Source/WebCore/rendering/RenderTextControlSingleLine.cpp - 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 "RenderTextControlSingleLine.h"

 #include "CSSFontSelector.h"
 #include "CSSValueKeywords.h"
 #include "Font.h"
 #include "Frame.h"
 #include "FrameSelection.h"
 #include "FrameView.h"
 #include "HTMLNames.h"
 #include "HitTestResult.h"
 #include "LocalizedStrings.h"
 #include "RenderLayer.h"
 #include "RenderScrollbar.h"
 #include "RenderTheme.h"
 #include "RenderView.h"
 #include "StyleResolver.h"
 #include "TextControlInnerElements.h"
 #include <wtf/IsoMallocInlines.h>
 #include <wtf/StackStats.h>

 #if PLATFORM(IOS_FAMILY)
 #include "RenderThemeIOS.h"
 #endif

 namespace WebCore {

 using namespace HTMLNames;

 WTF_MAKE_ISO_ALLOCATED_IMPL(RenderTextControlSingleLine);
 WTF_MAKE_ISO_ALLOCATED_IMPL(RenderTextControlInnerBlock);

 RenderTextControlSingleLine::RenderTextControlSingleLine(HTMLInputElement& element, RenderStyle&& style)
     : RenderTextControl(element, WTFMove(style))
 {
 }

 RenderTextControlSingleLine::~RenderTextControlSingleLine() = default;

 inline HTMLElement* RenderTextControlSingleLine::innerSpinButtonElement() const
 {
     return inputElement().innerSpinButtonElement();
 }

 void RenderTextControlSingleLine::centerRenderer(RenderBox& renderer) const
 {
     LayoutUnit logicalHeightDiff = renderer.logicalHeight() - contentLogicalHeight();
     renderer.setLogicalTop(renderer.logicalTop() - logicalHeightDiff / 2);
 }

 static void resetOverriddenHeight(RenderBox* box, const RenderObject* ancestor)
 {
     ASSERT(box != ancestor);
     if (!box || box->style().logicalHeight().isAuto())
         return; // Null box or its height was not overridden.
     box->mutableStyle().setLogicalHeight(Length { Auto });
     for (RenderObject* renderer = box; renderer != ancestor; renderer = renderer->parent()) {
         ASSERT(renderer);
         renderer->setNeedsLayout(MarkOnlyThis);
     }
 }

 void RenderTextControlSingleLine::layout()
 {
     StackStats::LayoutCheckPoint layoutCheckPoint;

     // FIXME: We should remove the height-related hacks in layout() and
     // styleDidChange(). We need them because we want to:
     // - Center the inner elements vertically if the input height is taller than
     //   the intrinsic height of the inner elements.
     // - Shrink the heights of the inner elements if the input height is smaller
     //   than the intrinsic heights of the inner elements.
     // - Make the height of the container element equal to the intrinsic height of
     //   the inner elements when the field has a strong password button.
     //
     // 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.

     RenderTextControlInnerBlock* innerTextRenderer = innerTextElement()->renderer();
     RenderBox* innerBlockRenderer = innerBlockElement() ? innerBlockElement()->renderBox() : nullptr;
     HTMLElement* container = containerElement();
     RenderBox* containerRenderer = container ? container->renderBox() : nullptr;

     // To ensure consistency between layouts, we need to reset any conditionally overridden height.
     resetOverriddenHeight(innerTextRenderer, this);
     resetOverriddenHeight(innerBlockRenderer, this);
     resetOverriddenHeight(containerRenderer, this);

     // Save the old size of the inner text (if we have one) as we will need to layout the placeholder
     // and update selection if it changes. One way the size may change is if text decorations are
     // toggled. For example, hiding and showing the caps lock indicator will cause a size change.
     LayoutSize oldInnerTextSize;
     if (innerTextRenderer)
         oldInnerTextSize = innerTextRenderer->size();

     RenderBlockFlow::layoutBlock(false);

