Implement live interactive mode (#15)

This commit adds LiveEasyAlign command. (The name was chosen not to introduce
ambiguity when typing in only the prefix of the command: e.g. `:EasyA*|`)
In live interactive mode, the selected text is aligned on-the-fly as the user
type in. In order to finalize the alignment, the user has to type in the
same delimiter key again. (Or CTRL-X on regular expressions)

README.md

@@ -60,6 +60,7 @@ variant `:EasyAlign!`) for visual mode.
 | Interactive mode          | `:EasyAlign[!] [OPTIONS]`                        |
 | Using predefined rules    | `:EasyAlign[!] [N-th] DELIMITER_KEY [OPTIONS]`   |
 | Using regular expressions | `:EasyAlign[!] [N-th] /REGEXP/ [OPTIONS]`        |
+| Live interactive mode     | `:LiveEasyAlign[!] [...]`                        |
 
 ### Concept of _alignment rule_
 
@@ -168,17 +169,24 @@ repeatable, non-interactive command recorded in `g:easy_align_last_command`.
 :<C-R>=g:easy_align_last_command<Enter><Enter>
 ```
 
----
+### Live interactive mode
 
-### *Intermission*
+If you're performing a complex alignment where multiple options should be
+carefully adjusted, try "live interactive mode" which aligns the text on-the-fly
+as you type in.
 
-You can stop reading here. Trust me. All the fancy features described in the
+Live interactive mode can be started with `:LiveEasyAlign` command which takes
-following sections are really powerful but you won't be needing them in most
+the same parameters as `:EasyAlign`. I suggest you define the following mapping
-of the cases.
+in addition to the one for `:EasyAlign` command.
 
-Go try out vim-easy-align right now, and come back later when you feel like it.
+```vim
+vnoremap <silent> <Leader><Enter> :LiveEasyAlign<Enter>
+```
 
----
+In live interactive mode, you have to type in the same delimiter (or `CTRL-X` on
+regular expression) again to finalize the alignment. This allows you to preview
+the result of the alignment and freely change the delimiter using backspace key
+without leaving the interactive mode.
 
 ### Using `EasyAlign` in command line
 

autoload/easy_align.vim

@@ -326,13 +326,13 @@ function! s:split_line(line, nth, modes, cycle, fc, lc, pattern, stick_to_left,
   return [tokens, delims]
 endfunction
 
-function! s:do_align(todo, modes, all_tokens, all_delims, fl, ll, fc, lc, pattern, nth,
+function! s:do_align(todo, modes, all_tokens, all_delims, fl, ll, fc, lc, nth, recur, dict)
-      \ ml, mr, da, indentation, stick_to_left, ignore_unmatched, ignore_groups, recur)
   let mode       = a:modes[0]
   let lines      = {}
   let min_indent = -1
   let max = { 'pivot_len': 0.0, 'token_len': 0, 'just_len': 0, 'delim_len': 0,
         \ 'indent': 0, 'tokens': 0, 'strip_len': 0 }
+  let d = a:dict
 
   " Phase 1
   for line in range(a:fl, a:ll)
@@ -340,8 +340,8 @@ function! s:do_align(todo, modes, all_tokens, all_delims, fl, ll, fc, lc, patter
       " Split line into the tokens by the delimiters
       let [tokens, delims] = s:split_line(
             \ line, a:nth, copy(a:modes), a:recur == 2,
-            \ a:fc, a:lc, a:pattern,
+            \ a:fc, a:lc, d.pattern,
-            \ a:stick_to_left, a:ignore_unmatched, a:ignore_groups)
+            \ d.stick_to_left, d.ignore_unmatched, d.ignore_groups)
 
