content/child/fling_curve_configuration.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "content/child/fling_curve_configuration.h"
   6
   7 #include "base/logging.h"
   8 #include "content/child/touch_fling_gesture_curve.h"
   9 #include "third_party/WebKit/public/platform/WebGestureCurve.h"
  10
  11 namespace content {
  12
  13 FlingCurveConfiguration::FlingCurveConfiguration() { }
  14
  15 FlingCurveConfiguration::~FlingCurveConfiguration() { }
  16
  17 void FlingCurveConfiguration::SetCurveParameters(
  18     const std::vector<float>& new_touchpad,
  19     const std::vector<float>& new_touchscreen) {
  20   DCHECK(new_touchpad.size() >= 3);
  21   DCHECK(new_touchscreen.size() >= 3);
  22   base::AutoLock scoped_lock(lock_);
  23   touchpad_coefs_ = new_touchpad;
  24   touchscreen_coefs_ = new_touchscreen;
  25 }
  26
  27 blink::WebGestureCurve* FlingCurveConfiguration::CreateCore(
  28     const std::vector<float>& coefs,
  29     const blink::WebFloatPoint& velocity,
  30     const blink::WebSize& cumulativeScroll) {
  31   float p0, p1, p2;
  32
  33   {
  34     base::AutoLock scoped_lock(lock_);
  35     p0 = coefs[0];
  36     p1 = coefs[1];
  37     p2 = coefs[2];
  38   }
  39
  40   return TouchFlingGestureCurve::Create(velocity, p0, p1, p2,
  41       cumulativeScroll);
  42 }
  43
  44 blink::WebGestureCurve* FlingCurveConfiguration::CreateForTouchPad(
  45     const blink::WebFloatPoint& velocity,
  46     const blink::WebSize& cumulativeScroll) {
  47   return CreateCore(touchpad_coefs_, velocity, cumulativeScroll);
  48 }
  49
  50 blink::WebGestureCurve* FlingCurveConfiguration::CreateForTouchScreen(
  51     const blink::WebFloatPoint& velocity,
  52     const blink::WebSize& cumulativeScroll) {
  53   return CreateCore(touchscreen_coefs_, velocity, cumulativeScroll);
  54 }
  55
  56 } // namespace content