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/* vim:set ts=2 sw=2 sts=2 et: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
"use strict";
this.EXPORTED_SYMBOLS = [
"_",
"assert",
"log",
"text",
"wire",
"showFilePicker"
];
const Cc = Components.classes;
const Ci = Components.interfaces;
const Cu = Components.utils;
Cu.import("resource://gre/modules/Services.jsm");
const PROPERTIES_URL = "chrome://browser/locale/devtools/styleeditor.properties";
const console = Services.console;
const gStringBundle = Services.strings.createBundle(PROPERTIES_URL);
/**
* Returns a localized string with the given key name from the string bundle.
*
* @param aName
* @param ...rest
* Optional arguments to format in the string.
* @return string
*/
this._ = function _(aName)
{
if (arguments.length == 1) {
return gStringBundle.GetStringFromName(aName);
}
let rest = Array.prototype.slice.call(arguments, 1);
return gStringBundle.formatStringFromName(aName, rest, rest.length);
}
/**
* Assert an expression is true or throw if false.
*
* @param aExpression
* @param aMessage
* Optional message.
* @return aExpression
*/
this.assert = function assert(aExpression, aMessage)
{
if (!!!(aExpression)) {
let msg = aMessage ? "ASSERTION FAILURE:" + aMessage : "ASSERTION FAILURE";
log(msg);
throw new Error(msg);
}
return aExpression;
}
/**
* Retrieve or set the text content of an element.
*
* @param DOMElement aRoot
* The element to use for querySelector.
* @param string aSelector
* Selector string for the element to get/set the text content.
* @param string aText
* Optional text to set.
* @return string
* Text content of matching element or null if there were no element
* matching aSelector.
*/
this.text = function text(aRoot, aSelector, aText)
{
let element = aRoot.querySelector(aSelector);
if (!element) {
return null;
}
if (aText === undefined) {
return element.textContent;
}
element.textContent = aText;
return aText;
}
/**
* Iterates _own_ properties of an object.
*
* @param aObject
* The object to iterate.
* @param function aCallback(aKey, aValue)
*/
function forEach(aObject, aCallback)
{
for (let key in aObject) {
if (aObject.hasOwnProperty(key)) {
aCallback(key, aObject[key]);
}
}
}
/**
* Log a message to the console.
*
* @param ...rest
* One or multiple arguments to log.
* If multiple arguments are given, they will be joined by " " in the log.
*/
this.log = function log()
{
console.logStringMessage(Array.prototype.slice.call(arguments).join(" "));
}
/**
* Wire up element(s) matching selector with attributes, event listeners, etc.
*
* @param DOMElement aRoot
* The element to use for querySelectorAll.
* Can be null if aSelector is a DOMElement.
* @param string|DOMElement aSelectorOrElement
* Selector string or DOMElement for the element(s) to wire up.
* @param object aDescriptor
* An object describing how to wire matching selector, supported properties
* are "events" and "attributes" taking objects themselves.
* Each key of properties above represents the name of the event or
* attribute, with the value being a function used as an event handler or
* string to use as attribute value.
* If aDescriptor is a function, the argument is equivalent to :
* {events: {'click': aDescriptor}}
*/
this.wire = function wire(aRoot, aSelectorOrElement, aDescriptor)
{
let matches;
if (typeof(aSelectorOrElement) == "string") { // selector
matches = aRoot.querySelectorAll(aSelectorOrElement);
if (!matches.length) {
return;
}
} else {
matches = [aSelectorOrElement]; // element
}
if (typeof(aDescriptor) == "function") {
aDescriptor = {events: {click: aDescriptor}};
}
for (let i = 0; i < matches.length; i++) {
let element = matches[i];
forEach(aDescriptor.events, function (aName, aHandler) {
element.addEventListener(aName, aHandler, false);
});
forEach(aDescriptor.attributes, element.setAttribute);
}
}
/**
* Show file picker and return the file user selected.
*
* @param mixed file
* Optional nsIFile or string representing the filename to auto-select.
* @param boolean toSave
* If true, the user is selecting a filename to save.
* @param nsIWindow parentWindow
* Optional parent window. If null the parent window of the file picker
* will be the window of the attached input element.
* @param callback
* The callback method, which will be called passing in the selected
* file or null if the user did not pick one.
*/
this.showFilePicker = function showFilePicker(path, toSave, parentWindow, callback)
{
if (typeof(path) == "string") {
try {
if (Services.io.extractScheme(path) == "file") {
let uri = Services.io.newURI(path, null, null);
let file = uri.QueryInterface(Ci.nsIFileURL).file;
callback(file);
return;
}
} catch (ex) {
callback(null);
return;
}
try {
let file = Cc["@mozilla.org/file/local;1"].createInstance(Ci.nsILocalFile);
file.initWithPath(path);
callback(file);
return;
} catch (ex) {
callback(null);
return;
}
}
if (path) { // "path" is an nsIFile
callback(path);
return;
}
let fp = Cc["@mozilla.org/filepicker;1"].createInstance(Ci.nsIFilePicker);
let mode = toSave ? fp.modeSave : fp.modeOpen;
let key = toSave ? "saveStyleSheet" : "importStyleSheet";
let fpCallback = function(result) {
if (result == Ci.nsIFilePicker.returnCancel) {
callback(null);
} else {
callback(fp.file);
}
};
fp.init(parentWindow, _(key + ".title"), mode);
fp.appendFilters(_(key + ".filter"), "*.css");
fp.appendFilters(fp.filterAll);
fp.open(fpCallback);
return;
}
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