diff -r 000000000000 -r dd21522fd290 webengine/osswebengine/WebCore/rendering/RenderTableCell.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/webengine/osswebengine/WebCore/rendering/RenderTableCell.cpp Mon Mar 30 12:54:55 2009 +0300 @@ -0,0 +1,873 @@ +/** + * 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 "GraphicsContext.h" +#include "HTMLNames.h" +#include "HTMLTableCellElement.h" +#include "RenderTableCol.h" +#include "RenderView.h" +#include "TextStream.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_topExtra(0) + , m_bottomExtra(0) + , m_widthChanged(false) + , m_percentageHeight(0) +{ + updateFromElement(); +} + +void RenderTableCell::destroy() +{ + RenderTableSection* recalcSection = parent() ? section() : 0; + + RenderBlock::destroy(); + + if (recalcSection) + recalcSection->setNeedsCellRecalc(); +} + +void RenderTableCell::updateFromElement() +{ + Node* node = element(); + if (node && (node->hasTagName(tdTag) || node->hasTagName(thTag))) { + HTMLTableCellElement* tc = static_cast(node); + 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 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 (element() && style()->autoWrap()) { + // See if nowrap was set. + Length w = styleOrColWidth(); + String nowrap = static_cast(element())->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::setWidth(int width) +{ + if (width != m_width) { + m_width = width; + m_widthChanged = true; + } +} + +void RenderTableCell::layout() +{ + layoutBlock(m_widthChanged); + m_widthChanged = false; +} + +IntRect RenderTableCell::absoluteClippedOverflowRect() +{ + // 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()) { + 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) - borderTopExtra()); + IntRect r(-left, -borderTopExtra() - top, left + max(width() + right, overflowWidth(false)), borderTopExtra() + top + max(height() + bottom + borderBottomExtra(), overflowHeight(false))); + + if (RenderView* v = view()) + r.move(v->layoutDelta()); + + computeAbsoluteRepaintRect(r); + return r; + } + return RenderBlock::absoluteClippedOverflowRect(); +} + +void RenderTableCell::computeAbsoluteRepaintRect(IntRect& r, bool fixed) +{ + r.setY(r.y() + m_topExtra); + RenderView* v = view(); + if (!v || !v->layoutState()) + r.move(-parent()->xPos(), -parent()->yPos()); // Rows are in the same coordinate space, so don't add their offset in. + RenderBlock::computeAbsoluteRepaintRect(r, fixed); +} + +bool RenderTableCell::absolutePosition(int& xPos, int& yPos, bool fixed) const +{ + bool result = RenderBlock::absolutePosition(xPos, yPos, fixed); + RenderView* v = view(); + if (!v || !v->layoutState()) { + xPos -= parent()->xPos(); // Rows are in the same coordinate space, so don't add their offset in. + yPos -= parent()->yPos(); + } + return result; +} + +short RenderTableCell::baselinePosition(bool /*firstLine*/, bool /*isRootLineBox*/) const +{ + RenderObject* o = firstChild(); + int offset = paddingTop() + borderTop(); + + if (!o) + return offset + contentHeight(); + while (o->firstChild() && !o->isReplaced()) { + if (!o->isInline()) + offset += o->paddingTop() + o->borderTop(); + o = o->firstChild(); + } + + if (!o->isInline()) + return paddingTop() + borderTop() + contentHeight(); + + offset += o->baselinePosition(true); + return offset; +} + +void RenderTableCell::setStyle(RenderStyle* newStyle) +{ + if (parent() && section() && style() && style()->height() != newStyle->height()) + section()->setNeedsCellRecalc(); + + newStyle->setDisplay(TABLE_CELL); + + if (newStyle->whiteSpace() == KHTML_NOWRAP) { + // Figure out if we are really nowrapping or if we should just + // use normal instead. If the width of the cell is fixed, then + // we don't actually use NOWRAP. + if (newStyle->width().isFixed()) + newStyle->setWhiteSpace(NORMAL); + else + newStyle->setWhiteSpace(NOWRAP); + } + + RenderBlock::setStyle(newStyle); + setHasBoxDecorations(true); +} + +bool RenderTableCell::requiresLayer() +{ + return isPositioned() || isTransparent() || hasOverflowClip(); +} + +// 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 = compareBorders(result, CollapsedBorderValue(&prevCell->style()->borderRight(), BCELL)); + 