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      1 /*
      2  * Copyright (C) 2009 Apple Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  *
      8  * 1.  Redistributions of source code must retain the above copyright
      9  *     notice, this list of conditions and the following disclaimer.
     10  * 2.  Redistributions in binary form must reproduce the above copyright
     11  *     notice, this list of conditions and the following disclaimer in the
     12  *     documentation and/or other materials provided with the distribution.
     13  * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
     14  *     its contributors may be used to endorse or promote products derived
     15  *     from this software without specific prior written permission.
     16  *
     17  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
     18  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     19  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     20  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
     21  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     22  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     23  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
     24  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 
     29 #include "config.h"
     30 #include "core/accessibility/AXARIAGridCell.h"
     31 
     32 #include "core/accessibility/AXTable.h"
     33 #include "core/accessibility/AXTableRow.h"
     34 
     35 
     36 namespace blink {
     37 
     38 AXARIAGridCell::AXARIAGridCell(RenderObject* renderer)
     39     : AXTableCell(renderer)
     40 {
     41 }
     42 
     43 AXARIAGridCell::~AXARIAGridCell()
     44 {
     45 }
     46 
     47 PassRefPtr<AXARIAGridCell> AXARIAGridCell::create(RenderObject* renderer)
     48 {
     49     return adoptRef(new AXARIAGridCell(renderer));
     50 }
     51 
     52 AXObject* AXARIAGridCell::parentTable() const
     53 {
     54     AXObject* parent = parentObjectUnignored();
     55     if (!parent)
     56         return 0;
     57 
     58     if (parent->isAXTable())
     59         return parent;
     60 
     61     // It could happen that we hadn't reached the parent table yet (in
     62     // case objects for rows were not ignoring accessibility) so for
     63     // that reason we need to run parentObjectUnignored once again.
     64     parent = parent->parentObjectUnignored();
     65     if (!parent || !parent->isAXTable())
     66         return 0;
     67 
     68     return parent;
     69 }
     70 
     71 void AXARIAGridCell::rowIndexRange(pair<unsigned, unsigned>& rowRange)
     72 {
     73     AXObject* parent = parentObjectUnignored();
     74     if (!parent)
     75         return;
     76 
     77     if (parent->isTableRow()) {
     78         // We already got a table row, use its API.
     79         rowRange.first = toAXTableRow(parent)->rowIndex();
     80     } else if (parent->isAXTable()) {
     81         // We reached the parent table, so we need to inspect its
     82         // children to determine the row index for the cell in it.
     83         unsigned columnCount = toAXTable(parent)->columnCount();
     84         if (!columnCount)
     85             return;
     86 
     87         AccessibilityChildrenVector siblings = parent->children();
     88         unsigned childrenSize = siblings.size();
     89         for (unsigned k = 0; k < childrenSize; ++k) {
     90             if (siblings[k].get() == this) {
     91                 rowRange.first = k / columnCount;
     92                 break;
     93             }
     94         }
     95     }
     96 
     97     // as far as I can tell, grid cells cannot span rows
     98     rowRange.second = 1;
     99 }
    100 
    101 void AXARIAGridCell::columnIndexRange(pair<unsigned, unsigned>& columnRange)
    102 {
    103     AXObject* parent = parentObjectUnignored();
    104     if (!parent)
    105         return;
    106 
    107     if (!parent->isTableRow() && !parent->isAXTable())
    108         return;
    109 
    110     AccessibilityChildrenVector siblings = parent->children();
    111     unsigned childrenSize = siblings.size();
    112     for (unsigned k = 0; k < childrenSize; ++k) {
    113         if (siblings[k].get() == this) {
    114             columnRange.first = k;
    115             break;
    116         }
    117     }
    118 
    119     // as far as I can tell, grid cells cannot span columns
    120     columnRange.second = 1;
    121 }
    122 
    123 } // namespace blink
    124