gecko-dev/dom/browser-element/BrowserElementParent.cpp

261 строка
9.7 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/. */
#include "TabParent.h"
// TabParent.h transitively includes <windows.h>, which does
// #define CreateEvent CreateEventW
// That messes up our call to nsEventDispatcher::CreateEvent below.
#ifdef CreateEvent
#undef CreateEvent
#endif
#include "BrowserElementParent.h"
#include "nsHTMLIFrameElement.h"
#include "nsOpenWindowEventDetail.h"
#include "nsEventDispatcher.h"
#include "nsIDOMCustomEvent.h"
#include "nsIInterfaceRequestorUtils.h"
#include "nsVariant.h"
#include "nsAsyncScrollEventDetail.h"
using mozilla::dom::Element;
using mozilla::dom::TabParent;
namespace {
/**
* Create an <iframe mozbrowser> owned by the same document as
* aOpenerFrameElement.
*/
already_AddRefed<nsHTMLIFrameElement>
CreateIframe(Element* aOpenerFrameElement, const nsAString& aName, bool aRemote)
{
nsNodeInfoManager *nodeInfoManager =
aOpenerFrameElement->OwnerDoc()->NodeInfoManager();
nsCOMPtr<nsINodeInfo> nodeInfo =
nodeInfoManager->GetNodeInfo(nsGkAtoms::iframe,
/* aPrefix = */ nullptr,
kNameSpaceID_XHTML,
nsIDOMNode::ELEMENT_NODE);
nsRefPtr<nsHTMLIFrameElement> popupFrameElement =
static_cast<nsHTMLIFrameElement*>(
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 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);
return popupFrameElement.forget();
}
bool
DispatchCustomDOMEvent(Element* aFrameElement, const nsAString& aEventName,
nsISupports *aDetailValue)
{
NS_ENSURE_TRUE(aFrameElement, false);
nsIPresShell *shell = aFrameElement->OwnerDoc()->GetShell();
nsRefPtr<nsPresContext> presContext;
if (shell) {
presContext = shell->GetPresContext();
}
nsCOMPtr<nsIDOMEvent> domEvent;
nsEventDispatcher::CreateEvent(presContext, nullptr,
NS_LITERAL_STRING("customevent"),
getter_AddRefs(domEvent));
NS_ENSURE_TRUE(domEvent, false);
nsCOMPtr<nsIWritableVariant> detailVariant = new nsVariant();
nsresult rv = detailVariant->SetAsISupports(aDetailValue);
NS_ENSURE_SUCCESS(rv, false);
nsCOMPtr<nsIDOMCustomEvent> customEvent = do_QueryInterface(domEvent);
NS_ENSURE_TRUE(customEvent, false);
customEvent->InitCustomEvent(aEventName,
/* bubbles = */ true,
/* cancelable = */ false,
detailVariant);
customEvent->SetTrusted(true);
// Dispatch the event.
nsEventStatus status = nsEventStatus_eIgnore;
rv = nsEventDispatcher::DispatchDOMEvent(aFrameElement, nullptr,
domEvent, presContext, &status);
return NS_SUCCEEDED(rv);
}
/**
* 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.
*/
bool
DispatchOpenWindowEvent(Element* aOpenerFrameElement,
Element* aPopupFrameElement,
const nsAString& aURL,
const nsAString& aName,
const nsAString& aFeatures)
{
// Dispatch a CustomEvent at aOpenerFrameElement with a detail object
// (nsIOpenWindowEventDetail) containing aPopupFrameElement, aURL, aName, and
// aFeatures.
// Create the event's detail object.
nsRefPtr<nsOpenWindowEventDetail> detail =
new nsOpenWindowEventDetail(aURL, aName, aFeatures,
aPopupFrameElement->AsDOMNode());
bool dispatchSucceeded =
DispatchCustomDOMEvent(aOpenerFrameElement,
NS_LITERAL_STRING("mozbrowseropenwindow"),
detail);
// If the iframe is not in some document's DOM at this point, the embedder
// has "blocked" the popup.
return (dispatchSucceeded && aPopupFrameElement->IsInDoc());
}
} // anonymous namespace
namespace mozilla {
/*static*/ bool
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 =
do_QueryInterface(aOpenerTabParent->GetOwnerElement());
NS_ENSURE_TRUE(openerFrameElement, false);
nsRefPtr<nsHTMLIFrameElement> 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();
bool dispatchSucceeded =
DispatchOpenWindowEvent(openerFrameElement, popupFrameElement,
aURL, aName, aFeatures);
if (!dispatchSucceeded) {
return false;
}
// 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 true;
}
/* static */ bool
BrowserElementParent::OpenWindowInProcess(nsIDOMWindow* aOpenerWindow,
nsIURI* aURI,
const nsAString& aName,
const nsACString& aFeatures,
nsIDOMWindow** aReturnWindow)
{
*aReturnWindow = NULL;
// 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<nsIDOMWindow> topWindow;
aOpenerWindow->GetScriptableTop(getter_AddRefs(topWindow));
nsCOMPtr<nsIDOMElement> openerFrameDOMElement;
topWindow->GetFrameElement(getter_AddRefs(openerFrameDOMElement));
NS_ENSURE_TRUE(openerFrameDOMElement, false);
nsCOMPtr<Element> openerFrameElement =
do_QueryInterface(openerFrameDOMElement);
nsRefPtr<nsHTMLIFrameElement> popupFrameElement =
CreateIframe(openerFrameElement, aName, /* aRemote = */ false);
NS_ENSURE_TRUE(popupFrameElement, false);
nsAutoCString spec;
if (aURI) {
aURI->GetSpec(spec);
}
bool dispatchSucceeded =
DispatchOpenWindowEvent(openerFrameElement, popupFrameElement,
NS_ConvertUTF8toUTF16(spec),
aName,
NS_ConvertUTF8toUTF16(aFeatures));
if (!dispatchSucceeded) {
return false;
}
// Return popupFrameElement's window.
nsCOMPtr<nsIFrameLoader> frameLoader;
popupFrameElement->GetFrameLoader(getter_AddRefs(frameLoader));
NS_ENSURE_TRUE(frameLoader, false);
nsCOMPtr<nsIDocShell> docshell;
frameLoader->GetDocShell(getter_AddRefs(docshell));
NS_ENSURE_TRUE(docshell, false);
nsCOMPtr<nsIDOMWindow> window = do_GetInterface(docshell);
window.forget(aReturnWindow);
return !!*aReturnWindow;
}
bool
BrowserElementParent::DispatchAsyncScrollEvent(TabParent* aTabParent,
const gfx::Rect& aContentRect,
const gfx::Size& aContentSize)
{
nsIDOMElement* element = aTabParent->GetOwnerElement();
nsCOMPtr<Element> frameElement = do_QueryInterface(element);
// Create the event's detail object.
nsRefPtr<nsAsyncScrollEventDetail> detail =
new nsAsyncScrollEventDetail(aContentRect.x, aContentRect.y,
aContentRect.width, aContentRect.height,
aContentSize.width, aContentSize.height);
return DispatchCustomDOMEvent(frameElement,
NS_LITERAL_STRING("mozbrowserasyncscroll"),
detail);
}
} // namespace mozilla