Add EventForwarder for routing touch events

content/browser/android/content_view_core_impl.cc

 // Copyright 2012 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 "content/browser/android/content_view_core_impl.h"
 
 #include <stddef.h>
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_array.h"
@@ skipping 144 matching lines @@
     case WebInputEvent::GesturePinchUpdate:
       return GESTURE_EVENT_TYPE_PINCH_BY;
     case WebInputEvent::GestureTwoFingerTap:
     default:
       NOTREACHED() << "Invalid source gesture type: "
                    << WebInputEvent::GetName(type);
       return -1;
   }
 }
 
-void RecordToolTypeForActionDown(MotionEventAndroid& event) {
-  MotionEventAndroid::Action action = event.GetAction();
-  if (action == MotionEventAndroid::ACTION_DOWN ||
-      action == MotionEventAndroid::ACTION_POINTER_DOWN ||
-      action == MotionEventAndroid::ACTION_BUTTON_PRESS) {
-    UMA_HISTOGRAM_ENUMERATION("Event.AndroidActionDown.ToolType",
-                              event.GetToolType(0),
-                              MotionEventAndroid::TOOL_TYPE_LAST + 1);
-  }
-}
-
 }  // namespace
 
 // Enables a callback when the underlying WebContents is destroyed, to enable
 // nulling the back-pointer.
 class ContentViewCoreImpl::ContentViewUserData
     : public base::SupportsUserData::Data {
  public:
   explicit ContentViewUserData(ContentViewCoreImpl* content_view_core)
       : content_view_core_(content_view_core) {
   }
@@ skipping 678 matching lines @@
     JNIEnv* env,
     const JavaParamRef<jobject>& obj,
     jint orientation) {
   if (device_orientation_ != orientation) {
     base::RecordAction(base::UserMetricsAction("ScreenOrientationChange"));
     device_orientation_ = orientation;
     SendOrientationChangeEventInternal();
   }
 }
 
-jboolean ContentViewCoreImpl::OnTouchEvent(
-    JNIEnv* env,
-    const JavaParamRef<jobject>& obj,
-    const JavaParamRef<jobject>& motion_event,
-    jlong time_ms,
-    jint android_action,
-    jint pointer_count,
-    jint history_size,
-    jint action_index,
-    jfloat pos_x_0,
-    jfloat pos_y_0,
-    jfloat pos_x_1,
-    jfloat pos_y_1,
-    jint pointer_id_0,
-    jint pointer_id_1,
-    jfloat touch_major_0,
-    jfloat touch_major_1,
-    jfloat touch_minor_0,
-    jfloat touch_minor_1,
-    jfloat orientation_0,
-    jfloat orientation_1,
-    jfloat tilt_0,
-    jfloat tilt_1,
-    jfloat raw_pos_x,
-    jfloat raw_pos_y,
-    jint android_tool_type_0,
-    jint android_tool_type_1,
-    jint android_button_state,
-    jint android_meta_state,
-    jboolean is_touch_handle_event) {
-  RenderWidgetHostViewAndroid* rwhv = GetRenderWidgetHostViewAndroid();
-  // Avoid synthesizing a touch event if it cannot be forwarded.
-  if (!rwhv)
-    return false;
-
-  MotionEventAndroid::Pointer pointer0(pointer_id_0,
-                                       pos_x_0,
-                                       pos_y_0,
-                                       touch_major_0,
-                                       touch_minor_0,
-                                       orientation_0,
-                                       tilt_0,
-                                       android_tool_type_0);
-  MotionEventAndroid::Pointer pointer1(pointer_id_1,
-                                       pos_x_1,
-                                       pos_y_1,
-                                       touch_major_1,
-                                       touch_minor_1,
-                                       orientation_1,
-                                       tilt_1,
-                                       android_tool_type_1);
-  MotionEventAndroid event(1.f / dpi_scale(),
-                           env,
-                           motion_event,
-                           time_ms,
-                           android_action,
-                           pointer_count,
-                           history_size,
-                           action_index,
-                           android_button_state,
-                           android_meta_state,
-                           raw_pos_x - pos_x_0,
-                           raw_pos_y - pos_y_0,
-                           &pointer0,
-                           &pointer1);
-
-  RecordToolTypeForActionDown(event);
-
-  return is_touch_handle_event ? rwhv->OnTouchHandleEvent(event)
-                               : rwhv->OnTouchEvent(event);
-}
-
-jboolean ContentViewCoreImpl::SendMouseEvent(JNIEnv* env,
-                                             const JavaParamRef<jobject>& obj,
-                                             jlong time_ms,
-                                             jint android_action,
-                                             jfloat x,
-                                             jfloat y,
-                                             jint pointer_id,
-                                             jfloat pressure,
-                                             jfloat orientation,
-                                             jfloat tilt,
-                                             jint android_action_button,
-                                             jint android_button_state,
-                                             jint android_meta_state,
-                                             jint android_tool_type) {
-  RenderWidgetHostViewAndroid* rwhv = GetRenderWidgetHostViewAndroid();
-  if (!rwhv)
-    return false;
-
-  // Construct a motion_event object minimally, only to convert the raw
-  // parameters to ui::MotionEvent values. Since we used only the cached values
-  // at index=0, it is okay to even pass a null event to the constructor.
-  MotionEventAndroid::Pointer pointer0(
-      pointer_id, x, y, 0.0f /* touch_major */, 0.0f /* touch_minor */,
-      orientation, tilt, android_tool_type);
-
-  MotionEventAndroid motion_event(1.f / dpi_scale(),
-      env,
-      nullptr /* event */,
-      time_ms,
-      android_action,
-      1 /* pointer_count */,
-      0 /* history_size */,
-      0 /* action_index */,
-      android_button_state,
-      android_meta_state,
-      0 /* raw_offset_x_pixels */,
-      0 /* raw_offset_y_pixels */,
-      &pointer0,
-      nullptr);
-
-  RecordToolTypeForActionDown(motion_event);
-
-  // Note: This relies on identical button enum values in MotionEvent and
-  // MotionEventAndroid.
-  rwhv->SendMouseEvent(motion_event, android_action_button);
-
-  return true;
-}
-
 jboolean ContentViewCoreImpl::SendMouseWheelEvent(
     JNIEnv* env,
     const JavaParamRef<jobject>& obj,
     jlong time_ms,
     jfloat x,
     jfloat y,
     jfloat ticks_x,
     jfloat ticks_y,
     jfloat pixels_per_tick) {
   RenderWidgetHostViewAndroid* rwhv = GetRenderWidgetHostViewAndroid();
@@ skipping 203 matching lines @@
 
