Source/core/rendering/RenderTextControlSingleLine.cpp - platform/external/chromium_org/third_party/WebKit - Git at Google

 /**
  * Copyright (C) 2006, 2007, 2010 Apple Inc. All rights reserved.
  *           (C) 2008 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2010 Google Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
  *
  * 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.
  *
  */

 #include "config.h"
 #include "core/rendering/RenderTextControlSingleLine.h"

 #include "CSSValueKeywords.h"
 #include "core/dom/shadow/ShadowRoot.h"
 #include "core/editing/FrameSelection.h"
 #include "core/html/shadow/ShadowElementNames.h"
 #include "core/frame/Frame.h"
 #include "core/platform/graphics/SimpleFontData.h"
 #include "core/rendering/HitTestResult.h"
 #include "core/rendering/LayoutRectRecorder.h"
 #include "core/rendering/RenderLayer.h"
 #include "core/rendering/RenderTheme.h"
 #include "platform/PlatformKeyboardEvent.h"

 using namespace std;

 namespace WebCore {

 using namespace HTMLNames;

 RenderTextControlSingleLine::RenderTextControlSingleLine(HTMLInputElement* element)
     : RenderTextControl(element)
     , m_shouldDrawCapsLockIndicator(false)
     , m_desiredInnerTextLogicalHeight(-1)
 {
     ASSERT(element->hasTagName(inputTag));
 }

 RenderTextControlSingleLine::~RenderTextControlSingleLine()
 {
 }

 inline Element* RenderTextControlSingleLine::containerElement() const
 {
     return inputElement()->userAgentShadowRoot()->getElementById(ShadowElementNames::textFieldContainer());
 }

 inline Element* RenderTextControlSingleLine::editingViewPortElement() const
 {
     return inputElement()->userAgentShadowRoot()->getElementById(ShadowElementNames::editingViewPort());
 }

 inline HTMLElement* RenderTextControlSingleLine::innerSpinButtonElement() const
 {
     return toHTMLElement(inputElement()->userAgentShadowRoot()->getElementById(ShadowElementNames::spinButton()));
 }

 void RenderTextControlSingleLine::paint(PaintInfo& paintInfo, const LayoutPoint& paintOffset)
 {
     RenderTextControl::paint(paintInfo, paintOffset);

     if (paintInfo.phase == PaintPhaseBlockBackground && m_shouldDrawCapsLockIndicator) {
         LayoutRect contentsRect = contentBoxRect();

         // Center in the block progression direction.
         if (isHorizontalWritingMode())
             contentsRect.setY((height() - contentsRect.height()) / 2);
         else
             contentsRect.setX((width() - contentsRect.width()) / 2);

         // Convert the rect into the coords used for painting the content
         contentsRect.moveBy(paintOffset + location());
         RenderTheme::theme().paintCapsLockIndicator(this, paintInfo, pixelSnappedIntRect(contentsRect));
     }
 }

 LayoutUnit RenderTextControlSingleLine::computeLogicalHeightLimit() const
 {
     return containerElement() ? contentLogicalHeight() : logicalHeight();
 }

 void RenderTextControlSingleLine::layout()
 {
     LayoutRectRecorder recorder(*this);
     SubtreeLayoutScope layoutScope(this);

     // FIXME: We should remove the height-related hacks in layout() and
     // styleDidChange(). We need them because
     // - Center the inner elements vertically if the input height is taller than
     //   the intrinsic height of the inner elements.
     // - Shrink the inner elment heights if the input height is samller than the
     //   intrinsic heights of the inner elements.

     // We don't honor paddings and borders for textfields without decorations
     // and type=search if the text height is taller than the contentHeight()
     // because of compability.

     RenderBox* innerTextRenderer = innerTextElement()->renderBox();
     RenderBox* viewPortRenderer = editingViewPortElement() ? editingViewPortElement()->renderBox() : 0;

     // To ensure consistency between layouts, we need to reset any conditionally overriden height.
     if (innerTextRenderer && !innerTextRenderer->style()->logicalHeight().isAuto()) {
         innerTextRenderer->style()->setLogicalHeight(Length(Auto));
         layoutScope.setNeedsLayout(innerTextRenderer);
     }
     if (viewPortRenderer && !viewPortRenderer->style()->logicalHeight().isAuto()) {
         viewPortRenderer->style()->setLogicalHeight(Length(Auto));
         layoutScope.setNeedsLayout(viewPortRenderer);
     }

     RenderBlockFlow::layoutBlock(false);

     Element* container = containerElement();
     RenderBox* containerRenderer = container ? container->renderBox() : 0;

