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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 "RenderBoxInlines.h"
#include "RenderBoxModelObjectInlines.h"
#include "RenderElementInlines.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 && oldStyle) {
// FIXME: The height property of the inner text block style may be mutated by RenderTextControlSingleLine::layout.
// See if the original has changed before setting it and triggering a layout.
auto newInnerTextStyle = textFormControlElement().createInnerTextStyle(style());
auto oldInnerTextStyle = textFormControlElement().createInnerTextStyle(*oldStyle);
if (newInnerTextStyle != oldInnerTextStyle)
innerTextRenderer->setStyle(WTFMove(newInnerTextStyle));
else if (diff == StyleDifference::RepaintIfText || diff == StyleDifference::Repaint) {
// Repaint is expected to be propagated down to the shadow tree when non-inherited style property changes
// (e.g. text-decoration-color) since that's where the value actually takes effect.
innerTextRenderer->repaint();
}
}
textFormControlElement().updatePlaceholderVisibility();
}
int RenderTextControl::scrollbarThickness() const
{
// FIXME: We should get the size of the scrollbar from the RenderTheme instead.
return ScrollbarTheme::theme().scrollbarThickness(this->style().scrollbarWidth());
}
RenderBox::LogicalExtentComputedValues RenderTextControl::computeLogicalHeight(LayoutUnit logicalHeight, LayoutUnit logicalTop) const
{
auto innerText = innerTextElement();
if (!innerText)
return RenderBox::computeLogicalHeight(LayoutUnit(), LayoutUnit());
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.
auto shouldIncludeScrollbarHeight = [&] {
auto& style = this->style();
auto isHorizontalWritingMode = this->isHorizontalWritingMode();
return (isHorizontalWritingMode && style.overflowX() == Overflow::Scroll) || (!isHorizontalWritingMode && style.overflowY() == Overflow::Scroll);
};
if (shouldIncludeScrollbarHeight())
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(), ExpansionBehavior::allowRightOnly());
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
{
if (shouldApplySizeOrInlineSizeContainment()) {
if (auto width = explicitIntrinsicInnerLogicalWidth()) {
minLogicalWidth = width.value();
maxLogicalWidth = width.value();
}
return;
}
// Use average character width. Matches IE.
maxLogicalWidth = preferredContentLogicalWidth(const_cast<RenderTextControl*>(this)->getAverageCharWidth());
if (RenderBox* innerTextRenderBox = innerTextElement() ? innerTextElement()->renderBox() : nullptr)
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());
else
computeIntrinsicLogicalWidths(m_minPreferredLogicalWidth, m_maxPreferredLogicalWidth);
RenderBox::computePreferredLogicalWidths(style().logicalMinWidth(), style().logicalMaxWidth(), borderAndPaddingLogicalWidth());
setPreferredLogicalWidthsDirty(false);
}
void RenderTextControl::addFocusRingRects(Vector<LayoutRect>& rects, const LayoutPoint& additionalOffset, const RenderLayerModelObject*) const
{
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_FAMILY)
bool RenderTextControl::canScroll() const
{
auto innerText = innerTextElement();
return innerText && innerText->renderer() && innerText->renderer()->hasNonVisibleOverflow();
}
int RenderTextControl::innerLineHeight() const
{
auto innerText = innerTextElement();
if (innerText && innerText->renderer())
return innerText->renderer()->style().computedLineHeight();
return style().computedLineHeight();
}
#endif
RenderTextControlInnerContainer::RenderTextControlInnerContainer(Element& element, RenderStyle&& style)
: RenderFlexibleBox(element, WTFMove(style))
{
}
} // namespace WebCore
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