56a8c934dd
Despite this patch removing the `disableWorker` option itself, please note that we'll still fallback to loading the worker file(s) on the main-thread when running in environments without proper Web Worker support. Furthermore it's still possible, even with this patch, to force the use of fake workers by manually loading the necessary file using a `<script>` tag on the main-thread.[1] That way, the functionality of the now removed `SINGLE_FILE` build target and the resulting `build/pdf.combined.js` file can still be achieved simply by adding e.g. `<script src="build/pdf.worker.js"></script>` to the HTML (obviously with the path adjusted as needed). Finally note that the `disableWorker` option is a performance footgun, and unfortunately many existing third-party examples actually use it without providing any sort of warning/justification. --- [1] This approach is used in the default viewer, since certain kind of debugging may be easier if the code is running directly on the main-thread.
253 lines
8.1 KiB
JavaScript
253 lines
8.1 KiB
JavaScript
/* Copyright 2015 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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import {
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addLinkAttributes, DEFAULT_LINK_REL, getFilenameFromUrl,
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isExternalLinkTargetSet, isValidUrl, LinkTarget
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} from './dom_utils';
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import {
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createBlob, createObjectURL, createPromiseCapability, getVerbosityLevel,
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InvalidPDFException, isLittleEndian, MissingPDFException, OPS, PageViewport,
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PasswordException, PasswordResponses, removeNullCharacters, setVerbosityLevel,
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shadow, UnexpectedResponseException, UnknownErrorException,
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UNSUPPORTED_FEATURES, Util, VERBOSITY_LEVELS
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} from '../shared/util';
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import {
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getDocument, LoopbackPort, PDFDataRangeTransport, PDFWorker
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} from './api';
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import { AnnotationLayer } from './annotation_layer';
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import globalScope from '../shared/global_scope';
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import { Metadata } from './metadata';
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import { renderTextLayer } from './text_layer';
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import { SVGGraphics } from './svg';
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// The global PDFJS object is now deprecated and will not be supported in
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// the future. The members below are maintained for backward compatibility
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// and shall not be extended or modified. If the global.js is included as
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// a module, we will create a global PDFJS object instance or use existing.
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if (!globalScope.PDFJS) {
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globalScope.PDFJS = {};
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}
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var PDFJS = globalScope.PDFJS;
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if (typeof PDFJSDev !== 'undefined') {
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PDFJS.version = PDFJSDev.eval('BUNDLE_VERSION');
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PDFJS.build = PDFJSDev.eval('BUNDLE_BUILD');
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}
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PDFJS.pdfBug = false;
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if (PDFJS.verbosity !== undefined) {
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setVerbosityLevel(PDFJS.verbosity);
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}
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delete PDFJS.verbosity;
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Object.defineProperty(PDFJS, 'verbosity', {
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get() {
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return getVerbosityLevel();
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},
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set(level) {
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setVerbosityLevel(level);
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},
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enumerable: true,
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configurable: true,
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});
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PDFJS.VERBOSITY_LEVELS = VERBOSITY_LEVELS;
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PDFJS.OPS = OPS;
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PDFJS.UNSUPPORTED_FEATURES = UNSUPPORTED_FEATURES;
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PDFJS.isValidUrl = isValidUrl;
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PDFJS.shadow = shadow;
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PDFJS.createBlob = createBlob;
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PDFJS.createObjectURL = function PDFJS_createObjectURL(data, contentType) {
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return createObjectURL(data, contentType, PDFJS.disableCreateObjectURL);
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};
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Object.defineProperty(PDFJS, 'isLittleEndian', {
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configurable: true,
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get: function PDFJS_isLittleEndian() {
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return shadow(PDFJS, 'isLittleEndian', isLittleEndian());
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},
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});
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PDFJS.removeNullCharacters = removeNullCharacters;
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PDFJS.PasswordResponses = PasswordResponses;
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PDFJS.PasswordException = PasswordException;
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PDFJS.UnknownErrorException = UnknownErrorException;
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PDFJS.InvalidPDFException = InvalidPDFException;
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PDFJS.MissingPDFException = MissingPDFException;
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PDFJS.UnexpectedResponseException = UnexpectedResponseException;
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PDFJS.Util = Util;
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PDFJS.PageViewport = PageViewport;
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PDFJS.createPromiseCapability = createPromiseCapability;
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/**
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* The maximum allowed image size in total pixels e.g. width * height. Images
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* above this value will not be drawn. Use -1 for no limit.
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* @var {number}
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*/
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PDFJS.maxImageSize = (PDFJS.maxImageSize === undefined ?
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-1 : PDFJS.maxImageSize);
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/**
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* The url of where the predefined Adobe CMaps are located. Include trailing
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* slash.
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* @var {string}
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*/
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PDFJS.cMapUrl = (PDFJS.cMapUrl === undefined ? null : PDFJS.cMapUrl);
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/**
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* Specifies if CMaps are binary packed.
