| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 | /* Copyright 2016 Mozilla Foundation * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ /* globals PDFJS */ 'use strict'; if (!PDFJS.PDFViewer || !PDFJS.getDocument) { alert('Please build the pdfjs-dist library using\n' + ' `gulp dist-install`'); } PDFJS.useOnlyCssZoom = true; PDFJS.disableTextLayer = true; PDFJS.maxImageSize = 1024 * 1024; PDFJS.workerSrc = '../../node_modules/pdfjs-dist/build/pdf.worker.js'; PDFJS.cMapUrl = '../../node_modules/pdfjs-dist/cmaps/'; PDFJS.cMapPacked = true; var DEFAULT_URL = '../../web/compressed.tracemonkey-pldi-09.pdf'; var DEFAULT_SCALE_DELTA = 1.1; var MIN_SCALE = 0.25; var MAX_SCALE = 10.0; var DEFAULT_SCALE_VALUE = 'auto'; var PDFViewerApplication = { pdfLoadingTask: null, pdfDocument: null, pdfViewer: null, pdfHistory: null, pdfLinkService: null, /** * Opens PDF document specified by URL. * @returns {Promise} - Returns the promise, which is resolved when document * is opened. */ open: function (params) { if (this.pdfLoadingTask) { // We need to destroy already opened document return this.close().then(function () { // ... and repeat the open() call. return this.open(params); }.bind(this)); } var url = params.url; var self = this; this.setTitleUsingUrl(url); // Loading document. var loadingTask = PDFJS.getDocument(url); this.pdfLoadingTask = loadingTask; loadingTask.onProgress = function (progressData) { self.progress(progressData.loaded / progressData.total); }; return loadingTask.promise.then(function (pdfDocument) { // Document loaded, specifying document for the viewer. self.pdfDocument = pdfDocument; self.pdfViewer.setDocument(pdfDocument); self.pdfLinkService.setDocument(pdfDocument); self.pdfHistory.initialize(pdfDocument.fingerprint); self.loadingBar.hide(); self.setTitleUsingMetadata(pdfDocument); }, function (exception) { var message = exception && exception.message; var l10n = self.l10n; var loadingErrorMessage; if (exception instanceof PDFJS.InvalidPDFException) { // change error message also for other builds loadingErrorMessage = l10n.get('invalid_file_error', null, 'Invalid or corrupted PDF file.'); } else if (exception instanceof PDFJS.MissingPDFException) { // special message for missing PDFs loadingErrorMessage = l10n.get('missing_file_error', null, 'Missing PDF file.'); } else if (exception instanceof PDFJS.UnexpectedResponseException) { loadingErrorMessage = l10n.get('unexpected_response_error', null, 'Unexpected server response.'); } else { loadingErrorMessage = l10n.get('loading_error', null, 'An error occurred while loading the PDF.'); } loadingErrorMessage.then(function (msg) { self.error(msg, {message: message}); }); self.loadingBar.hide(); }); }, /** * Closes opened PDF document. * @returns {Promise} - Returns the promise, which is resolved when all * destruction is completed. */ close: function () { var errorWrapper = document.getElementById('errorWrapper'); errorWrapper.setAttribute('hidden', 'true'); if (!this.pdfLoadingTask) { return Promise.resolve(); } var promise = this.pdfLoadingTask.destroy(); this.pdfLoadingTask = null; if (this.pdfDocument) { this.pdfDocument = null; this.pdfViewer.setDocument(null); this.pdfLinkService.setDocument(null, null); } return promise; }, get loadingBar() { var bar = new PDFJS.ProgressBar('#loadingBar', {}); return PDFJS.shadow(this, 'loadingBar', bar); }, setTitleUsingUrl: function pdfViewSetTitleUsingUrl(url) { this.url = url; var title = PDFJS.getFilenameFromUrl(url) || url; try { title = decodeURIComponent(title); } catch (e) { // decodeURIComponent may throw URIError, // fall back to using the unprocessed url in that case } this.setTitle(title); }, setTitleUsingMetadata: function (pdfDocument) { var self = this; pdfDocument.getMetadata().then(function(data) { var info = data.info, metadata = data.metadata; self.documentInfo = info; self.metadata = metadata; // Provides some basic debug information console.log('PDF ' + pdfDocument.fingerprint + ' [' + info.PDFFormatVersion + ' ' + (info.Producer || '-').trim() + ' / ' + (info.Creator || '-').trim() + ']' + ' (PDF.js: ' + (PDFJS.version || '-') + (!PDFJS.disableWebGL ? ' [WebGL]' : '') + ')'); var pdfTitle; if (metadata && metadata.has('dc:title')) { var title = metadata.get('dc:title'); // Ghostscript sometimes returns 'Untitled', so prevent setting the // title to 'Untitled. if (title !== 'Untitled') { pdfTitle = title; } } if (!pdfTitle && info && info['Title']) { pdfTitle = info['Title']; } if (pdfTitle) { self.setTitle(pdfTitle + ' - ' + document.title); } }); }, setTitle: function pdfViewSetTitle(title) { document.title = title; document.getElementById('title').textContent = title; }, error: function pdfViewError(message, moreInfo) { var l10n = this.l10n; var moreInfoText = [l10n.get('error_version_info', {version: PDFJS.version || '?', build: PDFJS.build || '?'