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Merge pull request #9294 from Snuffleupagus/rm-more-polyfills

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Remove even more polyfills for old, and now unsupported, browsers
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Tim van der Meij 2017-12-20 22:15:47 +01:00 committed by GitHub
commit e081a708c3
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1 changed files with 0 additions and 203 deletions
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src/shared/compatibility.js
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@ -25,8 +25,6 @@ var globalScope = require('./global_scope');
var userAgent = (typeof navigator !== 'undefined' && navigator.userAgent) || '';
var isAndroid = /Android/.test(userAgent);
var isAndroidPre5 = /Android\s[0-4][^\d]/.test(userAgent);
var isChrome = userAgent.indexOf('Chrom') >= 0;
var isIOSChrome = userAgent.indexOf('CriOS') >= 0;
var isIE = userAgent.indexOf('Trident') >= 0;
var isIOS = /\b(iPad|iPhone|iPod)(?=;)/.test(userAgent);
@ -43,105 +41,6 @@ if (typeof PDFJS === 'undefined') {
PDFJS.compatibilityChecked = true;
// URL = URL || webkitURL
// Support: Safari<7, Android 4.2+
(function normalizeURLObject() {
if (!globalScope.URL) {
globalScope.URL = globalScope.webkitURL;
}
})();
// No XMLHttpRequest#response?
// Support: IE<11, Android <4.0
(function checkXMLHttpRequestResponseCompatibility() {
if (typeof XMLHttpRequest === 'undefined') {
return;
}
var xhrPrototype = XMLHttpRequest.prototype;
var xhr = new XMLHttpRequest();
if (!('overrideMimeType' in xhr)) {
// IE10 might have response, but not overrideMimeType
// Support: IE10
Object.defineProperty(xhrPrototype, 'overrideMimeType', {
value: function xmlHttpRequestOverrideMimeType(mimeType) {},
});
}
if ('responseType' in xhr) {
return;
}
Object.defineProperty(xhrPrototype, 'responseType', {
get: function xmlHttpRequestGetResponseType() {
return this._responseType || 'text';
},
set: function xmlHttpRequestSetResponseType(value) {
if (value === 'text' || value === 'arraybuffer') {
this._responseType = value;
if (value === 'arraybuffer' &&
typeof this.overrideMimeType === 'function') {
this.overrideMimeType('text/plain; charset=x-user-defined');
}
}
},
});
Object.defineProperty(xhrPrototype, 'response', {
get: function xmlHttpRequestResponseGet() {
if (this.responseType !== 'arraybuffer') {
return this.responseText;
}
var text = this.responseText;
var i, n = text.length;
var result = new Uint8Array(n);
for (i = 0; i < n; ++i) {
result[i] = text.charCodeAt(i) & 0xFF;
}
return result.buffer;
},
});
})();
// HTMLElement dataset property
// Support: IE<11, Safari<5.1, Android<4.0
(function checkDatasetProperty() {
if (!hasDOM) {
return;
}
var div = document.createElement('div');
if ('dataset' in div) {
return; // dataset property exists
}
Object.defineProperty(HTMLElement.prototype, 'dataset', {
get() {
if (this._dataset) {
return this._dataset;
}
var dataset = {};
for (var j = 0, jj = this.attributes.length; j < jj; j++) {
var attribute = this.attributes[j];
if (attribute.name.substring(0, 5) !== 'data-') {
continue;
}
var key = attribute.name.substring(5).replace(/\-([a-z])/g,
function(all, ch) {
return ch.toUpperCase();
});
dataset[key] = attribute.value;
}
Object.defineProperty(this, '_dataset', {
value: dataset,
writable: false,
enumerable: false,
});
return dataset;
},
enumerable: true,
});
})();
// Checks if possible to use URL.createObjectURL()
// Support: IE, Chrome on iOS
(function checkOnBlobSupport() {
@ -174,58 +73,6 @@ PDFJS.compatibilityChecked = true;
}
})();
// Support: IE<11, Chrome<21, Android<4.4, Safari<6
(function checkSetPresenceInImageData() {
if (!hasDOM) {
return;
}
// IE < 11 will use window.CanvasPixelArray which lacks set function.
if (window.CanvasPixelArray) {
if (typeof window.CanvasPixelArray.prototype.set !== 'function') {
window.CanvasPixelArray.prototype.set = function(arr) {
for (var i = 0, ii = this.length; i < ii; i++) {
this[i] = arr[i];
}
};
}
} else {
// 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 (isChrome) {
versionMatch = userAgent.match(/Chrom(e|ium)\/([0-9]+)\./);
// Chrome < 21 lacks the set function.
polyfill = versionMatch && parseInt(versionMatch[2]) < 21;
} 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 = 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;
}
if (polyfill) {
var contextPrototype = window.CanvasRenderingContext2D.prototype;
var createImageData = contextPrototype.createImageData;
contextPrototype.createImageData = function(w, h) {
var imageData = createImageData.call(this, w, h);
imageData.data.set = function(arr) {
for (var i = 0, ii = this.length; i < ii; i++) {
this[i] = arr[i];
}
};
return imageData;
};
// this closure will be kept referenced, so clear its vars
contextPrototype = null;
}
}
})();
// Support: Android, iOS
(function checkCanvasSizeLimitation() {
if (isIOS || isAndroid) {
@ -264,56 +111,6 @@ PDFJS.compatibilityChecked = true;
});
})();
// Provides `input.type = 'type'` runtime failure protection.
// Support: IE9,10.
(function checkInputTypeNumberAssign() {
if (!hasDOM) {
return;
}
var el = document.createElement('input');
try {
el.type = 'number';
} catch (ex) {
var inputProto = el.constructor.prototype;
var typeProperty = Object.getOwnPropertyDescriptor(inputProto, 'type');
Object.defineProperty(inputProto, 'type', {
get() {
return typeProperty.get.call(this);
},
set(value) {
typeProperty.set.call(this, value === 'number' ? 'text' : value);
},
enumerable: true,
configurable: true,
});
}
})();
// Provides correct document.readyState value for legacy browsers.
// Support: IE9,10.
(function checkDocumentReadyState() {
if (!hasDOM) {
return;
}
if (!document.attachEvent) {
return;
}
var documentProto = document.constructor.prototype;
var readyStateProto = Object.getOwnPropertyDescriptor(documentProto,
'readyState');
Object.defineProperty(documentProto, 'readyState', {
get() {
var value = readyStateProto.get.call(this);
return value === 'interactive' ? 'loading' : value;
},
set(value) {
readyStateProto.set.call(this, value);
},
enumerable: true,
configurable: true,
});
})();
// Provides support for ChildNode.remove in legacy browsers.
// Support: IE.
(function checkChildNodeRemove() {