Move middle-click autoscroll to synthetic fling.

content/browser/renderer_host/render_widget_host_impl.cc

 // Copyright (c) 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/renderer_host/render_widget_host_impl.h"
 
 #include <math.h>
 
 #include <set>
 #include <tuple>
@@ skipping 73 matching lines @@
 #include "storage/browser/fileapi/isolated_context.h"
 #include "third_party/WebKit/public/web/WebCompositionUnderline.h"
 #include "ui/base/clipboard/clipboard.h"
 #include "ui/display/display_switches.h"
 #include "ui/events/blink/web_input_event_traits.h"
 #include "ui/events/event.h"
 #include "ui/events/keycodes/keyboard_codes.h"
 #include "ui/gfx/color_space.h"
 #include "ui/gfx/geometry/size_conversions.h"
 #include "ui/gfx/geometry/vector2d_conversions.h"
+#include "ui/gfx/geometry/vector2d_f.h"
 #include "ui/gfx/image/image.h"
 #include "ui/gfx/image/image_skia.h"
 #include "ui/gfx/skbitmap_operations.h"
 #include "ui/snapshot/snapshot.h"
 
 #if defined(OS_ANDROID)
 #include "ui/android/view_android.h"
 #else
 #include "content/browser/compositor/image_transport_factory.h"
 // nogncheck as dependency of "ui/compositor" is on non-Android platforms only.
@@ skipping 452 matching lines @@
     IPC_MESSAGE_HANDLER(InputHostMsg_ImeCancelComposition,
                         OnImeCancelComposition)
     IPC_MESSAGE_HANDLER(ViewHostMsg_Close, OnClose)
     IPC_MESSAGE_HANDLER(ViewHostMsg_UpdateScreenRects_ACK,
                         OnUpdateScreenRectsAck)
     IPC_MESSAGE_HANDLER(ViewHostMsg_RequestMove, OnRequestMove)
     IPC_MESSAGE_HANDLER(ViewHostMsg_SetTooltipText, OnSetTooltipText)
     IPC_MESSAGE_HANDLER(ViewHostMsg_DidNotProduceFrame, DidNotProduceFrame)
     IPC_MESSAGE_HANDLER(ViewHostMsg_UpdateRect, OnUpdateRect)
     IPC_MESSAGE_HANDLER(ViewHostMsg_SetCursor, OnSetCursor)
+    IPC_MESSAGE_HANDLER(ViewHostMsg_AutoscrollStart, OnAutoscrollStart)
+    IPC_MESSAGE_HANDLER(ViewHostMsg_AutoscrollFling, OnAutoscrollFling)
+    IPC_MESSAGE_HANDLER(ViewHostMsg_AutoscrollEnd, OnAutoscrollEnd)
     IPC_MESSAGE_HANDLER(ViewHostMsg_TextInputStateChanged,
                         OnTextInputStateChanged)
     IPC_MESSAGE_HANDLER(ViewHostMsg_LockMouse, OnLockMouse)
     IPC_MESSAGE_HANDLER(ViewHostMsg_UnlockMouse, OnUnlockMouse)
     IPC_MESSAGE_HANDLER(ViewHostMsg_ShowDisambiguationPopup,
                         OnShowDisambiguationPopup)
     IPC_MESSAGE_HANDLER(ViewHostMsg_SelectionBoundsChanged,
                         OnSelectionBoundsChanged)
     IPC_MESSAGE_HANDLER(InputHostMsg_ImeCompositionRangeChanged,
                         OnImeCompositionRangeChanged)
@@ skipping 1453 matching lines @@
   QueueSyntheticGesture(
         SyntheticGesture::Create(*gesture_packet.gesture_params()),
         base::Bind(&RenderWidgetHostImpl::OnSyntheticGestureCompleted,
                    weak_factory_.GetWeakPtr()));
 }
 
 void RenderWidgetHostImpl::OnSetCursor(const WebCursor& cursor) {
   SetCursor(cursor);
 }
 
+void RenderWidgetHostImpl::OnAutoscrollStart(const gfx::PointF& position) {
+  WebGestureEvent scroll_begin = SyntheticWebGestureEventBuilder::Build(
+      WebInputEvent::kGestureScrollBegin,
+      blink::kWebGestureDeviceSyntheticAutoscroll);
+
+  scroll_begin.x = position.x();
+  scroll_begin.y = position.y();
+  scroll_begin.source_device = blink::kWebGestureDeviceSyntheticAutoscroll;
+
+  input_router_->SendGestureEvent(GestureEventWithLatencyInfo(scroll_begin));
+}
+
+void RenderWidgetHostImpl::OnAutoscrollFling(const gfx::Vector2dF& velocity) {
+  WebGestureEvent event = SyntheticWebGestureEventBuilder::Build(
+      WebInputEvent::kGestureFlingStart,
+      blink::kWebGestureDeviceSyntheticAutoscroll);
+  event.data.fling_start.velocity_x = velocity.x();
+  event.data.fling_start.velocity_y = velocity.y();
+  event.source_device = blink::kWebGestureDeviceSyntheticAutoscroll;
+
+  input_router_->SendGestureEvent(GestureEventWithLatencyInfo(event));
+}
+
+void RenderWidgetHostImpl::OnAutoscrollEnd() {
+  WebGestureEvent cancel_event = SyntheticWebGestureEventBuilder::Build(
+      WebInputEvent::kGestureFlingCancel,
+      blink::kWebGestureDeviceSyntheticAutoscroll);
+  cancel_event.data.fling_cancel.prevent_boosting = true;
+  input_router_->SendGestureEvent(GestureEventWithLatencyInfo(cancel_event));
+
+  WebGestureEvent end_event = SyntheticWebGestureEventBuilder::Build(
+      WebInputEvent::kGestureScrollEnd,
+      blink::kWebGestureDeviceSyntheticAutoscroll);
+  input_router_->SendGestureEvent(GestureEventWithLatencyInfo(end_event));
+}
+
 void RenderWidgetHostImpl::SetTouchEventEmulationEnabled(
     bool enabled, ui::GestureProviderConfigType config_type) {
   if (enabled) {
     if (!touch_emulator_) {
       touch_emulator_.reset(new TouchEmulator(
           this,
           view_.get() ? content::GetScaleFactorForView(view_.get()) : 1.0f));
     }
     touch_emulator_->Enable(config_type);
   } else {
@@ skipping 620 matching lines @@
           device::mojom::WakeLockType::PreventDisplaySleep,
           device::mojom::WakeLockReason::ReasonOther, "GetSnapshot",
           std::move(request));
     }
   }
   return wake_lock_.get();
 }
 #endif
 
 }  // namespace content