blob: b7cad7440240878e88ee90ec3e9cb249c980cc44 [file] [log] [blame]
/*
* Copyright (C) 1997 Martin Jones (mjones@kde.org)
* (C) 1997 Torben Weis (weis@kde.org)
* (C) 1998 Waldo Bastian (bastian@kde.org)
* (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 1999 Antti Koivisto (koivisto@kde.org)
* Copyright (C) 2003, 2004, 2005, 2006, 2007 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 "RenderTableCell.h"
#include "FloatQuad.h"
#include "GraphicsContext.h"
#include "HTMLNames.h"
#include "HTMLTableCellElement.h"
#include "RenderTableCol.h"
#include "RenderView.h"
#include "TransformState.h"
using namespace std;
namespace WebCore {
using namespace HTMLNames;
RenderTableCell::RenderTableCell(Node* node)
: RenderBlock(node)
, m_row(-1)
, m_column(-1)
, m_rowSpan(1)
, m_columnSpan(1)
, m_intrinsicPaddingTop(0)
, m_intrinsicPaddingBottom(0)
, m_percentageHeight(0)
{
updateFromElement();
}
void RenderTableCell::destroy()
{
RenderTableSection* recalcSection = parent() ? section() : 0;
RenderBlock::destroy();
if (recalcSection)
recalcSection->setNeedsCellRecalc();
}
void RenderTableCell::updateFromElement()
{
Node* n = node();
if (n && (n->hasTagName(tdTag) || n->hasTagName(thTag))) {
HTMLTableCellElement* tc = static_cast<HTMLTableCellElement*>(n);
int oldRSpan = m_rowSpan;
int oldCSpan = m_columnSpan;
m_columnSpan = tc->colSpan();
m_rowSpan = tc->rowSpan();
if ((oldRSpan != m_rowSpan || oldCSpan != m_columnSpan) && style() && parent()) {
setNeedsLayoutAndPrefWidthsRecalc();
if (section())
section()->setNeedsCellRecalc();
}
}
}
Length RenderTableCell::styleOrColWidth() const
{
Length w = style()->width();
if (colSpan() > 1 || !w.isAuto())
return w;
RenderTableCol* tableCol = table()->colElement(col());
if (tableCol) {
w = tableCol->style()->width();
// Column widths specified on <col> apply to the border box of the cell.
// Percentages don't need to be handled since they're always treated this way (even when specified on the cells).
// See Bugzilla bug 8126 for details.
if (w.isFixed() && w.value() > 0)
w = Length(max(0, w.value() - borderLeft() - borderRight() - paddingLeft() - paddingRight()), Fixed);
}
return w;
}
void RenderTableCell::calcPrefWidths()
{
// The child cells rely on the grids up in the sections to do their calcPrefWidths work. Normally the sections are set up early, as table
// cells are added, but relayout can cause the cells to be freed, leaving stale pointers in the sections'
// grids. We must refresh those grids before the child cells try to use them.
table()->recalcSectionsIfNeeded();
RenderBlock::calcPrefWidths();
if (node() && style()->autoWrap()) {
// See if nowrap was set.
Length w = styleOrColWidth();
String nowrap = static_cast<Element*>(node())->getAttribute(nowrapAttr);
if (!nowrap.isNull() && w.isFixed())
// Nowrap is set, but we didn't actually use it because of the
// fixed width set on the cell. Even so, it is a WinIE/Moz trait
// to make the minwidth of the cell into the fixed width. They do this
// even in strict mode, so do not make this a quirk. Affected the top
// of hiptop.com.
