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Disable preview scroll if the content fits on the screen

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Close #1540
This commit is contained in:
Junegunn Choi 2019-03-29 18:28:45 +09:00
parent 89e24bf8f2
commit 37585bd5a5
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GPG Key ID: 254BC280FEF9C627
1 changed files with 11 additions and 6 deletions
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17
src/terminal.go
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@ -40,6 +40,7 @@ type previewer struct {
lines int
offset int
enabled bool
more bool
}
type itemLine struct {
@ -410,7 +411,7 @@ func NewTerminal(opts *Options, eventBox *util.EventBox) *Terminal {
selected: make(map[int32]selectedItem),
reqBox: util.NewEventBox(),
preview: opts.Preview,
previewer: previewer{"", 0, 0, previewBox != nil && !opts.Preview.hidden},
previewer: previewer{"", 0, 0, previewBox != nil && !opts.Preview.hidden, false},
previewBox: previewBox,
eventBox: eventBox,
mutex: sync.Mutex{},
@ -1027,18 +1028,17 @@ func (t *Terminal) printPreview() {
reader := bufio.NewReader(strings.NewReader(t.previewer.text))
lineNo := -t.previewer.offset
height := t.pwindow.Height()
t.previewer.more = t.previewer.offset > 0
var ansi *ansiState
for {
for ; ; lineNo++ {
line, err := reader.ReadString('\n')
eof := err == io.EOF
if !eof {
line = line[:len(line)-1]
}
lineNo++
if lineNo > height ||
t.pwindow.Y() == height-1 && t.pwindow.X() > 0 {
if lineNo >= height || t.pwindow.Y() == height-1 && t.pwindow.X() > 0 {
break
} else if lineNo > 0 {
} else if lineNo >= 0 {
var fillRet tui.FillReturn
prefixWidth := 0
_, _, ansi = extractColor(line, ansi, func(str string, ansi *ansiState) bool {
@ -1055,6 +1055,7 @@ func (t *Terminal) printPreview() {
}
return fillRet == tui.FillContinue
})
t.previewer.more = t.previewer.more || t.pwindow.Y() == height-1 && t.pwindow.X() > 0
if fillRet == tui.FillNextLine {
continue
} else if fillRet == tui.FillSuspend {
@ -1068,6 +1069,7 @@ func (t *Terminal) printPreview() {
}
t.pwindow.FinishFill()
if t.previewer.lines > height {
t.previewer.more = true
offset := fmt.Sprintf("%d/%d", t.previewer.offset+1, t.previewer.lines)
pos := t.pwindow.Width() - len(offset)
if t.tui.DoesAutoWrap() {
@ -1651,6 +1653,9 @@ func (t *Terminal) Loop() {
}
}
scrollPreview := func(amount int) {
if !t.previewer.more {
return
}
newOffset := util.Constrain(
t.previewer.offset+amount, 0, t.previewer.lines-1)
if t.previewer.offset != newOffset {