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Merge pull request #7841 from timvandermeij/ios-range

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Compatibility: disable range requests for iOS and refactor user agent detection
This commit is contained in:
Jonas Jenwald 2016-11-22 22:53:36 +01:00 committed by GitHub
commit ef7fd75a94
1 changed files with 32 additions and 29 deletions
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61
web/compatibility.js
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@ -17,6 +17,19 @@
(function compatibilityWrapper() {
'use strict';
var userAgent = navigator.userAgent;
var isAndroid = /Android/.test(userAgent);
var isAndroidPre3 = /Android\s[0-2][^\d]/.test(userAgent);
var isAndroidPre5 = /Android\s[0-4][^\d]/.test(userAgent);
var isChrome = userAgent.indexOf('Chrom') >= 0;
var isChromeWithRangeBug = /Chrome\/(39|40)\./.test(userAgent);
var isIE = userAgent.indexOf('Trident') >= 0;
var isIOS = /\b(iPad|iPhone|iPod)(?=;)/.test(userAgent);
var isOpera = userAgent.indexOf('Opera') >= 0;
var isSafari = /Safari\//.test(userAgent) &&
!/(Chrome\/|Android\s)/.test(userAgent);
// Initializing PDFJS global object here, it case if we need to change/disable
// some PDF.js features, e.g. range requests
if (typeof PDFJS === 'undefined') {
@ -29,12 +42,12 @@ if (typeof PDFJS === 'undefined') {
if (typeof Uint8Array !== 'undefined') {
// Support: iOS<6.0
if (typeof Uint8Array.prototype.subarray === 'undefined') {
Uint8Array.prototype.subarray = function subarray(start, end) {
return new Uint8Array(this.slice(start, end));
};
Float32Array.prototype.subarray = function subarray(start, end) {
return new Float32Array(this.slice(start, end));
};
Uint8Array.prototype.subarray = function subarray(start, end) {
return new Uint8Array(this.slice(start, end));
};
Float32Array.prototype.subarray = function subarray(start, end) {
return new Float32Array(this.slice(start, end));
};
}
// Support: Android<4.1
@ -429,7 +442,7 @@ if (typeof PDFJS === 'undefined') {
function isDisabled(node) {
return node.disabled || (node.parentNode && isDisabled(node.parentNode));
}
if (navigator.userAgent.indexOf('Opera') !== -1) {
if (isOpera) {
// use browser detection since we cannot feature-check this bug
document.addEventListener('click', ignoreIfTargetDisabled, true);
}
@ -439,7 +452,7 @@ if (typeof PDFJS === 'undefined') {
// Support: IE
(function checkOnBlobSupport() {
// sometimes IE loosing the data created with createObjectURL(), see #3977
if (navigator.userAgent.indexOf('Trident') >= 0) {
if (isIE) {
PDFJS.disableCreateObjectURL = true;
}
})();
@ -452,25 +465,19 @@ if (typeof PDFJS === 'undefined') {
PDFJS.locale = navigator.userLanguage || 'en-US';
})();
// Support: Safari 6.0+, Android<3.0, Chrome 39/40, iOS
(function checkRangeRequests() {
// Safari has issues with cached range requests see:
// https://github.com/mozilla/pdf.js/issues/3260
// Last tested with version 6.0.4.
// Support: Safari 6.0+
var isSafari = /Safari\//.test(navigator.userAgent) &&
!/(Chrome\/|Android\s)/.test(navigator.userAgent);
// Older versions of Android (pre 3.0) has issues with range requests, see:
// https://github.com/mozilla/pdf.js/issues/3381.
// Make sure that we only match webkit-based Android browsers,
// since Firefox/Fennec works as expected.
// Support: Android<3.0
var isOldAndroid = /Android\s[0-2][^\d]/.test(navigator.userAgent);
// Range requests are broken in Chrome 39 and 40, https://crbug.com/442318
var isChromeWithRangeBug = /Chrome\/(39|40)\./.test(navigator.userAgent);
if (isSafari || isOldAndroid || isChromeWithRangeBug) {
if (isSafari || isAndroidPre3 || isChromeWithRangeBug || isIOS) {
PDFJS.disableRange = true;
PDFJS.disableStream = true;
}
@ -482,7 +489,7 @@ if (typeof PDFJS === 'undefined') {
// Android 2.x has so buggy pushState support that it was removed in
// Android 3.0 and restored as late as in Android 4.2.
// Support: Android 2.x
if (!history.pushState || navigator.userAgent.indexOf('Android 2.') >= 0) {
if (!history.pushState || isAndroidPre3) {
PDFJS.disableHistory = true;
}
})();
@ -502,17 +509,17 @@ if (typeof PDFJS === 'undefined') {
// Old Chrome and Android use an inaccessible CanvasPixelArray prototype.
// Because we cannot feature detect it, we rely on user agent parsing.
var polyfill = false, versionMatch;
if (navigator.userAgent.indexOf('Chrom') >= 0) {
versionMatch = navigator.userAgent.match(/Chrom(e|ium)\/([0-9]+)\./);
if (isChrome) {
versionMatch = userAgent.match(/Chrom(e|ium)\/([0-9]+)\./);
// Chrome < 21 lacks the set function.
polyfill = versionMatch && parseInt(versionMatch[2]) < 21;
} else if (navigator.userAgent.indexOf('Android') >= 0) {
} else if (isAndroid) {
// Android < 4.4 lacks the set function.
// Android >= 4.4 will contain Chrome in the user agent,
// thus pass the Chrome check above and not reach this block.
polyfill = /Android\s[0-4][^\d]/g.test(navigator.userAgent);
} else if (navigator.userAgent.indexOf('Safari') >= 0) {
versionMatch = navigator.userAgent.
polyfill = isAndroidPre5;
} else if (isSafari) {
versionMatch = userAgent.
match(/Version\/([0-9]+)\.([0-9]+)\.([0-9]+) Safari\//);
// Safari < 6 lacks the set function.
polyfill = versionMatch && parseInt(versionMatch[1]) < 6;
@ -542,7 +549,6 @@ if (typeof PDFJS === 'undefined') {
window.setTimeout(callback, 20);
}
var isIOS = /(iPad|iPhone|iPod)/g.test(navigator.userAgent);
if (isIOS) {
// requestAnimationFrame on iOS is broken, replacing with fake one.
window.requestAnimationFrame = fakeRequestAnimationFrame;
@ -557,9 +563,8 @@ if (typeof PDFJS === 'undefined') {
fakeRequestAnimationFrame;
})();
// Support: Android, iOS
(function checkCanvasSizeLimitation() {
var isIOS = /(iPad|iPhone|iPod)/g.test(navigator.userAgent);
var isAndroid = /Android/g.test(navigator.userAgent);
if (isIOS || isAndroid) {
// 5MP
PDFJS.maxCanvasPixels = 5242880;
@ -569,9 +574,7 @@ if (typeof PDFJS === 'undefined') {
// Disable fullscreen support for certain problematic configurations.
// Support: IE11+ (when embedded).
(function checkFullscreenSupport() {
var isEmbeddedIE = (navigator.userAgent.indexOf('Trident') >= 0 &&
window.parent !== window);
if (isEmbeddedIE) {
if (isIE && window.parent !== window) {
PDFJS.disableFullscreen = true;
}
})();