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Add change-header-lines action to dynamically change --header-lines

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All input lines now enter the chunklist with sequential indices, and
header lines are excluded from matching via Pattern.startIndex and
PassMerger offset. This allows the number of header lines to be changed
at runtime with change-header-lines(N), transform-header-lines, and
bg-transform-header-lines actions.

- Remove EvtHeader event; header items are read directly from chunks
- Add startIndex to Pattern and PassMerger for skipping header items
- Add targetIndex field to Terminal for cursor repositioning across
  header-lines changes

Close #4659
This commit is contained in:
Junegunn Choi
2026-02-23 01:45:47 +09:00
parent 98a3b1fff8
commit b9804f5873
13 changed files with 420 additions and 227 deletions
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2
man/man1/fzf.1
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@@ -1881,6 +1881,7 @@ A key or an event can be bound to one or more of the following actions.
\fBchange\-border\-label(...)\fR (change \fB\-\-border\-label\fR to the given string)
\fBchange\-ghost(...)\fR (change ghost text to the given string)
\fBchange\-header(...)\fR (change header to the given string; doesn't affect \fB\-\-header\-lines\fR)
\fBchange\-header\-lines(N)\fR (change the number of \fB\-\-header\-lines\fR)
\fBchange\-header\-label(...)\fR (change \fB\-\-header\-label\fR to the given string)
\fBchange\-input\-label(...)\fR (change \fB\-\-input\-label\fR to the given string)
\fBchange\-list\-label(...)\fR (change \fB\-\-list\-label\fR to the given string)
@@ -1987,6 +1988,7 @@ A key or an event can be bound to one or more of the following actions.
\fBtransform\-border\-label(...)\fR (transform border label using an external command)
\fBtransform\-ghost(...)\fR (transform ghost text using an external command)
\fBtransform\-header(...)\fR (transform header using an external command)
\fBtransform\-header\-lines(...)\fR (transform the number of \fB\-\-header\-lines\fR using an external command)
\fBtransform\-header\-label(...)\fR (transform header label using an external command)
\fBtransform\-input\-label(...)\fR (transform input label using an external command)
\fBtransform\-list\-label(...)\fR (transform list label using an external command)