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// Copyright 2014 The Chromium Authors
// 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_FRAME_FRAME_CLIENT_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_FRAME_FRAME_CLIENT_H_
#include "base/unguessable_token.h"
#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/platform/graphics/dom_node_id.h"
#include "third_party/blink/renderer/platform/heap/garbage_collected.h"
namespace gfx {
class Rect;
}
namespace blink {
class LocalFrame;
enum class FrameDetachType;
class CORE_EXPORT FrameClient : public GarbageCollected<FrameClient> {
public:
virtual bool InShadowTree() const = 0;
virtual void Detached(FrameDetachType) = 0;
virtual unsigned BackForwardLength() = 0;
// For the main frame, called when the main frame's dimensions have changed,
// e.g. resizing a tab causes the document width to change; loading additional
// content causes the document height to increase; explicitly changing the
// height of the body element.
//
// For a subframe, called when the intersection rect between the main frame
// and the subframe has changed, e.g. the subframe is initially added; the
// subframe's position is updated explicitly or inherently (e.g. sticky
// position while the page is being scrolled).
virtual void OnMainFrameIntersectionChanged(
const gfx::Rect& main_frame_intersection_rect) {}
// Called when the main frame's viewport rectangle (the viewport dimensions
// and the scroll position) changed, e.g. the user scrolled the main frame or
// the viewport dimensions themselves changed. Only invoked on the main frame.
virtual void OnMainFrameViewportRectangleChanged(
const gfx::Rect& main_frame_viewport_rect) {}
// Called when an image ad rectangle changed. An empty `image_ad_rect` is used
// to signal the removal of the rectangle. Only invoked on the main frame.
virtual void OnMainFrameImageAdRectangleChanged(
DOMNodeId element_id,
const gfx::Rect& image_ad_rect) {}
virtual ~FrameClient() = default;
virtual void Trace(Visitor* visitor) const {}
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_FRAME_FRAME_CLIENT_H_
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