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gecko-dev/dom/base/nsWindowRoot.cpp

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/* -*- 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 "mozilla/BasicEvents.h"
#include "mozilla/EventDispatcher.h"
#include "mozilla/EventListenerManager.h"
#include "mozilla/dom/WindowRootBinding.h"
#include "nsCOMPtr.h"
#include "nsWindowRoot.h"
#include "nsPIDOMWindow.h"
#include "nsPresContext.h"
#include "nsLayoutCID.h"
#include "nsContentCID.h"
#include "nsString.h"
#include "nsGlobalWindow.h"
#include "nsFocusManager.h"
#include "nsIContent.h"
#include "nsIDOMHTMLInputElement.h"
#include "nsIDOMHTMLTextAreaElement.h"
#include "nsIControllers.h"
#include "nsIController.h"
#include "xpcpublic.h"
#include "nsCycleCollectionParticipant.h"
#include "mozilla/dom/TabParent.h"
#ifdef MOZ_XUL
#include "nsIDOMXULElement.h"
#endif
using namespace mozilla;
using namespace mozilla::dom;
nsWindowRoot::nsWindowRoot(nsPIDOMWindowOuter* aWindow)
{
mWindow = aWindow;
MOZ_ASSERT(mWindow->IsOuterWindow());
// Keyboard indicators are not shown on Mac by default.
#if defined(XP_MACOSX)
mShowAccelerators = false;
mShowFocusRings = false;
#else
mShowAccelerators = true;
mShowFocusRings = true;
#endif
}
nsWindowRoot::~nsWindowRoot()
{
if (mListenerManager) {
mListenerManager->Disconnect();
}
}
NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(nsWindowRoot,
mWindow,
mListenerManager,
mParent)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsWindowRoot)
NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIDOMEventTarget)
NS_INTERFACE_MAP_ENTRY(nsPIWindowRoot)
NS_INTERFACE_MAP_ENTRY(nsIDOMEventTarget)
NS_INTERFACE_MAP_ENTRY(mozilla::dom::EventTarget)
NS_INTERFACE_MAP_END
NS_IMPL_CYCLE_COLLECTING_ADDREF(nsWindowRoot)
NS_IMPL_CYCLE_COLLECTING_RELEASE(nsWindowRoot)
NS_IMPL_DOMTARGET_DEFAULTS(nsWindowRoot)
NS_IMETHODIMP
nsWindowRoot::RemoveEventListener(const nsAString& aType, nsIDOMEventListener* aListener, bool aUseCapture)
{
if (RefPtr<EventListenerManager> elm = GetExistingListenerManager()) {
elm->RemoveEventListener(aType, aListener, aUseCapture);
}
return NS_OK;
}
NS_IMPL_REMOVE_SYSTEM_EVENT_LISTENER(nsWindowRoot)
NS_IMETHODIMP
nsWindowRoot::DispatchEvent(nsIDOMEvent* aEvt, bool *aRetVal)
{
nsEventStatus status = nsEventStatus_eIgnore;
nsresult rv = EventDispatcher::DispatchDOMEvent(
static_cast<EventTarget*>(this), nullptr, aEvt, nullptr, &status);
*aRetVal = (status != nsEventStatus_eConsumeNoDefault);
return rv;
}
nsresult
nsWindowRoot::DispatchDOMEvent(WidgetEvent* aEvent,
nsIDOMEvent* aDOMEvent,
nsPresContext* aPresContext,
nsEventStatus* aEventStatus)
{
return EventDispatcher::DispatchDOMEvent(static_cast<EventTarget*>(this),
aEvent, aDOMEvent,
aPresContext, aEventStatus);
}
NS_IMETHODIMP
nsWindowRoot::AddEventListener(const nsAString& aType,
nsIDOMEventListener *aListener,
bool aUseCapture, bool aWantsUntrusted,
uint8_t aOptionalArgc)
{
NS_ASSERTION(!aWantsUntrusted || aOptionalArgc > 1,
"Won't check if this is chrome, you want to set "
"aWantsUntrusted to false or make the aWantsUntrusted "
"explicit by making optional_argc non-zero.");
EventListenerManager* elm = GetOrCreateListenerManager();
NS_ENSURE_STATE(elm);
elm->AddEventListener(aType, aListener, aUseCapture, aWantsUntrusted);
return NS_OK;
}
void
nsWindowRoot::AddEventListener(const nsAString& aType,
EventListener* aListener,
const AddEventListenerOptionsOrBoolean& aOptions,
const Nullable<bool>& aWantsUntrusted,
ErrorResult& aRv)
{
bool wantsUntrusted = !aWantsUntrusted.IsNull() && aWantsUntrusted.Value();
EventListenerManager* elm = GetOrCreateListenerManager();
if (!elm) {
aRv.Throw(NS_ERROR_UNEXPECTED);
return;
}
