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// Copyright 2018 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
/**
* @fileoverview 'site-favicon' is the section to display the favicon given the
* site URL.
*/
Polymer({
is: 'site-favicon',
properties: {
faviconUrl: String,
url: String,
},
/** @private */
getBackgroundImage_: function() {
let backgroundImage = cr.icon.getFavicon('');
if (this.faviconUrl) {
const url = this.ensureUrlHasScheme_(this.faviconUrl);
backgroundImage = cr.icon.getFavicon(url);
} else if (this.url) {
let url = this.removePatternWildcard_(this.url);
url = this.ensureUrlHasScheme_(url);
backgroundImage = cr.icon.getFaviconForPageURL(url || '', false);
}
return backgroundImage;
},
/**
* Removes the wildcard prefix from a pattern string.
* @param {string} pattern The pattern to remove the wildcard from.
* @return {string} The resulting pattern.
* @private
*/
removePatternWildcard_: function(pattern) {
if (!pattern || pattern.length === 0) {
return pattern;
}
if (pattern.startsWith('http://[*.]')) {
return pattern.replace('http://[*.]', 'http://');
} else if (pattern.startsWith('https://[*.]')) {
return pattern.replace('https://[*.]', 'https://');
} else if (pattern.startsWith('[*.]')) {
return pattern.substring(4, pattern.length);
}
return pattern;
},
/**
* Ensures the URL has a scheme (assumes http if omitted).
* @param {string} url The URL with or without a scheme.
* @return {string} The URL with a scheme, or an empty string.
* @private
*/
ensureUrlHasScheme_: function(url) {
if (!url || url.length === 0) {
return url;
}
return url.includes('://') ? url : 'http://' + url;
},
});
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