755c6edc5e
This should, hopefully, cover all the possible ways[1] in which "fake workers" are loaded. Given the different code-paths, adding unit-tests might not be that simple. Note that in order to make this work, the various `fakeWorkerFilesLoader` functions were converted to return `Promises`. --- [1] Unfortunately there's lots of them, for various build targets and configurations.
2543 lines
83 KiB
JavaScript
2543 lines
83 KiB
JavaScript
/* Copyright 2012 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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/* globals requirejs, __non_webpack_require__ */
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import {
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assert, createPromiseCapability, getVerbosityLevel, info, InvalidPDFException,
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isArrayBuffer, isSameOrigin, MissingPDFException, NativeImageDecoding,
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PasswordException, setVerbosityLevel, shadow, stringToBytes,
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UnexpectedResponseException, UnknownErrorException, unreachable, URL, warn
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} from '../shared/util';
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import {
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DOMCanvasFactory, DOMCMapReaderFactory, DummyStatTimer, loadScript,
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PageViewport, RenderingCancelledException, StatTimer
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} from './dom_utils';
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import { FontFaceObject, FontLoader } from './font_loader';
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import { apiCompatibilityParams } from './api_compatibility';
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import { CanvasGraphics } from './canvas';
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import globalScope from '../shared/global_scope';
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import { GlobalWorkerOptions } from './worker_options';
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import { MessageHandler } from '../shared/message_handler';
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import { Metadata } from './metadata';
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import { PDFDataTransportStream } from './transport_stream';
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import { WebGLContext } from './webgl';
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var DEFAULT_RANGE_CHUNK_SIZE = 65536; // 2^16 = 65536
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let isWorkerDisabled = false;
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let workerSrc;
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const pdfjsFilePath =
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typeof PDFJSDev !== 'undefined' &&
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PDFJSDev.test('PRODUCTION && !(MOZCENTRAL || FIREFOX)') &&
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typeof document !== 'undefined' && document.currentScript ?
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document.currentScript.src : null;
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let fakeWorkerFilesLoader = null;
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if (typeof PDFJSDev !== 'undefined' && PDFJSDev.test('GENERIC')) {
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let useRequireEnsure = false;
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// For GENERIC build we need to add support for different fake file loaders
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// for different frameworks.
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if (typeof window === 'undefined') {
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// node.js - disable worker and set require.ensure.
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isWorkerDisabled = true;
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if (typeof __non_webpack_require__.ensure === 'undefined') {
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__non_webpack_require__.ensure = __non_webpack_require__('node-ensure');
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}
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useRequireEnsure = true;
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} else if (typeof __non_webpack_require__ !== 'undefined' &&
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typeof __non_webpack_require__.ensure === 'function') {
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useRequireEnsure = true;
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}
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if (typeof requirejs !== 'undefined' && requirejs.toUrl) {
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workerSrc = requirejs.toUrl('pdfjs-dist/build/pdf.worker.js');
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}
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const dynamicLoaderSupported =
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typeof requirejs !== 'undefined' && requirejs.load;
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fakeWorkerFilesLoader = useRequireEnsure ? (function() {
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return new Promise(function(resolve, reject) {
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__non_webpack_require__.ensure([], function() {
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try {
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let worker;
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if (typeof PDFJSDev !== 'undefined' && PDFJSDev.test('LIB')) {
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worker = __non_webpack_require__('../pdf.worker.js');
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} else {
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worker = __non_webpack_require__('./pdf.worker.js');
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}
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resolve(worker.WorkerMessageHandler);
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} catch (ex) {
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reject(ex);
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}
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}, reject, 'pdfjsWorker');
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});
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}) : dynamicLoaderSupported ? (function() {
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return new Promise(function(resolve, reject) {
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requirejs(['pdfjs-dist/build/pdf.worker'], function(worker) {
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try {
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resolve(worker.WorkerMessageHandler);
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} catch (ex) {
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reject(ex);
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}
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}, reject);
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});
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}) : null;
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}
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/**
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* @typedef {function} IPDFStreamFactory
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* @param {DocumentInitParameters} params The document initialization
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* parameters. The "url" key is always present.
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* @return {IPDFStream}
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*/
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/** @type IPDFStreamFactory */
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var createPDFNetworkStream;
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/**
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* Sets the function that instantiates a IPDFStream as an alternative PDF data
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* transport.
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* @param {IPDFStreamFactory} pdfNetworkStreamFactory - the factory function
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* that takes document initialization parameters (including a "url") and returns
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* an instance of IPDFStream.
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*/
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function setPDFNetworkStreamFactory(pdfNetworkStreamFactory) {
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createPDFNetworkStream = pdfNetworkStreamFactory;
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}
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/**
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* Document initialization / loading parameters object.
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*
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* @typedef {Object} DocumentInitParameters
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* @property {string} url - The URL of the PDF.
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* @property {TypedArray|Array|string} data - Binary PDF data. Use typed arrays
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* (Uint8Array) to improve the memory usage. If PDF data is BASE64-encoded,
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* use atob() to convert it to a binary string first.
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* @property {Object} httpHeaders - Basic authentication headers.
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* @property {boolean} withCredentials - Indicates whether or not cross-site
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* Access-Control requests should be made using credentials such as cookies
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* or authorization headers. The default is false.
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* @property {string} password - For decrypting password-protected PDFs.
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* @property {TypedArray} initialData - A typed array with the first portion or
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* all of the pdf data. Used by the extension since some data is already
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* loaded before the switch to range requests.
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* @property {number} length - The PDF file length. It's used for progress
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* reports and range requests operations.
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* @property {PDFDataRangeTransport} range
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* @property {number} rangeChunkSize - Optional parameter to specify
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* maximum number of bytes fetched per range request. The default value is
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* 2^16 = 65536.
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* @property {PDFWorker} worker - (optional) The worker that will be used for
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* the loading and parsing of the PDF data.
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* @property {boolean} postMessageTransfers - (optional) Enables transfer usage
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* in postMessage for ArrayBuffers. The default value is `true`.
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* @property {number} verbosity - (optional) Controls the logging level; the
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* constants from {VerbosityLevel} should be used.
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* @property {string} docBaseUrl - (optional) The base URL of the document,
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* used when attempting to recover valid absolute URLs for annotations, and
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* outline items, that (incorrectly) only specify relative URLs.
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* @property {string} nativeImageDecoderSupport - (optional) Strategy for
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* decoding certain (simple) JPEG images in the browser. This is useful for
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* environments without DOM image and canvas support, such as e.g. Node.js.
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* Valid values are 'decode', 'display' or 'none'; where 'decode' is intended
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* for browsers with full image/canvas support, 'display' for environments
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* with limited image support through stubs (useful for SVG conversion),
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* and 'none' where JPEG images will be decoded entirely by PDF.js.
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* The default value is 'decode'.
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* @property {string} cMapUrl - (optional) The URL where the predefined
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* Adobe CMaps are located. Include trailing slash.
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* @property {boolean} cMapPacked - (optional) Specifies if the Adobe CMaps are
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* binary packed.
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* @property {Object} CMapReaderFactory - (optional) The factory that will be
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* used when reading built-in CMap files. Providing a custom factory is useful
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* for environments without `XMLHttpRequest` support, such as e.g. Node.js.
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* The default value is {DOMCMapReaderFactory}.
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* @property {boolean} stopAtErrors - (optional) Reject certain promises, e.g.
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* `getOperatorList`, `getTextContent`, and `RenderTask`, when the associated
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* PDF data cannot be successfully parsed, instead of attempting to recover
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* whatever possible of the data. The default value is `false`.
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* @property {number} maxImageSize - (optional) The maximum allowed image size
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* in total pixels, i.e. width * height. Images above this value will not be
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* rendered. Use -1 for no limit, which is also the default value.
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* @property {boolean} isEvalSupported - (optional) Determines if we can eval
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* strings as JS. Primarily used to improve performance of font rendering,
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* and when parsing PDF functions. The default value is `true`.
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* @property {boolean} disableFontFace - (optional) By default fonts are
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* converted to OpenType fonts and loaded via font face rules. If disabled,
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* fonts will be rendered using a built-in font renderer that constructs the
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* glyphs with primitive path commands. The default value is `false`.
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* @property {boolean} disableRange - (optional) Disable range request loading
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* of PDF files. When enabled, and if the server supports partial content
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* requests, then the PDF will be fetched in chunks.
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* The default value is `false`.
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* @property {boolean} disableStream - (optional) Disable streaming of PDF file
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* data. By default PDF.js attempts to load PDFs in chunks.
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* The default value is `false`.
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* @property {boolean} disableAutoFetch - (optional) Disable pre-fetching of PDF
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* file data. When range requests are enabled PDF.js will automatically keep
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* fetching more data even if it isn't needed to display the current page.
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* The default value is `false`.
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* NOTE: It is also necessary to disable streaming, see above,
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* in order for disabling of pre-fetching to work correctly.
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* @property {boolean} disableCreateObjectURL - (optional) Disable the use of
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* `URL.createObjectURL`, for compatibility with older browsers.
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* The default value is `false`.
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* @property {boolean} pdfBug - (optional) Enables special hooks for debugging
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* PDF.js (see `web/debugger.js`). The default value is `false`.
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*/
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/**
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* @typedef {Object} PDFDocumentStats
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* @property {Array} streamTypes - Used stream types in the document (an item
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* is set to true if specific stream ID was used in the document).
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* @property {Array} fontTypes - Used font type in the document (an item is set
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* to true if specific font ID was used in the document).
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*/
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/**
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* This is the main entry point for loading a PDF and interacting with it.
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* NOTE: If a URL is used to fetch the PDF data a standard XMLHttpRequest(XHR)
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* is used, which means it must follow the same origin rules that any XHR does
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* e.g. No cross domain requests without CORS.
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*
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* @param {string|TypedArray|DocumentInitParameters|PDFDataRangeTransport} src
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* Can be a url to where a PDF is located, a typed array (Uint8Array)
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* already populated with data or parameter object.
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*
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* @return {PDFDocumentLoadingTask}
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*/
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function getDocument(src) {
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var task = new PDFDocumentLoadingTask();
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var source;
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if (typeof src === 'string') {
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source = { url: src, };
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} else if (isArrayBuffer(src)) {
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source = { data: src, };
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} else if (src instanceof PDFDataRangeTransport) {
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source = { range: src, };
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} else {
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if (typeof src !== 'object') {
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throw new Error('Invalid parameter in getDocument, ' +
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'need either Uint8Array, string or a parameter object');
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}
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if (!src.url && !src.data && !src.range) {
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throw new Error(
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'Invalid parameter object: need either .data, .range or .url');
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}
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source = src;
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}
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let params = Object.create(null);
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var rangeTransport = null;
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let worker = null;
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for (var key in source) {
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if (key === 'url' && typeof window !== 'undefined') {
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// The full path is required in the 'url' field.
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params[key] = new URL(source[key], window.location).href;
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continue;
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} else if (key === 'range') {
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rangeTransport = source[key];
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continue;
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} else if (key === 'worker') {
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worker = source[key];
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continue;
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} else if (key === 'data' && !(source[key] instanceof Uint8Array)) {
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// Converting string or array-like data to Uint8Array.