m_minPrefWidth = max(w.value(), m_minPrefWidth);
}
}
void RenderTableCell::calcWidth()
{
}
void RenderTableCell::updateWidth(int w)
{
if (w != width()) {
setWidth(w);
setCellWidthChanged(true);
}
}
void RenderTableCell::layout()
{
layoutBlock(cellWidthChanged());
setCellWidthChanged(false);
}
int RenderTableCell::paddingTop(bool includeIntrinsicPadding) const
{
return RenderBlock::paddingTop() + (includeIntrinsicPadding ? intrinsicPaddingTop() : 0);
}
int RenderTableCell::paddingBottom(bool includeIntrinsicPadding) const
{
return RenderBlock::paddingBottom() + (includeIntrinsicPadding ? intrinsicPaddingBottom() : 0);
}
void RenderTableCell::setOverrideSize(int size)
{
clearIntrinsicPadding();
RenderBlock::setOverrideSize(size);
}
IntRect RenderTableCell::clippedOverflowRectForRepaint(RenderBoxModelObject* repaintContainer)
{
// If the table grid is dirty, we cannot get reliable information about adjoining cells,
// so we ignore outside borders. This should not be a problem because it means that
// the table is going to recalculate the grid, relayout and repaint its current rect, which
// includes any outside borders of this cell.
if (!table()->collapseBorders() || table()->needsSectionRecalc())
return RenderBlock::clippedOverflowRectForRepaint(repaintContainer);
bool rtl = table()->style()->direction() == RTL;
int outlineSize = style()->outlineSize();
int left = max(borderHalfLeft(true), outlineSize);
int right = max(borderHalfRight(true), outlineSize);
int top = max(borderHalfTop(true), outlineSize);
int bottom = max(borderHalfBottom(true), outlineSize);
if ((left && !rtl) || (right && rtl)) {
if (RenderTableCell* before = table()->cellBefore(this)) {
top = max(top, before->borderHalfTop(true));
bottom = max(bottom, before->borderHalfBottom(true));
}
}
if ((left && rtl) || (right && !rtl)) {
if (RenderTableCell* after = table()->cellAfter(this)) {
top = max(top, after->borderHalfTop(true));
bottom = max(bottom, after->borderHalfBottom(true));
}
}
if (top) {
if (RenderTableCell* above = table()->cellAbove(this)) {
left = max(left, above->borderHalfLeft(true));
right = max(right, above->borderHalfRight(true));
}
}
if (bottom) {
if (RenderTableCell* below = table()->cellBelow(this)) {
left = max(left, below->borderHalfLeft(true));
right = max(right, below->borderHalfRight(true));
}
}
left = max(left, -overflowLeft(false));
top = max(top, -overflowTop(false));
IntRect r(-left, - top, left + max(width() + right, overflowWidth(false)), top + max(height() + bottom, overflowHeight(false)));
if (RenderView* v = view()) {
// FIXME: layoutDelta needs to be applied in parts before/after transforms and
// repaint containers. https://bugs.webkit.org/show_bug.cgi?id=23308
r.move(v->layoutDelta());
}
computeRectForRepaint(repaintContainer, r);
return r;
}
void RenderTableCell::computeRectForRepaint(RenderBoxModelObject* repaintContainer, IntRect& r, bool fixed)
{
if (repaintContainer == this)
return;
r.setY(r.y());
RenderView* v = view();
if ((!v || !v->layoutStateEnabled()) && parent())
r.move(-parentBox()->x(), -parentBox()->y()); // Rows are in the same coordinate space, so don't add their offset in.
RenderBlock::computeRectForRepaint(repaintContainer, r, fixed);
}
void RenderTableCell::mapLocalToContainer(RenderBoxModelObject* repaintContainer, bool fixed, bool useTransforms, TransformState& transformState) const
{
if (repaintContainer == this)
return;
RenderView* v = view();
if ((!v || !v->layoutStateEnabled()) && parent()) {
// Rows are in the same coordinate space, so don't add their offset in.
// FIXME: this is wrong with transforms
transformState.move(-parentBox()->x(), -parentBox()->y());
}
RenderBlock::mapLocalToContainer(repaintContainer, fixed, useTransforms, transformState);
}
void RenderTableCell::mapAbsoluteToLocalPoint(bool fixed, bool useTransforms, TransformState& transformState) const
{
RenderBlock::mapAbsoluteToLocalPoint(fixed, useTransforms, transformState);
if (parent()) {
// Rows are in the same coordinate space, so add their offset back in.
