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/**
* Copyright (C) 2006, 2007, 2014 Apple Inc. All rights reserved.
* (C) 2008 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
*
* 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 "RenderTextControl.h"
#include "HTMLTextFormControlElement.h"
#include "HitTestResult.h"
#include "RenderText.h"
#include "RenderTextControlSingleLine.h"
#include "RenderTheme.h"
#include "ScrollbarTheme.h"
#include "StyleInheritedData.h"
#include "StyleProperties.h"
#include "TextControlInnerElements.h"
#include "VisiblePosition.h"
#include <wtf/IsoMallocInlines.h>
#include <wtf/unicode/CharacterNames.h>
namespace WebCore {
WTF_MAKE_ISO_ALLOCATED_IMPL(RenderTextControl);
WTF_MAKE_ISO_ALLOCATED_IMPL(RenderTextControlInnerContainer);
RenderTextControl::RenderTextControl(HTMLTextFormControlElement& element, RenderStyle&& style)
: RenderBlockFlow(element, WTFMove(style))
{
}
RenderTextControl::~RenderTextControl() = default;
HTMLTextFormControlElement& RenderTextControl::textFormControlElement() const
{
return downcast<HTMLTextFormControlElement>(nodeForNonAnonymous());
}
RefPtr<TextControlInnerTextElement> RenderTextControl::innerTextElement() const
{
return textFormControlElement().innerTextElement();
}
void RenderTextControl::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
{
RenderBlockFlow::styleDidChange(diff, oldStyle);
auto innerText = innerTextElement();
if (!innerText)
return;
RenderTextControlInnerBlock* innerTextRenderer = innerText->renderer();
if (innerTextRenderer) {
// 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.
innerTextRenderer->mutableStyle().setHeight(Length());
innerTextRenderer->mutableStyle().setWidth(Length());
innerTextRenderer->setStyle(textFormControlElement().createInnerTextStyle(style()));
}
textFormControlElement().updatePlaceholderVisibility();
}
int RenderTextControl::textBlockLogicalHeight() const
{
return logicalHeight() - borderAndPaddingLogicalHeight();
}
int RenderTextControl::textBlockLogicalWidth() const
{
auto innerText = innerTextElement();
ASSERT(innerText);
LayoutUnit unitWidth = logicalWidth() - borderAndPaddingLogicalWidth();
if (innerText->renderer())
unitWidth -= innerText->renderBox()->paddingStart() + innerText->renderBox()->paddingEnd();
return unitWidth;
}
int RenderTextControl::scrollbarThickness() const
{
// FIXME: We should get the size of the scrollbar from the RenderTheme instead.
return ScrollbarTheme::theme().scrollbarThickness();
}
RenderBox::LogicalExtentComputedValues RenderTextControl::computeLogicalHeight(LayoutUnit logicalHeight, LayoutUnit logicalTop) const
{
auto innerText = innerTextElement();
ASSERT(innerText);
if (RenderBox* innerTextBox = innerText->renderBox()) {
LayoutUnit nonContentHeight = innerTextBox->verticalBorderAndPaddingExtent() + innerTextBox->verticalMarginExtent();
logicalHeight = computeControlLogicalHeight(innerTextBox->lineHeight(true, HorizontalLine, PositionOfInteriorLineBoxes), nonContentHeight);
// We are able to have a horizontal scrollbar if the overflow style is scroll, or if its auto and there's no word wrap.
if ((isHorizontalWritingMode() && (style().overflowX() == OSCROLL || (style().overflowX() == OAUTO && innerText->renderer()->style().overflowWrap() == NormalOverflowWrap)))
|| (!isHorizontalWritingMode() && (style().overflowY() == OSCROLL || (style().overflowY() == OAUTO && innerText->renderer()->style().overflowWrap() == NormalOverflowWrap))))
logicalHeight += scrollbarThickness();
// FIXME: The logical height of the inner text box should have been added
// before calling computeLogicalHeight to avoid this hack.
