mirror of
https://github.com/mozilla/gecko-dev.git
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362 lines
10 KiB
C++
362 lines
10 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozilla/Hal.h"
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#include "mozilla/dom/Event.h" // for nsIDOMEvent::InternalDOMEvent()
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#include "mozilla/dom/ScreenBinding.h"
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#include "nsScreen.h"
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#include "nsIDocument.h"
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#include "nsIDocShell.h"
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#include "nsIDocument.h"
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#include "nsPresContext.h"
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#include "nsCOMPtr.h"
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#include "nsIDocShellTreeItem.h"
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#include "nsLayoutUtils.h"
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#include "nsJSUtils.h"
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#include "nsDeviceContext.h"
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using namespace mozilla;
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using namespace mozilla::dom;
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/* static */ already_AddRefed<nsScreen>
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nsScreen::Create(nsPIDOMWindow* aWindow)
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{
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MOZ_ASSERT(aWindow);
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if (!aWindow->GetDocShell()) {
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return nullptr;
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}
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nsCOMPtr<nsIScriptGlobalObject> sgo =
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do_QueryInterface(static_cast<nsPIDOMWindow*>(aWindow));
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NS_ENSURE_TRUE(sgo, nullptr);
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nsRefPtr<nsScreen> screen = new nsScreen(aWindow);
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hal::RegisterScreenConfigurationObserver(screen);
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hal::ScreenConfiguration config;
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hal::GetCurrentScreenConfiguration(&config);
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screen->mOrientation = config.orientation();
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return screen.forget();
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}
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nsScreen::nsScreen(nsPIDOMWindow* aWindow)
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: DOMEventTargetHelper(aWindow)
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, mEventListener(nullptr)
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{
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}
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nsScreen::~nsScreen()
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{
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MOZ_ASSERT(!mEventListener);
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hal::UnregisterScreenConfigurationObserver(this);
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}
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// QueryInterface implementation for nsScreen
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NS_INTERFACE_MAP_BEGIN(nsScreen)
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NS_INTERFACE_MAP_ENTRY(nsIDOMScreen)
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NS_INTERFACE_MAP_END_INHERITING(DOMEventTargetHelper)
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NS_IMPL_ADDREF_INHERITED(nsScreen, DOMEventTargetHelper)
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NS_IMPL_RELEASE_INHERITED(nsScreen, DOMEventTargetHelper)
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int32_t
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nsScreen::GetPixelDepth(ErrorResult& aRv)
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{
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nsDeviceContext* context = GetDeviceContext();
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if (!context) {
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aRv.Throw(NS_ERROR_FAILURE);
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return -1;
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}
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uint32_t depth;
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context->GetDepth(depth);
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return depth;
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}
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#define FORWARD_LONG_GETTER(_name) \
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NS_IMETHODIMP \
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nsScreen::Get ## _name(int32_t* aOut) \
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{ \
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ErrorResult rv; \
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*aOut = Get ## _name(rv); \
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return rv.ErrorCode(); \
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}
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FORWARD_LONG_GETTER(AvailWidth)
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FORWARD_LONG_GETTER(AvailHeight)
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FORWARD_LONG_GETTER(Width)
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FORWARD_LONG_GETTER(Height)
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FORWARD_LONG_GETTER(Top)
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FORWARD_LONG_GETTER(Left)
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FORWARD_LONG_GETTER(AvailTop)
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FORWARD_LONG_GETTER(AvailLeft)
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FORWARD_LONG_GETTER(PixelDepth)
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FORWARD_LONG_GETTER(ColorDepth)
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nsDeviceContext*
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nsScreen::GetDeviceContext()
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{
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return nsLayoutUtils::GetDeviceContextForScreenInfo(GetOwner());
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}
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nsresult
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nsScreen::GetRect(nsRect& aRect)
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{
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nsDeviceContext *context = GetDeviceContext();
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if (!context) {
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return NS_ERROR_FAILURE;
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}
