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      1 // Copyright 2013 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef UI_BASE_ANDROID_WINDOW_ANDROID_H_
      6 #define UI_BASE_ANDROID_WINDOW_ANDROID_H_
      7 
      8 #include <jni.h>
      9 #include <vector>
     10 #include "base/android/jni_weak_ref.h"
     11 #include "base/android/scoped_java_ref.h"
     12 #include "base/observer_list.h"
     13 #include "base/time/time.h"
     14 #include "ui/base/ui_base_export.h"
     15 #include "ui/gfx/vector2d_f.h"
     16 
     17 namespace ui {
     18 
     19 class WindowAndroidCompositor;
     20 class WindowAndroidObserver;
     21 
     22 // Android implementation of the activity window.
     23 class UI_BASE_EXPORT WindowAndroid {
     24  public:
     25   WindowAndroid(JNIEnv* env, jobject obj, jlong vsync_period);
     26 
     27   void Destroy(JNIEnv* env, jobject obj);
     28 
     29   base::android::ScopedJavaLocalRef<jobject> GetJavaObject();
     30 
     31   static bool RegisterWindowAndroid(JNIEnv* env);
     32 
     33   // The content offset is used to translate snapshots to the correct part of
     34   // the window.
     35   void set_content_offset(const gfx::Vector2dF& content_offset) {
     36     content_offset_ = content_offset;
     37   }
     38 
     39   gfx::Vector2dF content_offset() const {
     40     return content_offset_;
     41   }
     42 
     43   // Compositor callback relay.
     44   void OnCompositingDidCommit();
     45 
     46   void AttachCompositor(WindowAndroidCompositor* compositor);
     47   void DetachCompositor();
     48 
     49   void AddObserver(WindowAndroidObserver* observer);
     50   void RemoveObserver(WindowAndroidObserver* observer);
     51 
     52   WindowAndroidCompositor* GetCompositor() { return compositor_; }
     53 
     54   void RequestVSyncUpdate();
     55   void SetNeedsAnimate();
     56   void OnVSync(JNIEnv* env, jobject obj, jlong time_micros);
     57   void Animate(base::TimeTicks begin_frame_time);
     58 
     59  private:
     60   ~WindowAndroid();
     61 
     62   JavaObjectWeakGlobalRef weak_java_window_;
     63   gfx::Vector2dF content_offset_;
     64   WindowAndroidCompositor* compositor_;
     65   base::TimeDelta vsync_period_;
     66 
     67   ObserverList<WindowAndroidObserver> observer_list_;
     68 
     69   DISALLOW_COPY_AND_ASSIGN(WindowAndroid);
     70 };
     71 
     72 }  // namespace ui
     73 
     74 #endif  // UI_BASE_ANDROID_WINDOW_ANDROID_H_
     75