     // Set the text block height
     LayoutUnit desiredLogicalHeight = textBlockLogicalHeight();
     LayoutUnit logicalHeightLimit = logicalHeight();
     LayoutUnit innerTextLogicalHeight;
     if (innerTextRenderer)
         innerTextLogicalHeight = innerTextRenderer->logicalHeight();
     if (innerTextRenderer && innerTextLogicalHeight > logicalHeightLimit) {
         if (desiredLogicalHeight != innerTextLogicalHeight)
             setNeedsLayout(MarkOnlyThis);

         innerTextRenderer->mutableStyle().setLogicalHeight(Length(desiredLogicalHeight, Fixed));
         innerTextRenderer->setNeedsLayout(MarkOnlyThis);
         if (innerBlockRenderer) {
             innerBlockRenderer->mutableStyle().setLogicalHeight(Length(desiredLogicalHeight, Fixed));
             innerBlockRenderer->setNeedsLayout(MarkOnlyThis);
         }
         innerTextLogicalHeight = desiredLogicalHeight;
     }
     // The container might be taller because of decoration elements.
     LayoutUnit oldContainerLogicalTop;
     if (containerRenderer) {
         containerRenderer->layoutIfNeeded();
         oldContainerLogicalTop = containerRenderer->logicalTop();
         LayoutUnit containerLogicalHeight = containerRenderer->logicalHeight();
         if (inputElement().hasAutoFillStrongPasswordButton() && innerTextRenderer && containerLogicalHeight != innerTextLogicalHeight) {
             containerRenderer->mutableStyle().setLogicalHeight(Length { innerTextLogicalHeight, Fixed });
             setNeedsLayout(MarkOnlyThis);
         } else if (containerLogicalHeight > logicalHeightLimit) {
             containerRenderer->mutableStyle().setLogicalHeight(Length(logicalHeightLimit, Fixed));
             setNeedsLayout(MarkOnlyThis);
         } else if (containerRenderer->logicalHeight() < contentLogicalHeight()) {
             containerRenderer->mutableStyle().setLogicalHeight(Length(contentLogicalHeight(), Fixed));
             setNeedsLayout(MarkOnlyThis);
         } else
             containerRenderer->mutableStyle().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);

     // Fix up the y-position of the container as it may have been flexed when the strong password or strong
     // confirmation password button wraps to the next line.
     if (inputElement().hasAutoFillStrongPasswordButton() && containerRenderer)
         containerRenderer->setLogicalTop(oldContainerLogicalTop);

     // Center the child block in the block progression direction (vertical centering for horizontal text fields).
     if (!container && innerTextRenderer && innerTextRenderer->height() != contentLogicalHeight())
         centerRenderer(*innerTextRenderer);
     else if (container && containerRenderer && containerRenderer->height() != contentLogicalHeight())
         centerRenderer(*containerRenderer);

     bool innerTextSizeChanged = innerTextRenderer && innerTextRenderer->size() != oldInnerTextSize;

     HTMLElement* placeholderElement = inputElement().placeholderElement();
     if (RenderBox* placeholderBox = placeholderElement ? placeholderElement->renderBox() : 0) {
         LayoutSize innerTextSize;
         if (innerTextRenderer)
             innerTextSize = innerTextRenderer->size();
         placeholderBox->mutableStyle().setWidth(Length(innerTextSize.width() - placeholderBox->horizontalBorderAndPaddingExtent(), Fixed));
         placeholderBox->mutableStyle().setHeight(Length(innerTextSize.height() - placeholderBox->verticalBorderAndPaddingExtent(), Fixed));
         bool neededLayout = placeholderBox->needsLayout();
         bool placeholderBoxHadLayout = placeholderBox->everHadLayout();
         if (innerTextSizeChanged) {
             // The caps lock indicator was hidden. Layout the placeholder. Its layout does not affect its parent.
             placeholderBox->setChildNeedsLayout(MarkOnlyThis);
         }
         placeholderBox->layoutIfNeeded();
         LayoutPoint textOffset;
         if (innerTextRenderer)
             textOffset = innerTextRenderer->location();
         if (innerBlockElement() && innerBlockElement()->renderBox())
             textOffset += toLayoutSize(innerBlockElement()->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());
     }

 #if PLATFORM(IOS_FAMILY)
     // FIXME: We should not be adjusting styles during layout. <rdar://problem/7675493>
     if (inputElement().isSearchField())
         RenderThemeIOS::adjustRoundBorderRadius(mutableStyle(), *this);
 #endif
     if (innerTextSizeChanged && frame().selection().isFocusedAndActive() && document().focusedElement() == &inputElement()) {
         // The caps lock indicator was hidden or shown. If it is now visible then it may be occluding
         // the current selection (say, the caret was after the last character in the text field).
         // Schedule an update and reveal of the current selection.
         frame().selection().setNeedsSelectionUpdate(FrameSelection::RevealSelectionAfterUpdate::Forced);
     }
 }

