gecko/toolkit/components/aboutmemory/content/aboutMemory.js

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/* -*- Mode: js2; js2-basic-offset: 4; indent-tabs-mode: nil; -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is about:memory
*
* The Initial Developer of the Original Code is
* Mozilla Corporation
* Portions created by the Initial Developer are Copyright (C) 2009
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Vladimir Vukicevic <vladimir@pobox.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
var gMemReporters = { };
function $(n) {
return document.getElementById(n);
}
function makeTableCell(content, c) {
var td = document.createElement("td");
if (typeof content == "string")
content = document.createTextNode(content);
td.appendChild(content);
if (c)
td.setAttribute("class", c);
return td;
}
function makeAbbrNode(str, title) {
var abbr = document.createElement("abbr");
var text = document.createTextNode(str);
abbr.appendChild(text);
abbr.setAttribute("title", title);
return abbr;
}
function makeTableRow() {
var row = document.createElement("tr");
for (var i = 0; i < arguments.length; ++i) {
var arg = arguments[i];
if (typeof(arg) == "string") {
row.appendChild(makeTableCell(arg));
} else if (arg.__proto__ == Array.prototype) {
row.appendChild(makeTableCell(makeAbbrNode(arg[0], arg[1])));
} else {
row.appendChild(arg);
}
}
return row;
}
function setTextContent(node, s) {
while (node.lastChild)
node.removeChild(node.lastChild);
node.appendChild(document.createTextNode(s));
}
function formatNumber(n) {
var s = "";
var neg = false;
if (n < 0) {
neg = true;
n = -n;
}
do {
var k = n % 1000;
if (n > 999) {
if (k > 99)
s = k + s;
else if (k > 9)
s = "0" + k + s;
else
s = "00" + k + s;
} else {
s = k + s;
}
n = Math.floor(n / 1000);
if (n > 0)
s = "," + s;
} while (n > 0);
return s;
}
function updateMemoryStatus()
{
// if we have the standard reporters for mapped/allocated, put
// those at the top
if ("malloc/mapped" in gMemReporters &&
"malloc/allocated" in gMemReporters)
{
// committed is the total amount of memory that we've touched, that is that we have
// some kind of backing store for
setTextContent($("memMappedValue"),
formatNumber(gMemReporters["malloc/mapped"].memoryUsed));
// allocated is the amount of committed memory that we're actively using (i.e., that isn't free)
setTextContent($("memInUseValue"),
formatNumber(gMemReporters["malloc/allocated"].memoryUsed));
} else {
$("memOverview").style.display = "none";
}
var mo = $("memOtherRows");
while (mo.lastChild)
mo.removeChild(mo.lastChild);
var otherCount = 0;
for each (var rep in gMemReporters) {
var row = makeTableRow([rep.path, rep.description],
makeTableCell(formatNumber(rep.memoryUsed), "memValue"));
mo.appendChild(row);
otherCount++;
}
if (otherCount == 0) {
var row = makeTableRow("No other information available.");
mo.appendChild(row);
}
}
function doLoad()
{
var mgr = Components
.classes["@mozilla.org/memory-reporter-manager;1"]
.getService(Components.interfaces.nsIMemoryReporterManager);
var e = mgr.enumerateReporters();
while (e.hasMoreElements()) {
var mr = e.getNext().QueryInterface(Components.interfaces.nsIMemoryReporter);
gMemReporters[mr.path] = mr;
}
updateMemoryStatus();
}