Add m-esr52 at 52.6.0

1 files changed, 360 insertions, 0 deletions

diff --git a/dom/base/nsScreen.cpp b/dom/base/nsScreen.cpp
new file mode 100644
index 000000000..8b129531f
--- /dev/null
+++ b/dom/base/nsScreen.cpp
@@ -0,0 +1,360 @@
+/* -*- 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/dom/Event.h" // for nsIDOMEvent::InternalDOMEvent()
+#include "mozilla/dom/ScreenBinding.h"
+#include "nsContentUtils.h"
+#include "nsScreen.h"
+#include "nsIDocument.h"
+#include "nsIDocShell.h"
+#include "nsIDocument.h"
+#include "nsPresContext.h"
+#include "nsCOMPtr.h"
+#include "nsIDocShellTreeItem.h"
+#include "nsLayoutUtils.h"
+#include "nsJSUtils.h"
+#include "nsDeviceContext.h"
+
+using namespace mozilla;
+using namespace mozilla::dom;
+
+/* static */ already_AddRefed<nsScreen>
+nsScreen::Create(nsPIDOMWindowInner* aWindow)
+{
+  MOZ_ASSERT(aWindow);
+  MOZ_ASSERT(aWindow->IsInnerWindow());
+
+  if (!aWindow->GetDocShell()) {
+    return nullptr;
+  }
+
+  nsCOMPtr<nsIScriptGlobalObject> sgo = do_QueryInterface(aWindow);
+  NS_ENSURE_TRUE(sgo, nullptr);
+
+  RefPtr<nsScreen> screen = new nsScreen(aWindow);
+  return screen.forget();
+}
+
+nsScreen::nsScreen(nsPIDOMWindowInner* aWindow)
+  : DOMEventTargetHelper(aWindow)
+  , mScreenOrientation(new ScreenOrientation(aWindow, this))
+{
+}
+
+nsScreen::~nsScreen()
+{
+}
+
+
+// QueryInterface implementation for nsScreen
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(nsScreen)
+  NS_INTERFACE_MAP_ENTRY(nsIDOMScreen)
+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::GetPixelDepth(ErrorResult& aRv)
+{
+  // Return 24 to prevent fingerprinting.
+  if (ShouldResistFingerprinting()) {
+    return 24;
+  }
+
+  nsDeviceContext* context = GetDeviceContext();
+
+  if (!context) {
+    aRv.Throw(NS_ERROR_FAILURE);
+    return -1;
+  }
+
+  uint32_t depth;
+  context->GetDepth(depth);
+  return depth;
+}
+
+#define FORWARD_LONG_GETTER(_name)                                              \
+  NS_IMETHODIMP                                                                 \
+  nsScreen::Get ## _name(int32_t* aOut)                                         \
+  {                                                                             \
+    ErrorResult rv;                                                             \
+    *aOut = Get ## _name(rv);                                                   \
+    return rv.StealNSResult();                                                  \
+  }
+
+FORWARD_LONG_GETTER(AvailWidth)
+FORWARD_LONG_GETTER(AvailHeight)
+FORWARD_LONG_GETTER(Width)
+FORWARD_LONG_GETTER(Height)
+
+FORWARD_LONG_GETTER(Top)
+FORWARD_LONG_GETTER(Left)
+FORWARD_LONG_GETTER(AvailTop)
+FORWARD_LONG_GETTER(AvailLeft)
+
+FORWARD_LONG_GETTER(PixelDepth)
+FORWARD_LONG_GETTER(ColorDepth)
+
+nsPIDOMWindowOuter*
+nsScreen::GetOuter() const
+{
+  if (nsPIDOMWindowInner* inner = GetOwner()) {
+    return inner->GetOuterWindow();
+  }
+
+  return nullptr;
+}
+
+nsDeviceContext*
+nsScreen::GetDeviceContext()
+{
+  return nsLayoutUtils::GetDeviceContextForScreenInfo(GetOuter());
+}
+
+nsresult
+nsScreen::GetRect(nsRect& aRect)
+{
+  // Return window inner rect to prevent fingerprinting.
