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Implement word wrapping in the preview window

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Example:
  fzf --preview 'bat --style=plain --color=always {}' \
      --preview-window wrap-word \
      --bind space:toggle-preview-wrap-word

Close https://github.com/junegunn/fzf/discussions/3383
This commit is contained in:
Junegunn Choi
2026-02-18 13:21:33 +09:00
parent b56d614ba2
commit b6411beaa1
12 changed files with 483 additions and 222 deletions
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20
src/options.go
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@@ -157,7 +157,7 @@ Usage: fzf [options]
--preview=COMMAND Command to preview highlighted line ({})
--preview-window=OPT Preview window layout (default: right:50%)
[up|down|left|right][,SIZE[%]]
[,[no]wrap][,[no]cycle][,[no]follow][,[no]info]
[,[no]wrap[-word]][,[no]cycle][,[no]follow][,[no]info]
[,[no]hidden][,border-STYLE]
[,+SCROLL[OFFSETS][/DENOM]][,~HEADER_LINES]
[,default][,<SIZE_THRESHOLD(ALTERNATIVE_LAYOUT)]
@@ -367,6 +367,7 @@ type previewOpts struct {
scroll string
hidden bool
wrap bool
wrapWord bool
cycle bool
follow bool
info bool
@@ -543,7 +544,7 @@ func (o *previewOpts) compare(active *previewOpts, b *previewOpts) previewOptsCo
return previewOptsDifferentLayout
}
if a.wrap == b.wrap && a.headerLines == b.headerLines && a.info == b.info && a.scroll == b.scroll {
if a.wrap == b.wrap && a.wrapWord == b.wrapWord && a.headerLines == b.headerLines && a.info == b.info && a.scroll == b.scroll {
return previewOptsSame
}
@@ -691,7 +692,13 @@ func filterNonEmpty(input []string) []string {
}
func defaultPreviewOpts(command string) previewOpts {
return previewOpts{command, posRight, sizeSpec{50, true}, "", false, false, false, false, true, defaultBorderShape, 0, 0, nil}
return previewOpts{
command: command,
position: posRight,
size: sizeSpec{50, true},
info: true,
border: defaultBorderShape,
}
}
func defaultOptions() *Options {
@@ -1863,6 +1870,8 @@ func parseActionList(masked string, original string, prevActions []*action, putA
appendAction(actTogglePreview)
case "toggle-preview-wrap":
appendAction(actTogglePreviewWrap)
case "toggle-preview-wrap-word":
appendAction(actTogglePreviewWrapWord)
case "toggle-sort":
appendAction(actToggleSort)
case "offset-up":
@@ -2274,8 +2283,13 @@ func parsePreviewWindowImpl(opts *previewOpts, input string) error {
opts.hidden = false
case "wrap":
opts.wrap = true
opts.wrapWord = false
case "wrap-word":
opts.wrap = true
opts.wrapWord = true
case "nowrap":
opts.wrap = false
opts.wrapWord = false
case "cycle":
opts.cycle = true
case "nocycle":