gecko-dev/dom/browser-element/BrowserElementParent.h
Justin Lebar 8d7f4a897e Bug 742944 - Part 4: Handle window.open in <iframe mozbrowser>. r=bz, cjones
--HG--
extra : rebase_source : 4c16c86c5be230af22eea89dfb5f893b7c6091dd
2012-06-12 18:01:25 -04:00

90 lines
3.2 KiB
C++

/* 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/. */
#ifndef mozilla_BrowserElementHelpers_h
#define mozilla_BrowserElementHelpers_h
#include "nsAString.h"
class nsIDOMWindow;
class nsIURI;
namespace mozilla {
namespace dom {
class TabParent;
}
/**
* BrowserElementParent implements a portion of the parent-process side of
* <iframe mozbrowser>.
*
* Most of the parent-process side of <iframe mozbrowser> is implemented in
* BrowserElementParent.js. This file implements the few parts of this
* functionality which must be written in C++.
*
* We don't communicate with the JS code that lives in BrowserElementParent.js;
* the JS and C++ parts are completely separate.
*/
class BrowserElementParent
{
public:
/**
* Handle a window.open call from an out-of-process <iframe mozbrowser>.
*
* window.open inside <iframe mozbrowser> doesn't actually open a new
* top-level window. Instead, the "embedder" (the document which contains
* the <iframe mozbrowser> whose content called window.open) gets the
* opportunity to place a new <iframe mozbrowser> in the DOM somewhere. This
* new "popup" iframe acts as the opened window.
*
* This method proceeds in three steps.
*
* 1) We fire a mozbrowseropenwindow CustomEvent on the opener
* iframe element. This event's detail is an instance of
* nsIOpenWindowEventDetail.
*
* 2) The embedder (the document which contains the opener iframe) can accept
* the window.open request by inserting event.detail.frameElement (an iframe
* element) into the DOM somewhere.
*
* 3) If the embedder accepted the window.open request, we return true and
* set aPopupTabParent's frame element to event.detail.frameElement.
* Otherwise, we return false.
*
* @param aOpenerTabParent the TabParent whose TabChild called window.open.
* @param aPopupTabParent the TabParent inside which the opened window will
* live.
* @return true on success, false otherwise. Failure is not (necessarily)
* an error; it may indicate that the embedder simply rejected the
* window.open request.
*/
static bool
OpenWindowOOP(mozilla::dom::TabParent* aOpenerTabParent,
mozilla::dom::TabParent* aPopupTabParent,
const nsAString& aURL,
const nsAString& aName,
const nsAString& aFeatures);
/**
* Handle a window.open call from an in-process <iframe mozbrowser>.
*
* As with OpenWindowOOP, we return true if the window.open request
* succeeded, and return false if the embedder denied the request.
*
* (These parameter types are silly, but they match what our caller has in
* hand. Feel free to add an override, if they are inconvenient to you.)
*/
static bool
OpenWindowInProcess(nsIDOMWindow* aOpenerWindow,
nsIURI* aURI,
const nsAString& aName,
const nsACString& aFeatures,
nsIDOMWindow** aReturnWindow);
};
} // namespace mozilla
#endif