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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 "core/html/HTMLOptGroupElement.h"
     27 
     28 #include "HTMLNames.h"
     29 #include "core/dom/Document.h"
     30 #include "core/dom/NodeRenderStyle.h"
     31 #include "core/html/HTMLSelectElement.h"
     32 #include "wtf/StdLibExtras.h"
     33 
     34 namespace WebCore {
     35 
     36 using namespace HTMLNames;
     37 
     38 inline HTMLOptGroupElement::HTMLOptGroupElement(Document& document)
     39     : HTMLElement(optgroupTag, document)
     40 {
     41     setHasCustomStyleCallbacks();
     42     ScriptWrappable::init(this);
     43 }
     44 
     45 PassRefPtr<HTMLOptGroupElement> HTMLOptGroupElement::create(Document& document)
     46 {
     47     return adoptRef(new HTMLOptGroupElement(document));
     48 }
     49 
     50 bool HTMLOptGroupElement::isDisabledFormControl() const
     51 {
     52     return fastHasAttribute(disabledAttr);
     53 }
     54 
     55 bool HTMLOptGroupElement::rendererIsFocusable() const
     56 {
     57     // Optgroup elements do not have a renderer so we check the renderStyle instead.
     58     return renderStyle() && renderStyle()->display() != NONE;
     59 }
     60 
     61 const AtomicString& HTMLOptGroupElement::formControlType() const
     62 {
     63     DEFINE_STATIC_LOCAL(const AtomicString, optgroup, ("optgroup", AtomicString::ConstructFromLiteral));
     64     return optgroup;
     65 }
     66 
     67 void HTMLOptGroupElement::childrenChanged(bool changedByParser, Node* beforeChange, Node* afterChange, int childCountDelta)
     68 {
     69     recalcSelectOptions();
     70     HTMLElement::childrenChanged(changedByParser, beforeChange, afterChange, childCountDelta);
     71 }
     72 
     73 void HTMLOptGroupElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
     74 {
     75     HTMLElement::parseAttribute(name, value);
     76     recalcSelectOptions();
     77 
     78     if (name == disabledAttr)
     79         didAffectSelector(AffectedSelectorDisabled | AffectedSelectorEnabled);
     80 }
     81 
     82 void HTMLOptGroupElement::recalcSelectOptions()
     83 {
     84     ContainerNode* select = parentNode();
     85     while (select && !select->hasTagName(selectTag))
     86         select = select->parentNode();
     87     if (select)
     88         toHTMLSelectElement(select)->setRecalcListItems();
     89 }
     90 
     91 void HTMLOptGroupElement::attach(const AttachContext& context)
     92 {
     93     HTMLElement::attach(context);
     94     // If after attaching nothing called styleForRenderer() on this node we
     95     // manually cache the value. This happens if our parent doesn't have a
     96     // renderer like <optgroup> or if it doesn't allow children like <select>.
     97     if (!m_style && parentNode()->renderStyle())
     98         updateNonRenderStyle();
     99 }
    100 
    101 void HTMLOptGroupElement::detach(const AttachContext& context)
    102 {
    103     m_style.clear();
    104     HTMLElement::detach(context);
    105 }
    106 
    107 void HTMLOptGroupElement::updateNonRenderStyle()
    108 {
    109     m_style = originalStyleForRenderer();
    110 }
    111 
    112 RenderStyle* HTMLOptGroupElement::nonRendererStyle() const
    113 {
    114     return m_style.get();
    115 }
    116 
    117 PassRefPtr<RenderStyle> HTMLOptGroupElement::customStyleForRenderer()
    118 {
    119     // styleForRenderer is called whenever a new style should be associated
    120     // with an Element so now is a good time to update our cached style.
    121     updateNonRenderStyle();
    122     return m_style;
    123 }
    124 
    125 String HTMLOptGroupElement::groupLabelText() const
    126 {
    127     String itemText = getAttribute(labelAttr);
    128 
    129     // In WinIE, leading and trailing whitespace is ignored in options and optgroups. We match this behavior.
    130     itemText = itemText.stripWhiteSpace();
    131     // We want to collapse our whitespace too.  This will match other browsers.
    132     itemText = itemText.simplifyWhiteSpace();
    133 
    134     return itemText;
    135 }
    136 
    137 HTMLSelectElement* HTMLOptGroupElement::ownerSelectElement() const
    138 {
    139     ContainerNode* select = parentNode();
    140     while (select && !select->hasTagName(selectTag))
    141         select = select->parentNode();
    142 
    143     if (!select)
    144        return 0;
    145 
    146     return toHTMLSelectElement(select);
    147 }
    148 
    149 void HTMLOptGroupElement::accessKeyAction(bool)
    150 {
    151     HTMLSelectElement* select = ownerSelectElement();
    152     // send to the parent to bring focus to the list box
    153     if (select && !select->focused())
    154         select->accessKeyAction(false);
    155 }
    156 
    157 } // namespace
    158