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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 #include "ui/base/android/window_android.h"
      6 
      7 #include "base/android/jni_android.h"
      8 #include "base/android/jni_array.h"
      9 #include "base/android/jni_helper.h"
     10 #include "base/android/scoped_java_ref.h"
     11 #include "jni/WindowAndroid_jni.h"
     12 #include "ui/base/android/window_android_observer.h"
     13 
     14 namespace ui {
     15 
     16 using base::android::AttachCurrentThread;
     17 using base::android::ScopedJavaLocalRef;
     18 
     19 WindowAndroid::WindowAndroid(JNIEnv* env, jobject obj)
     20   : weak_java_window_(env, obj) {
     21 }
     22 
     23 void WindowAndroid::Destroy(JNIEnv* env, jobject obj) {
     24   delete this;
     25 }
     26 
     27 ScopedJavaLocalRef<jobject> WindowAndroid::GetJavaObject() {
     28   return weak_java_window_.get(AttachCurrentThread());
     29 }
     30 
     31 bool WindowAndroid::RegisterWindowAndroid(JNIEnv* env) {
     32   return RegisterNativesImpl(env);
     33 }
     34 
     35 WindowAndroid::~WindowAndroid() {
     36 }
     37 
     38 bool WindowAndroid::GrabSnapshot(
     39     int content_x, int content_y, int width, int height,
     40     std::vector<unsigned char>* png_representation) {
     41   JNIEnv* env = AttachCurrentThread();
     42   ScopedJavaLocalRef<jbyteArray> result =
     43       Java_WindowAndroid_grabSnapshot(env, GetJavaObject().obj(),
     44                                       content_x + content_offset_.x(),
     45                                       content_y + content_offset_.y(),
     46                                       width, height);
     47   if (result.is_null())
     48     return false;
     49   base::android::JavaByteArrayToByteVector(
     50       env, result.obj(), png_representation);
     51   return true;
     52 }
     53 
     54 void WindowAndroid::OnCompositingDidCommit() {
     55   FOR_EACH_OBSERVER(WindowAndroidObserver,
     56                     observer_list_,
     57                     OnCompositingDidCommit());
     58 }
     59 
     60 void WindowAndroid::AddObserver(WindowAndroidObserver* observer) {
     61   if (!observer_list_.HasObserver(observer))
     62     observer_list_.AddObserver(observer);
     63 }
     64 
     65 void WindowAndroid::RemoveObserver(WindowAndroidObserver* observer) {
     66   observer_list_.RemoveObserver(observer);
     67 }
     68 
     69 void WindowAndroid::AttachCompositor() {
     70   FOR_EACH_OBSERVER(WindowAndroidObserver,
     71                     observer_list_,
     72                     OnAttachCompositor());
     73 }
     74 
     75 void WindowAndroid::DetachCompositor() {
     76   FOR_EACH_OBSERVER(WindowAndroidObserver,
     77                     observer_list_,
     78                     OnDetachCompositor());
     79   observer_list_.Clear();
     80 }
     81 
     82 // ----------------------------------------------------------------------------
     83 // Native JNI methods
     84 // ----------------------------------------------------------------------------
     85 
     86 jlong Init(JNIEnv* env, jobject obj) {
     87   WindowAndroid* window = new WindowAndroid(env, obj);
     88   return reinterpret_cast<intptr_t>(window);
     89 }
     90 
     91 }  // namespace ui
     92