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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 blink {
     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::trace(Visitor* visitor)
     48 {
     49     visitor->trace(m_children);
     50     RenderBox::trace(visitor);
     51 }
     52 
     53 void RenderTableCol::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
     54 {
     55     RenderBox::styleDidChange(diff, oldStyle);
     56 
     57     // If border was changed, notify table.
     58     if (parent()) {
     59         RenderTable* table = this->table();
     60         if (table && !table->selfNeedsLayout() && !table->normalChildNeedsLayout() && oldStyle && oldStyle->border() != style()->border())
     61             table->invalidateCollapsedBorders();
     62     }
     63 }
     64 
     65 void RenderTableCol::updateFromElement()
     66 {
     67     unsigned oldSpan = m_span;
     68     Node* n = node();
     69     if (isHTMLTableColElement(n)) {
     70         HTMLTableColElement& tc = toHTMLTableColElement(*n);
     71         m_span = tc.span();
     72     } else
     73         m_span = !(style() && style()->display() == TABLE_COLUMN_GROUP);
     74     if (m_span != oldSpan && style() && parent())
     75         setNeedsLayoutAndPrefWidthsRecalcAndFullPaintInvalidation();
     76 }
     77 
     78 void RenderTableCol::insertedIntoTree()
     79 {
     80     RenderBox::insertedIntoTree();
     81     table()->addColumn(this);
     82 }
     83 
     84 void RenderTableCol::willBeRemovedFromTree()
     85 {
     86     RenderBox::willBeRemovedFromTree();
     87     table()->removeColumn(this);
     88 }
     89 
     90 bool RenderTableCol::isChildAllowed(RenderObject* child, RenderStyle* style) const
     91 {
     92     // We cannot use isTableColumn here as style() may return 0.
     93     return child->isRenderTableCol() && style->display() == TABLE_COLUMN;
     94 }
     95 
     96 bool RenderTableCol::canHaveChildren() const
     97 {
     98     // Cols cannot have children. This is actually necessary to fix a bug
     99     // with libraries.uc.edu, which makes a <p> be a table-column.
    100     return isTableColumnGroup();
    101 }
    102 
    103 LayoutRect RenderTableCol::clippedOverflowRectForPaintInvalidation(const RenderLayerModelObject* paintInvalidationContainer, const PaintInvalidationState* paintInvalidationState) const
    104 {
    105     // For now, just paint invalidate the whole table.
    106     // FIXME: Find a better way to do this, e.g., need to paint invalidate all the cells that we
    107     // might have propagated a background color or borders into.
    108     // FIXME: check for paintInvalidationContainer each time here?
    109 
    110     RenderTable* parentTable = table();
    111     if (!parentTable)
    112         return LayoutRect();
    113     return parentTable->clippedOverflowRectForPaintInvalidation(paintInvalidationContainer, paintInvalidationState);
    114 }
    115 
    116 void RenderTableCol::imageChanged(WrappedImagePtr, const IntRect*)
    117 {
    118     // FIXME: Issue paint invalidation of only the rect the image paints in.
    119     setShouldDoFullPaintInvalidation(true);
    120 }
    121 
    122 void RenderTableCol::clearPreferredLogicalWidthsDirtyBits()
    123 {
    124     clearPreferredLogicalWidthsDirty();
    125 
    126     for (RenderObject* child = firstChild(); child; child = child->nextSibling())
    127         child->clearPreferredLogicalWidthsDirty();
    128 }
    129 
    130 RenderTable* RenderTableCol::table() const
    131 {
    132     RenderObject* table = parent();
    133     if (table && !table->isTable())
    134         table = table->parent();
    135     return table && table->isTable() ? toRenderTable(table) : 0;
    136 }
    137 
    138 RenderTableCol* RenderTableCol::enclosingColumnGroup() const
    139 {
    140     if (!parent()->isRenderTableCol())
    141         return 0;
    142 
    143     RenderTableCol* parentColumnGroup = toRenderTableCol(parent());
    144     ASSERT(parentColumnGroup->isTableColumnGroup());
    145     ASSERT(isTableColumn());
    146     return parentColumnGroup;
    147 }
    148 
    149 RenderTableCol* RenderTableCol::nextColumn() const
    150 {
    151     // If |this| is a column-group, the next column is the colgroup's first child column.
    152     if (RenderObject* firstChild = this->firstChild())
    153         return toRenderTableCol(firstChild);
    154 
    155     // Otherwise it's the next column along.
    156     RenderObject* next = nextSibling();
    157 
    158     // 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.
    159     if (!next && parent()->isRenderTableCol())
    160         next = parent()->nextSibling();
    161 
    162     for (; next && !next->isRenderTableCol(); next = next->nextSibling()) { }
    163 
    164     return toRenderTableCol(next);
    165 }
    166 
    167 const BorderValue& RenderTableCol::borderAdjoiningCellStartBorder(const RenderTableCell*) const
    168 {
    169     return style()->borderStart();
    170 }
    171 
    172 const BorderValue& RenderTableCol::borderAdjoiningCellEndBorder(const RenderTableCell*) const
    173 {
    174     return style()->borderEnd();
    175 }
    176 
    177 const BorderValue& RenderTableCol::borderAdjoiningCellBefore(const RenderTableCell* cell) const
    178 {
    179     ASSERT_UNUSED(cell, table()->colElement(cell->col() + cell->colSpan()) == this);
    180     return style()->borderStart();
    181 }
    182 
    183 const BorderValue& RenderTableCol::borderAdjoiningCellAfter(const RenderTableCell* cell) const
    184 {
    185     ASSERT_UNUSED(cell, table()->colElement(cell->col() - 1) == this);
    186     return style()->borderEnd();
    187 }
    188 
    189 }
    190