     // Set the text block height
     LayoutUnit desiredLogicalHeight = textBlockLogicalHeight();
     LayoutUnit logicalHeightLimit = computeLogicalHeightLimit();
     if (innerTextRenderer && innerTextRenderer->logicalHeight() > logicalHeightLimit) {
         if (desiredLogicalHeight != innerTextRenderer->logicalHeight())
             layoutScope.setNeedsLayout(this);

         m_desiredInnerTextLogicalHeight = desiredLogicalHeight;

         innerTextRenderer->style()->setLogicalHeight(Length(desiredLogicalHeight, Fixed));
         layoutScope.setNeedsLayout(innerTextRenderer);
         if (viewPortRenderer) {
             viewPortRenderer->style()->setLogicalHeight(Length(desiredLogicalHeight, Fixed));
             layoutScope.setNeedsLayout(viewPortRenderer);
         }
     }
     // The container might be taller because of decoration elements.
     if (containerRenderer) {
         containerRenderer->layoutIfNeeded();
         LayoutUnit containerLogicalHeight = containerRenderer->logicalHeight();
         if (containerLogicalHeight > logicalHeightLimit) {
             containerRenderer->style()->setLogicalHeight(Length(logicalHeightLimit, Fixed));
             layoutScope.setNeedsLayout(this);
         } else if (containerRenderer->logicalHeight() < contentLogicalHeight()) {
             containerRenderer->style()->setLogicalHeight(Length(contentLogicalHeight(), Fixed));
             layoutScope.setNeedsLayout(this);
         } else
             containerRenderer->style()->setLogicalHeight(Length(containerLogicalHeight, Fixed));
     }

     // If we need another layout pass, we have changed one of children's height so we need to relayout them.
     if (needsLayout())
         RenderBlockFlow::layoutBlock(true);

     // Center the child block in the block progression direction (vertical centering for horizontal text fields).
     if (!container && innerTextRenderer && innerTextRenderer->height() != contentLogicalHeight()) {
         LayoutUnit logicalHeightDiff = innerTextRenderer->logicalHeight() - contentLogicalHeight();
         innerTextRenderer->setLogicalTop(innerTextRenderer->logicalTop() - (logicalHeightDiff / 2 + layoutMod(logicalHeightDiff, 2)));
     } else
         centerContainerIfNeeded(containerRenderer);

     // Ignores the paddings for the inner spin button.
     if (RenderBox* innerSpinBox = innerSpinButtonElement() ? innerSpinButtonElement()->renderBox() : 0) {
         RenderBox* parentBox = innerSpinBox->parentBox();
         if (containerRenderer && !containerRenderer->style()->isLeftToRightDirection())
             innerSpinBox->setLogicalLocation(LayoutPoint(-paddingLogicalLeft(), -paddingBefore()));
         else
             innerSpinBox->setLogicalLocation(LayoutPoint(parentBox->logicalWidth() - innerSpinBox->logicalWidth() + paddingLogicalRight(), -paddingBefore()));
         innerSpinBox->setLogicalHeight(logicalHeight() - borderBefore() - borderAfter());
     }

     HTMLElement* placeholderElement = inputElement()->placeholderElement();
     if (RenderBox* placeholderBox = placeholderElement ? placeholderElement->renderBox() : 0) {
         LayoutSize innerTextSize;
         if (innerTextRenderer)
             innerTextSize = innerTextRenderer->size();
         placeholderBox->style()->setWidth(Length(innerTextSize.width() - placeholderBox->borderAndPaddingWidth(), Fixed));
         placeholderBox->style()->setHeight(Length(innerTextSize.height() - placeholderBox->borderAndPaddingHeight(), Fixed));
         bool neededLayout = placeholderBox->needsLayout();
         bool placeholderBoxHadLayout = placeholderBox->everHadLayout();
         placeholderBox->layoutIfNeeded();
         LayoutPoint textOffset;
         if (innerTextRenderer)
             textOffset = innerTextRenderer->location();
         if (editingViewPortElement() && editingViewPortElement()->renderBox())
             textOffset += toLayoutSize(editingViewPortElement()->renderBox()->location());
         if (containerRenderer)
             textOffset += toLayoutSize(containerRenderer->location());
         placeholderBox->setLocation(textOffset);

         if (!placeholderBoxHadLayout && placeholderBox->checkForRepaintDuringLayout()) {
             // This assumes a shadow tree without floats. If floats are added, the
             // logic should be shared with RenderBlock::layoutBlockChild.
             placeholderBox->repaint();
         }
         // The placeholder gets layout last, after the parent text control and its other children,
         // so in order to get the correct overflow from the placeholder we need to recompute it now.
         if (neededLayout)
             computeOverflow(clientLogicalBottom());
     }
 }

 bool RenderTextControlSingleLine::nodeAtPoint(const HitTestRequest& request, HitTestResult& result, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction hitTestAction)
 {
     if (!RenderTextControl::nodeAtPoint(request, result, locationInContainer, accumulatedOffset, hitTestAction))
         return false;

