WebCore/rendering/RenderListBox.cpp - WebKit - Git at Google

 /**
  * This file is part of the select element renderer in WebCore.
  *
  * Copyright (C) 2006 Apple Computer, Inc.
  *
  * 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., 59 Temple Place - Suite 330,
  * Boston, MA 02111-1307, USA.
  *
  */

 #include "config.h"
 #include "RenderListBox.h"

 #include "Document.h"
 #include "EventHandler.h"
 #include "EventNames.h"
 #include "Frame.h"
 #include "FrameView.h"
 #include "GraphicsContext.h"
 #include "HTMLNames.h"
 #include "HTMLOptGroupElement.h"
 #include "HTMLOptionElement.h"
 #include "HTMLSelectElement.h"
 #include "HitTestResult.h"
 #include "PlatformScrollBar.h"
 #include "RenderBR.h"
 #include "RenderText.h"
 #include "RenderTheme.h"
 #include "RenderView.h"
 #include "TextStyle.h"
 #include <math.h>

 using namespace std;

 namespace WebCore {

 using namespace HTMLNames;
 using namespace EventNames;

 const int optionsSpacingMiddle = 1;
 const int optionsSpacingLeft = 2;

 RenderListBox::RenderListBox(HTMLSelectElement* element)
     : RenderBlock(element)
     , m_optionsChanged(true)
     , m_optionsWidth(0)
     , m_indexOffset(0)
     , m_selectionChanged(true)
     , m_vBar(0)
 {
 }

 RenderListBox::~RenderListBox()
 {
     if (m_vBar && m_vBar->isWidget()) {
         element()->document()->view()->removeChild(static_cast<PlatformScrollbar*>(m_vBar));
         m_vBar->deref();
     }
 }


 void RenderListBox::setStyle(RenderStyle* style)
 {
     RenderBlock::setStyle(style);
     setReplaced(isInline());
 }

 void RenderListBox::updateFromElement()
 {
     HTMLSelectElement* select = static_cast<HTMLSelectElement*>(node());

     if (m_optionsChanged) {
         const Vector<HTMLElement*>& listItems = select->listItems();
         int size = listItems.size();

         float width = 0;
         TextStyle textStyle(0, 0, 0, false, false, false, false);
         for (int i = 0; i < size; ++i) {
             HTMLElement* element = listItems[i];
             String text;
             Font itemFont = style()->font();
             if (element->hasTagName(optionTag))
                 text = static_cast<HTMLOptionElement*>(element)->optionText();
             else if (element->hasTagName(optgroupTag)) {
                 text = static_cast<HTMLOptGroupElement*>(element)->groupLabelText();
                 FontDescription d = itemFont.fontDescription();
                 d.setBold(true);
                 itemFont = Font(d, itemFont.letterSpacing(), itemFont.wordSpacing());
                 itemFont.update();
             }

             if (!text.isEmpty()) {
                 float textWidth = itemFont.floatWidth(TextRun(text.impl()), textStyle);
                 width = max(width, textWidth);
             }
         }
         m_optionsWidth = static_cast<int>(ceilf(width));
         m_optionsChanged = false;
         setNeedsLayoutAndMinMaxRecalc();
     }

     int firstIndex = select->optionToListIndex(select->selectedIndex());
     int lastIndex = select->lastSelectedListIndex();
     if (firstIndex >= 0 && !listIndexIsVisible(firstIndex) && !listIndexIsVisible(lastIndex))
         scrollToRevealElementAtListIndex(firstIndex);
 }

 void RenderListBox::calcMinMaxWidth()
 {
     if (!m_vBar) {
         if (Scrollbar::hasPlatformScrollbars()) {
             PlatformScrollbar* widget = new PlatformScrollbar(this, VerticalScrollbar, SmallScrollbar);
             widget->ref();
             node()->document()->view()->addChild(widget);
             m_vBar = widget;
         }
     }
     if (m_optionsChanged)
         updateFromElement();

     m_minWidth = 0;
     m_maxWidth = 0;

     if (style()->width().isFixed() && style()->width().value() > 0)
         m_minWidth = m_maxWidth = calcContentBoxWidth(style()->width().value());
     else {
         m_maxWidth = m_optionsWidth;
         if (m_vBar)
            m_maxWidth += m_vBar->width();
     }