       " Remember tokens for subsequent recursive calls
       let a:all_tokens[line] = tokens
@@ -383,7 +383,7 @@ function! s:do_align(todo, modes, all_tokens, all_delims, fl, ll, fc, lc, patter
     let delim  = delims[nth]
     let token  = s:rtrim( tokens[nth] )
     let token  = s:rtrim( strpart(token, 0, len(token) - len(s:rtrim(delim))) )
-    if empty(delim) && !exists('tokens[nth + 1]') && a:ignore_unmatched
+    if empty(delim) && !exists('tokens[nth + 1]') && d.ignore_unmatched
       continue
     endif
 
@@ -409,17 +409,18 @@ function! s:do_align(todo, modes, all_tokens, all_delims, fl, ll, fc, lc, patter
 
   " Phase 1-5: indentation handling (only on a:nth == 1)
   if a:nth == 1
-    if a:indentation ==? 'd'
+    let idt = d.indentation
+    if idt ==? 'd'
       let indent = repeat(' ', max.indent)
-    elseif a:indentation ==? 's'
+    elseif idt ==? 's'
       let indent = repeat(' ', min_indent)
-    elseif a:indentation ==? 'n'
+    elseif idt ==? 'n'
       let indent = ''
-    elseif a:indentation !=? 'k'
+    elseif idt !=? 'k'
-      call s:exit('Invalid indentation: ' . a:indentation)
+      call s:exit('Invalid indentation: ' . idt)
     end
 
-    if a:indentation !=? 'k'
+    if idt !=? 'k'
       let max.just_len  = 0
       let max.token_len = 0
       let max.pivot_len = 0
@@ -461,7 +462,7 @@ function! s:do_align(todo, modes, all_tokens, all_delims, fl, ll, fc, lc, patter
     let rpad = ''
     if mode ==? 'l'
       let pad = repeat(' ', max.just_len - pw - tw)
-      if a:stick_to_left
+      if d.stick_to_left
         let rpad = pad
       else
         let token = token . pad
@@ -480,7 +481,7 @@ function! s:do_align(todo, modes, all_tokens, all_delims, fl, ll, fc, lc, patter
       let token = repeat(' ', float2nr(pf1)) .token. repeat(' ', float2nr(p2))
       let token = substitute(token, repeat(' ', strip) . '$', '', '')
 
-      if a:stick_to_left
+      if d.stick_to_left
         if empty(s:rtrim(token))
           let center = len(token) / 2
           let [token, rpad] = [strpart(token, 0, center), strpart(token, center)]
@@ -493,15 +494,16 @@ function! s:do_align(todo, modes, all_tokens, all_delims, fl, ll, fc, lc, patter
 
     " Pad the delimiter
     let dpadl = max.delim_len - s:strwidth(delim)
-    if a:da ==? 'l'
+    let da = d.delimiter_align
+    if da ==? 'l'
       let [dl, dr] = ['', repeat(' ', dpadl)]
-    elseif a:da ==? 'c'
+    elseif da ==? 'c'
       let dl = repeat(' ', dpadl / 2)
       let dr = repeat(' ', dpadl - dpadl / 2)
-    elseif a:da ==? 'r'
+    elseif da ==? 'r'
       let [dl, dr] = [repeat(' ', dpadl), '']
     else
-      call s:exit('Invalid delimiter_align: ' . a:da)
+      call s:exit('Invalid delimiter_align: ' . da)
     endif
 
     " Before and after the range (for blockwise visual mode)
@@ -511,8 +513,8 @@ function! s:do_align(todo, modes, all_tokens, all_delims, fl, ll, fc, lc, patter
 
     " Determine the left and right margin around the delimiter
     let rest    = join(tokens[nth + 1 : -1], '')
-    let ml      = empty(prefix . token) ? '' : a:ml
+    let ml      = empty(prefix . token) ? '' : d.ml
-    let mr      = empty(rest.after) ? '' : a:mr
+    let mr      = empty(rest.after) ? '' : d.mr
 
     " Adjust indentation of the lines starting with a delimiter
     let lpad = ''
