feat: 优化部分问题，完善选区功能

2025-07-04 03:16:18 +08:00
parent b6afd2764d
commit 0615ab31f9
12 changed files with 1892 additions and 1144 deletions
--- a/src/component/Canvas/CanvasEditor/commands/ClearSelectionContentCommand.js
+++ b/src/component/Canvas/CanvasEditor/commands/ClearSelectionContentCommand.js
@@ -0,0 +1,527 @@
+import { fabric } from "fabric-with-all";
+import { Command } from "./Command";
+import { createRasterizedImage } from "../utils/selectionToImage";
+import { deepClone, findObjectById, generateId } from "../utils/helper";
+import { findLayerRecursively } from "../utils/layerHelper";
+
+/**
+ * 从选区中删除内容命令
+ * 使用栅格化方式清除选区内容，支持复杂选区形状
+ */
+export class ClearSelectionContentCommand extends Command {
+  constructor(options = {}) {
+    super({
+      name: "清除选区内容",
+      description: "使用栅格化方式删除选区中的内容",
+      saveState: true,
+    });
+    this.canvas = options.canvas;
+    this.layers = options.layerManager?.layers;
+    this.layerManager = options.layerManager;
+    this.selectionManager = options.selectionManager;
+    this.targetLayerId = options.layerManager.getActiveLayerId(); // 默认使用当前活动图层
+    this.removedObjects = [];
+
+    this.oldLayer = [...this.layers.value]; // 获取原图层对象
+
+    const { layer } =
+      findLayerRecursively(this.layers.value, this.targetLayerId) || {};
+
+    // 栅格化相关属性
+    this.originalLayerBackup = null;
+
+    const { object: originalLayerObject } = findObjectById(
+      this.canvas,
+      layer.fabricObjects?.[0]?.id
+    );
+
+    // this.originalLayerObject = fabric.util.object.clone(originalLayerObject); // 获取原图层对象
+
+    this.oldLayerObjects = originalLayerObject.toObject([
+      "id",
+      "layerId",
+      "layerName",
+    ]); // 获取原图层的所有对象
+
+    this.rasterizedImage = null;
+    this.targetLayer = findLayerRecursively(
+      this.canvas,
+      this.targetLayerId
+    )?.layer;
+
+    this.layerRasterized = false;
+
+    // 高清设置
+    this.highResolutionEnabled = options.highResolutionEnabled !== false;
+    this.baseResolutionScale = options.baseResolutionScale || 2;
+
+    // 支持外部传入选区对象，优先使用外部传入的选区对象
+    if (options.selectionObject) {
+      // 外部传入的选区对象，直接使用
+      this.selectionObject = options.selectionObject;
+      console.log("清除选区内容：使用外部传入的选区对象");
+    } else {
+      // 从选区管理器获取选区对象
+      const currentSelection = this.selectionManager?.getSelectionObject();
+      if (currentSelection) {
+        this.selectionObject = fabric.util.object.clone(currentSelection);
+        console.log("清除选区内容：从选区管理器获取选区对象");
+      } else {
+        this.selectionObject = null;
+        console.warn("清除选区内容：没有可用的选区对象");
+      }
+    }
+  }
+
+  async execute() {
+    if (!this.canvas || !this.layerManager) {
+      console.error("无法清除选区内容：参数无效");
+      return false;
+    }
+
+    try {
+      // 获取选区
+
+      if (!this.selectionObject) {
+        console.error("无法清除选区内容：当前没有选区");
+        return false;
+      }
+
+      // 确定目标图层
+      const layerId =
+        this.targetLayerId || this.layerManager.getActiveLayerId();
+      this.targetLayer = this.layerManager.getLayerById(layerId);
+      if (!this.targetLayer) {
+        console.error("无法清除选区内容：目标图层无效");
+        return false;
+      }
+
+      // 备份原图层状态
+      // this.originalLayerBackup = JSON.parse(JSON.stringify(this.targetLayer));
+
+      // 获取图层的所有对象
+      const layerObjects = this._getLayerObjects(this.targetLayer);
+      if (layerObjects.length === 0) {
+        console.warn("目标图层没有对象，无需清除");
+        return true;
+      }
+
+      // 创建反转选区（保留选区外的内容）
+      const invertedSelection = await this._createInvertedSelection(
+        this.selectionObject
+      );
+      if (!invertedSelection) {