     if (style()->minWidth().isFixed() && style()->minWidth().value() > 0) {
         m_maxWidth = max(m_maxWidth, calcContentBoxWidth(style()->minWidth().value()));
         m_minWidth = max(m_minWidth, calcContentBoxWidth(style()->minWidth().value()));
     } else if (style()->width().isPercent() || (style()->width().isAuto() && style()->height().isPercent()))
         m_minWidth = 0;
     else
         m_minWidth = m_maxWidth;

     if (style()->maxWidth().isFixed() && style()->maxWidth().value() != undefinedLength) {
         m_maxWidth = min(m_maxWidth, calcContentBoxWidth(style()->maxWidth().value()));
         m_minWidth = min(m_minWidth, calcContentBoxWidth(style()->maxWidth().value()));
     }

     int toAdd = paddingLeft() + paddingRight() + borderLeft() + borderRight();
     m_minWidth += toAdd;
     m_maxWidth += toAdd;

     setMinMaxKnown();
 }

 const int minSize = 4;
 const int minDefaultSize = 10;
 int RenderListBox::size() const
 {
     HTMLSelectElement* select = static_cast<HTMLSelectElement*>(node());
     int specifiedSize = select->size();
     if (specifiedSize > 1)
         return max(minSize, specifiedSize);

     return min(max(numItems(), minSize), minDefaultSize);
 }

 int RenderListBox::numItems() const
 {
     HTMLSelectElement* select = static_cast<HTMLSelectElement*>(node());
     return select->listItems().size();
 }

 void RenderListBox::calcHeight()
 {
     int toAdd = paddingTop() + paddingBottom() + borderTop() + borderBottom();

     int itemHeight = style()->font().height() + optionsSpacingMiddle;
     m_height = itemHeight * size() + toAdd;

     RenderBlock::calcHeight();

     if (m_vBar) {
         m_vBar->setEnabled(size() < numItems());
         m_vBar->setSteps(itemHeight, itemHeight);
         m_vBar->setProportion(m_height - toAdd, itemHeight * numItems());
     }
 }

 const int baselineAdjustment = 7;
 short RenderListBox::baselinePosition(bool b, bool isRootLineBox) const
 {
     // FIXME: This hardcoded baselineAdjustment is what we used to do for the old widget, but I'm not sure this is right for the new control.
     return height() + marginTop() + marginBottom() - baselineAdjustment;
 }

 IntRect RenderListBox::itemBoundingBoxRect(int tx, int ty, int index)
 {
     return IntRect (tx + borderLeft() + paddingLeft(),
                    ty + borderTop() + paddingTop() + ((style()->font().height() + optionsSpacingMiddle) * (index - m_indexOffset)),
                    absoluteBoundingBoxRect().width() - borderLeft() - borderRight() - paddingLeft() - paddingRight(),
                    style()->font().height() + optionsSpacingMiddle);
 }

 void RenderListBox::paintObject(PaintInfo& paintInfo, int tx, int ty)
 {
     // Push a clip.
     IntRect clipRect(tx + borderLeft(), ty + borderTop(),
          width() - borderLeft() - borderRight(), height() - borderBottom() - borderTop());
     if (paintInfo.phase == PaintPhaseForeground || paintInfo.phase == PaintPhaseChildBlockBackgrounds) {
         if (clipRect.width() == 0 || clipRect.height() == 0)
             return;
         paintInfo.context->save();
         paintInfo.context->clip(clipRect);
     }

     HTMLSelectElement* select = static_cast<HTMLSelectElement*>(node());
     int listItemsSize = select->listItems().size();

     if (paintInfo.phase == PaintPhaseForeground) {
         int index = m_indexOffset;
         while (index < listItemsSize && index < m_indexOffset + size()) {
             paintItemForeground(paintInfo, tx, ty, index);
             index++;
         }
     }

