1/* 2 * Copyright (C) 2008, 2011, 2012, 2014 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 37namespace blink { 38 39using namespace HTMLNames; 40 41static inline bool isInSection(HTMLTableRowElement& row, const HTMLQualifiedName& sectionTag) 42{ 43 // Because we know that the parent is a table or a section, it's safe to cast it to an HTMLElement 44 // giving us access to the faster hasTagName overload from that class. 45 return toHTMLElement(row.parentNode())->hasTagName(sectionTag); 46} 47 48HTMLTableRowElement* HTMLTableRowsCollection::rowAfter(HTMLTableElement& table, HTMLTableRowElement* previous) 49{ 50 // Start by looking for the next row in this section. 51 // Continue only if there is none. 52 if (previous && previous->parentNode() != table) { 53 if (HTMLTableRowElement* row = Traversal<HTMLTableRowElement>::nextSibling(*previous)) 54 return row; 55 } 56 57 // If still looking at head sections, find the first row in the next head section. 58 HTMLElement* child = 0; 59 if (!previous) 60 child = Traversal<HTMLElement>::firstChild(table); 61 else if (isInSection(*previous, theadTag)) 62 child = Traversal<HTMLElement>::nextSibling(*previous->parentNode()); 63 for (; child; child = Traversal<HTMLElement>::nextSibling(*child)) { 64 if (child->hasTagName(theadTag)) { 65 if (HTMLTableRowElement* row = Traversal<HTMLTableRowElement>::firstChild(*child)) 66 return row; 67 } 68 } 69 70 // If still looking at top level and bodies, find the next row in top level or the first in the next body section. 71 if (!previous || isInSection(*previous, theadTag)) 72 child = Traversal<HTMLElement>::firstChild(table); 73 else if (previous->parentNode() == table) 74 child = Traversal<HTMLElement>::nextSibling(*previous); 75 else if (isInSection(*previous, tbodyTag)) 76 child = Traversal<HTMLElement>::nextSibling(*previous->parentNode()); 77 for (; child; child = Traversal<HTMLElement>::nextSibling(*child)) { 78 if (isHTMLTableRowElement(child)) 79 return toHTMLTableRowElement(child); 80 if (child->hasTagName(tbodyTag)) { 81 if (HTMLTableRowElement* row = Traversal<HTMLTableRowElement>::firstChild(*child)) 82 return row; 83 } 84 } 85 86 // Find the first row in the next foot section. 87 if (!previous || !isInSection(*previous, tfootTag)) 88 child = Traversal<HTMLElement>::firstChild(table); 89 else 90 child = Traversal<HTMLElement>::nextSibling(*previous->parentNode()); 91 for (; child; child = Traversal<HTMLElement>::nextSibling(*child)) { 92 if (child->hasTagName(tfootTag)) { 93 if (HTMLTableRowElement* row = Traversal<HTMLTableRowElement>::firstChild(*child)) 94 return row; 95 } 96 } 97 98 return 0; 99} 100 101HTMLTableRowElement* HTMLTableRowsCollection::lastRow(HTMLTableElement& table) 102{ 103 for (HTMLElement* tfoot = Traversal<HTMLElement>::lastChild(table, HasHTMLTagName(tfootTag)); tfoot; tfoot = Traversal<HTMLElement>::previousSibling(*tfoot, HasHTMLTagName(tfootTag))) { 104 if (HTMLTableRowElement* lastRow = Traversal<HTMLTableRowElement>::lastChild(*tfoot)) 105 return lastRow; 106 } 107 108 for (HTMLElement* child = Traversal<HTMLElement>::lastChild(table); child; child = Traversal<HTMLElement>::previousSibling(*child)) { 109 if (isHTMLTableRowElement(child)) 110 return toHTMLTableRowElement(child); 111 if (child->hasTagName(tbodyTag)) { 112 if (HTMLTableRowElement* lastRow = Traversal<HTMLTableRowElement>::lastChild(*child)) 113 return lastRow; 114 } 115 } 116 117 for (HTMLElement* thead = Traversal<HTMLElement>::lastChild(table, HasHTMLTagName(theadTag)); thead; thead = Traversal<HTMLElement>::previousSibling(*thead, HasHTMLTagName(theadTag))) { 118 if (HTMLTableRowElement* lastRow = Traversal<HTMLTableRowElement>::lastChild(*thead)) 119 return lastRow; 120 } 121 122 return 0; 123} 124 125// Must call get() on the table in case that argument is compiled before dereferencing the 126// table to get at the collection cache. Order of argument evaluation is undefined and can 127// differ between compilers. 128HTMLTableRowsCollection::HTMLTableRowsCollection(ContainerNode& table) 129 : HTMLCollection(table, TableRows, OverridesItemAfter) 130{ 131 ASSERT(isHTMLTableElement(table)); 132} 133 134PassRefPtrWillBeRawPtr<HTMLTableRowsCollection> HTMLTableRowsCollection::create(ContainerNode& table, CollectionType type) 135{ 136 ASSERT_UNUSED(type, type == TableRows); 137 return adoptRefWillBeNoop(new HTMLTableRowsCollection(table)); 138} 139 140Element* HTMLTableRowsCollection::virtualItemAfter(Element* previous) const 141{ 142 return rowAfter(toHTMLTableElement(ownerNode()), toHTMLTableRowElement(previous)); 143} 144 145} 146