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/*
Copyright (c) 2006-2008 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.
*/
/*
Common methods for performance-plotting JS.
*/
function Fetch(url, callback) {
var r = new XMLHttpRequest();
r.open("GET", url, true);
r.setRequestHeader("pragma", "no-cache");
r.setRequestHeader("cache-control", "no-cache");
r.onreadystatechange = function() {
if (r.readyState == 4) {
var error;
var text = r.responseText;
if (r.status != 200) {
error = url + ": " + r.status + ": " + r.statusText;
} else if (! text) {
error = url + ": null response";
}
callback(text, error);
}
}
r.send(null);
}
// Returns the keys of an object.
function Keys(obj) {
result = [];
for (key in obj) {
result.push(key)
}
return result
}
// Returns the "directory name" portion of the string (URL),
// stripping the last element.
function DirName(s) {
elements = s.split('/')
elements.pop()
return elements.join('/')
}
// Returns an Object with properties given by the parameters specified in the
// URL's query string.
function ParseParams() {
var result = new Object();
var s = window.location.search.substring(1).split('&');
for (i = 0; i < s.length; ++i) {
var v = s[i].split('=');
result[v[0]] = unescape(v[1]);
}
return result;
}
// Creates the URL constructed from the current pathname and the given params.
function MakeURL(params) {
var url = window.location.pathname;
var sep = '?';
for (p in params) {
if (!p)
continue;
url = url + sep + p + '=' + params[p];
sep = '&';
}
return url;
}
// Returns a string describing an object, recursively. On the initial call,
// |name| is optionally the name of the object and |indent| is not needed.
function DebugDump(obj, opt_name, opt_indent) {
var name = opt_name || '';
var indent = opt_indent || '';
if (typeof obj == "object") {
var child = null;
var output = indent + name + "\n";
for (var item in obj) {
try {
child = obj[item];
} catch (e) {
child = "<Unable to Evaluate>";
}
output += DebugDump(child, item, indent + " ");
}
return output;
} else {
return indent + name + ": " + obj + "\n";
}
}
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