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Inject $LINES and $COLUMNS when running preview command

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Close #1168
This commit is contained in:
Junegunn Choi 2017-12-01 03:27:58 +09:00
parent b3b101a89c
commit f6b1962056
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GPG Key ID: 254BC280FEF9C627
3 changed files with 14 additions and 5 deletions
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7
man/man1/fzf.1
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@ -272,14 +272,17 @@ string, specify field index expressions between the braces (See \fBFIELD INDEX
EXPRESSION\fR for the details).
.RS
e.g. \fBfzf --preview="head -$LINES {}"\fR
e.g. \fBfzf --preview='head -$LINES {}'\fR
\fBls -l | fzf --preview="echo user={3} when={-4..-2}; cat {-1}" --header-lines=1\fR
fzf overrides \fB$LINES\fR and \fB$COLUMNS\fR so that they represent the exact
size of the preview window.
A placeholder expression starting with \fB+\fR flag will be replaced to the
space-separated list of the selected lines (or the current line if no selection
was made) individually quoted.
e.g. \fBfzf --multi --preview="head -10 {+}"\fR
e.g. \fBfzf --multi --preview='head -10 {+}'\fR
\fBgit log --oneline | fzf --multi --preview 'git show {+1}'\fR
Also, \fB{q}\fR is replaced to the current query string.

6
src/terminal.go
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@ -1368,6 +1368,12 @@ func (t *Terminal) Loop() {
command := replacePlaceholder(t.preview.command,
t.ansi, t.delimiter, false, string(t.input), request)
cmd := util.ExecCommand(command)
if t.pwindow != nil {
env := os.Environ()
env = append(env, fmt.Sprintf("LINES=%d", t.pwindow.Height()))
env = append(env, fmt.Sprintf("COLUMNS=%d", t.pwindow.Width()))
cmd.Env = env
}
out, _ := cmd.CombinedOutput()
t.reqBox.Set(reqPreviewDisplay, string(out))
} else {

6
test/test_go.rb
View File

@ -1319,12 +1319,12 @@ class TestGoFZF < TestBase
end
def test_preview_hidden
tmux.send_keys %(seq 1000 | #{FZF} --preview 'echo {{}-{}}' --preview-window down:1:hidden --bind ?:toggle-preview), :Enter
tmux.send_keys %(seq 1000 | #{FZF} --preview 'echo {{}-{}-\\$LINES-\\$COLUMNS}' --preview-window down:1:hidden --bind ?:toggle-preview), :Enter
tmux.until { |lines| lines[-1] == '>' }
tmux.send_keys '?'
tmux.until { |lines| lines[-2].include?(' {1-1}') }
tmux.until { |lines| lines[-2].match?(/ {1-1-1-[0-9]+}/) }
tmux.send_keys '555'
tmux.until { |lines| lines[-2].include?(' {555-555}') }
tmux.until { |lines| lines[-2].match?(/ {555-555-1-[0-9]+}/) }
tmux.send_keys '?'
tmux.until { |lines| lines[-1] == '> 555' }
end