gecko/dom/base/nsScreen.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2012-05-21 04:12:37 -07:00
/* 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/Hal.h"
#include "nsScreen.h"
#include "nsIDocShell.h"
#include "nsPresContext.h"
#include "nsCOMPtr.h"
#include "nsDOMClassInfoID.h"
#include "nsIDocShellTreeItem.h"
#include "nsLayoutUtils.h"
#include "nsDOMEvent.h"
#include "nsGlobalWindow.h"
using namespace mozilla;
using namespace mozilla::dom;
namespace {
bool
IsChromeType(nsIDocShell *aDocShell)
{
nsCOMPtr<nsIDocShellTreeItem> ds = do_QueryInterface(aDocShell);
if (!ds) {
return false;
}
PRInt32 itemType;
ds->GetItemType(&itemType);
return itemType == nsIDocShellTreeItem::typeChrome;
}
} // anonymous namespace
/* static */ already_AddRefed<nsScreen>
nsScreen::Create(nsPIDOMWindow* aWindow)
{
MOZ_ASSERT(aWindow);
if (!aWindow->GetDocShell()) {
return nsnull;
}
nsCOMPtr<nsIScriptGlobalObject> sgo =
do_QueryInterface(static_cast<nsPIDOMWindow*>(aWindow));
NS_ENSURE_TRUE(sgo, nsnull);
nsRefPtr<nsScreen> screen = new nsScreen();
screen->BindToOwner(aWindow);
hal::RegisterScreenConfigurationObserver(screen);
hal::ScreenConfiguration config;
hal::GetCurrentScreenConfiguration(&config);
screen->mOrientation = config.orientation();
return screen.forget();
}
nsScreen::nsScreen()
: mEventListener(nsnull)
{
}
void
nsScreen::Reset()
{
hal::UnlockScreenOrientation();
if (mEventListener) {
nsCOMPtr<nsIDOMEventTarget> target = do_QueryInterface(GetOwner());
if (target) {
target->RemoveSystemEventListener(NS_LITERAL_STRING("mozfullscreenchange"),
mEventListener, true);
}
mEventListener = nsnull;
}
}
nsScreen::~nsScreen()
{
Reset();
hal::UnregisterScreenConfigurationObserver(this);
}
DOMCI_DATA(Screen, nsScreen)
NS_IMPL_CYCLE_COLLECTION_CLASS(nsScreen)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(nsScreen,
nsDOMEventTargetHelper)
NS_CYCLE_COLLECTION_TRAVERSE_EVENT_HANDLER(mozorientationchange)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(nsScreen,
nsDOMEventTargetHelper)
NS_CYCLE_COLLECTION_UNLINK_EVENT_HANDLER(mozorientationchange)
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
// QueryInterface implementation for nsScreen
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(nsScreen)
NS_INTERFACE_MAP_ENTRY(nsIDOMScreen)
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIDOMScreen)
NS_DOM_INTERFACE_MAP_ENTRY_CLASSINFO(Screen)
NS_INTERFACE_MAP_END_INHERITING(nsDOMEventTargetHelper)
NS_IMPL_ADDREF_INHERITED(nsScreen, nsDOMEventTargetHelper)
NS_IMPL_RELEASE_INHERITED(nsScreen, nsDOMEventTargetHelper)
NS_IMPL_EVENT_HANDLER(nsScreen, mozorientationchange)
NS_IMETHODIMP
nsScreen::GetTop(PRInt32* aTop)
{
nsRect rect;
nsresult rv = GetRect(rect);
*aTop = rect.y;
return rv;
}
NS_IMETHODIMP
nsScreen::GetLeft(PRInt32* aLeft)
