feat(创建编辑): 支持文字字号与颜色调整，完善编辑交互

assets/webui/index.html

@@ -69,6 +69,11 @@
 				</select>
 				<span>对象</span>
 			</div>
+			<div class="editor-group">
+				<div class="form-unit text-size"><input id="textSize" type="number" min="1" step="any" required aria-label="字号" disabled><span>pt</span></div>
+				<input id="textColor" class="color-input" type="color" value="#000000" aria-label="文字颜色" title="文字颜色" disabled>
+				<span>文字</span>
+			</div>
 			<div class="editor-group">
 				<button id="insertTextButton" class="button" type="button" aria-label="添加文字">文字</button>
 				<button id="insertImageButton" class="button" type="button" aria-label="添加图片">图片</button>
@@ -152,9 +157,15 @@
 						<button id="insertFontAdd" class="icon-button" type="button" title="添加字体" aria-label="添加字体">+</button>
 					</div>
 				</div>
+				<div class="form-pair">
 					<div id="insertSizeRow" class="form-row">
 						<label for="insertSize">字号</label>
-					<div class="form-unit"><input id="insertSize" type="number" value="12" min="1" step="any" required><span>pt</span></div>
+						<div class="form-unit text-size"><input id="insertSize" type="number" value="12" min="1" step="any" required><span>pt</span></div>
+					</div>
+					<div id="insertColorRow" class="form-row">
+						<label for="insertColor">颜色</label>
+						<input id="insertColor" class="color-input" type="color" value="#000000">
+					</div>
 				</div>
 				<div id="insertImageRow" class="form-row" hidden>
 					<label for="insertImage">图片</label>

assets/webui/ofdgo.css

@@ -108,7 +108,8 @@ a:focus-visible {
 	grid-template-columns: repeat(5, max-content);
 }
 
-.editor-group:has(#insertTextButton) {
+.editor-group:has(#insertTextButton),
+.editor-group:has(#textSize) {
 	grid-template-columns: repeat(2, max-content);
 }
 
@@ -120,8 +121,7 @@ a:focus-visible {
 	border-right: 0;
 }
 
-.editor-group > button,
-.editor-group > select {
+.editor-group > :not(span) {
 	grid-row: 1;
 }
 
@@ -419,7 +419,8 @@ button:not(:disabled):hover {
 .form-row input[type="text"],
 .form-row input[type="number"],
 .form-row input[type="file"],
-.form-row select {
+.form-row select,
+.text-size input {
 	width: 100%;
 	min-width: 0;
 	height: var(--control-height);
@@ -430,6 +431,33 @@ button:not(:disabled):hover {
 	color: #1f2428;
 }
 
+.form-unit.text-size {
+	grid-template-columns: calc(2em + 22px) auto;
+	gap: 6px;
+}
+
+.color-input {
+	width: calc(2em + 22px);
+	height: var(--control-height);
+	padding: 3px;
+	border: 1px solid var(--line);
+	border-radius: 0;
+	background: #ffffff;
+	cursor: pointer;
+}
+
+.color-input::-webkit-color-swatch-wrapper {
+	padding: 0;
+}
+
+.color-input::-webkit-color-swatch {
+	border: 0;
+}
+
+.color-input::-moz-color-swatch {
+	border: 0;
+}
+
 .form-row input[type="file"] {
 	padding: 0;
 	color: var(--text-muted);

