// DecreaseIndent decreases indent of lines that fall within selection by 1 tab (for lines where it's possible).
func (cp *CaretPosition) DecreaseIndent() {
selStart, selEnd := cp.SelectionRange2()
first, last := cp.lineIndexSpan()
newContent := cp.w.Content()[:cp.w.Line(first).Start()]
for lineIndex := first; lineIndex <= last; lineIndex++ {
contentLine := cp.w.Line(lineIndex)
if lineIndex != first {
newContent += "\n"
}
line := cp.w.Content()[contentLine.Start():contentLine.End()]
if strings.HasPrefix(line, "\t") {
line = line[1:] // Trim leading tab.
if lineIndex == first {
selStart.Move(-1)
}
if lineIndex == last {
selEnd.Move(-1)
}
}
newContent += line
}
newContent += cp.w.Content()[cp.w.Line(last).End():]
gist7802150.SetViewGroup(cp.w, newContent)
}
// IncreaseIndent increases indent of all lines that fall within selection by 1 tab.
func (cp *CaretPosition) IncreaseIndent() {
selStart, selEnd := cp.SelectionRange2()
first, last := cp.lineIndexSpan()
newContent := cp.w.Content()[:cp.w.Line(first).Start()]
for lineIndex := first; lineIndex <= last; lineIndex++ {
contentLine := cp.w.Line(lineIndex)
if lineIndex != first {
newContent += "\n"
}
newContent += "\t" + cp.w.Content()[contentLine.Start():contentLine.End()]
}
newContent += cp.w.Content()[cp.w.Line(last).End():]
gist7802150.SetViewGroup(cp.w, newContent)
// Safe to use willMoveH after SetViewGroup, since we know each line will always get a character longer.
selStart.willMoveH(1)
selEnd.willMoveH(1)
}
// Replaces selection with string s and moves caret to end of s.
func (cp *CaretPosition) ReplaceSelectionWith(s string) {
selStart, selEnd := cp.SelectionRange2()
gist7802150.SetViewGroup(cp.w, cp.w.Content()[:selStart.Logical()]+s+cp.w.Content()[selEnd.Logical():])
selStart.willMoveH(int32(len(s)))
selEnd.MoveTo(selStart)
}