Unify Android Webview and Chrome's fling

android_webview/native/aw_contents.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 "android_webview/native/aw_contents.h"
 
 #include <limits>
 
 #include "android_webview/browser/aw_browser_context.h"
 #include "android_webview/browser/aw_browser_main_parts.h"
@@ skipping 922 matching lines @@
 void AwContents::FocusFirstNode(JNIEnv* env, jobject obj) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   web_contents_->FocusThroughTabTraversal(false);
 }
 
 void AwContents::SetBackgroundColor(JNIEnv* env, jobject obj, jint color) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   render_view_host_ext_->SetBackgroundColor(color);
 }
 
+void AwContents::OnComputeScroll(JNIEnv* env,
+                                 jobject obj,
+                                 jlong animation_time_millis) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  browser_view_renderer_.OnComputeScroll(
+      base::TimeTicks() +
+      base::TimeDelta::FromMilliseconds(animation_time_millis));
+}
+
 jlong AwContents::ReleasePopupAwContents(JNIEnv* env, jobject obj) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   return reinterpret_cast<intptr_t>(pending_contents_.release());
 }
 
 gfx::Point AwContents::GetLocationOnScreen() {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   JNIEnv* env = AttachCurrentThread();
   ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
   if (obj.is_null())
     return gfx::Point();
   std::vector<int> location;
   base::android::JavaIntArrayToIntVector(
       env,
       Java_AwContents_getLocationOnScreen(env, obj.obj()).obj(),
       &location);
   return gfx::Point(location[0], location[1]);
 }
 
 void AwContents::ScrollContainerViewTo(gfx::Vector2d new_value) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   JNIEnv* env = AttachCurrentThread();
   ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
   if (obj.is_null())
     return;
   Java_AwContents_scrollContainerViewTo(
       env, obj.obj(), new_value.x(), new_value.y());
 }
 
-bool AwContents::IsFlingActive() const {
+bool AwContents::IsSmoothScrollingActive() const {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   JNIEnv* env = AttachCurrentThread();
   ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
   if (obj.is_null())
     return false;
-  return Java_AwContents_isFlingActive(env, obj.obj());
+  return Java_AwContents_isSmoothScrollingActive(env, obj.obj());
 }
 
 void AwContents::UpdateScrollState(gfx::Vector2d max_scroll_offset,
                                    gfx::SizeF contents_size_dip,
                                    float page_scale_factor,
                                    float min_page_scale_factor,
                                    float max_page_scale_factor) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   JNIEnv* env = AttachCurrentThread();
   ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
   if (obj.is_null())
     return;
   Java_AwContents_updateScrollState(env,
                                     obj.obj(),
                                     max_scroll_offset.x(),
                                     max_scroll_offset.y(),
                                     contents_size_dip.width(),
                                     contents_size_dip.height(),
                                     page_scale_factor,
                                     min_page_scale_factor,
                                     max_page_scale_factor);
 }
 
-void AwContents::DidOverscroll(gfx::Vector2d overscroll_delta) {
+void AwContents::DidOverscroll(gfx::Vector2d overscroll_delta,
+                               gfx::Vector2dF overscroll_velocity) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   JNIEnv* env = AttachCurrentThread();
   ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
   if (obj.is_null())
     return;
-  Java_AwContents_didOverscroll(
-      env, obj.obj(), overscroll_delta.x(), overscroll_delta.y());
+  Java_AwContents_didOverscroll(env, obj.obj(), overscroll_delta.x(),
+                                overscroll_delta.y(), overscroll_velocity.x(),
+                                overscroll_velocity.y());
 }
 
 void AwContents::SetDipScale(JNIEnv* env, jobject obj, jfloat dip_scale) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   SetDipScaleInternal(dip_scale);
 }
 
 void AwContents::SetDipScaleInternal(float dip_scale) {
   browser_view_renderer_.SetDipScale(dip_scale);
 }
@@ skipping 145 matching lines @@
 
   AwMessagePortServiceImpl::GetInstance()->CreateMessageChannel(env, ports,
       GetMessagePortMessageFilter());
 }
 
 void SetShouldDownloadFavicons(JNIEnv* env, jclass jclazz) {
   g_should_download_favicons = true;
 }
 
 }  // namespace android_webview