gecko-dev/browser/components/tabview/content.js

83 lines
2.8 KiB
JavaScript

/* 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";
let Cu = Components.utils;
Cu.import("resource:///modules/tabview/utils.jsm");
// Bug 671101 - directly using webProgress in this context
// causes docShells to leak
this.__defineGetter__("webProgress", function () {
let ifaceReq = docShell.QueryInterface(Ci.nsIInterfaceRequestor);
return ifaceReq.getInterface(Ci.nsIWebProgress);
});
// ----------
// WindowEventHandler
//
// Handles events dispatched by the content window.
let WindowEventHandler = {
// ----------
// Function: onDOMWillOpenModalDialog
// Sends a synchronous message when the "onDOMWillOpenModalDialog" event
// is fired right before a modal dialog will be opened by the current page.
onDOMWillOpenModalDialog: function WEH_onDOMWillOpenModalDialog(event) {
// (event.isTrusted == true) when the event is generated by a user action
// and does not originate from a script.
if (!event.isTrusted)
return;
// we're intentionally sending a synchronous message to handle this event
// as quick as possible, switch the selected tab and hide the tabview
// before the modal dialog is shown
sendSyncMessage("Panorama:DOMWillOpenModalDialog");
},
// ----------
// Function: onMozAfterPaint
// Sends an asynchronous message when the "onMozAfterPaint" event
// is fired.
onMozAfterPaint: function WEH_onMozAfterPaint(event) {
if (event.clientRects.length > 0) {
sendAsyncMessage("Panorama:MozAfterPaint");
}
}
};
// add event listeners
addEventListener("DOMWillOpenModalDialog", WindowEventHandler.onDOMWillOpenModalDialog, false);
addEventListener("MozAfterPaint", WindowEventHandler.onMozAfterPaint, false);
// ----------
// WindowMessageHandler
//
// Handles messages sent by the chrome process.
let WindowMessageHandler = {
// ----------
// Function: isDocumentLoaded
// Checks if the currently active document is loaded.
isDocumentLoaded: function WMH_isDocumentLoaded(cx) {
let isLoaded = (content.document.readyState != "uninitialized" &&
!webProgress.isLoadingDocument);
sendAsyncMessage(cx.name, {isLoaded: isLoaded});
},
// ----------
// Function: isImageDocument
// Checks if the currently active document is an image document or not.
isImageDocument: function WMH_isImageDocument(cx) {
let isImageDocument = (content.document instanceof Ci.nsIImageDocument);
sendAsyncMessage(cx.name, {isImageDocument: isImageDocument});
}
};
// add message listeners
addMessageListener("Panorama:isDocumentLoaded", WindowMessageHandler.isDocumentLoaded);
addMessageListener("Panorama:isImageDocument", WindowMessageHandler.isImageDocument);