 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.
     HTMLElement* container = containerElement();
     if (result.innerNode()->isDescendantOf(innerTextElement().get()) || result.innerNode() == &inputElement() || (container && container == result.innerNode())) {
         LayoutPoint pointInParent = locationInContainer.point();
         if (container && innerBlockElement()) {
             if (innerBlockElement()->renderBox())
                 pointInParent -= toLayoutSize(innerBlockElement()->renderBox()->location());
             if (container->renderBox())
                 pointInParent -= toLayoutSize(container->renderBox()->location());
         }
         hitInnerTextElement(result, pointInParent, accumulatedOffset);
     }
     return true;
 }

 void RenderTextControlSingleLine::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
 {
     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.
     HTMLElement* innerBlock = innerBlockElement();
     if (auto* innerBlockRenderer = innerBlock ? innerBlock->renderer() : nullptr) {
         innerBlockRenderer->mutableStyle().setHeight(Length());
         innerBlockRenderer->mutableStyle().setWidth(Length());
     }
     HTMLElement* container = containerElement();
     if (auto* containerRenderer = container ? container->renderer() : nullptr) {
         containerRenderer->mutableStyle().setHeight(Length());
         containerRenderer->mutableStyle().setWidth(Length());
     }
     if (diff == StyleDifference::Layout) {
         if (auto innerTextRenderer = innerTextElement()->renderer())
             innerTextRenderer->setNeedsLayout(MarkContainingBlockChain);
         if (auto* placeholder = inputElement().placeholderElement()) {
             if (placeholder->renderer())
                 placeholder->renderer()->setNeedsLayout(MarkContainingBlockChain);
         }
     }
     setHasOverflowClip(false);
 }

 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::getAverageCharWidth()
 {
 #if !PLATFORM(IOS_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 (style().fontCascade().firstFamily() == "Lucida Grande")
         return scaleEmToUnits(901);
 #endif

     return RenderTextControl::getAverageCharWidth();
 }

 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;

 #if !PLATFORM(IOS_FAMILY)
     const AtomicString& family = style().fontCascade().firstFamily();
     // 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 (style().fontCascade().hasValidAverageCharWidth())
         maxCharWidth = roundf(style().fontCascade().primaryFont().maxCharWidth());
 #endif

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

     if (includesDecoration)
         result += inputElement().decorationWidth();

     return result;
 }

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

 void RenderTextControlSingleLine::autoscroll(const IntPoint& position)
 {
     RenderTextControlInnerBlock* renderer = innerTextElement()->renderer();
     if (!renderer)
         return;
     RenderLayer* layer = renderer->layer();
     if (layer)
         layer->autoscroll(position);
 }

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

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

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

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

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

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

 bool RenderTextControlSingleLine::scroll(ScrollDirection direction, ScrollGranularity granularity, float multiplier, Element** stopElement, RenderBox* startBox, const IntPoint& wheelEventAbsolutePoint)
 {
     RenderTextControlInnerBlock* renderer = innerTextElement()->renderer();
     if (!renderer)
         return false;
     RenderLayer* layer = renderer->layer();
     if (layer && layer->scroll(direction, granularity, multiplier))
         return true;
     return RenderBlockFlow::scroll(direction, granularity, multiplier, stopElement, startBox, wheelEventAbsolutePoint);
 }

 bool RenderTextControlSingleLine::logicalScroll(ScrollLogicalDirection direction, ScrollGranularity granularity, float multiplier, Element** stopElement)
 {
     RenderLayer* layer = innerTextElement()->renderer()->layer();
     if (layer && layer->scroll(logicalToPhysical(direction, style().isHorizontalWritingMode(), style().isFlippedBlocksWritingMode()), granularity, multiplier))
         return true;
     return RenderBlockFlow::logicalScroll(direction, granularity, multiplier, stopElement);
 }

 HTMLInputElement& RenderTextControlSingleLine::inputElement() const
 {
     return downcast<HTMLInputElement>(RenderTextControl::textFormControlElement());
 }

