716 lines
19 KiB
JavaScript
716 lines
19 KiB
JavaScript
/* Copyright 2022 Mozilla Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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// eslint-disable-next-line max-len
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/** @typedef {import("./annotation_editor_layer.js").AnnotationEditorLayer} AnnotationEditorLayer */
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import {
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AnnotationEditorParamsType,
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AnnotationEditorType,
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assert,
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LINE_FACTOR,
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shadow,
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Util,
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} from "../../shared/util.js";
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import { bindEvents, KeyboardManager } from "./tools.js";
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import { AnnotationEditor } from "./editor.js";
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import { FreeTextAnnotationElement } from "../annotation_layer.js";
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/**
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* Basic text editor in order to create a FreeTex annotation.
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*/
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class FreeTextEditor extends AnnotationEditor {
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#boundEditorDivBlur = this.editorDivBlur.bind(this);
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#boundEditorDivFocus = this.editorDivFocus.bind(this);
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#boundEditorDivInput = this.editorDivInput.bind(this);
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#boundEditorDivKeydown = this.editorDivKeydown.bind(this);
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#color;
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#content = "";
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#editorDivId = `${this.id}-editor`;
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#fontSize;
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#initialData = null;
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static _freeTextDefaultContent = "";
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static _l10nPromise;
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static _internalPadding = 0;
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static _defaultColor = null;
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static _defaultFontSize = 10;
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static get _keyboardManager() {
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return shadow(
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this,
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"_keyboardManager",
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new KeyboardManager([
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[
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// Commit the text in case the user use ctrl+s to save the document.
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// The event must bubble in order to be caught by the viewer.
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// See bug 1831574.
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["ctrl+s", "mac+meta+s", "ctrl+p", "mac+meta+p"],
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FreeTextEditor.prototype.commitOrRemove,
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/* bubbles = */ true,
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],
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[
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["ctrl+Enter", "mac+meta+Enter", "Escape", "mac+Escape"],
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FreeTextEditor.prototype.commitOrRemove,
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],
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])
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);
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}
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static _type = "freetext";
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constructor(params) {
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super({ ...params, name: "freeTextEditor" });
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this.#color =
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params.color ||
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FreeTextEditor._defaultColor ||
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AnnotationEditor._defaultLineColor;
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this.#fontSize = params.fontSize || FreeTextEditor._defaultFontSize;
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}
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/** @inheritdoc */
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static initialize(l10n) {
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this._l10nPromise = new Map(
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["free_text2_default_content", "editor_free_text2_aria_label"].map(
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str => [str, l10n.get(str)]
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)
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);
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const style = getComputedStyle(document.documentElement);
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if (typeof PDFJSDev === "undefined" || PDFJSDev.test("TESTING")) {
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const lineHeight = parseFloat(
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style.getPropertyValue("--freetext-line-height")
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);
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assert(
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lineHeight === LINE_FACTOR,
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"Update the CSS variable to agree with the constant."
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);
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}
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this._internalPadding = parseFloat(
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style.getPropertyValue("--freetext-padding")
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);
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}
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/** @inheritdoc */
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static updateDefaultParams(type, value) {
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switch (type) {
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case AnnotationEditorParamsType.FREETEXT_SIZE:
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FreeTextEditor._defaultFontSize = value;
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break;
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case AnnotationEditorParamsType.FREETEXT_COLOR:
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FreeTextEditor._defaultColor = value;
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break;
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}
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}
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/** @inheritdoc */
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updateParams(type, value) {
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switch (type) {
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case AnnotationEditorParamsType.FREETEXT_SIZE:
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this.#updateFontSize(value);
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break;
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case AnnotationEditorParamsType.FREETEXT_COLOR:
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this.#updateColor(value);
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break;
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}
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}
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/** @inheritdoc */
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static get defaultPropertiesToUpdate() {
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return [
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[
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AnnotationEditorParamsType.FREETEXT_SIZE,
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FreeTextEditor._defaultFontSize,
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],
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[
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AnnotationEditorParamsType.FREETEXT_COLOR,
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FreeTextEditor._defaultColor || AnnotationEditor._defaultLineColor,
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],
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];
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}
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/** @inheritdoc */
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get propertiesToUpdate() {
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return [
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[AnnotationEditorParamsType.FREETEXT_SIZE, this.#fontSize],
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[AnnotationEditorParamsType.FREETEXT_COLOR, this.#color],
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];
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}
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/**
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* Update the font size and make this action as undoable.