cacheIntrinsicContentLogicalHeightForFlexItem(logicalHeight);
logicalHeight += verticalBorderAndPaddingExtent();
}
return RenderBox::computeLogicalHeight(logicalHeight, logicalTop);
}
void RenderTextControl::hitInnerTextElement(HitTestResult& result, const LayoutPoint& pointInContainer, const LayoutPoint& accumulatedOffset)
{
auto innerText = innerTextElement();
if (!innerText->renderer())
return;
LayoutPoint adjustedLocation = accumulatedOffset + location();
LayoutPoint localPoint = pointInContainer - toLayoutSize(adjustedLocation + innerText->renderBox()->location()) + toLayoutSize(scrollPosition());
result.setInnerNode(innerText.get());
result.setInnerNonSharedNode(innerText.get());
result.setLocalPoint(localPoint);
}
float RenderTextControl::getAverageCharWidth()
{
float width;
if (style().fontCascade().fastAverageCharWidthIfAvailable(width))
return width;
const UChar ch = '0';
const String str = String(&ch, 1);
const FontCascade& font = style().fontCascade();
TextRun textRun = constructTextRun(str, style(), AllowTrailingExpansion);
return font.width(textRun);
}
float RenderTextControl::scaleEmToUnits(int x) const
{
// This matches the unitsPerEm value for MS Shell Dlg and Courier New from the "head" font table.
float unitsPerEm = 2048.0f;
return roundf(style().fontCascade().size() * x / unitsPerEm);
}
void RenderTextControl::computeIntrinsicLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const
{
// Use average character width. Matches IE.
maxLogicalWidth = preferredContentLogicalWidth(const_cast<RenderTextControl*>(this)->getAverageCharWidth());
if (RenderBox* innerTextRenderBox = innerTextElement()->renderBox())
maxLogicalWidth += innerTextRenderBox->paddingStart() + innerTextRenderBox->paddingEnd();
if (!style().logicalWidth().isPercentOrCalculated())
minLogicalWidth = maxLogicalWidth;
}
void RenderTextControl::computePreferredLogicalWidths()
{
ASSERT(preferredLogicalWidthsDirty());
m_minPreferredLogicalWidth = 0;
m_maxPreferredLogicalWidth = 0;
if (style().logicalWidth().isFixed() && style().logicalWidth().value() >= 0)
m_minPreferredLogicalWidth = m_maxPreferredLogicalWidth = adjustContentBoxLogicalWidthForBoxSizing(style().logicalWidth().value());
else
computeIntrinsicLogicalWidths(m_minPreferredLogicalWidth, m_maxPreferredLogicalWidth);
if (style().logicalMinWidth().isFixed() && style().logicalMinWidth().value() > 0) {
m_maxPreferredLogicalWidth = std::max(m_maxPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(style().logicalMinWidth().value()));
m_minPreferredLogicalWidth = std::max(m_minPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(style().logicalMinWidth().value()));
}
if (style().logicalMaxWidth().isFixed()) {
m_maxPreferredLogicalWidth = std::min(m_maxPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(style().logicalMaxWidth().value()));
m_minPreferredLogicalWidth = std::min(m_minPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(style().logicalMaxWidth().value()));
}
LayoutUnit toAdd = borderAndPaddingLogicalWidth();
m_minPreferredLogicalWidth += toAdd;
m_maxPreferredLogicalWidth += toAdd;
setPreferredLogicalWidthsDirty(false);
}
void RenderTextControl::addFocusRingRects(Vector<LayoutRect>& rects, const LayoutPoint& additionalOffset, const RenderLayerModelObject*)
{
if (!size().isEmpty())
rects.append(LayoutRect(additionalOffset, size()));
}
void RenderTextControl::layoutExcludedChildren(bool relayoutChildren)
{
RenderBlockFlow::layoutExcludedChildren(relayoutChildren);
HTMLElement* placeholder = textFormControlElement().placeholderElement();
RenderElement* placeholderRenderer = placeholder ? placeholder->renderer() : 0;
if (!placeholderRenderer)
return;
placeholderRenderer->setIsExcludedFromNormalLayout(true);
if (relayoutChildren) {
// The markParents arguments should be false because this function is
// called from layout() of the parent and the placeholder layout doesn't
// affect the parent layout.
placeholderRenderer->setChildNeedsLayout(MarkOnlyThis);
}
}
#if PLATFORM(IOS)
bool RenderTextControl::canScroll() const
{
auto innerText = innerTextElement();
return innerText && innerText->renderer() && innerText->renderer()->hasOverflowClip();
}
int RenderTextControl::innerLineHeight() const
{
auto innerText = innerTextElement();
if (innerText && innerText->renderer())
return innerText->renderer()->style().computedLineHeight();
return style().computedLineHeight();
}
#endif
} // namespace WebCore