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      1 /**
      2  * Copyright (C) 1997 Martin Jones (mjones (at) kde.org)
      3  *           (C) 1997 Torben Weis (weis (at) kde.org)
      4  *           (C) 1998 Waldo Bastian (bastian (at) kde.org)
      5  *           (C) 1999 Lars Knoll (knoll (at) kde.org)
      6  *           (C) 1999 Antti Koivisto (koivisto (at) kde.org)
      7  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
      8  *
      9  * This library is free software; you can redistribute it and/or
     10  * modify it under the terms of the GNU Library General Public
     11  * License as published by the Free Software Foundation; either
     12  * version 2 of the License, or (at your option) any later version.
     13  *
     14  * This library is distributed in the hope that it will be useful,
     15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     17  * Library General Public License for more details.
     18  *
     19  * You should have received a copy of the GNU Library General Public License
     20  * along with this library; see the file COPYING.LIB.  If not, write to
     21  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     22  * Boston, MA 02110-1301, USA.
     23  */
     24 
     25 #include "config.h"
     26 #include "RenderTableRow.h"
     27 
     28 #include "CachedImage.h"
     29 #include "Document.h"
     30 #include "HTMLNames.h"
     31 #include "PaintInfo.h"
     32 #include "RenderTableCell.h"
     33 #include "RenderView.h"
     34 
     35 namespace WebCore {
     36 
     37 using namespace HTMLNames;
     38 
     39 RenderTableRow::RenderTableRow(Node* node)
     40     : RenderBox(node)
     41 {
     42     // init RenderObject attributes
     43     setInline(false);   // our object is not Inline
     44 }
     45 
     46 void RenderTableRow::destroy()
     47 {
     48     RenderTableSection* recalcSection = section();
     49 
     50     RenderBox::destroy();
     51 
     52     if (recalcSection)
     53         recalcSection->setNeedsCellRecalc();
     54 }
     55 
     56 void RenderTableRow::styleWillChange(StyleDifference diff, const RenderStyle* newStyle)
     57 {
     58     if (section() && style() && style()->logicalHeight() != newStyle->logicalHeight())
     59         section()->setNeedsCellRecalc();
     60 
     61     ASSERT(newStyle->display() == TABLE_ROW);
     62 
     63     RenderBox::styleWillChange(diff, newStyle);
     64 }
     65 
     66 void RenderTableRow::updateBeforeAndAfterContent()
     67 {
     68     if (!isAnonymous() && document()->usesBeforeAfterRules()) {
     69         children()->updateBeforeAfterContent(this, BEFORE);
     70         children()->updateBeforeAfterContent(this, AFTER);
     71     }
     72 }
     73 
     74 void RenderTableRow::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
     75 {
     76     RenderBox::styleDidChange(diff, oldStyle);
     77 
     78     if (parent())
     79         updateBeforeAndAfterContent();
     80 
     81 }
     82 
     83 void RenderTableRow::addChild(RenderObject* child, RenderObject* beforeChild)
     84 {
     85     // Make sure we don't append things after :after-generated content if we have it.
     86     if (!beforeChild && isAfterContent(lastChild()))
     87         beforeChild = lastChild();
     88 
     89     if (!child->isTableCell()) {
     90         RenderObject* last = beforeChild;
     91         if (!last)
     92             last = lastChild();
     93         if (last && last->isAnonymous() && last->isTableCell()) {
     94             if (beforeChild == last)
     95                 beforeChild = last->firstChild();
     96             last->addChild(child, beforeChild);
     97             return;
     98         }
     99 
    100         // If beforeChild is inside an anonymous cell, insert into the cell.
    101         if (last && !last->isTableCell() && last->parent() && last->parent()->isAnonymous()) {
    102             last->parent()->addChild(child, beforeChild);
    103             return;
    104         }
    105 
    106         RenderTableCell* cell = new (renderArena()) RenderTableCell(document() /* anonymous object */);
    107         RefPtr<RenderStyle> newStyle = RenderStyle::create();
    108         newStyle->inheritFrom(style());
    109         newStyle->setDisplay(TABLE_CELL);
    110         cell->setStyle(newStyle.release());
    111         addChild(cell, beforeChild);
    112         cell->addChild(child);
    113         return;
    114     }
    115 
    116     // If the next renderer is actually wrapped in an anonymous table cell, we need to go up and find that.
    117     while (beforeChild && beforeChild->parent() != this)
    118         beforeChild = beforeChild->parent();
    119 
    120     RenderTableCell* cell = toRenderTableCell(child);
    121 
    122     // Generated content can result in us having a null section so make sure to null check our parent.
    123     if (parent())
    124         section()->addCell(cell, this);
    125 
    126     ASSERT(!beforeChild || beforeChild->isTableCell());
    127     RenderBox::addChild(cell, beforeChild);
    128 
    129     if (beforeChild || nextSibling())
    130         section()->setNeedsCellRecalc();
    131 }
    132 
    133 void RenderTableRow::layout()
    134 {
    135     ASSERT(needsLayout());
    136 
    137     // Table rows do not add translation.
