pdfjs-dist/lib/core/xfa/factory.js

Generic build of Mozilla's PDF.js library.

/**
 * @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.XFAFactory = void 0;
var _xfa_object = require("./xfa_object.js");
var _bind = require("./bind.js");
var _data = require("./data.js");
var _fonts = require("./fonts.js");
var _utils = require("./utils.js");
var _util = require("../../shared/util.js");
var _parser = require("./parser.js");
var _xhtml = require("./xhtml.js");
class XFAFactory {
  constructor(data) {
    try {
      this.root = new _parser.XFAParser().parse(XFAFactory._createDocument(data));
      const binder = new _bind.Binder(this.root);
      this.form = binder.bind();
      this.dataHandler = new _data.DataHandler(this.root, binder.getData());
      this.form[_xfa_object.$globalData].template = this.form;
    } catch (e) {
      (0, _util.warn)(`XFA - an error occurred during parsing and binding: ${e}`);
    }
  }
  isValid() {
    return this.root && this.form;
  }
  _createPagesHelper() {
    const iterator = this.form[_xfa_object.$toPages]();
    return new Promise((resolve, reject) => {
      const nextIteration = () => {
        try {
          const value = iterator.next();
          if (value.done) {
            resolve(value.value);
          } else {
            setTimeout(nextIteration, 0);
          }
        } catch (e) {
          reject(e);
        }
      };
      setTimeout(nextIteration, 0);
    });
  }
  async _createPages() {
    try {
      this.pages = await this._createPagesHelper();
      this.dims = this.pages.children.map(c => {
        const {
          width,
          height
        } = c.attributes.style;
        return [0, 0, parseInt(width), parseInt(height)];
      });
    } catch (e) {
      (0, _util.warn)(`XFA - an error occurred during layout: ${e}`);
    }
  }
  getBoundingBox(pageIndex) {
    return this.dims[pageIndex];
  }
  async getNumPages() {
    if (!this.pages) {
      await this._createPages();
    }
    return this.dims.length;
  }
  setImages(images) {
    this.form[_xfa_object.$globalData].images = images;
  }
  setFonts(fonts) {
    this.form[_xfa_object.$globalData].fontFinder = new _fonts.FontFinder(fonts);
    const missingFonts = [];
    for (let typeface of this.form[_xfa_object.$globalData].usedTypefaces) {
      typeface = (0, _utils.stripQuotes)(typeface);
      const font = this.form[_xfa_object.$globalData].fontFinder.find(typeface);
      if (!font) {
        missingFonts.push(typeface);
      }
    }
    if (missingFonts.length > 0) {
      return missingFonts;
    }
    return null;
  }
  appendFonts(fonts, reallyMissingFonts) {
    this.form[_xfa_object.$globalData].fontFinder.add(fonts, reallyMissingFonts);
  }
  async getPages() {
    if (!this.pages) {
      await this._createPages();
    }
    const pages = this.pages;
    this.pages = null;
    return pages;
  }
  serializeData(storage) {
    return this.dataHandler.serialize(storage);
  }
  static _createDocument(data) {
    if (!data["/xdp:xdp"]) {
      return data["xdp:xdp"];
    }
    return Object.values(data).join("");
  }
  static getRichTextAsHtml(rc) {
    if (!rc || typeof rc !== "string") {
      return null;
    }
    try {
      let root = new _parser.XFAParser(_xhtml.XhtmlNamespace, true).parse(rc);
      if (!["body", "xhtml"].includes(root[_xfa_object.$nodeName])) {
        const newRoot = _xhtml.XhtmlNamespace.body({});
        newRoot[_xfa_object.$appendChild](root);
        root = newRoot;
      }
      const result = root[_xfa_object.$toHTML]();
      if (!result.success) {
        return null;
      }
      const {
        html
      } = result;
      const {
        attributes
      } = html;
      if (attributes) {
        if (attributes.class) {
          attributes.class = attributes.class.filter(attr => !attr.startsWith("xfa"));
        }
        attributes.dir = "auto";
      }
      return {
        html,
        str: root[_xfa_object.$text]()
      };
    } catch (e) {
      (0, _util.warn)(`XFA - an error occurred during parsing of rich text: ${e}`);
    }
    return null;
  }
}
exports.XFAFactory = XFAFactory;