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var pdfBytes = source[key];
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if (typeof pdfBytes === 'string') {
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params[key] = stringToBytes(pdfBytes);
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} else if (typeof pdfBytes === 'object' && pdfBytes !== null &&
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!isNaN(pdfBytes.length)) {
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params[key] = new Uint8Array(pdfBytes);
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} else if (isArrayBuffer(pdfBytes)) {
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params[key] = new Uint8Array(pdfBytes);
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} else {
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throw new Error('Invalid PDF binary data: either typed array, ' +
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'string or array-like object is expected in the ' +
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'data property.');
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}
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continue;
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}
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params[key] = source[key];
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}
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params.rangeChunkSize = params.rangeChunkSize || DEFAULT_RANGE_CHUNK_SIZE;
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params.CMapReaderFactory = params.CMapReaderFactory || DOMCMapReaderFactory;
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params.ignoreErrors = params.stopAtErrors !== true;
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params.pdfBug = params.pdfBug === true;
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const NativeImageDecoderValues = Object.values(NativeImageDecoding);
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if (params.nativeImageDecoderSupport === undefined ||
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!NativeImageDecoderValues.includes(params.nativeImageDecoderSupport)) {
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params.nativeImageDecoderSupport =
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(apiCompatibilityParams.nativeImageDecoderSupport ||
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NativeImageDecoding.DECODE);
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}
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if (!Number.isInteger(params.maxImageSize)) {
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params.maxImageSize = -1;
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}
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if (typeof params.isEvalSupported !== 'boolean') {
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params.isEvalSupported = true;
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}
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if (typeof params.disableFontFace !== 'boolean') {
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params.disableFontFace = apiCompatibilityParams.disableFontFace || false;
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}
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if (typeof params.disableRange !== 'boolean') {
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params.disableRange = false;
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}
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if (typeof params.disableStream !== 'boolean') {
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params.disableStream = false;
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}
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if (typeof params.disableAutoFetch !== 'boolean') {
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params.disableAutoFetch = false;
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}
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if (typeof params.disableCreateObjectURL !== 'boolean') {
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params.disableCreateObjectURL =
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apiCompatibilityParams.disableCreateObjectURL || false;
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}
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// Set the main-thread verbosity level.
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setVerbosityLevel(params.verbosity);
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if (!worker) {
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const workerParams = {
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postMessageTransfers: params.postMessageTransfers,
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verbosity: params.verbosity,
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};
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// Worker was not provided -- creating and owning our own. If message port
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// is specified in global worker options, using it.
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let workerPort = GlobalWorkerOptions.workerPort;
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if (workerPort) {
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workerParams.port = workerPort;
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worker = PDFWorker.fromPort(workerParams);
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} else {
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worker = new PDFWorker(workerParams);
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}
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task._worker = worker;
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}
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var docId = task.docId;
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worker.promise.then(function () {
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if (task.destroyed) {
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throw new Error('Loading aborted');
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}
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return _fetchDocument(worker, params, rangeTransport, docId).then(
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function (workerId) {
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if (task.destroyed) {
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throw new Error('Loading aborted');
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}
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let networkStream;
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if (rangeTransport) {
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networkStream = new PDFDataTransportStream({
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length: params.length,
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initialData: params.initialData,
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disableRange: params.disableRange,
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disableStream: params.disableStream,
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}, rangeTransport);
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} else if (!params.data) {
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networkStream = createPDFNetworkStream({
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url: params.url,
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length: params.length,
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httpHeaders: params.httpHeaders,
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withCredentials: params.withCredentials,
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rangeChunkSize: params.rangeChunkSize,
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disableRange: params.disableRange,
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disableStream: params.disableStream,
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});
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}
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var messageHandler = new MessageHandler(docId, workerId, worker.port);
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messageHandler.postMessageTransfers = worker.postMessageTransfers;
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var transport = new WorkerTransport(messageHandler, task, networkStream,
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params);
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task._transport = transport;
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messageHandler.send('Ready', null);
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});
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}).catch(task._capability.reject);
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return task;
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}
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/**
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* Starts fetching of specified PDF document/data.
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* @param {PDFWorker} worker
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* @param {Object} source
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* @param {PDFDataRangeTransport} pdfDataRangeTransport
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* @param {string} docId Unique document id, used as MessageHandler id.
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* @returns {Promise} The promise, which is resolved when worker id of
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* MessageHandler is known.
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* @private
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*/
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function _fetchDocument(worker, source, pdfDataRangeTransport, docId) {
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if (worker.destroyed) {
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return Promise.reject(new Error('Worker was destroyed'));
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}
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if (pdfDataRangeTransport) {
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source.length = pdfDataRangeTransport.length;
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source.initialData = pdfDataRangeTransport.initialData;
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}
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return worker.messageHandler.sendWithPromise('GetDocRequest', {
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docId,
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apiVersion: (typeof PDFJSDev !== 'undefined' ?
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PDFJSDev.eval('BUNDLE_VERSION') : null),
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source: { // Only send the required properties, and *not* the entire object.
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data: source.data,
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url: source.url,
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password: source.password,
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disableAutoFetch: source.disableAutoFetch,
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rangeChunkSize: source.rangeChunkSize,
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length: source.length,
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},
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maxImageSize: source.maxImageSize,
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disableFontFace: source.disableFontFace,
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disableCreateObjectURL: source.disableCreateObjectURL,
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postMessageTransfers: worker.postMessageTransfers,
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docBaseUrl: source.docBaseUrl,
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nativeImageDecoderSupport: source.nativeImageDecoderSupport,
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ignoreErrors: source.ignoreErrors,
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isEvalSupported: source.isEvalSupported,
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}).then(function (workerId) {
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if (worker.destroyed) {
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throw new Error('Worker was destroyed');
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}
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return workerId;
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});
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}
|
|
|
|
/**
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* PDF document loading operation.
|
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* @class
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* @alias PDFDocumentLoadingTask
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*/
|
|
var PDFDocumentLoadingTask = (function PDFDocumentLoadingTaskClosure() {
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var nextDocumentId = 0;
|
|
|
|
/** @constructs PDFDocumentLoadingTask */
|
|
function PDFDocumentLoadingTask() {
|
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this._capability = createPromiseCapability();
|
|
this._transport = null;
|
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this._worker = null;
|
|
|
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/**
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|
* Unique document loading task id -- used in MessageHandlers.
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* @type {string}
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*/
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this.docId = 'd' + (nextDocumentId++);
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/**
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* Shows if loading task is destroyed.
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* @type {boolean}
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*/
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this.destroyed = false;
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|
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/**
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* Callback to request a password if wrong or no password was provided.
|
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* The callback receives two parameters: function that needs to be called
|
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* with new password and reason (see {PasswordResponses}).
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*/
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this.onPassword = null;
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|
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/**
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|
* Callback to be able to monitor the loading progress of the PDF file
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|
* (necessary to implement e.g. a loading bar). The callback receives
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* an {Object} with the properties: {number} loaded and {number} total.
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*/
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this.onProgress = null;
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|
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/**
|
|
* Callback to when unsupported feature is used. The callback receives
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* an {UNSUPPORTED_FEATURES} argument.
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*/
|
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this.onUnsupportedFeature = null;
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}
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|
|
|
PDFDocumentLoadingTask.prototype =
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/** @lends PDFDocumentLoadingTask.prototype */ {
|
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/**
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* @return {Promise}
|
|
*/
|
|
get promise() {
|
|
return this._capability.promise;
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|
},
|
|
|
|
/**
|
|
* Aborts all network requests and destroys worker.
|
|
* @return {Promise} A promise that is resolved after destruction activity
|
|
* is completed.
|
|
*/
|
|
destroy() {
|
|
this.destroyed = true;
|
|
|
|
var transportDestroyed = !this._transport ? Promise.resolve() :
|
|
this._transport.destroy();
|
|
return transportDestroyed.then(() => {
|
|
this._transport = null;
|
|
if (this._worker) {
|
|
this._worker.destroy();
|
|
this._worker = null;
|
|
}
|
|
});
|
|
},
|
|
|
|
/**
|
|
* Registers callbacks to indicate the document loading completion.
|
|
*
|
|
* @param {function} onFulfilled The callback for the loading completion.
|
|
* @param {function} onRejected The callback for the loading failure.
|
|
* @return {Promise} A promise that is resolved after the onFulfilled or
|
|
* onRejected callback.
|
|
*/
|
|
then: function PDFDocumentLoadingTask_then(onFulfilled, onRejected) {
|
|
return this.promise.then.apply(this.promise, arguments);
|
|
},
|
|
};
|
|
|
|
return PDFDocumentLoadingTask;
|
|
})();
|
|
|
|
/**
|
|
* Abstract class to support range requests file loading.
|
|
* @class
|
|
* @alias PDFDataRangeTransport
|
|
* @param {number} length
|
|
* @param {Uint8Array} initialData
|
|
*/
|
|
var PDFDataRangeTransport = (function pdfDataRangeTransportClosure() {
|
|
function PDFDataRangeTransport(length, initialData) {
|
|
this.length = length;
|
|
this.initialData = initialData;
|
|
|
|
this._rangeListeners = [];
|
|
this._progressListeners = [];
|
|
this._progressiveReadListeners = [];
|
|
this._readyCapability = createPromiseCapability();
|
|
}
|
|
PDFDataRangeTransport.prototype =
|
|
/** @lends PDFDataRangeTransport.prototype */ {
|
|
addRangeListener:
|
|
function PDFDataRangeTransport_addRangeListener(listener) {
|
|
this._rangeListeners.push(listener);
|
|
},
|
|
|
|
addProgressListener:
|
|
function PDFDataRangeTransport_addProgressListener(listener) {
|
|
this._progressListeners.push(listener);
|
|
},
|
|
|
|
addProgressiveReadListener:
|
|
function PDFDataRangeTransport_addProgressiveReadListener(listener) {
|
|
this._progressiveReadListeners.push(listener);
|
|
},
|
|
|
|
onDataRange: function PDFDataRangeTransport_onDataRange(begin, chunk) {
|
|
var listeners = this._rangeListeners;
|
|
for (var i = 0, n = listeners.length; i < n; ++i) {
|
|
listeners[i](begin, chunk);
|
|
}
|
|
},
|
|
|
|
onDataProgress: function PDFDataRangeTransport_onDataProgress(loaded) {
|
|
this._readyCapability.promise.then(() => {
|
|
var listeners = this._progressListeners;
|
|
for (var i = 0, n = listeners.length; i < n; ++i) {
|
|
listeners[i](loaded);
|
|
}
|
|
});
|
|
},
|
|
|
|
onDataProgressiveRead:
|
|
function PDFDataRangeTransport_onDataProgress(chunk) {
|
|
this._readyCapability.promise.then(() => {
|
|
var listeners = this._progressiveReadListeners;
|
|
for (var i = 0, n = listeners.length; i < n; ++i) {
|
|
listeners[i](chunk);
|
|
}
|
|
});
|
|
},
|
|
|
|
transportReady: function PDFDataRangeTransport_transportReady() {
|
|
this._readyCapability.resolve();
|
|
},
|
|
|
|
requestDataRange:
|
|
function PDFDataRangeTransport_requestDataRange(begin, end) {
|
|
unreachable('Abstract method PDFDataRangeTransport.requestDataRange');
|
|
},
|
|
|
|
abort: function PDFDataRangeTransport_abort() {
|
|
},
|
|
};
|
|
return PDFDataRangeTransport;
|
|
})();
|
|
|
|
/**
|
|
* Proxy to a PDFDocument in the worker thread. Also, contains commonly used
|
|
* properties that can be read synchronously.
|
|
*/
|
|
class PDFDocumentProxy {
|
|
constructor(pdfInfo, transport, loadingTask) {
|
|
this.loadingTask = loadingTask;
|
|
|
|
this._pdfInfo = pdfInfo;
|
|
this._transport = transport;
|
|
}
|
|
|
|
/**
|
|
* @return {number} Total number of pages the PDF contains.
|
|
*/
|
|
get numPages() {
|
|
return this._pdfInfo.numPages;
|
|
}
|
|
|
|
/**
|
|
* @return {string} A (not guaranteed to be) unique ID to identify a PDF.
|
|
*/
|
|
get fingerprint() {
|
|
return this._pdfInfo.fingerprint;
|
|
}
|
|
|
|
/**
|
|
* @param {number} pageNumber - The page number to get. The first page is 1.
|
|
* @return {Promise} A promise that is resolved with a {@link PDFPageProxy}
|
|
* object.
