tenfourfox/dom/browser-element/BrowserElementParent.cpp

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2017-04-19 07:56:45 +00:00
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=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/. */
#include "TabParent.h"
// TabParent.h transitively includes <windows.h>, which does
// #define CreateEvent CreateEventW
// That messes up our call to EventDispatcher::CreateEvent below.
#ifdef CreateEvent
#undef CreateEvent
#endif
#include "BrowserElementParent.h"
#include "BrowserElementAudioChannel.h"
#include "mozilla/EventDispatcher.h"
#include "mozilla/dom/HTMLIFrameElement.h"
#include "mozilla/dom/ToJSValue.h"
#include "nsIInterfaceRequestorUtils.h"
#include "nsVariant.h"
#include "mozilla/dom/BrowserElementDictionariesBinding.h"
#include "mozilla/dom/CustomEvent.h"
using namespace mozilla;
using namespace mozilla::dom;
namespace {
using mozilla::BrowserElementParent;
/**
* Create an <iframe mozbrowser> owned by the same document as
* aOpenerFrameElement.
*/
already_AddRefed<HTMLIFrameElement>
CreateIframe(Element* aOpenerFrameElement, const nsAString& aName, bool aRemote)
{
nsNodeInfoManager *nodeInfoManager =
aOpenerFrameElement->OwnerDoc()->NodeInfoManager();
RefPtr<NodeInfo> nodeInfo =
nodeInfoManager->GetNodeInfo(nsGkAtoms::iframe,
/* aPrefix = */ nullptr,
kNameSpaceID_XHTML,
nsIDOMNode::ELEMENT_NODE);
RefPtr<HTMLIFrameElement> popupFrameElement =
static_cast<HTMLIFrameElement*>(
NS_NewHTMLIFrameElement(nodeInfo.forget(), mozilla::dom::NOT_FROM_PARSER));
popupFrameElement->SetMozbrowser(true);
// Copy the opener frame's mozapp attribute to the popup frame.
if (aOpenerFrameElement->HasAttr(kNameSpaceID_None, nsGkAtoms::mozapp)) {
nsAutoString mozapp;
aOpenerFrameElement->GetAttr(kNameSpaceID_None, nsGkAtoms::mozapp, mozapp);
popupFrameElement->SetAttr(kNameSpaceID_None, nsGkAtoms::mozapp,
mozapp, /* aNotify = */ false);
}
// Copy the opener frame's parentApp attribute to the popup frame.
if (aOpenerFrameElement->HasAttr(kNameSpaceID_None, nsGkAtoms::parentapp)) {
nsAutoString parentApp;
aOpenerFrameElement->GetAttr(kNameSpaceID_None, nsGkAtoms::parentapp,
parentApp);
popupFrameElement->SetAttr(kNameSpaceID_None, nsGkAtoms::parentapp,
parentApp, /* aNotify = */ false);
}
// Copy the window name onto the iframe.
popupFrameElement->SetAttr(kNameSpaceID_None, nsGkAtoms::name,
aName, /* aNotify = */ false);
// Indicate whether the iframe is should be remote.
popupFrameElement->SetAttr(kNameSpaceID_None, nsGkAtoms::Remote,
aRemote ? NS_LITERAL_STRING("true") :
NS_LITERAL_STRING("false"),
/* aNotify = */ false);
// Copy the opener frame's mozprivatebrowsing attribute to the popup frame.
nsAutoString mozprivatebrowsing;
if (aOpenerFrameElement->GetAttr(kNameSpaceID_None, nsGkAtoms::mozprivatebrowsing,
mozprivatebrowsing)) {
popupFrameElement->SetAttr(kNameSpaceID_None, nsGkAtoms::mozprivatebrowsing,
mozprivatebrowsing, /* aNotify = */ false);
}
return popupFrameElement.forget();
}
bool
DispatchCustomDOMEvent(Element* aFrameElement, const nsAString& aEventName,
JSContext* cx, JS::Handle<JS::Value> aDetailValue,
nsEventStatus *aStatus)
{
NS_ENSURE_TRUE(aFrameElement, false);
nsIPresShell *shell = aFrameElement->OwnerDoc()->GetShell();
RefPtr<nsPresContext> presContext;
if (shell) {
presContext = shell->GetPresContext();
}
RefPtr<CustomEvent> event =
NS_NewDOMCustomEvent(aFrameElement, presContext, nullptr);
ErrorResult res;
event->InitCustomEvent(cx,
aEventName,
/* bubbles = */ true,
/* cancelable = */ true,
aDetailValue,
res);
if (res.Failed()) {
return false;
}
event->SetTrusted(true);
// Dispatch the event.
