// DefaultTextBoxLine overrides
func (t *CodeEditorLine) Paint(c gxui.Canvas) {
font := t.ce.font
rect := t.Size().Rect().OffsetX(t.caretWidth)
controller := t.ce.controller
runes := controller.LineRunes(t.lineIndex)
start := controller.LineStart(t.lineIndex)
end := controller.LineEnd(t.lineIndex)
if start != end {
lineSpan := interval.CreateIntData(start, end, nil)
lineHeight := t.Size().H
glyphWidth := font.GlyphMaxSize().W
offsets := font.Layout(&gxui.TextBlock{
Runes: runes,
AlignRect: rect,
H: gxui.AlignLeft,
V: gxui.AlignMiddle,
})
info := CodeEditorLinePaintInfo{
LineSpan: lineSpan,
Runes: runes, // TODO gxui.TextBlock?
GlyphOffsets: offsets,
GlyphWidth: glyphWidth,
LineHeight: lineHeight,
Font: font,
}
// Background
t.outer.PaintBackgroundSpans(c, info)
// Selections
if t.textbox.HasFocus() {
t.outer.PaintSelections(c)
}
// Glyphs
t.outer.PaintGlyphs(c, info)
// Borders
t.outer.PaintBorders(c, info)
}
// Carets
if t.textbox.HasFocus() {
t.outer.PaintCarets(c)
}
}
func (l *CodeSyntaxLayer) UpdateSpans(runeCount int, edits []TextBoxEdit) {
min := 0
max := runeCount
for _, e := range edits {
if l == nil {
continue
}
for j, s := range l.spans {
at := e.At
start, end := s.Range()
if start >= at {
start = math.Clamp(start+e.Delta, min, max)
}
if end > at {
end = math.Clamp(end+e.Delta, min, max)
}
if end < start {
end = start
}
l.spans[j] = interval.CreateIntData(start, end, s.Data())
}
}
}
func (l *CodeSyntaxLayer) AddData(start, count int, data interface{}) {
span := interval.CreateIntData(start, start+count, data)
interval.Replace(&l.spans, span)
}