gecko/browser/devtools/tilt/Tilt.jsm

244 lines
7.1 KiB
JavaScript

/* -*- Mode: javascript; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 et sw=2 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";
const Cu = Components.utils;
// Tilt notifications dispatched through the nsIObserverService.
const TILT_NOTIFICATIONS = {
// Fires when Tilt starts the initialization.
INITIALIZING: "tilt-initializing",
// Fires immediately after initialization is complete.
// (when the canvas overlay is visible and the 3D mesh is completely created)
INITIALIZED: "tilt-initialized",
// Fires immediately before the destruction is started.
DESTROYING: "tilt-destroying",
// Fires immediately before the destruction is finished.
// (just before the canvas overlay is removed from its parent node)
BEFORE_DESTROYED: "tilt-before-destroyed",
// Fires when Tilt is completely destroyed.
DESTROYED: "tilt-destroyed",
// Fires when Tilt is shown (after a tab-switch).
SHOWN: "tilt-shown",
// Fires when Tilt is hidden (after a tab-switch).
HIDDEN: "tilt-hidden",
// Fires once Tilt highlights an element in the page.
HIGHLIGHTING: "tilt-highlighting",
// Fires once Tilt stops highlighting any element.
UNHIGHLIGHTING: "tilt-unhighlighting",
// Fires when a node is removed from the 3D mesh.
NODE_REMOVED: "tilt-node-removed"
};
Cu.import("resource://gre/modules/Services.jsm");
Cu.import("resource:///modules/devtools/TiltGL.jsm");
Cu.import("resource:///modules/devtools/TiltUtils.jsm");
Cu.import("resource:///modules/devtools/EventEmitter.jsm");
Cu.import("resource:///modules/devtools/TiltVisualizer.jsm");
this.EXPORTED_SYMBOLS = ["TiltManager"];
this.TiltManager = {
_instances: new WeakMap(),
getTiltForBrowser: function(aChromeWindow)
{
if (this._instances.has(aChromeWindow)) {
return this._instances.get(aChromeWindow);
} else {
let tilt = new Tilt(aChromeWindow);
this._instances.set(aChromeWindow, tilt);
return tilt;
}
},
}
/**
* Object managing instances of the visualizer.
*
* @param {Window} aWindow
* the chrome window used by each visualizer instance
*/
this.Tilt = function Tilt(aWindow)
{
/**
* Save a reference to the top-level window.
*/
this.chromeWindow = aWindow;
/**
* All the instances of TiltVisualizer.
*/
this.visualizers = {};
/**
* Shortcut for accessing notifications strings.
*/
this.NOTIFICATIONS = TILT_NOTIFICATIONS;
EventEmitter.decorate(this);
this.setup();
}
Tilt.prototype = {
/**
* Initializes a visualizer for the current tab or closes it if already open.
*/
toggle: function T_toggle()
{
let contentWindow = this.chromeWindow.gBrowser.selectedBrowser.contentWindow;
let id = this.currentWindowId;
let self = this;
contentWindow.addEventListener("beforeunload", function onUnload() {
contentWindow.removeEventListener("beforeunload", onUnload, false);
self.destroy(id, true);
}, false);
// if the visualizer for the current tab is already open, destroy it now
if (this.visualizers[id]) {
this.destroy(id, true);
return;
}
// create a visualizer instance for the current tab
this.visualizers[id] = new TiltVisualizer({
chromeWindow: this.chromeWindow,
contentWindow: this.chromeWindow.gBrowser.selectedBrowser.contentWindow,
parentNode: this.chromeWindow.gBrowser.selectedBrowser.parentNode,
notifications: this.NOTIFICATIONS,
tab: this.chromeWindow.gBrowser.selectedTab
});
// make sure the visualizer object was initialized properly
if (!this.visualizers[id].isInitialized()) {
this.destroy(id);
this.failureCallback && this.failureCallback();
return;
}
this.emit("change", this.chromeWindow.gBrowser.selectedTab);
Services.obs.notifyObservers(null, TILT_NOTIFICATIONS.INITIALIZING, null);
},
/**
* Starts destroying a specific instance of the visualizer.
*
* @param {String} aId
* the identifier of the instance in the visualizers array
* @param {Boolean} aAnimateFlag
* optional, set to true to display a destruction transition
*/
destroy: function T_destroy(aId, aAnimateFlag)
{
// if the visualizer is destroyed or destroying, don't do anything
if (!this.visualizers[aId] || this._isDestroying) {
return;
}
this._isDestroying = true;
let controller = this.visualizers[aId].controller;
let presenter = this.visualizers[aId].presenter;
let content = presenter.contentWindow;
let pageXOffset = content.pageXOffset * presenter.transforms.zoom;
let pageYOffset = content.pageYOffset * presenter.transforms.zoom;
TiltUtils.setDocumentZoom(this.chromeWindow, presenter.transforms.zoom);
// if we're not doing any outro animation, just finish destruction directly
if (!aAnimateFlag) {
this._finish(aId);
return;
}
// otherwise, trigger the outro animation and notify necessary observers
Services.obs.notifyObservers(null, TILT_NOTIFICATIONS.DESTROYING, null);
controller.removeEventListeners();
controller.arcball.reset([-pageXOffset, -pageYOffset]);
presenter.executeDestruction(this._finish.bind(this, aId));
},
/**
* Finishes detroying a specific instance of the visualizer.
*
* @param {String} aId
* the identifier of the instance in the visualizers array
*/
_finish: function T__finish(aId)
{
this.visualizers[aId].removeOverlay();
this.visualizers[aId].cleanup();
this.visualizers[aId] = null;
this._isDestroying = false;
this.chromeWindow.gBrowser.selectedBrowser.focus();
this.emit("change", this.chromeWindow.gBrowser.selectedTab);
Services.obs.notifyObservers(null, TILT_NOTIFICATIONS.DESTROYED, null);
},
/**
* Handles the event fired when a tab is selected.
*/
_onTabSelect: function T__onTabSelect()
{
if (this.currentInstance) {
Services.obs.notifyObservers(null, TILT_NOTIFICATIONS.SHOWN, null);
} else {
Services.obs.notifyObservers(null, TILT_NOTIFICATIONS.HIDDEN, null);
}
},
/**
* Add the browser event listeners to handle state changes.
*/
setup: function T_setup()
{
// load the preferences from the devtools.tilt branch
TiltVisualizer.Prefs.load();
this.chromeWindow.gBrowser.tabContainer.addEventListener(
"TabSelect", this._onTabSelect.bind(this), false);
},
/**
* Returns true if this tool is enabled.
*/
get enabled()
{
return (TiltVisualizer.Prefs.enabled &&
(TiltGL.isWebGLForceEnabled() || TiltGL.isWebGLSupported()));
},
/**
* Gets the ID of the current window object to identify the visualizer.
*/
get currentWindowId()
{
return TiltUtils.getWindowId(
this.chromeWindow.gBrowser.selectedBrowser.contentWindow);
},
/**
* Gets the visualizer instance for the current tab.
*/
get currentInstance()
{
return this.visualizers[this.currentWindowId];
},
};