// We don't initialize aStatus here, as our callers have already done so.
nsresult rv =
EventDispatcher::DispatchDOMEvent(aFrameElement, nullptr, event,
presContext, aStatus);
return NS_SUCCEEDED(rv);
}
} // namespace
namespace mozilla {
/**
* Dispatch a mozbrowseropenwindow event to the given opener frame element.
* The "popup iframe" (event.detail.frameElement) will be |aPopupFrameElement|.
*
* Returns true iff there were no unexpected failures and the window.open call
* was accepted by the embedder.
*/
/*static*/
BrowserElementParent::OpenWindowResult
BrowserElementParent::DispatchOpenWindowEvent(Element* aOpenerFrameElement,
Element* aPopupFrameElement,
const nsAString& aURL,
const nsAString& aName,
const nsAString& aFeatures)
{
// Dispatch a CustomEvent at aOpenerFrameElement with a detail object
// (OpenWindowEventDetail) containing aPopupFrameElement, aURL, aName, and
// aFeatures.
// Create the event's detail object.
OpenWindowEventDetail detail;
if (aURL.IsEmpty()) {
// URL should never be empty. Assign about:blank as default.
detail.mUrl = NS_LITERAL_STRING("about:blank");
} else {
detail.mUrl = aURL;
}
detail.mName = aName;
detail.mFeatures = aFeatures;
detail.mFrameElement = aPopupFrameElement;
AutoJSContext cx;
JS::Rooted<JS::Value> val(cx);
nsIGlobalObject* sgo = aPopupFrameElement->OwnerDoc()->GetScopeObject();
if (!sgo) {
return BrowserElementParent::OPEN_WINDOW_IGNORED;
}
JS::Rooted<JSObject*> global(cx, sgo->GetGlobalJSObject());
JSAutoCompartment ac(cx, global);
if (!ToJSValue(cx, detail, &val)) {
MOZ_CRASH("Failed to convert dictionary to JS::Value due to OOM.");
return BrowserElementParent::OPEN_WINDOW_IGNORED;
}
// Do not dispatch a mozbrowseropenwindow event of a widget to its embedder
nsCOMPtr<nsIMozBrowserFrame> browserFrame =
do_QueryInterface(aOpenerFrameElement);
if (browserFrame && browserFrame->GetReallyIsWidget()) {
return BrowserElementParent::OPEN_WINDOW_CANCELLED;
}
nsEventStatus status = nsEventStatus_eIgnore;
bool dispatchSucceeded =
DispatchCustomDOMEvent(aOpenerFrameElement,
NS_LITERAL_STRING("mozbrowseropenwindow"),
cx,
val, &status);
if (dispatchSucceeded) {
if (aPopupFrameElement->IsInDoc()) {
return BrowserElementParent::OPEN_WINDOW_ADDED;
} else if (status == nsEventStatus_eConsumeNoDefault) {
// If the frame was not added to a document, report to callers whether
// preventDefault was called on or not
return BrowserElementParent::OPEN_WINDOW_CANCELLED;
}
}
return BrowserElementParent::OPEN_WINDOW_IGNORED;
}
/*static*/
BrowserElementParent::OpenWindowResult
BrowserElementParent::OpenWindowOOP(TabParent* aOpenerTabParent,
TabParent* aPopupTabParent,
const nsAString& aURL,
const nsAString& aName,
const nsAString& aFeatures)
{
// Create an iframe owned by the same document which owns openerFrameElement.
nsCOMPtr<Element> openerFrameElement = aOpenerTabParent->GetOwnerElement();
NS_ENSURE_TRUE(openerFrameElement,
BrowserElementParent::OPEN_WINDOW_IGNORED);
RefPtr<HTMLIFrameElement> popupFrameElement =
CreateIframe(openerFrameElement, aName, /* aRemote = */ true);
// Normally an <iframe> element will try to create a frameLoader when the
// page touches iframe.contentWindow or sets iframe.src.