assets/webui/ofdgo.js

@@ -89,6 +89,8 @@ const el = {
 	editTextButton: document.querySelector("#editTextButton"),
 	copyObjectButton: document.querySelector("#copyObjectButton"),
 	objectOrder: document.querySelector("#objectOrder"),
+	textSize: document.querySelector("#textSize"),
+	textColor: document.querySelector("#textColor"),
 	undoButton: document.querySelector("#undoButton"),
 	redoButton: document.querySelector("#redoButton"),
 	insertTextButton: document.querySelector("#insertTextButton"),
@@ -120,11 +122,13 @@ const el = {
 	insertTextRow: document.querySelector("#insertTextRow"),
 	insertFontRow: document.querySelector("#insertFontRow"),
 	insertSizeRow: document.querySelector("#insertSizeRow"),
+	insertColorRow: document.querySelector("#insertColorRow"),
 	insertImageRow: document.querySelector("#insertImageRow"),
 	insertText: document.querySelector("#insertText"),
 	insertFont: document.querySelector("#insertFont"),
 	insertFontAdd: document.querySelector("#insertFontAdd"),
 	insertSize: document.querySelector("#insertSize"),
+	insertColor: document.querySelector("#insertColor"),
 	insertImage: document.querySelector("#insertImage"),
 	insertStatus: document.querySelector("#insertStatus"),
 	insertCancel: document.querySelector("#insertCancel"),
@@ -249,6 +253,17 @@ el.editTextButton.addEventListener("click", () => {
 		openInsertPanel(true, canvasEditor.selected);
 	}
 });
+el.textSize.addEventListener("change", () => changeTextStyle(false));
+el.textColor.addEventListener("change", () => changeTextStyle(true));
+el.textSize.addEventListener("keydown", (event) => {
+	if (event.key === "Enter" || event.key === "Escape") {
+		event.preventDefault();
+		if (event.key === "Escape") {
+			updateObjectControls(canvasEditor.selected, true);
+		}
+		el.textSize.blur();
+	}
+});
 el.copyObjectButton.addEventListener("click", () => {
 	const item = canvasEditor.selected;
 	if (!item) {
@@ -628,11 +643,12 @@ async function openInsertPanel(text, item = null) {
 	if (item) {
 		state.insertFonts = [];
 		el.insertText.value = item.text;
-		el.insertSize.value = Number((item.size * 72 / 25.4).toPrecision(12));
+		el.insertSize.value = textPoints(item.size);
+		el.insertColor.value = item.color;
 	}
 	el.insertPanel.setAttribute("aria-label", item ? "修改文字" : text ? "添加文字" : "添加图片");
 	el.insertSubmit.textContent = item ? "修改" : "添加";
-	for (const [row, input] of [[el.insertTextRow, el.insertText], [el.insertFontRow, el.insertFont], [el.insertSizeRow, el.insertSize]]) {
+	for (const [row, input] of [[el.insertTextRow, el.insertText], [el.insertFontRow, el.insertFont], [el.insertSizeRow, el.insertSize], [el.insertColorRow, el.insertColor]]) {
 		row.hidden = !text;
 		input.disabled = !text;
 	}
@@ -690,16 +706,20 @@ async function insertObject(event) {
 			return;
 		}
 		const points = Number(el.insertSize.value);
-		const size = item && points === Number((item.size * 72 / 25.4).toPrecision(12)) ? item.size : points * 25.4 / 72;
+		const size = item && points === textPoints(item.size) ? item.size : points * 25.4 / 72;
 		const doc = item
-			? await callWASM("ofdgoUpdateText", item.index, item.id, el.insertText.value, data, size)
-			: text ? await callWASM("ofdgoInsertText", index, el.insertText.value, data, x, y, size)
+			? await callWASM("ofdgoUpdateText", item.index, item.id, el.insertText.value, data, size, el.insertColor.value === item.color ? null : el.insertColor.value)
+			: text ? await callWASM("ofdgoInsertText", index, el.insertText.value, data, x, y, size, el.insertColor.value)
 			: await callWASM("ofdgoInsertImage", index, data, x, y, page.width - x * 2);
 		if (openSeq !== state.openSeq) {
 			return;
 		}
-		setEditorInfo(doc);
 		el.insertPanel.close();
+		if (item && doc.revision === state.editorInfo?.revision) {
+			el.viewerPanel.focus({ preventScroll: true });
+			return;
+		}
+		setEditorInfo(doc);
 		canvasEditor.selectLast = !item;
 		state.selectObjects = true;
 		setPan(false);
@@ -723,6 +743,28 @@ async function insertObject(event) {
 	}
 }
 
+function textPoints(size) {
+	return Number((size * 72 / 25.4).toPrecision(12));
+}
+
+async function changeTextStyle(color) {
+	const item = canvasEditor.selected;
+	if (!item || item.image || !state.ready || state.exporting) {
+		return;
+	}
+	if (!color && !el.textSize.checkValidity()) {
+		showError(new Error("字号无效"), false);
+		updateObjectControls(item, true);
+		return;
+	}
+	const size = color || Number(el.textSize.value) === textPoints(item.size) ? item.size : Number(el.textSize.value) * 25.4 / 72;
+	const fill = color && el.textColor.value !== item.color ? el.textColor.value : null;
+	if (size !== item.size || fill !== null) {
+		await changeDocument("ofdgoUpdateText", item, color ? null : item.text, null, size, fill);
+	}
+	updateObjectControls(canvasEditor.selected, true);
+}
+
 async function changeDocument(name, item, ...args) {
 	if (!state.editing || document.body.hasAttribute("aria-busy")) {
 		return;
@@ -3796,10 +3838,17 @@ function updateEditorTools() {
 	el.redoButton.disabled = !state.editorInfo?.canRedo || !state.ready || state.exporting;
 }
 
