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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "config.h"
#include "core/paint/TableCellPainter.h"
#include "core/paint/BlockPainter.h"
#include "core/paint/BoxPainter.h"
#include "core/paint/RenderDrawingRecorder.h"
#include "core/rendering/PaintInfo.h"
#include "core/rendering/RenderTableCell.h"
namespace blink {
inline CollapsedBorderValue TableCellPainter::cachedCollapsedLeftBorder(const RenderStyle* styleForCellFlow) const
{
if (styleForCellFlow->isHorizontalWritingMode()) {
return styleForCellFlow->isLeftToRightDirection() ? m_renderTableCell.section()->cachedCollapsedBorder(&m_renderTableCell, CBSStart)
: m_renderTableCell.section()->cachedCollapsedBorder(&m_renderTableCell, CBSEnd);
}
return styleForCellFlow->isFlippedBlocksWritingMode() ? m_renderTableCell.section()->cachedCollapsedBorder(&m_renderTableCell, CBSAfter)
: m_renderTableCell.section()->cachedCollapsedBorder(&m_renderTableCell, CBSBefore);
}
inline CollapsedBorderValue TableCellPainter::cachedCollapsedRightBorder(const RenderStyle* styleForCellFlow) const
{
if (styleForCellFlow->isHorizontalWritingMode()) {
return styleForCellFlow->isLeftToRightDirection() ? m_renderTableCell.section()->cachedCollapsedBorder(&m_renderTableCell, CBSEnd)
: m_renderTableCell.section()->cachedCollapsedBorder(&m_renderTableCell, CBSStart);
}
return styleForCellFlow->isFlippedBlocksWritingMode() ? m_renderTableCell.section()->cachedCollapsedBorder(&m_renderTableCell, CBSBefore)
: m_renderTableCell.section()->cachedCollapsedBorder(&m_renderTableCell, CBSAfter);
}
inline CollapsedBorderValue TableCellPainter::cachedCollapsedTopBorder(const RenderStyle* styleForCellFlow) const
{
if (styleForCellFlow->isHorizontalWritingMode())
return styleForCellFlow->isFlippedBlocksWritingMode() ? m_renderTableCell.section()->cachedCollapsedBorder(&m_renderTableCell, CBSAfter) : m_renderTableCell.section()->cachedCollapsedBorder(&m_renderTableCell, CBSBefore);
return styleForCellFlow->isLeftToRightDirection() ? m_renderTableCell.section()->cachedCollapsedBorder(&m_renderTableCell, CBSStart) : m_renderTableCell.section()->cachedCollapsedBorder(&m_renderTableCell, CBSEnd);
}
inline CollapsedBorderValue TableCellPainter::cachedCollapsedBottomBorder(const RenderStyle* styleForCellFlow) const
{
if (styleForCellFlow->isHorizontalWritingMode()) {
return styleForCellFlow->isFlippedBlocksWritingMode() ? m_renderTableCell.section()->cachedCollapsedBorder(&m_renderTableCell, CBSBefore)
: m_renderTableCell.section()->cachedCollapsedBorder(&m_renderTableCell, CBSAfter);
}
return styleForCellFlow->isLeftToRightDirection() ? m_renderTableCell.section()->cachedCollapsedBorder(&m_renderTableCell, CBSEnd)
: m_renderTableCell.section()->cachedCollapsedBorder(&m_renderTableCell, CBSStart);
}
void TableCellPainter::paint(const PaintInfo& paintInfo, const LayoutPoint& paintOffset)
{
ASSERT(paintInfo.phase != PaintPhaseCollapsedTableBorders);
BlockPainter(m_renderTableCell).paint(paintInfo, paintOffset);
}
struct CollapsedBorder {
CollapsedBorderValue borderValue;
BoxSide side;
bool shouldPaint;
int x1;
int y1;
int x2;
int y2;
EBorderStyle style;
};
class CollapsedBorders {
public:
CollapsedBorders()
: m_count(0)
{
}
void addBorder(const CollapsedBorderValue& borderValue, BoxSide borderSide, bool shouldPaint, int x1, int y1, int x2, int y2, EBorderStyle borderStyle)
{
if (borderValue.exists() && shouldPaint) {
m_borders[m_count].borderValue = borderValue;
m_borders[m_count].side = borderSide;
m_borders[m_count].shouldPaint = shouldPaint;
m_borders[m_count].x1 = x1;
m_borders[m_count].x2 = x2;
m_borders[m_count].y1 = y1;
m_borders[m_count].y2 = y2;
m_borders[m_count].style = borderStyle;
m_count++;
}
}
CollapsedBorder* nextBorder()
{
for (unsigned i = 0; i < m_count; i++) {
if (m_borders[i].borderValue.exists() && m_borders[i].shouldPaint) {
m_borders[i].shouldPaint = false;
return &m_borders[i];
}
}
return 0;
}
CollapsedBorder m_borders[4];
unsigned m_count;
};
static EBorderStyle collapsedBorderStyle(EBorderStyle style)
{
if (style == OUTSET)
return GROOVE;
if (style == INSET)
return RIDGE;
return style;
}
void TableCellPainter::paintCollapsedBorders(const PaintInfo& paintInfo, const LayoutPoint& paintOffset)
{
ASSERT(paintInfo.phase == PaintPhaseCollapsedTableBorders);
if (!paintInfo.shouldPaintWithinRoot(&m_renderTableCell) || m_renderTableCell.style()->visibility() != VISIBLE)
return;
LayoutRect paintRect = paintBounds(paintOffset, AddOffsetFromParent);
if (paintRect.y() - m_renderTableCell.table()->outerBorderTop() >= paintInfo.rect.maxY())
return;
if (paintRect.maxY() + m_renderTableCell.table()->outerBorderBottom() <= paintInfo.rect.y())
return;
if (!m_renderTableCell.table()->currentBorderValue())
return;
RenderDrawingRecorder recorder(paintInfo.context, m_renderTableCell, paintInfo.phase, paintRect);
if (recorder.canUseCachedDrawing())
return;
const RenderStyle* styleForCellFlow = m_renderTableCell.styleForCellFlow();
CollapsedBorderValue leftVal = cachedCollapsedLeftBorder(styleForCellFlow);
CollapsedBorderValue rightVal = cachedCollapsedRightBorder(styleForCellFlow);
CollapsedBorderValue topVal = cachedCollapsedTopBorder(styleForCellFlow);
CollapsedBorderValue bottomVal = cachedCollapsedBottomBorder(styleForCellFlow);
// Adjust our x/y/width/height so that we paint the collapsed borders at the correct location.
int topWidth = topVal.width();
int bottomWidth = bottomVal.width();
int leftWidth = leftVal.width();
int rightWidth = rightVal.width();
IntRect borderRect = pixelSnappedIntRect(paintRect.x() - leftWidth / 2,
paintRect.y() - topWidth / 2,
paintRect.width() + leftWidth / 2 + (rightWidth + 1) / 2,
paintRect.height() + topWidth / 2 + (bottomWidth + 1) / 2);
EBorderStyle topStyle = collapsedBorderStyle(topVal.style());
EBorderStyle bottomStyle = collapsedBorderStyle(bottomVal.style());
EBorderStyle leftStyle = collapsedBorderStyle(leftVal.style());
EBorderStyle rightStyle = collapsedBorderStyle(rightVal.style());
bool renderTop = topStyle > BHIDDEN && !topVal.isTransparent();
bool renderBottom = bottomStyle > BHIDDEN && !bottomVal.isTransparent();
bool renderLeft = leftStyle > BHIDDEN && !leftVal.isTransparent();
bool renderRight = rightStyle > BHIDDEN && !rightVal.isTransparent();
// We never paint diagonals at the joins. We simply let the border with the highest
// precedence paint on top of borders with lower precedence.