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(§ion()->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 = compareBorders(result, CollapsedBorderValue(&colElt->style()->borderRight(), BCOL)); + 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 = 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(§ion()->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 = 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(result, CollapsedBorderValue(&prevCell->style()->borderBottom(), BCELL)); + 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(result, CollapsedBorderValue(&prevRow->style()->borderBottom(), BROW)); + 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(result, CollapsedBorderValue(&currSection->style()->borderBottom(), BROWGROUP)); + 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(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) +{ + tx += m_x; + ty += m_y; + + // check if we need to do anything at all... + int os = 2 * maximalOutlineSize(paintInfo.phase); + + if (paintInfo.phase == PaintPhaseCollapsedTableBorders && style()->visibility() == VISIBLE) { + if (ty - table()->outerBorderTop() >= paintInfo.rect.bottom() + os || + ty + m_topExtra + m_height + m_bottomExtra + table()->outerBorderBottom() <= paintInfo.rect.y() - os) + return; + int w = width(); + int h = height() + borderTopExtra() + borderBottomExtra(); + paintCollapsedBorder(paintInfo.context, tx, ty, w, h); + } else { + if (ty + overflowTop(false) >= paintInfo.rect.bottom() + os || ty + m_topExtra + overflowHeight(false) + m_bottomExtra <= paintInfo.rect.y() - os) + return; + RenderBlock::paintObject(paintInfo, tx, ty + m_topExtra); + } +} + +static EBorderStyle collapsedBorderStyle(EBorderStyle style) +{ + if (style == OUTSET) + return GROOVE; + if (style == INSET) + return RIDGE; + return style; +} + +struct CollapsedBorder { + CollapsedBorderValue borderValue; + RenderObject::BorderSide 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, RenderObject::BorderSide 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(pa); + const CollapsedBorderValue* b = static_cast(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()) + drawBorder(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 (!backgroundObject) + return; + + if (style()->visibility() != VISIBLE) + return; + + RenderTable* tableElt = table(); + if (!tableElt->collapseBorders() && style()->emptyCells() == HIDE && !firstChild()) + return; + + if (backgroundObject != this) { + tx += m_x; + ty += m_y + m_topExtra; + } + + int w = width(); + int h = height() + borderTopExtra() + borderBottomExtra(); + ty -= borderTopExtra(); + + int my = max(ty, paintInfo.rect.y()); + int end = min(paintInfo.rect.bottom(), ty + h); + int mh = end - my; + + Color c = backgroundObject->style()->backgroundColor(); + const BackgroundLayer* 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()); +#if PLATFORM(SYMBIAN) + // make sure we don't draw outside the current rendering area. + clipRect.intersect(paintInfo.rect); +#endif + paintInfo.context->save(); + paintInfo.context->clip(clipRect); + } + paintBackground(paintInfo.context, c, bgLayer, my, mh, tx, ty, w, h); + if (shouldClip) + paintInfo.context->restore(); + } +} + +void RenderTableCell::paintBoxDecorations(PaintInfo& paintInfo, int tx, int ty) +{ + RenderTable* tableElt = table(); + if (!tableElt->collapseBorders() && style()->emptyCells() == HIDE && !firstChild()) + return; + + int w = width(); + int h = height() + borderTopExtra() + borderBottomExtra(); + + if (style()->boxShadow()) + paintBoxShadow(paintInfo.context, tx, ty - borderTopExtra(), w, h, style()); + + // Paint our cell background. + paintBackgroundsBehindCell(paintInfo, tx, ty, this); + + if (!style()->hasBorder() || tableElt->collapseBorders()) + return; + + ty -= borderTopExtra(); + paintBorder(paintInfo.context, tx, ty, w, h, style()); +} + +#ifndef NDEBUG +void RenderTableCell::dump(TextStream* stream, DeprecatedString ind) const +{ + *stream << " row=" << row(); + *stream << " col=" << col(); + *stream << " rSpan=" << rowSpan(); + *stream << " cSpan=" << colSpan(); + + RenderBlock::dump(stream,ind); +} +#endif + +} // namespace WebCore