/**
* ImageScanner.js
*
* Released under LGPL License.
* Copyright (c) 1999-2015 Ephox Corp. All rights reserved
*
* License: http://www.tinymce.com/license
* Contributing: http://www.tinymce.com/contributing
*/
/**
* Finds images with data uris or blob uris. If data uris are found it will convert them into blob uris.
*
* @private
* @class tinymce.file.ImageScanner
*/
define("tinymce/file/ImageScanner", [
"tinymce/util/Promise",
"tinymce/util/Arr",
"tinymce/file/Conversions",
"tinymce/Env"
], function(Promise, Arr, Conversions, Env) {
var count = 0;
return function(blobCache) {
var cachedPromises = {};
function findAll(elm) {
var images, promises;
function imageToBlobInfo(img, resolve) {
var base64, blobInfo;
if (img.src.indexOf('blob:') === 0) {
blobInfo = blobCache.getByUri(img.src);
if (blobInfo) {
resolve({
image: img,
blobInfo: blobInfo
});
}
return;
}
base64 = Conversions.parseDataUri(img.src).data;
blobInfo = blobCache.findFirst(function(cachedBlobInfo) {
return cachedBlobInfo.base64() === base64;
});
if (blobInfo) {
resolve({
image: img,
blobInfo: blobInfo
});
} else {
Conversions.uriToBlob(img.src).then(function(blob) {
var blobInfoId = 'blobid' + (count++),
blobInfo = blobCache.create(blobInfoId, blob, base64);
blobCache.add(blobInfo);
resolve({
image: img,
blobInfo: blobInfo
});
});
}
}
images = Arr.filter(elm.getElementsByTagName('img'), function(img) {
var src = img.src;
if (!Env.fileApi) {
return false;
}
if (img.hasAttribute('data-mce-bogus')) {
return false;
}
if (img.hasAttribute('data-mce-placeholder')) {
return false;
}
if (!src || src == Env.transparentSrc) {
return false;
}
return src.indexOf('data:') === 0 || src.indexOf('blob:') === 0;
});
promises = Arr.map(images, function(img) {
var newPromise;
if (cachedPromises[img.src]) {
// Since the cached promise will return the cached image
// We need to wrap it and resolve with the actual image
return new Promise(function(resolve) {
cachedPromises[img.src].then(function(imageInfo) {
resolve({
image: img,
blobInfo: imageInfo.blobInfo
});
});
});
}
newPromise = new Promise(function(resolve) {
imageToBlobInfo(img, resolve);
}).then(function(result) {
delete cachedPromises[result.image.src];
return result;
})['catch'](function(error) {
delete cachedPromises[img.src];
return error;
});
cachedPromises[img.src] = newPromise;
return newPromise;
});
return Promise.all(promises);
}
return {
findAll: findAll
};
};
});
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