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* @var {boolean}
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*/
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PDFJS.cMapPacked = PDFJS.cMapPacked === undefined ? false : PDFJS.cMapPacked;
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/**
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* By default fonts are converted to OpenType fonts and loaded via font face
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* rules. If disabled, the font will be rendered using a built in font
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* renderer that constructs the glyphs with primitive path commands.
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* @var {boolean}
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*/
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PDFJS.disableFontFace = (PDFJS.disableFontFace === undefined ?
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false : PDFJS.disableFontFace);
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/**
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* Path for image resources, mainly for annotation icons. Include trailing
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* slash.
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* @var {string}
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*/
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PDFJS.imageResourcesPath = (PDFJS.imageResourcesPath === undefined ?
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'' : PDFJS.imageResourcesPath);
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/**
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* Path and filename of the worker file. Required when the worker is enabled
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* in development mode. If unspecified in the production build, the worker
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* will be loaded based on the location of the pdf.js file. It is recommended
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* that the workerSrc is set in a custom application to prevent issues caused
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* by third-party frameworks and libraries.
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* @var {string}
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*/
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PDFJS.workerSrc = (PDFJS.workerSrc === undefined ? null : PDFJS.workerSrc);
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/**
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* Defines global port for worker process. Overrides `workerSrc` setting.
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*/
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PDFJS.workerPort = (PDFJS.workerPort === undefined ? null : PDFJS.workerPort);
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/**
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* Disable range request loading of PDF files. When enabled and if the server
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* supports partial content requests then the PDF will be fetched in chunks.
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* Enabled (false) by default.
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* @var {boolean}
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*/
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PDFJS.disableRange = (PDFJS.disableRange === undefined ?
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false : PDFJS.disableRange);
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/**
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* Disable streaming of PDF file data. By default PDF.js attempts to load PDF
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* in chunks. This default behavior can be disabled.
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* @var {boolean}
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*/
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PDFJS.disableStream = (PDFJS.disableStream === undefined ?
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false : PDFJS.disableStream);
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/**
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* Disable pre-fetching of PDF file data. When range requests are enabled
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* PDF.js will automatically keep fetching more data even if it isn't needed
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* to display the current page. This default behavior can be disabled.
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*
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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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* @var {boolean}
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*/
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PDFJS.disableAutoFetch = (PDFJS.disableAutoFetch === undefined ?
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false : PDFJS.disableAutoFetch);
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/**
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* Enables special hooks for debugging PDF.js.
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* @var {boolean}
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*/
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PDFJS.pdfBug = (PDFJS.pdfBug === undefined ? false : PDFJS.pdfBug);
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/**
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* Enables transfer usage in postMessage for ArrayBuffers.
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* @var {boolean}
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*/
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PDFJS.postMessageTransfers = (PDFJS.postMessageTransfers === undefined ?
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true : PDFJS.postMessageTransfers);
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/**
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* Disables URL.createObjectURL usage.
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* @var {boolean}
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*/
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PDFJS.disableCreateObjectURL = (PDFJS.disableCreateObjectURL === undefined ?
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false : PDFJS.disableCreateObjectURL);
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/**
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* Disables WebGL usage.
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* @var {boolean}
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*/
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PDFJS.disableWebGL = (PDFJS.disableWebGL === undefined ?
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true : PDFJS.disableWebGL);
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/**
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* Specifies the |target| attribute for external links.
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* The constants from PDFJS.LinkTarget should be used:
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* - NONE [default]
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* - SELF
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* - BLANK
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* - PARENT
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* - TOP
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* @var {number}
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*/
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PDFJS.externalLinkTarget = (PDFJS.externalLinkTarget === undefined ?
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LinkTarget.NONE : PDFJS.externalLinkTarget);
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/**
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* Specifies the |rel| attribute for external links. Defaults to stripping
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* the referrer.
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* @var {string}
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*/
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PDFJS.externalLinkRel = (PDFJS.externalLinkRel === undefined ?
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DEFAULT_LINK_REL : PDFJS.externalLinkRel);
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/**
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* Determines if we can eval strings as JS. Primarily used to improve
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* performance for font rendering.
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* @var {boolean}
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*/
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PDFJS.isEvalSupported = (PDFJS.isEvalSupported === undefined ?
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true : PDFJS.isEvalSupported);
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PDFJS.getDocument = getDocument;
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PDFJS.LoopbackPort = LoopbackPort;
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PDFJS.PDFDataRangeTransport = PDFDataRangeTransport;
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PDFJS.PDFWorker = PDFWorker;
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PDFJS.LinkTarget = LinkTarget;
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PDFJS.addLinkAttributes = addLinkAttributes;
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PDFJS.getFilenameFromUrl = getFilenameFromUrl;
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PDFJS.isExternalLinkTargetSet = isExternalLinkTargetSet;
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PDFJS.AnnotationLayer = AnnotationLayer;
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PDFJS.renderTextLayer = renderTextLayer;
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PDFJS.Metadata = Metadata;
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PDFJS.SVGGraphics = SVGGraphics;
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export {
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globalScope,
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PDFJS,
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};
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