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prefLoader.js
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prefLoader.js
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/* See license.txt for terms of usage */
// ********************************************************************************************* //
// Constants
var Cc = Components.classes;
var Ci = Components.interfaces;
var Cu = Components.utils;
Cu.import("resource://gre/modules/Services.jsm");
var EXPORTED_SYMBOLS = ["PrefLoader"];
var PrefLoader = {};
PrefLoader.prefDomain = "extensions.firebug.";
// ********************************************************************************************* //
// Implementation
/**
* Load file with default preferences
*
* @param {Object} path Extension installation path
* @param {Object} fileName Preference file name
*/
function loadDefaultPrefs(path, fileName)
{
try
{
var uri;
var baseURI = Services.io.newFileURI(path);
// Compute preference file name path.
if (path.isDirectory())
uri = Services.io.newURI("defaults/preferences/" + fileName, null, baseURI).spec;
else
uri = "jar:" + baseURI.spec + "!/defaults/preferences/" + fileName;
// Load preference file and use 'pref' function to define all prefs.
Services.scriptloader.loadSubScript(uri, {pref: pref});
}
catch (err)
{
Cu.reportError(err);
}
}
// ********************************************************************************************* //
/**
* Clear preferences that are not modified by the user. This is requirement
* (or recommendation?) from AMO reviewers.
*
* @param {Object} domain
*/
function clearDefaultPrefs(domain)
{
domain = domain || PrefLoader.prefDomain;
var pb = Services.prefs.getDefaultBranch(domain);
var names = pb.getChildList("");
for each (var name in names)
{
if (!pb.prefHasUserValue(name))
pb.deleteBranch(name);
}
}
// ********************************************************************************************* //
/**
* Implement function that is used to define preferences in preference files. These
* are usually stored within 'defaults/preferences' directory.
*
* @param {Object} name Preference name
* @param {Object} value Preference value
*/
function pref(name, value)
{
try
{
var branch = Services.prefs.getDefaultBranch("");
switch (typeof value)
{
case "boolean":
branch.setBoolPref(name, value);
break;
case "number":
branch.setIntPref(name, value);
break;
case "string":
var str = Cc["@mozilla.org/supports-string;1"].createInstance(Ci.nsISupportsString);
str.data = value;
branch.setComplexValue(name, Ci.nsISupportsString, str);
break;
}
}
catch (e)
{
Cu.reportError("prefLoader.pref; Firebug can't set default pref value for: " + name);
}
}
// ********************************************************************************************* //
// Duplicates firebug/lib/options
var prefTypeMap = (function()
{
var map = {}, br = Ci.nsIPrefBranch;
map["string"] = map[br.PREF_STRING] = "CharPref";
map["boolean"] = map[br.PREF_BOOL] = "BoolPref";
map["number"] = map[br.PREF_INT] = "IntPref";
return map;
})();
function getPref(prefDomain, name)
{
var prefName;
if (name == undefined)
prefName = PrefLoader.prefDomain + prefDomain;
else
prefName = prefDomain + "." + name;
var prefs = Services.prefs;
var type = prefTypeMap[prefs.getPrefType(prefName)];
if (type)
var value = prefs["get" + type](prefName);
return value;
}
function setPref(name, value)
{
var prefName = PrefLoader.prefDomain + name;
var prefs = Services.prefs;
var type = prefTypeMap[typeof value];
if (type)
value = prefs["set" + type](prefName, value);
return value;
}
// ********************************************************************************************* //
// Registration
PrefLoader.loadDefaultPrefs = loadDefaultPrefs;
PrefLoader.clearDefaultPrefs = clearDefaultPrefs;
PrefLoader.getPref = getPref;
PrefLoader.setPref = setPref;
// ********************************************************************************************* //