@@ -535,12 +537,8 @@ function! s:do_align(todo, modes, all_tokens, all_delims, fl, ll, fc, lc, patter
 
   if a:nth < max.tokens && (a:recur || len(a:modes) > 1)
     call s:shift(a:modes, a:recur == 2)
-    return [
+    return [a:todo, a:modes, a:all_tokens, a:all_delims,
-          \ a:todo,
+          \ a:fl, a:ll, a:fc, a:lc, a:nth + 1, a:recur, a:dict]
-          \ a:modes, a:all_tokens, a:all_delims,
-          \ a:fl, a:ll, a:fc, a:lc, a:pattern,
-          \ a:nth + 1, a:ml, a:mr, a:da, a:indentation, a:stick_to_left,
-          \ a:ignore_unmatched, a:ignore_groups, a:recur]
   endif
   return [a:todo]
 endfunction
@@ -571,26 +569,56 @@ function! s:shift_opts(opts, key, vals)
   endif
 endfunction
 
-function! s:interactive(modes, vis, opts, delims)
+function! s:interactive(range, modes, n, d, opts, rules, vis, live)
   let mode = s:shift(a:modes, 1)
-  let n    = ''
+  let n    = a:n
+  let d    = a:d
   let ch   = ''
   let opts = s:compact_options(a:opts)
   let vals = deepcopy(s:option_values)
   let regx = 0
   let warn = ''
+  let undo = 0
 
   while 1
-    call s:echon(mode, n, -1, '', opts, warn)
+    " Live preview
+    let rdrw = 0
+    if undo
+      silent! undo
+      let undo = 0
+      let rdrw = 1
+    endif
+    if a:live && !empty(d)
+      let output = s:process(a:range, mode, n, d, s:normalize_options(opts), regx, a:rules, 0)
+      let &undolevels = &undolevels " Break undo block
+      call s:update_lines(output.todo)
+      let undo = 1
+      let rdrw = 1
+    endif
+    if rdrw
+      if a:vis
+        normal! gv
+      endif
+      redraw
+      if a:vis | execute "normal! \<esc>" | endif
+    endif
+    call s:echon(mode, n, -1, regx ? '/'.d.'/' : d, opts, warn)
+
     let check = 0
     let warn = ''
 
     let c  = getchar()
     let ch = nr2char(c)
     if c == 3 || c == 27 " CTRL-C / ESC
+      if undo
+        silent! undo
+      endif
       throw 'exit'
     elseif c == "\<bs>"
-      if len(n) > 0
+      if !empty(d)
+        let d = ''
+        let regx = 0
+      elseif len(n) > 0
         let n = strpart(n, 0, len(n) - 1)
       endif
     elseif c == 13 " Enter key
@@ -609,7 +637,7 @@ function! s:interactive(modes, vis, opts, delims)
       elseif n == '**' | let n = ''
       else             | let check = 1
       endif
-    elseif (c == 48 && len(n) > 0) || c > 48 && c <= 57 " Numbers
+    elseif empty(d) && ((c == 48 && len(n) > 0) || c > 48 && c <= 57) " Numbers
       if n[0] == '*'   | let check = 1
       else             | let n = n . ch
       end
@@ -661,11 +689,16 @@ function! s:interactive(modes, vis, opts, delims)
         silent! call remove(opts, 'm')
       endif
     elseif ch == "\<C-_>" || ch == "\<C-X>"
+      if a:live && regx && !empty(d)
+        break
+      endif
+
       let prompt = 'Regular expression: '
       let ch = s:input(prompt, '', a:vis)
       if !empty(ch) && s:valid_regexp(ch)
         let regx = 1
-        break
+        let d = ch
+        if !a:live | break | endif
       else
         let warn = 'Invalid regular expression: '.ch
       endif
@@ -676,14 +709,33 @@ function! s:interactive(modes, vis, opts, delims)
     endif
 
     if check
-      if has_key(a:delims, ch)
+      if empty(d)
+        if has_key(a:rules, ch)
+          let d = ch
