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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 "InlineIteratorBox.h"
#include "InlineIteratorLine.h"
#include "InlineRunAndOffset.h"
#include "LegacyInlineElementBox.h"
#include "LegacyRootInlineBox.h"
#include "LogicalSelectionOffsetCaches.h"
#include "RenderBlock.h"
#include "RenderView.h"
#include "SVGElementTypeHelpers.h"
#include "SVGInlineTextBox.h"
#include "VisiblePosition.h"
#include <wtf/IsoMallocInlines.h>
#if PLATFORM(IOS_FAMILY)
#include "SelectionGeometry.h"
#endif
namespace WebCore {
WTF_MAKE_ISO_ALLOCATED_IMPL(RenderLineBreak);
static const int invalidLineHeight = -1;
RenderLineBreak::RenderLineBreak(HTMLElement& element, RenderStyle&& style)
: RenderBoxModelObject(element, WTFMove(style), 0)
, m_inlineBoxWrapper(nullptr)
, m_cachedLineHeight(invalidLineHeight)
, m_isWBR(is<HTMLWBRElement>(element))
{
setIsLineBreak();
}
RenderLineBreak::~RenderLineBreak()
{
delete m_inlineBoxWrapper;
}
LayoutUnit RenderLineBreak::lineHeight(bool firstLine, LineDirectionMode /*direction*/, LinePositionMode /*linePositionMode*/) const
{
if (firstLine && view().usesFirstLineRules()) {
const RenderStyle& firstLineStyle = this->firstLineStyle();
if (&firstLineStyle != &style())
return firstLineStyle.computedLineHeight();
}
if (m_cachedLineHeight == invalidLineHeight)
m_cachedLineHeight = style().computedLineHeight();
return m_cachedLineHeight;
}
LayoutUnit RenderLineBreak::baselinePosition(FontBaseline baselineType, bool firstLine, LineDirectionMode direction, LinePositionMode linePositionMode) const
{
const RenderStyle& style = firstLine ? firstLineStyle() : this->style();
const FontMetrics& fontMetrics = style.fontMetrics();
return LayoutUnit { (fontMetrics.ascent(baselineType) + (lineHeight(firstLine, direction, linePositionMode) - fontMetrics.height()) / 2).toInt() };
}
std::unique_ptr<LegacyInlineElementBox> RenderLineBreak::createInlineBox()
{
return makeUnique<LegacyInlineElementBox>(*this);
}
void RenderLineBreak::setInlineBoxWrapper(LegacyInlineElementBox* inlineBox)
{
ASSERT(!inlineBox || !m_inlineBoxWrapper);
m_inlineBoxWrapper = inlineBox;
}
void RenderLineBreak::replaceInlineBoxWrapper(LegacyInlineElementBox& inlineBox)
{
deleteInlineBoxWrapper();
setInlineBoxWrapper(&inlineBox);
}
void RenderLineBreak::deleteInlineBoxWrapper()
{
if (!m_inlineBoxWrapper)
return;
if (!renderTreeBeingDestroyed())
m_inlineBoxWrapper->removeFromParent();
delete m_inlineBoxWrapper;
m_inlineBoxWrapper = nullptr;
}
void RenderLineBreak::dirtyLineBoxes(bool fullLayout)
{
if (!m_inlineBoxWrapper)
return;
if (fullLayout) {
delete m_inlineBoxWrapper;
m_inlineBoxWrapper = nullptr;
return;
}
m_inlineBoxWrapper->dirtyLineBoxes();
}
int RenderLineBreak::caretMinOffset() const
{
return 0;
}
int RenderLineBreak::caretMaxOffset() const
{
return 1;
}
bool RenderLineBreak::canBeSelectionLeaf() const
{
return true;
}
VisiblePosition RenderLineBreak::positionForPoint(const LayoutPoint&, const RenderFragmentContainer*)
{
return createVisiblePosition(0, Affinity::Downstream);
}
IntRect RenderLineBreak::linesBoundingBox() const
{
auto run = InlineIterator::boxFor(*this);
if (!run)
return { };
return enclosingIntRect(run->rect());
}
void RenderLineBreak::absoluteRects(Vector<IntRect>& rects, const LayoutPoint& accumulatedOffset) const
{
auto box = InlineIterator::boxFor(*this);
if (!box)
return;
auto rect = box->rect();
rects.append(enclosingIntRect(FloatRect(accumulatedOffset + rect.location(), rect.size())));
}
void RenderLineBreak::absoluteQuads(Vector<FloatQuad>& quads, bool* wasFixed) const
{
auto box = InlineIterator::boxFor(*this);
if (!box)
return;
auto rect = box->rect();
quads.append(localToAbsoluteQuad(FloatRect(rect.location(), rect.size()), UseTransforms, wasFixed));
}
void RenderLineBreak::updateFromStyle()
{
m_cachedLineHeight = invalidLineHeight;
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 line = run->line();
auto lineSelectionRect = line->selectionRect();
LayoutRect rect = IntRect(run->logicalLeft(), lineSelectionRect.y(), 0, lineSelectionRect.height());
if (!line->isHorizontal())
rect = rect.transposedRect();
if (line->legacyRootInlineBox() && line->legacyRootInlineBox()->isFirstAfterPageBreak()) {
if (run->isHorizontal())
rect.shiftYEdgeTo(line->lineBoxTop());
else
rect.shiftXEdgeTo(line->lineBoxTop());
}
// 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->previousOnLine();
bool isLastOnLine = !run->nextOnLine();
if (containingBlock->isRubyBase() || containingBlock->isRubyText())
isLastOnLine = !containingBlock->containingBlock()->inlineBoxWrapper()->nextOnLineExists();
bool isFixed = false;
auto absoluteQuad = localToAbsoluteQuad(FloatRect(rect), UseTransforms, &isFixed);
bool boxIsHorizontal = !is<SVGInlineTextBox>(run->legacyInlineBox()) ? run->isHorizontal() : !style().isVerticalWritingMode();
// If the containing block is an inline element, we want to check the inlineBoxWrapper orientation
// to determine the orientation of the block. In this case we also use the inlineBoxWrapper to
// determine if the element is the last on the line.
if (containingBlock->inlineBoxWrapper()) {
if (containingBlock->inlineBoxWrapper()->isHorizontal() != boxIsHorizontal) {
boxIsHorizontal = containingBlock->inlineBoxWrapper()->isHorizontal();
isLastOnLine = !containingBlock->inlineBoxWrapper()->nextOnLineExists();
}
}
rects.append(SelectionGeometry(absoluteQuad, HTMLElement::selectionRenderingBehavior(element()), run->direction(), extentsRect.x(), extentsRect.maxX(), extentsRect.maxY(), 0, run->isLineBreak(), isFirstOnLine, isLastOnLine, false, false, boxIsHorizontal, isFixed, containingBlock->isRubyText(), view().pageNumberForBlockProgressionOffset(absoluteQuad.enclosingBoundingBox().x())));
}
#endif
} // namespace WebCore