[api-major] Remove the SINGLE_FILE build target

Please note that this build target, and the resulting `build/pdf.combined.js` file, is equivalent to setting the `PDFJS.disableWorker` option to `true` which is a performance footgun.

gulpfile.js

@@ -48,7 +48,6 @@ var BASELINE_DIR = BUILD_DIR + 'baseline/';
 var MOZCENTRAL_BASELINE_DIR = BUILD_DIR + 'mozcentral.baseline/';
 var GENERIC_DIR = BUILD_DIR + 'generic/';
 var COMPONENTS_DIR = BUILD_DIR + 'components/';
-var SINGLE_FILE_DIR = BUILD_DIR + 'singlefile/';
 var MINIFIED_DIR = BUILD_DIR + 'minified/';
 var FIREFOX_BUILD_DIR = BUILD_DIR + 'firefox/';
 var CHROME_BUILD_DIR = BUILD_DIR + 'chromium/';
@@ -79,7 +78,6 @@ var DEFINES = {
   MOZCENTRAL: false,
   CHROME: false,
   MINIFIED: false,
-  SINGLE_FILE: false,
   COMPONENTS: false,
   LIB: false,
   SKIP_BABEL: false,
@@ -235,10 +233,6 @@ function createBundle(defines) {
 
   var mainAMDName = 'pdfjs-dist/build/pdf';
   var mainOutputName = 'pdf.js';
-  if (defines.SINGLE_FILE) {
-    mainAMDName = 'pdfjs-dist/build/pdf.combined';
-    mainOutputName = 'pdf.combined.js';
-  }
 
   var mainFileConfig = createWebpackConfig(defines, {
     filename: mainOutputName,
@@ -250,9 +244,6 @@ function createBundle(defines) {
     .pipe(webpack2Stream(mainFileConfig))
     .pipe(replaceWebpackRequire())
     .pipe(replaceJSRootName(mainAMDName));
-  if (defines.SINGLE_FILE) {
-    return mainOutput; // don't need a worker file.
-  }
 
   var workerAMDName = 'pdfjs-dist/build/pdf.worker';
   var workerOutputName = 'pdf.worker.js';
@@ -634,18 +625,6 @@ gulp.task('components', ['buildnumber'], function () {
   ]);
 });
 
-gulp.task('singlefile', ['buildnumber'], function () {
-  console.log();
-  console.log('### Creating singlefile build');
-  var defines = builder.merge(DEFINES, { SINGLE_FILE: true, });
-
-  var SINGLE_FILE_BUILD_DIR = SINGLE_FILE_DIR + 'build/';
-
-  rimraf.sync(SINGLE_FILE_DIR);
-
-  return createBundle(defines).pipe(gulp.dest(SINGLE_FILE_BUILD_DIR));
-});
-
 gulp.task('minified-pre', ['buildnumber', 'locale'], function () {
   console.log();
   console.log('### Creating minified viewer');
@@ -1275,9 +1254,7 @@ gulp.task('gh-pages-git', ['gh-pages-prepare', 'wintersmith'], function () {
 
 gulp.task('web', ['gh-pages-prepare', 'wintersmith', 'gh-pages-git']);
 
-gulp.task('dist-pre',
-          ['generic', 'singlefile', 'components', 'lib', 'minified'],
-          function () {
+gulp.task('dist-pre', ['generic', 'components', 'lib', 'minified'], function() {
   var VERSION = getVersionJSON().version;
 
   console.log();
@@ -1359,8 +1336,6 @@ gulp.task('dist-pre',
       GENERIC_DIR + 'build/pdf.js.map',
       GENERIC_DIR + 'build/pdf.worker.js',
       GENERIC_DIR + 'build/pdf.worker.js.map',
-      SINGLE_FILE_DIR + 'build/pdf.combined.js',
-      SINGLE_FILE_DIR + 'build/pdf.combined.js.map',
       SRC_DIR + 'pdf.worker.entry.js',
     ]).pipe(gulp.dest(DIST_DIR + 'build/')),
     gulp.src(MINIFIED_DIR + 'build/pdf.js')

src/display/api.js

@@ -46,8 +46,7 @@ var pdfjsFilePath =
 
 var fakeWorkerFilesLoader = null;
 var useRequireEnsure = false;
-if (typeof PDFJSDev !== 'undefined' &&
-    PDFJSDev.test('GENERIC && !SINGLE_FILE')) {
+if (typeof PDFJSDev !== 'undefined' && PDFJSDev.test('GENERIC')) {
   // For GENERIC build we need add support of different fake file loaders
   // for different  frameworks.
   if (typeof window === 'undefined') {
@@ -1243,10 +1242,6 @@ var PDFWorker = (function PDFWorkerClosure() {
         throw new Error(
           'SystemJS or CommonJS must be used to load fake worker.');
       }
-    } else if (PDFJSDev.test('SINGLE_FILE')) {
-      var pdfjsCoreWorker = require('../core/worker.js');
-      WorkerMessageHandler = pdfjsCoreWorker.WorkerMessageHandler;
-      fakeWorkerFilesLoadedCapability.resolve(WorkerMessageHandler);
     } else {
       var loader = fakeWorkerFilesLoader || function (callback) {
         Util.loadScript(getWorkerSrc(), function () {
@@ -1320,9 +1315,8 @@ var PDFWorker = (function PDFWorkerClosure() {
       // 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 PDFJSDev === 'undefined' || !PDFJSDev.test('SINGLE_FILE')) &&
-          !isWorkerDisabled && !getDefaultSetting('disableWorker') &&
-          typeof Worker !== 'undefined') {
+      if (typeof Worker !== 'undefined' && !isWorkerDisabled &&
+          !getDefaultSetting('disableWorker')) {
         var workerSrc = getWorkerSrc();
 
         try {

src/display/svg.js

@@ -25,8 +25,7 @@ var SVGGraphics = function() {
   throw new Error('Not implemented: SVGGraphics');
 };
 
-if (typeof PDFJSDev === 'undefined' ||
-    PDFJSDev.test('GENERIC || SINGLE_FILE')) {
+if (typeof PDFJSDev === 'undefined' || PDFJSDev.test('GENERIC')) {
 
 var SVG_DEFAULTS = {
   fontStyle: 'normal',

src/pdf.js

@@ -29,8 +29,7 @@ var pdfjsDisplayAnnotationLayer = require('./display/annotation_layer.js');
 var pdfjsDisplayDOMUtils = require('./display/dom_utils.js');
 var pdfjsDisplaySVG = require('./display/svg.js');
 
-if (typeof PDFJSDev === 'undefined' ||
-    !PDFJSDev.test('FIREFOX || MOZCENTRAL || CHROME')) {
+if (typeof PDFJSDev === 'undefined' || PDFJSDev.test('GENERIC')) {
   const isNodeJS = require('./shared/is_node.js');
   if (isNodeJS()) {
     let PDFNodeStream = require('./display/node_stream.js').PDFNodeStream;
@@ -43,7 +42,7 @@ if (typeof PDFJSDev === 'undefined' ||
     pdfjsDisplayAPI.setPDFNetworkStreamFactory((params) => {
       return new PDFFetchStream(params);
     });
-   } else {
+  } else {
     let PDFNetworkStream = require('./display/network.js').PDFNetworkStream;
     pdfjsDisplayAPI.setPDFNetworkStreamFactory((params) => {
       return new PDFNetworkStream(params);