1 files changed, 122 insertions, 0 deletions
diff --git a/dom/base/ScreenOrientation.h b/dom/base/ScreenOrientation.h
new file mode 100644
index 0000000000..f836f688a2
--- /dev/null
+++ b/dom/base/ScreenOrientation.h
@@ -0,0 +1,122 @@
+/* -*- 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/. */
+
+#ifndef mozilla_dom_ScreenOrientation_h
+#define mozilla_dom_ScreenOrientation_h
+
+#include "mozilla/DOMEventTargetHelper.h"
+#include "mozilla/dom/ScreenOrientationBinding.h"
+#include "mozilla/HalScreenConfiguration.h"
+
+class nsScreen;
+
+namespace mozilla {
+namespace dom {
+
+class Promise;
+// Make sure that any change to ScreenOrientationInternal values are
+// also made in mobile/android/base/GeckoScreenOrientation.java
+typedef uint32_t ScreenOrientationInternal;
+
+static const ScreenOrientationInternal eScreenOrientation_None               = 0;
+static const ScreenOrientationInternal eScreenOrientation_PortraitPrimary    = 1u << 0;
+static const ScreenOrientationInternal eScreenOrientation_PortraitSecondary  = 1u << 1;
+static const ScreenOrientationInternal eScreenOrientation_LandscapePrimary   = 1u << 2;
+static const ScreenOrientationInternal eScreenOrientation_LandscapeSecondary = 1u << 3;
+//eScreenOrientation_Default will use the natural orientation for the deivce,
+//it could be PortraitPrimary or LandscapePrimary depends on display resolution
+static const ScreenOrientationInternal eScreenOrientation_Default            = 1u << 4;
+
+class ScreenOrientation final : public DOMEventTargetHelper,
+                                public mozilla::hal::ScreenConfigurationObserver
+{
+  // nsScreen has deprecated API that shares implementation.
+  friend class ::nsScreen;
+
+public:
+  NS_DECL_ISUPPORTS_INHERITED
+  NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(ScreenOrientation, mozilla::DOMEventTargetHelper)
+  NS_REALLY_FORWARD_NSIDOMEVENTTARGET(mozilla::DOMEventTargetHelper)
+
+  IMPL_EVENT_HANDLER(change)
+
+  ScreenOrientation(nsPIDOMWindowInner* aWindow, nsScreen* aScreen);
+
+  already_AddRefed<Promise> Lock(OrientationLockType aOrientation,
+                                 ErrorResult& aRv);
+
+  void Unlock(ErrorResult& aRv);
+
+  // DeviceType and DeviceAngle gets the current type and angle of the device.
+  OrientationType DeviceType() const;
+  uint16_t DeviceAngle() const;
+
+  // GetType and GetAngle gets the type and angle of the responsible document
+  // (as defined in specification).
+  OrientationType GetType(ErrorResult& aRv) const;
+  uint16_t GetAngle(ErrorResult& aRv) const;
+
+  virtual JSObject* WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) override;
+
+  void Notify(const mozilla::hal::ScreenConfiguration& aConfiguration) override;
+
+  static void UpdateActiveOrientationLock(ScreenOrientationInternal aOrientation);
+
+private:
+  virtual ~ScreenOrientation();
+
+  // Listener to unlock orientation if we leave fullscreen.
+  class FullScreenEventListener;
+
+  // Listener to update document's orienation lock when document becomes
+  // visible.
+  class VisibleEventListener;
+
+  // Task to run step to lock orientation as defined in specification.
+  class LockOrientationTask;
+
+  enum LockPermission {
+    LOCK_DENIED,
+    FULLSCREEN_LOCK_ALLOWED,
+    LOCK_ALLOWED
+  };
+
+  // This method calls into the HAL to lock the device and sets
+  // up listeners for full screen change.
+  bool LockDeviceOrientation(ScreenOrientationInternal aOrientation,
+                             bool aIsFullscreen, ErrorResult& aRv);
+
+  // This method calls in to the HAL to unlock the device and removes
+  // full screen change listener.
+  void UnlockDeviceOrientation();
+
+  // This method performs the same function as |Lock| except it takes
+  // a ScreenOrientationInternal argument instead of an OrientationType.
+  // This method exists in order to share implementation with nsScreen that
+  // uses ScreenOrientationInternal.
+  already_AddRefed<Promise> LockInternal(ScreenOrientationInternal aOrientation,
+                                         ErrorResult& aRv);
+
+  void DispatchChangeEvent();
+
+  bool ShouldResistFingerprinting() const;
+
+  LockPermission GetLockOrientationPermission(bool aCheckSandbox) const;
+
+  // Gets the responsible document as defined in the spec.
+  nsIDocument* GetResponsibleDocument() const;
+
+  RefPtr<nsScreen> mScreen;
+  RefPtr<FullScreenEventListener> mFullScreenListener;
+  RefPtr<VisibleEventListener> mVisibleListener;
+  OrientationType mType;
+  uint16_t mAngle;
+};
+
+} // namespace dom
+} // namespace mozilla
+
+#endif // mozilla_dom_ScreenOrientation_h