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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
*
* RedirLib - Utility functions for Firefox extensions
*
* Einar Egilsson
*
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
var RedirLib = {
_debug : false,
_ext : null,
_cout : null,
_prefBranch : null,
version : 0.2,
initialize : function(extension) {
this._ext = extension;
this._cout = Cc["@mozilla.org/consoleservice;1"].getService(Ci.nsIConsoleService);
this._debug = true;
this._initPrefs();
},
debug : function(str) {
if (this._ext.prefs.debug) {
this._cout.logStringMessage("%1: %2"._(this._ext.name, str));
}
},
debugObject : function(name, obj) {
s = name + ': ';
for (x in obj)
s += "\n\t%1 : %2"._(x, obj[x]);
this.debug(s);
},
//Adds all prefs to a prefs object on the extension object, and registers a pref observer
//for the branch.
_initPrefs : function() {
this._prefBranch = Cc["@mozilla.org/preferences-service;1"].getService(Ci.nsIPrefService)
.getBranch("extensions.%1."._(this._ext.id.split("@")[0]));
this._ext.prefs = {};
var list = this._prefBranch.getChildList("", {}).toString().split(",");
for (i in list) {
var name = list[i];
var type = this._prefBranch.getPrefType(name);
if (type == this._prefBranch.PREF_STRING) {
this._ext.prefs[name] = this._prefBranch.getCharPref(name);
} else if (type == this._prefBranch.PREF_INT) {
this._ext.prefs[name] = this._prefBranch.getIntPref(name);
} else if (type == this._prefBranch.PREF_BOOL) {
this._ext.prefs[name] = this._prefBranch.getBoolPref(name);
}
}
},
getCharPref : function(branch) {
return this._prefBranch.getCharPref(branch);
},
getBoolPref : function(branch) {
return this._prefBranch.getBoolPref(branch);
},
getIntPref : function(branch) {
return this._prefBranch.getIntPref(branch);
},
getExtensionFolder : function() {
return Cc["@mozilla.org/extensions/manager;1"]
.getService(Ci.nsIExtensionManager)
.getInstallLocation(this._ext.id)
.getItemLocation(this._ext.id);
},
getEnvVar : function(name) {
return Cc["@mozilla.org/process/environment;1"]
.getService(Ci.nsIEnvironment)
.get(name);
},
setEnvVar : function(name, value) {
return Cc["@mozilla.org/process/environment;1"]
.getService(Ci.nsIEnvironment)
.set(name, value);
},
msgBox : function(title, text) {
Cc["@mozilla.org/embedcomp/prompt-service;1"]
.getService(Ci.nsIPromptService)
.alert(window, title, text);
},
//Converts a chrome path to a local file path. Note that the
//file specified at the end of the chrome path does not have
//to exist.
chromeToPath : function(path) {
var rv;
var ios = Cc["@mozilla.org/network/io-service;1"].createInstance(Ci.nsIIOService);
var uri = ios.newURI(path, 'UTF-8', null);
var cr = Cc["@mozilla.org/chrome/chrome-registry;1"].createInstance(Ci.nsIChromeRegistry);
return cr.convertChromeURL(uri);
return decodeURI(rv.spec.substr("file:///".length).replace(/\//g, "\\"));
},
//Saves 'content' to file 'filepath'. Note that filepath needs to
//be a real file path, not a chrome path.
saveToFile : function(filepath, content) {
var file = this.getFile(filepath);
if (!file.exists()) {
file.create(Ci.nsIFile.NORMAL_FILE_TYPE, 420);
}
var outputStream = Cc["@mozilla.org/network/file-output-stream;1"].createInstance(Ci.nsIFileOutputStream);
outputStream.init( file, 0x04 | 0x08 | 0x20, 420, 0 );
var result = outputStream.write( content, content.length );
outputStream.close();
},
startProcess: function(filename, args) {
var file = this.getFile(filename);
args = args ? args : [];
if (file.exists()) {
var nsIProcess = Cc["@mozilla.org/process/util;1"].getService(Ci.nsIProcess);
nsIProcess.init(file);
nsIProcess.run(false, args, args.length);
} else {
throw Error("File '%1' does not exist!"._(filename));
}
},
//Simulates a double click on the file in question
launchFile : function(filepath) {
var f = this.getFile(filepath);
f.launch();
},
//Gets a local file reference, return the interface nsILocalFile.
getFile : function(filepath) {
var f = Cc["@mozilla.org/file/local;1"].createInstance(Ci.nsILocalFile);
f.initWithPath(filepath);
return f;
},
//Returns all elements that match the query sent in. The root used
//in the query is the window.content.document, so this will only
//work for html content.
xpath : function(doc, query) {
return doc.evaluate(query, doc, null, XPathResult.UNORDERED_NODE_SNAPSHOT_TYPE, null);
}
};
//************** Some prototype enhancements ************** //
if (!window.Cc) window.Cc = Components.classes;
if (!window.Ci) window.Ci = Components.interfaces;
//Returns true if the string contains the substring str.
String.prototype.contains = function (str) {
return this.indexOf(str) != -1;
};
String.prototype.trim = function() {
return this.replace(/^\s*|\s*$/gi, '');
};
String.prototype.startsWith = function(s) {
return (this.length >= s.length && this.substr(0, s.length) == s);
};
String.prototype.endsWith = function(s) {
return (this.length >= s.length && this.substr(this.length - s.length) == s);
};
//Inserts the arguments into the string. E.g. if
//the string is "Hello %1" then "Hello %1"._('johnny')
//would return "Hello johnny"
String.prototype._ = function() {
s = this;
for (var i = 0; i < arguments.length; i++) {
var nr = "%" + (i+1);
var repl;
if (arguments[i] == null) {
repl = "null";
} else if (arguments[i] == undefined) {
repl = "undefined";
} else {
repl = arguments[i];
}
s = s.replace(new RegExp(nr, "g"), repl);
}
return s;
};
function $(id) {
return document.getElementById(id);
}
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