+  if (ShouldResistFingerprinting()) {
+    return GetWindowInnerRect(aRect);
+  }
+
+  nsDeviceContext *context = GetDeviceContext();
+
+  if (!context) {
+    return NS_ERROR_FAILURE;
+  }
+
+  context->GetRect(aRect);
+  LayoutDevicePoint screenTopLeftDev =
+    LayoutDevicePixel::FromAppUnits(aRect.TopLeft(),
+                                    context->AppUnitsPerDevPixel());
+  DesktopPoint screenTopLeftDesk =
+    screenTopLeftDev / context->GetDesktopToDeviceScale();
+
+  aRect.x = NSToIntRound(screenTopLeftDesk.x);
+  aRect.y = NSToIntRound(screenTopLeftDesk.y);
+
+  aRect.height = nsPresContext::AppUnitsToIntCSSPixels(aRect.height);
+  aRect.width = nsPresContext::AppUnitsToIntCSSPixels(aRect.width);
+
+  return NS_OK;
+}
+
+nsresult
+nsScreen::GetAvailRect(nsRect& aRect)
+{
+  // Return window inner rect to prevent fingerprinting.
+  if (ShouldResistFingerprinting()) {
+    return GetWindowInnerRect(aRect);
+  }
+
+  nsDeviceContext *context = GetDeviceContext();
+
+  if (!context) {
+    return NS_ERROR_FAILURE;
+  }
+
+  nsRect r;
+  context->GetRect(r);
+  LayoutDevicePoint screenTopLeftDev =
+    LayoutDevicePixel::FromAppUnits(r.TopLeft(),
+                                    context->AppUnitsPerDevPixel());
+  DesktopPoint screenTopLeftDesk =
+    screenTopLeftDev / context->GetDesktopToDeviceScale();
+
+  context->GetClientRect(aRect);
+
+  aRect.x = NSToIntRound(screenTopLeftDesk.x) +
+            nsPresContext::AppUnitsToIntCSSPixels(aRect.x - r.x);
+  aRect.y = NSToIntRound(screenTopLeftDesk.y) +
+            nsPresContext::AppUnitsToIntCSSPixels(aRect.y - r.y);
+
+  aRect.height = nsPresContext::AppUnitsToIntCSSPixels(aRect.height);
+  aRect.width = nsPresContext::AppUnitsToIntCSSPixels(aRect.width);
+
+  return NS_OK;
+}
+
+mozilla::dom::ScreenOrientation*
+nsScreen::Orientation() const
+{
+  return mScreenOrientation;
+}
+
+void
+nsScreen::GetMozOrientation(nsString& aOrientation) const
+{
+  switch (mScreenOrientation->DeviceType()) {
+  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.");
+  }
+}
+
+NS_IMETHODIMP
+nsScreen::GetSlowMozOrientation(nsAString& aOrientation)
+{
+  nsString orientation;
+  GetMozOrientation(orientation);
+  aOrientation = orientation;
+  return NS_OK;
+}
+
+static void
+UpdateDocShellOrientationLock(nsPIDOMWindowInner* aWindow,
+                              ScreenOrientationInternal aOrientation)
+{
+  if (!aWindow) {
+    return;
+  }
+
+  nsCOMPtr<nsIDocShell> docShell = aWindow->GetDocShell();
+  if (!docShell) {
+    return;
+  }
+
+  nsCOMPtr<nsIDocShellTreeItem> root;
+  docShell->GetSameTypeRootTreeItem(getter_AddRefs(root));
+  nsCOMPtr<nsIDocShell> rootShell(do_QueryInterface(root));
+  if (!rootShell) {
+    return;
+  }
+
+  rootShell->SetOrientationLock(aOrientation);
+}
+
+bool
+nsScreen::MozLockOrientation(const nsAString& aOrientation, ErrorResult& aRv)
+{
+  nsString orientation(aOrientation);
+  Sequence<nsString> orientations;
+  if (!orientations.AppendElement(orientation, fallible)) {
+    aRv.Throw(NS_ERROR_OUT_OF_MEMORY);
+    return false;
+  }
+  return MozLockOrientation(orientations, aRv);
+}
+
+bool
+nsScreen::MozLockOrientation(const Sequence<nsString>& aOrientations,