+          if !a:live
             break
+          endif
         else
           let warn = 'Unknown delimiter key: '.ch
         endif
+      else
+        if regx
+          let warn = 'Press <CTRL-X> to finish'
+        else
+          if d == ch
+            break
+          else
+            let warn = 'Press '''.d.''' again to finish'
+          endif
+        end
+      endif
     endif
   endwhile
-  return [mode, n, ch, s:normalize_options(opts), regx]
+  if a:live
+    let copts = call('s:summarize', output.summarize)
+    let g:easy_align_last_command = s:echon('', n, regx, d, copts, '')
+  end
+  return [mode, n, ch, opts, regx]
 endfunction
 
 function! s:valid_regexp(regexp)
@@ -751,6 +803,9 @@ function! s:parse_shorthand_opts(expr)
 endfunction
 
 function! s:parse_args(args)
+  if empty(a:args)
+    return ['', '', {}, 0]
+  endif
   let n    = ''
   let ch   = ''
   let args = a:args
@@ -804,55 +859,42 @@ function! s:parse_args(args)
     return [matches[1], s:test_regexp(matches[2]), opts, 1]
   else
     let tokens = matchlist(args, '^\([1-9][0-9]*\|-[0-9]*\|\*\*\?\)\?\s*\(.\{-}\)\?$')
-    return [tokens[1], tokens[2], opts, 0]
+    " Try swapping n and ch
+    let [n, ch] = empty(tokens[2]) ? reverse(tokens[1:2]) : tokens[1:2]
+
+    " Resolving command-line ambiguity
+    " '\ ' => ' '
+    " '\'  => ' '
+    if ch =~ '^\\\s*$'
+      let ch = ' '
+    " '\\' => '\'
+    elseif ch =~ '^\\\\\s*$'
+      let ch = '\'
+    endif
+
+    return [n, ch, opts, 0]
   endif
 endfunction
 
-function! s:modes(bang)
+function! s:interactive_modes(bang)
   return get(g:,
     \ (a:bang ? 'easy_align_bang_interactive_modes' : 'easy_align_interactive_modes'),
     \ (a:bang ? ['r', 'l', 'c'] : ['l', 'r', 'c']))
 endfunction
 
 function! s:alternating_modes(mode)
-  return a:mode ==? 'r' ? ['r', 'l'] : ['l', 'r']
+  return a:mode ==? 'r' ? 'rl' : 'lr'
 endfunction
 
-function! easy_align#align(bang, expr) range
+function! s:update_lines(todo)
-  try
+    for [line, content] in items(a:todo)
-    call s:align(a:bang, a:firstline, a:lastline, a:expr)
+      call setline(line, s:rtrim(content))
-  catch 'exit'
+    endfor
-  endtry
 endfunction
 
-function! s:align(bang, first_line, last_line, expr)
+function! s:parse_nth(n)
-  let modes  = s:modes(a:bang)
+  let n = a:n
-  let mode   = modes[0]
   let recur = 0
-  let n      = ''
-  let ch     = ''
-  let opts   = {}
-  let regexp = 0
-  " Heuristically determine if the user was in visual mode
-  let vis    = a:first_line == line("'<") && a:last_line == line("'>")
-
-  let delimiters = s:easy_align_delimiters_default
-  if exists('g:easy_align_delimiters')
-    let delimiters = extend(copy(delimiters), g:easy_align_delimiters)
-  endif
-
-  if empty(a:expr)
-    let [mode, n, ch, opts, regexp] = s:interactive(copy(modes), vis, opts, delimiters)
-  else
-    let [n, ch, opts, regexp] = s:parse_args(a:expr)
-    if empty(n) && empty(ch)
-      let [mode, n, ch, opts, regexp] = s:interactive(copy(modes), vis, opts, delimiters)
-    elseif empty(ch)
-      " Try swapping n and ch
-      let [n, ch] = ['', n]
-    endif
-  endif
-
   if n == '*'      | let [nth, recur] = [1, 1]
   elseif n == '**' | let [nth, recur] = [1, 2]
   elseif n == '-'  | let nth = -1
@@ -862,93 +904,134 @@ function! s:align(bang, first_line, last_line, expr)
