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mojo/services/native_viewport/platform_viewport_android.cc

+// Copyright 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "mojo/services/native_viewport/platform_viewport_android.h"
+
+#include <android/input.h>
+#include <android/native_window_jni.h>
+
+#include "base/android/jni_android.h"
+#include "jni/PlatformViewportAndroid_jni.h"
+#include "mojo/converters/geometry/geometry_type_converters.h"
+#include "mojo/converters/input_events/input_events_type_converters.h"
+#include "ui/events/event.h"
+#include "ui/events/keycodes/keyboard_code_conversion_android.h"
+#include "ui/gfx/geometry/point.h"
+
+namespace native_viewport {
+namespace {
+
+mojo::EventType MotionEventActionToEventType(jint action) {
+  switch (action) {
+    case AMOTION_EVENT_ACTION_DOWN:
+    case AMOTION_EVENT_ACTION_POINTER_DOWN:
+      return mojo::EVENT_TYPE_POINTER_DOWN;
+    case AMOTION_EVENT_ACTION_UP:
+    case AMOTION_EVENT_ACTION_POINTER_UP:
+      return mojo::EVENT_TYPE_POINTER_UP;
+    case AMOTION_EVENT_ACTION_MOVE:
+      return mojo::EVENT_TYPE_POINTER_MOVE;
+    case AMOTION_EVENT_ACTION_CANCEL:
+      return mojo::EVENT_TYPE_POINTER_CANCEL;
+    case AMOTION_EVENT_ACTION_OUTSIDE:
+    case AMOTION_EVENT_ACTION_HOVER_MOVE:
+    case AMOTION_EVENT_ACTION_SCROLL:
+    case AMOTION_EVENT_ACTION_HOVER_ENTER:
+    case AMOTION_EVENT_ACTION_HOVER_EXIT:
+    default:
+      NOTIMPLEMENTED() << "Unimplemented motion action: " << action;
+  }
+  return mojo::EVENT_TYPE_UNKNOWN;
+}
+
+}  // namespace
+
+////////////////////////////////////////////////////////////////////////////////
+// PlatformViewportAndroid, public:
+
+// static
+bool PlatformViewportAndroid::Register(JNIEnv* env) {
+  return RegisterNativesImpl(env);
+}
+
+PlatformViewportAndroid::PlatformViewportAndroid(Delegate* delegate)
+    : delegate_(delegate),
+      window_(NULL),
+      id_generator_(0),
+      weak_factory_(this) {
+}
+
+PlatformViewportAndroid::~PlatformViewportAndroid() {
+  if (window_)
+    ReleaseWindow();
+}
+
+void PlatformViewportAndroid::Destroy(JNIEnv* env, jobject obj) {
+  delegate_->OnDestroyed();
+}
+
+void PlatformViewportAndroid::SurfaceCreated(JNIEnv* env,
+                                             jobject obj,
+                                             jobject jsurface) {
+  base::android::ScopedJavaLocalRef<jobject> protector(env, jsurface);
+  // Note: This ensures that any local references used by
+  // ANativeWindow_fromSurface are released immediately. This is needed as a
+  // workaround for https://code.google.com/p/android/issues/detail?id=68174
+  {
+    base::android::ScopedJavaLocalFrame scoped_local_reference_frame(env);
+    window_ = ANativeWindow_fromSurface(env, jsurface);
+  }
+  delegate_->OnAcceleratedWidgetAvailable(window_);
+}
+
+void PlatformViewportAndroid::SurfaceDestroyed(JNIEnv* env, jobject obj) {
+  DCHECK(window_);
+  delegate_->OnAcceleratedWidgetDestroyed();
+  ReleaseWindow();
+}
+
+void PlatformViewportAndroid::SurfaceSetSize(JNIEnv* env,
+                                             jobject obj,
+                                             jint width,
+                                             jint height,
+                                             jfloat density) {
+  metrics_ = mojo::ViewportMetrics::New();
+  metrics_->size = mojo::Size::New();
+  metrics_->size->width = static_cast<int>(width);
+  metrics_->size->height = static_cast<int>(height);
+  metrics_->device_pixel_ratio = density;
+  delegate_->OnMetricsChanged(metrics_.Clone());
+}
+
+bool PlatformViewportAndroid::TouchEvent(JNIEnv* env,
+                                         jobject obj,