+                             ErrorResult& aRv)
+{
+  if (ShouldResistFingerprinting()) {
+    return false;
+  }
+  ScreenOrientationInternal orientation = eScreenOrientation_None;
+
+  for (uint32_t i = 0; i < aOrientations.Length(); ++i) {
+    const nsString& item = aOrientations[i];
+
+    if (item.EqualsLiteral("portrait")) {
+      orientation |= eScreenOrientation_PortraitPrimary |
+                     eScreenOrientation_PortraitSecondary;
+    } else if (item.EqualsLiteral("portrait-primary")) {
+      orientation |= eScreenOrientation_PortraitPrimary;
+    } else if (item.EqualsLiteral("portrait-secondary")) {
+      orientation |= eScreenOrientation_PortraitSecondary;
+    } else if (item.EqualsLiteral("landscape")) {
+      orientation |= eScreenOrientation_LandscapePrimary |
+                     eScreenOrientation_LandscapeSecondary;
+    } else if (item.EqualsLiteral("landscape-primary")) {
+      orientation |= eScreenOrientation_LandscapePrimary;
+    } else if (item.EqualsLiteral("landscape-secondary")) {
+      orientation |= eScreenOrientation_LandscapeSecondary;
+    } else if (item.EqualsLiteral("default")) {
+      orientation |= eScreenOrientation_Default;
+    } else {
+      // If we don't recognize the token, we should just return 'false'
+      // without throwing.
+      return false;
+    }
+  }
+
+  switch (mScreenOrientation->GetLockOrientationPermission(false)) {
+    case ScreenOrientation::LOCK_DENIED:
+      return false;
+    case ScreenOrientation::LOCK_ALLOWED:
+      UpdateDocShellOrientationLock(GetOwner(), orientation);
+      return mScreenOrientation->LockDeviceOrientation(orientation, false, aRv);
+    case ScreenOrientation::FULLSCREEN_LOCK_ALLOWED:
+      UpdateDocShellOrientationLock(GetOwner(), orientation);
+      return mScreenOrientation->LockDeviceOrientation(orientation, true, aRv);
+  }
+
+  // This is only for compilers that don't understand that the previous switch
+  // will always return.
+  MOZ_CRASH("unexpected lock orientation permission value");
+}
+
+void
+nsScreen::MozUnlockOrientation()
+{
+  if (ShouldResistFingerprinting()) {
+    return;
+  }
+  UpdateDocShellOrientationLock(GetOwner(), eScreenOrientation_None);
+  mScreenOrientation->UnlockDeviceOrientation();
+}
+
+bool
+nsScreen::IsDeviceSizePageSize()
+{
+  if (nsPIDOMWindowInner* owner = GetOwner()) {
+    nsIDocShell* docShell = owner->GetDocShell();
+    if (docShell) {
+      return docShell->GetDeviceSizeIsPageSize();
+    }
+  }
+  return false;
+}
+
+/* virtual */
+JSObject*
+nsScreen::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
+{
+  return ScreenBinding::Wrap(aCx, this, aGivenProto);
+}
+
+nsresult
+nsScreen::GetWindowInnerRect(nsRect& aRect)
+{
+  aRect.x = 0;
+  aRect.y = 0;
+  nsCOMPtr<nsPIDOMWindowInner> win = GetOwner();
+  if (!win) {
+    return NS_ERROR_FAILURE;
+  }
+  nsresult rv = win->GetInnerWidth(&aRect.width);
+  NS_ENSURE_SUCCESS(rv, rv);
+  return win->GetInnerHeight(&aRect.height);
+}
+
+bool nsScreen::ShouldResistFingerprinting() const
+{
+  bool resist = false;
+  nsCOMPtr<nsPIDOMWindowInner> owner = GetOwner();
+  if (owner) {
+    resist = nsContentUtils::ShouldResistFingerprinting(owner->GetDocShell());
+  }
+  return resist;
+}