131 lines
3.1 KiB
JavaScript
131 lines
3.1 KiB
JavaScript
var $ = require('jquery');
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var CoreView = require('backbone/core-view');
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var utils = require('builder/helpers/utils');
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var _ = require('underscore');
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var IMAGE_DIM = 18;
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var IMAGE_FILE_ATTRS = {
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width: '18px',
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height: '18px'
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};
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var VIEWBOX = _.template('0 0 <%- w %> <%- h %>');
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module.exports = CoreView.extend({
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initialize: function (opts) {
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if (!opts.imageClass) { throw new Error('Image class is mandatory.'); }
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this._imageClass = opts.imageClass;
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this._imageURL = opts.imageUrl;
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this._color = opts.color;
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this._lastImage = {
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url: null,
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content: null
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};
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},
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render: function () {
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this.$el.empty();
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this._loadImage();
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return this;
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},
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_loadImage: function () {
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if (!this._imageURL) { // the URL could be null or undefined
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return;
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}
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var self = this;
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if (this._isSVG(this._imageURL)) {
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this._loadSVG();
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} else {
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var $img = $('<img crossorigin="anonymous"/>');
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$img.attr('class', self._imageClass + ' js-image');
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$img.attr('src', this._imageURL + '?req=markup');
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for (var attribute in IMAGE_FILE_ATTRS) {
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$img.attr(attribute, IMAGE_FILE_ATTRS[attribute]);
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}
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this.$el.append($img);
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}
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},
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_loadSVG: function () {
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var self = this;
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this._requestImageURL(this._imageURL, function (content) {
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var svg = content.cloneNode(true);
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var $svg = $(svg);
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$svg = $svg.removeAttr('xmlns:a');
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$svg.attr('class', self._imageClass + ' js-image');
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var bbox = {
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w: IMAGE_DIM,
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h: IMAGE_DIM
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};
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if (!$svg.attr('viewBox')) {
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if ($svg.attr('height') && $svg.attr('width')) {
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bbox = {
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w: svg.width.baseVal.value,
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h: svg.height.baseVal.value
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};
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}
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$svg.attr('viewBox', VIEWBOX(bbox));
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}
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for (var attribute in IMAGE_FILE_ATTRS) {
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$svg.attr(attribute, IMAGE_FILE_ATTRS[attribute]);
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}
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self.$el.append($svg);
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$svg.css('fill', self._color);
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$svg.find('g').css('fill', 'inherit');
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$svg.find('path').css('fill', 'inherit');
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$svg.find('rect').each(function (_, rect) {
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var $rect = $(rect);
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if ($rect.css('fill') !== 'none') {
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$rect.css('fill', 'inherit');
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}
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});
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});
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},
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_requestImageURL: function (url, callback) {
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var self = this;
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var completeUrl = url + '?req=ajax';
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if (this._lastImage.url === completeUrl) {
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callback && callback(this._lastImage.content);
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} else {
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$.ajax(completeUrl)
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.done(function (data) {
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self._lastImage.url = completeUrl;
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var content = self._lastImage.content = data.getElementsByTagName('svg')[0];
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callback && callback(content);
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})
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.fail(function () {
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throw new Error("Couldn't get " + completeUrl + ' file.');
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});
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}
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},
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updateImageColor: function (color) {
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this.$('.js-image').css('fill', color);
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},
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_isSVG: function (url) {
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if (!url) {
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return false;
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}
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var noQueryString = url.split('?')[0];
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return noQueryString && utils.endsWith(noQueryString.toUpperCase(), 'SVG');
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}
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});
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