     // Paint the children.
     RenderBlock::paintObject(paintInfo, tx, ty);

     if (paintInfo.phase == PaintPhaseBlockBackground) {
         int index = m_indexOffset;
         while (index < listItemsSize && index < m_indexOffset + size()) {
             paintItemBackground(paintInfo, tx, ty, index);
             index++;
         }
         paintScrollbar(paintInfo);
     }
     // Pop the clip.
     if (paintInfo.phase == PaintPhaseForeground || paintInfo.phase == PaintPhaseChildBlockBackgrounds)
         paintInfo.context->restore();
 }

 void RenderListBox::paintScrollbar(PaintInfo& paintInfo)
 {
     if (m_vBar) {
         IntRect absBounds = absoluteBoundingBoxRect();
         IntRect scrollRect(absBounds.right() - borderRight() - m_vBar->width(),
                            absBounds.y() + borderTop(),
                            m_vBar->width(),
                            absBounds.height() - (borderTop() + borderBottom()));
         m_vBar->setRect(scrollRect);
         m_vBar->paint(paintInfo.context, scrollRect);
     }
 }

 void RenderListBox::paintItemForeground(PaintInfo& paintInfo, int tx, int ty, int listIndex)
 {
     HTMLSelectElement* select = static_cast<HTMLSelectElement*>(node());
     const Vector<HTMLElement*>& listItems = select->listItems();
     HTMLElement* element = listItems[listIndex];

     String itemText;
     if (element->hasTagName(optionTag))
         itemText = static_cast<HTMLOptionElement*>(element)->optionText();
     else if (element->hasTagName(optgroupTag))
         itemText = static_cast<HTMLOptGroupElement*>(element)->groupLabelText();

     TextRun textRun(itemText.characters(), itemText.length());

     // Determine where the item text should be placed
     IntRect r = itemBoundingBoxRect(tx, ty, listIndex);
     r.move(optionsSpacingLeft, style()->font().ascent());

     RenderStyle* itemStyle = element->renderStyle();
     if (!itemStyle)
         itemStyle = style();

     Color textColor = element->renderStyle() ? element->renderStyle()->color() : style()->color();
     if (element->hasTagName(optionTag) && static_cast<HTMLOptionElement*>(element)->selected()) {
         if (document()->frame()->isActive() && document()->focusedNode() == node())
             textColor = theme()->activeListBoxSelectionForegroundColor();
         // Honor the foreground color for disabled items
         else if (!element->disabled())
             textColor = theme()->inactiveListBoxSelectionForegroundColor();
     }

     paintInfo.context->setFillColor(textColor);

     Font itemFont = style()->font();
     if (element->hasTagName(optgroupTag)) {
         FontDescription d = itemFont.fontDescription();
         d.setBold(true);
         itemFont = Font(d, itemFont.letterSpacing(), itemFont.wordSpacing());
         itemFont.update();
     }
     paintInfo.context->setFont(itemFont);

     // Draw the item text
     if (itemStyle->visibility() != HIDDEN)
         paintInfo.context->drawText(textRun, r.location());
 }

 void RenderListBox::paintItemBackground(PaintInfo& paintInfo, int tx, int ty, int listIndex)
 {
     HTMLSelectElement* select = static_cast<HTMLSelectElement*>(node());
     const Vector<HTMLElement*>& listItems = select->listItems();
     HTMLElement* element = listItems[listIndex];

     Color backColor;
     if (element->hasTagName(optionTag) && static_cast<HTMLOptionElement*>(element)->selected()) {
         if (document()->frame()->isActive() && document()->focusedNode() == node())
             backColor = theme()->activeListBoxSelectionBackgroundColor();
         else
             backColor = theme()->inactiveListBoxSelectionBackgroundColor();
     } else
         backColor = element->renderStyle() ? element->renderStyle()->backgroundColor() : style()->backgroundColor();

     // Draw the background for this list box item
     if (!element->renderStyle() || element->renderStyle()->visibility() != HIDDEN)
         paintInfo.context->fillRect(itemBoundingBoxRect(tx, ty, listIndex), backColor);
 }

 bool RenderListBox::isPointInScrollbar(HitTestResult& result, int _x, int _y, int _tx, int _ty)
 {
     if (!m_vBar)
         return false;