     // Say that we hit the inner text element if
     //  - we hit a node inside the inner text element,
     //  - we hit the <input> element (e.g. we're over the border or padding), or
     //  - we hit regions not in any decoration buttons.
     Element* container = containerElement();
     if (result.innerNode()->isDescendantOf(innerTextElement()) || result.innerNode() == node() || (container && container == result.innerNode())) {
         LayoutPoint pointInParent = locationInContainer.point();
         if (container && editingViewPortElement()) {
             if (editingViewPortElement()->renderBox())
                 pointInParent -= toLayoutSize(editingViewPortElement()->renderBox()->location());
             if (container->renderBox())
                 pointInParent -= toLayoutSize(container->renderBox()->location());
         }
         hitInnerTextElement(result, pointInParent, accumulatedOffset);
     }
     return true;
 }

 void RenderTextControlSingleLine::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
 {
     m_desiredInnerTextLogicalHeight = -1;
     RenderTextControl::styleDidChange(diff, oldStyle);

     // We may have set the width and the height in the old style in layout().
     // Reset them now to avoid getting a spurious layout hint.
     Element* viewPort = editingViewPortElement();
     if (RenderObject* viewPortRenderer = viewPort ? viewPort->renderer() : 0) {
         viewPortRenderer->style()->setHeight(Length());
         viewPortRenderer->style()->setWidth(Length());
     }
     Element* container = containerElement();
     if (RenderObject* containerRenderer = container ? container->renderer() : 0) {
         containerRenderer->style()->setHeight(Length());
         containerRenderer->style()->setWidth(Length());
     }
     RenderObject* innerTextRenderer = innerTextElement()->renderer();
     if (innerTextRenderer && diff == StyleDifferenceLayout)
         innerTextRenderer->setNeedsLayout();
     if (HTMLElement* placeholder = inputElement()->placeholderElement())
         placeholder->setInlineStyleProperty(CSSPropertyTextOverflow, textShouldBeTruncated() ? CSSValueEllipsis : CSSValueClip);
     setHasOverflowClip(false);
 }

 void RenderTextControlSingleLine::capsLockStateMayHaveChanged()
 {
     if (!node())
         return;

     // Only draw the caps lock indicator if these things are true:
     // 1) The field is a password field
     // 2) The frame is active
     // 3) The element is focused
     // 4) The caps lock is on
     bool shouldDrawCapsLockIndicator = false;

     if (Frame* frame = document().frame())
         shouldDrawCapsLockIndicator = inputElement()->isPasswordField() && frame->selection().isFocusedAndActive() && document().focusedElement() == node() && PlatformKeyboardEvent::currentCapsLockState();

     if (shouldDrawCapsLockIndicator != m_shouldDrawCapsLockIndicator) {
         m_shouldDrawCapsLockIndicator = shouldDrawCapsLockIndicator;
         repaint();
     }
 }

 bool RenderTextControlSingleLine::hasControlClip() const
 {
     // Apply control clip for text fields with decorations.
     return !!containerElement();
 }

 LayoutRect RenderTextControlSingleLine::controlClipRect(const LayoutPoint& additionalOffset) const
 {
     ASSERT(hasControlClip());
     LayoutRect clipRect = contentBoxRect();
     if (containerElement()->renderBox())
         clipRect = unionRect(clipRect, containerElement()->renderBox()->frameRect());
     clipRect.moveBy(additionalOffset);
     return clipRect;
 }

 float RenderTextControlSingleLine::getAvgCharWidth(AtomicString family)
 {
     // Since Lucida Grande is the default font, we want this to match the width
     // of MS Shell Dlg, the default font for textareas in Firefox, Safari Win and
     // IE for some encodings (in IE, the default font is encoding specific).
     // 901 is the avgCharWidth value in the OS/2 table for MS Shell Dlg.
     if (family == "Lucida Grande")
         return scaleEmToUnits(901);

     return RenderTextControl::getAvgCharWidth(family);
 }

 LayoutUnit RenderTextControlSingleLine::preferredContentLogicalWidth(float charWidth) const
 {
     int factor;
     bool includesDecoration = inputElement()->sizeShouldIncludeDecoration(factor);
     if (factor <= 0)
         factor = 20;

