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/**
* Copyright (C) 2000 Lars Knoll (knoll@kde.org)
* Copyright (C) 2006, 2013 Apple Inc. All rights reserved.
*
* 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 "RenderLineBreak.h"
#include "Document.h"
#include "FontMetrics.h"
#include "HTMLElement.h"
#include "HTMLWBRElement.h"
#include "InlineIteratorBoxInlines.h"
#include "InlineIteratorLineBox.h"
#include "InlineIteratorSVGTextBox.h"
#include "InlineRunAndOffset.h"
#include "LineSelection.h"
#include "LogicalSelectionOffsetCaches.h"
#include "RenderBlock.h"
#include "RenderBoxModelObjectInlines.h"
#include "RenderView.h"
#include "SVGElementTypeHelpers.h"
#include "SVGInlineTextBox.h"
#include "VisiblePosition.h"
#include <wtf/TZoneMallocInlines.h>
#if PLATFORM(IOS_FAMILY)
#include "SelectionGeometry.h"
#endif
namespace WebCore {
WTF_MAKE_TZONE_OR_ISO_ALLOCATED_IMPL(RenderLineBreak);
RenderLineBreak::RenderLineBreak(HTMLElement& element, RenderStyle&& style)
: RenderBoxModelObject(Type::LineBreak, element, WTFMove(style), { }, is<HTMLWBRElement>(element) ? OptionSet<LineBreakFlag> { LineBreakFlag::IsWBR } : OptionSet<LineBreakFlag> { })
{
ASSERT(isRenderLineBreak());
}
RenderLineBreak::~RenderLineBreak()
{
}
LayoutUnit RenderLineBreak::lineHeight(bool firstLine, LineDirectionMode /*direction*/, LinePositionMode /*linePositionMode*/) const
{
if (firstLine) {
auto& firstLineStyle = this->firstLineStyle();
if (&firstLineStyle != &style())
return LayoutUnit::fromFloatCeil(firstLineStyle.computedLineHeight());
}
if (!m_cachedLineHeight)
m_cachedLineHeight = LayoutUnit::fromFloatCeil(style().computedLineHeight());
return *m_cachedLineHeight;
}
LayoutUnit RenderLineBreak::baselinePosition(FontBaseline baselineType, bool firstLine, LineDirectionMode direction, LinePositionMode linePositionMode) const
{
auto& style = firstLine ? firstLineStyle() : this->style();
auto& fontMetrics = style.metricsOfPrimaryFont();
return LayoutUnit { (fontMetrics.ascent(baselineType) + (lineHeight(firstLine, direction, linePositionMode) - fontMetrics.height()) / 2) };
}
int RenderLineBreak::caretMinOffset() const
{
return 0;
}
int RenderLineBreak::caretMaxOffset() const
{
return 1;
}
bool RenderLineBreak::canBeSelectionLeaf() const
{
return true;
}
VisiblePosition RenderLineBreak::positionForPoint(const LayoutPoint&, HitTestSource, const RenderFragmentContainer*)
{
return createVisiblePosition(0, Affinity::Downstream);
}
IntRect RenderLineBreak::linesBoundingBox() const
{
auto run = InlineIterator::boxFor(*this);
if (!run)
return { };
return enclosingIntRect(run->visualRectIgnoringBlockDirection());
}
void RenderLineBreak::boundingRects(Vector<LayoutRect>& rects, const LayoutPoint& accumulatedOffset) const
{
auto box = InlineIterator::boxFor(*this);
if (!box)
return;
auto rect = LayoutRect { box->visualRectIgnoringBlockDirection() };
rect.moveBy(accumulatedOffset);
rects.append(rect);
}
void RenderLineBreak::absoluteQuads(Vector<FloatQuad>& quads, bool* wasFixed) const
{
auto box = InlineIterator::boxFor(*this);
if (!box)
return;
auto rect = box->visualRectIgnoringBlockDirection();
quads.append(localToAbsoluteQuad(FloatRect(rect.location(), rect.size()), UseTransforms, wasFixed));
}
void RenderLineBreak::updateFromStyle()
{
m_cachedLineHeight = { };
RELEASE_ASSERT_WITH_SECURITY_IMPLICATION(isInline());
}
#if PLATFORM(IOS_FAMILY)
void RenderLineBreak::collectSelectionGeometries(Vector<SelectionGeometry>& rects, unsigned, unsigned)
{
auto run = InlineIterator::boxFor(*this);
if (!run)
return;
auto lineBox = run->lineBox();
auto lineSelectionRect = LineSelection::logicalRect(*lineBox);
LayoutRect rect = IntRect(run->logicalLeftIgnoringInlineDirection(), lineSelectionRect.y(), 0, lineSelectionRect.height());
if (!lineBox->isHorizontal())
rect = rect.transposedRect();
if (lineBox->isFirstAfterPageBreak()) {
if (run->isHorizontal())
rect.shiftYEdgeTo(lineBox->logicalTop());
else
rect.shiftXEdgeTo(lineBox->logicalTop());
}
// FIXME: Out-of-flow positioned line breaks do not follow normal containing block chain.
auto* containingBlock = RenderObject::containingBlockForPositionType(PositionType::Static, *this);
// Map rect, extended left to leftOffset, and right to rightOffset, through transforms to get minX and maxX.
LogicalSelectionOffsetCaches cache(*containingBlock);
LayoutUnit leftOffset = containingBlock->logicalLeftSelectionOffset(*containingBlock, LayoutUnit(run->logicalTop()), cache);
LayoutUnit rightOffset = containingBlock->logicalRightSelectionOffset(*containingBlock, LayoutUnit(run->logicalTop()), cache);
LayoutRect extentsRect = rect;
if (run->isHorizontal()) {
extentsRect.setX(leftOffset);
extentsRect.setWidth(rightOffset - leftOffset);
} else {
extentsRect.setY(leftOffset);
extentsRect.setHeight(rightOffset - leftOffset);
}
extentsRect = localToAbsoluteQuad(FloatRect(extentsRect)).enclosingBoundingBox();
if (!run->isHorizontal())
extentsRect = extentsRect.transposedRect();
bool isFirstOnLine = !run->nextLineLeftwardOnLine();
bool isLastOnLine = !run->nextLineRightwardOnLine();
bool isFixed = false;
auto absoluteQuad = localToAbsoluteQuad(FloatRect(rect), UseTransforms, &isFixed);
bool boxIsHorizontal = !is<InlineIterator::SVGTextBoxIterator>(run) ? run->isHorizontal() : !writingMode().isVertical();
rects.append(SelectionGeometry(absoluteQuad, HTMLElement::selectionRenderingBehavior(element()), run->direction(), extentsRect.x(), extentsRect.maxX(), extentsRect.maxY(), 0, run->isLineBreak(), isFirstOnLine, isLastOnLine, false, false, boxIsHorizontal, isFixed, view().pageNumberForBlockProgressionOffset(absoluteQuad.enclosingBoundingBox().x())));
}
#endif
} // namespace WebCore
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