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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 "HTMLElement.h"
#include "InlineElementBox.h"
#include "RenderBlock.h"
#include "RootInlineBox.h"
#include "VisiblePosition.h"
namespace WebCore {
static const int invalidLineHeight = -1;
RenderLineBreak::RenderLineBreak(HTMLElement& element, PassRef<RenderStyle> style)
: RenderBoxModelObject(element, std::move(style), 0)
, m_inlineBoxWrapper(nullptr)
, m_cachedLineHeight(invalidLineHeight)
, m_isWBR(element.hasTagName(HTMLNames::wbrTag))
{
setIsLineBreak();
}
RenderLineBreak::~RenderLineBreak()
{
delete m_inlineBoxWrapper;
}
LayoutUnit RenderLineBreak::lineHeight(bool firstLine, LineDirectionMode /*direction*/, LinePositionMode /*linePositionMode*/) const
{
if (firstLine && document().styleSheetCollection().usesFirstLineRules()) {
const RenderStyle& firstLineStyle = this->firstLineStyle();
if (&firstLineStyle != &style())
return firstLineStyle.computedLineHeight(&view());
}
if (m_cachedLineHeight == invalidLineHeight)
m_cachedLineHeight = style().computedLineHeight(&view());
return m_cachedLineHeight;
}
int RenderLineBreak::baselinePosition(FontBaseline baselineType, bool firstLine, LineDirectionMode direction, LinePositionMode linePositionMode) const
{
const RenderStyle& style = firstLine ? firstLineStyle() : this->style();
const FontMetrics& fontMetrics = style.fontMetrics();
return fontMetrics.ascent(baselineType) + (lineHeight(firstLine, direction, linePositionMode) - fontMetrics.height()) / 2;
}
std::unique_ptr<InlineElementBox> RenderLineBreak::createInlineBox()
{
return std::make_unique<InlineElementBox>(*this);
}
void RenderLineBreak::setInlineBoxWrapper(InlineElementBox* inlineBox)
{
ASSERT(!inlineBox || !m_inlineBoxWrapper);
m_inlineBoxWrapper = inlineBox;
}
void RenderLineBreak::replaceInlineBoxWrapper(InlineElementBox& inlineBox)
{
deleteInlineBoxWrapper();
setInlineBoxWrapper(&inlineBox);
}
void RenderLineBreak::deleteInlineBoxWrapper()
{
if (!m_inlineBoxWrapper)
return;
if (!documentBeingDestroyed())
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&)
{
return createVisiblePosition(0, DOWNSTREAM);
}
void RenderLineBreak::setSelectionState(SelectionState state)
{
RenderBoxModelObject::setSelectionState(state);
if (!m_inlineBoxWrapper)
return;
m_inlineBoxWrapper->root().setHasSelectedChildren(state != SelectionNone);
}
LayoutRect RenderLineBreak::localCaretRect(InlineBox* inlineBox, int caretOffset, LayoutUnit* extraWidthToEndOfLine)
{
ASSERT_UNUSED(caretOffset, !caretOffset);
ASSERT_UNUSED(inlineBox, inlineBox == m_inlineBoxWrapper);
if (!inlineBox)
return LayoutRect();
static const unsigned caretWidth = 1;
const RootInlineBox& rootBox = inlineBox->root();
return rootBox.computeCaretRect(inlineBox->logicalLeft(), caretWidth, extraWidthToEndOfLine);
}
IntRect RenderLineBreak::linesBoundingBox() const
{
if (!m_inlineBoxWrapper)
return IntRect();
float logicalLeftSide = m_inlineBoxWrapper->logicalLeft();
float logicalRightSide = m_inlineBoxWrapper->logicalRight();
bool isHorizontal = style().isHorizontalWritingMode();
float x = isHorizontal ? logicalLeftSide : m_inlineBoxWrapper->x();
float y = isHorizontal ? m_inlineBoxWrapper->y() : logicalLeftSide;
float width = isHorizontal ? logicalRightSide - logicalLeftSide : m_inlineBoxWrapper->logicalBottom() - x;
float height = isHorizontal ? m_inlineBoxWrapper->logicalBottom() - y : logicalRightSide - logicalLeftSide;
return enclosingIntRect(FloatRect(x, y, width, height));
}
void RenderLineBreak::absoluteRects(Vector<IntRect>& rects, const LayoutPoint& accumulatedOffset) const
{
if (!m_inlineBoxWrapper)
return;
rects.append(enclosingIntRect(FloatRect(accumulatedOffset + m_inlineBoxWrapper->topLeft(), m_inlineBoxWrapper->size())));
}
void RenderLineBreak::absoluteQuads(Vector<FloatQuad>& quads, bool* wasFixed) const
{
if (!m_inlineBoxWrapper)
return;
quads.append(localToAbsoluteQuad(FloatRect(m_inlineBoxWrapper->topLeft(), m_inlineBoxWrapper->size()), 0 /* mode */, wasFixed));
}
void RenderLineBreak::updateFromStyle()
{
m_cachedLineHeight = invalidLineHeight;
}
IntRect RenderLineBreak::borderBoundingBox() const
{
return IntRect(IntPoint(), linesBoundingBox().size());
}
} // namespace WebCore
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