+        console.error("创建反转选区失败");
+        return false;
+      }
+
+      // 使用栅格化方式清除选区内容
+      await this._rasterizeLayerWithClearance(layerObjects, invertedSelection);
+
+      // 清除选区
+      this.selectionManager?.clearSelection?.();
+
+      console.log("✅ 选区内容清除完成");
+      return { cleared: true, layerId: this.targetLayer.id };
+    } catch (error) {
+      console.error("清除选区内容失败:", error);
+      // 尝试恢复原状态
+      await this._restoreOriginalState();
+      throw error;
+    }
+  }
+
+  async undo() {
+    try {
+      this.layers.value = this.oldLayer; // 恢复原图层对象
+
+      // 恢复原图层状态
+      // 移除栅格化后的图像
+      if (
+        this.rasterizedImage &&
+        this.canvas.getObjects().includes(this.rasterizedImage)
+      ) {
+        this.canvas.remove(this.rasterizedImage);
+      }
+
+      // 恢复图层的fabricObjects
+      // 重新创建并添加对象到画布
+      if (this.targetLayer.fabricObjects.length > 0) {
+        await new Promise((resolve) => {
+          fabric.util.enlivenObjects([this.oldLayerObjects], (objects) => {
+            objects.forEach((obj) => {
+              // 确保对象有正确的ID和图层信息
+              obj.set({
+                layerId: this.targetLayer.id,
+                layerName: this.targetLayer.name,
+                selectable: true,
+                evented: true,
+              });
+
+              // 添加到画布
+              this.canvas.add(obj);
+
+              this.targetLayer.fabricObjects = [
+                obj.toObject(["id", "layerId", "layerName", "type", "custom"]),
+              ];
+            });
+
+            this.canvas.renderAll();
+            resolve();
+          });
+        });
+      }
+
+      await this.layerManager?.updateLayersObjectsInteractivity?.(true);
+
+      this.layerRasterized = false;
+      this.rasterizedImage = null;
+
+      console.log("✅ 清除选区内容撤销完成");
+      return true;
+    } catch (error) {
+      console.error("❌ 撤销清除选区内容失败:", error);
+      return false;
+    }
+  }
+
+  /**
+   * 使用栅格化方式清除选区内容
+   * @param {Array} layerObjects 图层对象数组
+   * @param {Object} invertedSelection 反转选区
+   * @private
+   */
+  async _rasterizeLayerWithClearance(layerObjects, invertedSelection) {
+    try {
+      console.log("🖼️ 开始栅格化图层并清除选区内容");
+
+      // 确定缩放因子
+      let scaleFactor = this.baseResolutionScale;
+      if (this.highResolutionEnabled) {
+        const currentZoom = this.canvas.getZoom?.() || 1;
+        scaleFactor = Math.max(
+          scaleFactor || this.canvas?.getRetinaScaling?.(),
+          currentZoom
+        );
+        scaleFactor = Math.min(scaleFactor, 3);
+      }
+
+      // 使用createRasterizedImage生成栅格化图像，使用反转选区作为裁剪路径
+      this.rasterizedImage = await createRasterizedImage({
+        canvas: this.canvas,
+        fabricObjects: layerObjects,
+        clipPath: invertedSelection, // 使用反转选区，保留选区外的内容
+        trimWhitespace: false, // 保持原始尺寸
+        trimPadding: 0,
+        quality: 1.0,
+        format: "png",
+        scaleFactor: scaleFactor,
+        preserveOriginalQuality: true,
+        selectionManager: this.selectionManager,
+      });
+
+      if (!this.rasterizedImage) {
+        throw new Error("栅格化图层失败");
+      }
+
+      // 移除原图层的所有对象
+      for (const obj of layerObjects) {
+        if (this.canvas.getObjects().includes(obj)) {
+          this.canvas.remove(obj);
+        }
+      }
+
+      // 设置栅格化图像的属性
+      this.rasterizedImage.set({
+        id: generateId("cleared_"),
+        layerId: this.targetLayer.id,
+        layerName: this.targetLayer.name,
+        selectable: true,
+        evented: true,
+      });
+
+      // 添加栅格化图像到画布和图层
+      this.canvas.add(this.rasterizedImage);
+      this.targetLayer.fabricObjects = [
