Replace old with new synthetic gesture framework.

content/browser/renderer_host/input/synthetic_pinch_gesture_new.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 "content/browser/renderer_host/input/synthetic_pinch_gesture_new.h"
-
-#include "content/common/input/input_event.h"
-#include "ui/events/latency_info.h"
-
-namespace content {
-namespace {
-
-// TODO(dominikg): Use touch slop to compute this value.
-const float kMinPointerDistance = 40.0f;
-
-}
-
-SyntheticPinchGestureNew::SyntheticPinchGestureNew(
-    const SyntheticPinchGestureParams& params)
-    : params_(params), started_(false) {
-  DCHECK_GE(params_.total_num_pixels_covered, 0);
-
-  float inner_distance_to_anchor = kMinPointerDistance / 2;
-  float outer_distance_to_anchor =
-      inner_distance_to_anchor + params_.total_num_pixels_covered / 2;
-
-  // Move pointers away from each other to zoom in
-  // or towards each other to zoom out.
-  if (params_.zoom_in) {
-    current_y_0_ = params_.anchor.y() - inner_distance_to_anchor;
-    current_y_1_ = params_.anchor.y() + inner_distance_to_anchor;
-    target_y_0_ = params_.anchor.y() - outer_distance_to_anchor;
-    target_y_1_ = params_.anchor.y() + outer_distance_to_anchor;
-  } else {
-    current_y_0_ = params_.anchor.y() - outer_distance_to_anchor;
-    current_y_1_ = params_.anchor.y() + outer_distance_to_anchor;
-    target_y_0_ = params_.anchor.y() - inner_distance_to_anchor;
-    target_y_1_ = params_.anchor.y() + inner_distance_to_anchor;
-  }
-}
-
-SyntheticPinchGestureNew::~SyntheticPinchGestureNew() {}
-
-SyntheticGestureNew::Result SyntheticPinchGestureNew::ForwardInputEvents(
-    const base::TimeDelta& interval, SyntheticGestureTarget* target) {
-
-  SyntheticGestureParams::GestureSourceType source =
-      params_.gesture_source_type;
-  if (source == SyntheticGestureParams::DEFAULT_INPUT)
-    source = target->GetDefaultSyntheticGestureSourceType();
-
-  if (!target->SupportsSyntheticGestureSourceType(source))
-    return SyntheticGestureNew::GESTURE_SOURCE_TYPE_NOT_SUPPORTED_BY_PLATFORM;
-
-  if (source == SyntheticGestureParams::TOUCH_INPUT)
-    return ForwardTouchInputEvents(interval, target);
-  else
-    return SyntheticGestureNew::GESTURE_SOURCE_TYPE_NOT_IMPLEMENTED;
-}
-
-SyntheticGestureNew::Result SyntheticPinchGestureNew::ForwardTouchInputEvents(
-    const base::TimeDelta& interval, SyntheticGestureTarget* target) {
-  if (HasFinished())
-    return SyntheticGestureNew::GESTURE_FINISHED;
-
-  if (!started_) {
-    touch_event_.PressPoint(params_.anchor.x(), current_y_0_);
-    touch_event_.PressPoint(params_.anchor.x(), current_y_1_);
-    ForwardTouchEvent(target);
-    started_ = true;
-  }
-
-  float delta = GetPositionDelta(interval) / 2;
-  if (params_.zoom_in) {
-    current_y_0_ -= delta;
-    current_y_1_ += delta;
-  } else {
-    current_y_0_ += delta;
-    current_y_1_ -= delta;
-  }
-  touch_event_.MovePoint(0, params_.anchor.x(), current_y_0_);
-  touch_event_.MovePoint(1, params_.anchor.x(), current_y_1_);
-  ForwardTouchEvent(target);
-
-  if (HasFinished()) {
-    touch_event_.ReleasePoint(0);
-    touch_event_.ReleasePoint(1);
-    ForwardTouchEvent(target);
-    return SyntheticGestureNew::GESTURE_FINISHED;
-  }
-
-  return SyntheticGestureNew::GESTURE_RUNNING;
-}
-
-void SyntheticPinchGestureNew::ForwardTouchEvent(
-    SyntheticGestureTarget* target) {
-  target->DispatchInputEventToPlatform(
-      InputEvent(touch_event_, ui::LatencyInfo(), false));
-}
-
-float SyntheticPinchGestureNew::GetPositionDelta(
-    const base::TimeDelta& interval) {
-  return params_.relative_pointer_speed_in_pixels_s * interval.InSecondsF();
-}
-
-bool SyntheticPinchGestureNew::HasFinished() {
-  return params_.zoom_in ? (current_y_0_ <= target_y_0_)
-                         : (current_y_0_ >= target_y_0_);
-}
-
-}  // namespace content