physical_fragment.h | Explore in Territory

// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifdef UNSAFE_BUFFERS_BUILD
// TODO(crbug.com/351564777): Remove this and convert code to safer constructs.
#pragma allow_unsafe_buffers
#endif

#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_LAYOUT_PHYSICAL_FRAGMENT_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_LAYOUT_PHYSICAL_FRAGMENT_H_

#include <unicode/ubidi.h>

#include <iterator>
#include <optional>

#include "base/containers/span.h"
#include "base/dcheck_is_on.h"
#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/core/editing/forward.h"
#include "third_party/blink/renderer/core/layout/anchor_evaluator_impl.h"
#include "third_party/blink/renderer/core/layout/break_token.h"
#include "third_party/blink/renderer/core/layout/geometry/physical_offset.h"
#include "third_party/blink/renderer/core/layout/geometry/physical_rect.h"
#include "third_party/blink/renderer/core/layout/geometry/physical_size.h"
#include "third_party/blink/renderer/core/layout/ink_overflow.h"
#include "third_party/blink/renderer/core/layout/layout_box.h"
#include "third_party/blink/renderer/core/layout/layout_inline.h"
#include "third_party/blink/renderer/core/layout/physical_fragment_link.h"
#include "third_party/blink/renderer/core/layout/style_variant.h"
#include "third_party/blink/renderer/core/scroll/scroll_start_targets.h"
#include "third_party/blink/renderer/platform/graphics/touch_action.h"
#include "third_party/blink/renderer/platform/heap/collection_support/heap_hash_set.h"

namespace blink {

class ComputedStyle;
class FragmentBuilder;
class FragmentData;
class Node;
class PaintLayer;
enum class OutlineType;
struct FragmentedOofData;
struct LogicalRect;
struct PhysicalOofPositionedNode;

// The PhysicalFragment contains the output geometry from layout. The
// fragment stores all of its information in the physical coordinate system for
// use by paint, hit-testing etc.
//
// The fragment keeps a pointer back to the LayoutObject which generated it.
// Once we have transitioned fully to LayoutNG it should be a const pointer
// such that paint/hit-testing/etc don't modify it.
//
// Layout code should only access geometry information through the
// LogicalFragment wrapper classes which transforms information into the logical
// coordinate system.
class CORE_EXPORT PhysicalFragment : public GarbageCollected<PhysicalFragment> { … };

CORE_EXPORT std::ostream& operator<<(std::ostream&, const PhysicalFragment*);
CORE_EXPORT std::ostream& operator<<(std::ostream&, const PhysicalFragment&);

#if !DCHECK_IS_ON()
inline void PhysicalFragment::CheckType() const {}
#endif

}  // namespace blink

#if DCHECK_IS_ON()
// Outside the blink namespace for ease of invocation from a debugger.

// Output the fragment tree to the log.
// See DumpFragmentTree().
CORE_EXPORT void ShowFragmentTree(const blink::PhysicalFragment*);

// Output the fragment tree(s) inside |root| to the log.
// See DumpFragmentTree(const LayoutObject& ...).
CORE_EXPORT void ShowFragmentTree(
    const blink::LayoutObject& root,
    const blink::PhysicalFragment* target = nullptr);

// Output the fragment tree(s) from the entire document to the log.
// See DumpFragmentTree(const LayoutObject& ...).
CORE_EXPORT void ShowEntireFragmentTree(const blink::LayoutObject& target);
CORE_EXPORT void ShowEntireFragmentTree(const blink::PhysicalFragment* target);
#endif  // DCHECK_IS_ON()

#endif  // THIRD_PARTY_BLINK_RENDERER_CORE_LAYOUT_PHYSICAL_FRAGMENT_H_
chromium/third_party/blink/renderer/core/layout/physical_fragment.h
