1 /* 2 * Copyright (C) 2008, 2011, 2012 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/html/HTMLTableRowsCollection.h" 31 32 #include "core/HTMLNames.h" 33 #include "core/dom/ElementTraversal.h" 34 #include "core/html/HTMLTableElement.h" 35 #include "core/html/HTMLTableRowElement.h" 36 37 namespace WebCore { 38 39 using namespace HTMLNames; 40 41 static bool isInHead(Element* row) 42 { 43 return row->parentNode() && toElement(row->parentNode())->hasLocalName(theadTag); 44 } 45 46 static bool isInBody(Element* row) 47 { 48 return row->parentNode() && toElement(row->parentNode())->hasLocalName(tbodyTag); 49 } 50 51 static bool isInFoot(Element* row) 52 { 53 return row->parentNode() && toElement(row->parentNode())->hasLocalName(tfootTag); 54 } 55 56 HTMLTableRowElement* HTMLTableRowsCollection::rowAfter(HTMLTableElement& table, HTMLTableRowElement* previous) 57 { 58 // Start by looking for the next row in this section. 59 // Continue only if there is none. 60 if (previous && previous->parentNode() != table) { 61 if (HTMLTableRowElement* row = Traversal<HTMLTableRowElement>::nextSibling(*previous)) 62 return row; 63 } 64 65 // If still looking at head sections, find the first row in the next head section. 66 HTMLElement* child = 0; 67 if (!previous) 68 child = Traversal<HTMLElement>::firstChild(table); 69 else if (isInHead(previous)) 70 child = Traversal<HTMLElement>::nextSibling(*previous->parentNode()); 71 for (; child; child = Traversal<HTMLElement>::nextSibling(*child)) { 72 if (child->hasLocalName(theadTag)) { 73 if (HTMLTableRowElement* row = Traversal<HTMLTableRowElement>::firstChild(*child)) 74 return row; 75 } 76 } 77 78 // If still looking at top level and bodies, find the next row in top level or the first in the next body section. 79 if (!previous || isInHead(previous)) 80 child = Traversal<HTMLElement>::firstChild(table); 81 else if (previous->parentNode() == table) 82 child = Traversal<HTMLElement>::nextSibling(*previous); 83 else if (isInBody(previous)) 84 child = Traversal<HTMLElement>::nextSibling(*previous->parentNode()); 85 for (; child; child = Traversal<HTMLElement>::nextSibling(*child)) { 86 if (isHTMLTableRowElement(child)) 87 return toHTMLTableRowElement(child); 88 if (child->hasLocalName(tbodyTag)) { 89 if (HTMLTableRowElement* row = Traversal<HTMLTableRowElement>::firstChild(*child)) 90 return row; 91 } 92 } 93 94 // Find the first row in the next foot section. 95 if (!previous || !isInFoot(previous)) 96 child = Traversal<HTMLElement>::firstChild(table); 97 else 98 child = Traversal<HTMLElement>::nextSibling(*previous->parentNode()); 99 for (; child; child = Traversal<HTMLElement>::nextSibling(*child)) { 100 if (child->hasLocalName(tfootTag)) { 101 if (HTMLTableRowElement* row = Traversal<HTMLTableRowElement>::firstChild(*child)) 102 return row; 103 } 104 } 105 106 return 0; 107 } 108 109 HTMLTableRowElement* HTMLTableRowsCollection::lastRow(HTMLTableElement& table) 110 { 111 for (HTMLElement* child = Traversal<HTMLElement>::lastChild(table); child; child = Traversal<HTMLElement>::previousSibling(*child)) { 112 if (child->hasLocalName(tfootTag)) { 113 if (HTMLTableRowElement* lastRow = Traversal<HTMLTableRowElement>::lastChild(*child)) 114 return lastRow; 115 } 116 } 117 118 for (HTMLElement* child = Traversal<HTMLElement>::lastChild(table); child; child = Traversal<HTMLElement>::previousSibling(*child)) { 119 if (isHTMLTableRowElement(child)) 120 return toHTMLTableRowElement(child); 121 if (child->hasLocalName(tbodyTag)) { 122 if (HTMLTableRowElement* lastRow = Traversal<HTMLTableRowElement>::lastChild(*child)) 123 return lastRow; 124 } 125 } 126 127 for (HTMLElement* child = Traversal<HTMLElement>::lastChild(table); child; child = Traversal<HTMLElement>::previousSibling(*child)) { 128 if (child->hasLocalName(theadTag)) { 129 if (HTMLTableRowElement* lastRow = Traversal<HTMLTableRowElement>::lastChild(*child)) 130 return lastRow; 131 } 132 } 133 134 return 0; 135 } 136 137 // Must call get() on the table in case that argument is compiled before dereferencing the 138 // table to get at the collection cache. Order of argument evaluation is undefined and can 139 // differ between compilers. 140 HTMLTableRowsCollection::HTMLTableRowsCollection(ContainerNode& table) 141 : HTMLCollection(table, TableRows, OverridesItemAfter) 142 { 143 ASSERT(isHTMLTableElement(table)); 144 } 145 146 PassRefPtrWillBeRawPtr<HTMLTableRowsCollection> HTMLTableRowsCollection::create(ContainerNode& table, CollectionType type) 147 { 148 ASSERT_UNUSED(type, type == TableRows); 149 return adoptRefWillBeNoop(new HTMLTableRowsCollection(table)); 150 } 151 152 Element* HTMLTableRowsCollection::virtualItemAfter(Element* previous) const 153 { 154 return rowAfter(toHTMLTableElement(ownerNode()), toHTMLTableRowElement(previous)); 155 } 156 157 } 158