Merge pull request #16535 from calixteman/restore_freetext

[Editor] Allow to edit FreeText annotations

src/core/annotation.js

@@ -3553,7 +3553,7 @@ class FreeTextAnnotation extends MarkupAnnotation {
   constructor(params) {
     super(params);
 
-    this.data.hasOwnCanvas = this.data.noRotate;
+    this.data.hasOwnCanvas = true;
 
     const { xref } = params;
     this.data.annotationType = AnnotationType.FREETEXT;

src/display/annotation_layer.js

@@ -2629,7 +2629,7 @@ class AnnotationLayer {
 
   #div = null;
 
-  #editableAnnotations = new Set();
+  #editableAnnotations = new Map();
 
   constructor({ div, accessibilityManager, annotationCanvasMap }) {
     this.#div = div;
@@ -2696,7 +2696,7 @@ class AnnotationLayer {
       }
 
       if (element.annotationEditorType > 0) {
-        this.#editableAnnotations.add(element);
+        this.#editableAnnotations.set(element.data.id, element);
       }
 
       const rendered = element.render();
@@ -2767,7 +2767,11 @@ class AnnotationLayer {
   }
 
   getEditableAnnotations() {
-    return this.#editableAnnotations;
+    return Array.from(this.#editableAnnotations.values());
+  }
+
+  getEditableAnnotation(id) {
+    return this.#editableAnnotations.get(id);
   }
 }
 

src/display/editor/annotation_editor_layer.js

@@ -13,7 +13,6 @@
  * limitations under the License.
  */
 
-/** @typedef {import("./editor.js").AnnotationEditor} AnnotationEditor */
 // eslint-disable-next-line max-len
 /** @typedef {import("./tools.js").AnnotationEditorUIManager} AnnotationEditorUIManager */
 /** @typedef {import("../display_utils.js").PageViewport} PageViewport */
@@ -24,6 +23,7 @@
 /** @typedef {import("../src/display/annotation_layer.js").AnnotationLayer} AnnotationLayer */
 
 import { AnnotationEditorType, FeatureTest } from "../../shared/util.js";
+import { AnnotationEditor } from "./editor.js";
 import { bindEvents } from "./tools.js";
 import { FreeTextEditor } from "./freetext.js";
 import { InkEditor } from "./ink.js";
@@ -66,6 +66,8 @@ class AnnotationEditorLayer {
 
   #isCleaningUp = false;
 
+  #isDisabling = false;
+
   #uiManager;
 
   static _initialized = false;
@@ -86,6 +88,7 @@ class AnnotationEditorLayer {
     this.div = options.div;
     this.#accessibilityManager = options.accessibilityManager;
     this.#annotationLayer = options.annotationLayer;
+    this.viewport = options.viewport;
 
     this.#uiManager.addLayer(this);
   }
@@ -175,18 +178,33 @@ class AnnotationEditorLayer {
    */
   enable() {
     this.div.style.pointerEvents = "auto";
-    if (this.#annotationLayer) {
-      const editables = this.#annotationLayer.getEditableAnnotations();
-      for (const editable of editables) {
-        const editor = this.deserialize(editable);
-        if (!editor) {
-          continue;
-        }
-        editable.hide();
-        this.addOrRebuild(editor);
+    const annotationElementIds = new Set();
+    for (const editor of this.#editors.values()) {
+      editor.enableEditing();
+      if (editor.annotationElementId) {
+        annotationElementIds.add(editor.annotationElementId);
       }
     }
-    for (const editor of this.#editors.values()) {
+
+    if (!this.#annotationLayer) {
+      return;
+    }
+
+    const editables = this.#annotationLayer.getEditableAnnotations();
+    for (const editable of editables) {
+      // The element must be hidden whatever its state is.
+      editable.hide();
+      if (this.#uiManager.isDeletedAnnotationElement(editable.data.id)) {
+        continue;
+      }
+      if (annotationElementIds.has(editable.data.id)) {
+        continue;
+      }
+      const editor = this.deserialize(editable);
+      if (!editor) {
+        continue;
+      }
+      this.addOrRebuild(editor);
       editor.enableEditing();
     }
   }
@@ -195,18 +213,25 @@ class AnnotationEditorLayer {
    * Disable editor creation.
    */
   disable() {
+    this.#isDisabling = true;
     this.div.style.pointerEvents = "none";
     for (const editor of this.#editors.values()) {
       editor.disableEditing();
-      if (!editor.hasElementChanged()) {
-        editor.annotationElement.show();
-        editor.remove();
+      if (!editor.annotationElementId || editor.serialize() !== null) {
+        continue;
       }
+      this.getEditableAnnotation(editor.annotationElementId)?.show();
+      editor.remove();
     }
     this.#cleanup();
     if (this.isEmpty) {
       this.div.hidden = true;
     }
+    this.#isDisabling = false;
+  }
+
+  getEditableAnnotation(id) {
+    return this.#annotationLayer?.getEditableAnnotation(id) || null;
   }
 