elm->AddEventListener(aType, aListener, aOptions, wantsUntrusted);
}
NS_IMETHODIMP
nsWindowRoot::AddSystemEventListener(const nsAString& aType,
nsIDOMEventListener *aListener,
bool aUseCapture,
bool aWantsUntrusted,
uint8_t aOptionalArgc)
{
NS_ASSERTION(!aWantsUntrusted || aOptionalArgc > 1,
"Won't check if this is chrome, you want to set "
"aWantsUntrusted to false or make the aWantsUntrusted "
"explicit by making optional_argc non-zero.");
return NS_AddSystemEventListener(this, aType, aListener, aUseCapture,
aWantsUntrusted);
}
EventListenerManager*
nsWindowRoot::GetOrCreateListenerManager()
{
if (!mListenerManager) {
mListenerManager =
new EventListenerManager(static_cast<EventTarget*>(this));
}
return mListenerManager;
}
EventListenerManager*
nsWindowRoot::GetExistingListenerManager() const
{
return mListenerManager;
}
nsIScriptContext*
nsWindowRoot::GetContextForEventHandlers(nsresult* aRv)
{
*aRv = NS_OK;
return nullptr;
}
nsresult
nsWindowRoot::PreHandleEvent(EventChainPreVisitor& aVisitor)
{
aVisitor.mCanHandle = true;
aVisitor.mForceContentDispatch = true; //FIXME! Bug 329119
// To keep mWindow alive
aVisitor.mItemData = static_cast<nsISupports *>(mWindow);
aVisitor.mParentTarget = mParent;
return NS_OK;
}
nsresult
nsWindowRoot::PostHandleEvent(EventChainPostVisitor& aVisitor)
{
return NS_OK;
}
nsPIDOMWindowOuter*
nsWindowRoot::GetOwnerGlobalForBindings()
{
return GetWindow();
}
nsIGlobalObject*
nsWindowRoot::GetOwnerGlobal() const
{
nsCOMPtr<nsIGlobalObject> global =
do_QueryInterface(mWindow->GetCurrentInnerWindow());
// We're still holding a ref to it, so returning the raw pointer is ok...
return global;
}
nsPIDOMWindowOuter*
nsWindowRoot::GetWindow()
{
return mWindow;
}
nsresult
nsWindowRoot::GetControllers(nsIControllers** aResult)
{
*aResult = nullptr;
// XXX: we should fix this so there's a generic interface that
// describes controllers, so this code would have no special
// knowledge of what object might have controllers.
nsCOMPtr<nsPIDOMWindowOuter> focusedWindow;
nsIContent* focusedContent =
nsFocusManager::GetFocusedDescendant(mWindow, true, getter_AddRefs(focusedWindow));
if (focusedContent) {
#ifdef MOZ_XUL
nsCOMPtr<nsIDOMXULElement> xulElement(do_QueryInterface(focusedContent));
if (xulElement)
return xulElement->GetControllers(aResult);
#endif
nsCOMPtr<nsIDOMHTMLTextAreaElement> htmlTextArea =
do_QueryInterface(focusedContent);
if (htmlTextArea)
return htmlTextArea->GetControllers(aResult);
nsCOMPtr<nsIDOMHTMLInputElement> htmlInputElement =
do_QueryInterface(focusedContent);
if (htmlInputElement)
return htmlInputElement->GetControllers(aResult);
if (focusedContent->IsEditable() && focusedWindow)
return focusedWindow->GetControllers(aResult);
}
else {
return focusedWindow->GetControllers(aResult);
}
return NS_OK;
}
nsresult
nsWindowRoot::GetControllerForCommand(const char * aCommand,
nsIController** _retval)
{
NS_ENSURE_ARG_POINTER(_retval);
*_retval = nullptr;
{
nsCOMPtr<nsIControllers> controllers;
GetControllers(getter_AddRefs(controllers));
if (controllers) {
nsCOMPtr<nsIController> controller;
controllers->GetControllerForCommand(aCommand, getter_AddRefs(controller));
if (controller) {
controller.forget(_retval);
return NS_OK;
}
}
}
nsCOMPtr<nsPIDOMWindowOuter> focusedWindow;
nsFocusManager::GetFocusedDescendant(mWindow, true, getter_AddRefs(focusedWindow));
while (focusedWindow) {
nsCOMPtr<nsIControllers> controllers;
focusedWindow->GetControllers(getter_AddRefs(controllers));
if (controllers) {
nsCOMPtr<nsIController> controller;
controllers->GetControllerForCommand(aCommand,
getter_AddRefs(controller));
if (controller) {
controller.forget(_retval);
return NS_OK;
}
}
// XXXndeakin P3 is this casting safe?