     LayoutUnit result = LayoutUnit::fromFloatCeil(charWidth * factor);

     float maxCharWidth = 0.f;
     AtomicString family = style()->font().family().family();
     // Since Lucida Grande is the default font, we want this to match the width
     // of MS Shell Dlg, the default font for textareas in Firefox, Safari Win and
     // IE for some encodings (in IE, the default font is encoding specific).
     // 4027 is the (xMax - xMin) value in the "head" font table for MS Shell Dlg.
     if (family == "Lucida Grande")
         maxCharWidth = scaleEmToUnits(4027);
     else if (hasValidAvgCharWidth(family))
         maxCharWidth = roundf(style()->font().primaryFont()->maxCharWidth());

     // For text inputs, IE adds some extra width.
     if (maxCharWidth > 0.f)
         result += maxCharWidth - charWidth;

     if (includesDecoration) {
         HTMLElement* spinButton = innerSpinButtonElement();
         if (RenderBox* spinRenderer = spinButton ? spinButton->renderBox() : 0) {
             result += spinRenderer->borderAndPaddingLogicalWidth();
             // Since the width of spinRenderer is not calculated yet, spinRenderer->logicalWidth() returns 0.
             // So computedStyle()->logicalWidth() is used instead.
             result += spinButton->computedStyle()->logicalWidth().value();
         }
     }

     return result;
 }

 LayoutUnit RenderTextControlSingleLine::computeControlLogicalHeight(LayoutUnit lineHeight, LayoutUnit nonContentHeight) const
 {
     return lineHeight + nonContentHeight;
 }

 void RenderTextControlSingleLine::updateFromElement()
 {
     RenderTextControl::updateFromElement();
 }

 PassRefPtr<RenderStyle> RenderTextControlSingleLine::createInnerTextStyle(const RenderStyle* startStyle) const
 {
     RefPtr<RenderStyle> textBlockStyle = RenderStyle::create();
     textBlockStyle->inheritFrom(startStyle);
     adjustInnerTextStyle(textBlockStyle.get());

     textBlockStyle->setWhiteSpace(PRE);
     textBlockStyle->setOverflowWrap(NormalOverflowWrap);
     textBlockStyle->setOverflowX(OHIDDEN);
     textBlockStyle->setOverflowY(OHIDDEN);
     textBlockStyle->setTextOverflow(textShouldBeTruncated() ? TextOverflowEllipsis : TextOverflowClip);

     if (m_desiredInnerTextLogicalHeight >= 0)
         textBlockStyle->setLogicalHeight(Length(m_desiredInnerTextLogicalHeight, Fixed));
     // Do not allow line-height to be smaller than our default.
     if (textBlockStyle->fontMetrics().lineSpacing() > lineHeight(true, HorizontalLine, PositionOfInteriorLineBoxes))
         textBlockStyle->setLineHeight(RenderStyle::initialLineHeight());

     textBlockStyle->setDisplay(BLOCK);
     textBlockStyle->setUnique();

     return textBlockStyle.release();
 }

 bool RenderTextControlSingleLine::textShouldBeTruncated() const
 {
     return document().focusedElement() != node() && style()->textOverflow() == TextOverflowEllipsis;
 }

 void RenderTextControlSingleLine::autoscroll(const IntPoint& position)
 {
     RenderBox* renderer = innerTextElement()->renderBox();
     if (!renderer)
         return;

     renderer->autoscroll(position);
 }

 int RenderTextControlSingleLine::scrollWidth() const
 {
     if (innerTextElement())
         return innerTextElement()->scrollWidth();
     return RenderBlock::scrollWidth();
 }

 int RenderTextControlSingleLine::scrollHeight() const
 {
     if (innerTextElement())
         return innerTextElement()->scrollHeight();
     return RenderBlock::scrollHeight();
 }

 int RenderTextControlSingleLine::scrollLeft() const
 {
     if (innerTextElement())
         return innerTextElement()->scrollLeft();
     return RenderBlock::scrollLeft();
 }

 int RenderTextControlSingleLine::scrollTop() const
 {
     if (innerTextElement())
         return innerTextElement()->scrollTop();
     return RenderBlock::scrollTop();
 }

 void RenderTextControlSingleLine::setScrollLeft(int newLeft)
 {
     if (innerTextElement())
         innerTextElement()->setScrollLeft(newLeft);
 }

 void RenderTextControlSingleLine::setScrollTop(int newTop)
 {
     if (innerTextElement())
         innerTextElement()->setScrollTop(newTop);
 }

 HTMLInputElement* RenderTextControlSingleLine::inputElement() const
 {
     return toHTMLInputElement(node());
 }