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context->GetRect(aRect);
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aRect.x = nsPresContext::AppUnitsToIntCSSPixels(aRect.x);
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aRect.y = nsPresContext::AppUnitsToIntCSSPixels(aRect.y);
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aRect.height = nsPresContext::AppUnitsToIntCSSPixels(aRect.height);
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aRect.width = nsPresContext::AppUnitsToIntCSSPixels(aRect.width);
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return NS_OK;
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}
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nsresult
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nsScreen::GetAvailRect(nsRect& aRect)
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{
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nsDeviceContext *context = GetDeviceContext();
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if (!context) {
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return NS_ERROR_FAILURE;
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}
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context->GetClientRect(aRect);
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aRect.x = nsPresContext::AppUnitsToIntCSSPixels(aRect.x);
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aRect.y = nsPresContext::AppUnitsToIntCSSPixels(aRect.y);
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aRect.height = nsPresContext::AppUnitsToIntCSSPixels(aRect.height);
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aRect.width = nsPresContext::AppUnitsToIntCSSPixels(aRect.width);
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return NS_OK;
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}
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void
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nsScreen::Notify(const hal::ScreenConfiguration& aConfiguration)
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{
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ScreenOrientation previousOrientation = mOrientation;
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mOrientation = aConfiguration.orientation();
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NS_ASSERTION(mOrientation == eScreenOrientation_PortraitPrimary ||
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mOrientation == eScreenOrientation_PortraitSecondary ||
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mOrientation == eScreenOrientation_LandscapePrimary ||
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mOrientation == eScreenOrientation_LandscapeSecondary,
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"Invalid orientation value passed to notify method!");
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if (mOrientation != previousOrientation) {
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DispatchTrustedEvent(NS_LITERAL_STRING("mozorientationchange"));
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}
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}
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void
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nsScreen::GetMozOrientation(nsString& aOrientation)
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{
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switch (mOrientation) {
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case eScreenOrientation_PortraitPrimary:
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aOrientation.AssignLiteral("portrait-primary");
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break;
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case eScreenOrientation_PortraitSecondary:
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aOrientation.AssignLiteral("portrait-secondary");
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break;
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case eScreenOrientation_LandscapePrimary:
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aOrientation.AssignLiteral("landscape-primary");
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break;
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case eScreenOrientation_LandscapeSecondary:
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aOrientation.AssignLiteral("landscape-secondary");
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break;
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case eScreenOrientation_None:
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default:
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MOZ_CRASH("Unacceptable mOrientation value");
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}
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}
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NS_IMETHODIMP
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nsScreen::GetSlowMozOrientation(nsAString& aOrientation)
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{
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nsString orientation;
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GetMozOrientation(orientation);
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aOrientation = orientation;
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return NS_OK;
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}
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nsScreen::LockPermission
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nsScreen::GetLockOrientationPermission() const
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{
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nsCOMPtr<nsPIDOMWindow> owner = GetOwner();
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if (!owner) {
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return LOCK_DENIED;
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}
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// Chrome can always lock the screen orientation.
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nsIDocShell* docShell = owner->GetDocShell();
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if (docShell && docShell->ItemType() == nsIDocShellTreeItem::typeChrome) {
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return LOCK_ALLOWED;
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}
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nsCOMPtr<nsIDocument> doc = owner->GetDoc();
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if (!doc || doc->Hidden()) {
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return LOCK_DENIED;
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}
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// Apps can always lock the screen orientation.
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if (doc->NodePrincipal()->GetAppStatus() >=
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nsIPrincipal::APP_STATUS_INSTALLED) {
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return LOCK_ALLOWED;
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}
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// Other content must be full-screen in order to lock orientation.
