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// Copyright (c) 2010 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.
// TODO(arv): Move to shared/js once namespaced and tested.
var global = this;
const IS_MAC = /^Mac/.test(navigator.platform);
function $(id) {
return document.getElementById(id);
}
function url(s) {
// http://www.w3.org/TR/css3-values/#uris
// Parentheses, commas, whitespace characters, single quotes (') and double
// quotes (") appearing in a URI must be escaped with a backslash
var s2 = s.replace(/(\(|\)|\,|\s|\'|\"|\\)/g, '\\$1');
// WebKit has a bug when it comes to URLs that end with \
// https://bugs.webkit.org/show_bug.cgi?id=28885
if (/\\\\$/.test(s2)) {
// Add a space to work around the WebKit bug.
s2 += ' ';
}
return 'url("' + s2 + '")';
}
function findAncestorByClass(el, className) {
return findAncestor(el, function(el) {
if (el.classList)
return el.classList.contains(className);
return null;
});
}
/**
* Return the first ancestor for which the {@code predicate} returns true.
* @param {Node} node The node to check.
* @param {function(Node) : boolean} predicate The function that tests the
* nodes.
* @return {Node} The found ancestor or null if not found.
*/
function findAncestor(node, predicate) {
var last = false;
while (node != null && !(last = predicate(node))) {
node = node.parentNode;
}
return last ? node : null;
}
function swapDomNodes(a, b) {
var afterA = a.nextSibling;
if (afterA == b) {
swapDomNodes(b, a);
return;
}
var aParent = a.parentNode;
b.parentNode.replaceChild(a, b);
aParent.insertBefore(b, afterA);
}
/**
* Calls chrome.send with a callback and restores the original afterwards.
*/
function chromeSend(name, params, callbackName, callback) {
var old = global[callbackName];
global[callbackName] = function() {
// restore
global[callbackName] = old;
var args = Array.prototype.slice.call(arguments);
return callback.apply(global, args);
};
chrome.send(name, params);
}
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