 }
	/**
	* Copyright (C) 2006, 2007, 2010 Apple Inc. All rights reserved.
	* (C) 2008 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
	* Copyright (C) 2010 Google Inc. All rights reserved.
	* Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
	*
	* 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.
	*
	*/

	#include "config.h"
	#include "core/rendering/RenderTextControlSingleLine.h"

	#include "CSSValueKeywords.h"
	#include "core/dom/shadow/ShadowRoot.h"
	#include "core/editing/FrameSelection.h"
	#include "core/html/shadow/ShadowElementNames.h"
	#include "core/frame/Frame.h"
	#include "core/platform/graphics/SimpleFontData.h"
	#include "core/rendering/HitTestResult.h"
	#include "core/rendering/LayoutRectRecorder.h"
	#include "core/rendering/RenderLayer.h"
	#include "core/rendering/RenderTheme.h"
	#include "platform/PlatformKeyboardEvent.h"

	using namespace std;

	namespace WebCore {

	using namespace HTMLNames;

	RenderTextControlSingleLine::RenderTextControlSingleLine(HTMLInputElement* element)
	: RenderTextControl(element)
	, m_shouldDrawCapsLockIndicator(false)
	, m_desiredInnerTextLogicalHeight(-1)
	{
	ASSERT(element->hasTagName(inputTag));
	}

	RenderTextControlSingleLine::~RenderTextControlSingleLine()
	{
	}

	inline Element* RenderTextControlSingleLine::containerElement() const
	{
	return inputElement()->userAgentShadowRoot()->getElementById(ShadowElementNames::textFieldContainer());
	}

	inline Element* RenderTextControlSingleLine::editingViewPortElement() const
	{
	return inputElement()->userAgentShadowRoot()->getElementById(ShadowElementNames::editingViewPort());
	}

	inline HTMLElement* RenderTextControlSingleLine::innerSpinButtonElement() const
	{
	return toHTMLElement(inputElement()->userAgentShadowRoot()->getElementById(ShadowElementNames::spinButton()));
	}

	void RenderTextControlSingleLine::paint(PaintInfo& paintInfo, const LayoutPoint& paintOffset)
	{
	RenderTextControl::paint(paintInfo, paintOffset);

	if (paintInfo.phase == PaintPhaseBlockBackground && m_shouldDrawCapsLockIndicator) {
	LayoutRect contentsRect = contentBoxRect();

	// Center in the block progression direction.
	if (isHorizontalWritingMode())
	contentsRect.setY((height() - contentsRect.height()) / 2);
	else
	contentsRect.setX((width() - contentsRect.width()) / 2);

	// Convert the rect into the coords used for painting the content
	contentsRect.moveBy(paintOffset + location());
	RenderTheme::theme().paintCapsLockIndicator(this, paintInfo, pixelSnappedIntRect(contentsRect));
	}
	}

	LayoutUnit RenderTextControlSingleLine::computeLogicalHeightLimit() const
	{
	return containerElement() ? contentLogicalHeight() : logicalHeight();
	}

	void RenderTextControlSingleLine::layout()
	{
	LayoutRectRecorder recorder(*this);
	SubtreeLayoutScope layoutScope(this);

	// FIXME: We should remove the height-related hacks in layout() and
	// styleDidChange(). We need them because
	// - Center the inner elements vertically if the input height is taller than
	// the intrinsic height of the inner elements.
	// - Shrink the inner elment heights if the input height is samller than the
	// intrinsic heights of the inner elements.

	// We don't honor paddings and borders for textfields without decorations
	// and type=search if the text height is taller than the contentHeight()
	// because of compability.

	RenderBox* innerTextRenderer = innerTextElement()->renderBox();
	RenderBox* viewPortRenderer = editingViewPortElement() ? editingViewPortElement()->renderBox() : 0;

	// To ensure consistency between layouts, we need to reset any conditionally overriden height.
	if (innerTextRenderer && !innerTextRenderer->style()->logicalHeight().isAuto()) {
	innerTextRenderer->style()->setLogicalHeight(Length(Auto));
	layoutScope.setNeedsLayout(innerTextRenderer);
	}
	if (viewPortRenderer && !viewPortRenderer->style()->logicalHeight().isAuto()) {
	viewPortRenderer->style()->setLogicalHeight(Length(Auto));
	layoutScope.setNeedsLayout(viewPortRenderer);
	}

	RenderBlockFlow::layoutBlock(false);

	Element* container = containerElement();
	RenderBox* containerRenderer = container ? container->renderBox() : 0;

