdtree#echo('bookmark not deleted')
+        return
+    endif
+
+    try
+        call a:bookmark.delete()
+        silent call b:NERDTree.root.refresh()
+        call b:NERDTree.render()
+        echo | redraw
+    catch /^NERDTree/
+        call nerdtree#echoWarning('could not remove bookmark')
+    endtry
+endfunction
+
+" FUNCTION: s:displayHelp() {{{1
+" toggles the help display
+function! s:displayHelp() abort
+    call b:NERDTree.ui.toggleHelp()
+    call b:NERDTree.render()
+    call b:NERDTree.ui.centerView()
+endfunction
+
+" FUNCTION: s:findAndRevealPath(pathStr) {{{1
+function! s:findAndRevealPath(pathStr) abort
+    let l:pathStr = !empty(a:pathStr) ? a:pathStr : expand('%:p')
+    let l:revealOpts = {}
+
+    if empty(l:pathStr)
+        call nerdtree#echoWarning('no file for the current buffer')
+        return
+    endif
+
+    if !filereadable(l:pathStr)
+        let l:pathStr = fnamemodify(l:pathStr, ':h')
+        let l:revealOpts['open'] = 1
+    endif
+
+    try
+        let l:pathStr = g:NERDTreePath.Resolve(l:pathStr)
+        let l:pathObj = g:NERDTreePath.New(l:pathStr)
+    catch /^NERDTree.InvalidArgumentsError/
+        call nerdtree#echoWarning('invalid path')
+        return
+    endtry
+
+    if !g:NERDTree.ExistsForTab()
+        try
+            let l:cwd = g:NERDTreePath.New(getcwd())
+        catch /^NERDTree.InvalidArgumentsError/
+            call nerdtree#echo('current directory does not exist.')
+            let l:cwd = l:pathObj.getParent()
+        endtry
+
+        if l:pathObj.isUnder(l:cwd)
+            call g:NERDTreeCreator.CreateTabTree(l:cwd.str())
+        else
+            call g:NERDTreeCreator.CreateTabTree(l:pathObj.getParent().str())
+        endif
+    else
+        NERDTreeFocus
+
+        if !l:pathObj.isUnder(b:NERDTree.root.path)
+            call s:chRoot(g:NERDTreeDirNode.New(l:pathObj.getParent(), b:NERDTree))
+        endif
+    endif
+
+    if l:pathObj.isHiddenUnder(b:NERDTree.root.path)
+        call b:NERDTree.ui.setShowHidden(1)
+    endif
+
+    let l:node = b:NERDTree.root.reveal(l:pathObj, l:revealOpts)
+    call b:NERDTree.render()
+    call l:node.putCursorHere(1, 0)
+endfunction
+
+"FUNCTION: s:handleLeftClick() {{{1
+"Checks if the click should open the current node
+function! s:handleLeftClick() abort
+    let currentNode = g:NERDTreeFileNode.GetSelected()
+    if currentNode !=# {}
+
+        "the dir arrows are multibyte chars, and vim's string functions only
+        "deal with single bytes - so split the line up with the hack below and
+        "take the line substring manually
+        let line = split(getline(line('.')), '\zs')
+        let startToCur = ''
+        for i in range(0,len(line)-1)
+            let startToCur .= line[i]
+        endfor
+
+        if currentNode.path.isDirectory
+            if startToCur =~# g:NERDTreeUI.MarkupReg() && startToCur =~# '[+~'.g:NERDTreeDirArrowExpandable.g:NERDTreeDirArrowCollapsible.'] \?$'
+                call currentNode.activate()
+                return
+            endif
+        endif
+
+        if (g:NERDTreeMouseMode ==# 2 && currentNode.path.isDirectory) || g:NERDTreeMouseMode ==# 3
+            let char = strpart(startToCur, strlen(startToCur)-1, 1)
+            if char !~# g:NERDTreeUI.MarkupReg()
+                if currentNode.path.isDirectory
+                    call currentNode.activate()
+                else
+                    call currentNode.activate({'reuse': 'all', 'where': 'p', 'keepopen':!nerdtree#closeTreeOnOpen()})
+                endif
+                return
+            endif
+        endif
+    endif
+endfunction
+
+" FUNCTION: s:handleMiddleMouse() {{{1
+function! s:handleMiddleMouse() abort
+
+    " A middle mouse click does not automatically position the cursor as one
+    " would expect. Forcing the execution of a regular left mouse click here
+    " fixes this problem.
+    execute "normal! \<LeftMouse>"
+
+    let l:currentNode = g:NERDTreeFileNode.GetSelected()
+    if empty(l:currentNode)
+        call nerdtree#echoError('use the pointer to select a node')
+        return
+    endif
+
+    if l:currentNode.path.isDirectory
+        call l:currentNode.openExplorer()
+    else
+        call l:currentNode.open({'where': 'h'})
+    endif
+endfunction
+
+" FUNCTION: nerdtree#ui_glue#invokeKeyMap(key) {{{1
+"this is needed since I cant figure out how to invoke dict functions from a
+"key map
+function! nerdtree#ui_glue#invokeKeyMap(key) abort
+    call g:NERDTreeKeyMap.Invoke(a:key)
+endfunction
+
+" FUNCTION: s:jumpToFirstChild(node) {{{1
+function! s:jumpToFirstChild(node) abort
+    call s:jumpToChild(a:node, 0)
+endfunction
+
+" FUNCTION: s:jumpToLastChild(node) {{{1
+function! s:jumpToLastChild(node) abort
+    call s:jumpToChild(a:node, 1)
+endfunction
+
+" FUNCTION: s:jumpToChild(node, last) {{{1
+" Jump to the first or last child node at the same file system level.
+"
+" Args:
+" node: the node on which the cursor currently sits
+" last: 1 (true) if jumping to last child, 0 (false) if jumping to first
+function! s:jumpToChild(node, last) abort
+    let l:node = a:node.path.isDirectory ? a:node.getCascadeRoot() : a:node
+
+    if l:node.isRoot()
+        return
+    endif
+
+    let l:parent = l:node.parent
+    let l:children = l:parent.getVisibleChildren()
+
+    let l:target = a:last ? l:children[len(l:children) - 1] : l:children[0]
+
+    call l:target.putCursorHere(1, 0)
+    call b:NERDTree.ui.centerView()
+endfunction
+
+" FUNCTION: s:jumpToParent(node) {{{1
+" Move the cursor to the parent of the specified node.  For a cascade, move to
+" the parent of the cascade's first node.  At the root node, do nothing.
+function! s:jumpToParent(node) abort
+    let l:node = a:node.path.isDirectory ? a:node.getCascadeRoot() : a:node
+
+    if l:node.isRoot()
+        return
+    endif
+
+    if empty(l:node.parent)
+        call nerdtree#echo('could not jump to parent node')
+        return
+    endif
+
+    call l:node.parent.putCursorHere(1, 0)
+    call b:NERDTree.ui.centerView()
+endfunction
+
+" FUNCTION: s:jumpToRoot() {{{1
+" moves the cursor to the root node
+function! s:jumpToRoot() abort
+    call b:NERDTree.root.putCursorHere(1, 0)
+    call b:NERDTree.ui.centerView()
+endfunction
+
+" FUNCTION: s:jumpToNextSibling(node) {{{1
+function! s:jumpToNextSibling(node) abort
+    call s:jumpToSibling(a:node, 1)
+endfunction
+
+" FUNCTION: s:jumpToPrevSibling(node) {{{1
+function! s:jumpToPrevSibling(node) abort
+    call s:jumpToSibling(a:node, 0)
+endfunction
+
+" FUNCTION: s:jumpToSibling(node, forward) {{{1
+" Move the cursor to the next or previous node at the same file system level.
+"
+" Args:
+" node: the node on which the cursor currently sits
+" forward: 0 to jump to previous sibling, 1 to jump to next sibling
+function! s:jumpToSibling(node, forward) abort
+    let l:node = a:node.path.isDirectory ? a:node.getCascadeRoot() : a:node
+    let l:sibling = l:node.findSibling(a:forward)
+
+    if empty(l:sibling)
+        return
+    endif
+
+    call l:sibling.putCursorHere(1, 0)
+    call b:NERDTree.ui.centerView()
+endfunction
+
+" FUNCTION: s:jumpToBookmarks() {{{1
+" moves the cursor to the bookmark table
+function! s:jumpToBookmarks() abort
+    try
+        if b:NERDTree.ui.getShowBookmarks()
+            call g:NERDTree.CursorToBookmarkTable()
+        else
+            call b:NERDTree.ui.setShowBookmarks(1)
+        endif
+    catch /^NERDTree/
+        call nerdtree#echoError('Failed to jump to the bookmark table')
+        return
+    endtry
+endfunction
+
+" FUNCTION: nerdtree#ui_glue#openBookmark(name) {{{1
+" Open the Bookmark that has the specified name. This function provides the
+" implementation for the :OpenBookmark command.
+function! nerdtree#ui_glue#openBookmark(name) abort
+    try
+        let l:bookmark = g:NERDTreeBookmark.BookmarkFor(a:name)
+    catch /^NERDTree.BookmarkNotFoundError/
+        call nerdtree#echoError('bookmark "' . a:name . '" not found')
+        return
+    endtry
+    if l:bookmark.path.isDirectory
+        call l:bookmark.open(b:NERDTree)
+        return
+    endif
+
+    call l:bookmark.open(b:NERDTree, s:initCustomOpenArgs().file)
+endfunction
+
+" FUNCTION: s:openHSplit(target) {{{1
+function! s:openHSplit(target) abort
+    call a:target.activate({'where': 'h', 'keepopen': !nerdtree#closeTreeOnOpen()})
+endfunction
+
+" FUNCTION: s:openVSplit(target) {{{1
+function! s:openVSplit(target) abort
+    call a:target.activate({'where': 'v', 'keepopen': !nerdtree#closeTreeOnOpen()})
+endfunction
+
+"FUNCTION: s:openHSplitBookmark(bookmark) {{{1
+"handle the user activating a bookmark
+function! s:openHSplitBookmark(bm) abort
+    call a:bm.activate(b:NERDTree, !a:bm.path.isDirectory ? {'where': 'h', 'keepopen': !nerdtree#closeTreeOnOpen()} : {})
+endfunction
+
+"FUNCTION: s:openVSplitBookmark(bookmark) {{{1
+"handle the user activating a bookmark
+function! s:openVSplitBookmark(bm) abort
+    call a:bm.activate(b:NERDTree, !a:bm.path.isDirectory ? {'where': 'v', 'keepopen': !nerdtree#closeTreeOnOpen()} : {})
+endfunction
+
+" FUNCTION: s:previewHSplitBookmark(bookmark) {{{1
+function! s:previewNodeHSplitBookmark(bookmark) abort
+    call a:bookmark.activate(b:NERDTree, !a:bookmark.path.isDirectory ? {'stay': 1, 'where': 'h', 'keepopen': 1} : {})
+endfunction
+
+" FUNCTION: s:previewVSplitBookmark(bookmark) {{{1
+function! s:previewNodeVSplitBookmark(bookmark) abort
+    call a:bookmark.activate(b:NERDTree, !a:bookmark.path.isDirectory ? {'stay': 1, 'where': 'v', 'keepopen': 1} : {})
+endfunction
+
+" FUNCTION: s:openExplorer(node) {{{1
+function! s:openExplorer(node) abort
+    call a:node.openExplorer()
+endfunction
+
+" FUNCTION: s:openInNewTab(target) {{{1
+function! s:openInNewTab(target) abort
+    let l:opener = g:NERDTreeOpener.New(a:target.path, {'where': 't', 'keepopen': !nerdtree#closeTreeOnOpen()})
+    call l:opener.open(a:target)
+endfunction
+
+" FUNCTION: s:openInNewTabSilent(target) {{{1
+function! s:openInNewTabSilent(target) abort
+    let l:opener = g:NERDTreeOpener.New(a:target.path, {'where': 't', 'keepopen': !nerdtree#closeTreeOnOpen(), 'stay': 1})
+    call l:opener.open(a:target)
+endfunction
+
+" FUNCTION: s:openNodeRecursively(node) {{{1
+function! s:openNodeRecursively(node) abort
+    call nerdtree#echo('Recursively opening node. Please wait...')
+    call a:node.openRecursively()
+    call b:NERDTree.render()
+    call nerdtree#echo('')
+endfunction
+
+" FUNCTION: s:previewBookmark(bookmark) {{{1
+function! s:previewBookmark(bookmark) abort
+    if a:bookmark.path.isDirectory
+        execute 'NERDTreeFind '.a:bookmark.path.str()
+    else
+        call a:bookmark.activate(b:NERDTree, {'stay': 1, 'where': 'p', 'keepopen': 1})
+    endif
+endfunction
+
+"FUNCTION: s:previewNodeCurrent(node) {{{1
+function! s:previewNodeCurrent(node) abort
+    call a:node.open({'stay': 1, 'where': 'p', 'keepopen': 1})
+endfunction
+
+"FUNCTION: s:previewNodeHSplit(node) {{{1
+function! s:previewNodeHSplit(node) abort
+    call a:node.open({'stay': 1, 'where': 'h', 'keepopen': 1})
+endfunction
+
+"FUNCTION: s:previewNodeVSplit(node) {{{1
+function! s:previewNodeVSplit(node) abort
+    call a:node.open({'stay': 1, 'where': 'v', 'keepopen': 1})
+endfunction
+
+" FUNCTION: nerdtree#ui_glue#revealBookmark(name) {{{1
+" put the cursor on the node associate with the given name
+function! nerdtree#ui_glue#revealBookmark(name) abort
+    try
+        let targetNode = g:NERDTreeBookmark.GetNodeForName(a:name, 0, b:NERDTree)
+        call targetNode.putCursorHere(0, 1)
+    catch /^NERDTree.BookmarkNotFoundError/
+        call nerdtree#echo('Bookmark isn''t cached under the current root')
+    endtry
+endfunction
+
+" FUNCTION: s:refreshRoot() {{{1
+" Reloads the current root. All nodes below this will be lost and the root dir
+" will be reloaded.
+function! s:refreshRoot() abort
+    if !g:NERDTree.IsOpen()
+        return
+    endif
+    call nerdtree#echo('Refreshing the root node. This could take a while...')
+
+    let l:curWin = winnr()
+    call nerdtree#exec(g:NERDTree.GetWinNum() . 'wincmd w', 1)
+    call b:NERDTree.root.refresh()
+    call b:NERDTree.render()
+    redraw
+    call nerdtree#exec(l:curWin . 'wincmd w', 1)
+    call nerdtree#echo('')
+endfunction
+
+" FUNCTION: s:refreshCurrent(node) {{{1
+" refreshes the root for the current node
+function! s:refreshCurrent(node) abort
+    let node = a:node
+    if !node.path.isDirectory
+        let node = node.parent
+    endif
+
+    call nerdtree#echo('Refreshing node. This could take a while...')
+    call node.refresh()
+    call b:NERDTree.render()
+    call nerdtree#echo('')
+endfunction
+
+" FUNCTION: nerdtree#ui_glue#setupCommands() {{{1
+function! nerdtree#ui_glue#setupCommands() abort
+    command! -n=? -complete=dir -bar NERDTree :call g:NERDTreeCreator.CreateTabTree('<args>')
+    command! -n=? -complete=dir -bar NERDTreeToggle :call g:NERDTreeCreator.ToggleTabTree('<args>')
+    command! -n=? -complete=dir -bar NERDTreeExplore :call g:NERDTreeCreator.CreateExploreTree('<args>')
+    command! -n=0 -bar NERDTreeClose :call g:NERDTree.Close()
+    command! -n=1 -complete=customlist,nerdtree#completeBookmarks -bar NERDTreeFromBookmark call g:NERDTreeCreator.CreateTabTree('<args>')
+    command! -n=0 -bar NERDTreeMirror call g:NERDTreeCreator.CreateMirror()
+    command! -n=? -complete=file -bar NERDTreeFind call s:findAndRevealPath('<args>')
+    command! -n=0 -bar NERDTreeRefreshRoot call s:refreshRoot()
+    command! -n=0 -bar NERDTreeFocus call NERDTreeFocus()
+    command! -n=0 -bar NERDTreeCWD call NERDTreeCWD()
+endfunction
+
+" Function: s:SID()   {{{1
+function! s:SID() abort
+    if !exists('s:sid')
+        let s:sid = matchstr(expand('<sfile>'), '<SNR>\zs\d\+\ze_SID$')
+    endif
+    return s:sid
+endfun
+
+" FUNCTION: s:showMenu(node) {{{1
+function! s:showMenu(node) abort
+    let mc = g:NERDTreeMenuController.New(g:NERDTreeMenuItem.AllEnabled())
+    call mc.showMenu()
+endfunction
+
+" FUNCTION: s:toggleIgnoreFilter() {{{1
+function! s:toggleIgnoreFilter() abort
+    call b:NERDTree.ui.toggleIgnoreFilter()
+endfunction
+
+" FUNCTION: s:toggleShowBookmarks() {{{1
+function! s:toggleShowBookmarks() abort
+    call b:NERDTree.ui.toggleShowBookmarks()
+endfunction
+
+" FUNCTION: s:toggleShowFiles() {{{1
+function! s:toggleShowFiles() abort
+    call b:NERDTree.ui.toggleShowFiles()
+endfunction
+
+" FUNCTION: s:toggleShowHidden() {{{1
+" toggles the display of hidden files
+function! s:toggleShowHidden() abort
+    call b:NERDTree.ui.toggleShowHidden()
+endfunction
+
+" FUNCTION: s:toggleShowFileLines() {{{1
+" toggles the display of hidden files
+function! s:toggleShowFileLines() abort
+    call b:NERDTree.ui.toggleShowFileLines()
+endfunction
+
+" FUNCTION: s:toggleZoom() {{{1
+function! s:toggleZoom() abort
+    call b:NERDTree.ui.toggleZoom()
+endfunction
+
+" FUNCTION: nerdtree#ui_glue#upDir(preserveState) {{{1
+" Move the NERDTree up one level.
+"
+" Args:
+" preserveState: if 1, the current root is left open when the new tree is
+" rendered; if 0, the current root node is closed
+function! nerdtree#ui_glue#upDir(preserveState) abort
+
+    try
+        call b:NERDTree.root.cacheParent()
+    catch /^NERDTree.CannotCacheParentError/
+        call nerdtree#echo('already at root directory')
+        return
+    endtry
+
+    let l:oldRoot = b:NERDTree.root
+    let l:newRoot = b:NERDTree.root.parent
+
+    call l:newRoot.open()
+    call l:newRoot.transplantChild(l:oldRoot)
+
+    if !a:preserveState
+        call l:oldRoot.close()
+    endif
+
+    call b:NERDTree.changeRoot(l:newRoot)
+    call l:oldRoot.putCursorHere(0, 0)
+endfunction
+
+" FUNCTION: s:upDirCurrentRootOpen() {{{1
+function! s:upDirCurrentRootOpen() abort
+    call nerdtree#ui_glue#upDir(1)
+endfunction
+
+" FUNCTION: s:upDirCurrentRootClosed() {{{1
+function! s:upDirCurrentRootClosed() abort
+    call nerdtree#ui_glue#upDir(0)
+endfunction
+
+" vim: set sw=4 sts=4 et fdm=marker:

lib/nerdtree/bookmark.vim

@@ -0,0 +1,365 @@
+" ============================================================================
+" CLASS: Bookmark
+"
+" The Bookmark class serves two purposes:
+"   (1) It is the top-level prototype for new, concrete Bookmark objects.
+"   (2) It provides an interface for client code to query and manipulate the
+"       global list of Bookmark objects within the current Vim session.
+" ============================================================================
+
+
+let s:Bookmark = {}
+let g:NERDTreeBookmark = s:Bookmark
+
+" FUNCTION: Bookmark.activate(nerdtree) {{{1
+function! s:Bookmark.activate(nerdtree, ...)
+    call self.open(a:nerdtree, a:0 ? a:1 : {})
+endfunction
+
+" FUNCTION: Bookmark.AddBookmark(name, path) {{{1
+" Class method to add a new bookmark to the list, if a previous bookmark exists
+" with the same name, just update the path for that bookmark
+function! s:Bookmark.AddBookmark(name, path)
+    for i in s:Bookmark.Bookmarks()
+        if i.name ==# a:name
+            let i.path = a:path
+            return
+        endif
+    endfor
+    call add(s:Bookmark.Bookmarks(), s:Bookmark.New(a:name, a:path))
+endfunction
+
+" FUNCTION: Bookmark.Bookmarks() {{{1
+" Class method to get all bookmarks. Lazily initializes the bookmarks global
+" variable
+function! s:Bookmark.Bookmarks()
+    if !exists('g:NERDTreeBookmarks')
+        let g:NERDTreeBookmarks = []
+    endif
+    return g:NERDTreeBookmarks
+endfunction
+
+" FUNCTION: Bookmark.BookmarkExistsFor(name) {{{1
+" class method that returns 1 if a bookmark with the given name is found, 0
+" otherwise
+function! s:Bookmark.BookmarkExistsFor(name)
+    try
+        call s:Bookmark.BookmarkFor(a:name)
+        return 1
+    catch /^NERDTree.BookmarkNotFoundError/
+        return 0
+    endtry
+endfunction
+
+" FUNCTION: Bookmark.BookmarkFor(name) {{{1
+" Class method that returns the Bookmark object having the specified name.
+" Throws NERDTree.BookmarkNotFoundError if no Bookmark is found.
+function! s:Bookmark.BookmarkFor(name)
+    let l:result = {}
+    for l:bookmark in s:Bookmark.Bookmarks()
+        if l:bookmark.name ==# a:name
+            let l:result = l:bookmark
+            break
+        endif
+    endfor
+    if empty(l:result)
+        throw 'NERDTree.BookmarkNotFoundError: "' . a:name  . '" not found'
+    endif
+    return l:result
+endfunction
+
+" FUNCTION: Bookmark.BookmarkNames() {{{1
+" Class method to return an array of all bookmark names
+function! s:Bookmark.BookmarkNames()
+    let names = []
+    for i in s:Bookmark.Bookmarks()
+        call add(names, i.name)
+    endfor
+    return names
+endfunction
+
+" FUNCTION: Bookmark.CacheBookmarks(silent) {{{1
+" Class method to read all bookmarks from the bookmarks file initialize
+" bookmark objects for each one.
+"
+" Args:
+" silent - dont echo an error msg if invalid bookmarks are found
+function! s:Bookmark.CacheBookmarks(silent)
+    if filereadable(g:NERDTreeBookmarksFile)
+        let g:NERDTreeBookmarks = []
+        let g:NERDTreeInvalidBookmarks = []
+        let bookmarkStrings = readfile(g:NERDTreeBookmarksFile)
+        let invalidBookmarksFound = 0
+        for i in bookmarkStrings
+
+            "ignore blank lines
+            if i !=# ''
+
+                let name = substitute(i, '^\(.\{-}\) .*$', '\1', '')
+                let path = substitute(i, '^.\{-} \(.*\)$', '\1', '')
+                let path = fnamemodify(path, ':p')
+
+                try
+                    let bookmark = s:Bookmark.New(name, g:NERDTreePath.New(path))
+                    call add(g:NERDTreeBookmarks, bookmark)
+                catch /^NERDTree.InvalidArgumentsError/
+                    call add(g:NERDTreeInvalidBookmarks, i)
+                    let invalidBookmarksFound += 1
+                endtry
+            endif
+        endfor
+        if invalidBookmarksFound
+            call s:Bookmark.Write()
+            if !a:silent
+                call nerdtree#echo(invalidBookmarksFound . ' invalid bookmarks were read. See :help NERDTreeInvalidBookmarks for info.')
+            endif
+        endif
+    endif
+endfunction
+
+" FUNCTION: Bookmark.CompareBookmarksByName(firstBookmark, secondBookmark) {{{1
+" Class method that indicates the relative position of two bookmarks when
+" placed in alphabetical order by name. Case-sensitivity is determined by an
+" option. Supports the s:Bookmark.SortBookmarksList() method.
+function! s:Bookmark.CompareBookmarksByName(firstBookmark, secondBookmark)
+    let l:result = 0
+    if g:NERDTreeBookmarksSort ==# 1
+        if a:firstBookmark.name <? a:secondBookmark.name
+            let l:result = -1
+        elseif a:firstBookmark.name >? a:secondBookmark.name
+            let l:result = 1
+        endif
+    elseif g:NERDTreeBookmarksSort ==# 2
+        if a:firstBookmark.name <# a:secondBookmark.name
+            let l:result = -1
+        elseif a:firstBookmark.name ># a:secondBookmark.name
+            let l:result = 1
+        endif
+    endif
+    return l:result
+endfunction
+
+" FUNCTION: Bookmark.ClearAll() {{{1
+" Class method to delete all bookmarks.
+function! s:Bookmark.ClearAll()
+    for i in s:Bookmark.Bookmarks()
+        call i.delete()
+    endfor
+    call s:Bookmark.Write()
+endfunction
+
+" FUNCTION: Bookmark.delete() {{{1
+" Delete this bookmark. If the node for this bookmark is under the current
+" root, then recache bookmarks for its Path object
+function! s:Bookmark.delete()
+    call remove(s:Bookmark.Bookmarks(), index(s:Bookmark.Bookmarks(), self))
+    call s:Bookmark.Write()
+endfunction
+
+" FUNCTION: s:Edit() {{{1
+" opens the NERDTreeBookmarks file for manual editing
+function! s:Bookmark.Edit()
+    call nerdtree#exec('wincmd w', 1)
+    call nerdtree#exec('edit '.g:NERDTreeBookmarksFile, 1)
+endfunction
+
+" FUNCTION: Bookmark.getNode(nerdtree, searchFromAbsoluteRoot) {{{1
+" Returns the tree node object associated with this Bookmark.
+" Throws NERDTree.BookmarkedNodeNotFoundError if the node is not found.
+"
+" Args:
+" searchFromAbsoluteRoot: boolean flag, search from the highest cached node
+"   if true and from the current tree root if false
+function! s:Bookmark.getNode(nerdtree, searchFromAbsoluteRoot)
+    if a:searchFromAbsoluteRoot
+        let l:searchRoot = a:nerdtree.root.AbsoluteTreeRoot()
+    else
+        let l:searchRoot = a:nerdtree.root
+    endif
+    let l:targetNode = l:searchRoot.findNode(self.path)
+    if empty(l:targetNode)
+        throw 'NERDTree.BookmarkedNodeNotFoundError: node for bookmark "' . self.name . '" not found'
+    endif
+    return l:targetNode
+endfunction
+
+" FUNCTION: Bookmark.GetNodeForName(name, searchFromAbsoluteRoot, nerdtree) {{{1
+" Class method that returns the tree node object for the Bookmark with the
+" given name. Throws NERDTree.BookmarkNotFoundError if a Bookmark with the
+" name does not exist. Throws NERDTree.BookmarkedNodeNotFoundError if a
+" tree node for the named Bookmark could not be found.
+function! s:Bookmark.GetNodeForName(name, searchFromAbsoluteRoot, nerdtree)
+    let l:bookmark = s:Bookmark.BookmarkFor(a:name)
+    return l:bookmark.getNode(a:nerdtree, a:searchFromAbsoluteRoot)
+endfunction
+
+" FUNCTION: Bookmark.GetSelected() {{{1
+" returns the Bookmark the cursor is over, or {}
+function! s:Bookmark.GetSelected()
+    let line = getline('.')
+    let name = substitute(line, '^>\(.\{-}\) .\+$', '\1', '')
+    if name !=# line
+        try
+            return s:Bookmark.BookmarkFor(name)
+        catch /^NERDTree.BookmarkNotFoundError/
+            return {}
+        endtry
+    endif
+    return {}
+endfunction
+
+" FUNCTION: Bookmark.InvalidBookmarks() {{{1
+" Class method to get all invalid bookmark strings read from the bookmarks
+" file
+function! s:Bookmark.InvalidBookmarks()
+    if !exists('g:NERDTreeInvalidBookmarks')
+        let g:NERDTreeInvalidBookmarks = []
+    endif
+    return g:NERDTreeInvalidBookmarks
+endfunction
+
+" FUNCTION: Bookmark.mustExist() {{{1
+function! s:Bookmark.mustExist()
+    if !self.path.exists()
+        call s:Bookmark.CacheBookmarks(1)
+        throw 'NERDTree.BookmarkPointsToInvalidLocationError: the bookmark "'.
+            \ self.name .'" points to a non existing location: "'. self.path.str()
+    endif
+endfunction
+
+" FUNCTION: Bookmark.New(name, path) {{{1
+" Create a new bookmark object with the given name and path object
+function! s:Bookmark.New(name, path)
+    if a:name =~# ' '
+        throw 'NERDTree.IllegalBookmarkNameError: illegal name:' . a:name
+    endif
+
+    let newBookmark = copy(self)
+    let newBookmark.name = a:name
+    let newBookmark.path = a:path
+    return newBookmark
+endfunction
+
+" FUNCTION: Bookmark.open(nerdtree, [options]) {{{1
+"Args:
+"
+"nerdtree: the tree to load open the bookmark in
+"
+"A dictionary containing the following keys (all optional):
+"  'where': Specifies whether the node should be opened in new split/tab or in
+"           the previous window. Can be either 'v' (vertical split), 'h'
+"           (horizontal split), 't' (new tab) or 'p' (previous window).
+"  'reuse': if a window is displaying the file then jump the cursor there
+"  'keepopen': dont close the tree window
+"  'stay': open the file, but keep the cursor in the tree win
+"
+function! s:Bookmark.open(nerdtree, ...)
+    let opts = a:0 ? a:1 : {}
+
+    if nerdtree#closeBookmarksOnOpen()
+        call a:nerdtree.ui.toggleShowBookmarks()
+    endif
+
+    if self.path.isDirectory && !has_key(opts, 'where')
+        call self.toRoot(a:nerdtree)
+    else
+        let opener = g:NERDTreeOpener.New(self.path, opts)
+        call opener.open(self)
+    endif
+endfunction
+
+" FUNCTION: Bookmark.openInNewTab(options) {{{1
+" Create a new bookmark object with the given name and path object
+function! s:Bookmark.openInNewTab(options)
+    call nerdtree#deprecated('Bookmark.openInNewTab', 'is deprecated, use open() instead')
+    call self.open(a:options)
+endfunction
+
+" FUNCTION: Bookmark.setPath(path) {{{1
+" makes this bookmark point to the given path
+function! s:Bookmark.setPath(path)
+    let self.path = a:path
+endfunction
+
+" FUNCTION: Bookmark.SortBookmarksList() {{{1
+" Class method that sorts the global list of bookmarks alphabetically by name.
+" Note that case-sensitivity is determined by a user option.
+function! s:Bookmark.SortBookmarksList()
+    call sort(s:Bookmark.Bookmarks(), s:Bookmark.CompareBookmarksByName, s:Bookmark)
+endfunction
+
+" FUNCTION: Bookmark.str() {{{1
+" Get the string that should be rendered in the view for this bookmark
+function! s:Bookmark.str()
+    let pathStrMaxLen = winwidth(g:NERDTree.GetWinNum()) - 4 - strdisplaywidth(self.name)
+    if &number
+        let pathStrMaxLen = pathStrMaxLen - &numberwidth
+    endif
+
+    let pathStr = self.path.str({'format': 'UI'})
+    if strdisplaywidth(pathStr) > pathStrMaxLen
+        while strdisplaywidth(pathStr) > pathStrMaxLen && strchars(pathStr) > 0
+            let pathStr = substitute(pathStr, '^.', '', '')
+        endwhile
+        let pathStr = '<' . pathStr
+    endif
+    return '>' . self.name . ' ' . pathStr
+endfunction
+
+" FUNCTION: Bookmark.toRoot(nerdtree) {{{1
+" Set the root of the given NERDTree to the node for this Bookmark. If a node
+" for this Bookmark does not exist, a new one is initialized.
+function! s:Bookmark.toRoot(nerdtree)
+    if self.validate()
+        try
+            let l:targetNode = self.getNode(a:nerdtree, 1)
+            call l:targetNode.closeChildren()
+        catch /^NERDTree.BookmarkedNodeNotFoundError/
+            let l:targetNode = g:NERDTreeFileNode.New(s:Bookmark.BookmarkFor(self.name).path, a:nerdtree)
+        endtry
+        call a:nerdtree.changeRoot(l:targetNode)
+    endif
+endfunction
+
+" FUNCTION: Bookmark.ToRoot(name, nerdtree) {{{1
+" Class method that makes the Bookmark with the given name the root of
+" specified NERDTree.
+function! s:Bookmark.ToRoot(name, nerdtree)
+    let l:bookmark = s:Bookmark.BookmarkFor(a:name)
+    call l:bookmark.toRoot(a:nerdtree)
+endfunction
+
+" FUNCTION: Bookmark.validate() {{{1
+function! s:Bookmark.validate()
+    if self.path.exists()
+        return 1
+    else
+        call s:Bookmark.CacheBookmarks(1)
+        call nerdtree#echo(self.name . 'now points to an invalid location. See :help NERDTreeInvalidBookmarks for info.')
+        return 0
+    endif
+endfunction
+
+" FUNCTION: Bookmark.Write() {{{1
+" Class method to write all bookmarks to the bookmarks file
+function! s:Bookmark.Write()
+    let bookmarkStrings = []
+    for i in s:Bookmark.Bookmarks()
+        call add(bookmarkStrings, i.name . ' ' . fnamemodify(i.path.str(), ':~'))
+    endfor
+
+    "add a blank line before the invalid ones
+    call add(bookmarkStrings, '')
+
+    for j in s:Bookmark.InvalidBookmarks()
+        call add(bookmarkStrings, j)
+    endfor
+
+    try
+        call writefile(bookmarkStrings, g:NERDTreeBookmarksFile)
+    catch
+        call nerdtree#echoError('Failed to write bookmarks file. Make sure g:NERDTreeBookmarksFile points to a valid location.')
+    endtry
+endfunction
+
+" vim: set sw=4 sts=4 et fdm=marker:

lib/nerdtree/creator.vim

@@ -0,0 +1,438 @@
+" ============================================================================
+" CLASS: Creator
+"
+" This class is responsible for creating NERDTree instances.  The new NERDTree
+" may be a tab tree, a window tree, or a mirrored tree.  In the process of
+" creating a NERDTree, it sets up all of the window and buffer options and key
+" mappings etc.
+" ============================================================================
+
+
+let s:Creator = {}
+let g:NERDTreeCreator = s:Creator
+
+" FUNCTION: s:Creator._bindMappings() {{{1
+function! s:Creator._bindMappings()
+    call g:NERDTreeKeyMap.BindAll()
+
+    command! -buffer -nargs=? Bookmark :call nerdtree#ui_glue#bookmarkNode('<args>')
+    command! -buffer -complete=customlist,nerdtree#completeBookmarks -nargs=1 RevealBookmark :call nerdtree#ui_glue#revealBookmark('<args>')
+    command! -buffer -complete=customlist,nerdtree#completeBookmarks -nargs=1 OpenBookmark call nerdtree#ui_glue#openBookmark('<args>')
+    command! -buffer -complete=customlist,nerdtree#completeBookmarks -nargs=* ClearBookmarks call nerdtree#ui_glue#clearBookmarks('<args>')
+    command! -buffer -complete=customlist,nerdtree#completeBookmarks -nargs=+ BookmarkToRoot call g:NERDTreeBookmark.ToRoot('<args>', b:NERDTree)
+    command! -buffer -nargs=0 ClearAllBookmarks call g:NERDTreeBookmark.ClearAll() <bar> call b:NERDTree.render()
+    command! -buffer -nargs=0 ReadBookmarks call g:NERDTreeBookmark.CacheBookmarks(0) <bar> call b:NERDTree.render()
+    command! -buffer -nargs=0 WriteBookmarks call g:NERDTreeBookmark.Write()
+    command! -buffer -nargs=0 EditBookmarks call g:NERDTreeBookmark.Edit()
+endfunction
+
+" FUNCTION: s:Creator._broadcastInitEvent() {{{1
+function! s:Creator._broadcastInitEvent()
+    if exists('#User#NERDTreeInit')
+        doautocmd User NERDTreeInit
+    endif
+endfunction
+
+" FUNCTION: s:Creator.BufNamePrefix() {{{1
+function! s:Creator.BufNamePrefix()
+    return 'NERD_tree_'
+endfunction
+
+" FUNCTION: s:Creator.CreateExploreTree(dir) {{{1
+function! s:Creator.CreateExploreTree(dir)
+    try
+        let path = g:NERDTreePath.New(a:dir)
+    catch /^NERDTree.InvalidArgumentsError/
+        call nerdtree#echo('Invalid directory name:' . a:dir)
+        return
+    endtry
+
+    let creator = s:Creator.New()
+    if getbufinfo('%')[0].changed && !&hidden && !&autowriteall
+        let l:splitLocation = g:NERDTreeWinPos ==# 'left' || g:NERDTreeWinPos ==# 'top' ? 'topleft ' : 'botright '
+        let l:splitDirection = g:NERDTreeWinPos ==# 'left' || g:NERDTreeWinPos ==# 'right' ? 'vertical' : ''
+        silent! execute l:splitLocation . l:splitDirection . ' new'
+    else
+        silent! execute 'enew'
+    endif
+
+    call creator.createWindowTree(a:dir)
+    "we want windowTree buffer to disappear after moving to any other buffer
+    setlocal bufhidden=wipe
+endfunction
+
+" FUNCTION: s:Creator.CreateTabTree(a:name) {{{1
+function! s:Creator.CreateTabTree(name)
+    let creator = s:Creator.New()
+    call creator.createTabTree(a:name)
+endfunction
+
+" FUNCTION: s:Creator.createTabTree(a:name) {{{1
+" name: the name of a bookmark or a directory
+function! s:Creator.createTabTree(name)
+    let l:path = self._pathForString(a:name)
+
+    " Abort if an exception was thrown (i.e., if the bookmark or directory
+    " does not exist).
+    if empty(l:path)
+        return
+    endif
+
+    " Obey the user's preferences for changing the working directory.
+    if g:NERDTreeChDirMode != 0
+        call l:path.changeToDir()
+    endif
+
+    if g:NERDTree.ExistsForTab()
+        call g:NERDTree.Close()
+        call self._removeTreeBufForTab()
+    endif
+
+    call self._createTreeWin()
+    call self._createNERDTree(l:path, 'tab')
+    call b:NERDTree.render()
+    call b:NERDTree.root.putCursorHere(0, 0)
+
+    call self._broadcastInitEvent()
+endfunction
+
+" FUNCTION: s:Creator.CreateWindowTree(dir) {{{1
+function! s:Creator.CreateWindowTree(dir)
+    let creator = s:Creator.New()
+    call creator.createWindowTree(a:dir)
+endfunction
+
+" FUNCTION: s:Creator.createWindowTree(dir) {{{1
+function! s:Creator.createWindowTree(dir)
+    try
+        let path = g:NERDTreePath.New(a:dir)
+    catch /^NERDTree.InvalidArgumentsError/
+        call nerdtree#echo('Invalid directory name:' . a:dir)
+        return
+    endtry
+
+    "we want the directory buffer to disappear when we do the :edit below
+    setlocal bufhidden=wipe
+
+    let previousBuf = expand('#')
+
+    "we need a unique name for each window tree buffer to ensure they are
+    "all independent
+    exec g:NERDTreeCreatePrefix . ' edit ' . self._nextBufferName('win')
+
+    call self._createNERDTree(path, 'window')
+    let b:NERDTree._previousBuf = bufnr(previousBuf)
+    call self._setCommonBufOptions()
+
+    call b:NERDTree.render()
+
+    call self._broadcastInitEvent()
+endfunction
+
+" FUNCTION: s:Creator._createNERDTree(path) {{{1
+function! s:Creator._createNERDTree(path, type)
+    let b:NERDTree = g:NERDTree.New(a:path, a:type)
+
+    " TODO: This assignment is kept for compatibility reasons.  Many other
+    " plugins use b:NERDTreeRoot instead of b:NERDTree.root.  Remove this
+    " assignment in the future.
+    let b:NERDTreeRoot = b:NERDTree.root
+
+    call b:NERDTree.root.open()
+endfunction
+
+" FUNCTION: s:Creator.CreateMirror() {{{1
+function! s:Creator.CreateMirror()
+    let creator = s:Creator.New()
+    call creator.createMirror()
+endfunction
+
+" FUNCTION: s:Creator.createMirror() {{{1
+function! s:Creator.createMirror()
+    "get the names off all the nerd tree buffers
+    let treeBufNames = []
+    for i in range(1, tabpagenr('$'))
+        let nextName = self._tabpagevar(i, 'NERDTreeBufName')
+        if nextName != -1 && (!exists('t:NERDTreeBufName') || nextName != t:NERDTreeBufName)
+            call add(treeBufNames, nextName)
+        endif
+    endfor
+    let treeBufNames = self._uniq(treeBufNames)
+
+    "map the option names (that the user will be prompted with) to the nerd
+    "tree buffer names
+    let options = {}
+    let i = 0
+    while i < len(treeBufNames)
+        let bufName = treeBufNames[i]
+        let treeRoot = getbufvar(bufName, 'NERDTree').root
+        let options[i+1 . '. ' . treeRoot.path.str() . '  (buf name: ' . bufName . ')'] = bufName
+        let i = i + 1
+    endwhile
+
+    "work out which tree to mirror, if there is more than 1 then ask the user
+    let bufferName = ''
+    if len(keys(options)) > 1
+        let choices = ['Choose a tree to mirror']
+        let choices = extend(choices, sort(keys(options)))
+        let choice = inputlist(choices)
+        if choice < 1 || choice > len(options) || choice ==# ''
+            return
+        endif
+
+        let bufferName = options[sort(keys(options))[choice-1]]
+    elseif len(keys(options)) ==# 1
+        let bufferName = values(options)[0]
+    else
+        call nerdtree#echo('No trees to mirror')
+        return
+    endif
+
+    if g:NERDTree.ExistsForTab() && g:NERDTree.IsOpen()
+        call g:NERDTree.Close()
+    endif
+
+    let t:NERDTreeBufName = bufferName
+    call self._createTreeWin()
+    exec 'buffer ' .  bufferName
+    call b:NERDTree.ui.restoreScreenState()
+    if !&hidden
+        call b:NERDTree.render()
+    endif
+endfunction
+
+" FUNCTION: s:Creator._createTreeWin() {{{1
+" Initialize the NERDTree window.  Open the window, size it properly, set all
+" local options, etc.
+function! s:Creator._createTreeWin()
+    let l:splitLocation = g:NERDTreeWinPos ==# 'left' || g:NERDTreeWinPos ==# 'top' ? 'topleft ' : 'botright '
+    let l:splitDirection = g:NERDTreeWinPos ==# 'left' || g:NERDTreeWinPos ==# 'right' ? 'vertical' : ''
+    let l:splitSize = g:NERDTreeWinSize
+
+    if !g:NERDTree.ExistsForTab()
+        let t:NERDTreeBufName = self._nextBufferName('tab')
+        silent! execute l:splitLocation . l:splitDirection . ' ' . l:splitSize . ' new'
+        silent! execute 'edit ' . t:NERDTreeBufName
+        silent! execute l:splitDirection . ' resize '. l:splitSize
+    else
+        silent! execute l:splitLocation . l:splitDirection . ' ' . l:splitSize . ' split'
+        silent! execute 'buffer ' . t:NERDTreeBufName
+    endif
+
+    setlocal winfixwidth
+
+    call self._setCommonBufOptions()
+
+    if has('patch-7.4.1925')
+        clearjumps
+    endif
+
+endfunction
+
+" FUNCTION: s:Creator._isBufHidden(nr) {{{1
+function! s:Creator._isBufHidden(nr)
+    redir => bufs
+    silent ls!
+    redir END
+
+    return bufs =~ a:nr . '..h'
+endfunction
+
+" FUNCTION: s:Creator.New() {{{1
+function! s:Creator.New()
+    let newCreator = copy(self)
+    return newCreator
+endfunction
+
+" FUNCTION: s:Creator._nextBufferName(type='') {{{1
+" gets an optional buffer type of either 'tab' or 'win'.
+" returns the buffer name for the next nerd tree of such type.
+function! s:Creator._nextBufferName(...)
+    if a:0 > 0
+        let type = a:1
+    else
+        let type = ''
+    end
+    let name = s:Creator.BufNamePrefix()
+    if type ==# 'tab'
+        let name = name . 'tab_'
+    elseif type ==# 'win'
+        let name = name . 'win_'
+    endif
+    let name = name . self._nextBufferNumber()
+    return name
+endfunction
+
+" FUNCTION: s:Creator._nextBufferNumber() {{{1
+" the number to add to the nerd tree buffer name to make the buf name unique
+function! s:Creator._nextBufferNumber()
+    if !exists('s:Creator._NextBufNum')
+        let s:Creator._NextBufNum = 1
+    else
+        let s:Creator._NextBufNum += 1
+    endif
+
+    return s:Creator._NextBufNum
+endfunction
+
+" FUNCTION: s:Creator._pathForString(str) {{{1
+" find a bookmark or adirectory for the given string
+function! s:Creator._pathForString(str)
+    let path = {}
+    if g:NERDTreeBookmark.BookmarkExistsFor(a:str)
+        let path = g:NERDTreeBookmark.BookmarkFor(a:str).path
+    else
+        let dir = a:str ==# '' ? getcwd() : a:str
+
+        "hack to get an absolute path if a relative path is given
+        if dir =~# '^\.'
+            let dir = getcwd() . nerdtree#slash() . dir
+        endif
+
+        "hack to prevent removing slash if dir is the root of the file system.
+        if dir !=# '/'
+            let dir = g:NERDTreePath.Resolve(dir)
+        endif
+
+        try
+            let path = g:NERDTreePath.New(dir)
+        catch /^NERDTree.InvalidArgumentsError/
+            call nerdtree#echo('No bookmark or directory found for: ' . a:str)
+            return {}
+        endtry
+    endif
+    if !path.isDirectory
+        let path = path.getParent()
+    endif
+
+    return path
+endfunction
+
+" Function: s:Creator._removeTreeBufForTab()   {{{1
+function! s:Creator._removeTreeBufForTab()
+    let buf = bufnr(t:NERDTreeBufName)
+
+    "if &hidden is not set then it will already be gone
+    if buf != -1
+
+        "nerdtree buf may be mirrored/displayed elsewhere
+        if self._isBufHidden(buf)
+            exec 'bwipeout ' . buf
+        endif
+
+    endif
+
+    unlet t:NERDTreeBufName
+endfunction
+
+" FUNCTION: s:Creator._setCommonBufOptions() {{{1
+function! s:Creator._setCommonBufOptions()
+
+    " Options for a non-file/control buffer.
+    setlocal bufhidden=hide
+    setlocal buftype=nofile
+    setlocal noswapfile
+
+    " Options for controlling buffer/window appearance.
+    setlocal foldcolumn=0
+    setlocal foldmethod=manual
+    setlocal nobuflisted
+    setlocal nofoldenable
+    setlocal nolist
+    setlocal nospell
+    setlocal nowrap
+
+    if g:NERDTreeShowLineNumbers
+        setlocal number
+    else
+        setlocal nonumber
+        if v:version >= 703
+            setlocal norelativenumber
+        endif
+    endif
+
+    iabc <buffer>
+
+    if g:NERDTreeHighlightCursorline
+        setlocal cursorline
+    endif
+
+    call self._setupStatusline()
+    call self._bindMappings()
+
+    setlocal filetype=nerdtree
+endfunction
+
+" FUNCTION: s:Creator._setupStatusline() {{{1
+function! s:Creator._setupStatusline()
+    if g:NERDTreeStatusline != -1
+        let &l:statusline = g:NERDTreeStatusline
+    endif
+endfunction
+
+" FUNCTION: s:Creator._tabpagevar(tabnr, var) {{{1
+function! s:Creator._tabpagevar(tabnr, var)
+    let currentTab = tabpagenr()
+    let old_ei = &eventignore
+    set eventignore=all
+
+    try
+        exec 'tabnext ' . a:tabnr
+        let v = -1
+        if exists('t:' . a:var)
+            exec 'let v = t:' . a:var
+        endif
+        exec 'tabnext ' . currentTab
+
+    finally
+        let &eventignore = old_ei
+    endtry
+
+    return v
+endfunction
+
+" FUNCTION: s:Creator.ToggleTabTree(dir) {{{1
+function! s:Creator.ToggleTabTree(dir)
+    let creator = s:Creator.New()
+    call creator.toggleTabTree(a:dir)
+endfunction
+
+" FUNCTION: s:Creator.toggleTabTree(dir) {{{1
+" Toggles the NERD tree. I.e if the NERD tree is open, it is closed. If it is
+" closed, it is restored or initialized. If dir is not empty, it will be set
+" as the new root.
+"
+" Args:
+" dir: the full path for the root node (is used if the NERD tree is being
+" initialized, or to change the root to a new dir.)
+function! s:Creator.toggleTabTree(dir)
+    if g:NERDTree.ExistsForTab()
+        if !g:NERDTree.IsOpen()
+            call self._createTreeWin()
+            if !empty(a:dir) && a:dir !=# b:NERDTree.root.path.str()
+                call self.createTabTree(a:dir)
+            elseif !&hidden
+                call b:NERDTree.render()
+            endif
+            call b:NERDTree.ui.restoreScreenState()
+        else
+            call g:NERDTree.Close()
+        endif
+    else
+        call self.createTabTree(a:dir)
+    endif
+endfunction
+
+" Function: s:Creator._uniq(list)   {{{1
+" returns a:list without duplicates
+function! s:Creator._uniq(list)
+  let uniqlist = []
+  for elem in a:list
+    if index(uniqlist, elem) ==# -1
+      let uniqlist += [elem]
+    endif
+  endfor
+  return uniqlist
+endfunction
+
+" vim: set sw=4 sts=4 et fdm=marker:

lib/nerdtree/event.vim

@@ -0,0 +1,13 @@
+"CLASS: Event
+"============================================================
+let s:Event = {}
+let g:NERDTreeEvent = s:Event
+
+function! s:Event.New(nerdtree, subject, action, params) abort
+    let newObj = copy(self)
+    let newObj.nerdtree = a:nerdtree
+    let newObj.subject = a:subject
+    let newObj.action = a:action
+    let newObj.params = a:params
+    return newObj
+endfunction

lib/nerdtree/flag_set.vim

@@ -0,0 +1,58 @@
+"CLASS: FlagSet
+"============================================================
+let s:FlagSet = {}
+let g:NERDTreeFlagSet = s:FlagSet
+
+"FUNCTION: FlagSet.addFlag(scope, flag) {{{1
+function! s:FlagSet.addFlag(scope, flag)
+    let flags = self._flagsForScope(a:scope)
+    if index(flags, a:flag) == -1
+        call add(flags, a:flag)
+    end
+endfunction
+
+"FUNCTION: FlagSet.clearFlags(scope) {{{1
+function! s:FlagSet.clearFlags(scope)
+    let self._flags[a:scope] = []
+endfunction
+
+"FUNCTION: FlagSet._flagsForScope(scope) {{{1
+function! s:FlagSet._flagsForScope(scope)
+    if !has_key(self._flags, a:scope)
+        let self._flags[a:scope] = []
+    endif
+    return self._flags[a:scope]
+endfunction
+
+"FUNCTION: FlagSet.New() {{{1
+function! s:FlagSet.New()
+    let newObj = copy(self)
+    let newObj._flags = {}
+    return newObj
+endfunction
+
+"FUNCTION: FlagSet.removeFlag(scope, flag) {{{1
+function! s:FlagSet.removeFlag(scope, flag)
+    let flags = self._flagsForScope(a:scope)
+
+    let i = index(flags, a:flag)
+    if i >= 0
+        call remove(flags, i)
+    endif
+endfunction
+
+"FUNCTION: FlagSet.renderToString() {{{1
+function! s:FlagSet.renderToString()
+    let flagstring = ''
+    for i in values(self._flags)
+        let flagstring .= join(i)
+    endfor
+
+    if len(flagstring) == 0
+        return ''
+    endif
+
+    return '[' . flagstring . ']'
+endfunction
+
+" vim: set sw=4 sts=4 et fdm=marker:

lib/nerdtree/key_map.vim

@@ -0,0 +1,164 @@
+"CLASS: KeyMap
+"============================================================
+let s:KeyMap = {}
+let g:NERDTreeKeyMap = s:KeyMap
+let s:keyMaps = {}
+
+"FUNCTION: KeyMap.All() {{{1
+function! s:KeyMap.All()
+    let sortedKeyMaps = values(s:keyMaps)
+    call sort(sortedKeyMaps, s:KeyMap.Compare, s:KeyMap)
+
+    return sortedKeyMaps
+endfunction
+
+"FUNCTION: KeyMap.Compare(keyMap1, keyMap2) {{{1
+function! s:KeyMap.Compare(keyMap1, keyMap2)
+
+    if a:keyMap1.key >? a:keyMap2.key
+        return 1
+    endif
+
+    if a:keyMap1.key <? a:keyMap2.key
+        return -1
+    endif
+
+    return 0
+endfunction
+
+"FUNCTION: KeyMap.FindFor(key, scope) {{{1
+function! s:KeyMap.FindFor(key, scope)
+    return get(s:keyMaps, a:key . a:scope, {})
+endfunction
+
+"FUNCTION: KeyMap.BindAll() {{{1
+function! s:KeyMap.BindAll()
+    for i in values(s:keyMaps)
+        call i.bind()
+    endfor
+endfunction
+
+"FUNCTION: KeyMap.bind() {{{1
+function! s:KeyMap.bind()
+    " If the key sequence we're trying to map contains any '<>' notation, we
+    " must replace each of the '<' characters with '<lt>' to ensure the string
+    " is not translated into its corresponding keycode during the later part
+    " of the map command below
+    " :he <>
+    let specialNotationRegex = '\m<\([[:alnum:]_-]\+>\)'
+    if self.key =~# specialNotationRegex
+        let keymapInvokeString = substitute(self.key, specialNotationRegex, '<lt>\1', 'g')
+    else
+        let keymapInvokeString = self.key
+    endif
+    let keymapInvokeString = escape(keymapInvokeString, '\"')
+
+    let premap = self.key ==# '<LeftRelease>' ? ' <LeftRelease>' : ' '
+
+    exec 'nnoremap <buffer> <silent> '. self.key . premap . ':call nerdtree#ui_glue#invokeKeyMap("'. keymapInvokeString .'")<cr>'
+endfunction
+
+"FUNCTION: KeyMap.Remove(key, scope) {{{1
+function! s:KeyMap.Remove(key, scope)
+    return remove(s:keyMaps, a:key . a:scope)
+endfunction
+
+"FUNCTION: KeyMap.invoke() {{{1
+"Call the KeyMaps callback function
+function! s:KeyMap.invoke(...)
+    let l:Callback = type(self.callback) ==# type(function('tr')) ? self.callback : function(self.callback)
+    if a:0
+        call l:Callback(a:1)
+    else
+        call l:Callback()
+    endif
+endfunction
+
+"FUNCTION: KeyMap.Invoke() {{{1
+"Find a keymapping for a:key and the current scope invoke it.
+"
+"Scope is determined as follows:
+"   * if the cursor is on a dir node then DirNode
+"   * if the cursor is on a file node then FileNode
+"   * if the cursor is on a bookmark then Bookmark
+"
+"If a keymap has the scope of 'all' then it will be called if no other keymap
+"is found for a:key and the scope.
+function! s:KeyMap.Invoke(key)
+
+    "required because clicking the command window below another window still
+    "invokes the <LeftRelease> mapping - but changes the window cursor
+    "is in first
+    "
+    "TODO: remove this check when the vim bug is fixed
+    if !g:NERDTree.ExistsForBuf()
+        return {}
+    endif
+
+    let node = g:NERDTreeFileNode.GetSelected()
+    if !empty(node)
+
+        "try file node
+        if !node.path.isDirectory
+            let km = s:KeyMap.FindFor(a:key, 'FileNode')
+            if !empty(km)
+                return km.invoke(node)
+            endif
+        endif
+
+        "try dir node
+        if node.path.isDirectory
+            let km = s:KeyMap.FindFor(a:key, 'DirNode')
+            if !empty(km)
+                return km.invoke(node)
+            endif
+        endif
+
+        "try generic node
+        let km = s:KeyMap.FindFor(a:key, 'Node')
+        if !empty(km)
+            return km.invoke(node)
+        endif
+
+    endif
+
+    "try bookmark
+    let bm = g:NERDTreeBookmark.GetSelected()
+    if !empty(bm)
+        let km = s:KeyMap.FindFor(a:key, 'Bookmark')
+        if !empty(km)
+            return km.invoke(bm)
+        endif
+    endif
+
+    "try all
+    let km = s:KeyMap.FindFor(a:key, 'all')
+    if !empty(km)
+        return km.invoke()
+    endif
+endfunction
+
+"FUNCTION: KeyMap.Create(options) {{{1
+function! s:KeyMap.Create(options)
+    let opts = extend({'scope': 'all', 'quickhelpText': ''}, copy(a:options))
+
+    "dont override other mappings unless the 'override' option is given
+    if get(opts, 'override', 0) ==# 0 && !empty(s:KeyMap.FindFor(opts['key'], opts['scope']))
+        return
+    end
+
+    let newKeyMap = copy(self)
+    let newKeyMap.key = opts['key']
+    let newKeyMap.quickhelpText = opts['quickhelpText']
+    let newKeyMap.callback = opts['callback']
+    let newKeyMap.scope = opts['scope']
+
+    call s:KeyMap.Add(newKeyMap)
+endfunction
+
+"FUNCTION: KeyMap.Add(keymap) {{{1
+function! s:KeyMap.Add(keymap)
+    let s:keyMaps[a:keymap.key . a:keymap.scope] = a:keymap
+endfunction
+
+" vim: set sw=4 sts=4 et fdm=marker:

lib/nerdtree/menu_controller.vim

@@ -0,0 +1,211 @@
+"CLASS: MenuController
+"============================================================
+let s:MenuController = {}
+let g:NERDTreeMenuController = s:MenuController
+
+"FUNCTION: MenuController.New(menuItems) {{{1
+"create a new menu controller that operates on the given menu items
+function! s:MenuController.New(menuItems)
+    let newMenuController =  copy(self)
+    if a:menuItems[0].isSeparator()
+        let newMenuController.menuItems = a:menuItems[1:-1]
+    else
+        let newMenuController.menuItems = a:menuItems
+    endif
+    return newMenuController
+endfunction
+
+" FUNCTION: s:MenuController.isMinimal() {{{1
+function! s:MenuController.isMinimal()
+    return g:NERDTreeMinimalMenu
+endfunction
+
+" FUNCTION: MenuController.showMenu() {{{1
+" Enter the main loop of the NERDTree menu, prompting the user to select
+" a menu item.
+function! s:MenuController.showMenu()
+    call self._saveOptions()
+
+    try
+        let self.selection = 0
+        let l:done = 0
+
+        while !l:done
+            if has('nvim')
+                mode
+            else
+                redraw!
+            endif
+            call self._echoPrompt()
+
+            let l:key = nr2char(getchar())
+            let l:done = self._handleKeypress(l:key)
+        endwhile
+    finally
+        call self._restoreOptions()
+
+        " Redraw when Ctrl-C or Esc is received.
+        if !l:done || self.selection ==# -1
+            redraw!
+        endif
+    endtry
+
+    if self.selection !=# -1
+        let l:m = self._current()
+        call l:m.execute()
+    endif
+endfunction
+
+"FUNCTION: MenuController._echoPrompt() {{{1
+function! s:MenuController._echoPrompt()
+    let navHelp = 'Use ' . g:NERDTreeMenuDown . '/' . g:NERDTreeMenuUp . '/enter'
+
+    if self.isMinimal()
+        let selection = self.menuItems[self.selection].text
+        let keyword = matchstr(selection, '[^ ]*([^ ]*')
+
+        let shortcuts = map(copy(self.menuItems), "v:val['shortcut']")
+        let shortcuts[self.selection] = ' ' . keyword . ' '
+
+        echo 'Menu: [' . join(shortcuts, ',') . '] (' . navHelp . ' or shortcut): '
+    else
+        echo 'NERDTree Menu. ' . navHelp . ', or the shortcuts indicated'
+        echo '========================================================='
+
+        for i in range(0, len(self.menuItems)-1)
+            if self.selection ==# i
+                echo '> ' . self.menuItems[i].text
+            else
+                echo '  ' . self.menuItems[i].text
+            endif
+        endfor
+    endif
+endfunction
+
+"FUNCTION: MenuController._current(key) {{{1
+"get the MenuItem that is currently selected
+function! s:MenuController._current()
+    return self.menuItems[self.selection]
+endfunction
+
+"FUNCTION: MenuController._handleKeypress(key) {{{1
+"change the selection (if appropriate) and return 1 if the user has made
+"their choice, 0 otherwise
+function! s:MenuController._handleKeypress(key)
+    if a:key ==# g:NERDTreeMenuDown
+        call self._cursorDown()
+    elseif a:key ==# g:NERDTreeMenuUp
+        call self._cursorUp()
+    elseif a:key ==# nr2char(27) "escape
+        let self.selection = -1
+        return 1
+    elseif a:key ==# "\r" || a:key ==# "\n" "enter and ctrl-j
+        return 1
+    else
+        let index = self._nextIndexFor(a:key)
+        if index !=# -1
+            let self.selection = index
+            if len(self._allIndexesFor(a:key)) ==# 1
+                return 1
+            endif
+        endif
+    endif
+
+    return 0
+endfunction
+
+"FUNCTION: MenuController._allIndexesFor(shortcut) {{{1
+"get indexes to all menu items with the given shortcut
+function! s:MenuController._allIndexesFor(shortcut)
+    let toReturn = []
+
+    for i in range(0, len(self.menuItems)-1)
+        if self.menuItems[i].shortcut ==# a:shortcut
+            call add(toReturn, i)
+        endif
+    endfor
+
+    return toReturn
+endfunction
+
+"FUNCTION: MenuController._nextIndexFor(shortcut) {{{1
+"get the index to the next menu item with the given shortcut, starts from the
+"current cursor location and wraps around to the top again if need be
+function! s:MenuController._nextIndexFor(shortcut)
+    for i in range(self.selection+1, len(self.menuItems)-1)
+        if self.menuItems[i].shortcut ==# a:shortcut
+            return i
+        endif
+    endfor
+
+    for i in range(0, self.selection)
+        if self.menuItems[i].shortcut ==# a:shortcut
+            return i
+        endif
+    endfor
+
+    return -1
+endfunction
+
+"FUNCTION: MenuController._setCmdheight() {{{1
+"sets &cmdheight to whatever is needed to display the menu
+function! s:MenuController._setCmdheight()
+    if self.isMinimal()
+        let &cmdheight = 1
+    else
+        let &cmdheight = len(self.menuItems) + 3
+    endif
+endfunction
+
+"FUNCTION: MenuController._saveOptions() {{{1
+"set any vim options that are required to make the menu work (saving their old
+"values)
+function! s:MenuController._saveOptions()
+    let self._oldLazyredraw = &lazyredraw
+    let self._oldCmdheight = &cmdheight
+    set nolazyredraw
+    call self._setCmdheight()
+endfunction
+
+"FUNCTION: MenuController._restoreOptions() {{{1
+"restore the options we saved in _saveOptions()
+function! s:MenuController._restoreOptions()
+    let &cmdheight = self._oldCmdheight
+    let &lazyredraw = self._oldLazyredraw
+endfunction
+
+"FUNCTION: MenuController._cursorDown() {{{1
+"move the cursor to the next menu item, skipping separators
+function! s:MenuController._cursorDown()
+    let done = 0
+    while !done
+        if self.selection < len(self.menuItems)-1
+            let self.selection += 1
+        else
+            let self.selection = 0
+        endif
+
+        if !self._current().isSeparator()
+            let done = 1
+        endif
+    endwhile
+endfunction
+
+"FUNCTION: MenuController._cursorUp() {{{1
+"move the cursor to the previous menu item, skipping separators
+function! s:MenuController._cursorUp()
+    let done = 0
+    while !done
+        if self.selection > 0
+            let self.selection -= 1
+        else
+            let self.selection = len(self.menuItems)-1
+        endif
+
+        if !self._current().isSeparator()
+            let done = 1
+        endif
+    endwhile
+endfunction
+
+" vim: set sw=4 sts=4 et fdm=marker:

lib/nerdtree/menu_item.vim

@@ -0,0 +1,118 @@
+"CLASS: MenuItem
+"============================================================
+let s:MenuItem = {}
+let g:NERDTreeMenuItem = s:MenuItem
+
+"FUNCTION: MenuItem.All() {{{1
+"get all top level menu items
+function! s:MenuItem.All()
+    if !exists('s:menuItems')
+        let s:menuItems = []
+    endif
+    return s:menuItems
+endfunction
+
+"FUNCTION: MenuItem.AllEnabled() {{{1
+"get all top level menu items that are currently enabled
+function! s:MenuItem.AllEnabled()
+    let toReturn = []
+    for i in s:MenuItem.All()
+        if i.enabled()
+            call add(toReturn, i)
+        endif
+    endfor
+    return toReturn
+endfunction
+
+"FUNCTION: MenuItem.Create(options) {{{1
+"make a new menu item and add it to the global list
+function! s:MenuItem.Create(options)
+    let newMenuItem = copy(self)
+
+    let newMenuItem.text = a:options['text']
+    let newMenuItem.shortcut = a:options['shortcut']
+    let newMenuItem.children = []
+
+    let newMenuItem.isActiveCallback = -1
+    if has_key(a:options, 'isActiveCallback')
+        let newMenuItem.isActiveCallback = a:options['isActiveCallback']
+    endif
+
+    let newMenuItem.callback = -1
+    if has_key(a:options, 'callback')
+        let newMenuItem.callback = a:options['callback']
+    endif
+
+    if has_key(a:options, 'parent')
+        call add(a:options['parent'].children, newMenuItem)
+    else
+        call add(s:MenuItem.All(), newMenuItem)
+    endif
+
+    return newMenuItem
+endfunction
+
+"FUNCTION: MenuItem.CreateSeparator(options) {{{1
+"make a new separator menu item and add it to the global list
+function! s:MenuItem.CreateSeparator(options)
+    let standard_options = { 'text': '--------------------',
+                \ 'shortcut': -1,
+                \ 'callback': -1 }
+    let options = extend(a:options, standard_options, 'force')
+
+    return s:MenuItem.Create(options)
+endfunction
+
+"FUNCTION: MenuItem.CreateSubmenu(options) {{{1
+"make a new submenu and add it to global list
+function! s:MenuItem.CreateSubmenu(options)
+    let standard_options = { 'callback': -1 }
+    let options = extend(a:options, standard_options, 'force')
+
+    return s:MenuItem.Create(options)
+endfunction
+
+"FUNCTION: MenuItem.enabled() {{{1
+"return 1 if this menu item should be displayed
+"
+"delegates off to the isActiveCallback, and defaults to 1 if no callback was
+"specified
+function! s:MenuItem.enabled()
+    if self.isActiveCallback != -1
+        return type(self.isActiveCallback) == type(function('tr')) ? self.isActiveCallback() : {self.isActiveCallback}()
+    endif
+    return 1
+endfunction
+
+"FUNCTION: MenuItem.execute() {{{1
+"perform the action behind this menu item, if this menuitem has children then
+"display a new menu for them, otherwise deletegate off to the menuitem's
+"callback
+function! s:MenuItem.execute()
+    if len(self.children)
+        let mc = g:NERDTreeMenuController.New(self.children)
+        call mc.showMenu()
+    else
+        if self.callback != -1
+            if type(self.callback) == type(function('tr'))
+                call self.callback()
+            else
+                call {self.callback}()
+            endif
+        endif
+    endif
+endfunction
+
+"FUNCTION: MenuItem.isSeparator() {{{1
+"return 1 if this menuitem is a separator
+function! s:MenuItem.isSeparator()
+    return self.callback == -1 && self.children == []
+endfunction
+
+"FUNCTION: MenuItem.isSubmenu() {{{1
+"return 1 if this menuitem is a submenu
+function! s:MenuItem.isSubmenu()
+    return self.callback == -1 && !empty(self.children)
+endfunction
+
+" vim: set sw=4 sts=4 et fdm=marker:

lib/nerdtree/nerdtree.vim

@@ -0,0 +1,209 @@
+"CLASS: NERDTree
+"============================================================
+let s:NERDTree = {}
+let g:NERDTree = s:NERDTree
+
+"FUNCTION: s:NERDTree.AddPathFilter() {{{1
+function! s:NERDTree.AddPathFilter(callback)
+    call add(s:NERDTree.PathFilters(), a:callback)
+endfunction
+
+"FUNCTION: s:NERDTree.changeRoot(node) {{{1
+function! s:NERDTree.changeRoot(node)
+    if a:node.path.isDirectory
+        let self.root = a:node
+    else
+        call a:node.cacheParent()
+        let self.root = a:node.parent
+    endif
+
+    call self.root.open()
+
+    "change dir to the dir of the new root if instructed to
+    if g:NERDTreeChDirMode >= 2
+        call self.root.path.changeToDir()
+    endif
+
+    call self.render()
+    call self.root.putCursorHere(0, 0)
+
+    if exists('#User#NERDTreeNewRoot')
+        doautocmd User NERDTreeNewRoot
+    endif
+endfunction
+
+"FUNCTION: s:NERDTree.Close() {{{1
+"Closes the tab tree window for this tab
+function! s:NERDTree.Close()
+    if !s:NERDTree.IsOpen()
+        return
+    endif
+
+    if winnr('$') !=# 1
+        " Use the window ID to identify the currently active window or fall
+        " back on the buffer ID if win_getid/win_gotoid are not available, in
+        " which case we'll focus an arbitrary window showing the buffer.
+        let l:useWinId = exists('*win_getid') && exists('*win_gotoid')
+
+        if winnr() ==# s:NERDTree.GetWinNum()
+            call nerdtree#exec('wincmd p', 1)
+            let l:activeBufOrWin = l:useWinId ? win_getid() : bufnr('')
+            call nerdtree#exec('wincmd p', 1)
+        else
+            let l:activeBufOrWin = l:useWinId ? win_getid() : bufnr('')
+        endif
+
+        call nerdtree#exec(s:NERDTree.GetWinNum() . ' wincmd w', 1)
+        call nerdtree#exec('close', 0)
+        if l:useWinId
+            call nerdtree#exec('call win_gotoid(' . l:activeBufOrWin . ')', 0)
+        else
+            call nerdtree#exec(bufwinnr(l:activeBufOrWin) . ' wincmd w', 0)
+        endif
+    else
+        close
+    endif
+endfunction
+
+"FUNCTION: s:NERDTree.CursorToBookmarkTable(){{{1
+"Places the cursor at the top of the bookmarks table
+function! s:NERDTree.CursorToBookmarkTable()
+    if !b:NERDTree.ui.getShowBookmarks()
+        throw 'NERDTree.IllegalOperationError: cant find bookmark table, bookmarks arent active'
+    endif
+
+    if g:NERDTreeMinimalUI
+        return cursor(1, 2)
+    endif
+
+    let rootNodeLine = b:NERDTree.ui.getRootLineNum()
+
+    let line = 1
+    while getline(line) !~# '^>-\+Bookmarks-\+$'
+        let line = line + 1
+        if line >= rootNodeLine
+            throw 'NERDTree.BookmarkTableNotFoundError: didnt find the bookmarks table'
+        endif
+    endwhile
+    call cursor(line, 2)
+endfunction
+
+"FUNCTION: s:NERDTree.CursorToTreeWin(){{{1
+"Places the cursor in the nerd tree window
+function! s:NERDTree.CursorToTreeWin(...)
+    call g:NERDTree.MustBeOpen()
+    call nerdtree#exec(g:NERDTree.GetWinNum() . 'wincmd w', a:0 >0 ? a:1 : 1)
+endfunction
+
+" Function: s:NERDTree.ExistsForBuffer()   {{{1
+" Returns 1 if a nerd tree root exists in the current buffer
+function! s:NERDTree.ExistsForBuf()
+    return exists('b:NERDTree')
+endfunction
+
+" Function: s:NERDTree.ExistsForTab()   {{{1
+" Returns 1 if a nerd tree root exists in the current tab
+function! s:NERDTree.ExistsForTab()
+    if !exists('t:NERDTreeBufName')
+        return
+    end
+
+    "check b:NERDTree is still there and hasn't been e.g. :bdeleted
+    return !empty(getbufvar(bufnr(t:NERDTreeBufName), 'NERDTree'))
+endfunction
+
+function! s:NERDTree.ForCurrentBuf()
+    if s:NERDTree.ExistsForBuf()
+        return b:NERDTree
+    else
+        return {}
+    endif
+endfunction
+
+"FUNCTION: s:NERDTree.ForCurrentTab() {{{1
+function! s:NERDTree.ForCurrentTab()
+    if !s:NERDTree.ExistsForTab()
+        return
+    endif
+
+    let bufnr = bufnr(t:NERDTreeBufName)
+    return getbufvar(bufnr, 'NERDTree')
+endfunction
+
+"FUNCTION: s:NERDTree.getRoot() {{{1
+function! s:NERDTree.getRoot()
+    return self.root
+endfunction
+
+"FUNCTION: s:NERDTree.GetWinNum() {{{1
+"gets the nerd tree window number for this tab
+function! s:NERDTree.GetWinNum()
+    if exists('t:NERDTreeBufName')
+        return bufwinnr(t:NERDTreeBufName)
+    endif
+
+    " If WindowTree, there is no t:NERDTreeBufName variable. Search all windows.
+    for w in range(1,winnr('$'))
+        if bufname(winbufnr(w)) =~# '^' . g:NERDTreeCreator.BufNamePrefix() . 'win_\d\+$'
+            return w
+        endif
+    endfor
+
+    return -1
+endfunction
+
+"FUNCTION: s:NERDTree.IsOpen() {{{1
+function! s:NERDTree.IsOpen()
+    return s:NERDTree.GetWinNum() !=# -1
+endfunction
+
+"FUNCTION: s:NERDTree.isTabTree() {{{1
+function! s:NERDTree.isTabTree()
+    return self._type ==# 'tab'
+endfunction
+
+"FUNCTION: s:NERDTree.isWinTree() {{{1
+function! s:NERDTree.isWinTree()
+    return self._type ==# 'window'
+endfunction
+
+"FUNCTION: s:NERDTree.MustBeOpen() {{{1
+function! s:NERDTree.MustBeOpen()
+    if !s:NERDTree.IsOpen()
+        throw 'NERDTree.TreeNotOpen'
+    endif
+endfunction
+
+"FUNCTION: s:NERDTree.New() {{{1
+function! s:NERDTree.New(path, type)
+    let newObj = copy(self)
+    let newObj.ui = g:NERDTreeUI.New(newObj)
+    let newObj.root = g:NERDTreeDirNode.New(a:path, newObj)
+    let newObj._type = a:type
+    return newObj
+endfunction
+
+"FUNCTION: s:NERDTree.PathFilters() {{{1
+function! s:NERDTree.PathFilters()
+    if !exists('s:NERDTree._PathFilters')
+        let s:NERDTree._PathFilters = []
+    endif
+    return s:NERDTree._PathFilters
+endfunction
+
+"FUNCTION: s:NERDTree.previousBuf() {{{1
+function! s:NERDTree.previousBuf()
+    return self._previousBuf
+endfunction
+
+function! s:NERDTree.setPreviousBuf(bnum)
+    let self._previousBuf = a:bnum
+endfunction
+
+"FUNCTION: s:NERDTree.render() {{{1
+"A convenience function - since this is called often
+function! s:NERDTree.render()
+    call self.ui.render()
+endfunction
+
+" vim: set sw=4 sts=4 et fdm=marker:

lib/nerdtree/notifier.vim

@@ -0,0 +1,35 @@
+"CLASS: Notifier
+"============================================================
+let s:Notifier = {}
+
+function! s:Notifier.AddListener(event, funcname)
+    let listeners = s:Notifier.GetListenersForEvent(a:event)
+    if listeners == []
+        let listenersMap = s:Notifier.GetListenersMap()
+        let listenersMap[a:event] = listeners
+    endif
+    call add(listeners, a:funcname)
+endfunction
+
+function! s:Notifier.NotifyListeners(event, path, nerdtree, params)
+    let event = g:NERDTreeEvent.New(a:nerdtree, a:path, a:event, a:params)
+
+    for Listener in s:Notifier.GetListenersForEvent(a:event)
+        let l:Callback = type(Listener) == type(function('tr')) ? Listener : function(Listener)
+        call l:Callback(event)
+    endfor
+endfunction
+
+function! s:Notifier.GetListenersMap()
+    if !exists('s:refreshListenersMap')
+        let s:refreshListenersMap = {}
+    endif
+    return s:refreshListenersMap
+endfunction
+
+function! s:Notifier.GetListenersForEvent(name)
+    let listenersMap = s:Notifier.GetListenersMap()
+    return get(listenersMap, a:name, [])
+endfunction
+
+let g:NERDTreePathNotifier = deepcopy(s:Notifier)