// FIXME: this is wrong with transforms
transformState.move(parentBox()->x(), parentBox()->y());
}
}
int RenderTableCell::baselinePosition(bool firstLine, bool isRootLineBox) const
{
if (isRootLineBox)
return RenderBox::baselinePosition(firstLine, isRootLineBox);
// <http://www.w3.org/TR/2007/CR-CSS21-20070719/tables.html#height-layout>: The baseline of a cell is the baseline of
// the first in-flow line box in the cell, or the first in-flow table-row in the cell, whichever comes first. If there
// is no such line box or table-row, the baseline is the bottom of content edge of the cell box.
int firstLineBaseline = firstLineBoxBaseline();
if (firstLineBaseline != -1)
return firstLineBaseline;
return paddingTop() + borderTop() + contentHeight();
}
void RenderTableCell::styleWillChange(StyleDifference diff, const RenderStyle* newStyle)
{
if (parent() && section() && style() && style()->height() != newStyle->height())
section()->setNeedsCellRecalc();
ASSERT(newStyle->display() == TABLE_CELL);
RenderBlock::styleWillChange(diff, newStyle);
}
void RenderTableCell::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
{
RenderBlock::styleDidChange(diff, oldStyle);
setHasBoxDecorations(true);
}
// The following rules apply for resolving conflicts and figuring out which border
// to use.
// (1) Borders with the 'border-style' of 'hidden' take precedence over all other conflicting
// borders. Any border with this value suppresses all borders at this location.
// (2) Borders with a style of 'none' have the lowest priority. Only if the border properties of all
// the elements meeting at this edge are 'none' will the border be omitted (but note that 'none' is
// the default value for the border style.)
// (3) If none of the styles are 'hidden' and at least one of them is not 'none', then narrow borders
// are discarded in favor of wider ones. If several have the same 'border-width' then styles are preferred
// in this order: 'double', 'solid', 'dashed', 'dotted', 'ridge', 'outset', 'groove', and the lowest: 'inset'.
// (4) If border styles differ only in color, then a style set on a cell wins over one on a row,
// which wins over a row group, column, column group and, lastly, table. It is undefined which color
// is used when two elements of the same type disagree.
static CollapsedBorderValue compareBorders(const CollapsedBorderValue& border1, const CollapsedBorderValue& border2)
{
// Sanity check the values passed in. If either is null, return the other.
if (!border2.exists())
return border1;
if (!border1.exists())
return border2;
// Rule #1 above.
if (border1.style() == BHIDDEN || border2.style() == BHIDDEN)
return CollapsedBorderValue(); // No border should exist at this location.
// Rule #2 above. A style of 'none' has lowest priority and always loses to any other border.
if (border2.style() == BNONE)
return border1;
if (border1.style() == BNONE)
return border2;
// The first part of rule #3 above. Wider borders win.
if (border1.width() != border2.width())
return border1.width() > border2.width() ? border1 : border2;
// The borders have equal width. Sort by border style.
if (border1.style() != border2.style())
return border1.style() > border2.style() ? border1 : border2;
// The border have the same width and style. Rely on precedence (cell over row over row group, etc.)
return border1.precedence >= border2.precedence ? border1 : border2;
}
CollapsedBorderValue RenderTableCell::collapsedLeftBorder(bool rtl) const
{
RenderTable* tableElt = table();
bool leftmostColumn;
if (!rtl)
leftmostColumn = col() == 0;
else {
int effCol = tableElt->colToEffCol(col() + colSpan() - 1);
leftmostColumn = effCol == tableElt->numEffCols() - 1;
}
// For border left, we need to check, in order of precedence:
// (1) Our left border.
CollapsedBorderValue result(&style()->borderLeft(), BCELL);
// (2) The right border of the cell to the left.
RenderTableCell* prevCell = rtl ? tableElt->cellAfter(this) : tableElt->cellBefore(this);
if (prevCell) {
result = rtl ? compareBorders(result, CollapsedBorderValue(&prevCell->style()->borderRight(), BCELL)) : compareBorders(CollapsedBorderValue(&prevCell->style()->borderRight(), BCELL), result);
if (!result.exists())
return result;
} else if (leftmostColumn) {
// (3) Our row's left border.
result = compareBorders(result, CollapsedBorderValue(&parent()->style()->borderLeft(), BROW));
if (!result.exists())
return result;
// (4) Our row group's left border.
result = compareBorders(result, CollapsedBorderValue(&section()->style()->borderLeft(), BROWGROUP));
if (!result.exists())
return result;
}
// (5) Our column and column group's left borders.
