layout_text.h | Explore in Territory

/*
 * (C) 1999 Lars Knoll ([email protected])
 * (C) 2000 Dirk Mueller ([email protected])
 * Copyright (C) 2004-2009, 2013 Apple Inc. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * along with this library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 *
 */

#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_LAYOUT_LAYOUT_TEXT_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_LAYOUT_LAYOUT_TEXT_H_

#include <iterator>

#include "base/check_op.h"
#include "base/dcheck_is_on.h"
#include "base/memory/scoped_refptr.h"
#include "base/notreached.h"
#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/core/dom/text.h"
#include "third_party/blink/renderer/core/layout/inline/inline_item_span.h"
#include "third_party/blink/renderer/core/layout/layout_object.h"
#include "third_party/blink/renderer/platform/geometry/length_functions.h"
#include "third_party/blink/renderer/platform/graphics/dom_node_id.h"
#include "third_party/blink/renderer/platform/wtf/forward.h"

namespace blink {

class AbstractInlineTextBox;
class ContentCaptureManager;
class OffsetMapping;
struct InlineItemsData;
struct InlineItemSpan;
struct TextDiffRange;
struct VariableLengthTransformResult;

// LayoutText is the root class for anything that represents
// a text node (see core/dom/text.h).
//
// This is a common node in the tree so to the limit memory overhead,
// this class inherits directly from LayoutObject.
// Also this class is used by both CSS and SVG layouts so LayoutObject
// was a natural choice.
//
// The actual layout of text is handled by the containing inline
// (LayoutInline) or block (LayoutBlockFlow). They will invoke the Unicode
// Bidirectional Algorithm to break the text into actual lines.
// The result of layout is the line box tree, which represents lines
// on the screen. It is stored into m_firstTextBox and m_lastTextBox.
// To understand how lines are broken by the bidi algorithm, read e.g.
// LayoutBlockFlow::LayoutInlineChildren.
//
// The previous comment applies also for painting. See e.g.
// BlockFlowPainter::paintContents in particular the use of LineBoxListPainter.
class CORE_EXPORT LayoutText : public LayoutObject { … };

inline wtf_size_t LayoutText::FirstInlineFragmentItemIndex() const { … }

inline void LayoutText::DetachAbstractInlineTextBoxesIfNeeded() { … }

template <>
struct DowncastTraits<LayoutText> { … };

inline LayoutText* Text::GetLayoutObject() const { … }

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_CORE_LAYOUT_LAYOUT_TEXT_H_
chromium/third_party/blink/renderer/core/layout/layout_text.h