{
nsRect rect;
nsresult rv = GetRect(rect);
*aLeft = rect.x;
return rv;
}
NS_IMETHODIMP
nsScreen::GetWidth(PRInt32* aWidth)
{
nsRect rect;
nsresult rv = GetRect(rect);
*aWidth = rect.width;
return rv;
}
NS_IMETHODIMP
nsScreen::GetHeight(PRInt32* aHeight)
{
nsRect rect;
nsresult rv = GetRect(rect);
*aHeight = rect.height;
return rv;
}
NS_IMETHODIMP
nsScreen::GetPixelDepth(PRInt32* aPixelDepth)
{
nsDeviceContext* context = GetDeviceContext();
if (!context) {
*aPixelDepth = -1;
return NS_ERROR_FAILURE;
}
PRUint32 depth;
context->GetDepth(depth);
*aPixelDepth = depth;
return NS_OK;
}
NS_IMETHODIMP
nsScreen::GetColorDepth(PRInt32* aColorDepth)
{
return GetPixelDepth(aColorDepth);
}
NS_IMETHODIMP
nsScreen::GetAvailWidth(PRInt32* aAvailWidth)
{
nsRect rect;
nsresult rv = GetAvailRect(rect);
*aAvailWidth = rect.width;
return rv;
}
NS_IMETHODIMP
nsScreen::GetAvailHeight(PRInt32* aAvailHeight)
{
nsRect rect;
nsresult rv = GetAvailRect(rect);
*aAvailHeight = rect.height;
return rv;
}
NS_IMETHODIMP
nsScreen::GetAvailLeft(PRInt32* aAvailLeft)
{
nsRect rect;
nsresult rv = GetAvailRect(rect);
*aAvailLeft = rect.x;
return rv;
}
NS_IMETHODIMP
nsScreen::GetAvailTop(PRInt32* aAvailTop)
{
nsRect rect;
nsresult rv = GetAvailRect(rect);
*aAvailTop = rect.y;
return rv;
}
nsDeviceContext*
nsScreen::GetDeviceContext()
{
return nsLayoutUtils::GetDeviceContextForScreenInfo(GetOwner());
}
nsresult
nsScreen::GetRect(nsRect& aRect)
{
nsDeviceContext *context = GetDeviceContext();
if (!context) {
return NS_ERROR_FAILURE;
}
context->GetRect(aRect);
aRect.x = nsPresContext::AppUnitsToIntCSSPixels(aRect.x);
aRect.y = nsPresContext::AppUnitsToIntCSSPixels(aRect.y);
aRect.height = nsPresContext::AppUnitsToIntCSSPixels(aRect.height);
aRect.width = nsPresContext::AppUnitsToIntCSSPixels(aRect.width);
return NS_OK;
}
nsresult
nsScreen::GetAvailRect(nsRect& aRect)
{
nsDeviceContext *context = GetDeviceContext();
if (!context) {
return NS_ERROR_FAILURE;
}
context->GetClientRect(aRect);
aRect.x = nsPresContext::AppUnitsToIntCSSPixels(aRect.x);
aRect.y = nsPresContext::AppUnitsToIntCSSPixels(aRect.y);
aRect.height = nsPresContext::AppUnitsToIntCSSPixels(aRect.height);
aRect.width = nsPresContext::AppUnitsToIntCSSPixels(aRect.width);
return NS_OK;
}
void
nsScreen::Notify(const hal::ScreenConfiguration& aConfiguration)
{
ScreenOrientation previousOrientation = mOrientation;
mOrientation = aConfiguration.orientation();
NS_ASSERTION(mOrientation != eScreenOrientation_None &&
mOrientation != eScreenOrientation_EndGuard &&
mOrientation != eScreenOrientation_Portrait &&
mOrientation != eScreenOrientation_Landscape,
"Invalid orientation value passed to notify method!");
if (mOrientation != previousOrientation) {
// TODO: use an helper method, see bug 720768.
