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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, 2009 Apple Inc. All rights reserved.
      8  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
      9  *
     10  * This library is free software; you can redistribute it and/or
     11  * modify it under the terms of the GNU Library General Public
     12  * License as published by the Free Software Foundation; either
     13  * version 2 of the License, or (at your option) any later version.
     14  *
     15  * This library is distributed in the hope that it will be useful,
     16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     18  * Library General Public License for more details.
     19  *
     20  * You should have received a copy of the GNU Library General Public License
     21  * along with this library; see the file COPYING.LIB.  If not, write to
     22  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     23  * Boston, MA 02110-1301, USA.
     24  */
     25 
     26 #include "config.h"
     27 #include "core/rendering/RenderTableCol.h"
     28 
     29 #include "core/HTMLNames.h"
     30 #include "core/html/HTMLTableColElement.h"
     31 #include "core/rendering/RenderTable.h"
     32 #include "core/rendering/RenderTableCell.h"
     33 
     34 namespace WebCore {
     35 
     36 using namespace HTMLNames;
     37 
     38 RenderTableCol::RenderTableCol(Element* element)
     39     : RenderBox(element)
     40     , m_span(1)
     41 {
     42     // init RenderObject attributes
     43     setInline(true); // our object is not Inline
     44     updateFromElement();
     45 }
     46 
     47 void RenderTableCol::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
     48 {
     49     RenderBox::styleDidChange(diff, oldStyle);
     50 
     51     // If border was changed, notify table.
     52     if (parent()) {
     53         RenderTable* table = this->table();
     54         if (table && !table->selfNeedsLayout() && !table->normalChildNeedsLayout() && oldStyle && oldStyle->border() != style()->border())
     55             table->invalidateCollapsedBorders();
     56     }
     57 }
     58 
     59 void RenderTableCol::updateFromElement()
     60 {
     61     unsigned oldSpan = m_span;
     62     Node* n = node();
     63     if (isHTMLTableColElement(n)) {
     64         HTMLTableColElement& tc = toHTMLTableColElement(*n);
     65         m_span = tc.span();
     66     } else
     67         m_span = !(style() && style()->display() == TABLE_COLUMN_GROUP);
     68     if (m_span != oldSpan && style() && parent())
     69         setNeedsLayoutAndPrefWidthsRecalcAndFullPaintInvalidation();
     70 }
     71 
     72 void RenderTableCol::insertedIntoTree()
     73 {
     74     RenderBox::insertedIntoTree();
     75     table()->addColumn(this);
     76 }
     77 
     78 void RenderTableCol::willBeRemovedFromTree()
     79 {
     80     RenderBox::willBeRemovedFromTree();
     81     table()->removeColumn(this);
     82 }
     83 
     84 bool RenderTableCol::isChildAllowed(RenderObject* child, RenderStyle* style) const
     85 {
     86     // We cannot use isTableColumn here as style() may return 0.
     87     return child->isRenderTableCol() && style->display() == TABLE_COLUMN;
     88 }
     89 
     90 bool RenderTableCol::canHaveChildren() const
     91 {
     92     // Cols cannot have children. This is actually necessary to fix a bug
     93     // with libraries.uc.edu, which makes a <p> be a table-column.
     94     return isTableColumnGroup();
     95 }
     96 
     97 LayoutRect RenderTableCol::clippedOverflowRectForPaintInvalidation(const RenderLayerModelObject* paintInvalidationContainer) const
     98 {
     99     // For now, just repaint the whole table.
    100     // FIXME: Find a better way to do this, e.g., need to repaint all the cells that we
    101     // might have propagated a background color or borders into.
    102     // FIXME: check for paintInvalidationContainer each time here?
    103 
    104     RenderTable* parentTable = table();
    105     if (!parentTable)
    106         return LayoutRect();
    107     return parentTable->clippedOverflowRectForPaintInvalidation(paintInvalidationContainer);
    108 }
    109 
    110 void RenderTableCol::imageChanged(WrappedImagePtr, const IntRect*)
    111 {
    112     // FIXME: Repaint only the rect the image paints in.
    113     paintInvalidationForWholeRenderer();
    114 }
    115 
    116 void RenderTableCol::clearPreferredLogicalWidthsDirtyBits()
    117 {
    118     clearPreferredLogicalWidthsDirty();
    119 
    120     for (RenderObject* child = firstChild(); child; child = child->nextSibling())
    121         child->clearPreferredLogicalWidthsDirty();
    122 }
    123 
    124 RenderTable* RenderTableCol::table() const
    125 {
    126     RenderObject* table = parent();
    127     if (table && !table->isTable())
    128         table = table->parent();
    129     return table && table->isTable() ? toRenderTable(table) : 0;
    130 }
    131 
    132 RenderTableCol* RenderTableCol::enclosingColumnGroup() const
    133 {
    134     if (!parent()->isRenderTableCol())
    135         return 0;
    136 
    137     RenderTableCol* parentColumnGroup = toRenderTableCol(parent());
    138     ASSERT(parentColumnGroup->isTableColumnGroup());
    139     ASSERT(isTableColumn());
    140     return parentColumnGroup;
    141 }
    142 
    143 RenderTableCol* RenderTableCol::nextColumn() const
    144 {
    145     // If |this| is a column-group, the next column is the colgroup's first child column.
    146     if (RenderObject* firstChild = this->firstChild())
    147         return toRenderTableCol(firstChild);
    148 
    149     // Otherwise it's the next column along.
    150     RenderObject* next = nextSibling();
    151 
    152     // Failing that, the child is the last column in a column-group, so the next column is the next column/column-group after its column-group.
    153     if (!next && parent()->isRenderTableCol())
    154         next = parent()->nextSibling();
    155 
    156     for (; next && !next->isRenderTableCol(); next = next->nextSibling()) { }
    157 
    158     return toRenderTableCol(next);
    159 }
    160 
    161 const BorderValue& RenderTableCol::borderAdjoiningCellStartBorder(const RenderTableCell*) const
    162 {
    163     return style()->borderStart();
    164 }
    165 
    166 const BorderValue& RenderTableCol::borderAdjoiningCellEndBorder(const RenderTableCell*) const
    167 {
    168     return style()->borderEnd();
    169 }
    170 
    171 const BorderValue& RenderTableCol::borderAdjoiningCellBefore(const RenderTableCell* cell) const
    172 {
    173     ASSERT_UNUSED(cell, table()->colElement(cell->col() + cell->colSpan()) == this);
    174     return style()->borderStart();
    175 }
    176 
    177 const BorderValue& RenderTableCol::borderAdjoiningCellAfter(const RenderTableCell* cell) const
    178 {
    179     ASSERT_UNUSED(cell, table()->colElement(cell->col() - 1) == this);
    180     return style()->borderEnd();
    181 }
    182 
    183 }
    184