   else
     let nth = n
   endif
+  return [nth, recur]
+endfunction
 
-  if regexp
+function! s:build_dict(delimiters, ch, regexp, opts)
-    let dict = { 'pattern': ch }
+  if a:regexp
+    let dict = { 'pattern': a:ch }
   else
-    " Resolving command-line ambiguity
+    if !has_key(a:delimiters, a:ch)
-    if !empty(a:expr)
+      call s:exit('Unknown delimiter key: '. a:ch)
-      " '\ ' => ' '
-      " '\'  => ' '
-      if ch =~ '^\\\s*$'
-        let ch = ' '
-      " '\\' => '\'
-      elseif ch =~ '^\\\\\s*$'
-        let ch = '\'
     endif
+    let dict = copy(a:delimiters[a:ch])
   endif
-    if !has_key(delimiters, ch)
+  call extend(dict, a:opts)
-      call s:exit('Unknown delimiter key: '. ch)
-    endif
-    let dict = copy(delimiters[ch])
-  endif
-
-  call extend(dict, opts)
 
   let ml = get(dict, 'left_margin', ' ')
   let mr = get(dict, 'right_margin', ' ')
   if type(ml) == 0 | let ml = repeat(' ', ml) | endif
   if type(mr) == 0 | let mr = repeat(' ', mr) | endif
+  call extend(dict, { 'ml': ml, 'mr': mr })
 
-  let bvisual = vis && char2nr(visualmode()) == 22 " ^V
+  let dict.pattern = get(dict, 'pattern', a:ch)
+  let dict.delimiter_align =
+    \ get(dict, 'delimiter_align', get(g:, 'easy_align_delimiter_align', 'r'))[0]
+  let dict.indentation =
+    \ get(dict, 'indentation', get(g:, 'easy_align_indentation', 'k'))[0]
+  let dict.stick_to_left =
+    \ get(dict, 'stick_to_left', 0)
+  let dict.ignore_unmatched =
+    \ get(dict, 'ignore_unmatched', get(g:, 'easy_align_ignore_unmatched', 2))
+  let dict.ignore_groups =
+    \ get(dict, 'ignore_groups', get(dict, 'ignores', s:ignored_syntax()))
+  return dict
+endfunction
 
-  if recur && bvisual
+function! s:build_mode_sequence(expr, recur)
+  let [expr, recur] = [a:expr, a:recur]
+  let suffix = matchstr(a:expr, '\*\+$')
+  if suffix == '*'
+    let expr = expr[0 : -2]
+    let recur = 1
+  elseif suffix == '**'
+    let expr = expr[0 : -3]
+    let recur = 2
+  endif
+  return [tolower(expr), recur]
+endfunction
+
+function! s:process(range, mode, n, ch, opts, regexp, rules, bvis)
+  let [nth, recur] = s:parse_nth(a:n)
+  let dict = s:build_dict(a:rules, a:ch, a:regexp, a:opts)
+  let [mode_sequence, recur] = s:build_mode_sequence(
+    \ get(dict, 'mode_sequence', recur == 2 ? s:alternating_modes(a:mode) : a:mode),
+    \ recur)
+
+  if recur && a:bvis
     call s:exit('Recursive alignment is not supported in blockwise-visual mode')
   endif
 
-  let aseq = get(dict, 'mode_sequence',
-        \ recur == 2 ? s:alternating_modes(mode) : [mode])
-  let mode_expansion = matchstr(aseq, '\*\+$')
-  if mode_expansion == '*'
-    let aseq = aseq[0 : -2]
-    let recur = 1
-  elseif mode_expansion == '**'
-    let aseq = aseq[0 : -3]
-    let recur = 2
-  endif
-  let aseq_list = type(aseq) == 1 ? split(tolower(aseq), '\s*') : map(copy(aseq), 'tolower(v:val)')
-  let aseq_str = join(aseq_list, '')
-
-  let todo = {}
   let args = [
-    \ todo,
+    \ {}, split(mode_sequence, '\zs'),
-    \ aseq_list,
+    \ {}, {}, a:range[0], a:range[1],
-    \ {}, {}, a:first_line, a:last_line,
+    \ a:bvis ? min([col("'<"), col("'>")]) : 1,
-    \ bvisual ? min([col("'<"), col("'>")]) : 1,
+    \ a:bvis ? max([col("'<"), col("'>")]) : 0,
