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Cut, Copy, and Paste #6

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Cut, Copy, and Paste #6

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1 change: 1 addition & 0 deletions AUTHORS
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Open in desktop
Original file line number Diff line number Diff line change
@@ -1 +1,2 @@
John Asmuth <[email protected]>
Michael Schneider <[email protected]>
92 changes: 60 additions & 32 deletions widgets/entry.go
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Original file line number Diff line number Diff line change
Expand Up @@ -186,6 +186,41 @@ func (e *Entry) cursorForCoord(p geom.Coord) (cursor int) {
return
}

func (e *Entry) getStartEndPositions() (start, end int) {
start, end = e.cursor-1, e.cursor
if e.selecting {
start = e.cursor
end = e.selectCursor
if end < start {
start, end = end, start
}
}
return start, end
}

func (e *Entry) insertRunes(runes []rune) {
start, end := e.cursor, e.cursor
if e.selecting {
end = e.selectCursor
if end < start {
start, end = end, start
}
}
head := e.text[:start]
tail := e.text[end:]
e.text = make([]rune, len(head)+len(tail)+1)[:0]
e.text = append(e.text, head...)

newslice := make([]rune, len(e.text)+len(runes))
copy(newslice, e.text)
copy(newslice[len(e.text):], runes)
e.text = newslice

e.text = append(e.text, tail...)
e.cursor = start + len(runes)
e.selecting = false
}

func (e *Entry) handleEvents() {
for {
select {
Expand Down Expand Up @@ -214,23 +249,27 @@ func (e *Entry) handleEvents() {
e.Invalidate()
}
case uik.KeyTypedEvent:

// uik.Report("key", ev.Code, ev.Letter)
if ev.Glyph != "" {
start, end := e.cursor, e.cursor
if e.selecting {
end = e.selectCursor
if end < start {
start, end = end, start
}
if ev.Chord == wde.CutChord {
if len(e.text) == 0 || !e.selecting {
break
}
start, end := e.getStartEndPositions()
wde.SetClipboardText(string(e.text[start:end]))
copy(e.text[start:], e.text[end:])
e.text = e.text[:len(e.text)-(end-start)]
e.cursor = start
e.selecting = false
} else if ev.Chord == wde.PasteChord {
e.insertRunes([]rune(wde.GetClipboardText()))
} else if ev.Chord == wde.CopyChord {
if len(e.text) == 0 || !e.selecting {
break
}
head := e.text[:start]
tail := e.text[end:]
e.text = make([]rune, len(head)+len(tail)+1)[:0]
e.text = append(e.text, head...)
e.text = append(e.text, []rune(ev.Glyph)[0])
e.text = append(e.text, tail...)
e.cursor = start + 1
start, end := e.getStartEndPositions()
wde.SetClipboardText(string(e.text[start:end]))
} else if ev.Glyph != "" {
e.insertRunes([]rune(ev.Glyph))
} else {
switch ev.Key {
case wde.KeyBackspace:
Expand All @@ -240,46 +279,35 @@ func (e *Entry) handleEvents() {
if !e.selecting && e.cursor == 0 {
break
}
start, end := e.cursor-1, e.cursor
if e.selecting {
start = e.cursor
end = e.selectCursor
if end < start {
start, end = end, start
}
}
start, end := e.getStartEndPositions()
copy(e.text[start:], e.text[end:])
e.text = e.text[:len(e.text)-(end-start)]
e.cursor = start
e.selecting = false
case wde.KeyDelete:
if len(e.text) == 0 {
break
}
if !e.selecting && e.cursor == len(e.text) {
break
}
start, end := e.cursor, e.cursor+1
if e.selecting {
start = e.cursor
end = e.selectCursor
if end < start {
start, end = end, start
}
}
start, end := e.getStartEndPositions()
copy(e.text[start:], e.text[end:])
e.text = e.text[:len(e.text)-(end-start)]
e.cursor = start
e.selecting = false
case wde.KeyLeftArrow:
if e.cursor > 0 {
e.cursor--
}
e.selecting = false
case wde.KeyRightArrow:
if e.cursor < len(e.text) {
e.cursor++
}
e.selecting = false
}
}
e.selecting = false
e.render()
e.Invalidate()
case uik.KeyFocusEvent:
Expand Down