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https://github.com/xiaoqidun/ofdgo.git
synced 2026-10-29 16:25:49 +08:00
xiaoqidun committed
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64997b6c39
commit
896d624c3e
4 files changed
+1231
-29
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@@ -305,6 +305,9 @@ func RunWASM() {
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registerCallback("ofdgoInsertText", insertText)
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registerCallback("ofdgoUpdateText", updateText)
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registerCallback("ofdgoPreviewText", previewText)
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registerCallback("ofdgoTextSelection", textSelection)
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registerCallback("ofdgoPreviewTextSelection", previewTextSelection)
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registerCallback("ofdgoUpdateTextSelection", updateTextSelection)
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registerCallback("ofdgoStyleText", styleText)
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registerCallback("ofdgoGetRichText", getRichText)
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registerCallback("ofdgoSaveRichText", saveRichText)
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@@ -3198,6 +3201,303 @@ func previewText(args []js.Value) (any, error) {
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return map[string]any{"runs": runs, "glyphs": glyphs, "scale": scale, "vscale": text.VScale, "rotation": text.CharDirection, "weight": text.Weight, "italic": text.Italic}, nil
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}
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// readTextSelection 将画布路径转换为同一容器的库层文字选区
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// 入参: ids 图元路径列表
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// 返回: ofdgo.TextSelection 文字选区, error 路径错误
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func readTextSelection(ids []string) (ofdgo.TextSelection, error) {
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selection := ofdgo.TextSelection{IDs: ids}
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if currentEditor == nil {
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return selection, fmt.Errorf("no document is being edited")
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}
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if len(ids) == 0 {
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return selection, fmt.Errorf("text selection is empty")
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}
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if index := strings.LastIndex(ids[0], "/"); index >= 0 {
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key := ids[0][:index]
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path, err := compositePath(key)
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if err != nil {
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return selection, err
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}
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indexes, err := compositeIndexes(key, ids)
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return ofdgo.TextSelection{Root: &path, Indexes: indexes}, err
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}
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for _, id := range ids {
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if strings.Contains(id, "/") {
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return selection, fmt.Errorf("text selection crosses containers")
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}
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}
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return selection, nil
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}
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// textSelection 分析联合文字并加载预览所需字体，不改变文档资源
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// 入参: args 页码和图元路径列表
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// 返回: any 文字选区、定位预览和字体, error 分析错误
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func textSelection(args []js.Value) (any, error) {
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selection, err := readTextSelection(stringsFromJS(args[1]))
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if err != nil {
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return nil, err
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}
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analysis, err := currentEditor.AnalyzeTextSelection(args[0].Int(), selection)
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if err != nil {
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return nil, err
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}
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source, err := textSelectionSource(analysis.Parts, analysis.Bounds, analysis.Text, true)
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if err != nil {
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return nil, err
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}
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first := analysis.Parts[0].TextObject
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_, origin := analysis.Parts[0].Matrix.Transform(0, 0)
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_, unit := analysis.Parts[0].Matrix.Transform(0, 1)
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item := editorBox(analysis.Bounds)
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item["text"], item["font"], item["size"] = analysis.Text, first.Font, first.Size*(unit-origin)
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item["color"] = richTextColorHex(analysis.Parts[0].Color)
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item["alpha"] = 255
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if first.Alpha != nil {
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item["alpha"] = *first.Alpha
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}
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item["capabilities"] = map[string]any{"textContent": true, "rewriteText": analysis.Replace, "replaceFont": true, "paint": true, "reflow": analysis.Reflow, "layoutKnown": false}
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item["textFrame"] = map[string]any{"width": analysis.Bounds.W, "height": analysis.Bounds.H, "matrix": editorMatrix(ofdgo.TranslationMatrix(analysis.Bounds.X, analysis.Bounds.Y))}
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available, err := currentSession.Reader.Fonts()
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if err != nil {
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return nil, err
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}
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for _, font := range available {
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if font.ID == first.Font {
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item["fontName"] = font.FontName
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break
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}
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}
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data, err := json.Marshal(map[string]any{"item": item, "source": source})
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if err != nil {
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return nil, err
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}
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result := js.Global().Get("JSON").Call("parse", string(data))
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fonts := js.Global().Get("Array").New()
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seen := make(map[string]bool)
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for _, part := range analysis.Parts {
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id := part.TextObject.Font
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if seen[id] {
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continue
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}
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seen[id] = true
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data, err := currentEditor.FontData(id)
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if err != nil {
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return nil, err
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}
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_, data, _, _, err = ofdgo.FixFontDataAggressive(data, true, false)
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if err != nil {
