pdfjs-dist/lib/display/annotation_storage.js

/**
 * @licstart The following is the entire license notice for the
 * JavaScript code in this page
 *
 * Copyright 2022 Mozilla Foundation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * @licend The above is the entire license notice for the
 * JavaScript code in this page
 */
"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.PrintAnnotationStorage = exports.AnnotationStorage = void 0;
var _util = require("../shared/util.js");
var _editor = require("./editor/editor.js");
var _murmurhash = require("../shared/murmurhash3.js");
class AnnotationStorage {
  #modified = false;
  #storage = new Map();
  constructor() {
    this.onSetModified = null;
    this.onResetModified = null;
    this.onAnnotationEditor = null;
  }
  getValue(key, defaultValue) {
    const value = this.#storage.get(key);
    if (value === undefined) {
      return defaultValue;
    }
    return Object.assign(defaultValue, value);
  }
  getRawValue(key) {
    return this.#storage.get(key);
  }
  remove(key) {
    this.#storage.delete(key);
    if (this.#storage.size === 0) {
      this.resetModified();
    }
    if (typeof this.onAnnotationEditor === "function") {
      for (const value of this.#storage.values()) {
        if (value instanceof _editor.AnnotationEditor) {
          return;
        }
      }
      this.onAnnotationEditor(null);
    }
  }
  setValue(key, value) {
    const obj = this.#storage.get(key);
    let modified = false;
    if (obj !== undefined) {
      for (const [entry, val] of Object.entries(value)) {
        if (obj[entry] !== val) {
          modified = true;
          obj[entry] = val;
        }
      }
    } else {
      modified = true;
      this.#storage.set(key, value);
    }
    if (modified) {
      this.#setModified();
    }
    if (value instanceof _editor.AnnotationEditor && typeof this.onAnnotationEditor === "function") {
      this.onAnnotationEditor(value.constructor._type);
    }
  }
  has(key) {
    return this.#storage.has(key);
  }
  getAll() {
    return this.#storage.size > 0 ? (0, _util.objectFromMap)(this.#storage) : null;
  }
  get size() {
    return this.#storage.size;
  }
  #setModified() {
    if (!this.#modified) {
      this.#modified = true;
      if (typeof this.onSetModified === "function") {
        this.onSetModified();
      }
    }
  }
  resetModified() {
    if (this.#modified) {
      this.#modified = false;
      if (typeof this.onResetModified === "function") {
        this.onResetModified();
      }
    }
  }
  get print() {
    return new PrintAnnotationStorage(this);
  }
  get serializable() {
    if (this.#storage.size === 0) {
      return null;
    }
    const clone = new Map();
    for (const [key, val] of this.#storage) {
      const serialized = val instanceof _editor.AnnotationEditor ? val.serialize() : val;
      if (serialized) {
        clone.set(key, serialized);
      }
    }
    return clone;
  }
  static getHash(map) {
    if (!map) {
      return "";
    }
    const hash = new _murmurhash.MurmurHash3_64();
    for (const [key, val] of map) {
      hash.update(`${key}:${JSON.stringify(val)}`);
    }
    return hash.hexdigest();
  }
}
exports.AnnotationStorage = AnnotationStorage;
class PrintAnnotationStorage extends AnnotationStorage {
  #serializable = null;
  constructor(parent) {
    super();
    this.#serializable = structuredClone(parent.serializable);
  }
  get print() {
    (0, _util.unreachable)("Should not call PrintAnnotationStorage.print");
  }
  get serializable() {
    return this.#serializable;
  }
}
exports.PrintAnnotationStorage = PrintAnnotationStorage;