   /**
@@ -234,11 +259,22 @@ class AnnotationEditorLayer {
 
   attach(editor) {
     this.#editors.set(editor.id, editor);
+    const { annotationElementId } = editor;
+    if (
+      annotationElementId &&
+      this.#uiManager.isDeletedAnnotationElement(annotationElementId)
+    ) {
+      this.#uiManager.removeDeletedAnnotationElement(editor);
+    }
   }
 
   detach(editor) {
     this.#editors.delete(editor.id);
     this.#accessibilityManager?.removePointerInTextLayer(editor.contentDiv);
+
+    if (!this.#isDisabling && editor.annotationElementId) {
+      this.#uiManager.addDeletedAnnotationElement(editor);
+    }
   }
 
   /**
@@ -249,8 +285,8 @@ class AnnotationEditorLayer {
     // Since we can undo a removal we need to keep the
     // parent property as it is, so don't null it!
 
-    this.#uiManager.removeEditor(editor);
     this.detach(editor);
+    this.#uiManager.removeEditor(editor);
     editor.div.style.display = "none";
     setTimeout(() => {
       // When the div is removed from DOM the focus can move on the
@@ -280,6 +316,12 @@ class AnnotationEditorLayer {
       return;
     }
 
+    if (editor.annotationElementId) {
+      this.#uiManager.addDeletedAnnotationElement(editor.annotationElementId);
+      AnnotationEditor.deleteAnnotationElement(editor);
+      editor.annotationElementId = null;
+    }
+
     this.attach(editor);
     editor.parent?.detach(editor);
     editor.setParent(this);

src/display/editor/editor.js

@@ -67,7 +67,7 @@ class AnnotationEditor {
     this.name = parameters.name;
     this.div = null;
     this._uiManager = parameters.uiManager;
-    this.annotationElement = null;
+    this.annotationElementId = null;
 
     const {
       rotation,
@@ -85,6 +85,7 @@ class AnnotationEditor {
     this.y = parameters.y / height;
 
     this.isAttachedToDOM = false;
+    this.deleted = false;
   }
 
   static get _defaultLineColor() {
@@ -95,6 +96,17 @@ class AnnotationEditor {
     );
   }
 
+  static deleteAnnotationElement(editor) {
+    const fakeEditor = new FakeEditor({
+      id: editor.parent.getNextId(),
+      parent: editor.parent,
+      uiManager: editor._uiManager,
+    });
+    fakeEditor.annotationElementId = editor.annotationElementId;
+    fakeEditor.deleted = true;
+    fakeEditor._uiManager.addToAnnotationStorage(fakeEditor);
+  }
+
   /**
    * Add some commands into the CommandManager (undo/redo stuff).
    * @param {Object} params
@@ -601,14 +613,22 @@ class AnnotationEditor {
       this.parent.setActiveEditor(null);
     }
   }
+}
 
-  /**
-   * Check if the editor has been changed.
-   * @param {Object} serialized
-   * @returns {boolean}
-   */
-  hasElementChanged(serialized = null) {
-    return false;
+// This class is used to fake an editor which has been deleted.
+class FakeEditor extends AnnotationEditor {
+  constructor(params) {
+    super(params);
+    this.annotationElementId = params.annotationElementId;
+    this.deleted = true;
+  }
+
+  serialize() {
+    return {
+      id: this.annotationElementId,
+      deleted: true,
+      pageIndex: this.pageIndex,
+    };
   }
 }
 

src/display/editor/freetext.js

@@ -48,6 +48,8 @@ class FreeTextEditor extends AnnotationEditor {
 
   #fontSize;
 
+  #initialData = null;
+
   static _freeTextDefaultContent = "";
 
   static _l10nPromise;
@@ -285,6 +287,7 @@ class FreeTextEditor extends AnnotationEditor {
   /** @inheritdoc */
   onceAdded() {
     if (this.width) {
+      this.#cheatInitialRect();
       // The editor was created in using ctrl+c.
       return;
     }
@@ -481,12 +484,17 @@ class FreeTextEditor extends AnnotationEditor {
     if (this.width) {
       // This editor was created in using copy (ctrl+c).
       const [parentWidth, parentHeight] = this.parentDimensions;
-      this.setAt(
-        baseX * parentWidth,
-        baseY * parentHeight,
-        this.width * parentWidth,
-        this.height * parentHeight
-      );
+      if (this.annotationElementId) {
+        const [tx] = this.getInitialTranslation();
+        this.setAt(baseX * parentWidth, baseY * parentHeight, tx, tx);
+      } else {
+        this.setAt(
+          baseX * parentWidth,
+          baseY * parentHeight,
+          this.width * parentWidth,
+          this.height * parentHeight
+        );
+      }
 
       this.#setContent();
       this.div.draggable = true;
@@ -519,14 +527,37 @@ class FreeTextEditor extends AnnotationEditor {
 
