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

/*
 * This file is part of the select element layoutObject in WebCore.
 *
 * Copyright (C) 2006, 2007, 2009 Apple Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1.  Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 * 2.  Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
 *     its contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef LayoutListBox_h
#define LayoutListBox_h

#include "core/layout/LayoutBlockFlow.h"

namespace blink {

class HTMLSelectElement;

class LayoutListBox final : public LayoutBlockFlow {
 public:
  explicit LayoutListBox(Element*);
  ~LayoutListBox() override;

  unsigned size() const;

  // Unlike scrollRectToVisible this will not scroll parent boxes.
  void scrollToRect(const LayoutRect&);

  const char* name() const override { return "LayoutListBox"; }

 private:
  HTMLSelectElement* selectElement() const;

  bool isOfType(LayoutObjectType type) const override {
    return type == LayoutObjectListBox || LayoutBlockFlow::isOfType(type);
  }

  void computeLogicalHeight(LayoutUnit logicalHeight,
                            LayoutUnit logicalTop,
                            LogicalExtentComputedValues&) const override;
  void computeIntrinsicLogicalWidths(
      LayoutUnit& minLogicalWidth,
      LayoutUnit& maxLogicalWidth) const override;

  void stopAutoscroll() override;

  LayoutUnit defaultItemHeight() const;
  LayoutUnit itemHeight() const;
};

DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutListBox, isListBox());

}  // namespace blink

#endif  // LayoutListBox_h