	// Set the text block height
	LayoutUnit desiredLogicalHeight = textBlockLogicalHeight();
	LayoutUnit logicalHeightLimit = computeLogicalHeightLimit();
	if (innerTextRenderer && innerTextRenderer->logicalHeight() > logicalHeightLimit) {
	if (desiredLogicalHeight != innerTextRenderer->logicalHeight())
	layoutScope.setNeedsLayout(this);

	m_desiredInnerTextLogicalHeight = desiredLogicalHeight;

	innerTextRenderer->style()->setLogicalHeight(Length(desiredLogicalHeight, Fixed));
	layoutScope.setNeedsLayout(innerTextRenderer);
	if (viewPortRenderer) {
	viewPortRenderer->style()->setLogicalHeight(Length(desiredLogicalHeight, Fixed));
	layoutScope.setNeedsLayout(viewPortRenderer);
	}
	}
	// The container might be taller because of decoration elements.
	if (containerRenderer) {
	containerRenderer->layoutIfNeeded();
	LayoutUnit containerLogicalHeight = containerRenderer->logicalHeight();
	if (containerLogicalHeight > logicalHeightLimit) {
	containerRenderer->style()->setLogicalHeight(Length(logicalHeightLimit, Fixed));
	layoutScope.setNeedsLayout(this);
	} else if (containerRenderer->logicalHeight() < contentLogicalHeight()) {
	containerRenderer->style()->setLogicalHeight(Length(contentLogicalHeight(), Fixed));
	layoutScope.setNeedsLayout(this);
	} else
	containerRenderer->style()->setLogicalHeight(Length(containerLogicalHeight, Fixed));
	}

	// If we need another layout pass, we have changed one of children's height so we need to relayout them.
	if (needsLayout())
	RenderBlockFlow::layoutBlock(true);

	// Center the child block in the block progression direction (vertical centering for horizontal text fields).
	if (!container && innerTextRenderer && innerTextRenderer->height() != contentLogicalHeight()) {
	LayoutUnit logicalHeightDiff = innerTextRenderer->logicalHeight() - contentLogicalHeight();
	innerTextRenderer->setLogicalTop(innerTextRenderer->logicalTop() - (logicalHeightDiff / 2 + layoutMod(logicalHeightDiff, 2)));
	} else
	centerContainerIfNeeded(containerRenderer);

	// Ignores the paddings for the inner spin button.
	if (RenderBox* innerSpinBox = innerSpinButtonElement() ? innerSpinButtonElement()->renderBox() : 0) {
	RenderBox* parentBox = innerSpinBox->parentBox();
	if (containerRenderer && !containerRenderer->style()->isLeftToRightDirection())
	innerSpinBox->setLogicalLocation(LayoutPoint(-paddingLogicalLeft(), -paddingBefore()));
	else
	innerSpinBox->setLogicalLocation(LayoutPoint(parentBox->logicalWidth() - innerSpinBox->logicalWidth() + paddingLogicalRight(), -paddingBefore()));
	innerSpinBox->setLogicalHeight(logicalHeight() - borderBefore() - borderAfter());
	}

	HTMLElement* placeholderElement = inputElement()->placeholderElement();
	if (RenderBox* placeholderBox = placeholderElement ? placeholderElement->renderBox() : 0) {
	LayoutSize innerTextSize;
	if (innerTextRenderer)
	innerTextSize = innerTextRenderer->size();
	placeholderBox->style()->setWidth(Length(innerTextSize.width() - placeholderBox->borderAndPaddingWidth(), Fixed));
	placeholderBox->style()->setHeight(Length(innerTextSize.height() - placeholderBox->borderAndPaddingHeight(), Fixed));
	bool neededLayout = placeholderBox->needsLayout();
	bool placeholderBoxHadLayout = placeholderBox->everHadLayout();
	placeholderBox->layoutIfNeeded();
	LayoutPoint textOffset;
	if (innerTextRenderer)
	textOffset = innerTextRenderer->location();
	if (editingViewPortElement() && editingViewPortElement()->renderBox())
	textOffset += toLayoutSize(editingViewPortElement()->renderBox()->location());
	if (containerRenderer)
	textOffset += toLayoutSize(containerRenderer->location());
	placeholderBox->setLocation(textOffset);

	if (!placeholderBoxHadLayout && placeholderBox->checkForRepaintDuringLayout()) {
	// This assumes a shadow tree without floats. If floats are added, the
	// logic should be shared with RenderBlock::layoutBlockChild.
	placeholderBox->repaint();
	}
	// The placeholder gets layout last, after the parent text control and its other children,
	// so in order to get the correct overflow from the placeholder we need to recompute it now.
	if (neededLayout)
	computeOverflow(clientLogicalBottom());
	}
	}

	bool RenderTextControlSingleLine::nodeAtPoint(const HitTestRequest& request, HitTestResult& result, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction hitTestAction)
	{
	if (!RenderTextControl::nodeAtPoint(request, result, locationInContainer, accumulatedOffset, hitTestAction))
	return false;