bool startColEdge;
bool endColEdge;
RenderTableCol* colElt = tableElt->colElement(col() + (rtl ? colSpan() - 1 : 0), &startColEdge, &endColEdge);
if (colElt && (!rtl ? startColEdge : endColEdge)) {
result = compareBorders(result, CollapsedBorderValue(&colElt->style()->borderLeft(), BCOL));
if (!result.exists())
return result;
if (colElt->parent()->isTableCol() && (!rtl ? !colElt->previousSibling() : !colElt->nextSibling())) {
result = compareBorders(result, CollapsedBorderValue(&colElt->parent()->style()->borderLeft(), BCOLGROUP));
if (!result.exists())
return result;
}
}
// (6) The right border of the column to the left.
if (!leftmostColumn) {
colElt = tableElt->colElement(col() + (rtl ? colSpan() : -1), &startColEdge, &endColEdge);
if (colElt && (!rtl ? endColEdge : startColEdge)) {
result = rtl ? compareBorders(result, CollapsedBorderValue(&colElt->style()->borderRight(), BCOL)) : compareBorders(CollapsedBorderValue(&colElt->style()->borderRight(), BCOL), result);
if (!result.exists())
return result;
}
} else {
// (7) The table's left border.
result = compareBorders(result, CollapsedBorderValue(&tableElt->style()->borderLeft(), BTABLE));
if (!result.exists())
return result;
}
return result;
}
CollapsedBorderValue RenderTableCell::collapsedRightBorder(bool rtl) const
{
RenderTable* tableElt = table();
bool rightmostColumn;
if (rtl)
rightmostColumn = col() == 0;
else {
int effCol = tableElt->colToEffCol(col() + colSpan() - 1);
rightmostColumn = effCol == tableElt->numEffCols() - 1;
}
// For border right, we need to check, in order of precedence:
// (1) Our right border.
CollapsedBorderValue result = CollapsedBorderValue(&style()->borderRight(), BCELL);
// (2) The left border of the cell to the right.
if (!rightmostColumn) {
RenderTableCell* nextCell = rtl ? tableElt->cellBefore(this) : tableElt->cellAfter(this);
if (nextCell && nextCell->style()) {
result = rtl ? compareBorders(CollapsedBorderValue(&nextCell->style()->borderLeft(), BCELL), result) : compareBorders(result, CollapsedBorderValue(&nextCell->style()->borderLeft(), BCELL));
if (!result.exists())
return result;
}
} else {
// (3) Our row's right border.
result = compareBorders(result, CollapsedBorderValue(&parent()->style()->borderRight(), BROW));
if (!result.exists())
return result;
// (4) Our row group's right border.
result = compareBorders(result, CollapsedBorderValue(&section()->style()->borderRight(), BROWGROUP));
if (!result.exists())
return result;
}
// (5) Our column and column group's right borders.
bool startColEdge;
bool endColEdge;
RenderTableCol* colElt = tableElt->colElement(col() + (rtl ? 0 : colSpan() - 1), &startColEdge, &endColEdge);
if (colElt && (!rtl ? endColEdge : startColEdge)) {
result = compareBorders(result, CollapsedBorderValue(&colElt->style()->borderRight(), BCOL));
if (!result.exists())
return result;
if (colElt->parent()->isTableCol() && (!rtl ? !colElt->nextSibling() : !colElt->previousSibling())) {
result = compareBorders(result, CollapsedBorderValue(&colElt->parent()->style()->borderRight(), BCOLGROUP));
if (!result.exists())
return result;
}
}
// (6) The left border of the column to the right.
if (!rightmostColumn) {
colElt = tableElt->colElement(col() + (rtl ? -1 : colSpan()), &startColEdge, &endColEdge);
if (colElt && (!rtl ? startColEdge : endColEdge)) {
result = rtl ? compareBorders(CollapsedBorderValue(&colElt->style()->borderLeft(), BCOL), result) : compareBorders(result, CollapsedBorderValue(&colElt->style()->borderLeft(), BCOL));
if (!result.exists())
return result;
}
} else {
// (7) The table's right border.
result = compareBorders(result, CollapsedBorderValue(&tableElt->style()->borderRight(), BTABLE));
if (!result.exists())
return result;
}
return result;
}
CollapsedBorderValue RenderTableCell::collapsedTopBorder() const
{
// For border top, we need to check, in order of precedence:
// (1) Our top border.