+        this.rasterizedImage.toObject("id", "layerId", "layerName", "parentId"),
+      ];
+
+      this.layerRasterized = true;
+      this.canvas.renderAll();
+
+      console.log("✅ 图层栅格化清除完成");
+    } catch (error) {
+      console.error("栅格化图层清除失败:", error);
+      throw error;
+    }
+  }
+
+  /**
+   * 创建反转选区
+   * @param {Object} selectionObject 原选区对象
+   * @returns {Object} 反转选区对象
+   * @private
+   */
+  async _createInvertedSelection(selectionObject) {
+    try {
+      // 获取目标图层的所有对象
+      const layerObjects = this._getLayerObjects(this.targetLayer);
+      if (layerObjects.length === 0) {
+        console.warn("目标图层没有对象，无法创建反选区");
+        return null;
+      }
+
+      // 计算图层对象的边界框
+      const layerBounds = this._calculateLayerBounds(layerObjects);
+      if (!layerBounds) {
+        console.warn("无法计算图层边界框");
+        return null;
+      }
+
+      console.log("📐 图层边界框:", layerBounds);
+      console.log("🎯 选区路径:", selectionObject.path);
+
+      // 创建反转选区路径，使用图层边界而不是画布边界
+      const pathString = `M ${layerBounds.left} ${layerBounds.top} L ${
+        layerBounds.left + layerBounds.width
+      } ${layerBounds.top} L ${layerBounds.left + layerBounds.width} ${
+        layerBounds.top + layerBounds.height
+      } L ${layerBounds.left} ${layerBounds.top + layerBounds.height} Z ${
+        selectionObject.path
+      }`;
+
+      const invertedPath = new fabric.Path(pathString, {
+        fillRule: "evenodd",
+        selectable: false,
+        evented: false,
+        fill: "#ffffff", // 确保填充颜色
+        stroke: "",
+        strokeWidth: 0,
+        id: `inverted_selection_${Date.now()}`,
+        name: "inverted_selection",
+      });
+
+      console.log("✅ 反转选区创建完成，使用图层边界框");
+      return invertedPath;
+    } catch (error) {
+      console.error("创建反转选区失败:", error);
+      return null;
+    }
+  }
+
+  /**
+   * 计算图层对象的边界框
+   * @param {Array} layerObjects 图层对象数组
+   * @returns {Object|null} 边界框 {left, top, width, height}
+   * @private
+   */
+  _calculateLayerBounds(layerObjects) {
+    if (!layerObjects || layerObjects.length === 0) {
+      return null;
+    }
+
+    let bounds = null;
+
+    layerObjects.forEach((obj) => {
+      // 获取对象的边界框（包含变换）
+      const objBounds = obj.getBoundingRect(true, true);
+
+      if (!bounds) {
+        bounds = { ...objBounds };
+      } else {
+        const right = Math.max(
+          bounds.left + bounds.width,
+          objBounds.left + objBounds.width
+        );
+        const bottom = Math.max(
+          bounds.top + bounds.height,
+          objBounds.top + objBounds.height
+        );
+
+        bounds.left = Math.min(bounds.left, objBounds.left);
+        bounds.top = Math.min(bounds.top, objBounds.top);
+        bounds.width = right - bounds.left;
+        bounds.height = bottom - bounds.top;
+      }
+    });
+
+    // 添加一些边距以确保完整覆盖
+    if (bounds) {
+      const padding = 2;
+      bounds.left -= padding;
+      bounds.top -= padding;
+      bounds.width += padding * 2;
+      bounds.height += padding * 2;
+    }
+
+    return bounds;
+  }
+
+  /**
+   * 获取图层的所有对象
+   * @param {Object} layer 图层对象
+   * @returns {Array} fabric对象数组
+   * @private
+   */
+  _getLayerObjects(layer) {
+    const objects = [];
+    const canvasObjects = this.canvas.getObjects();
+
+    // 递归获取图层及其子图层的所有对象
+    const collectLayerObjects = (currentLayer) => {
+      // 处理图层的fabricObjects
+      if (
+        currentLayer.fabricObjects &&
+        Array.isArray(currentLayer.fabricObjects)
+      ) {
+        currentLayer.fabricObjects.forEach((fabricObj) => {
+          if (fabricObj && fabricObj.id) {
+            const realObject = canvasObjects.find(
