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// 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 "cc/input/scroll_state.h"
#include <utility>
#include "cc/layers/layer_impl.h"
namespace cc {
ScrollState::ScrollState(double delta_x,
double delta_y,
int start_position_x,
int start_position_y,
double velocity_x,
double velocity_y,
bool is_beginning,
bool is_in_inertial_phase,
bool is_ending,
bool should_propagate,
bool delta_consumed_for_scroll_sequence,
bool is_direct_manipulation)
: data_(delta_x,
delta_y,
start_position_x,
start_position_y,
velocity_x,
velocity_y,
is_beginning,
is_in_inertial_phase,
is_ending,
should_propagate,
delta_consumed_for_scroll_sequence,
is_direct_manipulation) {}
ScrollState::ScrollState(ScrollStateData data) : data_(data) {}
ScrollState::~ScrollState() {}
void ScrollState::ConsumeDelta(double x, double y) {
data_.delta_x -= x;
data_.delta_y -= y;
if (x || y)
data_.delta_consumed_for_scroll_sequence = true;
}
void ScrollState::DistributeToScrollChainDescendant() {
if (!scroll_chain_.empty()) {
LayerImpl* next = scroll_chain_.front();
scroll_chain_.pop_front();
next->DistributeScroll(this);
}
}
} // namespace cc
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