-function updateObjectControls(item) {
+function updateObjectControls(item, reset = false) {
 	const disabled = !item || !state.ready || state.exporting;
 	el.deleteObjectButton.disabled = el.copyObjectButton.disabled = disabled;
 	el.editTextButton.disabled = !item || item.image || !state.ready || state.exporting;
+	el.textSize.disabled = el.textColor.disabled = el.editTextButton.disabled;
+	if (reset || el.textSize.disabled || document.activeElement !== el.textSize) {
+		el.textSize.value = item && !item.image ? textPoints(item.size) : "";
+	}
+	if (reset || el.textColor.disabled || document.activeElement !== el.textColor) {
+		el.textColor.value = item && !item.image ? item.color : "#000000";
+	}
 	el.objectOrder.disabled = disabled || item.count <= 1;
 	for (const option of el.objectOrder.options) {
 		option.disabled = disabled || (["up", "top"].includes(option.value) ? item.order === item.count - 1 : item.order === 0);

assets/webui/ofdgo_edit.js

@@ -119,13 +119,14 @@ export class CanvasEditor {
 			return;
 		}
 		const node = event.target.closest(".edit-object");
-		if (!node) {
-			this.select(null);
+		if (node) {
+			event.preventDefault();
+		}
+		this.viewer.focus({ preventScroll: true });
+		this.select(node ? this.nodes.get(node) : null);
+		if (!node || this.options.busy()) {
 			return;
 		}
-		event.preventDefault();
-		this.select(this.nodes.get(node));
-		this.viewer.focus({ preventScroll: true });
 		const item = this.selected;
 		this.drag = {
 			item, pointerID: event.pointerId, corner: event.target.dataset.corner || "",

internal/webui/wasm.go

@@ -20,6 +20,7 @@ import (
 	"bufio"
 	"bytes"
 	"context"
+	"encoding/hex"
 	"encoding/json"
 	"fmt"
 	"image"
@@ -611,6 +612,13 @@ func editorObjects(index int, text *ofdgo.PageText) ([]any, error) {
 				item := map[string]any{"id": id, "image": object.Type == "ImageObject", "x": box.X, "y": box.Y, "width": box.W, "height": box.H, "order": order, "count": len(layer.Objects)}
 				if object.Type == "TextObject" {
 					item["text"], item["font"], item["fontName"], item["size"] = textValues[id], object.TextObject.Font, fontNames[object.TextObject.Font], object.TextObject.Size
+					var r, g, b float64
+					if fill := object.TextObject.FillColor; fill != nil {
+						if _, err := fmt.Sscan(fill.Value, &r, &g, &b); err != nil {
+							return nil, err
+						}
+					}
+					item["color"] = fmt.Sprintf("#%02x%02x%02x", byte(r), byte(g), byte(b))
 				}
 				objects = append(objects, item)
 			}
@@ -794,8 +802,8 @@ func previewEditor(editor *ofdgo.Editor, annotations bool) (editorInfo, error) {
 	return editorSummary(), nil
 }
 
-// updateText 修改文字内容、字体和字号，空字体数据沿用对象字体
-// 入参: args 页码、对象标识、内容、字体数据和字号
+// updateText 修改文字，null内容保留排版，null字体数据和颜色沿用对象属性
+// 入参: args 页码、对象标识、内容、字体数据、字号和颜色
 // 返回: any 文档信息, error 错误信息
 func updateText(args []js.Value) (any, error) {
 	if currentEditor == nil {
@@ -806,25 +814,60 @@ func updateText(args []js.Value) (any, error) {
 	if err != nil {
 		return nil, err
 	}
-	fontID := object.TextObject.Font
+	if object.Type != "TextObject" {
+		return nil, fmt.Errorf("object %q is not text", id)
+	}
+	if !args[2].IsNull() {
 		if !args[3].IsNull() {
 			data, err := bytesFromJS(args[3])
 			if err != nil {
 				return nil, err
 			}
-		fontID, err = currentEditor.AddFont(FontFile{Data: data}, 0)
+			object.TextObject.Font, err = currentEditor.AddFont(FontFile{Data: data}, 0)
 			if err != nil {
 				return nil, err
 			}
 		}
-	if err := currentEditor.UpdateText(page, id, args[2].String(), fontID, args[4].Float()); err != nil {
+		object.TextObject.Size = args[4].Float()
+		if err := currentEditor.LayoutText(&object.TextObject, args[2].String()); err != nil {
 			return nil, err
 		}
+	}
+	if !args[5].IsNull() {
+		if err := setTextColor(&object.TextObject, args[5].String()); err != nil {
+			return nil, err
+		}
+	}
+	revision := currentEditor.Revision()
+	if err := currentEditor.UpdateObject(page, id, object); err != nil {
+		return nil, err
+	}
+	if currentEditor.Revision() == revision {
+		return editorSummary(), nil
+	}
 	return previewEditor(currentEditor, currentSession.Renderer.RenderAnnotations)
 }
 