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* @param {number} fontSize
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*/
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#updateFontSize(fontSize) {
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const setFontsize = size => {
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this.editorDiv.style.fontSize = `calc(${size}px * var(--scale-factor))`;
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this.translate(0, -(size - this.#fontSize) * this.parentScale);
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this.#fontSize = size;
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this.#setEditorDimensions();
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};
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const savedFontsize = this.#fontSize;
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this.addCommands({
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cmd: () => {
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setFontsize(fontSize);
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},
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undo: () => {
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setFontsize(savedFontsize);
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},
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mustExec: true,
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type: AnnotationEditorParamsType.FREETEXT_SIZE,
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overwriteIfSameType: true,
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keepUndo: true,
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});
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}
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/**
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* Update the color and make this action undoable.
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* @param {string} color
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*/
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#updateColor(color) {
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const savedColor = this.#color;
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this.addCommands({
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cmd: () => {
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this.#color = this.editorDiv.style.color = color;
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},
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undo: () => {
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this.#color = this.editorDiv.style.color = savedColor;
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},
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mustExec: true,
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type: AnnotationEditorParamsType.FREETEXT_COLOR,
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overwriteIfSameType: true,
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keepUndo: true,
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});
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}
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/** @inheritdoc */
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getInitialTranslation() {
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// The start of the base line is where the user clicked.
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const scale = this.parentScale;
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return [
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-FreeTextEditor._internalPadding * scale,
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-(FreeTextEditor._internalPadding + this.#fontSize) * scale,
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];
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}
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/** @inheritdoc */
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rebuild() {
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super.rebuild();
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if (this.div === null) {
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return;
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}
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if (!this.isAttachedToDOM) {
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// At some point this editor was removed and we're rebuilting it,
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// hence we must add it to its parent.
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this.parent.add(this);
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}
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}
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/** @inheritdoc */
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enableEditMode() {
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if (this.isInEditMode()) {
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return;
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}
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this.parent.setEditingState(false);
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this.parent.updateToolbar(AnnotationEditorType.FREETEXT);
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super.enableEditMode();
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this.overlayDiv.classList.remove("enabled");
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this.editorDiv.contentEditable = true;
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this.div.draggable = false;
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this.div.removeAttribute("aria-activedescendant");
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this.editorDiv.addEventListener("keydown", this.#boundEditorDivKeydown);
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this.editorDiv.addEventListener("focus", this.#boundEditorDivFocus);
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this.editorDiv.addEventListener("blur", this.#boundEditorDivBlur);
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this.editorDiv.addEventListener("input", this.#boundEditorDivInput);
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}
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/** @inheritdoc */
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disableEditMode() {
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if (!this.isInEditMode()) {
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return;
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}
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this.parent.setEditingState(true);
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super.disableEditMode();
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this.overlayDiv.classList.add("enabled");
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this.editorDiv.contentEditable = false;
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this.div.setAttribute("aria-activedescendant", this.#editorDivId);
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this.div.draggable = true;
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this.editorDiv.removeEventListener("keydown", this.#boundEditorDivKeydown);
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this.editorDiv.removeEventListener("focus", this.#boundEditorDivFocus);
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this.editorDiv.removeEventListener("blur", this.#boundEditorDivBlur);
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this.editorDiv.removeEventListener("input", this.#boundEditorDivInput);
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// On Chrome, the focus is given to <body> when contentEditable is set to
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// false, hence we focus the div.
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this.div.focus({
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preventScroll: true /* See issue #15744 */,
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});
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// In case the blur callback hasn't been called.
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this.isEditing = false;
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this.parent.div.classList.add("freeTextEditing");
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}
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/** @inheritdoc */
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focusin(event) {
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super.focusin(event);
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if (event.target !== this.editorDiv) {
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this.editorDiv.focus();
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}
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}
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/** @inheritdoc */
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onceAdded() {
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if (this.width) {
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this.#cheatInitialRect();
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// The editor was created in using ctrl+c.
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return;
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}
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this.enableEditMode();
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this.editorDiv.focus();
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}
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/** @inheritdoc */
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isEmpty() {
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return !this.editorDiv || this.editorDiv.innerText.trim() === "";
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}
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/** @inheritdoc */
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remove() {
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this.isEditing = false;
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if (this.parent) {
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this.parent.setEditingState(true);
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this.parent.div.classList.add("freeTextEditing");
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}
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super.remove();
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}
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/**
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* Extract the text from this editor.