|
|
*/
|
|
getPage(pageNumber) {
|
|
return this._transport.getPage(pageNumber);
|
|
}
|
|
|
|
/**
|
|
* @param {{num: number, gen: number}} ref - The page reference. Must have
|
|
* the `num` and `gen` properties.
|
|
* @return {Promise} A promise that is resolved with the page index that is
|
|
* associated with the reference.
|
|
*/
|
|
getPageIndex(ref) {
|
|
return this._transport.getPageIndex(ref);
|
|
}
|
|
|
|
/**
|
|
* @return {Promise} A promise that is resolved with a lookup table for
|
|
* mapping named destinations to reference numbers.
|
|
*
|
|
* This can be slow for large documents. Use `getDestination` instead.
|
|
*/
|
|
getDestinations() {
|
|
return this._transport.getDestinations();
|
|
}
|
|
|
|
/**
|
|
* @param {string} id - The named destination to get.
|
|
* @return {Promise} A promise that is resolved with all information
|
|
* of the given named destination.
|
|
*/
|
|
getDestination(id) {
|
|
return this._transport.getDestination(id);
|
|
}
|
|
|
|
/**
|
|
* @return {Promise} A promise that is resolved with an {Array} containing
|
|
* the page labels that correspond to the page indexes, or `null` when
|
|
* no page labels are present in the PDF file.
|
|
*/
|
|
getPageLabels() {
|
|
return this._transport.getPageLabels();
|
|
}
|
|
|
|
/**
|
|
* @return {Promise} A promise that is resolved with a {string} containing
|
|
* the page mode name.
|
|
*/
|
|
getPageMode() {
|
|
return this._transport.getPageMode();
|
|
}
|
|
|
|
/**
|
|
* @return {Promise} A promise that is resolved with a lookup table for
|
|
* mapping named attachments to their content.
|
|
*/
|
|
getAttachments() {
|
|
return this._transport.getAttachments();
|
|
}
|
|
|
|
/**
|
|
* @return {Promise} A promise that is resolved with an {Array} of all the
|
|
* JavaScript strings in the name tree, or `null` if no JavaScript exists.
|
|
*/
|
|
getJavaScript() {
|
|
return this._transport.getJavaScript();
|
|
}
|
|
|
|
/**
|
|
* @return {Promise} A promise that is resolved with an {Array} that is a
|
|
* tree outline (if it has one) of the PDF. The tree is in the format of:
|
|
* [
|
|
* {
|
|
* title: string,
|
|
* bold: boolean,
|
|
* italic: boolean,
|
|
* color: rgb Uint8ClampedArray,
|
|
* dest: dest obj,
|
|
* url: string,
|
|
* items: array of more items like this
|
|
* },
|
|
* ...
|
|
* ]
|
|
*/
|
|
getOutline() {
|
|
return this._transport.getOutline();
|
|
}
|
|
|
|
/**
|
|
* @return {Promise} A promise that is resolved with an {Array} that contains
|
|
* the permission flags for the PDF document, or `null` when
|
|
* no permissions are present in the PDF file.
|
|
*/
|
|
getPermissions() {
|
|
return this._transport.getPermissions();
|
|
}
|
|
|
|
/**
|
|
* @return {Promise} A promise that is resolved with an {Object} that has
|
|
* `info` and `metadata` properties. `info` is an {Object} filled with
|
|
* anything available in the information dictionary and similarly
|
|
* `metadata` is a {Metadata} object with information from the metadata
|
|
* section of the PDF.
|
|
*/
|
|
getMetadata() {
|
|
return this._transport.getMetadata();
|
|
}
|
|
|
|
/**
|
|
* @return {Promise} A promise that is resolved with a {TypedArray} that has
|
|
* the raw data from the PDF.
|
|
*/
|
|
getData() {
|
|
return this._transport.getData();
|
|
}
|
|
|
|
/**
|
|
* @return {Promise} A promise that is resolved when the document's data
|
|
* is loaded. It is resolved with an {Object} that contains the `length`
|
|
* property that indicates size of the PDF data in bytes.
|
|
*/
|
|
getDownloadInfo() {
|
|
return this._transport.downloadInfoCapability.promise;
|
|
}
|
|
|
|
/**
|
|
* @return {Promise} A promise this is resolved with current statistics about
|
|
* document structures (see {@link PDFDocumentStats}).
|
|
*/
|
|
getStats() {
|
|
return this._transport.getStats();
|
|
}
|
|
|
|
/**
|
|
* Cleans up resources allocated by the document, e.g. created `@font-face`.
|
|
*/
|
|
cleanup() {
|
|
this._transport.startCleanup();
|
|
}
|
|
|
|
/**
|
|
* Destroys the current document instance and terminates the worker.
|
|
*/
|
|
destroy() {
|
|
return this.loadingTask.destroy();
|
|
}
|
|
|
|
/**
|
|
* @return {Object} A subset of the current {DocumentInitParameters},
|
|
* which are either needed in the viewer and/or whose default values
|
|
* may be affected by the `apiCompatibilityParams`.
|
|
*/
|
|
get loadingParams() {
|
|
return this._transport.loadingParams;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Page getTextContent parameters.
|
|
*
|
|
* @typedef {Object} getTextContentParameters
|
|
* @property {boolean} normalizeWhitespace - replaces all occurrences of
|
|
* whitespace with standard spaces (0x20). The default value is `false`.
|
|
* @property {boolean} disableCombineTextItems - do not attempt to combine
|
|
* same line {@link TextItem}'s. The default value is `false`.
|
|
*/
|
|
|
|
/**
|
|
* Page text content.
|
|
*
|
|
* @typedef {Object} TextContent
|
|
* @property {array} items - array of {@link TextItem}
|
|
* @property {Object} styles - {@link TextStyles} objects, indexed by font name.
|
|
*/
|
|
|
|
/**
|
|
* Page text content part.
|
|
*
|
|
* @typedef {Object} TextItem
|
|
* @property {string} str - text content.
|
|
* @property {string} dir - text direction: 'ttb', 'ltr' or 'rtl'.
|
|
* @property {array} transform - transformation matrix.
|
|
* @property {number} width - width in device space.
|
|
* @property {number} height - height in device space.
|
|
* @property {string} fontName - font name used by pdf.js for converted font.
|
|
*/
|
|
|
|
/**
|
|
* Text style.
|
|
*
|
|
* @typedef {Object} TextStyle
|
|
* @property {number} ascent - font ascent.
|
|
* @property {number} descent - font descent.
|
|
* @property {boolean} vertical - text is in vertical mode.
|
|
* @property {string} fontFamily - possible font family
|
|
*/
|
|
|
|
/**
|
|
* Page annotation parameters.
|
|
*
|
|
* @typedef {Object} GetAnnotationsParameters
|
|
* @property {string} intent - Determines the annotations that will be fetched,
|
|
* can be either 'display' (viewable annotations) or 'print'
|
|
* (printable annotations).
|
|
* If the parameter is omitted, all annotations are fetched.
|
|
*/
|
|
|
|
/**
|
|
* Page render parameters.
|
|
*
|
|
* @typedef {Object} RenderParameters
|
|
* @property {Object} canvasContext - A 2D context of a DOM Canvas object.
|
|
* @property {PageViewport} viewport - Rendering viewport obtained by
|
|
* calling of PDFPage.getViewport method.
|
|
* @property {string} intent - Rendering intent, can be 'display' or 'print'
|
|
* (default value is 'display').
|
|
* @property {boolean} enableWebGL - (optional) Enables WebGL accelerated
|
|
* rendering for some operations. The default value is `false`.
|
|
* @property {boolean} renderInteractiveForms - (optional) Whether or not
|
|
* interactive form elements are rendered in the display
|
|
* layer. If so, we do not render them on canvas as well.
|
|
* @property {Array} transform - (optional) Additional transform, applied
|
|
* just before viewport transform.
|
|
* @property {Object} imageLayer - (optional) An object that has beginLayout,
|
|
* endLayout and appendImage functions.
|
|
* @property {Object} canvasFactory - (optional) The factory that will be used
|
|
* when creating canvases. The default value is
|
|
* {DOMCanvasFactory}.
|
|
* @property {Object} background - (optional) Background to use for the canvas.
|
|
* Can use any valid canvas.fillStyle: A DOMString parsed as
|
|
* CSS <color> value, a CanvasGradient object (a linear or
|
|
* radial gradient) or a CanvasPattern object (a repetitive
|
|
* image). The default value is 'rgb(255,255,255)'.
|
|
*/
|
|
|
|
/**
|
|
* PDF page operator list.
|
|
*
|
|
* @typedef {Object} PDFOperatorList
|
|
* @property {Array} fnArray - Array containing the operator functions.
|
|
* @property {Array} argsArray - Array containing the arguments of the
|
|
* functions.
|
|
*/
|
|
|
|
/**
|
|
* Proxy to a PDFPage in the worker thread.
|
|
* @class
|
|
* @alias PDFPageProxy
|
|
*/
|
|
var PDFPageProxy = (function PDFPageProxyClosure() {
|
|
function PDFPageProxy(pageIndex, pageInfo, transport, pdfBug = false) {
|
|
this.pageIndex = pageIndex;
|
|
this._pageInfo = pageInfo;
|
|
this.transport = transport;
|
|
this._stats = (pdfBug ? new StatTimer() : DummyStatTimer);
|
|
this._pdfBug = pdfBug;
|
|
this.commonObjs = transport.commonObjs;
|
|
this.objs = new PDFObjects();
|
|
this.cleanupAfterRender = false;
|
|
this.pendingCleanup = false;
|
|
this.intentStates = Object.create(null);
|
|
this.destroyed = false;
|
|
}
|
|
PDFPageProxy.prototype = /** @lends PDFPageProxy.prototype */ {
|
|
/**
|
|
* @return {number} Page number of the page. First page is 1.
|
|
*/
|
|
get pageNumber() {
|
|
return this.pageIndex + 1;
|
|
},
|
|
/**
|
|
* @return {number} The number of degrees the page is rotated clockwise.
|
|
*/
|
|
get rotate() {
|
|
return this._pageInfo.rotate;
|
|
},
|
|
/**
|
|
* @return {Object} The reference that points to this page. It has 'num' and
|
|
* 'gen' properties.
|
|
*/
|
|
get ref() {
|
|
return this._pageInfo.ref;
|
|
},
|
|
/**
|
|
* @return {number} The default size of units in 1/72nds of an inch.
|
|
*/
|
|
get userUnit() {
|
|
return this._pageInfo.userUnit;
|
|
},
|
|
/**
|
|
* @return {Array} An array of the visible portion of the PDF page in the
|
|
* user space units - [x1, y1, x2, y2].
|
|
*/
|
|
get view() {
|
|
return this._pageInfo.view;
|
|
},
|
|
|
|
/**
|
|
* @param {number} scale The desired scale of the viewport.
|
|
* @param {number} rotate Degrees to rotate the viewport. If omitted this
|
|
* defaults to the page rotation.
|
|
* @param {boolean} dontFlip (optional) If true, axis Y will not be flipped.
|
|
* @return {PageViewport} Contains 'width' and 'height' properties
|
|
* along with transforms required for rendering.
|
|
*/
|
|
getViewport(scale, rotate = this.rotate, dontFlip = false) {
|
|
return new PageViewport({
|
|
viewBox: this.view,
|
|
scale,
|
|
rotation: rotate,
|
|
dontFlip,
|
|
});
|
|
},
|
|
/**
|
|
* @param {GetAnnotationsParameters} params - Annotation parameters.
|
|
* @return {Promise} A promise that is resolved with an {Array} of the
|
|
* annotation objects.