}, 'PDF.js v{{version}} (build: {{build}})')]; if (moreInfo) { moreInfoText.push( l10n.get('error_message', {message: moreInfo.message}, 'Message: {{message}}')); if (moreInfo.stack) { moreInfoText.push( l10n.get('error_stack', {stack: moreInfo.stack}, 'Stack: {{stack}}')); } else { if (moreInfo.filename) { moreInfoText.push( l10n.get('error_file', {file: moreInfo.filename}, 'File: {{file}}')); } if (moreInfo.lineNumber) { moreInfoText.push( l10n.get('error_line', {line: moreInfo.lineNumber}, 'Line: {{line}}')); } } } var errorWrapper = document.getElementById('errorWrapper'); errorWrapper.removeAttribute('hidden'); var errorMessage = document.getElementById('errorMessage'); errorMessage.textContent = message; var closeButton = document.getElementById('errorClose'); closeButton.onclick = function() { errorWrapper.setAttribute('hidden', 'true'); }; var errorMoreInfo = document.getElementById('errorMoreInfo'); var moreInfoButton = document.getElementById('errorShowMore'); var lessInfoButton = document.getElementById('errorShowLess'); moreInfoButton.onclick = function() { errorMoreInfo.removeAttribute('hidden'); moreInfoButton.setAttribute('hidden', 'true'); lessInfoButton.removeAttribute('hidden'); errorMoreInfo.style.height = errorMoreInfo.scrollHeight + 'px'; }; lessInfoButton.onclick = function() { errorMoreInfo.setAttribute('hidden', 'true'); moreInfoButton.removeAttribute('hidden'); lessInfoButton.setAttribute('hidden', 'true'); }; moreInfoButton.removeAttribute('hidden'); lessInfoButton.setAttribute('hidden', 'true'); Promise.all(moreInfoText).then(function (parts) { errorMoreInfo.value = parts.join('\n'); }); }, progress: function pdfViewProgress(level) { var percent = Math.round(level * 100); // Updating the bar if value increases. if (percent > this.loadingBar.percent || isNaN(percent)) { this.loadingBar.percent = percent; } }, get pagesCount() { return this.pdfDocument.numPages; }, set page(val) { this.pdfViewer.currentPageNumber = val; }, get page() { return this.pdfViewer.currentPageNumber; }, zoomIn: function pdfViewZoomIn(ticks) { var newScale = this.pdfViewer.currentScale; do { newScale = (newScale * DEFAULT_SCALE_DELTA).toFixed(2); newScale = Math.ceil(newScale * 10) / 10; newScale = Math.min(MAX_SCALE, newScale); } while (--ticks && newScale < MAX_SCALE); this.pdfViewer.currentScaleValue = newScale; }, zoomOut: function pdfViewZoomOut(ticks) { var newScale = this.pdfViewer.currentScale; do { newScale = (newScale / DEFAULT_SCALE_DELTA).toFixed(2); newScale = Math.floor(newScale * 10) / 10; newScale = Math.max(MIN_SCALE, newScale); } while (--ticks && newScale > MIN_SCALE); this.pdfViewer.currentScaleValue = newScale; }, initUI: function pdfViewInitUI() { var linkService = new PDFJS.PDFLinkService(); this.pdfLinkService = linkService; this.l10n = PDFJS.NullL10n; var container = document.getElementById('viewerContainer'); var pdfViewer = new PDFJS.PDFViewer({ container: container, linkService: linkService, l10n: this.l10n, }); this.pdfViewer = pdfViewer; linkService.setViewer(pdfViewer); this.pdfHistory = new PDFJS.PDFHistory({ linkService: linkService }); linkService.setHistory(this.pdfHistory); document.getElementById('previous').addEventListener('click', function() { PDFViewerApplication.page--; }); document.getElementById('next').addEventListener('click', function() { PDFViewerApplication.page++; }); document.getElementById('zoomIn').addEventListener('click', function() { PDFViewerApplication.zoomIn(); }); document.getElementById('zoomOut').addEventListener('click', function() { PDFViewerApplication.zoomOut(); }); document.getElementById('pageNumber').addEventListener('click', function() { this.select(); }); document.getElementById('pageNumber').addEventListener('change', function() { PDFViewerApplication.page = (this.value | 0); // Ensure that the page number input displays the correct value, even if the // value entered by the user was invalid (e.g. a floating point number). if (this.value !== PDFViewerApplication.page.toString()) { this.value = PDFViewerApplication.page; } }); container.addEventListener('pagesinit', function () { // We can use pdfViewer now, e.g. let's change default scale. pdfViewer.currentScaleValue = DEFAULT_SCALE_VALUE; }); container.addEventListener('pagechange', function (evt) { var page = evt.pageNumber; var numPages = PDFViewerApplication.pagesCount; document.getElementById('pageNumber').value = page; document.getElementById('previous').disabled = (page <= 1); document.getElementById('next').disabled = (page >= numPages); }, true); } }; document.addEventListener('DOMContentLoaded', function () { PDFViewerApplication.initUI(); }, true); (function animationStartedClosure() { // The offsetParent is not set until the PDF.js iframe or object is visible. // Waiting for first animation. PDFViewerApplication.animationStartedPromise = new Promise( function (resolve) { window.requestAnimationFrame(resolve); }); })(); // We need to delay opening until all HTML is loaded. PDFViewerApplication.animationStartedPromise.then(function () { PDFViewerApplication.open({ url: DEFAULT_URL }); }); |