CollapsedBorderValue result = CollapsedBorderValue(&style()->borderTop(), BCELL);
RenderTableCell* prevCell = table()->cellAbove(this);
if (prevCell) {
// (2) A previous cell's bottom border.
result = compareBorders(CollapsedBorderValue(&prevCell->style()->borderBottom(), BCELL), result);
if (!result.exists())
return result;
}
// (3) Our row's top border.
result = compareBorders(result, CollapsedBorderValue(&parent()->style()->borderTop(), BROW));
if (!result.exists())
return result;
// (4) The previous row's bottom border.
if (prevCell) {
RenderObject* prevRow = 0;
if (prevCell->section() == section())
prevRow = parent()->previousSibling();
else
prevRow = prevCell->section()->lastChild();
if (prevRow) {
result = compareBorders(CollapsedBorderValue(&prevRow->style()->borderBottom(), BROW), result);
if (!result.exists())
return result;
}
}
// Now check row groups.
RenderTableSection* currSection = section();
if (!row()) {
// (5) Our row group's top border.
result = compareBorders(result, CollapsedBorderValue(&currSection->style()->borderTop(), BROWGROUP));
if (!result.exists())
return result;
// (6) Previous row group's bottom border.
currSection = table()->sectionAbove(currSection);
if (currSection) {
result = compareBorders(CollapsedBorderValue(&currSection->style()->borderBottom(), BROWGROUP), result);
if (!result.exists())
return result;
}
}
if (!currSection) {
// (8) Our column and column group's top borders.
RenderTableCol* colElt = table()->colElement(col());
if (colElt) {
result = compareBorders(result, CollapsedBorderValue(&colElt->style()->borderTop(), BCOL));
if (!result.exists())
return result;
if (colElt->parent()->isTableCol()) {
result = compareBorders(result, CollapsedBorderValue(&colElt->parent()->style()->borderTop(), BCOLGROUP));
if (!result.exists())
return result;
}
}
// (9) The table's top border.
result = compareBorders(result, CollapsedBorderValue(&table()->style()->borderTop(), BTABLE));
if (!result.exists())
return result;
}
return result;
}
CollapsedBorderValue RenderTableCell::collapsedBottomBorder() const
{
// For border top, we need to check, in order of precedence:
// (1) Our bottom border.
CollapsedBorderValue result = CollapsedBorderValue(&style()->borderBottom(), BCELL);
RenderTableCell* nextCell = table()->cellBelow(this);
if (nextCell) {
// (2) A following cell's top border.
result = compareBorders(result, CollapsedBorderValue(&nextCell->style()->borderTop(), BCELL));
if (!result.exists())
return result;
}
// (3) Our row's bottom border. (FIXME: Deal with rowspan!)
result = compareBorders(result, CollapsedBorderValue(&parent()->style()->borderBottom(), BROW));
if (!result.exists())
return result;
// (4) The next row's top border.
if (nextCell) {
result = compareBorders(result, CollapsedBorderValue(&nextCell->parent()->style()->borderTop(), BROW));
if (!result.exists())
return result;
}
// Now check row groups.
RenderTableSection* currSection = section();
if (row() + rowSpan() >= static_cast<RenderTableSection*>(currSection)->numRows()) {
// (5) Our row group's bottom border.
result = compareBorders(result, CollapsedBorderValue(&currSection->style()->borderBottom(), BROWGROUP));
if (!result.exists())
return result;
// (6) Following row group's top border.
currSection = table()->sectionBelow(currSection);
if (currSection) {
result = compareBorders(result, CollapsedBorderValue(&currSection->style()->borderTop(), BROWGROUP));
if (!result.exists())
return result;
}
}
if (!currSection) {
// (8) Our column and column group's bottom borders.
