third_party/WebKit/Source/platform/exported/WebActiveGestureAnimation.cpp

/*
 * Copyright (C) 2012 Google Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1.  Redistributions of source code must retain the above copyright
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 * 2.  Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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#include "platform/exported/WebActiveGestureAnimation.h"

#include <memory>
#include "platform/wtf/PtrUtil.h"
#include "public/platform/WebGestureCurve.h"
#include "public/platform/WebGestureCurveTarget.h"

namespace blink {

std::unique_ptr<WebActiveGestureAnimation>
WebActiveGestureAnimation::CreateAtAnimationStart(
    std::unique_ptr<WebGestureCurve> curve,
    WebGestureCurveTarget* target) {
  return WTF::WrapUnique(
      new WebActiveGestureAnimation(std::move(curve), target, 0, true));
}

std::unique_ptr<WebActiveGestureAnimation>
WebActiveGestureAnimation::CreateWithTimeOffset(
    std::unique_ptr<WebGestureCurve> curve,
    WebGestureCurveTarget* target,
    double start_time) {
  return WTF::WrapUnique(new WebActiveGestureAnimation(std::move(curve), target,
                                                       start_time, false));
}

WebActiveGestureAnimation::~WebActiveGestureAnimation() {}

WebActiveGestureAnimation::WebActiveGestureAnimation(
    std::unique_ptr<WebGestureCurve> curve,
    WebGestureCurveTarget* target,
    double start_time,
    bool waiting_for_first_tick)
    : start_time_(start_time),
      waiting_for_first_tick_(waiting_for_first_tick),
      curve_(std::move(curve)),
      target_(target) {}

bool WebActiveGestureAnimation::Animate(double time) {
  if (waiting_for_first_tick_) {
    start_time_ = time;
    waiting_for_first_tick_ = false;
  }
  // All WebGestureCurves assume zero-based time, so we subtract
  // the animation start time before passing to the curve.
  return curve_->Apply(time - start_time_, target_);
}

}  // namespace blink