-    \ bvisual ? max([col("'<"), col("'>")]) : 0,
+    \ nth, recur, dict ]
-    \ get(dict, 'pattern', ch),
-    \ nth,
-    \ ml,
-    \ mr,
-    \ get(dict, 'delimiter_align', get(g:, 'easy_align_delimiter_align', 'r'))[0],
-    \ get(dict, 'indentation', get(g:, 'easy_align_indentation', 'k'))[0],
-    \ get(dict, 'stick_to_left', 0),
-    \ get(dict, 'ignore_unmatched', get(g:, 'easy_align_ignore_unmatched', 2)),
-    \ get(dict, 'ignore_groups', get(dict, 'ignores', s:ignored_syntax())),
-    \ recur ]
   while len(args) > 1
     let args = call('s:do_align', args)
   endwhile
 
+  " todo: lines to update
+  " summarize: arguments to s:summarize
+  return { 'todo': args[0], 'summarize': [ a:opts, recur, mode_sequence ] }
+endfunction
+
+function s:summarize(opts, recur, mode_sequence)
+  let copts = s:compact_options(a:opts)
+  let nbmode = s:interactive_modes(0)[0]
+  if !has_key(copts, 'm') && (
+    \  (a:recur == 2 && s:alternating_modes(nbmode) != a:mode_sequence) ||
+    \  (a:recur != 2 && (a:mode_sequence[0] != nbmode || len(a:mode_sequence) > 1))
+    \ )
+    call extend(copts, { 'm': a:mode_sequence })
+  endif
+  return copts
+endfunction
+
+function! s:align(bang, live, first_line, last_line, expr)
+  " Heuristically determine if the user was in visual mode
+  let vis   = a:first_line == line("'<") && a:last_line == line("'>")
+  let bvis  = vis && char2nr(visualmode()) == 22 " ^V
+  let range = [a:first_line, a:last_line]
+  let modes = s:interactive_modes(a:bang)
+  let mode  = modes[0]
+
+  if bvis && a:live
+    call s:exit('Live mode is not supported in blockwise-visual mode')
+  endif
+
+  let rules = s:easy_align_delimiters_default
+  if exists('g:easy_align_delimiters')
+    let rules = extend(copy(rules), g:easy_align_delimiters)
+  endif
+
+  let [n, ch, opts, regexp] = s:parse_args(a:expr)
+
   let bypass_fold = get(g:, 'easy_align_bypass_fold', 0)
   let ofm = &l:foldmethod
   try
     if bypass_fold | let &l:foldmethod = 'manual' | endif
-    for [line, content] in items(todo)
+
-      call setline(line, s:rtrim(content))
+    if empty(n) && empty(ch) || a:live
-    endfor
+      let [mode, n, ch, opts, regexp] = s:interactive(range, copy(modes), n, ch, opts, rules, vis, a:live)
+    endif
+
+    if !a:live
+      let output = s:process(range, mode, n, ch, s:normalize_options(opts), regexp, rules, bvis)
+      call s:update_lines(output.todo)
+      let copts = call('s:summarize', output.summarize)
+      let g:easy_align_last_command = s:echon('', n, regexp, ch, copts, '')
+    endif
   finally
     if bypass_fold | let &l:foldmethod = ofm | endif
   endtry
-
+endfunction
-  let copts = s:compact_options(opts)
+
-  let nbmode = s:modes(0)[0]
+function! easy_align#align(bang, live, expr) range
-  if !has_key(copts, 'm') && (
+  try
-    \  (recur == 2 && join(s:alternating_modes(nbmode), '') != aseq_str) ||
+    call s:align(a:bang, a:live, a:firstline, a:lastline, a:expr)
-    \  (recur != 2 && (aseq_str[0] != nbmode || len(aseq_str) > 1))
+  catch 'exit'
-    \ )
+  endtry
-    call extend(copts, { 'm': aseq_str })
-  endif
-  let g:easy_align_last_command = s:echon('', n, regexp, ch, copts, '')
 endfunction
 

doc/easy_align.txt

@@ -108,6 +108,25 @@ repeatable, non-interactive command recorded in `g:easy_align_last_command`.