     IntRect vertRect(_tx + width() - borderRight() - m_vBar->width(),
                    _ty + borderTop() - borderTopExtra(),
                    m_vBar->width(),
                    height() + borderTopExtra() + borderBottomExtra() - borderTop() - borderBottom());

     if (vertRect.contains(_x, _y)) {
         result.setScrollbar(m_vBar->isWidget() ? static_cast<PlatformScrollbar*>(m_vBar) : 0);
         return true;
     }
     return false;
 }

 int RenderListBox::listIndexAtOffset(int offsetX, int offsetY)
 {
     HTMLSelectElement* select = static_cast<HTMLSelectElement*>(node());
     const Vector<HTMLElement*>& listItems = select->listItems();

     if ((int)listItems.size() > 0) {
         int newOffset = max(0, offsetY / (style()->font().height() + optionsSpacingMiddle)) + m_indexOffset;
         newOffset = max(0, min((int)listItems.size() - 1, newOffset));
         int scrollbarWidth = m_vBar ? m_vBar->width() : 0;
         if (offsetX >= borderLeft() + paddingLeft() && offsetX < absoluteBoundingBoxRect().width() - borderRight() - paddingRight() - scrollbarWidth)
             return newOffset;
     }

     return -1;
 }

 void RenderListBox::autoscroll()
 {
     IntPoint pos = document()->frame()->view()->windowToContents(document()->frame()->eventHandler()->currentMousePosition());

     int rx = 0;
     int ry = 0;
     absolutePosition(rx, ry);
     int offsetX = pos.x() - rx;
     int offsetY = pos.y() - ry;

     int endIndex = -1;
     int rows = size();
     int offset = m_indexOffset;
     if (offsetY <  0 && scrollToRevealElementAtListIndex(offset - 1))
         endIndex = offset - 1;
     else if (offsetY > absoluteBoundingBoxRect().height() && scrollToRevealElementAtListIndex(offset + rows))
         endIndex = offset + rows - 1;
     else
         endIndex = listIndexAtOffset(offsetX, offsetY);

     HTMLSelectElement* select = static_cast<HTMLSelectElement*>(node());
     if (endIndex >= 0 && select) {
         if (!select->multiple())
             select->setActiveSelectionAnchorIndex(endIndex);
         select->setActiveSelectionEndIndex(endIndex);
         select->updateListBoxSelection(!select->multiple());
         repaint();
     }
 }

 void RenderListBox::stopAutoscroll()
 {
     if ( HTMLSelectElement* select = static_cast<HTMLSelectElement*>(node()))
         select->listBoxOnChange();
 }

 bool RenderListBox::scrollToRevealElementAtListIndex(int index)
 {
     HTMLSelectElement* select = static_cast<HTMLSelectElement*>(node());
     const Vector<HTMLElement*>& listItems = select->listItems();

     if (index < 0 || index > (int)listItems.size() - 1 || listIndexIsVisible(index))
         return false;

     int newOffset;
     if (index < m_indexOffset)
         newOffset = index;
     else
         newOffset = index - size() + 1;

     if (m_vBar) {
         IntRect rect = absoluteBoundingBoxRect();
         m_vBar->setValue(itemBoundingBoxRect(rect.x(), rect.y(), newOffset + m_indexOffset).y() - rect.y());
     }
     m_indexOffset = newOffset;

     return true;
 }

 bool RenderListBox::listIndexIsVisible(int index)
 {
     return index >= m_indexOffset && index < m_indexOffset + size();
 }

 bool RenderListBox::scroll(ScrollDirection direction, ScrollGranularity granularity, float multiplier)
 {
     return m_vBar && m_vBar->scroll(direction, granularity, multiplier);
 }

 void RenderListBox::valueChanged(unsigned listIndex)
 {
     HTMLSelectElement* select = static_cast<HTMLSelectElement*>(node());
     select->setSelectedIndex(select->listToOptionIndex(listIndex));
     select->onChange();
 }

 void RenderListBox::valueChanged(Scrollbar*)
 {
     if (m_vBar) {
         int newOffset = max(0, m_vBar->value() / (style()->font().height() + optionsSpacingMiddle));
         if (newOffset != m_indexOffset) {
             m_indexOffset = newOffset;
             repaint();
             // Fire the scroll DOM event.
             EventTargetNodeCast(node())->dispatchHTMLEvent(scrollEvent, true, false);
         }
     }
 }

 IntRect RenderListBox::windowClipRect() const
 {
     return view()->frameView()->windowClipRectForLayer(enclosingLayer(), true);
 }