nsGlobalWindow *win = nsGlobalWindow::Cast(focusedWindow);
focusedWindow = win->GetPrivateParent();
}
return NS_OK;
}
void
nsWindowRoot::GetEnabledDisabledCommandsForControllers(nsIControllers* aControllers,
nsTHashtable<nsCharPtrHashKey>& aCommandsHandled,
nsTArray<nsCString>& aEnabledCommands,
nsTArray<nsCString>& aDisabledCommands)
{
uint32_t controllerCount;
aControllers->GetControllerCount(&controllerCount);
for (uint32_t c = 0; c < controllerCount; c++) {
nsCOMPtr<nsIController> controller;
aControllers->GetControllerAt(c, getter_AddRefs(controller));
nsCOMPtr<nsICommandController> commandController(do_QueryInterface(controller));
if (commandController) {
uint32_t commandsCount;
char** commands;
if (NS_SUCCEEDED(commandController->GetSupportedCommands(&commandsCount, &commands))) {
for (uint32_t e = 0; e < commandsCount; e++) {
// Use a hash to determine which commands have already been handled by
// earlier controllers, as the earlier controller's result should get
// priority.
if (!aCommandsHandled.Contains(commands[e])) {
aCommandsHandled.PutEntry(commands[e]);
bool enabled = false;
controller->IsCommandEnabled(commands[e], &enabled);
const nsDependentCSubstring commandStr(commands[e], strlen(commands[e]));
if (enabled) {
aEnabledCommands.AppendElement(commandStr);
} else {
aDisabledCommands.AppendElement(commandStr);
}
}
}
NS_FREE_XPCOM_ALLOCATED_POINTER_ARRAY(commandsCount, commands);
}
}
}
}
void
nsWindowRoot::GetEnabledDisabledCommands(nsTArray<nsCString>& aEnabledCommands,
nsTArray<nsCString>& aDisabledCommands)
{
nsTHashtable<nsCharPtrHashKey> commandsHandled;
nsCOMPtr<nsIControllers> controllers;
GetControllers(getter_AddRefs(controllers));
if (controllers) {
GetEnabledDisabledCommandsForControllers(controllers, commandsHandled,
aEnabledCommands, aDisabledCommands);
}
nsCOMPtr<nsPIDOMWindowOuter> focusedWindow;
nsFocusManager::GetFocusedDescendant(mWindow, true, getter_AddRefs(focusedWindow));
while (focusedWindow) {
focusedWindow->GetControllers(getter_AddRefs(controllers));
if (controllers) {
GetEnabledDisabledCommandsForControllers(controllers, commandsHandled,
aEnabledCommands, aDisabledCommands);
}
nsGlobalWindow* win = nsGlobalWindow::Cast(focusedWindow);
focusedWindow = win->GetPrivateParent();
}
}
nsIDOMNode*
nsWindowRoot::GetPopupNode()
{
nsCOMPtr<nsIDOMNode> popupNode = do_QueryReferent(mPopupNode);
return popupNode;
}
void
nsWindowRoot::SetPopupNode(nsIDOMNode* aNode)
{
mPopupNode = do_GetWeakReference(aNode);
}
nsIGlobalObject*
nsWindowRoot::GetParentObject()
{
return xpc::NativeGlobal(xpc::PrivilegedJunkScope());
}
JSObject*
nsWindowRoot::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
{
return mozilla::dom::WindowRootBinding::Wrap(aCx, this, aGivenProto);
}
void
nsWindowRoot::AddBrowser(mozilla::dom::TabParent* aBrowser)
{
nsWeakPtr weakBrowser = do_GetWeakReference(static_cast<nsITabParent*>(aBrowser));
mWeakBrowsers.PutEntry(weakBrowser);
}
void
nsWindowRoot::RemoveBrowser(mozilla::dom::TabParent* aBrowser)
{
nsWeakPtr weakBrowser = do_GetWeakReference(static_cast<nsITabParent*>(aBrowser));
mWeakBrowsers.RemoveEntry(weakBrowser);
}
void
nsWindowRoot::EnumerateBrowsers(BrowserEnumerator aEnumFunc, void* aArg)
{
// Collect strong references to all browsers in a separate array in
// case aEnumFunc alters mWeakBrowsers.
nsTArray<RefPtr<TabParent>> tabParents;
for (auto iter = mWeakBrowsers.ConstIter(); !iter.Done(); iter.Next()) {
nsCOMPtr<nsITabParent> tabParent(do_QueryReferent(iter.Get()->GetKey()));
if (TabParent* tab = TabParent::GetFrom(tabParent)) {
tabParents.AppendElement(tab);
}
}
for (uint32_t i = 0; i < tabParents.Length(); ++i) {
aEnumFunc(tabParents[i], aArg);
}
}
///////////////////////////////////////////////////////////////////////////////////
already_AddRefed<EventTarget>
NS_NewWindowRoot(nsPIDOMWindowOuter* aWindow)
{
nsCOMPtr<EventTarget> result = new nsWindowRoot(aWindow);
return result.forget();
}
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