chromium/third_party/blink/renderer/core/frame/pagination_state.h

// Copyright 2024 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_PAGINATION_STATE_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_FRAME_PAGINATION_STATE_H_

#include "third_party/blink/renderer/platform/heap/collection_support/heap_vector.h"
#include "third_party/blink/renderer/platform/heap/garbage_collected.h"
#include "third_party/blink/renderer/platform/wtf/wtf_size_t.h"

namespace blink {

class ClipPaintPropertyNodeOrAlias;
class ComputedStyle;
class Document;
class LayoutBlockFlow;
class LayoutObject;
class LayoutView;
class ObjectPaintProperties;
class PropertyTreeState;
class TransformPaintPropertyNodeOrAlias;

// Holds structures and state needed during pagination (layout and painting).
//
// Created before layout for pagination, and destroyed when leaving paginated
// layout.
//
// For each page box that is being laid out, layout objects will be created for
// each part of a page box that may need to paint something (page container,
// page border box, and any @page margins).
//
// PaginationState also keeps track of the current page to print, and the paint
// properties (translation, scaling and clipping) that are to be applied to the
// document contents. Nothing outside the page area (@page margin, border and
// padding) is affected by these properties.
//
// The paint properties are placed in the tree between the properties of the
// LayoutView and its children. They are created during pre-paint, and updated
// for each page printed. They affect all paginated content, but not things
// outside the page area, such as @page decorations / margins.
class PaginationState : public GarbageCollected<PaginationState> { … };

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_CORE_FRAME_PAGINATION_STATE_H_