lib/nerdtree/opener.vim

@@ -0,0 +1,326 @@
+" ============================================================================
+" CLASS: Opener
+"
+" The Opener class defines an API for 'opening' operations.
+" ============================================================================
+
+
+let s:Opener = {}
+let g:NERDTreeOpener = s:Opener
+
+" FUNCTION: s:Opener._bufInWindows(bnum) {{{1
+" [[STOLEN FROM VTREEEXPLORER.VIM]]
+" Determine the number of windows open to this buffer number.
+" Care of Yegappan Lakshman.  Thanks!
+"
+" Args:
+" bnum: the subject buffers buffer number
+function! s:Opener._bufInWindows(bnum)
+    let cnt = 0
+    let winnum = 1
+    while 1
+        let bufnum = winbufnr(winnum)
+        if bufnum < 0
+            break
+        endif
+        if bufnum ==# a:bnum
+            let cnt = cnt + 1
+        endif
+        let winnum = winnum + 1
+    endwhile
+
+    return cnt
+endfunction
+
+" FUNCTION: Opener._checkToCloseTree(newtab) {{{1
+" Check the class options to see if the tree should be closed now.
+"
+" Args:
+" a:newtab - boolean. If set, only close the tree now if we are opening the
+" target in a new tab. This is needed because we have to close tree before we
+" leave the tab
+function! s:Opener._checkToCloseTree(newtab)
+    if self._keepopen
+        return
+    endif
+
+    if (a:newtab && self._where ==# 't') || !a:newtab
+        call g:NERDTree.Close()
+    endif
+endfunction
+
+" FUNCTION: s:Opener._firstUsableWindow() {{{1
+" find the window number of the first normal window
+function! s:Opener._firstUsableWindow()
+    let i = 1
+    while i <= winnr('$')
+        let bnum = winbufnr(i)
+        if bnum !=# -1 && getbufvar(bnum, '&buftype') ==# ''
+                    \ && !getwinvar(i, '&previewwindow')
+                    \ && (!getbufvar(bnum, '&modified') || &hidden)
+            return i
+        endif
+
+        let i += 1
+    endwhile
+    return -1
+endfunction
+
+" FUNCTION: Opener._gotoTargetWin() {{{1
+function! s:Opener._gotoTargetWin()
+    if b:NERDTree.isWinTree()
+        if self._where ==# 'v'
+            call self._newVSplit()
+        elseif self._where ==# 'h'
+            call self._newSplit()
+        elseif self._where ==# 't'
+            tabnew
+        endif
+    else
+        call self._checkToCloseTree(1)
+
+        if self._where ==# 'v'
+            call self._newVSplit()
+        elseif self._where ==# 'h'
+            call self._newSplit()
+        elseif self._where ==# 't'
+            tabnew
+        elseif self._where ==# 'p'
+            call self._previousWindow()
+        endif
+
+        call self._checkToCloseTree(0)
+    endif
+endfunction
+
+" FUNCTION: s:Opener._isWindowUsable(winnumber) {{{1
+" Returns 0 if opening a file from the tree in the given window requires it to
+" be split, 1 otherwise
+"
+" Args:
+" winnumber: the number of the window in question
+function! s:Opener._isWindowUsable(winnumber)
+    "gotta split if theres only one window (i.e. the NERD tree)
+    if winnr('$') ==# 1
+        return 0
+    endif
+
+    let oldwinnr = winnr()
+    call nerdtree#exec(a:winnumber . 'wincmd p', 1)
+    let specialWindow = getbufvar('%', '&buftype') !=# '' || getwinvar('%', '&previewwindow')
+    let modified = &modified
+    call nerdtree#exec(oldwinnr . 'wincmd p', 1)
+
+    "if its a special window e.g. quickfix or another explorer plugin then we
+    "have to split
+    if specialWindow
+        return 0
+    endif
+
+    if &hidden
+        return 1
+    endif
+
+    return !modified || self._bufInWindows(winbufnr(a:winnumber)) >= 2
+endfunction
+
+" FUNCTION: Opener.New(path, opts) {{{1
+" Instantiate a new NERDTreeOpener object.
+" Args:
+" a:path: the path object that is to be opened
+" a:opts: a dictionary containing the following optional keys...
+"   'where': specifies whether the node should be opened in new split, in
+"            a new tab or, in the last window; takes values 'v', 'h', or 't'
+"   'reuse': if file is already shown in a window, jump there; takes values
+"            'all', 'currenttab', or empty
+"   'keepopen': boolean (0 or 1); if true, the tree window will not be closed
+"   'stay': boolean (0 or 1); if true, remain in tree window after opening
+function! s:Opener.New(path, opts)
+    let l:newOpener = copy(self)
+
+    let l:newOpener._keepopen = nerdtree#has_opt(a:opts, 'keepopen')
+    let l:newOpener._nerdtree = b:NERDTree
+    let l:newOpener._path = a:path
+    let l:newOpener._reuse = has_key(a:opts, 'reuse') ? a:opts['reuse'] : ''
+    let l:newOpener._stay = nerdtree#has_opt(a:opts, 'stay')
+    let l:newOpener._where = has_key(a:opts, 'where') ? a:opts['where'] : ''
+
+    call l:newOpener._saveCursorPos()
+
+    return l:newOpener
+endfunction
+
+" FUNCTION: Opener._newSplit() {{{1
+function! s:Opener._newSplit()
+    let onlyOneWin = (winnr('$') ==# 1)
+    let savesplitright = &splitright
+    if onlyOneWin
+        let &splitright = (g:NERDTreeWinPos ==# 'left')
+    endif
+    " If only one window (ie. NERDTree), split vertically instead.
+    let splitMode = onlyOneWin ? 'vertical' : ''
+
+    " Open the new window
+    try
+        call nerdtree#exec('wincmd p', 1)
+        call nerdtree#exec(splitMode . ' split',1)
+    catch /^Vim\%((\a\+)\)\=:E37/
+        call g:NERDTree.CursorToTreeWin()
+        throw 'NERDTree.FileAlreadyOpenAndModifiedError: '. self._path.str() .' is already open and modified.'
+    catch /^Vim\%((\a\+)\)\=:/
+        "do nothing
+    endtry
+
+    "resize the tree window if no other window was open before
+    if onlyOneWin
+        call nerdtree#exec('wincmd p', 1)
+        call nerdtree#exec('silent '. splitMode .' resize '. g:NERDTreeWinSize, 1)
+        call nerdtree#exec('wincmd p', 0)
+    endif
+
+    let &splitright=savesplitright
+endfunction
+
+" FUNCTION: Opener._newVSplit() {{{1
+function! s:Opener._newVSplit()
+    let l:winwidth = winwidth('.')
+
+    let onlyOneWin = (winnr('$') ==# 1)
+    let savesplitright = &splitright
+    if onlyOneWin
+        let &splitright = (g:NERDTreeWinPos ==# 'left')
+        let l:winwidth = g:NERDTreeWinSize
+    endif
+
+    call nerdtree#exec('wincmd p', 1)
+    call nerdtree#exec('vsplit', 1)
+
+    let l:currentWindowNumber = winnr()
+
+    " Restore the NERDTree to its original width.
+    call g:NERDTree.CursorToTreeWin()
+    execute 'silent vertical resize ' . l:winwidth
+
+    call nerdtree#exec(l:currentWindowNumber . 'wincmd w', 0)
+    let &splitright=savesplitright
+endfunction
+
+" FUNCTION: Opener.open(target) {{{1
+function! s:Opener.open(target)
+    if self._path.isDirectory
+        call self._openDirectory(a:target)
+        return
+    endif
+
+    call self._openFile()
+endfunction
+
+" FUNCTION: Opener._openFile() {{{1
+function! s:Opener._openFile()
+    if !self._stay && self._keepopen && get(b:, 'NERDTreeZoomed', 0)
+        call b:NERDTree.ui.toggleZoom()
+    endif
+
+    if self._reuseWindow()
+        return
+    endif
+
+    call self._gotoTargetWin()
+
+    if self._stay
+        silent call self._path.edit()
+        call self._restoreCursorPos()
+        return
+    endif
+
+    call self._path.edit()
+endfunction
+
+" FUNCTION: Opener._openDirectory(node) {{{1
+function! s:Opener._openDirectory(node)
+    call self._gotoTargetWin()
+
+    if self._nerdtree.isWinTree()
+        call g:NERDTreeCreator.CreateWindowTree(a:node.path.str())
+    else
+        if empty(self._where)
+            call b:NERDTree.changeRoot(a:node)
+        elseif self._where ==# 't'
+            call g:NERDTreeCreator.CreateTabTree(a:node.path.str())
+        else
+            call g:NERDTreeCreator.CreateWindowTree(a:node.path.str())
+        endif
+    endif
+
+    if self._stay
+        call self._restoreCursorPos()
+    endif
+endfunction
+
+" FUNCTION: Opener._previousWindow() {{{1
+function! s:Opener._previousWindow()
+    if !self._isWindowUsable(winnr('#')) && self._firstUsableWindow() ==# -1
+        call self._newSplit()
+    else
+        try
+            if !self._isWindowUsable(winnr('#'))
+                call nerdtree#exec(self._firstUsableWindow() . 'wincmd w', 1)
+            else
+                call nerdtree#exec('wincmd p', 1)
+            endif
+        catch /^Vim\%((\a\+)\)\=:E37/
+            call g:NERDTree.CursorToTreeWin()
+            throw 'NERDTree.FileAlreadyOpenAndModifiedError: '. self._path.str() .' is already open and modified.'
+        catch /^Vim\%((\a\+)\)\=:/
+            echo v:exception
+        endtry
+    endif
+endfunction
+
+" FUNCTION: Opener._restoreCursorPos() {{{1
+function! s:Opener._restoreCursorPos()
+    call nerdtree#exec(self._tabnr . 'tabnext', 1)
+    call nerdtree#exec(bufwinnr(self._bufnr) . 'wincmd w', 1)
+endfunction
+
+" FUNCTION: Opener._reuseWindow() {{{1
+" put the cursor in the first window we find for this file
+"
+" return 1 if we were successful
+function! s:Opener._reuseWindow()
+    if empty(self._reuse)
+        return 0
+    endif
+
+    "check the current tab for the window
+    let winnr = bufwinnr('^' . self._path.str() . '$')
+    if winnr !=# -1
+        call nerdtree#exec(winnr . 'wincmd w', 0)
+        call self._checkToCloseTree(0)
+        return 1
+    endif
+
+    if self._reuse ==# 'currenttab'
+        return 0
+    endif
+
+    "check other tabs
+    let tabnr = self._path.tabnr()
+    if tabnr
+        call self._checkToCloseTree(1)
+        call nerdtree#exec(tabnr . 'tabnext', 1)
+        let winnr = bufwinnr('^' . self._path.str() . '$')
+        call nerdtree#exec(winnr . 'wincmd w', 0)
+        return 1
+    endif
+
+    return 0
+endfunction
+
+" FUNCTION: Opener._saveCursorPos() {{{1
+function! s:Opener._saveCursorPos()
+    let self._bufnr = bufnr('')
+    let self._tabnr = tabpagenr()
+endfunction
+
+" vim: set sw=4 sts=4 et fdm=marker:

lib/nerdtree/path.vim

@@ -0,0 +1,867 @@
+" ============================================================================
+" CLASS: Path
+"
+" The Path class provides an abstracted representation of a file system
+" pathname.  Various operations on pathnames are provided and a number of
+" representations of a given path name can be accessed here.
+" ============================================================================
+
+
+let s:Path = {}
+let g:NERDTreePath = s:Path
+
+" FUNCTION: Path.AbsolutePathFor(pathStr) {{{1
+function! s:Path.AbsolutePathFor(pathStr)
+    let l:prependWorkingDir = 0
+
+    if nerdtree#runningWindows()
+        let l:prependWorkingDir = a:pathStr !~# '^.:\(\\\|\/\)\?' && a:pathStr !~# '^\(\\\\\|\/\/\)'
+    else
+        let l:prependWorkingDir = a:pathStr !~# '^/'
+    endif
+
+    let l:result = a:pathStr
+
+    if l:prependWorkingDir
+        let l:result = getcwd()
+
+        if l:result[-1:] == nerdtree#slash()
+            let l:result = l:result . a:pathStr
+        else
+            let l:result = l:result . nerdtree#slash() . a:pathStr
+        endif
+    endif
+
+    return l:result
+endfunction
+
+" FUNCTION: Path.bookmarkNames() {{{1
+function! s:Path.bookmarkNames()
+    if !exists('self._bookmarkNames')
+        call self.cacheDisplayString()
+    endif
+    return self._bookmarkNames
+endfunction
+
+" FUNCTION: Path.cacheDisplayString() {{{1
+function! s:Path.cacheDisplayString() abort
+    let self.cachedDisplayString = g:NERDTreeNodeDelimiter . self.getLastPathComponent(1)
+
+    if self.isExecutable
+        let self.cachedDisplayString = self.addDelimiter(self.cachedDisplayString) . '*'
+    endif
+
+    let self._bookmarkNames = []
+    for i in g:NERDTreeBookmark.Bookmarks()
+        if i.path.equals(self)
+            call add(self._bookmarkNames, i.name)
+        endif
+    endfor
+    if !empty(self._bookmarkNames) && g:NERDTreeMarkBookmarks ==# 1
+        let self.cachedDisplayString = self.addDelimiter(self.cachedDisplayString) . ' {' . join(self._bookmarkNames) . '}'
+    endif
+
+    if self.isSymLink
+        let self.cachedDisplayString = self.addDelimiter(self.cachedDisplayString) . ' -> ' . self.symLinkDest
+    endif
+
+    if !self.isDirectory && b:NERDTree.ui.getShowFileLines() != 0
+        let l:bufname = self.str({'format': 'Edit'})
+        let l:lines = 0
+        if executable('wc') 
+            let l:lines = split(system('wc -l "'.l:bufname.'"'))[0]
+        elseif nerdtree#runningWindows()
+            let l:lines = substitute(system('type "'.l:bufname.'" | find /c /v ""'), '\n', '', 'g')
+        else 
+            let s:lines = readfile(l:bufname)
+            let l:lines = 0
+            for s:line in s:lines
+                let l:lines += 1
+                if l:lines >= 20000 
+                    break
+                endif
+            endfor
+        endif
+        let self.cachedDisplayString = self.addDelimiter(self.cachedDisplayString) . ' ('.l:lines.')'
+    endif
+    if self.isReadOnly
+        let self.cachedDisplayString = self.addDelimiter(self.cachedDisplayString) . ' ['.g:NERDTreeGlyphReadOnly.']'
+    endif
+endfunction
+
+" FUNCTION: Path.addDelimiter() {{{1
+function! s:Path.addDelimiter(line)
+    if a:line =~# '\(.*' . g:NERDTreeNodeDelimiter . '\)\{2}'
+        return a:line
+    else
+        return a:line . g:NERDTreeNodeDelimiter
+    endif
+endfunction
+
+" FUNCTION: Path.changeToDir() {{{1
+function! s:Path.changeToDir()
+    let dir = self.str({'format': 'Cd'})
+    if self.isDirectory ==# 0
+        let dir = self.getParent().str({'format': 'Cd'})
+    endif
+
+    try
+        if g:NERDTreeUseTCD && exists(':tcd') ==# 2
+            execute 'tcd ' . dir
+            call nerdtree#echo("Tab's CWD is now: " . getcwd())
+        else
+            execute 'cd ' . dir
+            call nerdtree#echo('CWD is now: ' . getcwd())
+        endif
+    catch
+        throw 'NERDTree.PathChangeError: cannot change CWD to ' . dir
+    endtry
+endfunction
+
+" FUNCTION: Path.Create(fullpath) {{{1
+"
+" Factory method.
+"
+" Creates a path object with the given path. The path is also created on the
+" filesystem. If the path already exists, a NERDTree.Path.Exists exception is
+" thrown. If any other errors occur, a NERDTree.Path exception is thrown.
+"
+" Args:
+" fullpath: the full filesystem path to the file/dir to create
+function! s:Path.Create(fullpath)
+    "bail if the a:fullpath already exists
+    if isdirectory(a:fullpath) || filereadable(a:fullpath)
+        throw "NERDTree.CreatePathError: Directory Exists: '" . a:fullpath . "'"
+    endif
+
+    try
+
+        "if it ends with a slash, assume its a dir create it
+        if a:fullpath =~# '\(\\\|\/\)$'
+            "whack the trailing slash off the end if it exists
+            let fullpath = substitute(a:fullpath, '\(\\\|\/\)$', '', '')
+
+            call mkdir(fullpath, 'p')
+
+        "assume its a file and create
+        else
+            call s:Path.createParentDirectories(a:fullpath)
+            call writefile([], a:fullpath)
+        endif
+    catch
+        throw "NERDTree.CreatePathError: Could not create path: '" . a:fullpath . "'"
+    endtry
+
+    return s:Path.New(a:fullpath)
+endfunction
+
+" FUNCTION: Path.copy(dest) {{{1
+"
+" Copies the file/dir represented by this Path to the given location
+"
+" Args:
+" dest: the location to copy this dir/file to
+function! s:Path.copy(dest)
+    if !s:Path.CopyingSupported()
+        throw 'NERDTree.CopyingNotSupportedError: Copying is not supported on this OS'
+    endif
+
+    call s:Path.createParentDirectories(a:dest)
+
+    if exists('g:NERDTreeCopyCmd')
+        let cmd_prefix = g:NERDTreeCopyCmd
+    else
+        let cmd_prefix = (self.isDirectory ? g:NERDTreeCopyDirCmd : g:NERDTreeCopyFileCmd)
+    endif
+
+    let cmd = cmd_prefix . ' ' . shellescape(self.str()) . ' ' . shellescape(a:dest)
+    let success = system(cmd)
+    if v:shell_error !=# 0
+        throw "NERDTree.CopyError: Could not copy '". self.str() ."' to: '" . a:dest . "'"
+    endif
+endfunction
+
+" FUNCTION: Path.CopyingSupported() {{{1
+"
+" returns 1 if copying is supported for this OS
+function! s:Path.CopyingSupported()
+    return exists('g:NERDTreeCopyCmd') || (exists('g:NERDTreeCopyDirCmd') && exists('g:NERDTreeCopyFileCmd'))
+endfunction
+
+" FUNCTION: Path.copyingWillOverwrite(dest) {{{1
+"
+" returns 1 if copy this path to the given location will cause files to
+" overwritten
+"
+" Args:
+" dest: the location this path will be copied to
+function! s:Path.copyingWillOverwrite(dest)
+    if filereadable(a:dest)
+        return 1
+    endif
+
+    if isdirectory(a:dest)
+        let path = s:Path.JoinPathStrings(a:dest, self.getLastPathComponent(0))
+        if filereadable(path)
+            return 1
+        endif
+    endif
+endfunction
+
+" FUNCTION: Path.createParentDirectories(path) {{{1
+"
+" create parent directories for this path if needed
+" without throwing any errors if those directories already exist
+"
+" Args:
+" path: full path of the node whose parent directories may need to be created
+function! s:Path.createParentDirectories(path)
+    let dir_path = fnamemodify(a:path, ':h')
+    if !isdirectory(dir_path)
+        call mkdir(dir_path, 'p')
+    endif
+endfunction
+
+" FUNCTION: Path.delete() {{{1
+"
+" Deletes the file or directory represented by this path.
+"
+" Throws NERDTree.Path.Deletion exceptions
+function! s:Path.delete()
+    if self.isDirectory
+
+        let cmd = g:NERDTreeRemoveDirCmd . self.str({'escape': 1})
+        let success = system(cmd)
+
+        if v:shell_error !=# 0
+            throw "NERDTree.PathDeletionError: Could not delete directory: '" . self.str() . "'"
+        endif
+    else
+        if exists('g:NERDTreeRemoveFileCmd')
+            let cmd = g:NERDTreeRemoveFileCmd . self.str({'escape': 1})
+            let success = system(cmd)
+        else
+            let success = delete(self.str())
+        endif
+
+        if success !=# 0
+            throw "NERDTree.PathDeletionError: Could not delete file: '" . self.str() . "'"
+        endif
+    endif
+
+    "delete all bookmarks for this path
+    for i in self.bookmarkNames()
+        let bookmark = g:NERDTreeBookmark.BookmarkFor(i)
+        call bookmark.delete()
+    endfor
+endfunction
+
+" FUNCTION: Path.displayString() {{{1
+"
+" Returns a string that specifies how the path should be represented as a
+" string
+function! s:Path.displayString()
+    if self.cachedDisplayString ==# ''
+        call self.cacheDisplayString()
+    endif
+
+    return self.cachedDisplayString
+endfunction
+
+" FUNCTION: Path.edit() {{{1
+function! s:Path.edit()
+    let l:bufname = self.str({'format': 'Edit'})
+    if bufname('%') !=# l:bufname
+        exec 'edit ' . l:bufname
+    endif
+endfunction
+
+" FUNCTION: Path.extractDriveLetter(fullpath) {{{1
+"
+" If running windows, cache the drive letter for this path
+function! s:Path.extractDriveLetter(fullpath)
+    if nerdtree#runningWindows()
+        if a:fullpath =~# '^\(\\\\\|\/\/\)'
+            "For network shares, the 'drive' consists of the first two parts of the path, i.e. \\boxname\share
+            let self.drive = substitute(a:fullpath, '^\(\(\\\\\|\/\/\)[^\\\/]*\(\\\|\/\)[^\\\/]*\).*', '\1', '')
+            let self.drive = substitute(self.drive, '/', '\', 'g')
+        else
+            let self.drive = substitute(a:fullpath, '\(^[a-zA-Z]:\).*', '\1', '')
+        endif
+    else
+        let self.drive = ''
+    endif
+
+endfunction
+
+" FUNCTION: Path.exists() {{{1
+" return 1 if this path points to a location that is readable or is a directory
+function! s:Path.exists()
+    let p = self.str()
+    return filereadable(p) || isdirectory(p)
+endfunction
+
+" FUNCTION: Path._escChars() {{{1
+function! s:Path._escChars()
+    if nerdtree#runningWindows()
+        return " `\|\"#%&,?()\*^<>$"
+    endif
+
+    return " \\`\|\"#%&,?()\*^<>[]{}$"
+endfunction
+
+" FUNCTION: Path.getDir() {{{1
+"
+" Returns this path if it is a directory, else this paths parent.
+"
+" Return:
+" a Path object
+function! s:Path.getDir()
+    if self.isDirectory
+        return self
+    else
+        return self.getParent()
+    endif
+endfunction
+
+" FUNCTION: Path.getParent() {{{1
+"
+" Returns a new path object for this paths parent
+"
+" Return:
+" a new Path object
+function! s:Path.getParent()
+    if nerdtree#runningWindows()
+        let path = self.drive . '\' . join(self.pathSegments[0:-2], '\')
+    else
+        let path = '/'. join(self.pathSegments[0:-2], '/')
+    endif
+
+    return s:Path.New(path)
+endfunction
+
+" FUNCTION: Path.getLastPathComponent(dirSlash) {{{1
+"
+" Gets the last part of this path.
+"
+" Args:
+" dirSlash: if 1 then a trailing slash will be added to the returned value for
+" directory nodes.
+function! s:Path.getLastPathComponent(dirSlash)
+    if empty(self.pathSegments)
+        return ''
+    endif
+    let toReturn = self.pathSegments[-1]
+    if a:dirSlash && self.isDirectory
+        let toReturn = toReturn . '/'
+    endif
+    return toReturn
+endfunction
+
+" FUNCTION: Path.getSortOrderIndex() {{{1
+" returns the index of the pattern in g:NERDTreeSortOrder that this path matches
+function! s:Path.getSortOrderIndex()
+    let i = 0
+    while i < len(g:NERDTreeSortOrder)
+        if g:NERDTreeSortOrder[i] !~? '\[\[-\?\(timestamp\|size\|extension\)\]\]' &&
+        \ self.getLastPathComponent(1) =~# g:NERDTreeSortOrder[i]
+            return i
+        endif
+        let i = i + 1
+    endwhile
+
+    return index(g:NERDTreeSortOrder, '*')
+endfunction
+
+" FUNCTION: Path._splitChunks(path) {{{1
+" returns a list of path chunks
+function! s:Path._splitChunks(path)
+    let chunks = split(a:path, '\(\D\+\|\d\+\)\zs')
+    let i = 0
+    while i < len(chunks)
+        "convert number literals to numbers
+        if match(chunks[i], '^\d\+$') ==# 0
+            let chunks[i] = str2nr(chunks[i])
+        endif
+        let i = i + 1
+    endwhile
+    return chunks
+endfunction
+
+" FUNCTION: Path.getSortKey() {{{1
+" returns a key used in compare function for sorting
+function! s:Path.getSortKey()
+    if !exists('self._sortKey') || g:NERDTreeSortOrder !=# g:NERDTreeOldSortOrder
+        " Look for file metadata tags: [[timestamp]], [[extension]], [[size]]
+        let metadata = []
+        for tag in g:NERDTreeSortOrder
+            if tag =~? '\[\[-\?timestamp\]\]'
+                let metadata += [self.isDirectory ? 0 : getftime(self.str()) * (tag =~# '-' ? -1 : 1)]
+            elseif tag =~? '\[\[-\?size\]\]'
+                let metadata += [self.isDirectory ? 0 : getfsize(self.str()) * (tag =~# '-' ? -1 : 1)]
+            elseif tag =~? '\[\[extension\]\]'
+                let extension = matchstr(self.getLastPathComponent(0), '[^.]\+\.\zs[^.]\+$')
+                let metadata += [self.isDirectory ? '' : (extension ==# '' ? nr2char(str2nr('0x10ffff',16)) : extension)]
+            endif
+        endfor
+
+        if g:NERDTreeSortOrder[0] =~# '\[\[.*\]\]'
+            " Apply tags' sorting first if specified first.
+            let self._sortKey = metadata + [self.getSortOrderIndex()]
+        else
+            " Otherwise, do regex grouping first.
+            let self._sortKey = [self.getSortOrderIndex()] + metadata
+        endif
+
+        let path = self.getLastPathComponent(0)
+        if !g:NERDTreeSortHiddenFirst
+            let path = substitute(path, '^[._]', '', '')
+        endif
+        if !g:NERDTreeCaseSensitiveSort
+            let path = tolower(path)
+        endif
+
+        call extend(self._sortKey, (g:NERDTreeNaturalSort ? self._splitChunks(path) : [path]))
+    endif
+    return self._sortKey
+endfunction
+
+" FUNCTION: Path.isHiddenUnder(path) {{{1
+function! s:Path.isHiddenUnder(path)
+
+    if !self.isUnder(a:path)
+        return 0
+    endif
+
+    let l:startIndex = len(a:path.pathSegments)
+    let l:segments = self.pathSegments[l:startIndex : ]
+
+    for l:segment in l:segments
+
+        if l:segment =~# '^\.'
+            return 1
+        endif
+    endfor
+
+    return 0
+endfunction
+
+" FUNCTION: Path.isUnixHiddenFile() {{{1
+" check for unix hidden files
+function! s:Path.isUnixHiddenFile()
+    return self.getLastPathComponent(0) =~# '^\.'
+endfunction
+
+" FUNCTION: Path.isUnixHiddenPath() {{{1
+" check for unix path with hidden components
+function! s:Path.isUnixHiddenPath()
+    if self.getLastPathComponent(0) =~# '^\.'
+        return 1
+    else
+        for segment in self.pathSegments
+            if segment =~# '^\.'
+                return 1
+            endif
+        endfor
+        return 0
+    endif
+endfunction
+
+" FUNCTION: Path.ignore(nerdtree) {{{1
+" returns true if this path should be ignored
+function! s:Path.ignore(nerdtree)
+    "filter out the user specified paths to ignore
+    if a:nerdtree.ui.isIgnoreFilterEnabled()
+        for i in g:NERDTreeIgnore
+            if self._ignorePatternMatches(i)
+                return 1
+            endif
+        endfor
+
+        for l:Callback in g:NERDTree.PathFilters()
+            let l:Callback = type(l:Callback) ==# type(function('tr')) ? l:Callback : function(l:Callback)
+            if l:Callback({'path': self, 'nerdtree': a:nerdtree})
+               return 1
+            endif
+        endfor
+    endif
+
+    "dont show hidden files unless instructed to
+    if !a:nerdtree.ui.getShowHidden() && self.isUnixHiddenFile()
+        return 1
+    endif
+
+    if a:nerdtree.ui.getShowFiles() ==# 0 && self.isDirectory ==# 0
+        return 1
+    endif
+
+    return 0
+endfunction
+
+" FUNCTION: Path._ignorePatternMatches(pattern) {{{1
+" returns true if this path matches the given ignore pattern
+function! s:Path._ignorePatternMatches(pattern)
+    let pat = a:pattern
+    if strpart(pat,len(pat)-8) ==# '[[path]]'
+        let pat = strpart(pat,0, len(pat)-8)
+        return self.str() =~# pat
+    elseif strpart(pat,len(pat)-7) ==# '[[dir]]'
+        if !self.isDirectory
+            return 0
+        endif
+        let pat = strpart(pat,0, len(pat)-7)
+    elseif strpart(pat,len(pat)-8) ==# '[[file]]'
+        if self.isDirectory
+            return 0
+        endif
+        let pat = strpart(pat,0, len(pat)-8)
+    endif
+
+    return self.getLastPathComponent(0) =~# pat
+endfunction
+
+" FUNCTION: Path.isAncestor(path) {{{1
+" return 1 if this path is somewhere above the given path in the filesystem.
+"
+" a:path should be a dir
+function! s:Path.isAncestor(child)
+    return a:child.isUnder(self)
+endfunction
+
+" FUNCTION: Path.isUnder(path) {{{1
+" return 1 if this path is somewhere under the given path in the filesystem.
+function! s:Path.isUnder(parent)
+    if a:parent.isDirectory ==# 0
+        return 0
+    endif
+    if nerdtree#runningWindows() && a:parent.drive !=# self.drive
+        return 0
+    endif
+    let l:this_count = len(self.pathSegments)
+    if l:this_count ==# 0
+        return 0
+    endif
+    let l:that_count = len(a:parent.pathSegments)
+    if l:that_count ==# 0
+        return 1
+    endif
+    if l:that_count >= l:this_count
+        return 0
+    endif
+    for i in range(0, l:that_count-1)
+        if !nerdtree#pathEquals(self.pathSegments[i], a:parent.pathSegments[i])
+            return 0
+        endif
+    endfor
+    return 1
+endfunction
+
+" FUNCTION: Path.JoinPathStrings(...) {{{1
+function! s:Path.JoinPathStrings(...)
+    let components = []
+    for i in a:000
+        let components = extend(components, split(i, '/'))
+    endfor
+    return '/' . join(components, '/')
+endfunction
+
+" FUNCTION: Path.equals() {{{1
+"
+" Determines whether 2 path objects are "equal".
+" They are equal if the paths they represent are the same
+"
+" Args:
+" path: the other path obj to compare this with
+function! s:Path.equals(path)
+    return nerdtree#pathEquals(self.str(), a:path.str())
+endfunction
+
+" FUNCTION: Path.New(pathStr) {{{1
+function! s:Path.New(pathStr)
+    let l:newPath = copy(self)
+
+    call l:newPath.readInfoFromDisk(s:Path.AbsolutePathFor(a:pathStr))
+
+    let l:newPath.cachedDisplayString = ''
+    let l:newPath.flagSet = g:NERDTreeFlagSet.New()
+
+    return l:newPath
+endfunction
+
+" FUNCTION: Path.Resolve() {{{1
+" Invoke the vim resolve() function and return the result
+" This is necessary because in some versions of vim resolve() removes trailing
+" slashes while in other versions it doesn't.  This always removes the trailing
+" slash
+function! s:Path.Resolve(path)
+    let tmp = resolve(a:path)
+    return tmp =~# '.\+/$' ? substitute(tmp, '/$', '', '') : tmp
+endfunction
+
+" FUNCTION: Path.readInfoFromDisk(fullpath) {{{1
+"
+"
+" Throws NERDTree.Path.InvalidArguments exception.
+function! s:Path.readInfoFromDisk(fullpath)
+    call self.extractDriveLetter(a:fullpath)
+
+    let fullpath = s:Path.WinToUnixPath(a:fullpath)
+
+    if getftype(fullpath) ==# 'fifo'
+        throw 'NERDTree.InvalidFiletypeError: Cant handle FIFO files: ' . a:fullpath
+    endif
+
+    let self.pathSegments = filter(split(fullpath, '/'), '!empty(v:val)')
+
+    let self.isReadOnly = 0
+    if isdirectory(a:fullpath)
+        let self.isDirectory = 1
+    elseif filereadable(a:fullpath)
+        let self.isDirectory = 0
+        let self.isReadOnly = filewritable(a:fullpath) ==# 0
+    else
+        throw 'NERDTree.InvalidArgumentsError: Invalid path = ' . a:fullpath
+    endif
+
+    let self.isExecutable = 0
+    if !self.isDirectory
+        let self.isExecutable = getfperm(a:fullpath) =~# 'x'
+    endif
+
+    "grab the last part of the path (minus the trailing slash)
+    let lastPathComponent = self.getLastPathComponent(0)
+
+    "get the path to the new node with the parent dir fully resolved
+    let hardPath = s:Path.Resolve(self.strTrunk()) . '/' . lastPathComponent
+
+    "if  the last part of the path is a symlink then flag it as such
+    let self.isSymLink = (s:Path.Resolve(hardPath) !=# hardPath)
+    if self.isSymLink
+        let self.symLinkDest = s:Path.Resolve(fullpath)
+
+        "if the link is a dir then slap a / on the end of its dest
+        if isdirectory(self.symLinkDest)
+
+            "we always wanna treat MS windows shortcuts as files for
+            "simplicity
+            if hardPath !~# '\.lnk$'
+
+                let self.symLinkDest = self.symLinkDest . '/'
+            endif
+        endif
+    endif
+endfunction
+
+" FUNCTION: Path.refresh(nerdtree) {{{1
+function! s:Path.refresh(nerdtree)
+    call self.readInfoFromDisk(self.str())
+    call g:NERDTreePathNotifier.NotifyListeners('refresh', self, a:nerdtree, {})
+    call self.cacheDisplayString()
+endfunction
+
+" FUNCTION: Path.refreshFlags(nerdtree) {{{1
+function! s:Path.refreshFlags(nerdtree)
+    call g:NERDTreePathNotifier.NotifyListeners('refreshFlags', self, a:nerdtree, {})
+    call self.cacheDisplayString()
+endfunction
+
+" FUNCTION: Path.rename() {{{1
+"
+" Renames this node on the filesystem
+function! s:Path.rename(newPath)
+    if a:newPath ==# ''
+        throw 'NERDTree.InvalidArgumentsError: Invalid newPath for renaming = '. a:newPath
+    endif
+
+    call s:Path.createParentDirectories(a:newPath)
+
+    let success =  rename(self.str(), a:newPath)
+    if success !=# 0
+        throw "NERDTree.PathRenameError: Could not rename: '" . self.str() . "'" . 'to:' . a:newPath
+    endif
+    call self.readInfoFromDisk(a:newPath)
+
+    for i in self.bookmarkNames()
+        let b = g:NERDTreeBookmark.BookmarkFor(i)
+        call b.setPath(copy(self))
+    endfor
+    call g:NERDTreeBookmark.Write()
+endfunction
+
+" FUNCTION: Path.str() {{{1
+" Return a string representation of this Path object.
+"
+" Args:
+" This function takes a single dictionary (optional) with keys and values that
+" specify how the returned pathname should be formatted.
+"
+" The dictionary may have the following keys:
+"  'format'
+"  'escape'
+"  'truncateTo'
+"
+" The 'format' key may have a value of:
+"  'Cd' - a string to be used with ":cd" and similar commands
+"  'Edit' - a string to be used with ":edit" and similar commands
+"  'UI' - a string to be displayed in the NERDTree user interface
+"
+" The 'escape' key, if specified, will cause the output to be escaped with
+" Vim's internal "shellescape()" function.
+"
+" The 'truncateTo' key shortens the length of the path to that given by the
+" value associated with 'truncateTo'. A '<' is prepended.
+function! s:Path.str(...)
+    let options = a:0 ? a:1 : {}
+    let toReturn = ''
+
+    if has_key(options, 'format')
+        let format = options['format']
+        if has_key(self, '_strFor' . format)
+            exec 'let toReturn = self._strFor' . format . '()'
+        else
+            throw 'NERDTree.UnknownFormatError: unknown format "'. format .'"'
+        endif
+    else
+        let toReturn = self._str()
+    endif
+
+    if nerdtree#has_opt(options, 'escape')
+        let toReturn = shellescape(toReturn)
+    endif
+
+    if has_key(options, 'truncateTo')
+        let limit = options['truncateTo']
+        if strdisplaywidth(toReturn) > limit-1
+            while strdisplaywidth(toReturn) > limit-1 && strchars(toReturn) > 0
+                let toReturn = substitute(toReturn, '^.', '', '')
+            endwhile
+            if len(split(toReturn, '/')) > 1
+                let toReturn = '</' . join(split(toReturn, '/')[1:], '/') . '/'
+            else
+                let toReturn = '<' . toReturn
+            endif
+        endif
+    endif
+
+    return toReturn
+endfunction
+
+" FUNCTION: Path._strForUI() {{{1
+function! s:Path._strForUI()
+    let toReturn = '/' . join(self.pathSegments, '/')
+    if self.isDirectory && toReturn !=# '/'
+        let toReturn  = toReturn . '/'
+    endif
+    return toReturn
+endfunction
+
+" FUNCTION: Path._strForCd() {{{1
+" Return a string representation of this Path that is suitable for use as an
+" argument to Vim's internal ":cd" command.
+function! s:Path._strForCd()
+    return fnameescape(self.str())
+endfunction
+
+" FUNCTION: Path._strForEdit() {{{1
+" Return a string representation of this Path that is suitable for use as an
+" argument to Vim's internal ":edit" command.
+function! s:Path._strForEdit()
+
+    " Make the path relative to the current working directory, if possible.
+    let l:result = fnamemodify(self.str(), ':.')
+
+    " On Windows, the drive letter may be removed by "fnamemodify()".  Add it
+    " back, if necessary.
+    if nerdtree#runningWindows() && l:result[0] == nerdtree#slash()
+        let l:result = self.drive . l:result
+    endif
+
+    let l:result = fnameescape(l:result)
+
+    if empty(l:result)
+        let l:result = '.'
+    endif
+
+    return l:result
+endfunction
+
+" FUNCTION: Path._strForGlob() {{{1
+function! s:Path._strForGlob()
+    let lead = nerdtree#slash()
+
+    "if we are running windows then slap a drive letter on the front
+    if nerdtree#runningWindows()
+        let lead = self.drive . '\'
+    endif
+
+    let toReturn = lead . join(self.pathSegments, nerdtree#slash())
+
+    if !nerdtree#runningWindows()
+        let toReturn = escape(toReturn, self._escChars())
+    endif
+    return toReturn
+endfunction
+
+" FUNCTION: Path._str() {{{1
+" Return the absolute pathname associated with this Path object.  The pathname
+" returned is appropriate for the underlying file system.
+function! s:Path._str()
+    let l:separator = nerdtree#slash()
+    let l:leader = l:separator
+
+    if nerdtree#runningWindows()
+        let l:leader = self.drive . l:separator
+    endif
+
+    return l:leader . join(self.pathSegments, l:separator)
+endfunction
+
+" FUNCTION: Path.strTrunk() {{{1
+" Gets the path without the last segment on the end.
+function! s:Path.strTrunk()
+    return self.drive . '/' . join(self.pathSegments[0:-2], '/')
+endfunction
+
+" FUNCTION: Path.tabnr() {{{1
+" return the number of the first tab that is displaying this file
+"
+" return 0 if no tab was found
+function! s:Path.tabnr()
+    let str = self.str()
+    for t in range(tabpagenr('$'))
+        for b in tabpagebuflist(t+1)
+            if str ==# expand('#' . b . ':p')
+                return t+1
+            endif
+        endfor
+    endfor
+    return 0
+endfunction
+
+" FUNCTION: Path.WinToUnixPath(pathstr){{{1
+" Takes in a windows path and returns the unix equiv
+"
+" A class level method
+"
+" Args:
+" pathstr: the windows path to convert
+function! s:Path.WinToUnixPath(pathstr)
+    if !nerdtree#runningWindows()
+        return a:pathstr
+    endif
+
+    let toReturn = a:pathstr
+
+    "remove the x:\ of the front
+    let toReturn = substitute(toReturn, '^.*:\(\\\|/\)\?', '/', '')
+
+    "remove the \\ network share from the front
+    let toReturn = substitute(toReturn, '^\(\\\\\|\/\/\)[^\\\/]*\(\\\|\/\)[^\\\/]*\(\\\|\/\)\?', '/', '')
+
+    "convert all \ chars to /
+    let toReturn = substitute(toReturn, '\', '/', 'g')
+
+    return toReturn
+endfunction
+
+" vim: set sw=4 sts=4 et fdm=marker:

lib/nerdtree/tree_dir_node.vim

@@ -0,0 +1,720 @@
+" ============================================================================
+" CLASS: TreeDirNode
+"
+" A subclass of NERDTreeFileNode.
+"
+" The 'composite' part of the file/dir composite.
+" ============================================================================
+
+
+let s:TreeDirNode = copy(g:NERDTreeFileNode)
+let g:NERDTreeDirNode = s:TreeDirNode
+
+" FUNCTION: TreeDirNode.AbsoluteTreeRoot(){{{1
+" Class method that returns the highest cached ancestor of the current root.
+function! s:TreeDirNode.AbsoluteTreeRoot()
+    let currentNode = b:NERDTree.root
+    while currentNode.parent !=# {}
+        let currentNode = currentNode.parent
+    endwhile
+    return currentNode
+endfunction
+
+" FUNCTION: TreeDirNode.activate([options]) {{{1
+function! s:TreeDirNode.activate(...)
+    let l:options = (a:0 > 0) ? a:1 : {}
+
+    call self.toggleOpen(l:options)
+
+    " Note that we only re-render the NERDTree for this node if we did NOT
+    " create a new node and render it in a new window or tab.  In the latter
+    " case, rendering the NERDTree for this node could overwrite the text of
+    " the new NERDTree!
+    if !has_key(l:options, 'where') || empty(l:options['where'])
+        call self.getNerdtree().render()
+        call self.putCursorHere(0, 0)
+    endif
+endfunction
+
+" FUNCTION: TreeDirNode.addChild(treenode, inOrder) {{{1
+" Adds the given treenode to the list of children for this node
+"
+" Args:
+" -treenode: the node to add
+" -inOrder: 1 if the new node should be inserted in sorted order
+function! s:TreeDirNode.addChild(treenode, inOrder)
+    call add(self.children, a:treenode)
+    let a:treenode.parent = self
+
+    if a:inOrder
+        call self.sortChildren()
+    endif
+endfunction
+
+" FUNCTION: TreeDirNode.close() {{{1
+" Mark this TreeDirNode as closed.
+function! s:TreeDirNode.close()
+
+    " Close all directories in this directory node's cascade. This is
+    " necessary to ensure consistency when cascades are rendered.
+    for l:dirNode in self.getCascade()
+        let l:dirNode.isOpen = 0
+    endfor
+endfunction
+
+" FUNCTION: TreeDirNode.closeChildren() {{{1
+" Recursively close any directory nodes that are descendants of this node.
+function! s:TreeDirNode.closeChildren()
+    for l:child in self.children
+        if l:child.path.isDirectory
+            call l:child.close()
+            call l:child.closeChildren()
+        endif
+    endfor
+endfunction
+
+" FUNCTION: TreeDirNode.createChild(path, inOrder) {{{1
+" Instantiates a new child node for this node with the given path. The new
+" nodes parent is set to this node.
+"
+" Args:
+" path: a Path object that this node will represent/contain
+" inOrder: 1 if the new node should be inserted in sorted order
+"
+" Returns:
+" the newly created node
+function! s:TreeDirNode.createChild(path, inOrder)
+    let newTreeNode = g:NERDTreeFileNode.New(a:path, self.getNerdtree())
+    call self.addChild(newTreeNode, a:inOrder)
+    return newTreeNode
+endfunction
+
+" FUNCTION: TreeDirNode.displayString() {{{1
+" Assemble and return a string that can represent this TreeDirNode object in
+" the NERDTree window.
+function! s:TreeDirNode.displayString()
+    let l:result = ''
+
+    " Build a label that identifies this TreeDirNode.
+    let l:label = ''
+    let l:cascade = self.getCascade()
+    for l:dirNode in l:cascade
+        let l:next = l:dirNode.path.displayString()
+        let l:label .= l:label ==# '' ? l:next : substitute(l:next,'^.','','')
+    endfor
+
+    " Select the appropriate open/closed status indicator symbol.
+    let l:symbol = (l:cascade[-1].isOpen ? g:NERDTreeDirArrowCollapsible : g:NERDTreeDirArrowExpandable )
+    let l:symbol .= (g:NERDTreeDirArrowExpandable ==# '' ? '' : ' ')
+    let l:flags = l:cascade[-1].path.flagSet.renderToString()
+
+    return l:symbol . l:flags . l:label
+endfunction
+
+" FUNCTION: TreeDirNode.findNode(path) {{{1
+" Will find one of the children (recursively) that has the given path
+"
+" Args:
+" path: a path object
+unlet s:TreeDirNode.findNode
+function! s:TreeDirNode.findNode(path)
+    if a:path.equals(self.path)
+        return self
+    endif
+    if nerdtree#caseSensitiveFS()
+        if stridx(a:path.str(), self.path.str(), 0) ==# -1
+            return {}
+        endif
+    else
+        if stridx(tolower(a:path.str()), tolower(self.path.str()), 0) ==# -1
+            return {}
+        endif
+    endif
+
+    if self.path.isDirectory
+        for i in self.children
+            let retVal = i.findNode(a:path)
+            if retVal !=# {}
+                return retVal
+            endif
+        endfor
+    endif
+    return {}
+endfunction
+
+" FUNCTION: TreeDirNode.getCascade() {{{1
+" Return an array of dir nodes (starting from self) that can be cascade opened.
+function! s:TreeDirNode.getCascade()
+    if !self.isCascadable()
+        return [self]
+    endif
+
+    let vc = self.getVisibleChildren()
+    let visChild = vc[0]
+
+    return [self] + visChild.getCascade()
+endfunction
+
+" FUNCTION: TreeDirNode.getCascadeRoot() {{{1
+" Return the first directory node in the cascade in which this directory node
+" is rendered.
+function! s:TreeDirNode.getCascadeRoot()
+
+    " Don't search above the current NERDTree root node.
+    if self.isRoot()
+        return self
+    endif
+
+    let l:cascadeRoot = self
+    let l:parent = self.parent
+
+    while !empty(l:parent) && !l:parent.isRoot()
+
+        if index(l:parent.getCascade(), self) ==# -1
+            break
+        endif
+
+        let l:cascadeRoot = l:parent
+        let l:parent = l:parent.parent
+    endwhile
+
+    return l:cascadeRoot
+endfunction
+
+" FUNCTION: TreeDirNode.getChildCount() {{{1
+" Returns the number of children this node has
+function! s:TreeDirNode.getChildCount()
+    return len(self.children)
+endfunction
+
+" FUNCTION: TreeDirNode.getChild(path) {{{1
+" Returns child node of this node that has the given path or {} if no such node
+" exists.
+"
+" This function doesnt not recurse into child dir nodes
+"
+" Args:
+" path: a path object
+function! s:TreeDirNode.getChild(path)
+    if stridx(a:path.str(), self.path.str(), 0) ==# -1
+        return {}
+    endif
+
+    let index = self.getChildIndex(a:path)
+    if index ==# -1
+        return {}
+    else
+        return self.children[index]
+    endif
+
+endfunction
+
+" FUNCTION: TreeDirNode.getChildByIndex(indx, visible) {{{1
+" returns the child at the given index
+"
+" Args:
+" indx: the index to get the child from
+" visible: 1 if only the visible children array should be used, 0 if all the
+" children should be searched.
+function! s:TreeDirNode.getChildByIndex(indx, visible)
+    let array_to_search = a:visible? self.getVisibleChildren() : self.children
+    if a:indx > len(array_to_search)
+        throw 'NERDTree.InvalidArgumentsError: Index is out of bounds.'
+    endif
+    return array_to_search[a:indx]
+endfunction
+
+" FUNCTION: TreeDirNode.getChildIndex(path) {{{1
+" Returns the index of the child node of this node that has the given path or
+" -1 if no such node exists.
+"
+" This function doesnt not recurse into child dir nodes
+"
+" Args:
+" path: a path object
+function! s:TreeDirNode.getChildIndex(path)
+    if stridx(a:path.str(), self.path.str(), 0) ==# -1
+        return -1
+    endif
+
+    "do a binary search for the child
+    let a = 0
+    let z = self.getChildCount()
+    while a < z
+        let mid = (a+z)/2
+        let diff = nerdtree#compareNodePaths(a:path, self.children[mid].path)
+
+        if diff ==# -1
+            let z = mid
+        elseif diff ==# 1
+            let a = mid+1
+        else
+            return mid
+        endif
+    endwhile
+    return -1
+endfunction
+
+" FUNCTION: TreeDirNode.getDirChildren() {{{1
+" Return a list of all child nodes from 'self.children' that are of type
+" TreeDirNode. This function supports http://github.com/scrooloose/nerdtree-project-plugin.git.
+function! s:TreeDirNode.getDirChildren()
+    return filter(copy(self.children), 'v:val.path.isDirectory ==# 1')
+endfunction
+
+" FUNCTION: TreeDirNode._glob(pattern, all) {{{1
+" Return a list of strings naming the descendants of the directory in this
+" TreeDirNode object that match the specified glob pattern.
+"
+" Args:
+" pattern: (string) the glob pattern to apply
+" all: (0 or 1) if 1, include '.' and '..' if they match 'pattern'; if 0,
+"      always exclude them
+"
+" Note: If the pathnames in the result list are below the working directory,
+" they are returned as pathnames relative to that directory. This is because
+" this function, internally, attempts to obey 'wildignore' rules that use
+" relative paths.
+function! s:TreeDirNode._glob(pattern, all)
+
+    " Construct a path specification such that globpath() will return
+    " relative pathnames, if possible.
+    if self.path.str() ==# getcwd()
+        let l:pathSpec = ','
+    else
+        let l:pathSpec = escape(fnamemodify(self.path.str({'format': 'Glob'}), ':.'), ',')
+
+        if nerdtree#runningWindows()
+            let l:pathSpec = substitute(l:pathSpec, "\\[\\(.*\\]\\)", "[[]\\1", "g")
+        endif
+
+        " On Windows, the drive letter may be removed by "fnamemodify()".
+        if nerdtree#runningWindows() && l:pathSpec[0] == nerdtree#slash()
+            let l:pathSpec = self.path.drive . l:pathSpec
+        endif
+    endif
+
+    let l:globList = []
+
+    " See ':h version7.txt' and ':h version8.txt' for details on the
+    " development of the glob() and globpath() functions.
+    if v:version > 704 || (v:version ==# 704 && has('patch654'))
+        let l:globList = globpath(l:pathSpec, a:pattern, !g:NERDTreeRespectWildIgnore, 1, 0)
+    elseif v:version ==# 704 && has('patch279')
+        let l:globList = globpath(l:pathSpec, a:pattern, !g:NERDTreeRespectWildIgnore, 1)
+    elseif v:version > 702 || (v:version ==# 702 && has('patch051'))
+        let l:globString = globpath(l:pathSpec, a:pattern, !g:NERDTreeRespectWildIgnore)
+        let l:globList = split(l:globString, "\n")
+    else
+        let l:globString = globpath(l:pathSpec, a:pattern)
+        let l:globList = split(l:globString, "\n")
+    endif
+
+    " If a:all is false, filter '.' and '..' from the output.
+    if !a:all
+        let l:toRemove = []
+
+        for l:file in l:globList
+            let l:tail = fnamemodify(l:file, ':t')
+
+            " If l:file has a trailing slash, then its :tail will be ''. Use
+            " :h to drop the slash and the empty string after it; then use :t
+            " to get the directory name.
+            if l:tail ==# ''
+                let l:tail = fnamemodify(l:file, ':h:t')
+            endif
+
+            if l:tail ==# '.' || l:tail ==# '..'
+                call add(l:toRemove, l:file)
+                if len(l:toRemove) ==# 2
+                    break
+                endif
+            endif
+        endfor
+
+        for l:file in l:toRemove
+            call remove(l:globList, index(l:globList, l:file))
+        endfor
+    endif
+
+    return l:globList
+endfunction
+
+" FUNCTION: TreeDirNode.GetSelected() {{{1
+" Returns the current node if it is a dir node, or else returns the current
+" nodes parent
+unlet s:TreeDirNode.GetSelected
+function! s:TreeDirNode.GetSelected()
+    let currentDir = g:NERDTreeFileNode.GetSelected()
+    if currentDir !=# {} && !currentDir.isRoot()
+        if currentDir.path.isDirectory ==# 0
+            let currentDir = currentDir.parent
+        endif
+    endif
+    return currentDir
+endfunction
+
+" FUNCTION: TreeDirNode.getVisibleChildCount() {{{1
+" Returns the number of visible children this node has
+function! s:TreeDirNode.getVisibleChildCount()
+    return len(self.getVisibleChildren())
+endfunction
+
+" FUNCTION: TreeDirNode.getVisibleChildren() {{{1
+" Returns a list of children to display for this node, in the correct order
+"
+" Return:
+" an array of treenodes
+function! s:TreeDirNode.getVisibleChildren()
+    let toReturn = []
+    for i in self.children
+        if i.path.ignore(self.getNerdtree()) ==# 0
+            call add(toReturn, i)
+        endif
+    endfor
+    return toReturn
+endfunction
+
+" FUNCTION: TreeDirNode.hasVisibleChildren() {{{1
+" returns 1 if this node has any childre, 0 otherwise..
+function! s:TreeDirNode.hasVisibleChildren()
+    return self.getVisibleChildCount() !=# 0
+endfunction
+
+" FUNCTION: TreeDirNode.isCascadable() {{{1
+" true if this dir has only one visible child that is also a dir
+" false if this dir is bookmarked or symlinked. Why? Two reasons:
+"  1. If cascaded, we don't know which dir is bookmarked or is a symlink.
+"  2. If the parent is a symlink or is bookmarked, you end up with unparsable
+"     text, and NERDTree cannot get the path of any child node.
+" Also, return false if this directory is the tree root, which should never be
+" part of a cascade.
+function! s:TreeDirNode.isCascadable()
+    if g:NERDTreeCascadeSingleChildDir ==# 0
+        return 0
+    endif
+
+    if self.isRoot()
+        return 0
+    endif
+
+    if self.path.isSymLink
+        return 0
+    endif
+
+    for i in g:NERDTreeBookmark.Bookmarks()
+        if i.path.equals(self.path)
+            return 0
+        endif
+    endfor
+
+    let c = self.getVisibleChildren()
+    return len(c) ==# 1 && c[0].path.isDirectory
+endfunction
+
+" FUNCTION: TreeDirNode._initChildren() {{{1
+" Removes all childen from this node and re-reads them
+"
+" Args:
+" silent: 1 if the function should not echo any 'please wait' messages for
+" large directories
+"
+" Return: the number of child nodes read
+function! s:TreeDirNode._initChildren(silent)
+    "remove all the current child nodes
+    let self.children = []
+
+    let files = self._glob('*', 1) + self._glob('.*', 0)
+
+    if !a:silent && len(files) > g:NERDTreeNotificationThreshold
+        call nerdtree#echo('Please wait, caching a large dir ...')
+    endif
+
+    let invalidFilesFound = 0
+    let invalidFiles = []
+    for i in files
+        try
+            let path = g:NERDTreePath.New(i)
+            call self.createChild(path, 0)
+            call g:NERDTreePathNotifier.NotifyListeners('init', path, self.getNerdtree(), {})
+        catch /^NERDTree.\(InvalidArguments\|InvalidFiletype\)Error/
+            let invalidFilesFound += 1
+            let invalidFiles += [i]
+        endtry
+    endfor
+
+    let g:NERDTreeOldSortOrder = g:NERDTreeSortOrder
+    call self.sortChildren()
+
+    call nerdtree#echo('')
+
+    if invalidFilesFound
+        call nerdtree#echoWarning(invalidFilesFound . ' Invalid file(s): ' . join(invalidFiles, ', '))
+    endif
+    return self.getChildCount()
+endfunction
+
+" FUNCTION: TreeDirNode.New(path, nerdtree) {{{1
+" Return a new TreeDirNode object with the given path and parent.
+"
+" Args:
+" path: dir that the node represents
+" nerdtree: the tree the node belongs to
+function! s:TreeDirNode.New(path, nerdtree)
+    if a:path.isDirectory !=# 1
+        throw 'NERDTree.InvalidArgumentsError: A TreeDirNode object must be instantiated with a directory Path object.'
+    endif
+
+    let newTreeNode = copy(self)
+    let newTreeNode.path = a:path
+
+    let newTreeNode.isOpen = 0
+    let newTreeNode.children = []
+
+    let newTreeNode.parent = {}
+    let newTreeNode._nerdtree = a:nerdtree
+
+    return newTreeNode
+endfunction
+
+" FUNCTION: TreeDirNode.open([options]) {{{1
+" Open this directory node in the current tree or elsewhere if special options
+" are provided. Return 0 if options were processed. Otherwise, return the
+" number of new cached nodes.
+function! s:TreeDirNode.open(...)
+    let l:options = a:0 ? a:1 : {}
+
+    " If special options were specified, process them and return.
+    if has_key(l:options, 'where') && !empty(l:options['where'])
+        let l:opener = g:NERDTreeOpener.New(self.path, l:options)
+        call l:opener.open(self)
+        return 0
+    endif
+
+    " Open any ancestors of this node that render within the same cascade.
+    let l:parent = self.parent
+    while !empty(l:parent) && !l:parent.isRoot()
+        if index(l:parent.getCascade(), self) >= 0
+            let l:parent.isOpen = 1
+            let l:parent = l:parent.parent
+        else
+            break
+        endif
+    endwhile
+
+    let self.isOpen = 1
+
+    let l:numChildrenCached = 0
+    if empty(self.children)
+        let l:numChildrenCached = self._initChildren(0)
+    endif
+
+    return l:numChildrenCached
+endfunction
+
+" FUNCTION: TreeDirNode.openAlong([opts]) {{{1
+" recursive open the dir if it has only one directory child.
+"
+" return the level of opened directories.
+function! s:TreeDirNode.openAlong(...)
+    let opts = a:0 ? a:1 : {}
+    let level = 0
+
+    let node = self
+    while node.path.isDirectory
+        call node.open(opts)
+        let level += 1
+        if node.getVisibleChildCount() ==# 1
+            let node = node.getChildByIndex(0, 1)
+        else
+            break
+        endif
+    endwhile
+    return level
+endfunction
+
+" FUNCTION: TreeDirNode.openExplorer() {{{1
+" Open an explorer window for this node in the previous window. The explorer
+" can be a NERDTree window or a netrw window.
+function! s:TreeDirNode.openExplorer()
+    execute 'wincmd p'
+    execute 'edit '.self.path.str({'format':'Edit'})
+endfunction
+
+" FUNCTION: TreeDirNode.openInNewTab(options) {{{1
+unlet s:TreeDirNode.openInNewTab
+function! s:TreeDirNode.openInNewTab(options)
+    call nerdtree#deprecated('TreeDirNode.openInNewTab', 'is deprecated, use open() instead')
+    call self.open({'where': 't'})
+endfunction
+
+" FUNCTION: TreeDirNode._openInNewTab() {{{1
+function! s:TreeDirNode._openInNewTab()
+    tabnew
+    call g:NERDTreeCreator.CreateTabTree(self.path.str())
+endfunction
+
+" FUNCTION: TreeDirNode.openRecursively() {{{1
+" Open this directory node and any descendant directory nodes whose pathnames
+" are not ignored.
+function! s:TreeDirNode.openRecursively()
+    silent call self.open()
+
+    for l:child in self.children
+        if l:child.path.isDirectory && !l:child.path.ignore(l:child.getNerdtree())
+            call l:child.openRecursively()
+        endif
+    endfor
+endfunction
+
+" FUNCTION: TreeDirNode.refresh() {{{1
+function! s:TreeDirNode.refresh()
+    call self.path.refresh(self.getNerdtree())
+
+    "if this node was ever opened, refresh its children
+    if self.isOpen || !empty(self.children)
+        let files = self._glob('*', 1) + self._glob('.*', 0)
+        let newChildNodes = []
+        let invalidFilesFound = 0
+        let invalidFiles = []
+        for i in files
+            try
+                "create a new path and see if it exists in this nodes children
+                let path = g:NERDTreePath.New(i)
+                let newNode = self.getChild(path)
+                if newNode !=# {} && path.str() ==# newNode.path.str()
+                    call newNode.refresh()
+                    call add(newChildNodes, newNode)
+
+                "the node doesnt exist so create it
+                else
+                    let newNode = g:NERDTreeFileNode.New(path, self.getNerdtree())
+                    let newNode.parent = self
+                    call add(newChildNodes, newNode)
+                endif
+            catch /^NERDTree.\(InvalidArguments\|InvalidFiletype\)Error/
+                let invalidFilesFound += 1
+                let invalidFiles += [i]
+            endtry
+        endfor
+
+        "swap this nodes children out for the children we just read/refreshed
+        let self.children = newChildNodes
+        call self.sortChildren()
+
+        if invalidFilesFound
+            call nerdtree#echoWarning(invalidFilesFound . ' Invalid file(s): ' . join(invalidFiles, ', '))
+        endif
+    endif
+endfunction
+
+" FUNCTION: TreeDirNode.refreshFlags() {{{1
+unlet s:TreeDirNode.refreshFlags
+function! s:TreeDirNode.refreshFlags()
+    call self.path.refreshFlags(self.getNerdtree())
+    for i in self.children
+        call i.refreshFlags()
+    endfor
+endfunction
+
+" FUNCTION: TreeDirNode.refreshDirFlags() {{{1
+function! s:TreeDirNode.refreshDirFlags()
+    call self.path.refreshFlags(self.getNerdtree())
+endfunction
+
+" FUNCTION: TreeDirNode.reveal(path) {{{1
+" reveal the given path, i.e. cache and open all treenodes needed to display it
+" in the UI
+" Returns the revealed node
+function! s:TreeDirNode.reveal(path, ...)
+    let opts = a:0 ? a:1 : {}
+
+    if !a:path.isUnder(self.path)
+        throw 'NERDTree.InvalidArgumentsError: ' . a:path.str() . ' should be under ' . self.path.str()
+    endif
+
+    call self.open()
+
+    if self.path.equals(a:path.getParent())
+        let n = self.findNode(a:path)
+        " We may be looking for a newly-saved file that isn't in the tree yet.
+        if n ==# {}
+            call self.refresh()
+            let n = self.findNode(a:path)
+        endif
+        if has_key(opts, 'open')
+            call n.open()
+        endif
+        return n
+    endif
+
+    let p = a:path
+    while !p.getParent().equals(self.path)
+        let p = p.getParent()
+    endwhile
+
+    let n = self.findNode(p)
+    return n.reveal(a:path, opts)
+endfunction
+
+" FUNCTION: TreeDirNode.removeChild(treenode) {{{1
+" Remove the given treenode from self.children.
+" Throws NERDTree.ChildNotFoundError if the node is not found.
+"
+" Args:
+" treenode: the node object to remove
+function! s:TreeDirNode.removeChild(treenode)
+    for i in range(0, self.getChildCount()-1)
+        if self.children[i].equals(a:treenode)
+            call remove(self.children, i)
+            return
+        endif
+    endfor
+
+    throw 'NERDTree.ChildNotFoundError: child node was not found'
+endfunction
+
+" FUNCTION: TreeDirNode.sortChildren() {{{1
+" Sort self.children by alphabetical order and directory priority.
+function! s:TreeDirNode.sortChildren()
+    if count(g:NERDTreeSortOrder, '*') < 1
+        call add(g:NERDTreeSortOrder, '*')
+    endif
+    let CompareFunc = function('nerdtree#compareNodes')
+    call sort(self.children, CompareFunc)
+    let g:NERDTreeOldSortOrder = g:NERDTreeSortOrder
+endfunction
+
+" FUNCTION: TreeDirNode.toggleOpen([options]) {{{1
+" Opens this directory if it is closed and vice versa
+function! s:TreeDirNode.toggleOpen(...)
+    let opts = a:0 ? a:1 : {}
+    if self.isOpen ==# 1
+        call self.close()
+    else
+        if g:NERDTreeCascadeOpenSingleChildDir ==# 0
+            call self.open(opts)
+        else
+            call self.openAlong(opts)
+        endif
+    endif
+endfunction
+
+" FUNCTION: TreeDirNode.transplantChild(newNode) {{{1
+" Replaces the child of this with the given node (where the child node's full
+" path matches a:newNode's fullpath). The search for the matching node is
+" non-recursive
+"
+" Arg:
+" newNode: the node to graft into the tree
+function! s:TreeDirNode.transplantChild(newNode)
+    for i in range(0, self.getChildCount()-1)
+        if self.children[i].equals(a:newNode)
+            let self.children[i] = a:newNode
+            let a:newNode.parent = self
+            break
+        endif
+    endfor
+endfunction
+
+" vim: set sw=4 sts=4 et fdm=marker:

lib/nerdtree/tree_file_node.vim

@@ -0,0 +1,349 @@
+" ============================================================================
+" CLASS: TreeFileNode
+"
+" This class is the parent of the TreeDirNode class and is the 'Component'
+" part of the composite design pattern between the NERDTree node classes.
+" ============================================================================
+
+
+let s:TreeFileNode = {}
+let g:NERDTreeFileNode = s:TreeFileNode
+
+" FUNCTION: TreeFileNode.activate(...) {{{1
+function! s:TreeFileNode.activate(...)
+    call self.open(a:0 ? a:1 : {})
+endfunction
+
+" FUNCTION: TreeFileNode.bookmark(name) {{{1
+" bookmark this node with a:name
+function! s:TreeFileNode.bookmark(name)
+
+    " if a bookmark exists with the same name and the node is cached then save
+    " it so we can update its display string
+    let oldMarkedNode = {}
+    try
+        let oldMarkedNode = g:NERDTreeBookmark.GetNodeForName(a:name, 1, self.getNerdtree())
+    catch /^NERDTree.BookmarkNotFoundError/
+    catch /^NERDTree.BookmarkedNodeNotFoundError/
+    endtry
+
+    call g:NERDTreeBookmark.AddBookmark(a:name, self.path)
+    call self.path.cacheDisplayString()
+    call g:NERDTreeBookmark.Write()
+
+    if !empty(oldMarkedNode)
+        call oldMarkedNode.path.cacheDisplayString()
+    endif
+endfunction
+
+" FUNCTION: TreeFileNode.cacheParent() {{{1
+" initializes self.parent if it isnt already
+function! s:TreeFileNode.cacheParent()
+    if empty(self.parent)
+        let parentPath = self.path.getParent()
+        if parentPath.equals(self.path)
+            throw 'NERDTree.CannotCacheParentError: already at root'
+        endif
+        let self.parent = s:TreeFileNode.New(parentPath, self.getNerdtree())
+    endif
+endfunction
+
+" FUNCTION: TreeFileNode.clearBookmarks() {{{1
+function! s:TreeFileNode.clearBookmarks()
+    for i in g:NERDTreeBookmark.Bookmarks()
+        if i.path.equals(self.path)
+            call i.delete()
+        end
+    endfor
+    call self.path.cacheDisplayString()
+endfunction
+
+" FUNCTION: TreeFileNode.copy(dest) {{{1
+function! s:TreeFileNode.copy(dest)
+    call self.path.copy(a:dest)
+    let newPath = g:NERDTreePath.New(a:dest)
+    let parent = self.getNerdtree().root.findNode(newPath.getParent())
+    if !empty(parent)
+        call parent.refresh()
+        return parent.findNode(newPath)
+    else
+        return {}
+    endif
+endfunction
+
+" FUNCTION: TreeFileNode.delete {{{1
+" Removes this node from the tree and calls the Delete method for its path obj
+function! s:TreeFileNode.delete()
+    call self.path.delete()
+    call self.parent.removeChild(self)
+endfunction
+
+" FUNCTION: TreeFileNode.displayString() {{{1
+"
+" Returns a string that specifies how the node should be represented as a
+" string
+"
+" Return:
+" a string that can be used in the view to represent this node
+function! s:TreeFileNode.displayString()
+    return self.path.flagSet.renderToString() . self.path.displayString()
+endfunction
+
+" FUNCTION: TreeFileNode.equals(treenode) {{{1
+"
+" Compares this treenode to the input treenode and returns 1 if they are the
+" same node.
+"
+" Use this method instead of ==  because sometimes when the treenodes contain
+" many children, vim seg faults when doing ==
+"
+" Args:
+" treenode: the other treenode to compare to
+function! s:TreeFileNode.equals(treenode)
+    return self.path.str() ==# a:treenode.path.str()
+endfunction
+
+" FUNCTION: TreeFileNode.findNode(path) {{{1
+" Returns self if this node.path.Equals the given path.
+" Returns {} if not equal.
+"
+" Args:
+" path: the path object to compare against
+function! s:TreeFileNode.findNode(path)
+    if a:path.equals(self.path)
+        return self
+    endif
+    return {}
+endfunction
+
+" FUNCTION: TreeFileNode.findSibling(direction) {{{1
+" Find the next or previous sibling of this node.
+"
+" Args:
+" direction: 0 for previous, 1 for next
+"
+" Return:
+" The next/previous TreeFileNode object or an empty dictionary if not found.
+function! s:TreeFileNode.findSibling(direction)
+
+    " There can be no siblings if there is no parent.
+    if empty(self.parent)
+        return {}
+    endif
+
+    let l:nodeIndex = self.parent.getChildIndex(self.path)
+
+    if l:nodeIndex == -1
+        return {}
+    endif
+
+    " Get the next index to begin the search.
+    let l:nodeIndex += a:direction ? 1 : -1
+
+    while 0 <= l:nodeIndex && l:nodeIndex < self.parent.getChildCount()
+
+        " Return the next node if it is not ignored.
+        if !self.parent.children[l:nodeIndex].path.ignore(self.getNerdtree())
+            return self.parent.children[l:nodeIndex]
+        endif
+
+        let l:nodeIndex += a:direction ? 1 : -1
+    endwhile
+
+    return {}
+endfunction
+
+" FUNCTION: TreeFileNode.getNerdtree(){{{1
+function! s:TreeFileNode.getNerdtree()
+    return self._nerdtree
+endfunction
+
+" FUNCTION: TreeFileNode.GetRootForTab(){{{1
+" get the root node for this tab
+function! s:TreeFileNode.GetRootForTab()
+    if g:NERDTree.ExistsForTab()
+        return getbufvar(t:NERDTreeBufName, 'NERDTree').root
+    end
+    return {}
+endfunction
+
+" FUNCTION: TreeFileNode.GetSelected() {{{1
+" If the cursor is currently positioned on a tree node, return the node.
+" Otherwise, return the empty dictionary.
+function! s:TreeFileNode.GetSelected()
+
+    try
+        let l:path = b:NERDTree.ui.getPath(line('.'))
+
+        if empty(l:path)
+            return {}
+        endif
+
+        return b:NERDTree.root.findNode(l:path)
+    catch
+        return {}
+    endtry
+endfunction
+
+" FUNCTION: TreeFileNode.isVisible() {{{1
+" returns 1 if this node should be visible according to the tree filters and
+" hidden file filters (and their on/off status)
+function! s:TreeFileNode.isVisible()
+    return !self.path.ignore(self.getNerdtree())
+endfunction
+
+" FUNCTION: TreeFileNode.isRoot() {{{1
+function! s:TreeFileNode.isRoot()
+    if !g:NERDTree.ExistsForBuf()
+        throw 'NERDTree.NoTreeError: No tree exists for the current buffer'
+    endif
+
+    return self.equals(self.getNerdtree().root)
+endfunction
+
+" FUNCTION: TreeFileNode.New(path, nerdtree) {{{1
+" Returns a new TreeNode object with the given path and parent
+"
+" Args:
+" path: file/dir that the node represents
+" nerdtree: the tree the node belongs to
+function! s:TreeFileNode.New(path, nerdtree)
+    if a:path.isDirectory
+        return g:NERDTreeDirNode.New(a:path, a:nerdtree)
+    else
+        let newTreeNode = copy(self)
+        let newTreeNode.path = a:path
+        let newTreeNode.parent = {}
+        let newTreeNode._nerdtree = a:nerdtree
+        return newTreeNode
+    endif
+endfunction
+
+" FUNCTION: TreeFileNode.open() {{{1
+function! s:TreeFileNode.open(...)
+    let opts = a:0 ? a:1 : {}
+    let opener = g:NERDTreeOpener.New(self.path, opts)
+    call opener.open(self)
+endfunction
+
+" FUNCTION: TreeFileNode.openSplit() {{{1
+" Open this node in a new window
+function! s:TreeFileNode.openSplit()
+    call nerdtree#deprecated('TreeFileNode.openSplit', 'is deprecated, use .open() instead.')
+    call self.open({'where': 'h'})
+endfunction
+
+" FUNCTION: TreeFileNode.openVSplit() {{{1
+" Open this node in a new vertical window
+function! s:TreeFileNode.openVSplit()
+    call nerdtree#deprecated('TreeFileNode.openVSplit', 'is deprecated, use .open() instead.')
+    call self.open({'where': 'v'})
+endfunction
+
+" FUNCTION: TreeFileNode.openInNewTab(options) {{{1
+function! s:TreeFileNode.openInNewTab(options)
+    call nerdtree#deprecated('TreeFileNode.openinNewTab', 'is deprecated, use .open() instead.')
+    call self.open(extend({'where': 't'}, a:options))
+endfunction
+
+" FUNCTION: TreeFileNode.openExplorer()
+function! s:TreeFileNode.openExplorer()
+    execute 'wincmd p'
+    execute 'edit '.self.path.getParent().str({'format':'Edit'})
+endfunction
+
+" FUNCTION: TreeFileNode.putCursorHere(isJump, recurseUpward){{{1
+" Places the cursor on the line number this node is rendered on
+"
+" Args:
+" isJump: 1 if this cursor movement should be counted as a jump by vim
+" recurseUpward: try to put the cursor on the parent if the this node isnt
+" visible
+function! s:TreeFileNode.putCursorHere(isJump, recurseUpward)
+    let ln = self.getNerdtree().ui.getLineNum(self)
+    if ln != -1
+        if a:isJump
+            mark '
+        endif
+        call cursor(ln, col('.'))
+    else
+        if a:recurseUpward
+            let node = self
+            while node != {} && self.getNerdtree().ui.getLineNum(node) ==# -1
+                let node = node.parent
+                call node.open()
+            endwhile
+            call self._nerdtree.render()
+            call node.putCursorHere(a:isJump, 0)
+        endif
+    endif
+endfunction
+
+" FUNCTION: TreeFileNode.refresh() {{{1
+function! s:TreeFileNode.refresh()
+    call self.path.refresh(self.getNerdtree())
+endfunction
+
+" FUNCTION: TreeFileNode.refreshFlags() {{{1
+function! s:TreeFileNode.refreshFlags()
+    call self.path.refreshFlags(self.getNerdtree())
+endfunction
+
+" FUNCTION: TreeFileNode.rename() {{{1
+" Calls the rename method for this nodes path obj
+function! s:TreeFileNode.rename(newName)
+    let newName = substitute(a:newName, '\(\\\|\/\)$', '', '')
+    call self.path.rename(newName)
+    call self.parent.removeChild(self)
+
+    let parentPath = self.path.getParent()
+    let newParent = self.getNerdtree().root.findNode(parentPath)
+
+    if newParent != {}
+        call newParent.createChild(self.path, 1)
+        call newParent.refresh()
+    endif
+endfunction
+
+" FUNCTION: TreeFileNode.renderToString {{{1
+" returns a string representation for this tree to be rendered in the view
+function! s:TreeFileNode.renderToString()
+    return self._renderToString(0, 0)
+endfunction
+
+" Args:
+" depth: the current depth in the tree for this call
+" drawText: 1 if we should actually draw the line for this node (if 0 then the
+" child nodes are rendered only)
+" for each depth in the tree
+function! s:TreeFileNode._renderToString(depth, drawText)
+    let output = ''
+    if a:drawText ==# 1
+
+        let treeParts = repeat('  ', a:depth - 1)
+        let treeParts .= (self.path.isDirectory || g:NERDTreeDirArrowExpandable ==# '' ? '' : '  ')
+
+        let line = treeParts . self.displayString()
+        let output = output . line . "\n"
+    endif
+
+    " if the node is an open dir, draw its children
+    if self.path.isDirectory ==# 1 && self.isOpen ==# 1
+
+        let childNodesToDraw = self.getVisibleChildren()
+
+        if self.isCascadable() && a:depth > 0
+
+            let output = output . childNodesToDraw[0]._renderToString(a:depth, 0)
+
+        elseif len(childNodesToDraw) > 0
+            for i in childNodesToDraw
+                let output = output . i._renderToString(a:depth + 1, 1)
+            endfor
+        endif
+    endif
+
+    return output
+endfunction
+
+" vim: set sw=4 sts=4 et fdm=marker:

lib/nerdtree/ui.vim

@@ -0,0 +1,558 @@
+" ============================================================================
+" CLASS: UI
+" ============================================================================
+
+
+let s:UI = {}
+let g:NERDTreeUI = s:UI
+
+" FUNCTION: s:UI.centerView() {{{1
+" centers the nerd tree window around the cursor (provided the nerd tree
+" options permit)
+function! s:UI.centerView()
+    if g:NERDTreeAutoCenter
+        let current_line = winline()
+        let lines_to_top = current_line
+        let lines_to_bottom = winheight(g:NERDTree.GetWinNum()) - current_line
+        if lines_to_top < g:NERDTreeAutoCenterThreshold || lines_to_bottom < g:NERDTreeAutoCenterThreshold
+            normal! zz
+        endif
+    endif
+endfunction
+
+" FUNCTION: s:UI._dumpHelp  {{{1
+" prints out the quick help
+function! s:UI._dumpHelp()
+    if self.getShowHelp()
+        let help  = "\" NERDTree (" . nerdtree#version() . ") quickhelp~\n"
+        let help .= "\" ============================\n"
+        let help .= "\" File node mappings~\n"
+        let help .= '" '. (g:NERDTreeMouseMode ==# 3 ? 'single' : 'double') ."-click,\n"
+        if self.nerdtree.isTabTree()
+            let help .= '" '. g:NERDTreeMapActivateNode .": open in prev window\n"
+        else
+            let help .= '" '. g:NERDTreeMapActivateNode .": open in current window\n"
+        endif
+        if self.nerdtree.isTabTree()
+            let help .= '" '. g:NERDTreeMapPreview .": preview\n"
+        endif
+        let help .= '" '. g:NERDTreeMapOpenInTab.": open in new tab\n"
+        let help .= '" '. g:NERDTreeMapOpenInTabSilent .": open in new tab silently\n"
+        let help .= "\" middle-click,\n"
+        let help .= '" '. g:NERDTreeMapOpenSplit .": open split\n"
+        let help .= '" '. g:NERDTreeMapPreviewSplit .": preview split\n"
+        let help .= '" '. g:NERDTreeMapOpenVSplit .": open vsplit\n"
+        let help .= '" '. g:NERDTreeMapPreviewVSplit .": preview vsplit\n"
+        let help .= '" '. g:NERDTreeMapCustomOpen .": custom open\n"
+
+        let help .= "\"\n\" ----------------------------\n"
+        let help .= "\" Directory node mappings~\n"
+        let help .= '" '. (g:NERDTreeMouseMode ==# 1 ? 'double' : 'single') ."-click,\n"
+        let help .= '" '. g:NERDTreeMapActivateNode .": open & close node\n"
+        let help .= '" '. g:NERDTreeMapOpenRecursively .": recursively open node\n"
+        let help .= '" '. g:NERDTreeMapOpenInTab.": open in new tab\n"
+        let help .= '" '. g:NERDTreeMapOpenInTabSilent .": open in new tab silently\n"
+        let help .= '" '. g:NERDTreeMapCustomOpen .": custom open\n"
+        let help .= '" '. g:NERDTreeMapCloseDir .": close parent of node\n"
+        let help .= '" '. g:NERDTreeMapCloseChildren .": close all child nodes of\n"
+        let help .= "\"    current node recursively\n"
+        let help .= "\" middle-click,\n"
+        let help .= '" '. g:NERDTreeMapOpenExpl.": explore selected dir\n"
+
+        let help .= "\"\n\" ----------------------------\n"
+        let help .= "\" Bookmark table mappings~\n"
+        let help .= "\" double-click,\n"
+        let help .= '" '. g:NERDTreeMapJumpBookmarks .": jump to bookmark table\n"
+        let help .= '" '. g:NERDTreeMapActivateNode .": open bookmark\n"
+        let help .= '" '. g:NERDTreeMapPreview .": preview file\n"
+        let help .= '" '. g:NERDTreeMapPreview .": find dir in tree\n"
+        let help .= '" '. g:NERDTreeMapOpenInTab.": open in new tab\n"
+        let help .= '" '. g:NERDTreeMapOpenInTabSilent .": open in new tab silently\n"
+        let help .= '" '. g:NERDTreeMapOpenSplit .": open split\n"
+        let help .= '" '. g:NERDTreeMapPreviewSplit .": preview split\n"
+        let help .= '" '. g:NERDTreeMapOpenVSplit .": open vsplit\n"
+        let help .= '" '. g:NERDTreeMapPreviewVSplit .": preview vsplit\n"
+        let help .= '" '. g:NERDTreeMapCustomOpen .": custom open\n"
+        let help .= '" '. g:NERDTreeMapDeleteBookmark .": delete bookmark\n"
+
+        let help .= "\"\n\" ----------------------------\n"
+        let help .= "\" Tree navigation mappings~\n"
+        let help .= '" '. g:NERDTreeMapJumpRoot .": go to root\n"
+        let help .= '" '. g:NERDTreeMapJumpParent .": go to parent\n"
+        let help .= '" '. g:NERDTreeMapJumpFirstChild  .": go to first child\n"
+        let help .= '" '. g:NERDTreeMapJumpLastChild   .": go to last child\n"
+        let help .= '" '. g:NERDTreeMapJumpNextSibling .": go to next sibling\n"
+        let help .= '" '. g:NERDTreeMapJumpPrevSibling .": go to prev sibling\n"
+
+        let help .= "\"\n\" ----------------------------\n"
+        let help .= "\" Filesystem mappings~\n"
+        let help .= '" '. g:NERDTreeMapChangeRoot .": change tree root to the\n"
+        let help .= "\"    selected dir\n"
+        let help .= '" '. g:NERDTreeMapUpdir .": move tree root up a dir\n"
+        let help .= '" '. g:NERDTreeMapUpdirKeepOpen .": move tree root up a dir\n"
+        let help .= "\"    but leave old root open\n"
+        let help .= '" '. g:NERDTreeMapRefresh .": refresh cursor dir\n"
+        let help .= '" '. g:NERDTreeMapRefreshRoot .": refresh current root\n"
+        let help .= '" '. g:NERDTreeMapMenu .": Show menu\n"
+        let help .= '" '. g:NERDTreeMapChdir .":change the CWD to the\n"
+        let help .= "\"    selected dir\n"
+        let help .= '" '. g:NERDTreeMapCWD .":change tree root to CWD\n"
+
+        let help .= "\"\n\" ----------------------------\n"
+        let help .= "\" Tree filtering mappings~\n"
+        let help .= '" '. g:NERDTreeMapToggleHidden .': hidden files (' . (self.getShowHidden() ? 'on' : 'off') . ")\n"
+        let help .= '" '. g:NERDTreeMapToggleFilters .': file filters (' . (self.isIgnoreFilterEnabled() ? 'on' : 'off') . ")\n"
+        let help .= '" '. g:NERDTreeMapToggleFiles .': files (' . (self.getShowFiles() ? 'on' : 'off') . ")\n"
+        let help .= '" '. g:NERDTreeMapToggleBookmarks .': bookmarks (' . (self.getShowBookmarks() ? 'on' : 'off') . ")\n"
+        let help .= '" '. g:NERDTreeMapToggleFileLines .': files lines (' . (self.getShowFileLines() ? 'on' : 'off') . ")\n"
+
+        " add quickhelp entries for each custom key map
+        let help .= "\"\n\" ----------------------------\n"
+        let help .= "\" Custom mappings~\n"
+        for i in g:NERDTreeKeyMap.All()
+            if !empty(i.quickhelpText)
+                let help .= '" '. i.key .': '. i.quickhelpText ."\n"
+            endif
+        endfor
+
+        let help .= "\"\n\" ----------------------------\n"
+        let help .= "\" Other mappings~\n"
+        let help .= '" '. g:NERDTreeMapQuit .": Close the NERDTree window\n"
+        let help .= '" '. g:NERDTreeMapToggleZoom .": Zoom (maximize-minimize)\n"
+        let help .= "\"    the NERDTree window\n"
+        let help .= '" '. g:NERDTreeMapHelp .": toggle help\n"
+        let help .= "\"\n\" ----------------------------\n"
+        let help .= "\" Bookmark commands~\n"
+        let help .= "\" :Bookmark [<name>]\n"
+        let help .= "\" :BookmarkToRoot <name>\n"
+        let help .= "\" :RevealBookmark <name>\n"
+        let help .= "\" :OpenBookmark <name>\n"
+        let help .= "\" :ClearBookmarks [<names>]\n"
+        let help .= "\" :ClearAllBookmarks\n"
+        let help .= "\" :ReadBookmarks\n"
+        let help .= "\" :WriteBookmarks\n"
+        let help .= "\" :EditBookmarks\n"
+        silent! put =help
+    elseif !self.isMinimal()
+        let help ='" Press '. g:NERDTreeMapHelp ." for help\n"
+        silent! put =help
+    endif
+endfunction
+
+
+" FUNCTION: s:UI.new(nerdtree) {{{1
+function! s:UI.New(nerdtree)
+    let newObj = copy(self)
+    let newObj.nerdtree = a:nerdtree
+    let newObj._showHelp = 0
+    let newObj._ignoreEnabled = 1
+    let newObj._showFiles = g:NERDTreeShowFiles
+    let newObj._showHidden = g:NERDTreeShowHidden
+    let newObj._showBookmarks = g:NERDTreeShowBookmarks
+    let newObj._showFileLines = g:NERDTreeFileLines
+
+    return newObj
+endfunction
+
+" FUNCTION: s:UI.getPath(ln) {{{1
+" Return the Path object for the node that is rendered on the given line
+" number.  If the 'up a dir' line is selected, return the Path object for
+" the parent of the root.  Return the empty dictionary if the given line
+" does not reference a tree node.
+function! s:UI.getPath(ln)
+    let line = getline(a:ln)
+
+    let rootLine = self.getRootLineNum()
+
+    if a:ln ==# rootLine
+        return self.nerdtree.root.path
+    endif
+
+    if line ==# s:UI.UpDirLine()
+        return self.nerdtree.root.path.getParent()
+    endif
+
+    if a:ln < rootLine
+        return {}
+    endif
+
+    let indent = self._indentLevelFor(line)
+
+    " remove the tree parts and the leading space
+    let curFile = self._stripMarkup(line)
+
+    let dir = ''
+    let lnum = a:ln
+    while lnum > 0
+        let lnum = lnum - 1
+        let curLine = getline(lnum)
+        let curLineStripped = self._stripMarkup(curLine)
+
+        " have we reached the top of the tree?
+        if lnum ==# rootLine
+            let dir = self.nerdtree.root.path.str({'format': 'UI'}) . dir
+            break
+        endif
+        if curLineStripped =~# '/$'
+            let lpindent = self._indentLevelFor(curLine)
+            if lpindent < indent
+                let indent = indent - 1
+
+                let dir = substitute (curLineStripped,'^\\', '', '') . dir
+                continue
+            endif
+        endif
+    endwhile
+    let curFile = self.nerdtree.root.path.drive . dir . curFile
+    let toReturn = g:NERDTreePath.New(curFile)
+    return toReturn
+endfunction
+
+" FUNCTION: s:UI.getLineNum(node) {{{1
+" Return the line number where the given node is rendered.  Return -1 if the
+" given node is not visible.
+function! s:UI.getLineNum(node)
+
+    if a:node.isRoot()
+        return self.getRootLineNum()
+    endif
+
+    let l:pathComponents = [substitute(self.nerdtree.root.path.str({'format': 'UI'}), '/\s*$', '', '')]
+    let l:currentPathComponent = 1
+
+    let l:fullPath = a:node.path.str({'format': 'UI'})
+
+    for l:lineNumber in range(self.getRootLineNum() + 1, line('$'))
+        let l:currentLine = getline(l:lineNumber)
+        let l:indentLevel = self._indentLevelFor(l:currentLine)
+
+        if l:indentLevel !=# l:currentPathComponent
+            continue
+        endif
+
+        let l:currentLine = self._stripMarkup(l:currentLine)
+        let l:currentPath =  join(l:pathComponents, '/') . '/' . l:currentLine
+
+        " Directories: If the current path 'starts with' the full path, then
+        " either the paths are equal or the line is a cascade containing the
+        " full path.
+        if l:fullPath[-1:] ==# '/' && stridx(l:currentPath, l:fullPath) ==# 0
+            return l:lineNumber
+        endif
+
+        " Files: The paths must exactly match.
+        if l:fullPath ==# l:currentPath
+            return l:lineNumber
+        endif
+
+        " Otherwise: If the full path starts with the current path and the
+        " current path is a directory, we add a new path component.
+        if stridx(l:fullPath, l:currentPath) ==# 0 && l:currentPath[-1:] ==# '/'
+            let l:currentLine = substitute(l:currentLine, '/\s*$', '', '')
+            call add(l:pathComponents, l:currentLine)
+            let l:currentPathComponent += 1
+        endif
+    endfor
+
+    return -1
+endfunction
+
+" FUNCTION: s:UI.getRootLineNum(){{{1
+" gets the line number of the root node
+function! s:UI.getRootLineNum()
+    let rootLine = 1
+    while rootLine <= line('$') && getline(rootLine) !~# '^\(/\|<\)'
+        let rootLine = rootLine + 1
+    endwhile
+    return rootLine
+endfunction
+
+" FUNCTION: s:UI.getShowBookmarks() {{{1
+function! s:UI.getShowBookmarks()
+    return self._showBookmarks
+endfunction
+
+" FUNCTION: s:UI.getShowFiles() {{{1
+function! s:UI.getShowFiles()
+    return self._showFiles
+endfunction
+
+" FUNCTION: s:UI.getShowHelp() {{{1
+function! s:UI.getShowHelp()
+    return self._showHelp
+endfunction
+
+" FUNCTION: s:UI.getShowHidden() {{{1
+function! s:UI.getShowHidden()
+    return self._showHidden
+endfunction
+
+" FUNCTION: s:UI.getShowFileLines() {{{1
+function! s:UI.getShowFileLines()
+    return self._showFileLines
+endfunction
+
+" FUNCTION: s:UI._indentLevelFor(line) {{{1
+function! s:UI._indentLevelFor(line)
+    " Replace multi-character DirArrows with a single space so the
+    " indentation calculation doesn't get messed up.
+    if g:NERDTreeDirArrowExpandable ==# ''
+        let l:line = '  '.a:line
+    else
+        let l:line = substitute(substitute(a:line, '\V'.g:NERDTreeDirArrowExpandable, ' ', ''), '\V'.g:NERDTreeDirArrowCollapsible, ' ', '')
+    endif
+    let leadChars = match(l:line, '\M\[^ ]')
+    return leadChars / s:UI.IndentWid()
+endfunction
+
+" FUNCTION: s:UI.IndentWid() {{{1
+function! s:UI.IndentWid()
+    return 2
+endfunction
+
+" FUNCTION: s:UI.isIgnoreFilterEnabled() {{{1
+function! s:UI.isIgnoreFilterEnabled()
+    return self._ignoreEnabled ==# 1
+endfunction
+
+" FUNCTION: s:UI.isMinimal() {{{1
+function! s:UI.isMinimal()
+    return g:NERDTreeMinimalUI
+endfunction
+
+" FUNCTION: s:UI.MarkupReg() {{{1
+function! s:UI.MarkupReg()
+    return '^ *['.g:NERDTreeDirArrowExpandable.g:NERDTreeDirArrowCollapsible.']\? '
+endfunction
+
+" FUNCTION: s:UI._renderBookmarks {{{1
+function! s:UI._renderBookmarks()
+
+    if !self.isMinimal()
+        call setline(line('.')+1, '>----------Bookmarks----------')
+        call cursor(line('.')+1, col('.'))
+    endif
+
+    if g:NERDTreeBookmarksSort ==# 1 || g:NERDTreeBookmarksSort ==# 2
+        call g:NERDTreeBookmark.SortBookmarksList()
+    endif
+
+    for i in g:NERDTreeBookmark.Bookmarks()
+        call setline(line('.')+1, i.str())
+        call cursor(line('.')+1, col('.'))
+    endfor
+
+    call setline(line('.')+1, '')
+    call cursor(line('.')+1, col('.'))
+endfunction
+
+" FUNCTION: s:UI.restoreScreenState() {{{1
+"
+" Sets the screen state back to what it was when nerdtree#saveScreenState was last
+" called.
+"
+" Assumes the cursor is in the NERDTree window
+function! s:UI.restoreScreenState()
+    if !has_key(self, '_screenState')
+        return
+    endif
+    call nerdtree#exec('silent vertical resize ' . self._screenState['oldWindowSize'], 1)
+
+    let old_scrolloff=&scrolloff
+    let &scrolloff=0
+    call cursor(self._screenState['oldTopLine'], 0)
+    normal! zt
+    call setpos('.', self._screenState['oldPos'])
+    let &scrolloff=old_scrolloff
+endfunction
+
+" FUNCTION: s:UI.saveScreenState() {{{1
+" Saves the current cursor position in the current buffer and the window
+" scroll position
+function! s:UI.saveScreenState()
+    let win = winnr()
+    let self._screenState = {}
+    try
+        call g:NERDTree.CursorToTreeWin()
+        let self._screenState['oldPos'] = getpos('.')
+        let self._screenState['oldTopLine'] = line('w0')
+        let self._screenState['oldWindowSize'] = winnr('$')==1 ? g:NERDTreeWinSize : winwidth('')
+        call nerdtree#exec(win . 'wincmd w', 1)
+    catch
+    endtry
+endfunction
+
+" FUNCTION: s:UI.setShowHidden(val) {{{1
+function! s:UI.setShowHidden(val)
+    let self._showHidden = a:val
+endfunction
+
+" FUNCTION: s:UI._stripMarkup(line){{{1
+" find the filename in the given line, and return it.
+"
+" Args:
+" line: the subject line
+function! s:UI._stripMarkup(line)
+    let l:line = substitute(a:line, '^.\{-}' . g:NERDTreeNodeDelimiter, '', '')
+    return substitute(l:line, g:NERDTreeNodeDelimiter.'.*$', '', '')
+endfunction
+
+" FUNCTION: s:UI.render() {{{1
+function! s:UI.render()
+    setlocal noreadonly modifiable
+
+    " remember the top line of the buffer and the current line so we can
+    " restore the view exactly how it was
+    let curLine = line('.')
+    let curCol = col('.')
+    let topLine = line('w0')
+
+    " delete all lines in the buffer (being careful not to clobber a register)
+    silent 1,$delete _
+
+    call self._dumpHelp()
+
+    " delete the blank line before the help and add one after it
+    if !self.isMinimal()
+        call setline(line('.')+1, '')
+        call cursor(line('.')+1, col('.'))
+    endif
+
+    if self.getShowBookmarks()
+        call self._renderBookmarks()
+    endif
+
+    " add the 'up a dir' line
+    if !self.isMinimal()
+        call setline(line('.')+1, s:UI.UpDirLine())
+        call cursor(line('.')+1, col('.'))
+    endif
+
+    " draw the header line
+    let header = self.nerdtree.root.path.str({'format': 'UI', 'truncateTo': winwidth(0)})
+    call setline(line('.')+1, header)
+    call cursor(line('.')+1, col('.'))
+
+    " draw the tree
+    silent put =self.nerdtree.root.renderToString()
+
+    " delete the blank line at the top of the buffer
+    silent 1,1delete _
+
+    " restore the view
+    let old_scrolloff=&scrolloff
+    let &scrolloff=0
+    call cursor(topLine, 1)
+    normal! zt
+    call cursor(curLine, curCol)
+    let &scrolloff = old_scrolloff
+
+    setlocal readonly nomodifiable
+endfunction
+
+
+" FUNCTION: UI.renderViewSavingPosition {{{1
+" Renders the tree and ensures the cursor stays on the current node or the
+" current nodes parent if it is no longer available upon re-rendering
+function! s:UI.renderViewSavingPosition()
+    let currentNode = g:NERDTreeFileNode.GetSelected()
+
+    " go up the tree till we find a node that will be visible or till we run
+    " out of nodes
+    while currentNode !=# {} && !currentNode.isVisible() && !currentNode.isRoot()
+        let currentNode = currentNode.parent
+    endwhile
+
+    call self.render()
+
+    if currentNode !=# {}
+        call currentNode.putCursorHere(0, 0)
+    endif
+endfunction
+
+" FUNCTION: s:UI.toggleHelp() {{{1
+function! s:UI.toggleHelp()
+    let self._showHelp = !self._showHelp
+endfunction
+
+" FUNCTION: s:UI.toggleIgnoreFilter() {{{1
+" toggles the use of the NERDTreeIgnore option
+function! s:UI.toggleIgnoreFilter()
+    let self._ignoreEnabled = !self._ignoreEnabled
+    call self.renderViewSavingPosition()
+    call self.centerView()
+endfunction
+
+" FUNCTION: s:UI.setShowBookmarks() {{{1
+" Sets the visibility of the Bookmark table.
+function! s:UI.setShowBookmarks(value)
+    let self._showBookmarks = a:value
+
+    if self.getShowBookmarks()
+        call self.nerdtree.render()
+        call g:NERDTree.CursorToBookmarkTable()
+    else
+
+        if empty(g:NERDTreeFileNode.GetSelected())
+            call b:NERDTree.root.putCursorHere(0, 0)
+            normal! 0
+        endif
+
+        call self.renderViewSavingPosition()
+    endif
+
+    call self.centerView()
+endfunction
+
+" FUNCTION: s:UI.toggleShowBookmarks() {{{1
+" Toggle the visibility of the Bookmark table.
+function! s:UI.toggleShowBookmarks()
+    call self.setShowBookmarks(!self._showBookmarks)
+endfunction
+
+" FUNCTION: s:UI.toggleShowFiles() {{{1
+" toggles the display of hidden files
+function! s:UI.toggleShowFiles()
+    let self._showFiles = !self._showFiles
+    call self.renderViewSavingPosition()
+    call self.centerView()
+endfunction
+
+" FUNCTION: s:UI.toggleShowHidden() {{{1
+" toggles the display of hidden files
+function! s:UI.toggleShowHidden()
+    let self._showHidden = !self._showHidden
+    call self.renderViewSavingPosition()
+    call self.centerView()
+endfunction
+
+" FUNCTION: s:UI.toggleShowFileLines() {{{1
+" toggles the display of file lines
+function! s:UI.toggleShowFileLines()
+    let self._showFileLines = !self._showFileLines
+    call self.nerdtree.root.refresh()
+    call self.renderViewSavingPosition()
+    call self.centerView()
+endfunction
+
+" FUNCTION: s:UI.toggleZoom() {{{1
+" zoom (maximize/minimize) the NERDTree window
+function! s:UI.toggleZoom()
+    if exists('b:NERDTreeZoomed') && b:NERDTreeZoomed
+        setlocal nowinfixwidth
+        wincmd =
+        setlocal winfixwidth
+        call nerdtree#exec('silent vertical resize '. g:NERDTreeWinSize, 1)
+        let b:NERDTreeZoomed = 0
+    else
+        call nerdtree#exec('vertical resize '. get(g:, 'NERDTreeWinSizeMax', ''), 1)
+        let b:NERDTreeZoomed = 1
+    endif
+endfunction
+
+" FUNCTION: s:UI.UpDirLine() {{{1
+function! s:UI.UpDirLine()
+    return '.. (up a dir)'
+endfunction
+
+" vim: set sw=4 sts=4 et fdm=marker:

nerdtree_plugin/exec_menuitem.vim

@@ -0,0 +1,40 @@
+" ============================================================================
+" File:        exec_menuitem.vim
+" Description: plugin for NERD Tree that provides an execute file menu item
+" Maintainer:  Martin Grenfell <martin.grenfell at gmail dot com>
+" License:     This program is free software. It comes without any warranty,
+"              to the extent permitted by applicable law. You can redistribute
+"              it and/or modify it under the terms of the Do What The Fuck You
+"              Want To Public License, Version 2, as published by Sam Hocevar.
+"              See http://sam.zoy.org/wtfpl/COPYING for more details.
+"
+" ============================================================================
+if exists('g:loaded_nerdtree_exec_menuitem')
+    finish
+endif
+let g:loaded_nerdtree_exec_menuitem = 1
+
+call NERDTreeAddMenuItem({
+            \ 'text': '(!)Execute file',
+            \ 'shortcut': '!',
+            \ 'callback': 'NERDTreeExecFile',
+            \ 'isActiveCallback': 'NERDTreeExecFileActive' })
+
+function! NERDTreeExecFileActive()
+    let node = g:NERDTreeFileNode.GetSelected()
+    return !node.path.isDirectory && node.path.isExecutable
+endfunction
+
+function! NERDTreeExecFile()
+    let treenode = g:NERDTreeFileNode.GetSelected()
+    echo "==========================================================\n"
+    echo "Complete the command to execute (add arguments etc):\n"
+    let cmd = treenode.path.str({'escape': 1})
+    let cmd = input(':!', cmd . ' ')
+
+    if cmd !=# ''
+        exec ':!' . cmd
+    else
+        echo 'Aborted'
+    endif
+endfunction

