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Add atob polyfill for ie9 for SVG base64 rendering

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This commit is contained in:
Niklas von Hertzen 2014-09-09 18:42:00 +03:00
parent 36052c2765
commit 0325a9b836
4 changed files with 84 additions and 6 deletions
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43
dist/html2canvas.js vendored
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@ -312,7 +312,7 @@ ImageLoader.prototype.addImage = function(images, callback) {
newImage.args.forEach(function(image) {
if (!this.imageExists(images, image)) {
images.splice(0, 0, callback.call(this, newImage));
log('Added image #' + (images.length), image);
log('Added image #' + (images.length), typeof(image) === "string" ? image.substring(0, 100) : image);
}
}, this);
};
@ -1793,7 +1793,7 @@ SVGContainer.prototype.hasFabric = function() {
};
SVGContainer.prototype.inlineFormatting = function(src) {
return (/^data:image\/svg\+xml;base64,/.test(src)) ? window.atob(this.removeContentType(src)) : this.removeContentType(src);
return (/^data:image\/svg\+xml;base64,/.test(src)) ? this.decode64(this.removeContentType(src)) : this.removeContentType(src);
};
SVGContainer.prototype.removeContentType = function(src) {
@ -1818,6 +1818,45 @@ SVGContainer.prototype.createCanvas = function(resolve) {
};
};
SVGContainer.prototype.decode64 = function(str) {
return (typeof(window.atob) === "function") ? window.atob(str) : decode64(str);
};
/*
* base64-arraybuffer
* https://github.com/niklasvh/base64-arraybuffer
*
* Copyright (c) 2012 Niklas von Hertzen
* Licensed under the MIT license.
*/
function decode64(base64) {
var chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
var len = base64.length, i, encoded1, encoded2, encoded3, encoded4, byte1, byte2, byte3;
var output = "";
for (i = 0; i < len; i+=4) {
encoded1 = chars.indexOf(base64[i]);
encoded2 = chars.indexOf(base64[i+1]);
encoded3 = chars.indexOf(base64[i+2]);
encoded4 = chars.indexOf(base64[i+3]);
byte1 = (encoded1 << 2) | (encoded2 >> 4);
byte2 = ((encoded2 & 15) << 4) | (encoded3 >> 2);
byte3 = ((encoded3 & 3) << 6) | encoded4;
if (encoded3 === 64) {
output += String.fromCharCode(byte1);
} else if (encoded4 === 64 || encoded4 === -1) {
output += String.fromCharCode(byte1, byte2);
} else{
output += String.fromCharCode(byte1, byte2, byte3);
}
}
return output;
}
function SVGNodeContainer(node) {
this.src = node;
this.image = null;

4
dist/html2canvas.min.js vendored
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File diff suppressed because one or more lines are too long

2
src/imageloader.js
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@ -22,7 +22,7 @@ ImageLoader.prototype.addImage = function(images, callback) {
newImage.args.forEach(function(image) {
if (!this.imageExists(images, image)) {
images.splice(0, 0, callback.call(this, newImage));
log('Added image #' + (images.length), image);
log('Added image #' + (images.length), typeof(image) === "string" ? image.substring(0, 100) : image);
}
}, this);
};

41
src/svgcontainer.js
View File

@ -17,7 +17,7 @@ SVGContainer.prototype.hasFabric = function() {
};
SVGContainer.prototype.inlineFormatting = function(src) {
return (/^data:image\/svg\+xml;base64,/.test(src)) ? window.atob(this.removeContentType(src)) : this.removeContentType(src);
return (/^data:image\/svg\+xml;base64,/.test(src)) ? this.decode64(this.removeContentType(src)) : this.removeContentType(src);
};
SVGContainer.prototype.removeContentType = function(src) {
@ -41,3 +41,42 @@ SVGContainer.prototype.createCanvas = function(resolve) {
resolve(canvas.lowerCanvasEl);
};
};
SVGContainer.prototype.decode64 = function(str) {
return (typeof(window.atob) === "function") ? window.atob(str) : decode64(str);
};
/*
* base64-arraybuffer
* https://github.com/niklasvh/base64-arraybuffer
*
* Copyright (c) 2012 Niklas von Hertzen
* Licensed under the MIT license.
*/
function decode64(base64) {
var chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
var len = base64.length, i, encoded1, encoded2, encoded3, encoded4, byte1, byte2, byte3;
var output = "";
for (i = 0; i < len; i+=4) {
encoded1 = chars.indexOf(base64[i]);
encoded2 = chars.indexOf(base64[i+1]);
encoded3 = chars.indexOf(base64[i+2]);
encoded4 = chars.indexOf(base64[i+3]);
byte1 = (encoded1 << 2) | (encoded2 >> 4);
byte2 = ((encoded2 & 15) << 4) | (encoded3 >> 2);
byte3 = ((encoded3 & 3) << 6) | encoded4;
if (encoded3 === 64) {
output += String.fromCharCode(byte1);
} else if (encoded4 === 64 || encoded4 === -1) {
output += String.fromCharCode(byte1, byte2);
} else{
output += String.fromCharCode(byte1, byte2, byte3);
}
}
return output;
}