WebCore/html/HTMLTableRowsCollection.cpp

   1 /*
   2  * Copyright (C) 2008 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 "HTMLTableRowsCollection.h"
  31
  32 #include "HTMLNames.h"
  33 #include "HTMLTableElement.h"
  34 #include "HTMLTableRowElement.h"
  35
  36 namespace WebCore {
  37
  38 using namespace HTMLNames;
  39
  40 static bool isInHead(Element* row)
  41 {
  42     return row->parent() && static_cast<Element*>(row->parent())->hasLocalName(theadTag);
  43 }
  44
  45 static bool isInBody(Element* row)
  46 {
  47     return row->parent() && static_cast<Element*>(row->parent())->hasLocalName(tbodyTag);
  48 }
  49
  50 static bool isInFoot(Element* row)
  51 {
  52     return row->parent() && static_cast<Element*>(row->parent())->hasLocalName(tfootTag);
  53 }
  54
  55 HTMLTableRowElement* HTMLTableRowsCollection::rowAfter(HTMLTableElement* table, HTMLTableRowElement* previous)
  56 {
  57     Node* child = 0;
  58
  59     // Start by looking for the next row in this section.
  60     // Continue only if there is none.
  61     if (previous && previous->parent() != table) {
  62         for (child = previous->nextSibling(); child; child = child->nextSibling()) {
  63             if (child->hasTagName(trTag))
  64                 return static_cast<HTMLTableRowElement*>(child);
  65         }
  66     }
  67
  68     // If still looking at head sections, find the first row in the next head section.
  69     if (!previous)
  70         child = table->firstChild();
  71     else if (isInHead(previous))
  72         child = previous->parent()->nextSibling();
  73     for (; child; child = child->nextSibling()) {
  74         if (child->hasTagName(theadTag)) {
  75             for (Node* grandchild = child->firstChild(); grandchild; grandchild = grandchild->nextSibling()) {
  76                 if (grandchild->hasTagName(trTag))
  77                     return static_cast<HTMLTableRowElement*>(grandchild);
  78             }
  79         }
  80     }
  81
  82     // If still looking at top level and bodies, find the next row in top level or the first in the next body section.
  83     if (!previous || isInHead(previous))
  84         child = table->firstChild();
  85     else if (previous->parent() == table)
  86         child = previous->nextSibling();
  87     else if (isInBody(previous))
  88         child = previous->parent()->nextSibling();
  89     for (; child; child = child->nextSibling()) {
  90         if (child->hasTagName(trTag))
  91             return static_cast<HTMLTableRowElement*>(child);
  92         if (child->hasTagName(tbodyTag)) {
  93             for (Node* grandchild = child->firstChild(); grandchild; grandchild = grandchild->nextSibling()) {
  94                 if (grandchild->hasTagName(trTag))
  95                     return static_cast<HTMLTableRowElement*>(grandchild);
  96             }
  97         }
  98     }
  99
 100     // Find the first row in the next foot section.
 101     if (!previous || !isInFoot(previous))
 102         child = table->firstChild();
 103     else
 104         child = previous->parent()->nextSibling();
 105     for (; child; child = child->nextSibling()) {
 106         if (child->hasTagName(tfootTag)) {
 107             for (Node* grandchild = child->firstChild(); grandchild; grandchild = grandchild->nextSibling()) {
 108                 if (grandchild->hasTagName(trTag))
 109                     return static_cast<HTMLTableRowElement*>(grandchild);
 110             }
 111         }
 112     }
 113
 114     return 0;
 115 }
 116
 117 HTMLTableRowElement* HTMLTableRowsCollection::lastRow(HTMLTableElement* table)
 118 {
 119     for (Node* child = table->lastChild(); child; child = child->previousSibling()) {
 120         if (child->hasTagName(tfootTag)) {
 121             for (Node* grandchild = child->lastChild(); grandchild; grandchild = grandchild->previousSibling()) {
 122                 if (grandchild->hasTagName(trTag))
 123                     return static_cast<HTMLTableRowElement*>(grandchild);
 124             }
 125         }
 126     }
 127
 128     for (Node* child = table->lastChild(); child; child = child->previousSibling()) {
 129         if (child->hasTagName(trTag))
 130             return static_cast<HTMLTableRowElement*>(child);
 131         if (child->hasTagName(tbodyTag)) {
 132             for (Node* grandchild = child->lastChild(); grandchild; grandchild = grandchild->previousSibling()) {
 133                 if (grandchild->hasTagName(trTag))
 134                     return static_cast<HTMLTableRowElement*>(grandchild);
 135             }
 136         }
 137     }
 138
 139     for (Node* child = table->lastChild(); child; child = child->previousSibling()) {
 140         if (child->hasTagName(theadTag)) {
 141             for (Node* grandchild = child->lastChild(); grandchild; grandchild = grandchild->previousSibling()) {
 142                 if (grandchild->hasTagName(trTag))
 143                     return static_cast<HTMLTableRowElement*>(grandchild);
 144             }
 145         }
 146     }
 147
 148     return 0;
 149 }
 150
 151 HTMLTableRowsCollection::HTMLTableRowsCollection(PassRefPtr<HTMLTableElement> table)
 152     : HTMLCollection(table, OtherCollection, 0)
 153 {
 154 }
 155
 156 PassRefPtr<HTMLTableRowsCollection> HTMLTableRowsCollection::create(PassRefPtr<HTMLTableElement> table)
 157 {
 158     return adoptRef(new HTMLTableRowsCollection(table));
 159 }
 160
 161 Element* HTMLTableRowsCollection::itemAfter(Element* previous) const
 162 {
 163     ASSERT(!previous || previous->hasLocalName(trTag));
 164     return rowAfter(static_cast<HTMLTableElement*>(base()), static_cast<HTMLTableRowElement*>(previous));
 165 }
 166
 167 }