RenderTableCol* colElt = table()->colElement(col());
if (colElt) {
result = compareBorders(result, CollapsedBorderValue(&colElt->style()->borderBottom(), BCOL));
if (!result.exists()) return result;
if (colElt->parent()->isTableCol()) {
result = compareBorders(result, CollapsedBorderValue(&colElt->parent()->style()->borderBottom(), BCOLGROUP));
if (!result.exists())
return result;
}
}
// (9) The table's bottom border.
result = compareBorders(result, CollapsedBorderValue(&table()->style()->borderBottom(), BTABLE));
if (!result.exists())
return result;
}
return result;
}
int RenderTableCell::borderLeft() const
{
return table()->collapseBorders() ? borderHalfLeft(false) : RenderBlock::borderLeft();
}
int RenderTableCell::borderRight() const
{
return table()->collapseBorders() ? borderHalfRight(false) : RenderBlock::borderRight();
}
int RenderTableCell::borderTop() const
{
return table()->collapseBorders() ? borderHalfTop(false) : RenderBlock::borderTop();
}
int RenderTableCell::borderBottom() const
{
return table()->collapseBorders() ? borderHalfBottom(false) : RenderBlock::borderBottom();
}
int RenderTableCell::borderHalfLeft(bool outer) const
{
CollapsedBorderValue border = collapsedLeftBorder(table()->style()->direction() == RTL);
if (border.exists())
return (border.width() + (outer ? 0 : 1)) / 2; // Give the extra pixel to top and left.
return 0;
}
int RenderTableCell::borderHalfRight(bool outer) const
{
CollapsedBorderValue border = collapsedRightBorder(table()->style()->direction() == RTL);
if (border.exists())
return (border.width() + (outer ? 1 : 0)) / 2;
return 0;
}
int RenderTableCell::borderHalfTop(bool outer) const
{
CollapsedBorderValue border = collapsedTopBorder();
if (border.exists())
return (border.width() + (outer ? 0 : 1)) / 2; // Give the extra pixel to top and left.
return 0;
}
int RenderTableCell::borderHalfBottom(bool outer) const
{
CollapsedBorderValue border = collapsedBottomBorder();
if (border.exists())
return (border.width() + (outer ? 1 : 0)) / 2;
return 0;
}
void RenderTableCell::paint(PaintInfo& paintInfo, int tx, int ty)
{
if (paintInfo.phase == PaintPhaseCollapsedTableBorders && style()->visibility() == VISIBLE) {
if (!shouldPaintWithinRoot(paintInfo))
return;
tx += x();
ty += y();
int os = 2 * maximalOutlineSize(paintInfo.phase);
if (ty - table()->outerBorderTop() < paintInfo.rect.bottom() + os &&
ty + height() + table()->outerBorderBottom() > paintInfo.rect.y() - os)
paintCollapsedBorder(paintInfo.context, tx, ty, width(), height());
return;
}
RenderBlock::paint(paintInfo, tx, ty);
}
static EBorderStyle collapsedBorderStyle(EBorderStyle style)
{
if (style == OUTSET)
return GROOVE;
if (style == INSET)
return RIDGE;
return style;
}
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 (int 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];
int m_count;
};
static void addBorderStyle(RenderTableCell::CollapsedBorderStyles& borderStyles, CollapsedBorderValue borderValue)
{
if (!borderValue.exists())
return;
size_t count = borderStyles.size();
for (size_t i = 0; i < count; ++i)
if (borderStyles[i] == borderValue)
return;
borderStyles.append(borderValue);
}
void RenderTableCell::collectBorderStyles(CollapsedBorderStyles& borderStyles) const
{
bool rtl = table()->style()->direction() == RTL;
addBorderStyle(borderStyles, collapsedLeftBorder(rtl));
addBorderStyle(borderStyles, collapsedRightBorder(rtl));
addBorderStyle(borderStyles, collapsedTopBorder());
addBorderStyle(borderStyles, collapsedBottomBorder());
}
static int compareBorderStylesForQSort(const void* pa, const void* pb)
{
const CollapsedBorderValue* a = static_cast<const CollapsedBorderValue*>(pa);
const CollapsedBorderValue* b = static_cast<const CollapsedBorderValue*>(pb);