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return doc->MozFullScreen() ? FULLSCREEN_LOCK_ALLOWED : LOCK_DENIED;
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}
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bool
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nsScreen::MozLockOrientation(const nsAString& aOrientation, ErrorResult& aRv)
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{
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nsString orientation(aOrientation);
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Sequence<nsString> orientations;
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if (!orientations.AppendElement(orientation)) {
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aRv.Throw(NS_ERROR_OUT_OF_MEMORY);
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return false;
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}
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return MozLockOrientation(orientations, aRv);
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}
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bool
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nsScreen::MozLockOrientation(const Sequence<nsString>& aOrientations,
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ErrorResult& aRv)
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{
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ScreenOrientation orientation = eScreenOrientation_None;
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for (uint32_t i = 0; i < aOrientations.Length(); ++i) {
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const nsString& item = aOrientations[i];
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if (item.EqualsLiteral("portrait")) {
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orientation |= eScreenOrientation_PortraitPrimary |
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eScreenOrientation_PortraitSecondary;
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} else if (item.EqualsLiteral("portrait-primary")) {
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orientation |= eScreenOrientation_PortraitPrimary;
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} else if (item.EqualsLiteral("portrait-secondary")) {
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orientation |= eScreenOrientation_PortraitSecondary;
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} else if (item.EqualsLiteral("landscape")) {
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orientation |= eScreenOrientation_LandscapePrimary |
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eScreenOrientation_LandscapeSecondary;
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} else if (item.EqualsLiteral("landscape-primary")) {
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orientation |= eScreenOrientation_LandscapePrimary;
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} else if (item.EqualsLiteral("landscape-secondary")) {
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orientation |= eScreenOrientation_LandscapeSecondary;
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} else if (item.EqualsLiteral("default")) {
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orientation |= eScreenOrientation_Default;
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} else {
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// If we don't recognize the token, we should just return 'false'
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// without throwing.
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return false;
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}
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}
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switch (GetLockOrientationPermission()) {
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case LOCK_DENIED:
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return false;
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case LOCK_ALLOWED:
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return hal::LockScreenOrientation(orientation);
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case FULLSCREEN_LOCK_ALLOWED: {
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// We need to register a listener so we learn when we leave full-screen
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// and when we will have to unlock the screen.
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// This needs to be done before LockScreenOrientation call to make sure
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// the locking can be unlocked.
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nsCOMPtr<EventTarget> target = do_QueryInterface(GetOwner()->GetDoc());
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if (!target) {
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return false;
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}
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if (!hal::LockScreenOrientation(orientation)) {
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return false;
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}
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// We are fullscreen and lock has been accepted.
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if (!mEventListener) {
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mEventListener = new FullScreenEventListener();
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}
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aRv = target->AddSystemEventListener(NS_LITERAL_STRING("mozfullscreenchange"),
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mEventListener, /* useCapture = */ true);
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return true;
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}
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}
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// This is only for compilers that don't understand that the previous switch
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// will always return.
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MOZ_CRASH("unexpected lock orientation permission value");
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}
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void
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nsScreen::MozUnlockOrientation()
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{
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hal::UnlockScreenOrientation();
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}
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bool
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nsScreen::IsDeviceSizePageSize()
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{
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nsPIDOMWindow* owner = GetOwner();
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if (owner) {
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nsIDocShell* docShell = owner->GetDocShell();
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if (docShell) {
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return docShell->GetDeviceSizeIsPageSize();
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}
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}
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return false;
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}
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/* virtual */
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JSObject*
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nsScreen::WrapObject(JSContext* aCx)
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{
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return ScreenBinding::Wrap(aCx, this);
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}
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NS_IMPL_ISUPPORTS(nsScreen::FullScreenEventListener, nsIDOMEventListener)
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NS_IMETHODIMP
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nsScreen::FullScreenEventListener::HandleEvent(nsIDOMEvent* aEvent)
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{
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#ifdef DEBUG
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nsAutoString eventType;
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aEvent->GetType(eventType);
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MOZ_ASSERT(eventType.EqualsLiteral("mozfullscreenchange"));
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#endif
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nsCOMPtr<EventTarget> target = aEvent->InternalDOMEvent()->GetCurrentTarget();
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MOZ_ASSERT(target);
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nsCOMPtr<nsIDocument> doc = do_QueryInterface(target);
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MOZ_ASSERT(doc);
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// We have to make sure that the event we got is the event sent when
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// fullscreen is disabled because we could get one when fullscreen
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// got enabled if the lock call is done at the same moment.
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if (doc->MozFullScreen()) {
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return NS_OK;
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}
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target->RemoveSystemEventListener(NS_LITERAL_STRING("mozfullscreenchange"),
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this, true);
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hal::UnlockScreenOrientation();
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return NS_OK;
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}
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