 } // namespace WebCore
	/**
	* This file is part of the select element renderer in WebCore.
	*
	* Copyright (C) 2006 Apple Computer, Inc.
	*
	* 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., 59 Temple Place - Suite 330,
	* Boston, MA 02111-1307, USA.
	*
	*/

	#include "config.h"
	#include "RenderListBox.h"

	#include "Document.h"
	#include "EventHandler.h"
	#include "EventNames.h"
	#include "Frame.h"
	#include "FrameView.h"
	#include "GraphicsContext.h"
	#include "HTMLNames.h"
	#include "HTMLOptGroupElement.h"
	#include "HTMLOptionElement.h"
	#include "HTMLSelectElement.h"
	#include "HitTestResult.h"
	#include "PlatformScrollBar.h"
	#include "RenderBR.h"
	#include "RenderText.h"
	#include "RenderTheme.h"
	#include "RenderView.h"
	#include "TextStyle.h"
	#include <math.h>

	using namespace std;

	namespace WebCore {

	using namespace HTMLNames;
	using namespace EventNames;

	const int optionsSpacingMiddle = 1;
	const int optionsSpacingLeft = 2;

	RenderListBox::RenderListBox(HTMLSelectElement* element)
	: RenderBlock(element)
	, m_optionsChanged(true)
	, m_optionsWidth(0)
	, m_indexOffset(0)
	, m_selectionChanged(true)
	, m_vBar(0)
	{
	}

	RenderListBox::~RenderListBox()
	{
	if (m_vBar && m_vBar->isWidget()) {
	element()->document()->view()->removeChild(static_cast<PlatformScrollbar*>(m_vBar));
	m_vBar->deref();
	}
	}


	void RenderListBox::setStyle(RenderStyle* style)
	{
	RenderBlock::setStyle(style);
	setReplaced(isInline());
	}

	void RenderListBox::updateFromElement()
	{
	HTMLSelectElement* select = static_cast<HTMLSelectElement*>(node());

	if (m_optionsChanged) {
	const Vector<HTMLElement*>& listItems = select->listItems();
	int size = listItems.size();

	float width = 0;
	TextStyle textStyle(0, 0, 0, false, false, false, false);
	for (int i = 0; i < size; ++i) {
	HTMLElement* element = listItems[i];
	String text;
	Font itemFont = style()->font();
	if (element->hasTagName(optionTag))
	text = static_cast<HTMLOptionElement*>(element)->optionText();
	else if (element->hasTagName(optgroupTag)) {
	text = static_cast<HTMLOptGroupElement*>(element)->groupLabelText();
	FontDescription d = itemFont.fontDescription();
	d.setBold(true);
	itemFont = Font(d, itemFont.letterSpacing(), itemFont.wordSpacing());
	itemFont.update();
	}

	if (!text.isEmpty()) {
	float textWidth = itemFont.floatWidth(TextRun(text.impl()), textStyle);
	width = max(width, textWidth);
	}
	}
	m_optionsWidth = static_cast<int>(ceilf(width));
	m_optionsChanged = false;
	setNeedsLayoutAndMinMaxRecalc();
	}

	int firstIndex = select->optionToListIndex(select->selectedIndex());
	int lastIndex = select->lastSelectedListIndex();
	if (firstIndex >= 0 && !listIndexIsVisible(firstIndex) && !listIndexIsVisible(lastIndex))
	scrollToRevealElementAtListIndex(firstIndex);
	}

	void RenderListBox::calcMinMaxWidth()
	{
	if (!m_vBar) {
	if (Scrollbar::hasPlatformScrollbars()) {
	PlatformScrollbar* widget = new PlatformScrollbar(this, VerticalScrollbar, SmallScrollbar);
	widget->ref();
	node()->document()->view()->addChild(widget);
	m_vBar = widget;
	}
	}
	if (m_optionsChanged)
	updateFromElement();

	m_minWidth = 0;
	m_maxWidth = 0;

	if (style()->width().isFixed() && style()->width().value() > 0)
	m_minWidth = m_maxWidth = calcContentBoxWidth(style()->width().value());
	else {
	m_maxWidth = m_optionsWidth;
	if (m_vBar)
	m_maxWidth += m_vBar->width();
	}