|
|
*/
|
|
getAnnotations: function PDFPageProxy_getAnnotations(params) {
|
|
var intent = (params && params.intent) || null;
|
|
|
|
if (!this.annotationsPromise || this.annotationsIntent !== intent) {
|
|
this.annotationsPromise = this.transport.getAnnotations(this.pageIndex,
|
|
intent);
|
|
this.annotationsIntent = intent;
|
|
}
|
|
return this.annotationsPromise;
|
|
},
|
|
/**
|
|
* Begins the process of rendering a page to the desired context.
|
|
* @param {RenderParameters} params Page render parameters.
|
|
* @return {RenderTask} An object that contains the promise, which
|
|
* is resolved when the page finishes rendering.
|
|
*/
|
|
render: function PDFPageProxy_render(params) {
|
|
let stats = this._stats;
|
|
stats.time('Overall');
|
|
|
|
// If there was a pending destroy cancel it so no cleanup happens during
|
|
// this call to render.
|
|
this.pendingCleanup = false;
|
|
|
|
var renderingIntent = (params.intent === 'print' ? 'print' : 'display');
|
|
var canvasFactory = params.canvasFactory || new DOMCanvasFactory();
|
|
let webGLContext = new WebGLContext({
|
|
enable: params.enableWebGL,
|
|
});
|
|
|
|
if (!this.intentStates[renderingIntent]) {
|
|
this.intentStates[renderingIntent] = Object.create(null);
|
|
}
|
|
var intentState = this.intentStates[renderingIntent];
|
|
|
|
// If there's no displayReadyCapability yet, then the operatorList
|
|
// was never requested before. Make the request and create the promise.
|
|
if (!intentState.displayReadyCapability) {
|
|
intentState.receivingOperatorList = true;
|
|
intentState.displayReadyCapability = createPromiseCapability();
|
|
intentState.operatorList = {
|
|
fnArray: [],
|
|
argsArray: [],
|
|
lastChunk: false,
|
|
};
|
|
|
|
stats.time('Page Request');
|
|
this.transport.messageHandler.send('RenderPageRequest', {
|
|
pageIndex: this.pageNumber - 1,
|
|
intent: renderingIntent,
|
|
renderInteractiveForms: (params.renderInteractiveForms === true),
|
|
});
|
|
}
|
|
|
|
var complete = (error) => {
|
|
var i = intentState.renderTasks.indexOf(internalRenderTask);
|
|
if (i >= 0) {
|
|
intentState.renderTasks.splice(i, 1);
|
|
}
|
|
|
|
if (this.cleanupAfterRender) {
|
|
this.pendingCleanup = true;
|
|
}
|
|
this._tryCleanup();
|
|
|
|
if (error) {
|
|
internalRenderTask.capability.reject(error);
|
|
} else {
|
|
internalRenderTask.capability.resolve();
|
|
}
|
|
stats.timeEnd('Rendering');
|
|
stats.timeEnd('Overall');
|
|
};
|
|
|
|
var internalRenderTask = new InternalRenderTask(complete, params,
|
|
this.objs,
|
|
this.commonObjs,
|
|
intentState.operatorList,
|
|
this.pageNumber,
|
|
canvasFactory,
|
|
webGLContext,
|
|
this._pdfBug);
|
|
internalRenderTask.useRequestAnimationFrame = renderingIntent !== 'print';
|
|
if (!intentState.renderTasks) {
|
|
intentState.renderTasks = [];
|
|
}
|
|
intentState.renderTasks.push(internalRenderTask);
|
|
var renderTask = internalRenderTask.task;
|
|
|
|
intentState.displayReadyCapability.promise.then((transparency) => {
|
|
if (this.pendingCleanup) {
|
|
complete();
|
|
return;
|
|
}
|
|
stats.time('Rendering');
|
|
internalRenderTask.initializeGraphics(transparency);
|
|
internalRenderTask.operatorListChanged();
|
|
}).catch(complete);
|
|
|
|
return renderTask;
|
|
},
|
|
|
|
/**
|
|
* @return {Promise} A promise resolved with an {@link PDFOperatorList}
|
|
* object that represents page's operator list.
|
|
*/
|
|
getOperatorList: function PDFPageProxy_getOperatorList() {
|
|
function operatorListChanged() {
|
|
if (intentState.operatorList.lastChunk) {
|
|
intentState.opListReadCapability.resolve(intentState.operatorList);
|
|
|
|
var i = intentState.renderTasks.indexOf(opListTask);
|
|
if (i >= 0) {
|
|
intentState.renderTasks.splice(i, 1);
|
|
}
|
|
}
|
|
}
|
|
|
|
var renderingIntent = 'oplist';
|
|
if (!this.intentStates[renderingIntent]) {
|
|
this.intentStates[renderingIntent] = Object.create(null);
|
|
}
|
|
var intentState = this.intentStates[renderingIntent];
|
|
var opListTask;
|
|
|
|
if (!intentState.opListReadCapability) {
|
|
opListTask = {};
|
|
opListTask.operatorListChanged = operatorListChanged;
|
|
intentState.receivingOperatorList = true;
|
|
intentState.opListReadCapability = createPromiseCapability();
|
|
intentState.renderTasks = [];
|
|
intentState.renderTasks.push(opListTask);
|
|
intentState.operatorList = {
|
|
fnArray: [],
|
|
argsArray: [],
|
|
lastChunk: false,
|
|
};
|
|
|
|
this._stats.time('Page Request');
|
|
this.transport.messageHandler.send('RenderPageRequest', {
|
|
pageIndex: this.pageIndex,
|
|
intent: renderingIntent,
|
|
});
|
|
}
|
|
return intentState.opListReadCapability.promise;
|
|
},
|
|
|
|
/**
|
|
* @param {getTextContentParameters} params - getTextContent parameters.
|
|
* @return {ReadableStream} ReadableStream to read textContent chunks.
|
|
*/
|
|
streamTextContent(params = {}) {
|
|
const TEXT_CONTENT_CHUNK_SIZE = 100;
|
|
return this.transport.messageHandler.sendWithStream('GetTextContent', {
|
|
pageIndex: this.pageNumber - 1,
|
|
normalizeWhitespace: (params.normalizeWhitespace === true),
|
|
combineTextItems: (params.disableCombineTextItems !== true),
|
|
}, {
|
|
highWaterMark: TEXT_CONTENT_CHUNK_SIZE,
|
|
size(textContent) {
|
|
return textContent.items.length;
|
|
},
|
|
});
|
|
},
|
|
|
|
/**
|
|
* @param {getTextContentParameters} params - getTextContent parameters.
|
|
* @return {Promise} That is resolved a {@link TextContent}
|
|
* object that represent the page text content.
|
|
*/
|
|
getTextContent: function PDFPageProxy_getTextContent(params) {
|
|
params = params || {};
|
|
let readableStream = this.streamTextContent(params);
|
|
|
|
return new Promise(function(resolve, reject) {
|
|
function pump() {
|
|
reader.read().then(function({ value, done, }) {
|
|
if (done) {
|
|
resolve(textContent);
|
|
return;
|
|
}
|
|
Object.assign(textContent.styles, value.styles);
|
|
textContent.items.push(...value.items);
|
|
pump();
|
|
}, reject);
|
|
}
|
|
|
|
let reader = readableStream.getReader();
|
|
let textContent = {
|
|
items: [],
|
|
styles: Object.create(null),
|
|
};
|
|
|
|
pump();
|
|
});
|
|
},
|
|
|
|
/**
|
|
* Destroys page object.
|
|
*/
|
|
_destroy: function PDFPageProxy_destroy() {
|
|
this.destroyed = true;
|
|
this.transport.pageCache[this.pageIndex] = null;
|
|
|
|
var waitOn = [];
|
|
Object.keys(this.intentStates).forEach(function(intent) {
|
|
if (intent === 'oplist') {
|
|
// Avoid errors below, since the renderTasks are just stubs.
|
|
return;
|
|
}
|
|
var intentState = this.intentStates[intent];
|
|
intentState.renderTasks.forEach(function(renderTask) {
|
|
var renderCompleted = renderTask.capability.promise.
|
|
catch(function () {}); // ignoring failures
|
|
waitOn.push(renderCompleted);
|
|
renderTask.cancel();
|
|
});
|
|
}, this);
|
|
this.objs.clear();
|
|
this.annotationsPromise = null;
|
|
this.pendingCleanup = false;
|
|
return Promise.all(waitOn);
|
|
},
|
|
|
|
/**
|
|
* Cleans up resources allocated by the page.
|
|
* @param {boolean} resetStats - (optional) Reset page stats, if enabled.
|
|
* The default value is `false`.
|
|
*/
|
|
cleanup(resetStats = false) {
|
|
this.pendingCleanup = true;
|
|
this._tryCleanup(resetStats);
|
|
},
|
|
/**
|
|
* For internal use only. Attempts to clean up if rendering is in a state
|
|
* where that's possible.
|
|
* @ignore
|
|
*/
|
|
_tryCleanup(resetStats = false) {
|
|
if (!this.pendingCleanup ||
|
|
Object.keys(this.intentStates).some(function(intent) {
|
|
var intentState = this.intentStates[intent];
|
|
return (intentState.renderTasks.length !== 0 ||
|
|
intentState.receivingOperatorList);
|
|
}, this)) {
|
|
return;
|
|
}
|
|
|
|
Object.keys(this.intentStates).forEach(function(intent) {
|
|
delete this.intentStates[intent];
|
|
}, this);
|
|
this.objs.clear();
|
|
this.annotationsPromise = null;
|
|
if (resetStats && this._stats instanceof StatTimer) {
|
|
this._stats = new StatTimer();
|
|
}
|
|
this.pendingCleanup = false;
|
|
},
|
|
/**
|
|
* For internal use only.
|
|
* @ignore
|
|
*/
|
|
_startRenderPage: function PDFPageProxy_startRenderPage(transparency,
|
|
intent) {
|
|
var intentState = this.intentStates[intent];
|
|
// TODO Refactor RenderPageRequest to separate rendering
|
|
// and operator list logic
|
|
if (intentState.displayReadyCapability) {
|
|
intentState.displayReadyCapability.resolve(transparency);
|
|
}
|
|
},
|
|
/**
|
|
* For internal use only.
|
|
* @ignore
|
|
*/
|
|
_renderPageChunk: function PDFPageProxy_renderPageChunk(operatorListChunk,
|
|
intent) {
|
|
var intentState = this.intentStates[intent];
|
|
var i, ii;
|
|
// Add the new chunk to the current operator list.
|
|
for (i = 0, ii = operatorListChunk.length; i < ii; i++) {
|
|
intentState.operatorList.fnArray.push(operatorListChunk.fnArray[i]);
|
|
intentState.operatorList.argsArray.push(
|
|
operatorListChunk.argsArray[i]);
|
|
}
|
|
intentState.operatorList.lastChunk = operatorListChunk.lastChunk;
|
|
|
|
// Notify all the rendering tasks there are more operators to be consumed.
|
|
for (i = 0; i < intentState.renderTasks.length; i++) {
|
|
intentState.renderTasks[i].operatorListChanged();
|
|
}
|
|
|
|
if (operatorListChunk.lastChunk) {
|
|
intentState.receivingOperatorList = false;
|
|
this._tryCleanup();
|
|
}
|
|
},
|
|
|
|
/**
|
|
* @return {Object} Returns page stats, if enabled.
|
|
*/
|
|
get stats() {
|
|
return (this._stats instanceof StatTimer ? this._stats : null);
|
|
},
|
|
};
|
|
return PDFPageProxy;
|
|
})();
|
|
|
|
class LoopbackPort {
|
|
constructor(defer = true) {
|
|
this._listeners = [];
|
|
this._defer = defer;
|
|
this._deferred = Promise.resolve(undefined);
|
|
}
|
|
|
|
postMessage(obj, transfers) {
|
|
function cloneValue(value) {
|
|
// Trying to perform a structured clone close to the spec, including
|
|
// transfers.
