Move the compatibilityParams into the web/app_options.js file

gulpfile.js

@@ -684,7 +684,7 @@ function buildDefaultPreferences(defines, dir) {
   });
 
   const inputStream = merge([
-    gulp.src(["web/{app_options,viewer_compatibility}.js"], {
+    gulp.src(["web/app_options.js"], {
       base: ".",
     }),
   ]);

web/app.js

@@ -37,7 +37,7 @@ import {
   SpreadMode,
   TextLayerMode,
 } from "./ui_utils.js";
-import { AppOptions, OptionKind } from "./app_options.js";
+import { AppOptions, compatibilityParams, OptionKind } from "./app_options.js";
 import {
   build,
   createPromiseCapability,
@@ -78,7 +78,6 @@ import { PDFThumbnailViewer } from "./pdf_thumbnail_viewer.js";
 import { PDFViewer } from "./pdf_viewer.js";
 import { SecondaryToolbar } from "./secondary_toolbar.js";
 import { Toolbar } from "./toolbar.js";
-import { viewerCompatibilityParams } from "./viewer_compatibility.js";
 import { ViewHistory } from "./view_history.js";
 
 const DEFAULT_SCALE_DELTA = 1.1;
@@ -2484,7 +2483,7 @@ if (typeof PDFJSDev === "undefined" || PDFJSDev.test("GENERIC")) {
     }
     const file = evt.fileInput.files[0];
 
-    if (!viewerCompatibilityParams.disableCreateObjectURL) {
+    if (!compatibilityParams.disableCreateObjectURL) {
       let url = URL.createObjectURL(file);
       if (file.name) {
         url = { url, originalUrl: file.name };

web/app_options.js

@@ -13,7 +13,39 @@
  * limitations under the License.
  */
 
-import { viewerCompatibilityParams } from "./viewer_compatibility.js";
+const compatibilityParams = Object.create(null);
+if (typeof PDFJSDev === "undefined" || PDFJSDev.test("GENERIC")) {
+  const userAgent =
+    (typeof navigator !== "undefined" && navigator.userAgent) || "";
+  const platform =
+    (typeof navigator !== "undefined" && navigator.platform) || "";
+  const maxTouchPoints =
+    (typeof navigator !== "undefined" && navigator.maxTouchPoints) || 1;
+
+  const isAndroid = /Android/.test(userAgent);
+  const isIOS =
+    /\b(iPad|iPhone|iPod)(?=;)/.test(userAgent) ||
+    (platform === "MacIntel" && maxTouchPoints > 1);
+  const isIOSChrome = /CriOS/.test(userAgent);
+
+  // Disables URL.createObjectURL() usage in some environments.
+  // Support: Chrome on iOS
+  (function checkOnBlobSupport() {
+    // Sometimes Chrome on iOS loses data created with createObjectURL(),
+    // see issue 8081.
+    if (isIOSChrome) {
+      compatibilityParams.disableCreateObjectURL = true;
+    }
+  })();
+
+  // Limit canvas size to 5 mega-pixels on mobile.
+  // Support: Android, iOS
+  (function checkCanvasSizeLimitation() {
+    if (isIOS || isAndroid) {
+      compatibilityParams.maxCanvasPixels = 5242880;
+    }
+  })();
+}
 
 const OptionKind = {
   VIEWER: 0x02,
@@ -95,7 +127,7 @@ const defaultOptions = {
   maxCanvasPixels: {
     /** @type {number} */
     value: 16777216,
-    compatibility: viewerCompatibilityParams.maxCanvasPixels,
+    compatibility: compatibilityParams.maxCanvasPixels,
     kind: OptionKind.VIEWER,
   },
   pdfBugEnabled: {
@@ -348,4 +380,4 @@ class AppOptions {
   }
 }
 
