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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
#include "nsContentUtils.h"
#include "nsScreen.h"
#include "mozilla/dom/Document.h"
#include "nsGlobalWindowInner.h"
#include "nsGlobalWindowOuter.h"
#include "nsIDocShell.h"
#include "nsPresContext.h"
#include "nsCOMPtr.h"
#include "nsIDocShellTreeItem.h"
#include "nsLayoutUtils.h"
#include "nsDeviceContext.h"
#include "mozilla/widget/ScreenManager.h"
using namespace mozilla;
using namespace mozilla::dom;
nsScreen::nsScreen(nsPIDOMWindowInner* aWindow)
: DOMEventTargetHelper(aWindow),
mScreenOrientation(new ScreenOrientation(aWindow, this)) {}
nsScreen::~nsScreen() = default;
// QueryInterface implementation for nsScreen
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsScreen)
NS_INTERFACE_MAP_END_INHERITING(DOMEventTargetHelper)
NS_IMPL_ADDREF_INHERITED(nsScreen, DOMEventTargetHelper)
NS_IMPL_RELEASE_INHERITED(nsScreen, DOMEventTargetHelper)
NS_IMPL_CYCLE_COLLECTION_INHERITED(nsScreen, DOMEventTargetHelper,
mScreenOrientation)
int32_t nsScreen::PixelDepth() {
// Return 24 to prevent fingerprinting.
if (ShouldResistFingerprinting(RFPTarget::ScreenPixelDepth)) {
return 24;
}
nsDeviceContext* context = GetDeviceContext();
if (NS_WARN_IF(!context)) {
return 24;
}
return context->GetDepth();
}
nsPIDOMWindowOuter* nsScreen::GetOuter() const {
if (nsPIDOMWindowInner* inner = GetOwner()) {
return inner->GetOuterWindow();
}
return nullptr;
}
nsDeviceContext* nsScreen::GetDeviceContext() const {
return nsLayoutUtils::GetDeviceContextForScreenInfo(GetOuter());
}
CSSIntRect nsScreen::GetRect() {
// Return window inner rect to prevent fingerprinting.
if (ShouldResistFingerprinting(RFPTarget::ScreenRect)) {
return GetWindowInnerRect();
}
// Here we manipulate the value of aRect to represent the screen size,
// if in RDM.
if (nsPIDOMWindowInner* owner = GetOwner()) {
if (Document* doc = owner->GetExtantDoc()) {
Maybe<CSSIntSize> deviceSize =
nsGlobalWindowOuter::GetRDMDeviceSize(*doc);
if (deviceSize.isSome()) {
const CSSIntSize& size = deviceSize.value();
return {0, 0, size.width, size.height};
}
}
}
nsDeviceContext* context = GetDeviceContext();
if (NS_WARN_IF(!context)) {
return {};
}
nsRect r;
context->GetRect(r);
return CSSIntRect::FromAppUnitsRounded(r);
}
CSSIntRect nsScreen::GetAvailRect() {
// Return window inner rect to prevent fingerprinting.
if (ShouldResistFingerprinting(RFPTarget::ScreenAvailRect)) {
return GetWindowInnerRect();
}
// Here we manipulate the value of aRect to represent the screen size,
// if in RDM.
if (nsPIDOMWindowInner* owner = GetOwner()) {
if (Document* doc = owner->GetExtantDoc()) {
Maybe<CSSIntSize> deviceSize =
nsGlobalWindowOuter::GetRDMDeviceSize(*doc);
if (deviceSize.isSome()) {
const CSSIntSize& size = deviceSize.value();
return {0, 0, size.width, size.height};
}
}
}
nsDeviceContext* context = GetDeviceContext();
if (NS_WARN_IF(!context)) {
return {};
}
nsRect r;
context->GetClientRect(r);
return CSSIntRect::FromAppUnitsRounded(r);
}
uint16_t nsScreen::GetOrientationAngle() const {
nsDeviceContext* context = GetDeviceContext();
if (context) {
return context->GetScreenOrientationAngle();
}
RefPtr<widget::Screen> s =
widget::ScreenManager::GetSingleton().GetPrimaryScreen();
return s->GetOrientationAngle();
}
hal::ScreenOrientation nsScreen::GetOrientationType() const {
nsDeviceContext* context = GetDeviceContext();
if (context) {
return context->GetScreenOrientationType();
}
RefPtr<widget::Screen> s =
widget::ScreenManager::GetSingleton().GetPrimaryScreen();
return s->GetOrientationType();
}
ScreenOrientation* nsScreen::Orientation() const { return mScreenOrientation; }
void nsScreen::GetMozOrientation(nsString& aOrientation,
CallerType aCallerType) const {
switch (mScreenOrientation->DeviceType(aCallerType)) {
case OrientationType::Portrait_primary:
aOrientation.AssignLiteral("portrait-primary");
break;
case OrientationType::Portrait_secondary:
aOrientation.AssignLiteral("portrait-secondary");
break;
case OrientationType::Landscape_primary:
aOrientation.AssignLiteral("landscape-primary");
break;
case OrientationType::Landscape_secondary:
aOrientation.AssignLiteral("landscape-secondary");
break;
default:
MOZ_CRASH("Unacceptable screen orientation type.");
}
}
/* virtual */
JSObject* nsScreen::WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) {
return Screen_Binding::Wrap(aCx, this, aGivenProto);
}
CSSIntRect nsScreen::GetWindowInnerRect() {
nsCOMPtr<nsPIDOMWindowInner> win = GetOwner();
if (!win) {
return {};
}
double width;
double height;
if (NS_FAILED(win->GetInnerWidth(&width)) ||
NS_FAILED(win->GetInnerHeight(&height))) {
return {};
}
return {0, 0, int32_t(std::round(width)), int32_t(std::round(height))};
}
bool nsScreen::ShouldResistFingerprinting(RFPTarget aTarget) const {
nsCOMPtr<nsPIDOMWindowInner> owner = GetOwner();
return owner &&
nsGlobalWindowInner::Cast(owner)->ShouldResistFingerprinting(aTarget);
}