|
|
if (typeof value !== 'object' || value === null) {
|
|
return value;
|
|
}
|
|
if (cloned.has(value)) { // already cloned the object
|
|
return cloned.get(value);
|
|
}
|
|
var result;
|
|
var buffer;
|
|
if ((buffer = value.buffer) && isArrayBuffer(buffer)) {
|
|
// We found object with ArrayBuffer (typed array).
|
|
var transferable = transfers && transfers.includes(buffer);
|
|
if (value === buffer) {
|
|
// Special case when we are faking typed arrays in compatibility.js.
|
|
result = value;
|
|
} else if (transferable) {
|
|
result = new value.constructor(buffer, value.byteOffset,
|
|
value.byteLength);
|
|
} else {
|
|
result = new value.constructor(value);
|
|
}
|
|
cloned.set(value, result);
|
|
return result;
|
|
}
|
|
result = Array.isArray(value) ? [] : {};
|
|
cloned.set(value, result); // adding to cache now for cyclic references
|
|
// Cloning all value and object properties, however ignoring properties
|
|
// defined via getter.
|
|
for (var i in value) {
|
|
var desc, p = value;
|
|
while (!(desc = Object.getOwnPropertyDescriptor(p, i))) {
|
|
p = Object.getPrototypeOf(p);
|
|
}
|
|
if (typeof desc.value === 'undefined' ||
|
|
typeof desc.value === 'function') {
|
|
continue;
|
|
}
|
|
result[i] = cloneValue(desc.value);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
if (!this._defer) {
|
|
this._listeners.forEach(function (listener) {
|
|
listener.call(this, { data: obj, });
|
|
}, this);
|
|
return;
|
|
}
|
|
|
|
var cloned = new WeakMap();
|
|
var e = { data: cloneValue(obj), };
|
|
this._deferred.then(() => {
|
|
this._listeners.forEach(function (listener) {
|
|
listener.call(this, e);
|
|
}, this);
|
|
});
|
|
}
|
|
|
|
addEventListener(name, listener) {
|
|
this._listeners.push(listener);
|
|
}
|
|
|
|
removeEventListener(name, listener) {
|
|
var i = this._listeners.indexOf(listener);
|
|
this._listeners.splice(i, 1);
|
|
}
|
|
|
|
terminate() {
|
|
this._listeners = [];
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @typedef {Object} PDFWorkerParameters
|
|
* @property {string} name - (optional) The name of the worker.
|
|
* @property {Object} port - (optional) The `workerPort`.
|
|
* @property {boolean} postMessageTransfers - (optional) Enables transfer usage
|
|
* in postMessage for ArrayBuffers. The default value is `true`.
|
|
* @property {number} verbosity - (optional) Controls the logging level; the
|
|
* constants from {VerbosityLevel} should be used.
|
|
*/
|
|
|
|
/**
|
|
* PDF.js web worker abstraction, it controls instantiation of PDF documents and
|
|
* WorkerTransport for them. If creation of a web worker is not possible,
|
|
* a "fake" worker will be used instead.
|
|
* @class
|
|
*/
|
|
var PDFWorker = (function PDFWorkerClosure() {
|
|
let nextFakeWorkerId = 0;
|
|
|
|
function getWorkerSrc() {
|
|
if (GlobalWorkerOptions.workerSrc) {
|
|
return GlobalWorkerOptions.workerSrc;
|
|
}
|
|
if (typeof workerSrc !== 'undefined') {
|
|
return workerSrc;
|
|
}
|
|
if (typeof PDFJSDev !== 'undefined' &&
|
|
PDFJSDev.test('PRODUCTION && !(MOZCENTRAL || FIREFOX)') &&
|
|
pdfjsFilePath) {
|
|
return pdfjsFilePath.replace(/(\.(?:min\.)?js)(\?.*)?$/i, '.worker$1$2');
|
|
}
|
|
throw new Error('No "GlobalWorkerOptions.workerSrc" specified.');
|
|
}
|
|
|
|
function getMainThreadWorkerMessageHandler() {
|
|
if (typeof window === 'undefined') {
|
|
return null;
|
|
}
|
|
return (window.pdfjsWorker && window.pdfjsWorker.WorkerMessageHandler);
|
|
}
|
|
|
|
let fakeWorkerFilesLoadedCapability;
|
|
|
|
// Loads worker code into main thread.
|
|
function setupFakeWorkerGlobal() {
|
|
if (fakeWorkerFilesLoadedCapability) {
|
|
return fakeWorkerFilesLoadedCapability.promise;
|
|
}
|
|
fakeWorkerFilesLoadedCapability = createPromiseCapability();
|
|
|
|
let mainWorkerMessageHandler = getMainThreadWorkerMessageHandler();
|
|
if (mainWorkerMessageHandler) {
|
|
// The worker was already loaded using a `<script>` tag.
|
|
fakeWorkerFilesLoadedCapability.resolve(mainWorkerMessageHandler);
|
|
return fakeWorkerFilesLoadedCapability.promise;
|
|
}
|
|
// In the developer build load worker_loader.js which in turn loads all the
|
|
// other files and resolves the promise. In production only the
|
|
// pdf.worker.js file is needed.
|
|
if (typeof PDFJSDev === 'undefined' || !PDFJSDev.test('PRODUCTION')) {
|
|
if (typeof SystemJS === 'object') {
|
|
SystemJS.import('pdfjs/core/worker').then((worker) => {
|
|
fakeWorkerFilesLoadedCapability.resolve(worker.WorkerMessageHandler);
|
|
}).catch(fakeWorkerFilesLoadedCapability.reject);
|
|
} else if (typeof require === 'function') {
|
|
try {
|
|
let worker = require('../core/worker.js');
|
|
fakeWorkerFilesLoadedCapability.resolve(worker.WorkerMessageHandler);
|
|
} catch (ex) {
|
|
fakeWorkerFilesLoadedCapability.reject(ex);
|
|
}
|
|
} else {
|
|
fakeWorkerFilesLoadedCapability.reject(new Error(
|
|
'SystemJS or CommonJS must be used to load fake worker.'));
|
|
}
|
|
} else {
|
|
const loader = fakeWorkerFilesLoader || function() {
|
|
return loadScript(getWorkerSrc()).then(function() {
|
|
return window.pdfjsWorker.WorkerMessageHandler;
|
|
});
|
|
};
|
|
loader().then(fakeWorkerFilesLoadedCapability.resolve,
|
|
fakeWorkerFilesLoadedCapability.reject);
|
|
}
|
|
return fakeWorkerFilesLoadedCapability.promise;
|
|
}
|
|
|
|
function createCDNWrapper(url) {
|
|
// We will rely on blob URL's property to specify origin.
|
|
// We want this function to fail in case if createObjectURL or Blob do not
|
|
// exist or fail for some reason -- our Worker creation will fail anyway.
|
|
var wrapper = 'importScripts(\'' + url + '\');';
|
|
return URL.createObjectURL(new Blob([wrapper]));
|
|
}
|
|
|
|
let pdfWorkerPorts = new WeakMap();
|
|
|
|
/**
|
|
* @param {PDFWorkerParameters} params - The worker initialization parameters.
|
|
*/
|
|
function PDFWorker({ name = null, port = null,
|
|
postMessageTransfers = true,
|
|
verbosity = getVerbosityLevel(), } = {}) {
|
|
if (port && pdfWorkerPorts.has(port)) {
|
|
throw new Error('Cannot use more than one PDFWorker per port');
|
|
}
|
|
|
|
this.name = name;
|
|
this.destroyed = false;
|
|
this.postMessageTransfers = postMessageTransfers !== false;
|
|
this.verbosity = verbosity;
|
|
|
|
this._readyCapability = createPromiseCapability();
|
|
this._port = null;
|
|
this._webWorker = null;
|
|
this._messageHandler = null;
|
|
|
|
if (port) {
|
|
pdfWorkerPorts.set(port, this);
|
|
this._initializeFromPort(port);
|
|
return;
|
|
}
|
|
|
|
this._initialize();
|
|
}
|
|
|
|
PDFWorker.prototype = /** @lends PDFWorker.prototype */ {
|
|
get promise() {
|
|
return this._readyCapability.promise;
|
|
},
|
|
|
|
get port() {
|
|
return this._port;
|
|
},
|
|
|
|
get messageHandler() {
|
|
return this._messageHandler;
|
|
},
|
|
|
|
_initializeFromPort: function PDFWorker_initializeFromPort(port) {
|
|
this._port = port;
|
|
this._messageHandler = new MessageHandler('main', 'worker', port);
|
|
this._messageHandler.on('ready', function () {
|
|
// Ignoring 'ready' event -- MessageHandler shall be already initialized
|
|
// and ready to accept the messages.
|
|
});
|
|
this._readyCapability.resolve();
|
|
},
|
|
|
|
_initialize: function PDFWorker_initialize() {
|
|
// If worker support isn't disabled explicit and the browser has worker
|
|
// support, create a new web worker and test if it/the browser fulfills
|
|
// all requirements to run parts of pdf.js in a web worker.
|
|
// Right now, the requirement is, that an Uint8Array is still an
|
|
// Uint8Array as it arrives on the worker. (Chrome added this with v.15.)
|
|
if (typeof Worker !== 'undefined' && !isWorkerDisabled &&
|
|
!getMainThreadWorkerMessageHandler()) {
|
|
var workerSrc = getWorkerSrc();
|
|
|
|
try {
|
|
// Wraps workerSrc path into blob URL, if the former does not belong
|
|
// to the same origin.
|
|
if (typeof PDFJSDev !== 'undefined' && PDFJSDev.test('GENERIC') &&
|
|
!isSameOrigin(window.location.href, workerSrc)) {
|
|
workerSrc = createCDNWrapper(
|
|
new URL(workerSrc, window.location).href);
|
|
}
|
|
|
|
// Some versions of FF can't create a worker on localhost, see:
|
|
// https://bugzilla.mozilla.org/show_bug.cgi?id=683280
|
|
var worker = new Worker(workerSrc);
|
|
var messageHandler = new MessageHandler('main', 'worker', worker);
|
|
var terminateEarly = () => {
|
|
worker.removeEventListener('error', onWorkerError);
|
|
messageHandler.destroy();
|
|
worker.terminate();
|
|
if (this.destroyed) {
|
|
this._readyCapability.reject(new Error('Worker was destroyed'));
|
|
} else {
|
|
// Fall back to fake worker if the termination is caused by an
|
|
// error (e.g. NetworkError / SecurityError).
|
|
this._setupFakeWorker();
|
|
}
|
|
};
|
|
|
|
var onWorkerError = () => {
|
|
if (!this._webWorker) {
|
|
// Worker failed to initialize due to an error. Clean up and fall
|
|
// back to the fake worker.
|
|
terminateEarly();
|
|
}
|
|
};
|
|
worker.addEventListener('error', onWorkerError);
|
|
|
|
messageHandler.on('test', (data) => {
|
|
worker.removeEventListener('error', onWorkerError);
|
|
if (this.destroyed) {
|
|
terminateEarly();
|
|
return; // worker was destroyed
|
|
}
|
|
if (data && data.supportTypedArray) {
|
|
this._messageHandler = messageHandler;
|
|
this._port = worker;
|
|
this._webWorker = worker;
|
|
if (!data.supportTransfers) {
|
|
this.postMessageTransfers = false;
|
|
}
|
|
this._readyCapability.resolve();
|
|
// Send global setting, e.g. verbosity level.
|
|
messageHandler.send('configure', {
|
|
verbosity: this.verbosity,
|
|
});
|
|
} else {
|
|
this._setupFakeWorker();
|
|
messageHandler.destroy();
|
|
worker.terminate();
|
|
}
|
|
});
|
|
|
|
messageHandler.on('ready', (data) => {
|
|
worker.removeEventListener('error', onWorkerError);
|
|
if (this.destroyed) {
|
|
terminateEarly();
|
|
return; // worker was destroyed
|
|
}
|
|
try {
|
|
sendTest();
|
|
} catch (e) {
|
|
// We need fallback to a faked worker.