+// setTextColor 将浏览器RGB色值写入文字对象，保留颜色透明度
+// 入参: object 文字对象, value 十六进制色值
+// 返回: error 错误信息
+func setTextColor(object *ofdgo.TextObject, value string) error {
+	if len(value) != 7 || value[0] != '#' {
+		return fmt.Errorf("invalid RGB color %q", value)
+	}
+	rgb, err := hex.DecodeString(value[1:])
+	if err != nil {
+		return err
+	}
+	if object.FillColor == nil {
+		object.FillColor = &ofdgo.FillColor{}
+	}
+	object.FillColor.Value = fmt.Sprintf("%d %d %d", rgb[0], rgb[1], rgb[2])
+	return nil
+}
+
 // insertText 使用选定字体创建文字对象
-// 入参: args 页码、内容、字体数据、横纵坐标和字号
+// 入参: args 页码、内容、字体数据、横纵坐标、字号和颜色
 // 返回: any 文档信息, error 错误信息
 func insertText(args []js.Value) (any, error) {
 	if currentEditor == nil {
@@ -849,7 +892,17 @@ func insertText(args []js.Value) (any, error) {
 	}
 	x, y := args[3].Float(), args[4].Float()
 	box = ofdgo.Box{X: x, Y: y, W: box.W - x, H: box.H - y}
-	if _, err := currentEditor.AddText(page, box, args[1].String(), fontID, args[5].Float()); err != nil {
+	object := ofdgo.GraphicObject{Type: "TextObject", TextObject: ofdgo.TextObject{
+		Boundary: fmt.Sprintf("%g %g %g %g", box.X, box.Y, box.W, box.H),
+		Font:     fontID, Size: args[5].Float(),
+	}}
+	if err := currentEditor.LayoutText(&object.TextObject, args[1].String()); err != nil {
+		return nil, err
+	}
+	if err := setTextColor(&object.TextObject, args[6].String()); err != nil {
+		return nil, err
+	}
+	if _, err := currentEditor.AddObject(page, object); err != nil {
 		return nil, err
 	}
 	return previewEditor(currentEditor, currentSession.Renderer.RenderAnnotations)

ofdgo_editor.go

@@ -621,7 +621,7 @@ func (e *Editor) AddText(page int, box Box, value, fontID string, size float64)
 		Boundary: fmt.Sprintf("%s %s %s %s", ofdNumber(box.X), ofdNumber(box.Y), ofdNumber(box.W), ofdNumber(box.H)),
 		Font:     fontID, Size: size,
 	}}
-	if err := e.layoutText(&object.TextObject, value); err != nil {
+	if err := e.LayoutText(&object.TextObject, value); err != nil {
 		return "", err
 	}
 	return e.AddObject(page, object)
@@ -641,7 +641,7 @@ func (e *Editor) UpdateText(page int, id, value, fontID string, size float64) er
 		return fmt.Errorf("object %q is not text", id)
 	}
 	object.TextObject.Font, object.TextObject.Size = fontID, size
-	if err := e.layoutText(&object.TextObject, value); err != nil {
+	if err := e.LayoutText(&object.TextObject, value); err != nil {
 		return err
 	}
 	object, err = e.prepareObject(id, object)
@@ -652,10 +652,11 @@ func (e *Editor) UpdateText(page int, id, value, fontID string, size float64) er
 	return nil
 }
 
-// layoutText 按嵌入字体度量设置横向单行文字的基线和字距
+// LayoutText 按嵌入字体度量重排横向单行文字，设置基线和字距，保留绘制属性
+// 不进行段落排版和复杂文字塑形，不修改文档，通过AddObject或UpdateObject提交
 // 入参: obj 文字对象, value 原文
 // 返回: error 错误信息
-func (e *Editor) layoutText(obj *TextObject, value string) error {
+func (e *Editor) LayoutText(obj *TextObject, value string) error {
 	if obj.ReadDirection != 0 || obj.CharDirection != 0 {
 		return fmt.Errorf("automatic text layout requires horizontal text")
 	}
@@ -663,6 +664,9 @@ func (e *Editor) layoutText(obj *TextObject, value string) error {
 	if !ok {
 		return fmt.Errorf("font resource %q not found", obj.Font)
 	}
+	if !finite(obj.Size) || obj.Size <= 0 || !finite(obj.HScale) || obj.HScale < 0 {
+		return fmt.Errorf("invalid text dimensions")
+	}
 	if !utf8.ValidString(value) || strings.ContainsAny(value, "\r\n\t") || value == "" {
 		return fmt.Errorf("text must be a nonempty UTF-8 line")
 	}