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// Copyright 2023 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.
#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_SCROLL_SNAP_EVENT_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_SCROLL_SNAP_EVENT_H_
#include "third_party/blink/renderer/core/dom/events/event.h"
#include "third_party/blink/renderer/core/dom/node.h"
#include "third_party/blink/renderer/core/dom/static_node_list.h"
#include "third_party/blink/renderer/platform/bindings/script_wrappable.h"
#include "third_party/blink/renderer/platform/heap/garbage_collected.h"
#include "third_party/blink/renderer/platform/wtf/text/atomic_string.h"
namespace blink {
class SnapEventInit;
// This class implements the SnapEvent interface for scroll-snap-related
// JavaScript events, scrollsnapchange and scrollsnapchanging.
// SnapEvents are sent to a scroller when it snaps to a different element from
// the element to which it was previously snapped along either axis.
// https://drafts.csswg.org/css-scroll-snap-2/#scrollsnapchange-and-scrollsnapchanging
class SnapEvent : public Event {
DEFINE_WRAPPERTYPEINFO();
public:
static SnapEvent* Create(const AtomicString& type,
SnapEventInit const* initializer);
static SnapEvent* Create(const AtomicString& type,
Bubbles bubbles,
Member<Node> block_target,
Member<Node> inline_target);
SnapEvent(const AtomicString& type,
Bubbles bubbles,
Member<Node> block_target,
Member<Node> inline_target);
Node* snapTargetBlock() { return snap_target_block_.Get(); }
Node* snapTargetInline() { return snap_target_inline_.Get(); }
void Trace(Visitor* visitor) const override {
visitor->Trace(snap_target_block_);
visitor->Trace(snap_target_inline_);
Event::Trace(visitor);
}
private:
// This are the elements that the scrolling container selected as snap targets
// for the related snap event.
Member<Node> snap_target_block_;
Member<Node> snap_target_inline_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_SCROLL_SNAP_EVENT_H_
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