 }
	/**
	* 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 "RenderTextControlSingleLine.h"

	#include "CSSFontSelector.h"
	#include "CSSValueKeywords.h"
	#include "Font.h"
	#include "Frame.h"
	#include "FrameSelection.h"
	#include "FrameView.h"
	#include "HTMLNames.h"
	#include "HitTestResult.h"
	#include "LocalizedStrings.h"
	#include "RenderLayer.h"
	#include "RenderScrollbar.h"
	#include "RenderTheme.h"
	#include "RenderView.h"
	#include "StyleResolver.h"
	#include "TextControlInnerElements.h"
	#include <wtf/IsoMallocInlines.h>
	#include <wtf/StackStats.h>

	#if PLATFORM(IOS_FAMILY)
	#include "RenderThemeIOS.h"
	#endif

	namespace WebCore {

	using namespace HTMLNames;

	WTF_MAKE_ISO_ALLOCATED_IMPL(RenderTextControlSingleLine);
	WTF_MAKE_ISO_ALLOCATED_IMPL(RenderTextControlInnerBlock);

	RenderTextControlSingleLine::RenderTextControlSingleLine(HTMLInputElement& element, RenderStyle&& style)
	: RenderTextControl(element, WTFMove(style))
	{
	}

	RenderTextControlSingleLine::~RenderTextControlSingleLine() = default;

	inline HTMLElement* RenderTextControlSingleLine::innerSpinButtonElement() const
	{
	return inputElement().innerSpinButtonElement();
	}

	void RenderTextControlSingleLine::centerRenderer(RenderBox& renderer) const
	{
	LayoutUnit logicalHeightDiff = renderer.logicalHeight() - contentLogicalHeight();
	renderer.setLogicalTop(renderer.logicalTop() - logicalHeightDiff / 2);
	}

	static void resetOverriddenHeight(RenderBox* box, const RenderObject* ancestor)
	{
	ASSERT(box != ancestor);
	if (!box \|\| box->style().logicalHeight().isAuto())
	return; // Null box or its height was not overridden.
	box->mutableStyle().setLogicalHeight(Length { Auto });
	for (RenderObject* renderer = box; renderer != ancestor; renderer = renderer->parent()) {
	ASSERT(renderer);
	renderer->setNeedsLayout(MarkOnlyThis);
	}
	}

	void RenderTextControlSingleLine::layout()
	{
	StackStats::LayoutCheckPoint layoutCheckPoint;

	// FIXME: We should remove the height-related hacks in layout() and
	// styleDidChange(). We need them because we want to:
	// - Center the inner elements vertically if the input height is taller than
	// the intrinsic height of the inner elements.
	// - Shrink the heights of the inner elements if the input height is smaller
	// than the intrinsic heights of the inner elements.
	// - Make the height of the container element equal to the intrinsic height of
	// the inner elements when the field has a strong password button.
	//
	// 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.

	RenderTextControlInnerBlock* innerTextRenderer = innerTextElement()->renderer();
	RenderBox* innerBlockRenderer = innerBlockElement() ? innerBlockElement()->renderBox() : nullptr;
	HTMLElement* container = containerElement();
	RenderBox* containerRenderer = container ? container->renderBox() : nullptr;

	// To ensure consistency between layouts, we need to reset any conditionally overridden height.
	resetOverriddenHeight(innerTextRenderer, this);
	resetOverriddenHeight(innerBlockRenderer, this);
	resetOverriddenHeight(containerRenderer, this);

	// Save the old size of the inner text (if we have one) as we will need to layout the placeholder
	// and update selection if it changes. One way the size may change is if text decorations are
	// toggled. For example, hiding and showing the caps lock indicator will cause a size change.
	LayoutSize oldInnerTextSize;
	if (innerTextRenderer)
	oldInnerTextSize = innerTextRenderer->size();

	RenderBlockFlow::layoutBlock(false);