	// Say that we hit the inner text element if
	// - we hit a node inside the inner text element,
	// - we hit the <input> element (e.g. we're over the border or padding), or
	// - we hit regions not in any decoration buttons.
	Element* container = containerElement();
	if (result.innerNode()->isDescendantOf(innerTextElement()) \|\| result.innerNode() == node() \|\| (container && container == result.innerNode())) {
	LayoutPoint pointInParent = locationInContainer.point();
	if (container && editingViewPortElement()) {
	if (editingViewPortElement()->renderBox())
	pointInParent -= toLayoutSize(editingViewPortElement()->renderBox()->location());
	if (container->renderBox())
	pointInParent -= toLayoutSize(container->renderBox()->location());
	}
	hitInnerTextElement(result, pointInParent, accumulatedOffset);
	}
	return true;
	}

	void RenderTextControlSingleLine::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
	{
	m_desiredInnerTextLogicalHeight = -1;
	RenderTextControl::styleDidChange(diff, oldStyle);

	// We may have set the width and the height in the old style in layout().
	// Reset them now to avoid getting a spurious layout hint.
	Element* viewPort = editingViewPortElement();
	if (RenderObject* viewPortRenderer = viewPort ? viewPort->renderer() : 0) {
	viewPortRenderer->style()->setHeight(Length());
	viewPortRenderer->style()->setWidth(Length());
	}
	Element* container = containerElement();
	if (RenderObject* containerRenderer = container ? container->renderer() : 0) {
	containerRenderer->style()->setHeight(Length());
	containerRenderer->style()->setWidth(Length());
	}
	RenderObject* innerTextRenderer = innerTextElement()->renderer();
	if (innerTextRenderer && diff == StyleDifferenceLayout)
	innerTextRenderer->setNeedsLayout();
	if (HTMLElement* placeholder = inputElement()->placeholderElement())
	placeholder->setInlineStyleProperty(CSSPropertyTextOverflow, textShouldBeTruncated() ? CSSValueEllipsis : CSSValueClip);
	setHasOverflowClip(false);
	}

	void RenderTextControlSingleLine::capsLockStateMayHaveChanged()
	{
	if (!node())
	return;

	// Only draw the caps lock indicator if these things are true:
	// 1) The field is a password field
	// 2) The frame is active
	// 3) The element is focused
	// 4) The caps lock is on
	bool shouldDrawCapsLockIndicator = false;

	if (Frame* frame = document().frame())
	shouldDrawCapsLockIndicator = inputElement()->isPasswordField() && frame->selection().isFocusedAndActive() && document().focusedElement() == node() && PlatformKeyboardEvent::currentCapsLockState();

	if (shouldDrawCapsLockIndicator != m_shouldDrawCapsLockIndicator) {
	m_shouldDrawCapsLockIndicator = shouldDrawCapsLockIndicator;
	repaint();
	}
	}

	bool RenderTextControlSingleLine::hasControlClip() const
	{
	// Apply control clip for text fields with decorations.
	return !!containerElement();
	}

	LayoutRect RenderTextControlSingleLine::controlClipRect(const LayoutPoint& additionalOffset) const
	{
	ASSERT(hasControlClip());
	LayoutRect clipRect = contentBoxRect();
	if (containerElement()->renderBox())
	clipRect = unionRect(clipRect, containerElement()->renderBox()->frameRect());
	clipRect.moveBy(additionalOffset);
	return clipRect;
	}

	float RenderTextControlSingleLine::getAvgCharWidth(AtomicString family)
	{
	// Since Lucida Grande is the default font, we want this to match the width
	// of MS Shell Dlg, the default font for textareas in Firefox, Safari Win and
	// IE for some encodings (in IE, the default font is encoding specific).
	// 901 is the avgCharWidth value in the OS/2 table for MS Shell Dlg.
	if (family == "Lucida Grande")
	return scaleEmToUnits(901);

	return RenderTextControl::getAvgCharWidth(family);
	}

	LayoutUnit RenderTextControlSingleLine::preferredContentLogicalWidth(float charWidth) const
	{
	int factor;
	bool includesDecoration = inputElement()->sizeShouldIncludeDecoration(factor);
	if (factor <= 0)
	factor = 20;