nsRefPtr<nsDOMEvent> event = new nsDOMEvent(nsnull, nsnull);
nsresult rv = event->InitEvent(NS_LITERAL_STRING("mozorientationchange"), false, false);
if (NS_FAILED(rv)) {
return;
}
rv = event->SetTrusted(true);
if (NS_FAILED(rv)) {
return;
}
bool dummy;
rv = DispatchEvent(event, &dummy);
if (NS_FAILED(rv)) {
return;
}
}
}
NS_IMETHODIMP
nsScreen::GetMozOrientation(nsAString& aOrientation)
{
switch (mOrientation) {
case eScreenOrientation_None:
case eScreenOrientation_EndGuard:
case eScreenOrientation_Portrait:
case eScreenOrientation_Landscape:
NS_ASSERTION(false, "Shouldn't be used when getting value!");
return NS_ERROR_FAILURE;
case eScreenOrientation_PortraitPrimary:
aOrientation.AssignLiteral("portrait-primary");
break;
case eScreenOrientation_PortraitSecondary:
aOrientation.AssignLiteral("portrait-secondary");
break;
case eScreenOrientation_LandscapePrimary:
aOrientation.AssignLiteral("landscape-primary");
break;
case eScreenOrientation_LandscapeSecondary:
aOrientation.AssignLiteral("landscape-secondary");
break;
}
return NS_OK;
}
NS_IMETHODIMP
nsScreen::MozLockOrientation(const nsAString& aOrientation, bool* aReturn)
{
ScreenOrientation orientation;
*aReturn = false;
if (aOrientation.EqualsLiteral("portrait")) {
orientation = eScreenOrientation_Portrait;
} else if (aOrientation.EqualsLiteral("portrait-primary")) {
orientation = eScreenOrientation_PortraitPrimary;
} else if (aOrientation.EqualsLiteral("portrait-secondary")) {
orientation = eScreenOrientation_PortraitSecondary;
} else if (aOrientation.EqualsLiteral("landscape")) {
orientation = eScreenOrientation_Landscape;
} else if (aOrientation.EqualsLiteral("landscape-primary")) {
orientation = eScreenOrientation_LandscapePrimary;
} else if (aOrientation.EqualsLiteral("landscape-secondary")) {
orientation = eScreenOrientation_LandscapeSecondary;
} else {
return NS_OK;
}
if (!GetOwner()) {
return NS_OK;
}
// Chrome code and apps can always lock the screen orientation.
if (!IsChromeType(GetOwner()->GetDocShell()) &&
!static_cast<nsGlobalWindow*>(GetOwner())->IsPartOfApp()) {
nsCOMPtr<nsIDOMDocument> doc;
GetOwner()->GetDocument(getter_AddRefs(doc));
if (!doc) {
return NS_OK;
}
// Non-apps content can lock orientation only if fullscreen.
bool fullscreen;
doc->GetMozFullScreen(&fullscreen);
if (!fullscreen) {
return NS_OK;
}
nsCOMPtr<nsIDOMEventTarget> target = do_QueryInterface(GetOwner());
if (!target) {
return NS_OK;
}
if (!mEventListener) {
mEventListener = new FullScreenEventListener();
}
target->AddSystemEventListener(NS_LITERAL_STRING("mozfullscreenchange"),
mEventListener, true);
}
*aReturn = hal::LockScreenOrientation(orientation);
return NS_OK;
}
NS_IMETHODIMP
nsScreen::MozUnlockOrientation()
{
hal::UnlockScreenOrientation();
return NS_OK;
}
NS_IMPL_ISUPPORTS1(nsScreen::FullScreenEventListener, nsIDOMEventListener)
NS_IMETHODIMP
nsScreen::FullScreenEventListener::HandleEvent(nsIDOMEvent* aEvent)
{
#ifdef DEBUG
nsAutoString eventType;
aEvent->GetType(eventType);
MOZ_ASSERT(eventType.EqualsLiteral("mozfullscreenchange"));
#endif
nsCOMPtr<nsIDOMEventTarget> target;
aEvent->GetCurrentTarget(getter_AddRefs(target));
// We have to make sure that the event we got is the event sent when
// fullscreen is disabled because we could get one when fullscreen
// got enabled if the lock call is done at the same moment.
nsCOMPtr<nsIDOMWindow> window = do_QueryInterface(target);
MOZ_ASSERT(window);
nsCOMPtr<nsIDOMDocument> doc;
window->GetDocument(getter_AddRefs(doc));
// If we have no doc, we will just continue, remove the event and unlock.
// This is an edge case were orientation lock and fullscreen is meaningless.
if (doc) {
bool fullscreen;
doc->GetMozFullScreen(&fullscreen);
if (fullscreen) {
return NS_OK;
}
}
target->RemoveSystemEventListener(NS_LITERAL_STRING("mozfullscreenchange"),
this, true);
hal::UnlockScreenOrientation();
return NS_OK;
}