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* @returns {string}
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*/
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#extractText() {
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const divs = this.editorDiv.getElementsByTagName("div");
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if (divs.length === 0) {
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return this.editorDiv.innerText;
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}
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const buffer = [];
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for (const div of divs) {
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buffer.push(div.innerText.replace(/\r\n?|\n/, ""));
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}
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return buffer.join("\n");
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}
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#setEditorDimensions() {
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const [parentWidth, parentHeight] = this.parentDimensions;
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let rect;
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if (this.isAttachedToDOM) {
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rect = this.div.getBoundingClientRect();
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} else {
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// This editor isn't on screen but we need to get its dimensions, so
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// we just insert it in the DOM, get its bounding box and then remove it.
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const { currentLayer, div } = this;
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const savedDisplay = div.style.display;
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div.style.display = "hidden";
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currentLayer.div.append(this.div);
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rect = div.getBoundingClientRect();
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div.remove();
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div.style.display = savedDisplay;
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}
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// The dimensions are relative to the rotation of the page, hence we need to
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// take that into account (see issue #16636).
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if (this.rotation % 180 === this.parentRotation % 180) {
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this.width = rect.width / parentWidth;
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this.height = rect.height / parentHeight;
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} else {
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this.width = rect.height / parentWidth;
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this.height = rect.width / parentHeight;
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}
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this.fixAndSetPosition();
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}
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/**
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* Commit the content we have in this editor.
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* @returns {undefined}
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*/
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commit() {
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if (!this.isInEditMode()) {
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return;
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}
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super.commit();
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this.disableEditMode();
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const savedText = this.#content;
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const newText = (this.#content = this.#extractText().trimEnd());
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if (savedText === newText) {
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return;
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}
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const setText = text => {
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this.#content = text;
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if (!text) {
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this.remove();
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return;
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}
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this.#setContent();
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this.rebuild();
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this.#setEditorDimensions();
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};
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this.addCommands({
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cmd: () => {
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setText(newText);
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},
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undo: () => {
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setText(savedText);
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},
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mustExec: false,
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});
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this.#setEditorDimensions();
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}
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/** @inheritdoc */
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shouldGetKeyboardEvents() {
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return this.isInEditMode();
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}
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/** @inheritdoc */
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enterInEditMode() {
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this.enableEditMode();
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this.editorDiv.focus();
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}
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/**
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* ondblclick callback.
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* @param {MouseEvent} event
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*/
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dblclick(event) {
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this.enterInEditMode();
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}
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/**
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* onkeydown callback.
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* @param {KeyboardEvent} event
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*/
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keydown(event) {
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if (event.target === this.div && event.key === "Enter") {
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this.enterInEditMode();
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}
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}
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editorDivKeydown(event) {
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FreeTextEditor._keyboardManager.exec(this, event);
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}
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editorDivFocus(event) {
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this.isEditing = true;
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}
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editorDivBlur(event) {
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this.isEditing = false;
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}
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editorDivInput(event) {
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this.parent.div.classList.toggle("freeTextEditing", this.isEmpty());
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}
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/** @inheritdoc */
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disableEditing() {
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this.editorDiv.setAttribute("role", "comment");
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this.editorDiv.removeAttribute("aria-multiline");
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}
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/** @inheritdoc */
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enableEditing() {
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this.editorDiv.setAttribute("role", "textbox");
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this.editorDiv.setAttribute("aria-multiline", true);
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}
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/** @inheritdoc */
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render() {
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if (this.div) {
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return this.div;
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}
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let baseX, baseY;
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if (this.width) {
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baseX = this.x;
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baseY = this.y;
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}
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super.render();
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this.editorDiv = document.createElement("div");
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this.editorDiv.className = "internal";
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this.editorDiv.setAttribute("id", this.#editorDivId);
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this.enableEditing();
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FreeTextEditor._l10nPromise
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.get("editor_free_text2_aria_label")
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.then(msg => this.editorDiv?.setAttribute("aria-label", msg));
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FreeTextEditor._l10nPromise
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.get("free_text2_default_content")
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.then(msg => this.editorDiv?.setAttribute("default-content", msg));
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this.editorDiv.contentEditable = true;
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const { style } = this.editorDiv;
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style.fontSize = `calc(${this.#fontSize}px * var(--scale-factor))`;
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style.color = this.#color;
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this.div.append(this.editorDiv);
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this.overlayDiv = document.createElement("div");
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this.overlayDiv.classList.add("overlay", "enabled");
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this.div.append(this.overlayDiv);
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// TODO: implement paste callback.
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// The goal is to sanitize and have something suitable for this
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// editor.
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bindEvents(this, this.div, ["dblclick", "keydown"]);
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if (this.width) {
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// This editor was created in using copy (ctrl+c).
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const [parentWidth, parentHeight] = this.parentDimensions;
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if (this.annotationElementId) {
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// This stuff is hard to test: if something is changed here, please
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// test with the following PDF file:
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// - freetexts.pdf
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// - rotated_freetexts.pdf
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// Only small variations between the original annotation and its editor
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// are allowed.