if (*a == *b)
return 0;
CollapsedBorderValue borderWithHigherPrecedence = compareBorders(*a, *b);
if (*a == borderWithHigherPrecedence)
return 1;
return -1;
}
void RenderTableCell::sortBorderStyles(CollapsedBorderStyles& borderStyles)
{
qsort(borderStyles.data(), borderStyles.size(), sizeof(CollapsedBorderValue),
compareBorderStylesForQSort);
}
void RenderTableCell::paintCollapsedBorder(GraphicsContext* graphicsContext, int tx, int ty, int w, int h)
{
if (!table()->currentBorderStyle())
return;
bool rtl = table()->style()->direction() == RTL;
CollapsedBorderValue leftVal = collapsedLeftBorder(rtl);
CollapsedBorderValue rightVal = collapsedRightBorder(rtl);
CollapsedBorderValue topVal = collapsedTopBorder();
CollapsedBorderValue bottomVal = collapsedBottomBorder();
// 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();
tx -= leftWidth / 2;
ty -= topWidth / 2;
w += leftWidth / 2 + (rightWidth + 1) / 2;
h += 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, tx, ty, tx + w, ty + topWidth, topStyle);
borders.addBorder(bottomVal, BSBottom, renderBottom, tx, ty + h - bottomWidth, tx + w, ty + h, bottomStyle);
borders.addBorder(leftVal, BSLeft, renderLeft, tx, ty, tx + leftWidth, ty + h, leftStyle);
borders.addBorder(rightVal, BSRight, renderRight, tx + w - rightWidth, ty, tx + w, ty + h, rightStyle);
for (CollapsedBorder* border = borders.nextBorder(); border; border = borders.nextBorder()) {
if (border->borderValue == *table()->currentBorderStyle())
drawLineForBoxSide(graphicsContext, border->x1, border->y1, border->x2, border->y2, border->side,
border->borderValue.color(), style()->color(), border->style, 0, 0);
}
}
void RenderTableCell::paintBackgroundsBehindCell(PaintInfo& paintInfo, int tx, int ty, RenderObject* backgroundObject)
{
if (!shouldPaintWithinRoot(paintInfo))
return;
if (!backgroundObject)
return;
if (style()->visibility() != VISIBLE)
return;
RenderTable* tableElt = table();
if (!tableElt->collapseBorders() && style()->emptyCells() == HIDE && !firstChild())
return;
if (backgroundObject != this) {
tx += x();
ty += y();
}
int w = width();
int h = height();
Color c = backgroundObject->style()->backgroundColor();
const FillLayer* bgLayer = backgroundObject->style()->backgroundLayers();
if (bgLayer->hasImage() || c.isValid()) {
// 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 == this || backgroundObject == parent()) && tableElt->collapseBorders();
if (shouldClip) {
IntRect clipRect(tx + borderLeft(), ty + borderTop(),
w - borderLeft() - borderRight(), h - borderTop() - borderBottom());
paintInfo.context->save();
paintInfo.context->clip(clipRect);
}
paintFillLayers(paintInfo, c, bgLayer, tx, ty, w, h);
if (shouldClip)
paintInfo.context->restore();
}
}
void RenderTableCell::paintBoxDecorations(PaintInfo& paintInfo, int tx, int ty)
{
if (!shouldPaintWithinRoot(paintInfo))
return;
RenderTable* tableElt = table();
if (!tableElt->collapseBorders() && style()->emptyCells() == HIDE && !firstChild())
return;
int w = width();
int h = height();
if (style()->boxShadow())
paintBoxShadow(paintInfo.context, tx, ty, w, h, style());
// Paint our cell background.
paintBackgroundsBehindCell(paintInfo, tx, ty, this);
if (!style()->hasBorder() || tableElt->collapseBorders())
return;
paintBorder(paintInfo.context, tx, ty, w, h, style());
}
void RenderTableCell::paintMask(PaintInfo& paintInfo, int tx, int ty)
{
if (style()->visibility() != VISIBLE || paintInfo.phase != PaintPhaseMask)
return;
RenderTable* tableElt = table();
if (!tableElt->collapseBorders() && style()->emptyCells() == HIDE && !firstChild())
return;
int w = width();
int h = height();
paintMaskImages(paintInfo, tx, ty, w, h);
}
} // namespace WebCore