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      1 /*
      2  * Copyright (C) 1999 Lars Knoll (knoll (at) kde.org)
      3  *           (C) 1999 Antti Koivisto (koivisto (at) kde.org)
      4  *           (C) 2001 Dirk Mueller (mueller (at) kde.org)
      5  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2010 Apple Inc. All rights reserved.
      6  *           (C) 2006 Alexey Proskuryakov (ap (at) nypop.com)
      7  *
      8  * This library is free software; you can redistribute it and/or
      9  * modify it under the terms of the GNU Library General Public
     10  * License as published by the Free Software Foundation; either
     11  * version 2 of the License, or (at your option) any later version.
     12  *
     13  * This library is distributed in the hope that it will be useful,
     14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     16  * Library General Public License for more details.
     17  *
     18  * You should have received a copy of the GNU Library General Public License
     19  * along with this library; see the file COPYING.LIB.  If not, write to
     20  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     21  * Boston, MA 02110-1301, USA.
     22  *
     23  */
     24 
     25 #include "config.h"
     26 #include "HTMLOptGroupElement.h"
     27 
     28 #include "CSSStyleSelector.h"
     29 #include "Document.h"
     30 #include "HTMLNames.h"
     31 #include "HTMLSelectElement.h"
     32 #include "RenderMenuList.h"
     33 #include "NodeRenderStyle.h"
     34 #include <wtf/StdLibExtras.h>
     35 
     36 namespace WebCore {
     37 
     38 using namespace HTMLNames;
     39 
     40 inline HTMLOptGroupElement::HTMLOptGroupElement(const QualifiedName& tagName, Document* document, HTMLFormElement* form)
     41     : HTMLFormControlElement(tagName, document, form)
     42 {
     43     ASSERT(hasTagName(optgroupTag));
     44 }
     45 
     46 PassRefPtr<HTMLOptGroupElement> HTMLOptGroupElement::create(const QualifiedName& tagName, Document* document, HTMLFormElement* form)
     47 {
     48     return adoptRef(new HTMLOptGroupElement(tagName, document, form));
     49 }
     50 
     51 bool HTMLOptGroupElement::supportsFocus() const
     52 {
     53     return HTMLElement::supportsFocus();
     54 }
     55 
     56 bool HTMLOptGroupElement::isFocusable() const
     57 {
     58     // Optgroup elements do not have a renderer so we check the renderStyle instead.
     59     return supportsFocus() && renderStyle() && renderStyle()->display() != NONE;
     60 }
     61 
     62 const AtomicString& HTMLOptGroupElement::formControlType() const
     63 {
     64     DEFINE_STATIC_LOCAL(const AtomicString, optgroup, ("optgroup"));
     65     return optgroup;
     66 }
     67 
     68 void HTMLOptGroupElement::childrenChanged(bool changedByParser, Node* beforeChange, Node* afterChange, int childCountDelta)
     69 {
     70     recalcSelectOptions();
     71     HTMLFormControlElement::childrenChanged(changedByParser, beforeChange, afterChange, childCountDelta);
     72 }
     73 
     74 void HTMLOptGroupElement::parseMappedAttribute(Attribute* attr)
     75 {
     76     HTMLFormControlElement::parseMappedAttribute(attr);
     77     recalcSelectOptions();
     78 }
     79 
     80 void HTMLOptGroupElement::recalcSelectOptions()
     81 {
     82     ContainerNode* select = parentNode();
     83     while (select && !select->hasTagName(selectTag))
     84         select = select->parentNode();
     85     if (select)
     86         static_cast<HTMLSelectElement*>(select)->setRecalcListItems();
     87 }
     88 
     89 void HTMLOptGroupElement::attach()
     90 {
     91     if (parentNode()->renderStyle())
     92         setRenderStyle(styleForRenderer());
     93     HTMLFormControlElement::attach();
     94 }
     95 
     96 void HTMLOptGroupElement::detach()
     97 {
     98     m_style.clear();
     99     HTMLFormControlElement::detach();
    100 }
    101 
    102 void HTMLOptGroupElement::setRenderStyle(PassRefPtr<RenderStyle> newStyle)
    103 {
    104     m_style = newStyle;
    105 }
    106 
    107 RenderStyle* HTMLOptGroupElement::nonRendererRenderStyle() const
    108 {
    109     return m_style.get();
    110 }
    111 
    112 String HTMLOptGroupElement::groupLabelText() const
    113 {
    114     String itemText = document()->displayStringModifiedByEncoding(getAttribute(labelAttr));
    115 
    116     // In WinIE, leading and trailing whitespace is ignored in options and optgroups. We match this behavior.
    117     itemText = itemText.stripWhiteSpace();
    118     // We want to collapse our whitespace too.  This will match other browsers.
    119     itemText = itemText.simplifyWhiteSpace();
    120 
    121     return itemText;
    122 }
    123 
    124 HTMLSelectElement* HTMLOptGroupElement::ownerSelectElement() const
    125 {
    126     ContainerNode* select = parentNode();
    127     while (select && !select->hasTagName(selectTag))
    128         select = select->parentNode();
    129 
    130     if (!select)
    131        return 0;
    132 
    133     return static_cast<HTMLSelectElement*>(select);
    134 }
    135 
    136 void HTMLOptGroupElement::accessKeyAction(bool)
    137 {
    138     HTMLSelectElement* select = ownerSelectElement();
    139     // send to the parent to bring focus to the list box
    140     if (select && !select->focused())
    141         select->accessKeyAction(false);
    142 }
    143 
    144 } // namespace
    145