third_party/WebKit/Source/core/layout/LayoutTextControlMultiLine.h

/*
 * Copyright (C) 2008 Torch Mobile Inc. All rights reserved.
 *               (http://www.torchmobile.com/)
 * Copyright (C) 2009 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 LayoutTextControlMultiLine_h
#define LayoutTextControlMultiLine_h

#include "core/layout/LayoutTextControl.h"

namespace blink {

class HTMLTextAreaElement;

class LayoutTextControlMultiLine final : public LayoutTextControl {
 public:
  LayoutTextControlMultiLine(HTMLTextAreaElement*);
  ~LayoutTextControlMultiLine() override;

 private:
  bool isOfType(LayoutObjectType type) const override {
    return type == LayoutObjectTextArea || LayoutTextControl::isOfType(type);
  }

  bool nodeAtPoint(HitTestResult&,
                   const HitTestLocation& locationInContainer,
                   const LayoutPoint& accumulatedOffset,
                   HitTestAction) override;

  float getAvgCharWidth(const AtomicString& family) const override;
  LayoutUnit preferredContentLogicalWidth(float charWidth) const override;
  LayoutUnit computeControlLogicalHeight(
      LayoutUnit lineHeight,
      LayoutUnit nonContentHeight) const override;
  // We override the two baseline functions because we want our baseline to be
  // the bottom of our margin box.
  int baselinePosition(
      FontBaseline,
      bool firstLine,
      LineDirectionMode,
      LinePositionMode = PositionOnContainingLine) const override;
  int inlineBlockBaseline(LineDirectionMode) const override { return -1; }

  PassRefPtr<ComputedStyle> createInnerEditorStyle(
      const ComputedStyle& startStyle) const override;
  LayoutObject* layoutSpecialExcludedChild(bool relayoutChildren,
                                           SubtreeLayoutScope&) override;
};

DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutTextControlMultiLine, isTextArea());

}  // namespace blink

#endif