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 }