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/* vim:set ts=2 sw=2 sts=2 et tw=80:
* 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 = ["ScratchpadManager"];
const Cc = Components.classes;
const Ci = Components.interfaces;
const Cu = Components.utils;
const SCRATCHPAD_WINDOW_URL = "chrome://devtools/content/scratchpad/scratchpad.xul";
const SCRATCHPAD_WINDOW_FEATURES = "chrome,titlebar,toolbar,centerscreen,resizable,dialog=no";
const {require} = Cu.import("resource://devtools/shared/Loader.jsm", {});
const Services = require("Services");
const Telemetry = require("devtools/client/shared/telemetry");
/**
* The ScratchpadManager object opens new Scratchpad windows and manages the state
* of open scratchpads for session restore. There's only one ScratchpadManager in
* the life of the browser.
*/
this.ScratchpadManager = {
_nextUid: 1,
_scratchpads: [],
_telemetry: new Telemetry(),
/**
* Get the saved states of open scratchpad windows. Called by
* session restore.
*
* @return array
* The array of scratchpad states.
*/
getSessionState: function SPM_getSessionState()
{
return this._scratchpads;
},
/**
* Restore scratchpad windows from the scratchpad session store file.
* Called by session restore.
*
* @param function aSession
* The session object with scratchpad states.
*
* @return array
* The restored scratchpad windows.
*/
restoreSession: function SPM_restoreSession(aSession)
{
if (!Array.isArray(aSession)) {
return [];
}
let wins = [];
aSession.forEach(function (state) {
let win = this.openScratchpad(state);
wins.push(win);
}, this);
return wins;
},
/**
* Iterate through open scratchpad windows and save their states.
*/
saveOpenWindows: function SPM_saveOpenWindows() {
this._scratchpads = [];
function clone(src) {
let dest = {};
for (let key in src) {
if (src.hasOwnProperty(key)) {
dest[key] = src[key];
}
}
return dest;
}
// We need to clone objects we get from Scratchpad instances
// because such (cross-window) objects have a property 'parent'
// that holds on to a ChromeWindow instance. This means that
// such objects are not primitive-values-only anymore so they
// can leak.
let enumerator = Services.wm.getEnumerator("devtools:scratchpad");
while (enumerator.hasMoreElements()) {
let win = enumerator.getNext();
if (!win.closed && win.Scratchpad.initialized) {
this._scratchpads.push(clone(win.Scratchpad.getState()));
}
}
},
/**
* Open a new scratchpad window with an optional initial state.
*
* @param object aState
* Optional. The initial state of the scratchpad, an object
* with properties filename, text, and executionContext.
*
* @return nsIDomWindow
* The opened scratchpad window.
*/
openScratchpad: function SPM_openScratchpad(aState)
{
let params = Cc["@mozilla.org/embedcomp/dialogparam;1"]
.createInstance(Ci.nsIDialogParamBlock);
params.SetNumberStrings(2);
params.SetString(0, this.createUid());
if (aState) {
if (typeof aState != "object") {
return;
}
params.SetString(1, JSON.stringify(aState));
}
let win = Services.ww.openWindow(null, SCRATCHPAD_WINDOW_URL, "_blank",
SCRATCHPAD_WINDOW_FEATURES, params);
this._telemetry.toolOpened("scratchpad-window");
let onClose = () => {
this._telemetry.toolClosed("scratchpad-window");
};
win.addEventListener("unload", onClose);
// Only add the shutdown observer if we've opened a scratchpad window.
ShutdownObserver.init();
return win;
},
/**
* Create a unique ID for a new Scratchpad.
*/
createUid: function SPM_createUid()
{
return JSON.stringify(this._nextUid++);
}
};
/**
* The ShutdownObserver listens for app shutdown and saves the current state
* of the scratchpads for session restore.
*/
var ShutdownObserver = {
_initialized: false,
init: function SDO_init()
{
if (this._initialized) {
return;
}
Services.obs.addObserver(this, "quit-application-granted", false);
this._initialized = true;
},
observe: function SDO_observe(aMessage, aTopic, aData)
{
if (aTopic == "quit-application-granted") {
ScratchpadManager.saveOpenWindows();
this.uninit();
}
},
uninit: function SDO_uninit()
{
Services.obs.removeObserver(this, "quit-application-granted");
}
};
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