 void ContentViewCoreImpl::SetMultiTouchZoomSupportEnabled(
     JNIEnv* env,
     const JavaParamRef<jobject>& obj,
     jboolean enabled) {
   RenderWidgetHostViewAndroid* rwhv = GetRenderWidgetHostViewAndroid();
   if (rwhv)
     rwhv->SetMultiTouchZoomSupportEnabled(enabled);
 }
 
+void ContentViewCoreImpl::OnTouchDown(
+    const base::android::ScopedJavaLocalRef<jobject>& event) {
+  JNIEnv* env = AttachCurrentThread();
+  ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
+  if (obj.is_null())
+    return;
+  Java_ContentViewCore_onTouchDown(env, obj, event);
+}
+
 void ContentViewCoreImpl::SetAllowJavascriptInterfacesInspection(
     JNIEnv* env,
     const JavaParamRef<jobject>& obj,
     jboolean allow) {
   java_bridge_dispatcher_host_->SetAllowObjectContentsInspection(allow);
 }
 
 void ContentViewCoreImpl::AddJavascriptInterface(
     JNIEnv* env,
     const JavaParamRef<jobject>& /* obj */,
@@ skipping 266 matching lines @@
            const JavaParamRef<jobject>& jview_android_delegate,
            jlong jwindow_android,
            jfloat dipScale,
            const JavaParamRef<jobject>& retained_objects_set) {
   WebContentsImpl* web_contents = static_cast<WebContentsImpl*>(
       WebContents::FromJavaWebContents(jweb_contents));
   CHECK(web_contents) <<
       "A ContentViewCoreImpl should be created with a valid WebContents.";
   ui::ViewAndroid* view_android = web_contents->GetView()->GetNativeView();
   view_android->SetDelegate(jview_android_delegate);
+  view_android->SetLayout(ui::ViewAndroid::LayoutParams::MatchParent());
 
   ui::WindowAndroid* window_android =
         reinterpret_cast<ui::WindowAndroid*>(jwindow_android);
   DCHECK(window_android);
   window_android->AddChild(view_android);
 
   // TODO: pass dipScale.
   ContentViewCoreImpl* view = new ContentViewCoreImpl(
       env, obj, web_contents, dipScale, retained_objects_set);
   return reinterpret_cast<intptr_t>(view);
@@ skipping 12 matching lines @@
     return ScopedJavaLocalRef<jobject>();
 
   return view->GetJavaObject();
 }
 
 bool RegisterContentViewCore(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 }  // namespace content