nerdtree_plugin/fs_menu.vim

@@ -0,0 +1,557 @@
+" ============================================================================
+" File:        fs_menu.vim
+" Description: plugin for the NERD Tree that provides a file system menu
+" Maintainer:  Martin Grenfell <martin.grenfell at gmail dot com>
+" License:     This program is free software. It comes without any warranty,
+"              to the extent permitted by applicable law. You can redistribute
+"              it and/or modify it under the terms of the Do What The Fuck You
+"              Want To Public License, Version 2, as published by Sam Hocevar.
+"              See http://sam.zoy.org/wtfpl/COPYING for more details.
+"
+" ============================================================================
+if exists('g:loaded_nerdtree_fs_menu')
+    finish
+endif
+let g:loaded_nerdtree_fs_menu = 1
+
+"Automatically delete the buffer after deleting or renaming a file
+if !exists('g:NERDTreeAutoDeleteBuffer')
+    let g:NERDTreeAutoDeleteBuffer = 0
+endif
+
+call NERDTreeAddMenuItem({'text': '(a)dd a childnode', 'shortcut': 'a', 'callback': 'NERDTreeAddNode'})
+call NERDTreeAddMenuItem({'text': '(m)ove the current node', 'shortcut': 'm', 'callback': 'NERDTreeMoveNode'})
+call NERDTreeAddMenuItem({'text': '(d)elete the current node', 'shortcut': 'd', 'callback': 'NERDTreeDeleteNode'})
+
+if nerdtree#runningMac()
+    call NERDTreeAddMenuItem({'text': '(r)eveal the current node in the Finder', 'shortcut': 'r', 'callback': 'NERDTreeRevealInFinder'})
+    call NERDTreeAddMenuItem({'text': '(o)pen the current node with system editor', 'shortcut': 'o', 'callback': 'NERDTreeExecuteFile'})
+    call NERDTreeAddMenuItem({'text': '(q)uicklook the current node', 'shortcut': 'q', 'callback': 'NERDTreeQuickLook'})
+endif
+
+if executable('xdg-open')
+    call NERDTreeAddMenuItem({'text': '(r)eveal the current node in file manager', 'shortcut': 'r', 'callback': 'NERDTreeRevealFileLinux'})
+    call NERDTreeAddMenuItem({'text': '(o)pen the current node with system editor', 'shortcut': 'o', 'callback': 'NERDTreeExecuteFileLinux'})
+endif
+
+if nerdtree#runningWindows()
+    call NERDTreeAddMenuItem({'text': '(r)eveal the current node in the Explorer', 'shortcut': 'r', 'callback': 'NERDTreeRevealInExplorer'})
+    call NERDTreeAddMenuItem({'text': '(o)pen the current node with system editor', 'shortcut': 'o', 'callback': 'NERDTreeExecuteFileWindows'})
+endif
+
+if g:NERDTreePath.CopyingSupported()
+    call NERDTreeAddMenuItem({'text': '(c)opy the current node', 'shortcut': 'c', 'callback': 'NERDTreeCopyNode'})
+endif
+call NERDTreeAddMenuItem({'text': (has('clipboard')?'copy (p)ath to clipboard':'print (p)ath to screen'), 'shortcut': 'p', 'callback': 'NERDTreeCopyPath'})
+
+if has('unix') || has('osx')
+    call NERDTreeAddMenuItem({'text': '(l)ist the current node', 'shortcut': 'l', 'callback': 'NERDTreeListNode'})
+    call NERDTreeAddMenuItem({'text': '(C)hange node permissions', 'shortcut':'C', 'callback': 'NERDTreeChangePermissions'})
+else
+    call NERDTreeAddMenuItem({'text': '(l)ist the current node', 'shortcut': 'l', 'callback': 'NERDTreeListNodeWin32'})
+endif
+
+if exists('*system')
+    call NERDTreeAddMenuItem({'text': 'Run (s)ystem command in this directory', 'shortcut':'s', 'callback': 'NERDTreeSystemCommand'})
+endif
+
+"FUNCTION: s:inputPrompt(action){{{1
+"returns the string that should be prompted to the user for the given action
+"
+"Args:
+"action: the action that is being performed, e.g. 'delete'
+function! s:inputPrompt(action)
+    if a:action ==# 'add'
+        let title = 'Add a childnode'
+        let info = "Enter the dir/file name to be created. Dirs end with a '/'"
+        let minimal = 'Add node:'
+
+    elseif a:action ==# 'copy'
+        let title = 'Copy the current node'
+        let info = 'Enter the new path to copy the node to:'
+        let minimal = 'Copy to:'
+
+    elseif a:action ==# 'delete'
+        let title = 'Delete the current node'
+        let info = 'Are you sure you wish to delete the node:'
+        let minimal = 'Delete?'
+
+    elseif a:action ==# 'deleteNonEmpty'
+        let title = 'Delete the current node'
+        let info =  "STOP! Directory is not empty! To delete, type 'yes'"
+        let minimal = 'Delete directory?'
+
+    elseif a:action ==# 'move'
+        let title = 'Rename the current node'
+        let info = 'Enter the new path for the node:'
+        let minimal = 'Move to:'
+    endif
+
+    if g:NERDTreeMenuController.isMinimal()
+        redraw! " Clear the menu
+        return minimal . ' '
+    else
+        let divider = '=========================================================='
+        return title . "\n" . divider . "\n" . info . "\n"
+    end
+endfunction
+
+"FUNCTION: s:promptToDelBuffer(bufnum, msg){{{1
+"prints out the given msg and, if the user responds by pushing 'y' then the
+"buffer with the given bufnum is deleted
+"
+"Args:
+"bufnum: the buffer that may be deleted
+"msg: a message that will be echoed to the user asking them if they wish to
+"     del the buffer
+function! s:promptToDelBuffer(bufnum, msg)
+    echo a:msg
+    if g:NERDTreeAutoDeleteBuffer || nr2char(getchar()) ==# 'y'
+        " 1. ensure that all windows which display the just deleted filename
+        " now display an empty buffer (so a layout is preserved).
+        " Is not it better to close single tabs with this file only ?
+        let s:originalTabNumber = tabpagenr()
+        let s:originalWindowNumber = winnr()
+        " Go to the next buffer in buffer list if at least one extra buffer is listed
+        " Otherwise open a new empty buffer
+        if v:version >= 800
+            let l:listedBufferCount = len(getbufinfo({'buflisted':1}))
+        elseif v:version >= 702
+            let l:listedBufferCount = len(filter(range(1, bufnr('$')), 'buflisted(v:val)'))
+        else
+            " Ignore buffer count in this case to make sure we keep the old
+            " behavior
+            let l:listedBufferCount = 0
+        endif
+        if l:listedBufferCount > 1
+            call nerdtree#exec('tabdo windo if winbufnr(0) ==# ' . a:bufnum . " | exec ':bnext! ' | endif", 1)
+        else
+            call nerdtree#exec('tabdo windo if winbufnr(0) ==# ' . a:bufnum . " | exec ':enew! ' | endif", 1)
+        endif
+        call nerdtree#exec('tabnext ' . s:originalTabNumber, 1)
+        call nerdtree#exec(s:originalWindowNumber . 'wincmd w', 1)
+        " 3. We don't need a previous buffer anymore
+        call nerdtree#exec('bwipeout! ' . a:bufnum, 0)
+    endif
+endfunction
+
+"FUNCTION: s:renameBuffer(bufNum, newNodeName, isDirectory){{{1
+"The buffer with the given bufNum is replaced with a new one
+"
+"Args:
+"bufNum: the buffer that may be deleted
+"newNodeName: the name given to the renamed node
+"isDirectory: determines how to do the create the new filenames
+function! s:renameBuffer(bufNum, newNodeName, isDirectory)
+    if a:isDirectory
+        let quotedFileName = fnameescape(a:newNodeName . '/' . fnamemodify(bufname(a:bufNum),':t'))
+        let editStr = g:NERDTreePath.New(a:newNodeName . '/' . fnamemodify(bufname(a:bufNum),':t')).str({'format': 'Edit'})
+    else
+        let quotedFileName = fnameescape(a:newNodeName)
+        let editStr = g:NERDTreePath.New(a:newNodeName).str({'format': 'Edit'})
+    endif
+    let s:originalTabNumber = tabpagenr()
+    let s:originalWindowNumber = winnr()
+    let l:tempBufferName = 'NERDTreeRenameTempBuffer'
+
+    " 1. swap deleted file buffer with a temporary one
+    " this step is needed to compensate for case insensitive filesystems
+
+    " 1.1. create an intermediate(temporary) buffer
+    call nerdtree#exec('badd ' . l:tempBufferName, 0)
+    let l:tempBufNum = bufnr(l:tempBufferName)
+    " 1.2. ensure that all windows which display the just deleted filename
+    " display the new temp buffer.
+    call nerdtree#exec('tabdo windo if winbufnr(0) ==# ' . a:bufNum . " | exec ':e! " . l:tempBufferName . "' | endif", 0)
+    " 1.3. We don't need the deleted file buffer anymore
+    try
+        call nerdtree#exec('confirm bwipeout ' . a:bufNum, 0)
+    catch
+        " This happens when answering Cancel if confirmation is needed. Do nothing.
+    endtry
+
+    " 2. swap temporary buffer with the new filename buffer
+    " 2.1. create the actual new file buffer
+    call nerdtree#exec('badd ' . quotedFileName, 0)
+
+    " 2.2. ensure that all windows which display the temporary buffer
+    " display a buffer for the new filename.
+    call nerdtree#exec('tabdo windo if winbufnr(0) ==# ' . l:tempBufNum . " | exec ':e! " . editStr . "' | endif", 0)
+    call nerdtree#exec('tabnext ' . s:originalTabNumber, 1)
+    call nerdtree#exec(s:originalWindowNumber . 'wincmd w', 1)
+    " 2.3. We don't need the temporary buffer anymore
+    try
+        call nerdtree#exec('confirm bwipeout ' . l:tempBufNum, 0)
+    catch
+        " This happens when answering Cancel if confirmation is needed. Do nothing.
+    endtry
+endfunction
+
+"FUNCTION: NERDTreeAddNode(){{{1
+function! NERDTreeAddNode()
+    let curDirNode = g:NERDTreeDirNode.GetSelected()
+    let prompt = s:inputPrompt('add')
+    let newNodeName = substitute(input(prompt, curDirNode.path.str() . nerdtree#slash(), 'file'), '\(^\s*\|\s*$\)', '', 'g')
+
+    if newNodeName ==# ''
+        call nerdtree#echo('Node Creation Aborted.')
+        return
+    endif
+
+    try
+        let newPath = g:NERDTreePath.Create(newNodeName)
+        let parentNode = b:NERDTree.root.findNode(newPath.getParent())
+
+        let newTreeNode = g:NERDTreeFileNode.New(newPath, b:NERDTree)
+        " Emptying g:NERDTreeOldSortOrder forces the sort to
+        " recalculate the cached sortKey so nodes sort correctly.
+        let g:NERDTreeOldSortOrder = []
+        if empty(parentNode)
+            call b:NERDTree.root.refresh()
+            call b:NERDTree.render()
+        elseif parentNode.isOpen || !empty(parentNode.children)
+            call parentNode.addChild(newTreeNode, 1)
+            call NERDTreeRender()
+            call newTreeNode.putCursorHere(1, 0)
+        endif
+
+        redraw!
+    catch /^NERDTree/
+        call nerdtree#echoWarning('Node Not Created.')
+    endtry
+endfunction
+
+"FUNCTION: NERDTreeMoveNode(){{{1
+function! NERDTreeMoveNode()
+    let curNode = g:NERDTreeFileNode.GetSelected()
+    let prompt = s:inputPrompt('move')
+    let newNodePath = input(prompt, curNode.path.str(), 'file')
+    while filereadable(newNodePath)
+        " allow renames with different casing when g:NERDTreeCaseSensitiveFS
+        " is set to either 0 or 3 and the 2 paths are equal
+        if (g:NERDTreeCaseSensitiveFS == 0 || g:NERDTreeCaseSensitiveFS == 3) &&
+                    \nerdtree#pathEquals(curNode.path.str(), newNodePath)
+            break
+        endif
+
+        call nerdtree#echoWarning('This destination already exists, Try again.')
+
+        " inform the user about the flag if we think it is a false positive
+        " when g:NERDTreeCaseSensitiveFS is set to 2
+        if g:NERDTreeCaseSensitiveFS == 2 &&
+                    \!nerdtree#osDefaultCaseSensitiveFS() &&
+                    \nerdtree#pathEquals(curNode.path.str(), newNodePath)
+            echon "\n(If it is a false positive please consider assigning NERDTreeCaseSensitiveFS's value)"
+        endif
+
+        " prompt the user again
+        let newNodePath = substitute(input(prompt, curNode.path.str(), 'file'), '\(^\s*\|\s*$\)', '', 'g')
+    endwhile
+
+
+    if newNodePath ==# ''
+        call nerdtree#echo('Node Renaming Aborted.')
+        return
+    endif
+
+    try
+        if curNode.path.isDirectory
+            let l:curPath = escape(curNode.path.str(),'\') . (nerdtree#runningWindows()?'\\':'/') . '.*'
+            let l:openBuffers = filter(range(1,bufnr('$')),'bufexists(v:val) && fnamemodify(bufname(v:val),":p") =~# "'.escape(l:curPath,'\').'"')
+        else
+            let l:openBuffers = filter(range(1,bufnr('$')),'bufexists(v:val) && fnamemodify(bufname(v:val),":p") ==# curNode.path.str()')
+        endif
+
+        call curNode.rename(newNodePath)
+        " Emptying g:NERDTreeOldSortOrder forces the sort to
+        " recalculate the cached sortKey so nodes sort correctly.
+        let g:NERDTreeOldSortOrder = []
+        call b:NERDTree.root.refresh()
+        call NERDTreeRender()
+
+        " If the file node is open, or files under the directory node are
+        " open, ask the user if they want to replace the file(s) with the
+        " renamed files.
+        if !empty(l:openBuffers)
+            if curNode.path.isDirectory
+                echo "\nDirectory renamed.\n\nFiles with the old directory name are open in buffers " . join(l:openBuffers, ', ') . '. Replace these buffers with the new files? (yN)'
+            else
+                echo "\nFile renamed.\n\nThe old file is open in buffer " . l:openBuffers[0] . '. Replace this buffer with the new file? (yN)'
+            endif
+            if g:NERDTreeAutoDeleteBuffer || nr2char(getchar()) ==# 'y'
+                for bufNum in l:openBuffers
+                    call s:renameBuffer(bufNum, newNodePath, curNode.path.isDirectory)
+                endfor
+            endif
+        endif
+
+        call curNode.putCursorHere(1, 0)
+
+        redraw!
+    catch /^NERDTree/
+        call nerdtree#echoWarning('Node Not Renamed.')
+    endtry
+endfunction
+
+" FUNCTION: NERDTreeDeleteNode() {{{1
+function! NERDTreeDeleteNode()
+    let currentNode = g:NERDTreeFileNode.GetSelected()
+    let confirmed = 0
+
+    if currentNode.path.isDirectory && ((currentNode.isOpen && currentNode.getChildCount() > 0) ||
+                                      \ (len(currentNode._glob('*', 1)) > 0))
+        let prompt = s:inputPrompt('deleteNonEmpty') . currentNode.path.str() . ': '
+        let choice = input(prompt)
+        let confirmed = choice ==# 'yes'
+    else
+        let prompt = s:inputPrompt('delete') . currentNode.path.str() . ' (yN): '
+        echo prompt
+        let choice = nr2char(getchar())
+        let confirmed = choice ==# 'y'
+    endif
+
+    if confirmed
+        try
+            call currentNode.delete()
+            call NERDTreeRender()
+
+            "if the node is open in a buffer, ask the user if they want to
+            "close that buffer
+            let bufnum = bufnr('^'.currentNode.path.str().'$')
+            if buflisted(bufnum)
+                let prompt = "\nNode deleted.\n\nThe file is open in buffer ". bufnum . (bufwinnr(bufnum) ==# -1 ? ' (hidden)' : '') .'. Delete this buffer? (yN)'
+                call s:promptToDelBuffer(bufnum, prompt)
+            endif
+
+            redraw!
+        catch /^NERDTree/
+            call nerdtree#echoWarning('Could not remove node')
+        endtry
+    else
+        call nerdtree#echo('delete aborted')
+    endif
+endfunction
+
+" FUNCTION: NERDTreeListNode() {{{1
+function! NERDTreeListNode()
+    let treenode = g:NERDTreeFileNode.GetSelected()
+    if !empty(treenode)
+        let s:uname = system('uname')
+        let stat_cmd = 'stat -c "%s" '
+
+        if s:uname =~? 'Darwin'
+            let stat_cmd = 'stat -f "%z" '
+        endif
+
+        let cmd = 'size=$(' . stat_cmd . shellescape(treenode.path.str()) . ') && ' .
+        \         'size_with_commas=$(echo $size | sed -e :a -e "s/\(.*[0-9]\)\([0-9]\{3\}\)/\1,\2/;ta") && ' .
+        \         'ls -ld ' . shellescape(treenode.path.str()) . ' | sed -e "s/ $size / $size_with_commas /"'
+
+        let metadata = split(system(cmd),'\n')
+        call nerdtree#echo(metadata[0])
+    else
+        call nerdtree#echo('No information available')
+    endif
+endfunction
+
+" FUNCTION: NERDTreeListNodeWin32() {{{1
+function! NERDTreeListNodeWin32()
+    let l:node = g:NERDTreeFileNode.GetSelected()
+
+    if !empty(l:node)
+        let l:path = l:node.path.str()
+        call nerdtree#echo(printf('%s:%s  MOD:%s  BYTES:%d  PERMISSIONS:%s',
+                    \ toupper(getftype(l:path)),
+                    \ fnamemodify(l:path, ':t'),
+                    \ strftime('%c', getftime(l:path)),
+                    \ getfsize(l:path),
+                    \ getfperm(l:path)))
+        return
+    endif
+
+    call nerdtree#echo('node not recognized')
+endfunction
+
+" FUNCTION: NERDTreeChangePermissions() {{{1
+function! NERDTreeChangePermissions()
+    let l:node = g:NERDTreeFileNode.GetSelected()
+    let l:prompt = "change node permissions (chmod args): "
+    let l:newNodePerm = input(l:prompt)
+
+    if !empty(l:node)
+        let l:path = l:node.path.str()
+        let l:cmd = 'chmod ' .. newNodePerm .. ' ' .. path
+        let l:error = split(system(l:cmd), '\n')
+
+        if !empty(l:error)
+            call nerdtree#echo(l:error[0])
+        endif
+
+        call b:NERDTree.root.refresh()
+        call b:NERDTree.render()
+        return
+    endif
+
+    call nerdtree#echo('node not recognized')
+endfunction
+
+" FUNCTION: NERDTreeCopyNode() {{{1
+function! NERDTreeCopyNode()
+    let currentNode = g:NERDTreeFileNode.GetSelected()
+    let prompt = s:inputPrompt('copy')
+    let newNodePath = substitute(input(prompt, currentNode.path.str(), 'file'), '\(^\s*\|\s*$\)', '', 'g')
+
+    if newNodePath !=# ''
+        "strip trailing slash
+        let newNodePath = substitute(newNodePath, '\/$', '', '')
+
+        let confirmed = 1
+        if currentNode.path.copyingWillOverwrite(newNodePath)
+            call nerdtree#echo('Warning: copying may overwrite files! Continue? (yN)')
+            let choice = nr2char(getchar())
+            let confirmed = choice ==# 'y'
+        endif
+
+        if confirmed
+            try
+                let newNode = currentNode.copy(newNodePath)
+                " Emptying g:NERDTreeOldSortOrder forces the sort to
+                " recalculate the cached sortKey so nodes sort correctly.
+                let g:NERDTreeOldSortOrder = []
+                if empty(newNode)
+                    call b:NERDTree.root.refresh()
+                    call b:NERDTree.render()
+                else
+                    call NERDTreeRender()
+                    call newNode.putCursorHere(0, 0)
+                endif
+            catch /^NERDTree/
+                call nerdtree#echoWarning('Could not copy node')
+            endtry
+        endif
+    else
+        call nerdtree#echo('Copy aborted.')
+    endif
+    redraw!
+endfunction
+
+" FUNCTION: NERDTreeCopyPath() {{{1
+function! NERDTreeCopyPath()
+    let l:nodePath = g:NERDTreeFileNode.GetSelected().path.str()
+    if has('clipboard')
+        if &clipboard ==# 'unnamedplus'
+            let @+ = l:nodePath
+        else
+            let @* = l:nodePath
+        endif
+        call nerdtree#echo('The path [' . l:nodePath . '] was copied to your clipboard.')
+    else
+        call nerdtree#echo('The full path is: ' . l:nodePath)
+    endif
+endfunction
+
+" FUNCTION: NERDTreeQuickLook() {{{1
+function! NERDTreeQuickLook()
+    let l:node = g:NERDTreeFileNode.GetSelected()
+
+    if empty(l:node)
+        return
+    endif
+
+    call system('qlmanage -p 2>/dev/null ' . shellescape(l:node.path.str()))
+endfunction
+
+" FUNCTION: NERDTreeRevealInFinder() {{{1
+function! NERDTreeRevealInFinder()
+    let l:node = g:NERDTreeFileNode.GetSelected()
+
+    if empty(l:node)
+        return
+    endif
+
+    call system('open -R ' . shellescape(l:node.path.str()))
+endfunction
+
+" FUNCTION: NERDTreeExecuteFile() {{{1
+function! NERDTreeExecuteFile()
+    let l:node = g:NERDTreeFileNode.GetSelected()
+
+    if empty(l:node)
+        return
+    endif
+
+    call system('open ' . shellescape(l:node.path.str()))
+endfunction
+
+" FUNCTION: NERDTreeRevealFileLinux() {{{1
+function! NERDTreeRevealFileLinux()
+    let l:node = g:NERDTreeFileNode.GetSelected()
+
+    if empty(l:node)
+        return
+    endif
+
+    " Handle the edge case of "/", which has no parent.
+    if l:node.path.str() ==# '/'
+        call system('xdg-open /')
+        return
+    endif
+
+    if empty(l:node.parent)
+        return
+    endif
+
+    call system('xdg-open ' . shellescape(l:node.parent.path.str()))
+endfunction
+
+" FUNCTION: NERDTreeExecuteFileLinux() {{{1
+function! NERDTreeExecuteFileLinux()
+    let l:node = g:NERDTreeFileNode.GetSelected()
+
+    if empty(l:node)
+        return
+    endif
+
+    call system('xdg-open ' . shellescape(l:node.path.str()))
+endfunction
+
+" FUNCTION: NERDTreeRevealInExplorer() {{{1
+function! NERDTreeRevealInExplorer()
+    let l:node = g:NERDTreeFileNode.GetSelected()
+
+    if empty(l:node)
+        return
+    endif
+
+    call system('cmd.exe /c explorer /select, ' . shellescape(l:node.path.str()))
+endfunction
+
+" FUNCTION: NERDTreeExecuteFileWindows() {{{1
+function! NERDTreeExecuteFileWindows()
+    let l:node = g:NERDTreeFileNode.GetSelected()
+
+    if empty(l:node)
+        return
+    endif
+
+    call system('cmd.exe /c start "" ' . shellescape(l:node.path.str()))
+endfunction
+
+" FUNCTION: NERDTreeSystemCommand() {{{1
+function! NERDTreeSystemCommand()
+    let l:node = g:NERDTreeFileNode.GetSelected()
+
+    if empty(l:node)
+        return
+    endif
+
+    let l:cwd = getcwd()
+    let l:directory = l:node.path.isDirectory ? l:node.path.str() : l:node.parent.path.str()
+    execute 'cd '.l:directory
+
+    let l:nl = nr2char(10)
+    echo l:nl . system(input(l:directory . (nerdtree#runningWindows() ? '> ' : ' $ ')))
+    execute 'cd '.l:cwd
+endfunction
+
+" vim: set sw=4 sts=4 et fdm=marker:

nerdtree_plugin/vcs.vim

@@ -0,0 +1,47 @@
+" ============================================================================
+" File:        vcs.vim
+" Description: NERDTree plugin that provides a command to open on the root of
+"              a version control system repository.
+" Maintainer:  Phil Runninger
+" License:     This program is free software. It comes without any warranty,
+"              to the extent permitted by applicable law. You can redistribute
+"              it and/or modify it under the terms of the Do What The Fuck You
+"              Want To Public License, Version 2, as published by Sam Hocevar.
+"              See http://sam.zoy.org/wtfpl/COPYING for more details.
+"
+" ============================================================================
+command! -n=? -complete=dir -bar NERDTreeVCS :call <SID>CreateTabTreeVCS('<args>')
+command! -n=? -complete=dir -bar NERDTreeToggleVCS :call <SID>ToggleTabTreeVCS('<args>')
+
+" FUNCTION: s:CreateTabTreeVCS(a:name) {{{1
+function! s:CreateTabTreeVCS(name)
+    let l:path = g:NERDTreeCreator._pathForString(a:name)
+    let l:path = s:FindParentVCSRoot(l:path)
+    call g:NERDTreeCreator.createTabTree(empty(l:path) ? '' : l:path._str())
+endfunction
+
+" FUNCTION: s:ToggleTabTreeVCS(a:name) {{{1
+" Behaves the same as ToggleTabTree except roots directory at VCS root
+function! s:ToggleTabTreeVCS(name)
+    let l:path = g:NERDTreeCreator._pathForString(a:name)
+    let l:path = s:FindParentVCSRoot(l:path)
+    call g:NERDTreeCreator.toggleTabTree(empty(l:path) ? '' : l:path._str())
+endfunction
+
+" FUNCTION: s:FindParentVCSRoot(a:path) {{{1
+" Finds the root version control system folder of the given path. If a:path is
+" not part of a repository, return the original path.
+function! s:FindParentVCSRoot(path)
+    let l:path = a:path
+    while !empty(l:path) &&
+        \ l:path._str() !~# '^\(\a:[\\\/]\|\/\)$' &&
+        \ !isdirectory(l:path._str() . '/.git') &&
+        \ !isdirectory(l:path._str() . '/.svn') &&
+        \ !isdirectory(l:path._str() . '/.hg') &&
+        \ !isdirectory(l:path._str() . '/.bzr') &&
+        \ !isdirectory(l:path._str() . '/_darcs')
+        let l:path = l:path.getParent()
+    endwhile
+    return (empty(l:path) || l:path._str() =~# '^\(\a:[\\\/]\|\/\)$') ? a:path : l:path
+endfunction
+

syntax/nerdtree.vim

@@ -0,0 +1,97 @@
+let s:tree_up_dir_line = '.. (up a dir)'
+syn match NERDTreeIgnore #\~#
+exec 'syn match NERDTreeIgnore #\['.g:NERDTreeGlyphReadOnly.'\]#'
+
+"highlighting for the .. (up dir) line at the top of the tree
+execute "syn match NERDTreeUp #\\V". s:tree_up_dir_line .'#'
+
+"quickhelp syntax elements
+syn match NERDTreeHelpKey #" \{1,2\}[^ ]*:#ms=s+2,me=e-1
+syn match NERDTreeHelpKey #" \{1,2\}[^ ]*,#ms=s+2,me=e-1
+syn match NERDTreeHelpTitle #" .*\~$#ms=s+2,me=e-1
+syn match NERDTreeToggleOn #(on)#ms=s+1,he=e-1
+syn match NERDTreeToggleOff #(off)#ms=e-3,me=e-1
+syn match NERDTreeHelpCommand #" :.\{-}\>#hs=s+3
+syn match NERDTreeHelp  #^".*# contains=NERDTreeHelpKey,NERDTreeHelpTitle,NERDTreeIgnore,NERDTreeToggleOff,NERDTreeToggleOn,NERDTreeHelpCommand
+
+"highlighting for sym links
+syn match NERDTreeLinkTarget #->.*# containedin=NERDTreeDir,NERDTreeFile
+syn match NERDTreeLinkFile #.* ->#me=e-3 containedin=NERDTreeFile
+syn match NERDTreeLinkDir #.*/ ->#me=e-3 containedin=NERDTreeDir
+
+"highlighting to conceal the delimiter around the file/dir name
+if has('conceal')
+    exec 'syn match NERDTreeNodeDelimiters #\%d' . char2nr(g:NERDTreeNodeDelimiter) . '# conceal containedin=ALL'
+    setlocal conceallevel=2 concealcursor=nvic
+else
+    exec 'syn match NERDTreeNodeDelimiters #\%d' . char2nr(g:NERDTreeNodeDelimiter) . '# containedin=ALL'
+    hi! link NERDTreeNodeDelimiters Ignore
+endif
+
+"highlighting for directory nodes and file nodes
+syn match NERDTreeDirSlash #/# containedin=NERDTreeDir
+
+if g:NERDTreeDirArrowExpandable !=# ''
+    exec 'syn match NERDTreeClosable #' . escape(g:NERDTreeDirArrowCollapsible, '~') . '\ze .*/# containedin=NERDTreeDir,NERDTreeFile'
+    exec 'syn match NERDTreeOpenable #' . escape(g:NERDTreeDirArrowExpandable, '~') . '\ze .*/# containedin=NERDTreeDir,NERDTreeFile'
+    let s:dirArrows = escape(g:NERDTreeDirArrowCollapsible, '~]\-').escape(g:NERDTreeDirArrowExpandable, '~]\-')
+    exec 'syn match NERDTreeDir #[^'.s:dirArrows.' ].*/#'
+    exec 'syn match NERDTreeExecFile #^.*'.g:NERDTreeNodeDelimiter.'\*\($\| \)# contains=NERDTreeRO,NERDTreeBookmarkName'
+    exec 'syn match NERDTreeFile  #^[^"\.'.s:dirArrows.'] *[^'.s:dirArrows.']*# contains=NERDTreeLink,NERDTreeRO,NERDTreeBookmarkName,NERDTreeExecFile'
+else
+    exec 'syn match NERDTreeDir #[^'.g:NERDTreeNodeDelimiter.']\{-}/\ze\($\|'.g:NERDTreeNodeDelimiter.'\)#'
+    exec 'syn match NERDTreeExecFile #[^'.g:NERDTreeNodeDelimiter.']\{-}'.g:NERDTreeNodeDelimiter.'\*\($\| \)# contains=NERDTreeRO,NERDTreeBookmarkName'
+    exec 'syn match NERDTreeFile     #^.*'.g:NERDTreeNodeDelimiter.'.*[^\/]\($\|'.g:NERDTreeNodeDelimiter.'.*\)# contains=NERDTreeLink,NERDTreeRO,NERDTreeBookmarkName,NERDTreeExecFile'
+endif
+
+"highlighting for readonly files
+exec 'syn match NERDTreeRO #.*'.g:NERDTreeNodeDelimiter.'\zs.*\ze'.g:NERDTreeNodeDelimiter.'.*\['.g:NERDTreeGlyphReadOnly.'\]# contains=NERDTreeIgnore,NERDTreeBookmarkName,NERDTreeFile'
+
+exec 'syn match NERDTreeFlags #\[[^\]]*\]\ze'.g:NERDTreeNodeDelimiter.'# containedin=NERDTreeFile,NERDTreeExecFile,NERDTreeLinkFile,NERDTreeRO,NERDTreeDir'
+
+syn match NERDTreeCWD #^[</].*$#
+
+"highlighting for bookmarks
+syn match NERDTreeBookmarkName # {.*}#hs=s+2,he=e-1
+
+"highlighting for the bookmarks table
+syn match NERDTreeBookmarksLeader #^>#
+syn match NERDTreeBookmarksHeader #^>-\+Bookmarks-\+$# contains=NERDTreeBookmarksLeader
+syn match NERDTreeBookmarkName #^>.\{-} #he=e-1 contains=NERDTreeBookmarksLeader
+syn match NERDTreeBookmark #^>.*$# contains=NERDTreeBookmarksLeader,NERDTreeBookmarkName,NERDTreeBookmarksHeader
+
+hi def link NERDTreePart Special
+hi def link NERDTreePartFile Type
+hi def link NERDTreeExecFile Title
+hi def link NERDTreeDirSlash Identifier
+
+hi def link NERDTreeBookmarksHeader statement
+hi def link NERDTreeBookmarksLeader ignore
+hi def link NERDTreeBookmarkName Identifier
+hi def link NERDTreeBookmark normal
+
+hi def link NERDTreeHelp String
+hi def link NERDTreeHelpKey Identifier
+hi def link NERDTreeHelpCommand Identifier
+hi def link NERDTreeHelpTitle Macro
+hi def link NERDTreeToggleOn Question
+hi def link NERDTreeToggleOff WarningMsg
+
+hi def link NERDTreeLinkTarget Type
+hi def link NERDTreeLinkFile Macro
+hi def link NERDTreeLinkDir Macro
+
+hi def link NERDTreeDir Directory
+hi def link NERDTreeUp Directory
+hi def link NERDTreeFile Normal
+hi def link NERDTreeCWD Statement
+hi def link NERDTreeOpenable Directory
+hi def link NERDTreeClosable Directory
+hi def link NERDTreeIgnore ignore
+hi def link NERDTreeRO WarningMsg
+hi def link NERDTreeBookmark Statement
+hi def link NERDTreeFlags Number
+
+hi def link NERDTreeCurrentNode Search
+
+hi NERDTreeFile ctermbg=NONE guibg=NONE