You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
161 lines
3.7 KiB
161 lines
3.7 KiB
/** |
|
* Nextcloud - Gallery |
|
* |
|
* |
|
* This file is licensed under the Affero General Public License version 3 or |
|
* later. See the COPYING file. |
|
* |
|
* @author Olivier Paroz <galleryapps@oparoz.com> |
|
* |
|
* @copyright Olivier Paroz 2017 |
|
*/ |
|
/* global $, DOMPurify, OC, Gallery */ |
|
/** |
|
* A thumbnail is the actual image attached to the GalleryImage object |
|
* |
|
* @param {number} fileId |
|
* @param {boolean} square |
|
* @constructor |
|
*/ |
|
function Thumbnail (fileId, square) { |
|
this.square = square; |
|
this.fileId = fileId; |
|
this.image = null; |
|
this.loadingDeferred = new $.Deferred(); |
|
this.height = 200; |
|
this.width = 400; |
|
this.ratio = null; |
|
this.valid = true; |
|
this.status = 200; |
|
} |
|
|
|
(function ($, OC, Gallery) { |
|
"use strict"; |
|
var Thumbnails = { |
|
map: {}, |
|
squareMap: {}, |
|
|
|
/** |
|
* Retrieves the thumbnail linked to the given fileID |
|
* |
|
* @param {number} fileId |
|
* @param {boolean} square |
|
* |
|
* @returns {Thumbnail} |
|
*/ |
|
get: function (fileId, square) { |
|
var map = {}; |
|
if (square === true) { |
|
map = Thumbnails.squareMap; |
|
square = true; |
|
} else { |
|
map = Thumbnails.map; |
|
square = false; |
|
} |
|
if (!map[fileId]) { |
|
map[fileId] = new Thumbnail(fileId, square); |
|
} |
|
|
|
return map[fileId]; |
|
}, |
|
|
|
/** |
|
* Returns an icon of a specific type |
|
* |
|
* -1 is for a folder |
|
* -404 is for a broken file icon |
|
* -500 is for a media type icon |
|
* |
|
* @param {number} type |
|
* |
|
* @returns {Thumbnail} |
|
*/ |
|
getStandardIcon: function (type) { |
|
if (!Thumbnails.squareMap[type]) { |
|
var icon = ''; |
|
// true means square |
|
var thumb = new Thumbnail(type, true); |
|
thumb.image = new Image(); |
|
thumb.image.onload = function () { |
|
thumb.loadingDeferred.resolve(thumb.image); |
|
}; |
|
|
|
if (type === -1) { |
|
icon = 'filetypes/folder'; |
|
} |
|
thumb.image.src = OC.imagePath('core', icon); |
|
|
|
Thumbnails.squareMap[type] = thumb; |
|
} |
|
|
|
return Thumbnails.squareMap[type]; |
|
}, |
|
|
|
/** |
|
* Loads thumbnails in batch, using EventSource |
|
* |
|
* @param {Array} ids |
|
* @param {boolean} square |
|
* |
|
* @returns {{}} |
|
*/ |
|
loadBatch: function (ids, square) { |
|
var map = (square) ? Thumbnails.squareMap : Thumbnails.map; |
|
// Prevents re-loading thumbnails when resizing the window |
|
ids = ids.filter(function (id) { |
|
return !map[id]; |
|
}); |
|
var batch = {}; |
|
var i, idsLength = ids.length; |
|
if (idsLength) { |
|
_.each(ids, function(id) { |
|
var thumb = new Thumbnail(id, square); |
|
thumb.image = new Image(); |
|
map[id] = batch[id] = thumb; |
|
|
|
thumb.image.onload = function () { |
|
if (square) { |
|
thumb.image.width = 200; |
|
thumb.image.height = 200; |
|
} |
|
thumb.ratio = thumb.image.width / thumb.image.height; |
|
thumb.image.originalWidth = 200 * thumb.ratio; |
|
thumb.valid = true; |
|
thumb.status = 200; |
|
thumb.loadingDeferred.resolve(thumb.image); |
|
console.log(thumb); |
|
}; |
|
thumb.image.onerror = function (data) { |
|
thumb.loadingDeferred.resolve(null); |
|
}; |
|
var width = square ? 200 : 400; |
|
thumb.image.src = Gallery.utility.buildGalleryUrl('preview', '/' + id, {width: width, height: 200}); |
|
}); |
|
} |
|
|
|
return batch; |
|
}, |
|
|
|
/** |
|
* Sanitises SVGs |
|
* |
|
* We also fix a problem which arises when the XML contains comments |
|
* |
|
* @param imageData |
|
* @returns {string|*} |
|
* @private |
|
*/ |
|
_purifySvg: function (imageData) { |
|
var pureSvg = DOMPurify.sanitize(window.atob(imageData), {ADD_TAGS: ['filter']}); |
|
// Remove XML comment garbage left in the purified data |
|
var badTag = pureSvg.indexOf(']>'); |
|
var fixedPureSvg = pureSvg.substring(badTag < 0 ? 0 : 5, pureSvg.length); |
|
imageData = window.btoa(fixedPureSvg); |
|
|
|
return imageData; |
|
} |
|
|
|
}; |
|
|
|
window.Thumbnails = Thumbnails; |
|
})(jQuery, OC, Gallery);
|
|
|