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Support preview scroll offset relative to window height

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Related: https://github.com/junegunn/fzf.vim/issues/1092
This commit is contained in:
Junegunn Choi
2020-08-23 15:57:49 +09:00
parent 1ab4289ad6
commit 1cb19dbf65
4 changed files with 32 additions and 7 deletions
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14
src/terminal.go
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@@ -1374,7 +1374,7 @@ func atopi(s string) int {
return n
}
func (t *Terminal) evaluateScrollOffset(list []*Item) int {
func (t *Terminal) evaluateScrollOffset(list []*Item, height int) int {
offsetExpr := t.replacePlaceholder(t.preview.scroll, false, "", list)
nums := strings.Split(offsetExpr, "-")
switch len(nums) {
@@ -1387,6 +1387,13 @@ func (t *Terminal) evaluateScrollOffset(list []*Item) int {
} else if len(nums) == 1 {
return base - 1
}
if nums[1][0] == '/' {
denom := atopi(nums[1][1:])
if denom == 0 {
return base
}
return base - height/denom
}
return base - atopi(nums[1]) - 1
default:
return 0
@@ -1676,11 +1683,12 @@ func (t *Terminal) Loop() {
// We don't display preview window if no match
if items[0] != nil {
command := t.replacePlaceholder(commandTemplate, false, string(t.Input()), items)
offset := t.evaluateScrollOffset(items)
height := t.pwindow.Height()
offset := t.evaluateScrollOffset(items, height)
cmd := util.ExecCommand(command, true)
if t.pwindow != nil {
env := os.Environ()
lines := fmt.Sprintf("LINES=%d", t.pwindow.Height())
lines := fmt.Sprintf("LINES=%d", height)
columns := fmt.Sprintf("COLUMNS=%d", t.pwindow.Width())
env = append(env, lines)
env = append(env, "FZF_PREVIEW_"+lines)