	if (style()->minWidth().isFixed() && style()->minWidth().value() > 0) {
	m_maxWidth = max(m_maxWidth, calcContentBoxWidth(style()->minWidth().value()));
	m_minWidth = max(m_minWidth, calcContentBoxWidth(style()->minWidth().value()));
	} else if (style()->width().isPercent() \|\| (style()->width().isAuto() && style()->height().isPercent()))
	m_minWidth = 0;
	else
	m_minWidth = m_maxWidth;

	if (style()->maxWidth().isFixed() && style()->maxWidth().value() != undefinedLength) {
	m_maxWidth = min(m_maxWidth, calcContentBoxWidth(style()->maxWidth().value()));
	m_minWidth = min(m_minWidth, calcContentBoxWidth(style()->maxWidth().value()));
	}

	int toAdd = paddingLeft() + paddingRight() + borderLeft() + borderRight();
	m_minWidth += toAdd;
	m_maxWidth += toAdd;

	setMinMaxKnown();
	}

	const int minSize = 4;
	const int minDefaultSize = 10;
	int RenderListBox::size() const
	{
	HTMLSelectElement* select = static_cast<HTMLSelectElement*>(node());
	int specifiedSize = select->size();
	if (specifiedSize > 1)
	return max(minSize, specifiedSize);

	return min(max(numItems(), minSize), minDefaultSize);
	}

	int RenderListBox::numItems() const
	{
	HTMLSelectElement* select = static_cast<HTMLSelectElement*>(node());
	return select->listItems().size();
	}

	void RenderListBox::calcHeight()
	{
	int toAdd = paddingTop() + paddingBottom() + borderTop() + borderBottom();

	int itemHeight = style()->font().height() + optionsSpacingMiddle;
	m_height = itemHeight * size() + toAdd;

	RenderBlock::calcHeight();

	if (m_vBar) {
	m_vBar->setEnabled(size() < numItems());
	m_vBar->setSteps(itemHeight, itemHeight);
	m_vBar->setProportion(m_height - toAdd, itemHeight * numItems());
	}
	}

	const int baselineAdjustment = 7;
	short RenderListBox::baselinePosition(bool b, bool isRootLineBox) const
	{
	// FIXME: This hardcoded baselineAdjustment is what we used to do for the old widget, but I'm not sure this is right for the new control.
	return height() + marginTop() + marginBottom() - baselineAdjustment;
	}

	IntRect RenderListBox::itemBoundingBoxRect(int tx, int ty, int index)
	{
	return IntRect (tx + borderLeft() + paddingLeft(),
	ty + borderTop() + paddingTop() + ((style()->font().height() + optionsSpacingMiddle) * (index - m_indexOffset)),
	absoluteBoundingBoxRect().width() - borderLeft() - borderRight() - paddingLeft() - paddingRight(),
	style()->font().height() + optionsSpacingMiddle);
	}

	void RenderListBox::paintObject(PaintInfo& paintInfo, int tx, int ty)
	{
	// Push a clip.
	IntRect clipRect(tx + borderLeft(), ty + borderTop(),
	width() - borderLeft() - borderRight(), height() - borderBottom() - borderTop());
	if (paintInfo.phase == PaintPhaseForeground \|\| paintInfo.phase == PaintPhaseChildBlockBackgrounds) {
	if (clipRect.width() == 0 \|\| clipRect.height() == 0)
	return;
	paintInfo.context->save();
	paintInfo.context->clip(clipRect);
	}

	HTMLSelectElement* select = static_cast<HTMLSelectElement*>(node());
	int listItemsSize = select->listItems().size();

	if (paintInfo.phase == PaintPhaseForeground) {
	int index = m_indexOffset;
	while (index < listItemsSize && index < m_indexOffset + size()) {
	paintItemForeground(paintInfo, tx, ty, index);
	index++;
	}
	}

