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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/trees/layer_tree_impl.h"
#include "cc/trees/scroll_node.h"
namespace cc {
ScrollState::ScrollState(ScrollStateData data)
: data_(data), layer_tree_impl_(nullptr) {}
ScrollState::ScrollState(const ScrollState& other) = default;
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()) {
ScrollNode* next = scroll_chain_.front();
scroll_chain_.pop_front();
ScrollTree& scroll_tree = layer_tree_impl_->property_trees()->scroll_tree;
scroll_tree.DistributeScroll(next, this);
}
}
} // namespace cc
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