     :<C-R>=g:easy_align_last_command<Enter><Enter>
 
 
+Live interactive mode                  *:LiveEasyAlign* *:LiveEasyAlign!*
+-------------------------------------------------------------------------
+
+If you're performing a complex alignment where multiple options should be
+carefully adjusted, try "live interactive mode" which aligns the text
+on-the-fly as you type in.
+
+Live interactive mode can be started with `:LiveEasyAlign` command which
+takes the same parameters as `:EasyAlign`. I suggest you define the
+following mapping in addition to the one for `:EasyAlign` command.
+
+    vnoremap <silent> <Leader><Enter> :LiveEasyAlign<Enter>
+
+In live interactive mode, you have to type in the same delimiter (or
+`CTRL-X` on regular expression) again to finalize the alignment. This
+allows you to preview the result of the alignment and freely change the
+delimiter using backspace key without leaving the interactive mode.
+
+
 Left/right/center mode switch in interactive mode
 -------------------------------------------------------------------------
                                          *g:easy_align_interactive_modes*

plugin/easy_align.vim

@@ -26,4 +26,5 @@ if exists("g:loaded_easy_align_plugin")
 endif
 let g:loaded_easy_align_plugin = 1
 
-command! -nargs=* -range -bang EasyAlign <line1>,<line2>call easy_align#align('<bang>' == '!', <q-args>)
+command! -nargs=* -range -bang EasyAlign <line1>,<line2>call easy_align#align('<bang>' == '!', 0, <q-args>)
+command! -nargs=* -range -bang LiveEasyAlign <line1>,<line2>call easy_align#align('<bang>' == '!', 1, <q-args>)

test/commandline.vader

@@ -16,6 +16,7 @@ Given (fruits):
 
 Execute (regular expression):
   %EasyAlign/[:;]\+/
+  AssertEqual ':EasyAlign /[:;]\+/', g:easy_align_last_command
 
 Expect:
   apple ;:;; banana::cake

test/interactive.vader

@@ -3,6 +3,7 @@ Execute (Clean up test environment):
   Save g:easy_align_indentation,       g:easy_align_delimiter_align
   Save g:easy_align_interactive_modes, g:easy_align_bang_interactive_modes
   Save g:easy_align_delimiters
+  Save mapleader
 
   " TODO: revert after test
   silent! unlet g:easy_align_ignore_groups
@@ -13,8 +14,11 @@ Execute (Clean up test environment):
   silent! unlet g:easy_align_bang_interactive_modes
 
   let g:easy_align_delimiters = {}
+  let mapleader = ' '
   vnoremap <silent> <Enter>          :EasyAlign<Enter>
-  vnoremap <silent> <Space><Enter> :EasyAlign!<Enter>
+  vnoremap <silent> r<Enter>         :EasyAlign!<Enter>
+  vnoremap <silent> <Leader><Enter>  :LiveEasyAlign<Enter>
+  vnoremap <silent> <Leader>r<Enter> :LiveEasyAlign!<Enter>
 
 ###########################################################
 
@@ -477,6 +481,62 @@ Expect:
   |batch_size|Fixnum |    nil|number of maximum items to be assigned at once|