	// Paint the children.
	RenderBlock::paintObject(paintInfo, tx, ty);

	if (paintInfo.phase == PaintPhaseBlockBackground) {
	int index = m_indexOffset;
	while (index < listItemsSize && index < m_indexOffset + size()) {
	paintItemBackground(paintInfo, tx, ty, index);
	index++;
	}
	paintScrollbar(paintInfo);
	}
	// Pop the clip.
	if (paintInfo.phase == PaintPhaseForeground \|\| paintInfo.phase == PaintPhaseChildBlockBackgrounds)
	paintInfo.context->restore();
	}

	void RenderListBox::paintScrollbar(PaintInfo& paintInfo)
	{
	if (m_vBar) {
	IntRect absBounds = absoluteBoundingBoxRect();
	IntRect scrollRect(absBounds.right() - borderRight() - m_vBar->width(),
	absBounds.y() + borderTop(),
	m_vBar->width(),
	absBounds.height() - (borderTop() + borderBottom()));
	m_vBar->setRect(scrollRect);
	m_vBar->paint(paintInfo.context, scrollRect);
	}
	}

	void RenderListBox::paintItemForeground(PaintInfo& paintInfo, int tx, int ty, int listIndex)
	{
	HTMLSelectElement* select = static_cast<HTMLSelectElement*>(node());
	const Vector<HTMLElement*>& listItems = select->listItems();
	HTMLElement* element = listItems[listIndex];

	String itemText;
	if (element->hasTagName(optionTag))
	itemText = static_cast<HTMLOptionElement*>(element)->optionText();
	else if (element->hasTagName(optgroupTag))
	itemText = static_cast<HTMLOptGroupElement*>(element)->groupLabelText();

	TextRun textRun(itemText.characters(), itemText.length());

	// Determine where the item text should be placed
	IntRect r = itemBoundingBoxRect(tx, ty, listIndex);
	r.move(optionsSpacingLeft, style()->font().ascent());

	RenderStyle* itemStyle = element->renderStyle();
	if (!itemStyle)
	itemStyle = style();

	Color textColor = element->renderStyle() ? element->renderStyle()->color() : style()->color();
	if (element->hasTagName(optionTag) && static_cast<HTMLOptionElement*>(element)->selected()) {
	if (document()->frame()->isActive() && document()->focusedNode() == node())
	textColor = theme()->activeListBoxSelectionForegroundColor();
	// Honor the foreground color for disabled items
	else if (!element->disabled())
	textColor = theme()->inactiveListBoxSelectionForegroundColor();
	}

	paintInfo.context->setFillColor(textColor);

	Font itemFont = style()->font();
	if (element->hasTagName(optgroupTag)) {
	FontDescription d = itemFont.fontDescription();
	d.setBold(true);
	itemFont = Font(d, itemFont.letterSpacing(), itemFont.wordSpacing());
	itemFont.update();
	}
	paintInfo.context->setFont(itemFont);

	// Draw the item text
	if (itemStyle->visibility() != HIDDEN)
	paintInfo.context->drawText(textRun, r.location());
	}

	void RenderListBox::paintItemBackground(PaintInfo& paintInfo, int tx, int ty, int listIndex)
	{
	HTMLSelectElement* select = static_cast<HTMLSelectElement*>(node());
	const Vector<HTMLElement*>& listItems = select->listItems();
	HTMLElement* element = listItems[listIndex];

	Color backColor;
	if (element->hasTagName(optionTag) && static_cast<HTMLOptionElement*>(element)->selected()) {
	if (document()->frame()->isActive() && document()->focusedNode() == node())
	backColor = theme()->activeListBoxSelectionBackgroundColor();
	else
	backColor = theme()->inactiveListBoxSelectionBackgroundColor();
	} else
	backColor = element->renderStyle() ? element->renderStyle()->backgroundColor() : style()->backgroundColor();

	// Draw the background for this list box item
	if (!element->renderStyle() \|\| element->renderStyle()->visibility() != HIDDEN)
	paintInfo.context->fillRect(itemBoundingBoxRect(tx, ty, listIndex), backColor);
	}

	bool RenderListBox::isPointInScrollbar(HitTestResult& result, int _x, int _y, int _tx, int _ty)
	{
	if (!m_vBar)
	return false;