|
|
this._setupFakeWorker();
|
|
}
|
|
});
|
|
|
|
const sendTest = () => {
|
|
let testObj = new Uint8Array([this.postMessageTransfers ? 255 : 0]);
|
|
// Some versions of Opera throw a DATA_CLONE_ERR on serializing the
|
|
// typed array. Also, checking if we can use transfers.
|
|
try {
|
|
messageHandler.send('test', testObj, [testObj.buffer]);
|
|
} catch (ex) {
|
|
info('Cannot use postMessage transfers');
|
|
testObj[0] = 0;
|
|
messageHandler.send('test', testObj);
|
|
}
|
|
};
|
|
|
|
// It might take time for worker to initialize (especially when AMD
|
|
// loader is used). We will try to send test immediately, and then
|
|
// when 'ready' message will arrive. The worker shall process only
|
|
// first received 'test'.
|
|
sendTest();
|
|
return;
|
|
} catch (e) {
|
|
info('The worker has been disabled.');
|
|
}
|
|
}
|
|
// Either workers are disabled, not supported or have thrown an exception.
|
|
// Thus, we fallback to a faked worker.
|
|
this._setupFakeWorker();
|
|
},
|
|
|
|
_setupFakeWorker: function PDFWorker_setupFakeWorker() {
|
|
if (!isWorkerDisabled) {
|
|
warn('Setting up fake worker.');
|
|
isWorkerDisabled = true;
|
|
}
|
|
|
|
setupFakeWorkerGlobal().then((WorkerMessageHandler) => {
|
|
if (this.destroyed) {
|
|
this._readyCapability.reject(new Error('Worker was destroyed'));
|
|
return;
|
|
}
|
|
let port = new LoopbackPort();
|
|
this._port = port;
|
|
|
|
// All fake workers use the same port, making id unique.
|
|
var id = 'fake' + (nextFakeWorkerId++);
|
|
|
|
// If the main thread is our worker, setup the handling for the
|
|
// messages -- the main thread sends to it self.
|
|
var workerHandler = new MessageHandler(id + '_worker', id, port);
|
|
WorkerMessageHandler.setup(workerHandler, port);
|
|
|
|
var messageHandler = new MessageHandler(id, id + '_worker', port);
|
|
this._messageHandler = messageHandler;
|
|
this._readyCapability.resolve();
|
|
}).catch((reason) => {
|
|
this._readyCapability.reject(
|
|
new Error(`Setting up fake worker failed: "${reason.message}".`));
|
|
});
|
|
},
|
|
|
|
/**
|
|
* Destroys the worker instance.
|
|
*/
|
|
destroy: function PDFWorker_destroy() {
|
|
this.destroyed = true;
|
|
if (this._webWorker) {
|
|
// We need to terminate only web worker created resource.
|
|
this._webWorker.terminate();
|
|
this._webWorker = null;
|
|
}
|
|
pdfWorkerPorts.delete(this._port);
|
|
this._port = null;
|
|
if (this._messageHandler) {
|
|
this._messageHandler.destroy();
|
|
this._messageHandler = null;
|
|
}
|
|
},
|
|
};
|
|
|
|
/**
|
|
* @param {PDFWorkerParameters} params - The worker initialization parameters.
|
|
*/
|
|
PDFWorker.fromPort = function(params) {
|
|
if (!params || !params.port) {
|
|
throw new Error('PDFWorker.fromPort - invalid method signature.');
|
|
}
|
|
if (pdfWorkerPorts.has(params.port)) {
|
|
return pdfWorkerPorts.get(params.port);
|
|
}
|
|
return new PDFWorker(params);
|
|
};
|
|
|
|
PDFWorker.getWorkerSrc = function() {
|
|
return getWorkerSrc();
|
|
};
|
|
|
|
return PDFWorker;
|
|
})();
|
|
|
|
/**
|
|
* For internal use only.
|
|
* @ignore
|
|
*/
|
|
class WorkerTransport {
|
|
constructor(messageHandler, loadingTask, networkStream, params) {
|
|
this.messageHandler = messageHandler;
|
|
this.loadingTask = loadingTask;
|
|
this.commonObjs = new PDFObjects();
|
|
this.fontLoader = new FontLoader(loadingTask.docId);
|
|
this._params = params;
|
|
this.CMapReaderFactory = new params.CMapReaderFactory({
|
|
baseUrl: params.cMapUrl,
|
|
isCompressed: params.cMapPacked,
|
|
});
|
|
|
|
this.destroyed = false;
|
|
this.destroyCapability = null;
|
|
this._passwordCapability = null;
|
|
|
|
this._networkStream = networkStream;
|
|
this._fullReader = null;
|
|
this._lastProgress = null;
|
|
|
|
this.pageCache = [];
|
|
this.pagePromises = [];
|
|
this.downloadInfoCapability = createPromiseCapability();
|
|
|
|
this.setupMessageHandler();
|
|
}
|
|
|
|
destroy() {
|
|
if (this.destroyCapability) {
|
|
return this.destroyCapability.promise;
|
|
}
|
|
|
|
this.destroyed = true;
|
|
this.destroyCapability = createPromiseCapability();
|
|
|
|
if (this._passwordCapability) {
|
|
this._passwordCapability.reject(
|
|
new Error('Worker was destroyed during onPassword callback'));
|
|
}
|
|
|
|
const waitOn = [];
|
|
// We need to wait for all renderings to be completed, e.g.
|
|
// timeout/rAF can take a long time.
|
|
this.pageCache.forEach(function(page) {
|
|
if (page) {
|
|
waitOn.push(page._destroy());
|
|
}
|
|
});
|
|
this.pageCache = [];
|
|
this.pagePromises = [];
|
|
// We also need to wait for the worker to finish its long running tasks.
|
|
const terminated = this.messageHandler.sendWithPromise('Terminate', null);
|
|
waitOn.push(terminated);
|
|
Promise.all(waitOn).then(() => {
|
|
this.fontLoader.clear();
|
|
if (this._networkStream) {
|
|
this._networkStream.cancelAllRequests();
|
|
}
|
|
|
|
if (this.messageHandler) {
|
|
this.messageHandler.destroy();
|
|
this.messageHandler = null;
|
|
}
|
|
this.destroyCapability.resolve();
|
|
}, this.destroyCapability.reject);
|
|
return this.destroyCapability.promise;
|
|
}
|
|
|
|
setupMessageHandler() {
|
|
const { messageHandler, loadingTask, } = this;
|
|
|
|
messageHandler.on('GetReader', function(data, sink) {
|
|
assert(this._networkStream);
|
|
this._fullReader = this._networkStream.getFullReader();
|
|
this._fullReader.onProgress = (evt) => {
|
|
this._lastProgress = {
|
|
loaded: evt.loaded,
|
|
total: evt.total,
|
|
};
|
|
};
|
|
sink.onPull = () => {
|
|
this._fullReader.read().then(function({ value, done, }) {
|
|
if (done) {
|
|
sink.close();
|
|
return;
|
|
}
|
|
assert(isArrayBuffer(value));
|
|
// Enqueue data chunk into sink, and transfer it
|
|
// to other side as `Transferable` object.
|
|
sink.enqueue(new Uint8Array(value), 1, [value]);
|
|
}).catch((reason) => {
|
|
sink.error(reason);
|
|
});
|
|
};
|
|
|
|
sink.onCancel = (reason) => {
|
|
this._fullReader.cancel(reason);
|
|
};
|
|
}, this);
|
|
|
|
messageHandler.on('ReaderHeadersReady', function(data) {
|
|
const headersCapability = createPromiseCapability();
|
|
const fullReader = this._fullReader;
|
|
fullReader.headersReady.then(() => {
|
|
// If stream or range are disabled, it's our only way to report
|
|
// loading progress.
|
|
if (!fullReader.isStreamingSupported ||
|
|
!fullReader.isRangeSupported) {
|
|
if (this._lastProgress) {
|
|
if (loadingTask.onProgress) {
|
|
loadingTask.onProgress(this._lastProgress);
|
|
}
|
|
}
|
|
fullReader.onProgress = (evt) => {
|
|
if (loadingTask.onProgress) {
|
|
loadingTask.onProgress({
|
|
loaded: evt.loaded,
|
|
total: evt.total,
|
|
});
|
|
}
|
|
};
|
|
}
|
|
|
|
headersCapability.resolve({
|
|
isStreamingSupported: fullReader.isStreamingSupported,
|
|
isRangeSupported: fullReader.isRangeSupported,
|
|
contentLength: fullReader.contentLength,
|
|
});
|
|
}, headersCapability.reject);
|
|
|
|
return headersCapability.promise;
|
|
}, this);
|
|
|
|
messageHandler.on('GetRangeReader', function(data, sink) {
|
|
assert(this._networkStream);
|
|
const rangeReader =
|
|
this._networkStream.getRangeReader(data.begin, data.end);
|
|
|
|
sink.onPull = () => {
|
|
rangeReader.read().then(function({ value, done, }) {
|
|
if (done) {
|
|
sink.close();
|
|
return;
|
|
}
|
|
assert(isArrayBuffer(value));
|
|
sink.enqueue(new Uint8Array(value), 1, [value]);
|
|
}).catch((reason) => {
|
|
sink.error(reason);
|
|
});
|
|
};
|
|
|
|
sink.onCancel = (reason) => {
|
|
rangeReader.cancel(reason);
|
|
};
|
|
}, this);
|
|
|
|
messageHandler.on('GetDoc', function({ pdfInfo, }) {
|
|
this.numPages = pdfInfo.numPages;
|
|
this.pdfDocument = new PDFDocumentProxy(pdfInfo, this, loadingTask);
|
|
loadingTask._capability.resolve(this.pdfDocument);
|
|
}, this);
|
|
|
|
messageHandler.on('PasswordRequest', function(exception) {
|
|
this._passwordCapability = createPromiseCapability();
|
|
|
|
if (loadingTask.onPassword) {
|
|
const updatePassword = (password) => {
|
|
this._passwordCapability.resolve({
|
|
password,
|
|
});
|
|
};
|
|
try {
|
|
loadingTask.onPassword(updatePassword, exception.code);
|
|
} catch (ex) {
|
|
this._passwordCapability.reject(ex);
|
|
}
|
|
} else {
|
|
this._passwordCapability.reject(
|
|
new PasswordException(exception.message, exception.code));
|
|
}
|
|
return this._passwordCapability.promise;
|
|
}, this);
|
|
|
|
messageHandler.on('PasswordException', function(exception) {
|
|
loadingTask._capability.reject(
|
|
new PasswordException(exception.message, exception.code));
|
|
}, this);
|
|
|
|
messageHandler.on('InvalidPDF', function(exception) {
|
|
loadingTask._capability.reject(
|
|
new InvalidPDFException(exception.message));
|
|
}, this);
|
|
|
|
messageHandler.on('MissingPDF', function(exception) {
|
|
loadingTask._capability.reject(
|
|
new MissingPDFException(exception.message));
|
|
}, this);
|
|
|
|
messageHandler.on('UnexpectedResponse', function(exception) {
|
|
loadingTask._capability.reject(
|
|
new UnexpectedResponseException(exception.message, exception.status));
|
|
}, this);
|
|
|
|
messageHandler.on('UnknownError', function(exception) {
|
|
loadingTask._capability.reject(
|
|
new UnknownErrorException(exception.message, exception.details));
|
|
}, this);
|
|
|
|
messageHandler.on('DataLoaded', function(data) {
|
|
this.downloadInfoCapability.resolve(data);
|
|
}, this);
|
|
|
|
messageHandler.on('StartRenderPage', function(data) {
|
|
if (this.destroyed) {
|
|
return; // Ignore any pending requests if the worker was terminated.
