46 lines
975 B
Go
46 lines
975 B
Go
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package render
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import (
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"image/color"
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"github.com/hajimehoshi/ebiten/v2/text"
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imagefont "golang.org/x/image/font"
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)
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var ligatures = map[string]rune{
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":=": '≔',
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"===": '≡',
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"!=": '≠',
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"!==": '≢',
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"<=": '≤',
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">=": '≥',
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"=>": '⇒',
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"->": '→',
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"<-": '←',
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"<>": '≷',
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}
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func (r *Render) handleLigatures(sx uint16, sy uint16, face imagefont.Face, colour color.Color) (length int) {
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var candidate string
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for x := sx; x <= sx+2; x++ {
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cell := r.buffer.GetCell(x, sy)
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if cell == nil || cell.Rune().Rune == 0 {
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break
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}
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candidate += string(cell.Rune().Rune)
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}
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for len(candidate) > 1 {
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if ru, ok := ligatures[candidate]; ok {
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// draw ligature
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ligX := (int(sx) * r.font.CellSize.X) + (((len(candidate) - 1) * r.font.CellSize.X) / 2)
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text.Draw(r.frame, string(ru), face, ligX, (int(sy)*r.font.CellSize.Y)+r.font.DotDepth, colour)
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return len(candidate)
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}
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candidate = candidate[:len(candidate)-1]
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}
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return 0
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}
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