   |logger    |Logger |    nil|logger instance for debug logs                |
 
+Do (live interactive mode):
+  vip\<Space>\<Enter>
+  |
+  \<C-L>(\<Enter>
+  \<C-R>)\<Enter>
+  ***
+  **
+  \<BS>\<BS>\<BS>
+  **|\<Enter>|
+
+Expect:
+  |)Option    (|)   Type(|)Default(|)                                   Description(|
+  |)--        (|)     --(|)--     (|)                                            --(|
+  |)threads   (|) Fixnum(|)1      (|)          number of threads in the thread pool(|
+  |)queues    (|) Fixnum(|)1      (|)                   number of concurrent queues(|
+  |)queue_size(|) Fixnum(|)1000   (|)                            size of each queue(|
+  |)interval  (|)Numeric(|)0      (|)      dispatcher interval for batch processing(|
+  |)batch     (|)Boolean(|)false  (|)                 enables batch processing mode(|
+  |)batch_size(|) Fixnum(|)nil    (|)number of maximum items to be assigned at once(|
+  |)logger    (|) Logger(|)nil    (|)                logger instance for debug logs(|
+
+Do (live interactive mode!):
+  vip\<Space>r\<Enter>
+  |
+  \<C-L>[\<Enter>
+  \<C-R>]\<Enter>
+  ***
+  **
+  \<BS>\<BS>\<BS>
+  **
+  \<C-I>\<C-I>
+  \<C-X>|\<Enter>
+  \<Enter>
+  \<C-X>
+
+Expect:
+   [|]    Option[|]Type   [|]Default[|]Description                                   [|[
+   [|]        --[|]--     [|]     --[|]--                                            [|[
+   [|]   threads[|]Fixnum [|]      1[|]number of threads in the thread pool          [|[
+   [|]    queues[|]Fixnum [|]      1[|]number of concurrent queues                   [|[
+   [|]queue_size[|]Fixnum [|]   1000[|]size of each queue                            [|[
+   [|]  interval[|]Numeric[|]      0[|]dispatcher interval for batch processing      [|[
+   [|]     batch[|]Boolean[|]  false[|]enables batch processing mode                 [|[
+   [|]batch_size[|]Fixnum [|]    nil[|]number of maximum items to be assigned at once[|[
+   [|]    logger[|]Logger [|]    nil[|]logger instance for debug logs                [|[
+
+Execute (g:easy_align_last_command should be set):
+  Assert exists('g:easy_align_last_command')
+  unlet g:easy_align_last_command
+
+Do:
+  vip\<Space>\<Enter>**|\<C-C>
+
+Execute (g:easy_align_last_command should not be set if interrupted):
+  Assert !exists('g:easy_align_last_command')
+
 ###########################################################
 
 Given (comma-separated items):
@@ -1214,7 +1274,7 @@ Expect:
   ccc = 3
 
 Do:
-  vip\<Space>\<Enter>=
+  vipr\<Enter>=
 
 Expect:
    a  = 1
@@ -1222,7 +1282,7 @@ Expect:
   ccc = 3
 
 Do:
-  vip\<Space>\<Enter>\<Enter>=
+  vipr\<Enter>\<Enter>=
 
 Expect:
   a   = 1
@@ -1230,7 +1290,7 @@ Expect:
   ccc = 3
 
 Do:
-  vip\<Space>\<Enter>\<Enter>\<Enter>=
+  vipr\<Enter>\<Enter>\<Enter>=
 
 Expect:
    a  = 1