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/* 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/. */
/*
* This module tracks each browser window and informs network module
* the current selected tab's content outer window ID.
*/
var EXPORTED_SYMBOLS = ["BrowserWindowTracker"];
const { XPCOMUtils } = ChromeUtils.import(
"resource://gre/modules/XPCOMUtils.jsm"
);
const { Services } = ChromeUtils.import("resource://gre/modules/Services.jsm");
// Lazy getters
XPCOMUtils.defineLazyModuleGetters(this, {
PrivateBrowsingUtils: "resource://gre/modules/PrivateBrowsingUtils.jsm",
});
// Constants
const TAB_EVENTS = ["TabBrowserInserted", "TabSelect"];
const WINDOW_EVENTS = ["activate", "unload"];
const DEBUG = false;
// Variables
var _lastTopLevelWindowID = 0;
var _trackedWindows = [];
// Global methods
function debug(s) {
if (DEBUG) {
dump("-*- UpdateTopLevelContentWindowIDHelper: " + s + "\n");
}
}
function _updateCurrentContentOuterWindowID(browser) {
if (
!browser.outerWindowID ||
browser.outerWindowID === _lastTopLevelWindowID ||
browser.ownerGlobal != _trackedWindows[0]
) {
return;
}
debug(
"Current window uri=" +
(browser.currentURI && browser.currentURI.spec) +
" id=" +
browser.outerWindowID
);
_lastTopLevelWindowID = browser.outerWindowID;
let windowIDWrapper = Cc["@mozilla.org/supports-PRUint64;1"].createInstance(
Ci.nsISupportsPRUint64
);
windowIDWrapper.data = _lastTopLevelWindowID;
Services.obs.notifyObservers(
windowIDWrapper,
"net:current-toplevel-outer-content-windowid"
);
}
function _handleEvent(event) {
switch (event.type) {
case "TabBrowserInserted":
if (
event.target.ownerGlobal.gBrowser.selectedBrowser ===
event.target.linkedBrowser
) {
_updateCurrentContentOuterWindowID(event.target.linkedBrowser);
}
break;
case "TabSelect":
_updateCurrentContentOuterWindowID(event.target.linkedBrowser);
break;
case "activate":
WindowHelper.onActivate(event.target);
break;
case "unload":
WindowHelper.removeWindow(event.currentTarget);
break;
}
}
function _trackWindowOrder(window) {
if (window.windowState == window.STATE_MINIMIZED) {
let firstMinimizedWindow = _trackedWindows.findIndex(
w => w.windowState == w.STATE_MINIMIZED
);
if (firstMinimizedWindow == -1) {
firstMinimizedWindow = _trackedWindows.length;
}
_trackedWindows.splice(firstMinimizedWindow, 0, window);
} else {
_trackedWindows.unshift(window);
}
}
function _untrackWindowOrder(window) {
let idx = _trackedWindows.indexOf(window);
if (idx >= 0) {
_trackedWindows.splice(idx, 1);
}
}
// Methods that impact a window. Put into single object for organization.
var WindowHelper = {
addWindow(window) {
// Add event listeners
TAB_EVENTS.forEach(function(event) {
window.gBrowser.tabContainer.addEventListener(event, _handleEvent);
});
WINDOW_EVENTS.forEach(function(event) {
window.addEventListener(event, _handleEvent);
});
_trackWindowOrder(window);
// Update the selected tab's content outer window ID.
_updateCurrentContentOuterWindowID(window.gBrowser.selectedBrowser);
},
removeWindow(window) {
_untrackWindowOrder(window);
// Remove the event listeners
TAB_EVENTS.forEach(function(event) {
window.gBrowser.tabContainer.removeEventListener(event, _handleEvent);
});
WINDOW_EVENTS.forEach(function(event) {
window.removeEventListener(event, _handleEvent);
});
},
onActivate(window) {
// If this window was the last focused window, we don't need to do anything
if (window == _trackedWindows[0]) {
return;
}
_untrackWindowOrder(window);
_trackWindowOrder(window);
_updateCurrentContentOuterWindowID(window.gBrowser.selectedBrowser);
},
};
this.BrowserWindowTracker = {
/**
* Get the most recent browser window.
*
* @param options an object accepting the arguments for the search.
* * private: true to restrict the search to private windows
* only, false to restrict the search to non-private only.
* Omit the property to search in both groups.
* * allowPopups: true if popup windows are permissable.
*/
getTopWindow(options = {}) {
for (let win of _trackedWindows) {
if (
!win.closed &&
(options.allowPopups || win.toolbar.visible) &&
(!("private" in options) ||
PrivateBrowsingUtils.permanentPrivateBrowsing ||
PrivateBrowsingUtils.isWindowPrivate(win) == options.private)
) {
return win;
}
}
return null;
},
windowCreated(browser) {
if (browser === browser.ownerGlobal.gBrowser.selectedBrowser) {
_updateCurrentContentOuterWindowID(browser);
}
},
/**
* Number of currently open browser windows.
*/
get windowCount() {
return _trackedWindows.length;
},
/**
* Array of browser windows ordered by z-index, in reverse order.
* This means that the top-most browser window will be the first item.
*/
get orderedWindows() {
// Clone the windows array immediately as it may change during iteration,
// we'd rather have an outdated order than skip/revisit windows.
return [..._trackedWindows];
},
getAllVisibleTabs() {
let tabs = [];
for (let win of BrowserWindowTracker.orderedWindows) {
for (let tab of win.gBrowser.visibleTabs) {
// Only use tabs which are not discarded / unrestored
if (tab.linkedPanel) {
let { contentTitle, browserId } = tab.linkedBrowser;
tabs.push({ contentTitle, browserId });
}
}
}
return tabs;
},
track(window) {
return WindowHelper.addWindow(window);
},
};
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