    138     LayoutStateMaintainer statePusher(view(), this, IntSize(), style()->isFlippedBlocksWritingMode());
    139 
    140     bool paginated = view()->layoutState()->isPaginated();
    141 
    142     for (RenderObject* child = firstChild(); child; child = child->nextSibling()) {
    143         if (child->isTableCell()) {
    144             RenderTableCell* cell = toRenderTableCell(child);
    145             if (!cell->needsLayout() && paginated && view()->layoutState()->pageLogicalHeight() && view()->layoutState()->pageLogicalOffset(cell->logicalTop()) != cell->pageLogicalOffset())
    146                 cell->setChildNeedsLayout(true, false);
    147 
    148             if (child->needsLayout()) {
    149                 cell->computeBlockDirectionMargins(table());
    150                 cell->layout();
    151             }
    152         }
    153     }
    154 
    155     // We only ever need to repaint if our cells didn't, which menas that they didn't need
    156     // layout, so we know that our bounds didn't change. This code is just making up for
    157     // the fact that we did not repaint in setStyle() because we had a layout hint.
    158     // We cannot call repaint() because our clippedOverflowRectForRepaint() is taken from the
    159     // parent table, and being mid-layout, that is invalid. Instead, we repaint our cells.
    160     if (selfNeedsLayout() && checkForRepaintDuringLayout()) {
    161         for (RenderObject* child = firstChild(); child; child = child->nextSibling()) {
    162             if (child->isTableCell())
    163                 child->repaint();
    164         }
    165     }
    166 
    167     statePusher.pop();
    168     // RenderTableSection::layoutRows will set our logical height and width later, so it calls updateLayerTransform().
    169     setNeedsLayout(false);
    170 }
    171 
    172 IntRect RenderTableRow::clippedOverflowRectForRepaint(RenderBoxModelObject* repaintContainer)
    173 {
    174     ASSERT(parent());
    175 
    176     if (repaintContainer == this)
    177         return RenderBox::clippedOverflowRectForRepaint(repaintContainer);
    178 
    179     // For now, just repaint the whole table.
    180     // FIXME: Find a better way to do this, e.g., need to repaint all the cells that we
    181     // might have propagated a background color into.
    182     // FIXME: do repaintContainer checks here
    183     if (RenderTable* parentTable = table())
    184         return parentTable->clippedOverflowRectForRepaint(repaintContainer);
    185 
    186     return IntRect();
    187 }
    188 
    189 // Hit Testing
    190 bool RenderTableRow::nodeAtPoint(const HitTestRequest& request, HitTestResult& result, int x, int y, int tx, int ty, HitTestAction action)
    191 {
    192     // Table rows cannot ever be hit tested.  Effectively they do not exist.
    193     // Just forward to our children always.
    194     for (RenderObject* child = lastChild(); child; child = child->previousSibling()) {
    195         // FIXME: We have to skip over inline flows, since they can show up inside table rows
    196         // at the moment (a demoted inline <form> for example). If we ever implement a
    197         // table-specific hit-test method (which we should do for performance reasons anyway),
    198         // then we can remove this check.
    199         if (child->isTableCell() && !toRenderBox(child)->hasSelfPaintingLayer()) {
    200             IntPoint cellPoint = flipForWritingMode(toRenderTableCell(child), IntPoint(tx, ty), ParentToChildFlippingAdjustment);
    201             if (child->nodeAtPoint(request, result, x, y, cellPoint.x(), cellPoint.y(), action)) {
    202                 updateHitTestResult(result, IntPoint(x - cellPoint.x(), y - cellPoint.y()));
    203                 return true;
    204             }
    205         }
    206     }
    207 
    208     return false;
    209 }
    210 
    211 void RenderTableRow::paint(PaintInfo& paintInfo, int tx, int ty)
    212 {
    213     ASSERT(hasSelfPaintingLayer());
    214     if (!layer())
    215         return;
    216     for (RenderObject* child = firstChild(); child; child = child->nextSibling()) {
    217         if (child->isTableCell()) {
    218             // Paint the row background behind the cell.
    219             if (paintInfo.phase == PaintPhaseBlockBackground || paintInfo.phase == PaintPhaseChildBlockBackground) {
    220                 RenderTableCell* cell = toRenderTableCell(child);
    221                 cell->paintBackgroundsBehindCell(paintInfo, tx, ty, this);
    222             }
    223             if (!toRenderBox(child)->hasSelfPaintingLayer())
    224                 child->paint(paintInfo, tx, ty);
    225         }
    226     }
    227 }
    228 
    229 void RenderTableRow::imageChanged(WrappedImagePtr, const IntRect*)
    230 {
    231     // FIXME: Examine cells and repaint only the rect the image paints in.
    232     repaint();
    233 }
    234 
    235 } // namespace WebCore
    236