	IntRect vertRect(_tx + width() - borderRight() - m_vBar->width(),
	_ty + borderTop() - borderTopExtra(),
	m_vBar->width(),
	height() + borderTopExtra() + borderBottomExtra() - borderTop() - borderBottom());

	if (vertRect.contains(_x, _y)) {
	result.setScrollbar(m_vBar->isWidget() ? static_cast<PlatformScrollbar*>(m_vBar) : 0);
	return true;
	}
	return false;
	}

	int RenderListBox::listIndexAtOffset(int offsetX, int offsetY)
	{
	HTMLSelectElement* select = static_cast<HTMLSelectElement*>(node());
	const Vector<HTMLElement*>& listItems = select->listItems();

	if ((int)listItems.size() > 0) {
	int newOffset = max(0, offsetY / (style()->font().height() + optionsSpacingMiddle)) + m_indexOffset;
	newOffset = max(0, min((int)listItems.size() - 1, newOffset));
	int scrollbarWidth = m_vBar ? m_vBar->width() : 0;
	if (offsetX >= borderLeft() + paddingLeft() && offsetX < absoluteBoundingBoxRect().width() - borderRight() - paddingRight() - scrollbarWidth)
	return newOffset;
	}

	return -1;
	}

	void RenderListBox::autoscroll()
	{
	IntPoint pos = document()->frame()->view()->windowToContents(document()->frame()->eventHandler()->currentMousePosition());

	int rx = 0;
	int ry = 0;
	absolutePosition(rx, ry);
	int offsetX = pos.x() - rx;
	int offsetY = pos.y() - ry;

	int endIndex = -1;
	int rows = size();
	int offset = m_indexOffset;
	if (offsetY < 0 && scrollToRevealElementAtListIndex(offset - 1))
	endIndex = offset - 1;
	else if (offsetY > absoluteBoundingBoxRect().height() && scrollToRevealElementAtListIndex(offset + rows))
	endIndex = offset + rows - 1;
	else
	endIndex = listIndexAtOffset(offsetX, offsetY);

	HTMLSelectElement* select = static_cast<HTMLSelectElement*>(node());
	if (endIndex >= 0 && select) {
	if (!select->multiple())
	select->setActiveSelectionAnchorIndex(endIndex);
	select->setActiveSelectionEndIndex(endIndex);
	select->updateListBoxSelection(!select->multiple());
	repaint();
	}
	}

	void RenderListBox::stopAutoscroll()
	{
	if ( HTMLSelectElement* select = static_cast<HTMLSelectElement*>(node()))
	select->listBoxOnChange();
	}

	bool RenderListBox::scrollToRevealElementAtListIndex(int index)
	{
	HTMLSelectElement* select = static_cast<HTMLSelectElement*>(node());
	const Vector<HTMLElement*>& listItems = select->listItems();

	if (index < 0 \|\| index > (int)listItems.size() - 1 \|\| listIndexIsVisible(index))
	return false;

	int newOffset;
	if (index < m_indexOffset)
	newOffset = index;
	else
	newOffset = index - size() + 1;

	if (m_vBar) {
	IntRect rect = absoluteBoundingBoxRect();
	m_vBar->setValue(itemBoundingBoxRect(rect.x(), rect.y(), newOffset + m_indexOffset).y() - rect.y());
	}
	m_indexOffset = newOffset;

	return true;
	}

	bool RenderListBox::listIndexIsVisible(int index)
	{
	return index >= m_indexOffset && index < m_indexOffset + size();
	}

	bool RenderListBox::scroll(ScrollDirection direction, ScrollGranularity granularity, float multiplier)
	{
	return m_vBar && m_vBar->scroll(direction, granularity, multiplier);
	}

	void RenderListBox::valueChanged(unsigned listIndex)
	{
	HTMLSelectElement* select = static_cast<HTMLSelectElement*>(node());
	select->setSelectedIndex(select->listToOptionIndex(listIndex));
	select->onChange();
	}

	void RenderListBox::valueChanged(Scrollbar*)
	{
	if (m_vBar) {
	int newOffset = max(0, m_vBar->value() / (style()->font().height() + optionsSpacingMiddle));
	if (newOffset != m_indexOffset) {
	m_indexOffset = newOffset;
	repaint();
	// Fire the scroll DOM event.
	EventTargetNodeCast(node())->dispatchHTMLEvent(scrollEvent, true, false);
	}
	}
	}

	IntRect RenderListBox::windowClipRect() const
	{
	return view()->frameView()->windowClipRectForLayer(enclosingLayer(), true);
	}

	} // namespace WebCore