+              (canvasObj) => canvasObj.id === fabricObj.id
+            );
+            if (realObject && realObject.visible !== false) {
+              objects.push(realObject);
+            }
+          }
+        });
+      }
+
+      // 处理单个fabricObject（背景图层等）
+      if (currentLayer.fabricObject && currentLayer.fabricObject.id) {
+        const realObject = canvasObjects.find(
+          (canvasObj) => canvasObj.id === currentLayer.fabricObject.id
+        );
+        if (realObject && realObject.visible !== false) {
+          objects.push(realObject);
+        }
+      }
+
+      // 递归处理子图层
+      if (currentLayer.children && Array.isArray(currentLayer.children)) {
+        currentLayer.children.forEach((childLayer) => {
+          collectLayerObjects(childLayer);
+        });
+      }
+    };
+
+    collectLayerObjects(layer);
+    return objects;
+  }
+
+  /**
+   * 恢复原图层状态
+   * @private
+   */
+  async _restoreOriginalState() {
+    try {
+      if (!this.originalLayerBackup || !this.targetLayer) {
+        console.warn("没有原图层备份数据或目标图层");
+        return;
+      }
+
+      // 移除栅格化后的图像
+      if (
+        this.rasterizedImage &&
+        this.canvas.getObjects().includes(this.rasterizedImage)
+      ) {
+        this.canvas.remove(this.rasterizedImage);
+      }
+
+      // 恢复图层的fabricObjects
+      this.targetLayer.fabricObjects =
+        this.originalLayerBackup.fabricObjects || [];
+
+      // 重新创建并添加对象到画布
+      if (this.targetLayer.fabricObjects.length > 0) {
+        await this._restoreLayerObjects(this.targetLayer);
+      }
+
+      this.layerRasterized = false;
+      this.rasterizedImage = null;
+
+      console.log("✅ 原图层状态恢复完成");
+    } catch (error) {
+      console.error("恢复原图层状态失败:", error);
+    }
+  }
+
+  /**
+   * 恢复图层对象到画布
+   * @param {Object} layer 图层对象
+   * @private
+   */
+  async _restoreLayerObjects(layer) {
+    return new Promise((resolve) => {
+      if (!layer.fabricObjects || layer.fabricObjects.length === 0) {
+        resolve();
+        return;
+      }
+
+      fabric.util.enlivenObjects(layer.fabricObjects, (objects) => {
+        objects.forEach((obj) => {
+          // 确保对象有正确的ID和图层信息
+          obj.set({
+            layerId: layer.id,
+            layerName: layer.name,
+            selectable: true,
+            evented: true,
+          });
+
+          // 添加到画布
+          this.canvas.add(obj);
+        });
+
+        this.canvas.renderAll();
+        resolve();
+      });
+    });
+  }
+
+  _cloneObjectSync(obj) {
+    // 这是一个简单的深拷贝，不适用于所有场景
+    // 在实际应用中，应该使用fabric.js的clone方法
+    if (!obj) return null;
+    return JSON.parse(JSON.stringify(obj));
+  }
+
+  async _cloneObject(obj) {
+    return new Promise((resolve, reject) => {
+      if (!obj) {
+        reject(new Error("对象无效，无法克隆"));
+        return;
+      }
+
+      try {
+        if (typeof obj.clone === "function") {
+          obj.clone((cloned) => {
+            resolve(cloned);
+          });
+        } else {
+          // 如果对象没有clone方法(可能是因为它已经是序列化后的对象)
+          // 在实际代码中需要适当处理这种情况
+          resolve(Object.assign({}, obj));
+        }
+      } catch (error) {
+        reject(error);
+      }
+    });
+  }
+
+  /**
+   * 获取命令信息
+   * @returns {Object} 命令详细信息
+   */
+  getInfo() {
+    return {
+      name: this.name,
+      description: this.description,
+      targetLayerId: this.targetLayer?.id,
+      targetLayerName: this.targetLayer?.name,
+      layerRasterized: this.layerRasterized,
+      hasOriginalBackup: !!this.originalLayerBackup,
+      removedObjectsCount: this.removedObjects.length,
+      highResolutionEnabled: this.highResolutionEnabled,
+      baseResolutionScale: this.baseResolutionScale,
+    };
+  }
+}