|
|
}
|
|
|
|
const page = this.pageCache[data.pageIndex];
|
|
page._stats.timeEnd('Page Request');
|
|
page._startRenderPage(data.transparency, data.intent);
|
|
}, this);
|
|
|
|
messageHandler.on('RenderPageChunk', function(data) {
|
|
if (this.destroyed) {
|
|
return; // Ignore any pending requests if the worker was terminated.
|
|
}
|
|
|
|
const page = this.pageCache[data.pageIndex];
|
|
page._renderPageChunk(data.operatorList, data.intent);
|
|
}, this);
|
|
|
|
messageHandler.on('commonobj', function(data) {
|
|
if (this.destroyed) {
|
|
return; // Ignore any pending requests if the worker was terminated.
|
|
}
|
|
|
|
const [id, type, exportedData] = data;
|
|
if (this.commonObjs.hasData(id)) {
|
|
return;
|
|
}
|
|
|
|
switch (type) {
|
|
case 'Font':
|
|
const params = this._params;
|
|
|
|
if ('error' in exportedData) {
|
|
const exportedError = exportedData.error;
|
|
warn(`Error during font loading: ${exportedError}`);
|
|
this.commonObjs.resolve(id, exportedError);
|
|
break;
|
|
}
|
|
|
|
let fontRegistry = null;
|
|
if (params.pdfBug && globalScope.FontInspector &&
|
|
globalScope.FontInspector.enabled) {
|
|
fontRegistry = {
|
|
registerFont(font, url) {
|
|
globalScope['FontInspector'].fontAdded(font, url);
|
|
},
|
|
};
|
|
}
|
|
const font = new FontFaceObject(exportedData, {
|
|
isEvalSupported: params.isEvalSupported,
|
|
disableFontFace: params.disableFontFace,
|
|
ignoreErrors: params.ignoreErrors,
|
|
onUnsupportedFeature: this._onUnsupportedFeature.bind(this),
|
|
fontRegistry,
|
|
});
|
|
const fontReady = (fontObjs) => {
|
|
this.commonObjs.resolve(id, font);
|
|
};
|
|
|
|
this.fontLoader.bind([font], fontReady);
|
|
break;
|
|
case 'FontPath':
|
|
this.commonObjs.resolve(id, exportedData);
|
|
break;
|
|
default:
|
|
throw new Error(`Got unknown common object type ${type}`);
|
|
}
|
|
}, this);
|
|
|
|
messageHandler.on('obj', function(data) {
|
|
if (this.destroyed) {
|
|
return; // Ignore any pending requests if the worker was terminated.
|
|
}
|
|
|
|
const [id, pageIndex, type, imageData] = data;
|
|
const pageProxy = this.pageCache[pageIndex];
|
|
if (pageProxy.objs.hasData(id)) {
|
|
return;
|
|
}
|
|
|
|
switch (type) {
|
|
case 'JpegStream':
|
|
return new Promise((resolve, reject) => {
|
|
const img = new Image();
|
|
img.onload = function() {
|
|
resolve(img);
|
|
};
|
|
img.onerror = function() {
|
|
reject(new Error('Error during JPEG image loading'));
|
|
// Note that when the browser image loading/decoding fails,
|
|
// we'll fallback to the built-in PDF.js JPEG decoder; see
|
|
// `PartialEvaluator.buildPaintImageXObject` in the
|
|
// `src/core/evaluator.js` file.
|
|
};
|
|
img.src = imageData;
|
|
}).then((img) => {
|
|
pageProxy.objs.resolve(id, img);
|
|
});
|
|
case 'Image':
|
|
pageProxy.objs.resolve(id, imageData);
|
|
|
|
// Heuristic that will allow us not to store large data.
|
|
const MAX_IMAGE_SIZE_TO_STORE = 8000000;
|
|
if (imageData && 'data' in imageData &&
|
|
imageData.data.length > MAX_IMAGE_SIZE_TO_STORE) {
|
|
pageProxy.cleanupAfterRender = true;
|
|
}
|
|
break;
|
|
default:
|
|
throw new Error(`Got unknown object type ${type}`);
|
|
}
|
|
}, this);
|
|
|
|
messageHandler.on('DocProgress', function(data) {
|
|
if (this.destroyed) {
|
|
return; // Ignore any pending requests if the worker was terminated.
|
|
}
|
|
|
|
if (loadingTask.onProgress) {
|
|
loadingTask.onProgress({
|
|
loaded: data.loaded,
|
|
total: data.total,
|
|
});
|
|
}
|
|
}, this);
|
|
|
|
messageHandler.on('PageError', function(data) {
|
|
if (this.destroyed) {
|
|
return; // Ignore any pending requests if the worker was terminated.
|
|
}
|
|
|
|
const page = this.pageCache[data.pageNum - 1];
|
|
const intentState = page.intentStates[data.intent];
|
|
|
|
if (intentState.displayReadyCapability) {
|
|
intentState.displayReadyCapability.reject(data.error);
|
|
} else {
|
|
throw new Error(data.error);
|
|
}
|
|
|
|
if (intentState.operatorList) {
|
|
// Mark operator list as complete.
|
|
intentState.operatorList.lastChunk = true;
|
|
for (let i = 0; i < intentState.renderTasks.length; i++) {
|
|
intentState.renderTasks[i].operatorListChanged();
|
|
}
|
|
}
|
|
}, this);
|
|
|
|
messageHandler.on('UnsupportedFeature', this._onUnsupportedFeature, this);
|
|
|
|
messageHandler.on('JpegDecode', function(data) {
|
|
if (this.destroyed) {
|
|
return Promise.reject(new Error('Worker was destroyed'));
|
|
}
|
|
|
|
if (typeof document === 'undefined') {
|
|
// Make sure that this code is not executing in node.js, as
|
|
// it's using DOM image, and there is no library to support that.
|
|
return Promise.reject(new Error('"document" is not defined.'));
|
|
}
|
|
|
|
const [imageUrl, components] = data;
|
|
if (components !== 3 && components !== 1) {
|
|
return Promise.reject(
|
|
new Error('Only 3 components or 1 component can be returned'));
|
|
}
|
|
|
|
return new Promise(function (resolve, reject) {
|
|
const img = new Image();
|
|
img.onload = function () {
|
|
const width = img.width;
|
|
const height = img.height;
|
|
const size = width * height;
|
|
const rgbaLength = size * 4;
|
|
const buf = new Uint8ClampedArray(size * components);
|
|
const tmpCanvas = document.createElement('canvas');
|
|
tmpCanvas.width = width;
|
|
tmpCanvas.height = height;
|
|
const tmpCtx = tmpCanvas.getContext('2d');
|
|
tmpCtx.drawImage(img, 0, 0);
|
|
const data = tmpCtx.getImageData(0, 0, width, height).data;
|
|
|
|
if (components === 3) {
|
|
for (let i = 0, j = 0; i < rgbaLength; i += 4, j += 3) {
|
|
buf[j] = data[i];
|
|
buf[j + 1] = data[i + 1];
|
|
buf[j + 2] = data[i + 2];
|
|
}
|
|
} else if (components === 1) {
|
|
for (let i = 0, j = 0; i < rgbaLength; i += 4, j++) {
|
|
buf[j] = data[i];
|
|
}
|
|
}
|
|
resolve({ data: buf, width, height, });
|
|
};
|
|
img.onerror = function () {
|
|
reject(new Error('JpegDecode failed to load image'));
|
|
};
|
|
img.src = imageUrl;
|
|
});
|
|
}, this);
|
|
|
|
messageHandler.on('FetchBuiltInCMap', function(data) {
|
|
if (this.destroyed) {
|
|
return Promise.reject(new Error('Worker was destroyed'));
|
|
}
|
|
return this.CMapReaderFactory.fetch({
|
|
name: data.name,
|
|
});
|
|
}, this);
|
|
}
|
|
|
|
_onUnsupportedFeature({ featureId, }) {
|
|
if (this.destroyed) {
|
|
return; // Ignore any pending requests if the worker was terminated.
|
|
}
|
|
if (this.loadingTask.onUnsupportedFeature) {
|
|
this.loadingTask.onUnsupportedFeature(featureId);
|
|
}
|
|
}
|
|
|
|
getData() {
|
|
return this.messageHandler.sendWithPromise('GetData', null);
|
|
}
|
|
|
|
getPage(pageNumber) {
|
|
if (!Number.isInteger(pageNumber) ||
|
|
pageNumber <= 0 || pageNumber > this.numPages) {
|
|
return Promise.reject(new Error('Invalid page request'));
|
|
}
|
|
|
|
const pageIndex = pageNumber - 1;
|
|
if (pageIndex in this.pagePromises) {
|
|
return this.pagePromises[pageIndex];
|
|
}
|
|
const promise = this.messageHandler.sendWithPromise('GetPage', {
|
|
pageIndex,
|
|
}).then((pageInfo) => {
|
|
if (this.destroyed) {
|
|
throw new Error('Transport destroyed');
|
|
}
|
|
const page = new PDFPageProxy(pageIndex, pageInfo, this,
|
|
this._params.pdfBug);
|
|
this.pageCache[pageIndex] = page;
|
|
return page;
|
|
});
|
|
this.pagePromises[pageIndex] = promise;
|
|
return promise;
|
|
}
|
|
|
|
getPageIndex(ref) {
|
|
return this.messageHandler.sendWithPromise('GetPageIndex', {
|
|
ref,
|
|
}).catch(function(reason) {
|
|
return Promise.reject(new Error(reason));
|
|
});
|
|
}
|
|
|
|
getAnnotations(pageIndex, intent) {
|
|
return this.messageHandler.sendWithPromise('GetAnnotations', {
|
|
pageIndex,
|
|
intent,
|
|
});
|
|
}
|
|
|
|
getDestinations() {
|
|
return this.messageHandler.sendWithPromise('GetDestinations', null);
|
|
}
|
|
|
|
getDestination(id) {
|
|
if (typeof id !== 'string') {
|
|
return Promise.reject(new Error('Invalid destination request.'));
|
|
}
|
|
return this.messageHandler.sendWithPromise('GetDestination', {
|
|
id,
|
|
});
|
|
}
|
|
|
|
getPageLabels() {
|
|
return this.messageHandler.sendWithPromise('GetPageLabels', null);
|
|
}
|
|
|
|
getPageMode() {
|
|
return this.messageHandler.sendWithPromise('GetPageMode', null);
|
|
}
|
|
|
|
getAttachments() {
|
|
return this.messageHandler.sendWithPromise('GetAttachments', null);
|
|
}
|
|
|
|
getJavaScript() {
|
|
return this.messageHandler.sendWithPromise('GetJavaScript', null);
|
|
}
|
|
|
|
getOutline() {
|
|
return this.messageHandler.sendWithPromise('GetOutline', null);
|
|
}
|
|
|
|
getPermissions() {
|
|
return this.messageHandler.sendWithPromise('GetPermissions', null);
|
|
}
|
|
|
|
getMetadata() {
|
|
return this.messageHandler.sendWithPromise('GetMetadata', null).
|
|
then((results) => {
|
|
return {
|
|
info: results[0],
|
|
metadata: (results[1] ? new Metadata(results[1]) : null),
|
|
contentDispositionFilename: (this._fullReader ?
