87b002c52f
This patch purposely starts small, by removing IE-specific code from various JS/CSS files in the `web/` folder. There's obviously lots of potential for additional clean-up, especially the removal of no longer necessary polyfills in `src/shared/compatibility.js`, however that will require some care considering that certain polyfills may also be necessary for e.g. Node.js or the Chromium-extension as well. Generally speaking, once we start removing polyfills it's probably a good idea to consult the compatibility information on https://developer.mozilla.org/ and also https://caniuse.com/ first. (Deciding on the lowest supported Chromium version, for the extension, would also seem like a good idea.)
52 lines
1.8 KiB
JavaScript
52 lines
1.8 KiB
JavaScript
/* Copyright 2018 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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const compatibilityParams = Object.create(null);
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if (typeof PDFJSDev === "undefined" || PDFJSDev.test("GENERIC")) {
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const userAgent =
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(typeof navigator !== "undefined" && navigator.userAgent) || "";
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const platform =
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(typeof navigator !== "undefined" && navigator.platform) || "";
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const maxTouchPoints =
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(typeof navigator !== "undefined" && navigator.maxTouchPoints) || 1;
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const isAndroid = /Android/.test(userAgent);
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const isIOS =
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/\b(iPad|iPhone|iPod)(?=;)/.test(userAgent) ||
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(platform === "MacIntel" && maxTouchPoints > 1);
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const isIOSChrome = /CriOS/.test(userAgent);
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// Checks if possible to use URL.createObjectURL()
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// Support: IE, Chrome on iOS
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(function checkOnBlobSupport() {
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// Sometimes Chrome on iOS loses data created with createObjectURL(),
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// see issue #8081.
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if (isIOSChrome) {
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compatibilityParams.disableCreateObjectURL = true;
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}
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})();
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// Limit canvas size to 5 mega-pixels on mobile.
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// Support: Android, iOS
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(function checkCanvasSizeLimitation() {
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if (isIOS || isAndroid) {
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compatibilityParams.maxCanvasPixels = 5242880;
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}
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})();
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}
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const viewerCompatibilityParams = Object.freeze(compatibilityParams);
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export { viewerCompatibilityParams };
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