	// Set the text block height
	LayoutUnit desiredLogicalHeight = textBlockLogicalHeight();
	LayoutUnit logicalHeightLimit = logicalHeight();
	LayoutUnit innerTextLogicalHeight;
	if (innerTextRenderer)
	innerTextLogicalHeight = innerTextRenderer->logicalHeight();
	if (innerTextRenderer && innerTextLogicalHeight > logicalHeightLimit) {
	if (desiredLogicalHeight != innerTextLogicalHeight)
	setNeedsLayout(MarkOnlyThis);

	innerTextRenderer->mutableStyle().setLogicalHeight(Length(desiredLogicalHeight, Fixed));
	innerTextRenderer->setNeedsLayout(MarkOnlyThis);
	if (innerBlockRenderer) {
	innerBlockRenderer->mutableStyle().setLogicalHeight(Length(desiredLogicalHeight, Fixed));
	innerBlockRenderer->setNeedsLayout(MarkOnlyThis);
	}
	innerTextLogicalHeight = desiredLogicalHeight;
	}
	// The container might be taller because of decoration elements.
	LayoutUnit oldContainerLogicalTop;
	if (containerRenderer) {
	containerRenderer->layoutIfNeeded();
	oldContainerLogicalTop = containerRenderer->logicalTop();
	LayoutUnit containerLogicalHeight = containerRenderer->logicalHeight();
	if (inputElement().hasAutoFillStrongPasswordButton() && innerTextRenderer && containerLogicalHeight != innerTextLogicalHeight) {
	containerRenderer->mutableStyle().setLogicalHeight(Length { innerTextLogicalHeight, Fixed });
	setNeedsLayout(MarkOnlyThis);
	} else if (containerLogicalHeight > logicalHeightLimit) {
	containerRenderer->mutableStyle().setLogicalHeight(Length(logicalHeightLimit, Fixed));
	setNeedsLayout(MarkOnlyThis);
	} else if (containerRenderer->logicalHeight() < contentLogicalHeight()) {
	containerRenderer->mutableStyle().setLogicalHeight(Length(contentLogicalHeight(), Fixed));
	setNeedsLayout(MarkOnlyThis);
	} else
	containerRenderer->mutableStyle().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);

	// Fix up the y-position of the container as it may have been flexed when the strong password or strong
	// confirmation password button wraps to the next line.
	if (inputElement().hasAutoFillStrongPasswordButton() && containerRenderer)
	containerRenderer->setLogicalTop(oldContainerLogicalTop);

	// Center the child block in the block progression direction (vertical centering for horizontal text fields).
	if (!container && innerTextRenderer && innerTextRenderer->height() != contentLogicalHeight())
	centerRenderer(*innerTextRenderer);
	else if (container && containerRenderer && containerRenderer->height() != contentLogicalHeight())
	centerRenderer(*containerRenderer);

	bool innerTextSizeChanged = innerTextRenderer && innerTextRenderer->size() != oldInnerTextSize;

	HTMLElement* placeholderElement = inputElement().placeholderElement();
	if (RenderBox* placeholderBox = placeholderElement ? placeholderElement->renderBox() : 0) {
	LayoutSize innerTextSize;
	if (innerTextRenderer)
	innerTextSize = innerTextRenderer->size();
	placeholderBox->mutableStyle().setWidth(Length(innerTextSize.width() - placeholderBox->horizontalBorderAndPaddingExtent(), Fixed));
	placeholderBox->mutableStyle().setHeight(Length(innerTextSize.height() - placeholderBox->verticalBorderAndPaddingExtent(), Fixed));
	bool neededLayout = placeholderBox->needsLayout();
	bool placeholderBoxHadLayout = placeholderBox->everHadLayout();
	if (innerTextSizeChanged) {
	// The caps lock indicator was hidden. Layout the placeholder. Its layout does not affect its parent.
	placeholderBox->setChildNeedsLayout(MarkOnlyThis);
	}
	placeholderBox->layoutIfNeeded();
	LayoutPoint textOffset;
	if (innerTextRenderer)
	textOffset = innerTextRenderer->location();
	if (innerBlockElement() && innerBlockElement()->renderBox())
	textOffset += toLayoutSize(innerBlockElement()->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());
	}

	#if PLATFORM(IOS_FAMILY)
	// FIXME: We should not be adjusting styles during layout. <rdar://problem/7675493>
	if (inputElement().isSearchField())
	RenderThemeIOS::adjustRoundBorderRadius(mutableStyle(), *this);
	#endif
	if (innerTextSizeChanged && frame().selection().isFocusedAndActive() && document().focusedElement() == &inputElement()) {
	// The caps lock indicator was hidden or shown. If it is now visible then it may be occluding
	// the current selection (say, the caret was after the last character in the text field).
	// Schedule an update and reveal of the current selection.
	frame().selection().setNeedsSelectionUpdate(FrameSelection::RevealSelectionAfterUpdate::Forced);
	}
	}

