/
send_links.js
35 lines (30 loc) · 1.08 KB
/
send_links.js
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// Copyright (c) 2012 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.
// Send back to the popup a sorted deduped list of valid link URLs on this page.
// The popup injects this script into all frames in the active tab.
var links = [].slice.apply(document.getElementsByTagName('a'));
links = links.map(function(element) {
// Return an anchor's href attribute, stripping any URL fragment (hash '#').
// If the html specifies a relative path, chrome converts it to an absolute
// URL.
var href = element.href;
var hashIndex = href.indexOf('#');
if (hashIndex >= 0) {
href = href.substr(0, hashIndex);
}
return href;
});
links.sort();
// Remove duplicates and invalid URLs.
var kBadPrefix = 'javascript';
for (var i = 0; i < links.length;) {
if (((i > 0) && (links[i] == links[i - 1])) ||
(links[i] == '') ||
(kBadPrefix == links[i].toLowerCase().substr(0, kBadPrefix.length))) {
links.splice(i, 1);
} else {
++i;
}
}
chrome.extension.sendRequest(links);