Adding synthetic touch/mouse drag [Part1]

content/browser/renderer_host/input/synthetic_smooth_drag_gesture.cc

+// Copyright 2015 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/input/synthetic_smooth_drag_gesture.h"
+
+namespace content {
+
+SyntheticSmoothDragGesture::SyntheticSmoothDragGesture(
+    const SyntheticSmoothDragGestureParams& params)
+    : SyntheticSmoothMoveGesture(params.gesture_source_type,
+                                 params.start_point,
+                                 params.distances,
+                                 params.speed_in_pixels_s,
+                                 true),
+      params_(params) {
+}
+
+SyntheticSmoothDragGesture::~SyntheticSmoothDragGesture() {
+}
+
+SyntheticGesture::Result SyntheticSmoothDragGesture::ForwardInputEvents(
+    const base::TimeTicks& timestamp, SyntheticGestureTarget* target) {
+  if (state_ == SETUP) {
+    if (gesture_source_type_ == SyntheticGestureParams::DEFAULT_INPUT)
+      gesture_source_type_ = target->GetDefaultSyntheticGestureSourceType();
+
+    state_ = STARTED;
+    current_move_segment_ = -1;
+    current_move_segment_stop_time_ = timestamp;
+  }
+
+  DCHECK_NE(gesture_source_type_, SyntheticGestureParams::DEFAULT_INPUT);
+  if (gesture_source_type_ == SyntheticGestureParams::TOUCH_INPUT)
+    ForwardTouchInputEvents(timestamp, target);
+  else if (gesture_source_type_ == SyntheticGestureParams::MOUSE_INPUT)
+    ForwardMouseClickInputEvents(timestamp, target);
+  else
+    return SyntheticGesture::GESTURE_SOURCE_TYPE_NOT_IMPLEMENTED;
+
+  return (state_ == DONE) ? SyntheticGesture::GESTURE_FINISHED
+                          : SyntheticGesture::GESTURE_RUNNING;
+}
+
+}  // namespace content