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Add support for preview window header

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Fix #2373

  # Display top 3 lines as the fixed header
  fzf --preview 'bat --style=header,grid --color=always {}' --preview-window '~3'
This commit is contained in:
Junegunn Choi
2021-03-12 19:51:28 +09:00
parent 7310370a31
commit 4c4c6e626e
5 changed files with 87 additions and 29 deletions
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30
src/options.go
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@@ -84,7 +84,7 @@ const usage = `usage: fzf [options]
[up|down|left|right][:SIZE[%]]
[:[no]wrap][:[no]cycle][:[no]follow][:[no]hidden]
[:rounded|sharp|noborder]
[:+SCROLL[-OFFSET]]
[:+SCROLL[-OFFSET]][:~HEADER_LINES]
[:default]
Scripting
@@ -161,15 +161,16 @@ const (
)
type previewOpts struct {
command string
position windowPosition
size sizeSpec
scroll string
hidden bool
wrap bool
cycle bool
follow bool
border tui.BorderShape
command string
position windowPosition
size sizeSpec
scroll string
hidden bool
wrap bool
cycle bool
follow bool
border tui.BorderShape
headerLines int
}
// Options stores the values of command-line options
@@ -231,7 +232,7 @@ type Options struct {
}
func defaultPreviewOpts(command string) previewOpts {
return previewOpts{command, posRight, sizeSpec{50, true}, "", false, false, false, false, tui.BorderRounded}
return previewOpts{command, posRight, sizeSpec{50, true}, "", false, false, false, false, tui.BorderRounded, 0}
}
func defaultOptions() *Options {
@@ -1078,6 +1079,7 @@ func parsePreviewWindow(opts *previewOpts, input string) {
tokens := strings.Split(input, ":")
sizeRegex := regexp.MustCompile("^[0-9]+%?$")
offsetRegex := regexp.MustCompile("^\\+([0-9]+|{-?[0-9]+})(-[0-9]+|-/[1-9][0-9]*)?$")
headerRegex := regexp.MustCompile("^~(0|[1-9][0-9]*)$")
for _, token := range tokens {
switch token {
case "":
@@ -1114,7 +1116,9 @@ func parsePreviewWindow(opts *previewOpts, input string) {
case "nofollow":
opts.follow = false
default:
if sizeRegex.MatchString(token) {
if headerRegex.MatchString(token) {
opts.headerLines = atoi(token[1:])
} else if sizeRegex.MatchString(token) {
opts.size = parseSize(token, 99, "window size")
} else if offsetRegex.MatchString(token) {
opts.scroll = token[1:]
@@ -1364,7 +1368,7 @@ func parseOptions(opts *Options, allArgs []string) {
opts.Preview.command = ""
case "--preview-window":
parsePreviewWindow(&opts.Preview,
nextString(allArgs, &i, "preview window layout required: [up|down|left|right][:SIZE[%]][:rounded|sharp|noborder][:wrap][:cycle][:hidden][:+SCROLL[-OFFSET]][:default]"))
nextString(allArgs, &i, "preview window layout required: [up|down|left|right][:SIZE[%]][:rounded|sharp|noborder][:wrap][:cycle][:hidden][:+SCROLL[-OFFSET]][:~HEADER_LINES][:default]"))
case "--height":
opts.Height = parseHeight(nextString(allArgs, &i, "height required: HEIGHT[%]"))
case "--min-height":