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// position is the position of the first glyph in the annotation
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// and it's relative to its container.
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const { position } = this.#initialData;
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let [tx, ty] = this.getInitialTranslation();
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[tx, ty] = this.pageTranslationToScreen(tx, ty);
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const [pageWidth, pageHeight] = this.pageDimensions;
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const [pageX, pageY] = this.pageTranslation;
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let posX, posY;
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switch (this.rotation) {
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case 0:
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posX = baseX + (position[0] - pageX) / pageWidth;
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posY = baseY + this.height - (position[1] - pageY) / pageHeight;
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break;
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case 90:
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posX = baseX + (position[0] - pageX) / pageWidth;
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posY = baseY - (position[1] - pageY) / pageHeight;
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[tx, ty] = [ty, -tx];
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break;
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case 180:
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posX = baseX - this.width + (position[0] - pageX) / pageWidth;
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posY = baseY - (position[1] - pageY) / pageHeight;
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[tx, ty] = [-tx, -ty];
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break;
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case 270:
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posX =
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baseX +
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(position[0] - pageX - this.height * pageHeight) / pageWidth;
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posY =
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baseY +
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(position[1] - pageY - this.width * pageWidth) / pageHeight;
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[tx, ty] = [-ty, tx];
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break;
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}
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this.setAt(posX * parentWidth, posY * parentHeight, tx, ty);
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} else {
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this.setAt(
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baseX * parentWidth,
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baseY * parentHeight,
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this.width * parentWidth,
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this.height * parentHeight
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);
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}
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this.#setContent();
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this.div.draggable = true;
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this.editorDiv.contentEditable = false;
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} else {
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this.div.draggable = false;
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this.editorDiv.contentEditable = true;
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}
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if (typeof PDFJSDev !== "undefined" && PDFJSDev.test("TESTING")) {
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this.div.setAttribute("annotation-id", this.annotationElementId);
|
|
}
|
|
|
|
return this.div;
|
|
}
|
|
|
|
#setContent() {
|
|
this.editorDiv.replaceChildren();
|
|
if (!this.#content) {
|
|
return;
|
|
}
|
|
for (const line of this.#content.split("\n")) {
|
|
const div = document.createElement("div");
|
|
div.append(
|
|
line ? document.createTextNode(line) : document.createElement("br")
|
|
);
|
|
this.editorDiv.append(div);
|
|
}
|
|
}
|
|
|
|
get contentDiv() {
|
|
return this.editorDiv;
|
|
}
|
|
|
|
/** @inheritdoc */
|
|
static deserialize(data, parent, uiManager) {
|
|
let initialData = null;
|
|
if (data instanceof FreeTextAnnotationElement) {
|
|
const {
|
|
data: {
|
|
defaultAppearanceData: { fontSize, fontColor },
|
|
rect,
|
|
rotation,
|
|
id,
|
|
},
|
|
textContent,
|
|
textPosition,
|
|
parent: {
|
|
page: { pageNumber },
|
|
},
|
|
} = data;
|
|
// textContent is supposed to be an array of strings containing each line
|
|
// of text. However, it can be null or empty.
|
|
if (!textContent || textContent.length === 0) {
|
|
// Empty annotation.
|
|
return null;
|
|
}
|
|
initialData = data = {
|
|
annotationType: AnnotationEditorType.FREETEXT,
|
|
color: Array.from(fontColor),
|
|
fontSize,
|
|
value: textContent.join("\n"),
|
|
position: textPosition,
|
|
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;
|
|
}
|
|
|
|
/** @inheritdoc */
|
|
serialize(isForCopying = false) {
|
|
if (this.isEmpty()) {
|
|
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
|
|
);
|
|
|
|
const serialized = {
|
|
annotationType: AnnotationEditorType.FREETEXT,
|
|
color,
|
|
fontSize: this.#fontSize,
|
|
value: this.#content,
|
|
pageIndex: this.pageIndex,
|
|
rect,
|
|
rotation: this.rotation,
|
|
};
|
|
|
|
if (isForCopying) {
|
|
// Don't add the id when copying because the pasted editor mustn't be
|
|
// linked to an existing annotation.
|
|
return serialized;
|
|
}
|
|
|
|
if (this.annotationElementId && !this.#hasElementChanged(serialized)) {
|
|
return null;
|
|
}
|
|
|
|
serialized.id = this.annotationElementId;
|
|
|
|
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);
|
|
}
|
|
}
|
|
|
|
export { FreeTextEditor };
|