CollapsedBorders borders;
borders.addBorder(topVal, BSTop, renderTop, borderRect.x(), borderRect.y(), borderRect.maxX(), borderRect.y() + topWidth, topStyle);
borders.addBorder(bottomVal, BSBottom, renderBottom, borderRect.x(), borderRect.maxY() - bottomWidth, borderRect.maxX(), borderRect.maxY(), bottomStyle);
borders.addBorder(leftVal, BSLeft, renderLeft, borderRect.x(), borderRect.y(), borderRect.x() + leftWidth, borderRect.maxY(), leftStyle);
borders.addBorder(rightVal, BSRight, renderRight, borderRect.maxX() - rightWidth, borderRect.y(), borderRect.maxX(), borderRect.maxY(), rightStyle);
GraphicsContext* graphicsContext = paintInfo.context;
bool antialias = BoxPainter::shouldAntialiasLines(graphicsContext);
for (CollapsedBorder* border = borders.nextBorder(); border; border = borders.nextBorder()) {
if (border->borderValue.isSameIgnoringColor(*m_renderTableCell.table()->currentBorderValue())) {
ObjectPainter::drawLineForBoxSide(graphicsContext, border->x1, border->y1, border->x2, border->y2, border->side,
border->borderValue.color().resolve(m_renderTableCell.resolveColor(CSSPropertyColor)), border->style, 0, 0, antialias);
}
}
}
void TableCellPainter::paintBackgroundsBehindCell(const PaintInfo& paintInfo, const LayoutPoint& paintOffset, RenderObject* backgroundObject)
{
if (!paintInfo.shouldPaintWithinRoot(&m_renderTableCell))
return;
if (!backgroundObject)
return;
if (m_renderTableCell.style()->visibility() != VISIBLE)
return;
RenderTable* tableElt = m_renderTableCell.table();
if (!tableElt->collapseBorders() && m_renderTableCell.style()->emptyCells() == HIDE && !m_renderTableCell.firstChild())
return;
Color c = backgroundObject->resolveColor(CSSPropertyBackgroundColor);
const FillLayer& bgLayer = backgroundObject->style()->backgroundLayers();
LayoutRect paintRect = paintBounds(paintOffset, backgroundObject != &m_renderTableCell ? AddOffsetFromParent : DoNotAddOffsetFromParent);
if (bgLayer.hasImage() || c.alpha()) {
// We have to clip here because the background would paint
// on top of the borders otherwise. This only matters for cells and rows.
bool shouldClip = backgroundObject->hasLayer() && (backgroundObject == &m_renderTableCell || backgroundObject == m_renderTableCell.parent()) && tableElt->collapseBorders();
GraphicsContextStateSaver stateSaver(*paintInfo.context, shouldClip);
if (shouldClip) {
LayoutRect clipRect(paintRect.location(), m_renderTableCell.size());
clipRect.expand(m_renderTableCell.borderInsets());
paintInfo.context->clip(clipRect);
}
BoxPainter(m_renderTableCell).paintFillLayers(paintInfo, c, bgLayer, paintRect, BackgroundBleedNone, CompositeSourceOver, backgroundObject);
}
}
void TableCellPainter::paintBoxDecorationBackground(const PaintInfo& paintInfo, const LayoutPoint& paintOffset)
{
if (!paintInfo.shouldPaintWithinRoot(&m_renderTableCell))
return;
RenderTable* tableElt = m_renderTableCell.table();
if (!tableElt->collapseBorders() && m_renderTableCell.style()->emptyCells() == HIDE && !m_renderTableCell.firstChild())
return;
LayoutRect paintRect = paintBounds(paintOffset, DoNotAddOffsetFromParent);
RenderDrawingRecorder recorder(paintInfo.context, m_renderTableCell, paintInfo.phase, pixelSnappedIntRect(paintRect));
if (recorder.canUseCachedDrawing())
return;
BoxPainter::paintBoxShadow(paintInfo, paintRect, m_renderTableCell.style(), Normal);
// Paint our cell background.
paintBackgroundsBehindCell(paintInfo, paintOffset, &m_renderTableCell);
BoxPainter::paintBoxShadow(paintInfo, paintRect, m_renderTableCell.style(), Inset);
if (!m_renderTableCell.style()->hasBorder() || tableElt->collapseBorders())
return;
BoxPainter::paintBorder(m_renderTableCell, paintInfo, paintRect, m_renderTableCell.style());
}
void TableCellPainter::paintMask(const PaintInfo& paintInfo, const LayoutPoint& paintOffset)
{
if (m_renderTableCell.style()->visibility() != VISIBLE || paintInfo.phase != PaintPhaseMask)
return;
RenderTable* tableElt = m_renderTableCell.table();
if (!tableElt->collapseBorders() && m_renderTableCell.style()->emptyCells() == HIDE && !m_renderTableCell.firstChild())
return;
BoxPainter(m_renderTableCell).paintMaskImages(paintInfo, paintBounds(paintOffset, DoNotAddOffsetFromParent));
}
LayoutRect TableCellPainter::paintBounds(const LayoutPoint& paintOffset, PaintBoundOffsetBehavior paintBoundOffsetBehavior)
{
LayoutPoint adjustedPaintOffset = paintOffset;
if (paintBoundOffsetBehavior == AddOffsetFromParent)
adjustedPaintOffset.moveBy(m_renderTableCell.location());
return LayoutRect(adjustedPaintOffset, LayoutSize(m_renderTableCell.pixelSnappedSize()));
}
} // namespace blink
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