Method renderRegionBoxStyle

texteditor/render.go:298–338

renderRegionBoxStyle renders a region in given style and background

(reg text.Region, sty *styles.Style, bg image.Image, fullWidth bool)

// renderRegionBoxStyle renders a region in given style and background
func (ed *Editor) renderRegionBoxStyle(reg text.Region, sty *styles.Style, bg image.Image, fullWidth bool) {
	st := reg.Start
	end := reg.End
	spos := ed.charStartPosVisible(st)
	epos := ed.charStartPosVisible(end)
	epos.Y += ed.lineHeight
	bb := ed.renderBBox()
	stx := math32.Ceil(float32(bb.Min.X) + ed.LineNumberOffset)
	if int(math32.Ceil(epos.Y)) < bb.Min.Y || int(math32.Floor(spos.Y)) > bb.Max.Y {
		return
	}
	ex := float32(bb.Max.X)
	if fullWidth {
		epos.X = ex
	}

	pc := &ed.Scene.PaintContext
	stsi, _, _ := ed.wrappedLineNumber(st)
	edsi, _, _ := ed.wrappedLineNumber(end)
	if st.Ln == end.Ln && stsi == edsi {
		pc.FillBox(spos, epos.Sub(spos), bg) // same line, done
		return
	}
	// on diff lines: fill to end of stln
	seb := spos
	seb.Y += ed.lineHeight
	seb.X = ex
	pc.FillBox(spos, seb.Sub(spos), bg)
	sfb := seb
	sfb.X = stx
	if sfb.Y < epos.Y { // has some full box
		efb := epos
		efb.Y -= ed.lineHeight
		efb.X = ex
		pc.FillBox(sfb, efb.Sub(sfb), bg)
	}
	sed := epos
	sed.Y -= ed.lineHeight
	sed.X = stx
	pc.FillBox(sed, epos.Sub(sed), bg)
}

// renderRegionToEnd renders a region in given style and background, to end of line from start
func (ed *Editor) renderRegionToEnd(st lexer.Pos, sty *styles.Style, bg image.Image) {