-export { AppOptions, OptionKind };
+export { AppOptions, compatibilityParams, OptionKind };

web/download_manager.js

@@ -14,7 +14,7 @@
  */
 
 import { createObjectURL, createValidAbsoluteUrl, isPdfFile } from "pdfjs-lib";
-import { viewerCompatibilityParams } from "./viewer_compatibility.js";
+import { compatibilityParams } from "./app_options.js";
 
 if (typeof PDFJSDev !== "undefined" && !PDFJSDev.test("CHROME || GENERIC")) {
   throw new Error(
@@ -58,7 +58,7 @@ class DownloadManager {
     const blobUrl = createObjectURL(
       data,
       contentType,
-      viewerCompatibilityParams.disableCreateObjectURL
+      compatibilityParams.disableCreateObjectURL
     );
     download(blobUrl, filename);
   }
@@ -70,7 +70,7 @@ class DownloadManager {
     const isPdfData = isPdfFile(filename);
     const contentType = isPdfData ? "application/pdf" : "";
 
-    if (isPdfData && !viewerCompatibilityParams.disableCreateObjectURL) {
+    if (isPdfData && !compatibilityParams.disableCreateObjectURL) {
       let blobUrl = this._openBlobUrls.get(element);
       if (!blobUrl) {
         blobUrl = URL.createObjectURL(new Blob([data], { type: contentType }));
@@ -113,7 +113,7 @@ class DownloadManager {
    *   the "open with" dialog.
    */
   download(blob, url, filename, sourceEventType = "download") {
-    if (viewerCompatibilityParams.disableCreateObjectURL) {
+    if (compatibilityParams.disableCreateObjectURL) {
       // URL.createObjectURL is not supported
       this.downloadUrl(url, filename);
       return;

web/pdf_page_view.js

@@ -27,9 +27,9 @@ import {
   RenderingCancelledException,
   SVGGraphics,
 } from "pdfjs-lib";
+import { compatibilityParams } from "./app_options.js";
 import { NullL10n } from "./l10n_utils.js";
 import { RenderingStates } from "./pdf_rendering_queue.js";
-import { viewerCompatibilityParams } from "./viewer_compatibility.js";
 
 /**
  * @typedef {Object} PDFPageViewOptions
@@ -63,7 +63,7 @@ import { viewerCompatibilityParams } from "./viewer_compatibility.js";
  * @property {IL10n} l10n - Localization service.
  */
 
-const MAX_CANVAS_PIXELS = viewerCompatibilityParams.maxCanvasPixels || 16777216;
+const MAX_CANVAS_PIXELS = compatibilityParams.maxCanvasPixels || 16777216;
 
 /**
  * @implements {IRenderableView}
@@ -819,7 +819,7 @@ class PDFPageView {
       const svgGfx = new SVGGraphics(
         pdfPage.commonObjs,
         pdfPage.objs,
-        /* forceDataSchema = */ viewerCompatibilityParams.disableCreateObjectURL
+        /* forceDataSchema = */ compatibilityParams.disableCreateObjectURL
       );
       return svgGfx.getSVG(opList, actualSizeViewport).then(svg => {
         ensureNotCancelled();

web/pdf_print_service.js

@@ -14,8 +14,8 @@
  */
 
 import { PDFPrintServiceFactory, PDFViewerApplication } from "./app.js";
+import { compatibilityParams } from "./app_options.js";
 import { getXfaHtmlForPrinting } from "./print_utils.js";
-import { viewerCompatibilityParams } from "./viewer_compatibility.js";
 
 let activeService = null;
 let overlayManager = null;
@@ -177,7 +177,7 @@ PDFPrintService.prototype = {
     const scratchCanvas = this.scratchCanvas;
     if (
       "toBlob" in scratchCanvas &&
-      !viewerCompatibilityParams.disableCreateObjectURL
+      !compatibilityParams.disableCreateObjectURL
     ) {
       scratchCanvas.toBlob(function (blob) {
         img.src = URL.createObjectURL(blob);