	LayoutUnit result = LayoutUnit::fromFloatCeil(charWidth * factor);

	float maxCharWidth = 0.f;
	AtomicString family = style()->font().family().family();
	// Since Lucida Grande is the default font, we want this to match the width
	// of MS Shell Dlg, the default font for textareas in Firefox, Safari Win and
	// IE for some encodings (in IE, the default font is encoding specific).
	// 4027 is the (xMax - xMin) value in the "head" font table for MS Shell Dlg.
	if (family == "Lucida Grande")
	maxCharWidth = scaleEmToUnits(4027);
	else if (hasValidAvgCharWidth(family))
	maxCharWidth = roundf(style()->font().primaryFont()->maxCharWidth());

	// For text inputs, IE adds some extra width.
	if (maxCharWidth > 0.f)
	result += maxCharWidth - charWidth;

	if (includesDecoration) {
	HTMLElement* spinButton = innerSpinButtonElement();
	if (RenderBox* spinRenderer = spinButton ? spinButton->renderBox() : 0) {
	result += spinRenderer->borderAndPaddingLogicalWidth();
	// Since the width of spinRenderer is not calculated yet, spinRenderer->logicalWidth() returns 0.
	// So computedStyle()->logicalWidth() is used instead.
	result += spinButton->computedStyle()->logicalWidth().value();
	}
	}

	return result;
	}

	LayoutUnit RenderTextControlSingleLine::computeControlLogicalHeight(LayoutUnit lineHeight, LayoutUnit nonContentHeight) const
	{
	return lineHeight + nonContentHeight;
	}

	void RenderTextControlSingleLine::updateFromElement()
	{
	RenderTextControl::updateFromElement();
	}

	PassRefPtr<RenderStyle> RenderTextControlSingleLine::createInnerTextStyle(const RenderStyle* startStyle) const
	{
	RefPtr<RenderStyle> textBlockStyle = RenderStyle::create();
	textBlockStyle->inheritFrom(startStyle);
	adjustInnerTextStyle(textBlockStyle.get());

	textBlockStyle->setWhiteSpace(PRE);
	textBlockStyle->setOverflowWrap(NormalOverflowWrap);
	textBlockStyle->setOverflowX(OHIDDEN);
	textBlockStyle->setOverflowY(OHIDDEN);
	textBlockStyle->setTextOverflow(textShouldBeTruncated() ? TextOverflowEllipsis : TextOverflowClip);

	if (m_desiredInnerTextLogicalHeight >= 0)
	textBlockStyle->setLogicalHeight(Length(m_desiredInnerTextLogicalHeight, Fixed));
	// Do not allow line-height to be smaller than our default.
	if (textBlockStyle->fontMetrics().lineSpacing() > lineHeight(true, HorizontalLine, PositionOfInteriorLineBoxes))
	textBlockStyle->setLineHeight(RenderStyle::initialLineHeight());

	textBlockStyle->setDisplay(BLOCK);
	textBlockStyle->setUnique();

	return textBlockStyle.release();
	}

	bool RenderTextControlSingleLine::textShouldBeTruncated() const
	{
	return document().focusedElement() != node() && style()->textOverflow() == TextOverflowEllipsis;
	}

	void RenderTextControlSingleLine::autoscroll(const IntPoint& position)
	{
	RenderBox* renderer = innerTextElement()->renderBox();
	if (!renderer)
	return;

	renderer->autoscroll(position);
	}

	int RenderTextControlSingleLine::scrollWidth() const
	{
	if (innerTextElement())
	return innerTextElement()->scrollWidth();
	return RenderBlock::scrollWidth();
	}

	int RenderTextControlSingleLine::scrollHeight() const
	{
	if (innerTextElement())
	return innerTextElement()->scrollHeight();
	return RenderBlock::scrollHeight();
	}

	int RenderTextControlSingleLine::scrollLeft() const
	{
	if (innerTextElement())
	return innerTextElement()->scrollLeft();
	return RenderBlock::scrollLeft();
	}

	int RenderTextControlSingleLine::scrollTop() const
	{
	if (innerTextElement())
	return innerTextElement()->scrollTop();
	return RenderBlock::scrollTop();
	}

	void RenderTextControlSingleLine::setScrollLeft(int newLeft)
	{
	if (innerTextElement())
	innerTextElement()->setScrollLeft(newLeft);
	}

	void RenderTextControlSingleLine::setScrollTop(int newTop)
	{
	if (innerTextElement())
	innerTextElement()->setScrollTop(newTop);
	}

	HTMLInputElement* RenderTextControlSingleLine::inputElement() const
	{
	return toHTMLInputElement(node());
	}

	}