|
|
this._fullReader.filename : null),
|
|
};
|
|
});
|
|
}
|
|
|
|
getStats() {
|
|
return this.messageHandler.sendWithPromise('GetStats', null);
|
|
}
|
|
|
|
startCleanup() {
|
|
this.messageHandler.sendWithPromise('Cleanup', null).then(() => {
|
|
for (let i = 0, ii = this.pageCache.length; i < ii; i++) {
|
|
const page = this.pageCache[i];
|
|
if (page) {
|
|
page.cleanup();
|
|
}
|
|
}
|
|
this.commonObjs.clear();
|
|
this.fontLoader.clear();
|
|
});
|
|
}
|
|
|
|
get loadingParams() {
|
|
const params = this._params;
|
|
return shadow(this, 'loadingParams', {
|
|
disableAutoFetch: params.disableAutoFetch,
|
|
disableCreateObjectURL: params.disableCreateObjectURL,
|
|
disableFontFace: params.disableFontFace,
|
|
nativeImageDecoderSupport: params.nativeImageDecoderSupport,
|
|
});
|
|
}
|
|
}
|
|
|
|
/**
|
|
* A PDF document and page is built of many objects. E.g. there are objects
|
|
* for fonts, images, rendering code and such. These objects might get processed
|
|
* inside of a worker. The `PDFObjects` implements some basic functions to
|
|
* manage these objects.
|
|
* @ignore
|
|
*/
|
|
var PDFObjects = (function PDFObjectsClosure() {
|
|
function PDFObjects() {
|
|
this.objs = Object.create(null);
|
|
}
|
|
|
|
PDFObjects.prototype = {
|
|
/**
|
|
* Internal function.
|
|
* Ensures there is an object defined for `objId`.
|
|
*/
|
|
ensureObj: function PDFObjects_ensureObj(objId) {
|
|
if (this.objs[objId]) {
|
|
return this.objs[objId];
|
|
}
|
|
|
|
var obj = {
|
|
capability: createPromiseCapability(),
|
|
data: null,
|
|
resolved: false,
|
|
};
|
|
this.objs[objId] = obj;
|
|
|
|
return obj;
|
|
},
|
|
|
|
/**
|
|
* If called *without* callback, this returns the data of `objId` but the
|
|
* object needs to be resolved. If it isn't, this function throws.
|
|
*
|
|
* If called *with* a callback, the callback is called with the data of the
|
|
* object once the object is resolved. That means, if you call this
|
|
* function and the object is already resolved, the callback gets called
|
|
* right away.
|
|
*/
|
|
get: function PDFObjects_get(objId, callback) {
|
|
// If there is a callback, then the get can be async and the object is
|
|
// not required to be resolved right now
|
|
if (callback) {
|
|
this.ensureObj(objId).capability.promise.then(callback);
|
|
return null;
|
|
}
|
|
|
|
// If there isn't a callback, the user expects to get the resolved data
|
|
// directly.
|
|
var obj = this.objs[objId];
|
|
|
|
// If there isn't an object yet or the object isn't resolved, then the
|
|
// data isn't ready yet!
|
|
if (!obj || !obj.resolved) {
|
|
throw new Error(`Requesting object that isn't resolved yet ${objId}`);
|
|
}
|
|
|
|
return obj.data;
|
|
},
|
|
|
|
/**
|
|
* Resolves the object `objId` with optional `data`.
|
|
*/
|
|
resolve: function PDFObjects_resolve(objId, data) {
|
|
var obj = this.ensureObj(objId);
|
|
|
|
obj.resolved = true;
|
|
obj.data = data;
|
|
obj.capability.resolve(data);
|
|
},
|
|
|
|
isResolved: function PDFObjects_isResolved(objId) {
|
|
var objs = this.objs;
|
|
|
|
if (!objs[objId]) {
|
|
return false;
|
|
}
|
|
return objs[objId].resolved;
|
|
},
|
|
|
|
hasData: function PDFObjects_hasData(objId) {
|
|
return this.isResolved(objId);
|
|
},
|
|
|
|
/**
|
|
* Returns the data of `objId` if object exists, null otherwise.
|
|
*/
|
|
getData: function PDFObjects_getData(objId) {
|
|
var objs = this.objs;
|
|
if (!objs[objId] || !objs[objId].resolved) {
|
|
return null;
|
|
}
|
|
return objs[objId].data;
|
|
},
|
|
|
|
clear: function PDFObjects_clear() {
|
|
this.objs = Object.create(null);
|
|
},
|
|
};
|
|
return PDFObjects;
|
|
})();
|
|
|
|
/**
|
|
* Allows controlling of the rendering tasks.
|
|
* @class
|
|
* @alias RenderTask
|
|
*/
|
|
var RenderTask = (function RenderTaskClosure() {
|
|
function RenderTask(internalRenderTask) {
|
|
this._internalRenderTask = internalRenderTask;
|
|
|
|
/**
|
|
* Callback for incremental rendering -- a function that will be called
|
|
* each time the rendering is paused. To continue rendering call the
|
|
* function that is the first argument to the callback.
|
|
* @type {function}
|
|
*/
|
|
this.onContinue = null;
|
|
}
|
|
|
|
RenderTask.prototype = /** @lends RenderTask.prototype */ {
|
|
/**
|
|
* Promise for rendering task completion.
|
|
* @return {Promise}
|
|
*/
|
|
get promise() {
|
|
return this._internalRenderTask.capability.promise;
|
|
},
|
|
|
|
/**
|
|
* Cancels the rendering task. If the task is currently rendering it will
|
|
* not be cancelled until graphics pauses with a timeout. The promise that
|
|
* this object extends will be rejected when cancelled.
|
|
*/
|
|
cancel: function RenderTask_cancel() {
|
|
this._internalRenderTask.cancel();
|
|
},
|
|
|
|
/**
|
|
* Registers callbacks to indicate the rendering task completion.
|
|
*
|
|
* @param {function} onFulfilled The callback for the rendering completion.
|
|
* @param {function} onRejected The callback for the rendering failure.
|
|
* @return {Promise} A promise that is resolved after the onFulfilled or
|
|
* onRejected callback.
|
|
*/
|
|
then: function RenderTask_then(onFulfilled, onRejected) {
|
|
return this.promise.then.apply(this.promise, arguments);
|
|
},
|
|
};
|
|
|
|
return RenderTask;
|
|
})();
|
|
|
|
/**
|
|
* For internal use only.
|
|
* @ignore
|
|
*/
|
|
var InternalRenderTask = (function InternalRenderTaskClosure() {
|
|
let canvasInRendering = new WeakMap();
|
|
|
|
function InternalRenderTask(callback, params, objs, commonObjs, operatorList,
|
|
pageNumber, canvasFactory, webGLContext,
|
|
pdfBug = false) {
|
|
this.callback = callback;
|
|
this.params = params;
|
|
this.objs = objs;
|
|
this.commonObjs = commonObjs;
|
|
this.operatorListIdx = null;
|
|
this.operatorList = operatorList;
|
|
this.pageNumber = pageNumber;
|
|
this.canvasFactory = canvasFactory;
|
|
this.webGLContext = webGLContext;
|
|
this._pdfBug = pdfBug;
|
|
|
|
this.running = false;
|
|
this.graphicsReadyCallback = null;
|
|
this.graphicsReady = false;
|
|
this.useRequestAnimationFrame = false;
|
|
this.cancelled = false;
|
|
this.capability = createPromiseCapability();
|
|
this.task = new RenderTask(this);
|
|
// caching this-bound methods
|
|
this._continueBound = this._continue.bind(this);
|
|
this._scheduleNextBound = this._scheduleNext.bind(this);
|
|
this._nextBound = this._next.bind(this);
|
|
this._canvas = params.canvasContext.canvas;
|
|
}
|
|
|
|
InternalRenderTask.prototype = {
|
|
|
|
initializeGraphics(transparency) {
|
|
if (this.cancelled) {
|
|
return;
|
|
}
|
|
if (this._canvas) {
|
|
if (canvasInRendering.has(this._canvas)) {
|
|
throw new Error(
|
|
'Cannot use the same canvas during multiple render() operations. ' +
|
|
'Use different canvas or ensure previous operations were ' +
|
|
'cancelled or completed.');
|
|
}
|
|
canvasInRendering.set(this._canvas, this);
|
|
}
|
|
|
|
if (this._pdfBug && globalScope.StepperManager &&
|
|
globalScope.StepperManager.enabled) {
|
|
this.stepper = globalScope.StepperManager.create(this.pageNumber - 1);
|
|
this.stepper.init(this.operatorList);
|
|
this.stepper.nextBreakPoint = this.stepper.getNextBreakPoint();
|
|
}
|
|
|
|
var params = this.params;
|
|
this.gfx = new CanvasGraphics(params.canvasContext, this.commonObjs,
|
|
this.objs, this.canvasFactory,
|
|
this.webGLContext, params.imageLayer);
|
|
|
|
this.gfx.beginDrawing({
|
|
transform: params.transform,
|
|
viewport: params.viewport,
|
|
transparency,
|
|
background: params.background,
|
|
});
|
|
this.operatorListIdx = 0;
|
|
this.graphicsReady = true;
|
|
if (this.graphicsReadyCallback) {
|
|
this.graphicsReadyCallback();
|
|
}
|
|
},
|
|
|
|
cancel: function InternalRenderTask_cancel() {
|
|
this.running = false;
|
|
this.cancelled = true;
|
|
if (this._canvas) {
|
|
canvasInRendering.delete(this._canvas);
|
|
}
|
|
this.callback(new RenderingCancelledException(
|
|
'Rendering cancelled, page ' + this.pageNumber, 'canvas'));
|
|
},
|
|
|
|
operatorListChanged: function InternalRenderTask_operatorListChanged() {
|
|
if (!this.graphicsReady) {
|
|
if (!this.graphicsReadyCallback) {
|
|
this.graphicsReadyCallback = this._continueBound;
|
|
}
|
|
return;
|
|
}
|
|
|
|
if (this.stepper) {
|
|
this.stepper.updateOperatorList(this.operatorList);
|
|
}
|
|
|
|
if (this.running) {
|
|
return;
|
|
}
|
|
this._continue();
|
|
},
|
|
|
|
_continue: function InternalRenderTask__continue() {
|
|
this.running = true;
|
|
if (this.cancelled) {
|
|
return;
|
|
}
|
|
if (this.task.onContinue) {
|
|
this.task.onContinue(this._scheduleNextBound);
|
|
} else {
|
|
this._scheduleNext();
|
|
}
|
|
},
|
|
|
|
_scheduleNext: function InternalRenderTask__scheduleNext() {
|
|
if (this.useRequestAnimationFrame && typeof window !== 'undefined') {
|
|
window.requestAnimationFrame(() => {
|
|
this._nextBound().catch(this.callback);
|
|
});
|
|
} else {
|
|
Promise.resolve().then(this._nextBound).catch(this.callback);
|
|
}
|
|
},
|
|
|
|
_next: function InternalRenderTask__next() {
|
|
return new Promise(() => {
|
|
if (this.cancelled) {
|
|
return;
|
|
}
|
|
this.operatorListIdx = this.gfx.executeOperatorList(this.operatorList,
|
|
this.operatorListIdx,
|
|
this._continueBound,
|
|
this.stepper);
|
|
if (this.operatorListIdx === this.operatorList.argsArray.length) {
|
|
this.running = false;
|
|
if (this.operatorList.lastChunk) {
|
|
this.gfx.endDrawing();
|
|
if (this._canvas) {
|
|
canvasInRendering.delete(this._canvas);
|
|
}
|
|
this.callback();
|
|
}
|
|
}
|
|
});
|
|
},
|
|
|
|
};
|
|
|
|
return InternalRenderTask;
|
|
})();
|
|
|
|
var version, build;
|
|
if (typeof PDFJSDev !== 'undefined') {
|
|
version = PDFJSDev.eval('BUNDLE_VERSION');
|
|
build = PDFJSDev.eval('BUNDLE_BUILD');
|
|
}
|
|
|
|
export {
|
|
getDocument,
|
|
LoopbackPort,
|
|
PDFDataRangeTransport,
|
|
PDFWorker,
|
|
PDFDocumentProxy,
|
|
PDFPageProxy,
|
|
setPDFNetworkStreamFactory,
|
|
version,
|
|
build,
|
|
};
|