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return nil, err
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}
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font := js.Global().Get("Object").New()
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font.Set("id", id)
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font.Set("bytes", bytesToJS(data))
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fonts.Call("push", font)
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}
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result.Set("fonts", fonts)
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return successResult(result), nil
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}
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// textSelectionSource 将库层逐字定位转换为选区局部坐标及分段字体样式
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// 入参: parts 预览文字图元, box 原始选区边界, value 完整原文, mapped 是否使用原字形映射
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// 返回: map[string]any 定位预览, error 字形映射错误
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func textSelectionSource(parts []ofdgo.TextSelectionPart, box ofdgo.Box, value string, mapped bool) (map[string]any, error) {
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runs := make([]any, 0, len(parts))
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glyphs := make(map[int]string)
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offset := 0
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logical, cursor := []rune(value), 0
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for _, part := range parts {
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if part.Deleted {
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continue
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}
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text := part.TextObject
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originX, originY := part.Matrix.Transform(0, 0)
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xAxis, _ := part.Matrix.Transform(1, 0)
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_, yAxis := part.Matrix.Transform(0, 1)
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sx, sy := xAxis-originX, yAxis-originY
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scale := text.HScale
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if scale == 0 {
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scale = 1
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}
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for _, transform := range text.CGTransform {
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if !mapped {
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break
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}
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if transform.CodeCount != transform.GlyphCount {
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return nil, fmt.Errorf("text selection contains ambiguous glyph mapping")
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}
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for i, value := range strings.Fields(transform.Glyphs) {
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glyph, err := strconv.ParseUint(value, 10, 16)
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if err != nil {
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return nil, err
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}
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glyphs[offset+transform.CodePosition+i] = string(rune(0xF0000 + glyph))
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}
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}
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alpha := 255
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if text.Alpha != nil {
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alpha = int(*text.Alpha)
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}
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chars := []rune(strings.ReplaceAll(text.Text(), "\n", ""))
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if len(chars) != len(part.Points) {
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return nil, fmt.Errorf("text selection positions do not match characters")
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}
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for i, char := range chars {
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x, y := part.Matrix.Transform(part.Points[i].X, part.Points[i].Y)
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line := false
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for cursor < len(logical) && logical[cursor] == '\n' {
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if line || len(runs) == 0 {
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runs = append(runs, map[string]any{"text": "", "x": x - box.X, "y": y - box.Y - text.Size*sy,
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"positions": [][2]float64{}, "line": line, "font": text.Font, "size": text.Size * sy})
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}
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line = true
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cursor++
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}
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if cursor >= len(logical) || logical[cursor] != char {
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return nil, fmt.Errorf("text selection preview does not match content")
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}
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cursor++
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runs = append(runs, map[string]any{"text": string(char), "x": x - box.X, "y": y - box.Y,
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"positions": [][2]float64{{x - box.X, y - box.Y}}, "line": line, "font": text.Font,
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"size": text.Size * sy, "scale": scale * sx / sy, "vscale": 1, "rotation": 0,
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"weight": text.Weight, "italic": text.Italic, "alpha": alpha, "color": richTextColorHex(part.Color)})
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}
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offset += len(chars)
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}
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for cursor < len(logical) && logical[cursor] == '\n' && len(runs) > 0 {
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last := runs[len(runs)-1].(map[string]any)
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runs = append(runs, map[string]any{"text": "", "x": float64(0), "y": last["y"].(float64) + last["size"].(float64),
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"positions": [][2]float64{}, "line": true, "font": last["font"], "size": last["size"]})
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cursor++
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}
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if cursor != len(logical) {
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return nil, fmt.Errorf("text selection preview is incomplete")
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}
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return map[string]any{"runs": runs, "glyphs": glyphs}, nil
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}
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// readTextSelectionEdit 将完整草稿转为码点范围修改或显式富文本重排
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// 入参: args 编辑参数, analysis 原始选区
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// 返回: ofdgo.TextSelectionEdit 修改内容, error 参数错误
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func readTextSelectionEdit(args []js.Value, analysis ofdgo.TextSelectionAnalysis) (ofdgo.TextSelectionEdit, error) {
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old, next := []rune(analysis.Text), []rune(args[2].String())
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start, end, tail := 0, len(old), len(next)
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for start < end && start < tail && old[start] == next[start] {
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start++
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}
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for end > start && tail > start && old[end-1] == next[tail-1] {
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end--
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tail--
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}
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edit := ofdgo.TextSelectionEdit{Start: start, End: end, Text: string(next[start:tail])}