//
// But in our case, we want to delay the creation of the frameLoader until
// we've verified that the popup has gone through successfully. If the popup
// is "blocked" by the embedder, we don't want to load the popup's url.
//
// Therefore we call DisallowCreateFrameLoader() on the element and call
// AllowCreateFrameLoader() only after we've verified that the popup was
// allowed.
popupFrameElement->DisallowCreateFrameLoader();
OpenWindowResult opened =
DispatchOpenWindowEvent(openerFrameElement, popupFrameElement,
aURL, aName, aFeatures);
if (opened != BrowserElementParent::OPEN_WINDOW_ADDED) {
return opened;
}
// The popup was not blocked, so hook up the frame element and the popup tab
// parent, and return success.
aPopupTabParent->SetOwnerElement(popupFrameElement);
popupFrameElement->AllowCreateFrameLoader();
popupFrameElement->CreateRemoteFrameLoader(aPopupTabParent);
return opened;
}
/* static */
BrowserElementParent::OpenWindowResult
BrowserElementParent::OpenWindowInProcess(nsIDOMWindow* aOpenerWindow,
nsIURI* aURI,
const nsAString& aName,
const nsACString& aFeatures,
nsIDOMWindow** aReturnWindow)
{
*aReturnWindow = nullptr;
// If we call window.open from an <iframe> inside an <iframe mozbrowser>,
// it's as though the top-level document inside the <iframe mozbrowser>
// called window.open. (Indeed, in the OOP case, the inner <iframe> lives
// out-of-process, so we couldn't touch it if we tried.)
//
// GetScriptableTop gets us the <iframe mozbrowser>'s window; we'll use its
// frame element, rather than aOpenerWindow's frame element, as our "opener
// frame element" below.
nsCOMPtr<nsPIDOMWindow> openerWindow = do_QueryInterface(aOpenerWindow);
nsCOMPtr<nsPIDOMWindow> win = openerWindow->GetScriptableTop();
nsCOMPtr<Element> openerFrameElement = win->GetFrameElementInternal();
NS_ENSURE_TRUE(openerFrameElement, BrowserElementParent::OPEN_WINDOW_IGNORED);
RefPtr<HTMLIFrameElement> popupFrameElement =
CreateIframe(openerFrameElement, aName, /* aRemote = */ false);
NS_ENSURE_TRUE(popupFrameElement, BrowserElementParent::OPEN_WINDOW_IGNORED);
nsAutoCString spec;
if (aURI) {
aURI->GetSpec(spec);
}
OpenWindowResult opened =
DispatchOpenWindowEvent(openerFrameElement, popupFrameElement,
NS_ConvertUTF8toUTF16(spec),
aName,
NS_ConvertUTF8toUTF16(aFeatures));
if (opened != BrowserElementParent::OPEN_WINDOW_ADDED) {
return opened;
}
// Return popupFrameElement's window.
nsCOMPtr<nsIFrameLoader> frameLoader;
popupFrameElement->GetFrameLoader(getter_AddRefs(frameLoader));
NS_ENSURE_TRUE(frameLoader, BrowserElementParent::OPEN_WINDOW_IGNORED);
nsCOMPtr<nsIDocShell> docshell;
frameLoader->GetDocShell(getter_AddRefs(docshell));
NS_ENSURE_TRUE(docshell, BrowserElementParent::OPEN_WINDOW_IGNORED);
nsCOMPtr<nsIDOMWindow> window = docshell->GetWindow();
window.forget(aReturnWindow);
return !!*aReturnWindow ? opened : BrowserElementParent::OPEN_WINDOW_CANCELLED;
}
} // namespace mozilla