+                                         jlong time_ms,
+                                         jint masked_action,
+                                         jint pointer_id,
+                                         jfloat x,
+                                         jfloat y,
+                                         jfloat pressure,
+                                         jfloat touch_major,
+                                         jfloat touch_minor,
+                                         jfloat orientation,
+                                         jfloat h_wheel,
+                                         jfloat v_wheel) {
+  mojo::EventPtr event(mojo::Event::New());
+  event->time_stamp = time_ms;
+  event->action = MotionEventActionToEventType(masked_action);
+  if (event->action == mojo::EVENT_TYPE_UNKNOWN)
+    return false;
+
+  event->pointer_data = mojo::PointerData::New();
+  event->pointer_data->pointer_id = pointer_id;
+  event->pointer_data->x = x;
+  event->pointer_data->y = y;
+  event->pointer_data->screen_x = x;
+  event->pointer_data->screen_y = y;
+  event->pointer_data->pressure = pressure;
+  event->pointer_data->radius_major = touch_major;
+  event->pointer_data->radius_minor = touch_minor;
+  event->pointer_data->orientation = orientation;
+  event->pointer_data->horizontal_wheel = h_wheel;
+  event->pointer_data->vertical_wheel = v_wheel;
+  delegate_->OnEvent(event.Pass());
+
+  return true;
+}
+
+bool PlatformViewportAndroid::KeyEvent(JNIEnv* env,
+                                       jobject obj,
+                                       bool pressed,
+                                       jint key_code,
+                                       jint unicode_character) {
+  ui::KeyEvent event(pressed ? ui::ET_KEY_PRESSED : ui::ET_KEY_RELEASED,
+                     ui::KeyboardCodeFromAndroidKeyCode(key_code), 0);
+  event.set_platform_keycode(key_code);
+  delegate_->OnEvent(mojo::Event::From(event));
+  if (pressed && unicode_character) {
+    ui::KeyEvent char_event(unicode_character,
+                            ui::KeyboardCodeFromAndroidKeyCode(key_code), 0);
+    char_event.set_platform_keycode(key_code);
+    delegate_->OnEvent(mojo::Event::From(char_event));
+  }
+  return true;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// PlatformViewportAndroid, PlatformViewport implementation:
+
+void PlatformViewportAndroid::Init(const gfx::Rect& bounds) {
+  JNIEnv* env = base::android::AttachCurrentThread();
+  Java_PlatformViewportAndroid_createForActivity(
+      env,
+      base::android::GetApplicationContext(),
+      reinterpret_cast<jlong>(this));
+}
+
+void PlatformViewportAndroid::Show() {
+  // Nothing to do. View is created visible.
+}
+
+void PlatformViewportAndroid::Hide() {
+  // Nothing to do. View is always visible.
+}
+
+void PlatformViewportAndroid::Close() {
+  // TODO(beng): close activity containing MojoView?
+
+  // TODO(beng): perform this in response to view destruction.
+  delegate_->OnDestroyed();
+}
+
+gfx::Size PlatformViewportAndroid::GetSize() {
+  return metrics_->size.To<gfx::Size>();
+}
+
+void PlatformViewportAndroid::SetBounds(const gfx::Rect& bounds) {
+  NOTIMPLEMENTED();
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// PlatformViewportAndroid, private:
+
+void PlatformViewportAndroid::ReleaseWindow() {
+  ANativeWindow_release(window_);
+  window_ = NULL;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// PlatformViewport, public:
+
+// static
+scoped_ptr<PlatformViewport> PlatformViewport::Create(Delegate* delegate) {
+  return scoped_ptr<PlatformViewport>(
+      new PlatformViewportAndroid(delegate)).Pass();
+}
+
+}  // namespace native_viewport