func (l *CodeEditorLine) offsets(font gxui.Font) []math.Point {
rect := l.Size().Rect().OffsetX(l.caretWidth)
runes := l.ce.Controller().LineRunes(l.lineIndex)
offsets := font.Layout(&gxui.TextBlock{
Runes: runes,
AlignRect: rect,
H: gxui.AlignLeft,
V: gxui.AlignMiddle,
})
l.applyTabWidth(runes, offsets, font)
for i, offset := range offsets {
offsets[i] = offset.AddX(-l.offset)
}
return offsets
}
// tabDelta returns the difference between the current font's measurement
// of a tab character and the actual tab size based on spaces times the
// code editor's tab width.
func (l *CodeEditorLine) tabDelta(font gxui.Font) int {
tabWidth := font.Measure(&gxui.TextBlock{Runes: []rune{'\t'}}).W
spaceWidth := font.Measure(&gxui.TextBlock{Runes: []rune{' '}}).W
return spaceWidth*l.ce.TabWidth() - tabWidth
}