play around with file preveiw in opengraph
parent
723598b803
commit
b6fafb67d5
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package image
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import (
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"bytes"
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"encoding/base64"
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"image/color"
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"strings"
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"github.com/jbuchbinder/gg"
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"github.com/jiro4989/textimg/v3/token"
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)
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func Draw(tokens token.Tokens) (string, error) {
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foreground := color.RGBA{205, 214, 244, 255}
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background := color.RGBA{30, 30, 46, 255}
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dc := gg.NewContext(1200, 630)
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fgCol := foreground
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bgCol := background
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dc.SetColor(bgCol)
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if err := dc.LoadFontFace("fonts/FiraCode-Regular.ttf", 14); err != nil {
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return "", err
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}
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dc.Clear()
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curX, curY := 0.0, 0.0
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for _, t := range tokens {
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switch t.Kind {
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case token.KindColor:
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switch t.ColorType {
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case token.ColorTypeReset:
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fgCol = foreground
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bgCol = background
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case token.ColorTypeResetForeground:
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fgCol = foreground
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case token.ColorTypeResetBackground:
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bgCol = background
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case token.ColorTypeReverse:
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fgCol, bgCol = bgCol, fgCol
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case token.ColorTypeForeground:
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fgCol = color.RGBA(t.Color)
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case token.ColorTypeBackground:
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bgCol = color.RGBA(t.Color)
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}
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case token.KindText:
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w, h := dc.MeasureMultilineString(t.Text, 1.0)
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dc.SetColor(bgCol)
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dc.DrawRectangle(curX, curY, w, h)
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dc.SetColor(fgCol)
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dc.DrawStringAnchored(strings.ReplaceAll(strings.ReplaceAll(t.Text, "\t", " "), "\n", ""), curX, curY, 0.0, 1.0)
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curX += w
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if strings.Contains(t.Text, "\n") {
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curY += h
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curX = 0
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}
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}
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}
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buffer := new(bytes.Buffer)
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dc.EncodePNG(buffer)
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return "data:image/png;base64," + base64.StdEncoding.EncodeToString(buffer.Bytes()), nil
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}
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File diff suppressed because it is too large
Load Diff
@ -0,0 +1,74 @@
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package parser
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import (
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"strconv"
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"github.com/jiro4989/textimg/v3/color"
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"github.com/jiro4989/textimg/v3/token"
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)
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type ParserFunc struct {
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// pegが生成するTokensと名前が衝突するので別名にする
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Tk token.Tokens
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}
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func Parse(s string) (token.Tokens, error) {
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p := &Parser{Buffer: s}
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if err := p.Init(); err != nil {
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return nil, err
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}
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if err := p.Parse(); err != nil {
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return nil, err
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}
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p.Execute()
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return p.Tk, nil
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}
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func (p *ParserFunc) pushResetColor() {
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p.Tk = append(p.Tk, token.NewResetColor())
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}
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func (p *ParserFunc) pushResetForegroundColor() {
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p.Tk = append(p.Tk, token.NewResetForegroundColor())
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}
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func (p *ParserFunc) pushResetBackgroundColor() {
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p.Tk = append(p.Tk, token.NewResetBackgroundColor())
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}
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func (p *ParserFunc) pushReverseColor() {
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p.Tk = append(p.Tk, token.NewReverseColor())
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}
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func (p *ParserFunc) pushText(text string) {
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p.Tk = append(p.Tk, token.NewText(text))
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}
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func (p *ParserFunc) pushStandardColorWithCategory(text string) {
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p.Tk = append(p.Tk, token.NewStandardColorWithCategory(text))
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}
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func (p *ParserFunc) pushExtendedColor(text string) {
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p.Tk = append(p.Tk, token.NewExtendedColor(text))
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}
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func (p *ParserFunc) setExtendedColor256(text string) {
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n, _ := strconv.ParseUint(text, 10, 8)
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p.Tk[len(p.Tk)-1].Color = color.Map256[int(n)]
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}
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func (p *ParserFunc) setExtendedColorR(text string) {
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n, _ := strconv.ParseUint(text, 10, 8)
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p.Tk[len(p.Tk)-1].Color.R = uint8(n)
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}
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func (p *ParserFunc) setExtendedColorG(text string) {
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n, _ := strconv.ParseUint(text, 10, 8)
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p.Tk[len(p.Tk)-1].Color.G = uint8(n)
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}
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func (p *ParserFunc) setExtendedColorB(text string) {
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n, _ := strconv.ParseUint(text, 10, 8)
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p.Tk[len(p.Tk)-1].Color.B = uint8(n)
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}
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