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if !args[3].IsNull() {
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var err error
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edit.FontData, err = bytesFromJS(args[3])
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if err != nil {
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return edit, err
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}
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}
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if !args[4].IsNull() {
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edit.Size = args[4].Float()
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}
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if !args[5].IsNull() {
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value := args[5].String()
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if len(value) != 7 || value[0] != '#' {
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return edit, fmt.Errorf("invalid RGB color %q", value)
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}
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rgb, err := hex.DecodeString(value[1:])
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if err != nil {
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return edit, err
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}
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edit.Color = fmt.Sprintf("%d %d %d", rgb[0], rgb[1], rgb[2])
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}
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if args[6].Bool() && len(next) > 0 {
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value := analysis.RichText
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var replacement []ofdgo.RichTextRun
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if tail > start {
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part, err := value.Slice(start, start)
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if tail-start == end-start {
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part, err = value.Slice(start, end)
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}
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if err != nil {
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return edit, err
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}
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if tail-start == end-start {
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offset := start
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for _, run := range part.Runs {
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count := len([]rune(run.Text))
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replacement = append(replacement, ofdgo.RichTextRun{Text: string(next[offset : offset+count]), Format: run.Format})
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offset += count
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}
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} else {
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replacement = []ofdgo.RichTextRun{{Text: edit.Text, Format: part.Runs[0].Format}}
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}
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}
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if err := value.Replace(start, end, replacement); err != nil {
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return edit, err
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}
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value.Layout.AutoBidi, value.Layout.Wrap = true, true
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edit.Reflow = &value
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}
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return edit, nil
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}
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// previewTextSelection 预览联合修改，不改变文档资源及撤销记录
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// 入参: args 页码、图元路径、内容、字体数据、字号、颜色和重排标记
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// 返回: any 定位预览, error 编辑错误
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func previewTextSelection(args []js.Value) (any, error) {
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selection, err := readTextSelection(stringsFromJS(args[1]))
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if err != nil {
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return nil, err
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}
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analysis, err := currentEditor.AnalyzeTextSelection(args[0].Int(), selection)
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if err != nil {
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return nil, err
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}
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edit, err := readTextSelectionEdit(args, analysis)
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if err != nil {
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return nil, err
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}
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preview, err := currentEditor.PreviewTextSelection(args[0].Int(), analysis.Selection, edit)
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if err != nil {
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return nil, err
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}
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return textSelectionSource(preview.Parts, analysis.Bounds, preview.Text, len(edit.FontData) == 0)
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}
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// updateTextSelection 原子提交联合修改并恢复删除或重排后的选区
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// 入参: args 页码、图元路径、内容、字体数据、字号、颜色和重排标记
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// 返回: any 文档及选区信息, error 编辑错误
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func updateTextSelection(args []js.Value) (any, error) {
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ids := stringsFromJS(args[1])
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selection, err := readTextSelection(ids)
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if err != nil {
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return nil, err
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}
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page := args[0].Int()
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analysis, err := currentEditor.AnalyzeTextSelection(page, selection)
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if err != nil {
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return nil, err
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}
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edit, err := readTextSelectionEdit(args, analysis)
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if err != nil {
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return nil, err
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}
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preview, err := currentEditor.PreviewTextSelection(page, analysis.Selection, edit)
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if err != nil {
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return nil, err
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}
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result, err := changeObjects(func() error { return currentEditor.UpdateTextSelection(page, analysis.Selection, edit) })
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if err != nil {
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return nil, err
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}
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selected := append([]string{}, preview.Selection.IDs...)
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for _, index := range preview.Selection.Indexes {
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key := ids[0][:strings.LastIndex(ids[0], "/")]
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selected = append(selected, fmt.Sprintf("%s/%d", key, index))
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}
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return editorSelectionInfo{editorInfo: result.(editorInfo), SelectedIDs: selected}, nil
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}
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// previewPositionedText 预览保留定位的文字替换，不修改编辑器或撤销记录
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// 入参: args 页面、对象路径和内容
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// 返回: any SVG预览, error 错误信息
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