   /** @inheritdoc */
   static deserialize(data, parent, uiManager) {
+    let initialData = null;
     if (data instanceof FreeTextAnnotationElement) {
-      return null;
+      const {
+        data: {
+          defaultAppearanceData: { fontSize, fontColor },
+          rect,
+          rotation,
+          id,
+        },
+        textContent,
+        page: { pageNumber },
+      } = data;
+      initialData = data = {
+        annotationType: AnnotationEditorType.FREETEXT,
+        color: Array.from(fontColor),
+        fontSize,
+        value: textContent.join("\n"),
+        pageIndex: pageNumber - 1,
+        rect,
+        rotation,
+        id,
+        deleted: false,
+      };
     }
     const editor = super.deserialize(data, parent, uiManager);
 
     editor.#fontSize = data.fontSize;
     editor.#color = Util.makeHexColor(...data.color);
     editor.#content = data.value;
+    editor.annotationElementId = data.id || null;
+    editor.#initialData = initialData;
 
     return editor;
   }
@@ -537,16 +568,23 @@ class FreeTextEditor extends AnnotationEditor {
       return null;
     }
 
+    if (this.deleted) {
+      return {
+        pageIndex: this.pageIndex,
+        id: this.annotationElementId,
+        deleted: true,
+      };
+    }
+
     const padding = FreeTextEditor._internalPadding * this.parentScale;
     const rect = this.getRect(padding, padding);
-
     const color = AnnotationEditor._colorManager.convert(
       this.isAttachedToDOM
         ? getComputedStyle(this.editorDiv).color
         : this.#color
     );
 
-    return {
+    const serialized = {
       annotationType: AnnotationEditorType.FREETEXT,
       color,
       fontSize: this.#fontSize,
@@ -554,7 +592,45 @@ class FreeTextEditor extends AnnotationEditor {
       pageIndex: this.pageIndex,
       rect,
       rotation: this.rotation,
+      id: this.annotationElementId,
     };
+
+    if (this.annotationElementId && !this.#hasElementChanged(serialized)) {
+      return null;
+    }
+
+    return serialized;
+  }
+
+  #hasElementChanged(serialized) {
+    const { value, fontSize, color, rect, pageIndex } = this.#initialData;
+
+    return (
+      serialized.value !== value ||
+      serialized.fontSize !== fontSize ||
+      serialized.rect.some((x, i) => Math.abs(x - rect[i]) >= 1) ||
+      serialized.color.some((c, i) => c !== color[i]) ||
+      serialized.pageIndex !== pageIndex
+    );
+  }
+
+  #cheatInitialRect(delayed = false) {
+    // The annotation has a rect but the editor has an other one.
+    // When we want to know if the annotation has changed (e.g. has been moved)
+    // we must compare the editor initial rect with the current one.
+    // So this method is a hack to have a way to compare the real rects.
+    if (!this.annotationElementId) {
+      return;
+    }
+
+    this.#setEditorDimensions();
+    if (!delayed && (this.width === 0 || this.height === 0)) {
+      setTimeout(() => this.#cheatInitialRect(/* delayed = */ true), 0);
+      return;
+    }
+
+    const padding = FreeTextEditor._internalPadding * this.parentScale;
+    this.#initialData.rect = this.getRect(padding, padding);
   }
 }
 

src/display/editor/tools.js

@@ -362,6 +362,8 @@ class AnnotationEditorUIManager {
 
   #currentPageIndex = 0;
 
+  #deletedAnnotationsElementIds = new Set();
+
   #editorTypes = null;
 
   #editorsToRescale = new Set();
@@ -554,7 +556,11 @@ class AnnotationEditorUIManager {
     const editors = [];
     for (const editor of this.#selectedEditors) {
       if (!editor.isEmpty()) {
-        editors.push(editor.serialize());
+        const serialized = editor.serialize();
+        // Remove the id from the serialized data because it mustn't be linked
+        // to an existing annotation.
+        delete serialized.id;
+        editors.push(serialized);
       }
     }
     if (editors.length === 0) {
@@ -862,7 +868,39 @@ class AnnotationEditorUIManager {
   removeEditor(editor) {
     this.#allEditors.delete(editor.id);
     this.unselect(editor);
-    this.#annotationStorage?.remove(editor.id);
+    if (
+      !editor.annotationElementId ||
+      !this.#deletedAnnotationsElementIds.has(editor.annotationElementId)
+    ) {
+      this.#annotationStorage?.remove(editor.id);
+    }
+  }
+
+  /**
+   * The annotation element with the given id has been deleted.
+   * @param {AnnotationEditor} editor
+   */
+  addDeletedAnnotationElement(editor) {
+    this.#deletedAnnotationsElementIds.add(editor.annotationElementId);
+    editor.deleted = true;
+  }
+
+  /**
+   * Check if the annotation element with the given id has been deleted.
+   * @param {string} annotationElementId
+   * @returns {boolean}
+   */
+  isDeletedAnnotationElement(annotationElementId) {
+    return this.#deletedAnnotationsElementIds.has(annotationElementId);
+  }
+
+  /**
+   * The annotation element with the given id have been restored.
+   * @param {AnnotationEditor} editor
+   */
+  removeDeletedAnnotationElement(editor) {
+    this.#deletedAnnotationsElementIds.delete(editor.annotationElementId);
+    editor.deleted = false;
   }
 
   /**