	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.
	HTMLElement* container = containerElement();
	if (result.innerNode()->isDescendantOf(innerTextElement().get()) \|\| result.innerNode() == &inputElement() \|\| (container && container == result.innerNode())) {
	LayoutPoint pointInParent = locationInContainer.point();
	if (container && innerBlockElement()) {
	if (innerBlockElement()->renderBox())
	pointInParent -= toLayoutSize(innerBlockElement()->renderBox()->location());
	if (container->renderBox())
	pointInParent -= toLayoutSize(container->renderBox()->location());
	}
	hitInnerTextElement(result, pointInParent, accumulatedOffset);
	}
	return true;
	}

	void RenderTextControlSingleLine::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
	{
	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.
	HTMLElement* innerBlock = innerBlockElement();
	if (auto* innerBlockRenderer = innerBlock ? innerBlock->renderer() : nullptr) {
	innerBlockRenderer->mutableStyle().setHeight(Length());
	innerBlockRenderer->mutableStyle().setWidth(Length());
	}
	HTMLElement* container = containerElement();
	if (auto* containerRenderer = container ? container->renderer() : nullptr) {
	containerRenderer->mutableStyle().setHeight(Length());
	containerRenderer->mutableStyle().setWidth(Length());
	}
	if (diff == StyleDifference::Layout) {
	if (auto innerTextRenderer = innerTextElement()->renderer())
	innerTextRenderer->setNeedsLayout(MarkContainingBlockChain);
	if (auto* placeholder = inputElement().placeholderElement()) {
	if (placeholder->renderer())
	placeholder->renderer()->setNeedsLayout(MarkContainingBlockChain);
	}
	}
	setHasOverflowClip(false);
	}

	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::getAverageCharWidth()
	{
	#if !PLATFORM(IOS_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 (style().fontCascade().firstFamily() == "Lucida Grande")
	return scaleEmToUnits(901);
	#endif

	return RenderTextControl::getAverageCharWidth();
	}

	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;

	#if !PLATFORM(IOS_FAMILY)
	const AtomicString& family = style().fontCascade().firstFamily();
	// 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 (style().fontCascade().hasValidAverageCharWidth())
	maxCharWidth = roundf(style().fontCascade().primaryFont().maxCharWidth());
	#endif

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

	if (includesDecoration)
	result += inputElement().decorationWidth();

	return result;
	}

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

	void RenderTextControlSingleLine::autoscroll(const IntPoint& position)
	{
	RenderTextControlInnerBlock* renderer = innerTextElement()->renderer();
	if (!renderer)
	return;
	RenderLayer* layer = renderer->layer();
	if (layer)
	layer->autoscroll(position);
	}

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

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

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

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

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

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

	bool RenderTextControlSingleLine::scroll(ScrollDirection direction, ScrollGranularity granularity, float multiplier, Element** stopElement, RenderBox* startBox, const IntPoint& wheelEventAbsolutePoint)
	{
	RenderTextControlInnerBlock* renderer = innerTextElement()->renderer();
	if (!renderer)
	return false;
	RenderLayer* layer = renderer->layer();
	if (layer && layer->scroll(direction, granularity, multiplier))
	return true;
	return RenderBlockFlow::scroll(direction, granularity, multiplier, stopElement, startBox, wheelEventAbsolutePoint);
	}

	bool RenderTextControlSingleLine::logicalScroll(ScrollLogicalDirection direction, ScrollGranularity granularity, float multiplier, Element** stopElement)
	{
	RenderLayer* layer = innerTextElement()->renderer()->layer();
	if (layer && layer->scroll(logicalToPhysical(direction, style().isHorizontalWritingMode(), style().isFlippedBlocksWritingMode()), granularity, multiplier))
	return true;
	return RenderBlockFlow::logicalScroll(direction, granularity, multiplier, stopElement);
	}

	HTMLInputElement& RenderTextControlSingleLine::inputElement() const
	{
	return downcast<HTMLInputElement>(RenderTextControl::textFormControlElement());
	}

	}