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      1 /*
      2  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
      3  *
      4  * This library is free software; you can redistribute it and/or
      5  * modify it under the terms of the GNU Library General Public
      6  * License as published by the Free Software Foundation; either
      7  * version 2 of the License, or (at your option) any later version.
      8  *
      9  * This library is distributed in the hope that it will be useful,
     10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     12  * Library General Public License for more details.
     13  *
     14  * You should have received a copy of the GNU Library General Public License
     15  * along with this library; see the file COPYING.LIB.  If not, write to
     16  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     17  * Boston, MA 02110-1301, USA.
     18  *
     19  */
     20 
     21 #include "config.h"
     22 #include "OptionElement.h"
     23 
     24 #include "Document.h"
     25 #include "Element.h"
     26 #include "HTMLNames.h"
     27 #include "HTMLOptionElement.h"
     28 #include "OptionGroupElement.h"
     29 #include "ScriptElement.h"
     30 #include "SelectElement.h"
     31 #include <wtf/Assertions.h>
     32 
     33 #if ENABLE(WML)
     34 #include "WMLOptionElement.h"
     35 #include "WMLNames.h"
     36 #endif
     37 
     38 namespace WebCore {
     39 
     40 void OptionElement::setSelectedState(OptionElementData& data, Element* element, bool selected)
     41 {
     42     if (data.selected() == selected)
     43         return;
     44 
     45     data.setSelected(selected);
     46     element->setNeedsStyleRecalc();
     47 }
     48 
     49 int OptionElement::optionIndex(SelectElement* selectElement, const Element* element)
     50 {
     51     if (!selectElement)
     52         return 0;
     53 
     54     // Let's do this dynamically. Might be a bit slow, but we're sure
     55     // we won't forget to update a member variable in some cases...
     56     const Vector<Element*>& items = selectElement->listItems();
     57     int length = items.size();
     58     int optionIndex = 0;
     59     for (int i = 0; i < length; ++i) {
     60         if (!isOptionElement(items[i]))
     61             continue;
     62         if (items[i] == element)
     63             return optionIndex;
     64         ++optionIndex;
     65     }
     66 
     67     return 0;
     68 }
     69 
     70 String OptionElement::collectOptionLabelOrText(const OptionElementData& data, const Element* element)
     71 {
     72     Document* document = element->document();
     73     String text;
     74 
     75     // WinIE does not use the label attribute, so as a quirk, we ignore it.
     76     if (!document->inQuirksMode())
     77         text = data.label();
     78     if (text.isEmpty())
     79         text = collectOptionInnerText(element);
     80     return normalizeText(document, text);
     81 }
     82 
     83 String OptionElement::collectOptionInnerText(const Element* element)
     84 {
     85     String text;
     86     Node* n = element->firstChild();
     87     while (n) {
     88         if (n->nodeType() == Node::TEXT_NODE || n->nodeType() == Node::CDATA_SECTION_NODE)
     89             text += n->nodeValue();
     90 
     91         // skip script content
     92         if (n->isElementNode() && toScriptElement(static_cast<Element*>(n)))
     93             n = n->traverseNextSibling(element);
     94         else
     95             n = n->traverseNextNode(element);
     96     }
     97     return text;
     98 }
     99 
    100 String OptionElement::normalizeText(const Document* document, const String& src)
    101 {
    102     String text = document->displayStringModifiedByEncoding(src);
    103 
    104     // In WinIE, leading and trailing whitespace is ignored in options and optgroups. We match this behavior.
    105     text = text.stripWhiteSpace();
    106 
    107     // We want to collapse our whitespace too.  This will match other browsers.
    108     text = text.simplifyWhiteSpace();
    109     return text;
    110 }
    111 
    112 String OptionElement::collectOptionTextRespectingGroupLabel(const OptionElementData& data, const Element* element)
    113 {
    114     Element* parentElement = static_cast<Element*>(element->parentNode());
    115     if (parentElement && toOptionGroupElement(parentElement))
    116         return "    " + collectOptionLabelOrText(data, element);
    117 
    118     return collectOptionLabelOrText(data, element);
    119 }
    120 
    121 String OptionElement::collectOptionValue(const OptionElementData& data, const Element* element)
    122 {
    123     String value = data.value();
    124     if (!value.isNull())
    125         return value;
    126 
    127     // Use the text if the value wasn't set.
    128     return collectOptionInnerText(element).stripWhiteSpace();
    129 }
    130 
    131 // OptionElementData
    132 OptionElementData::OptionElementData()
    133     : m_selected(false)
    134 {
    135 }
    136 
    137 OptionElementData::~OptionElementData()
    138 {
    139 }
    140 
    141 OptionElement* toOptionElement(Element* element)
    142 {
    143     if (element->isHTMLElement() && element->hasTagName(HTMLNames::optionTag))
    144         return static_cast<HTMLOptionElement*>(element);
    145 
    146 #if ENABLE(WML)
    147     if (element->isWMLElement() && element->hasTagName(WMLNames::optionTag))
    148         return static_cast<WMLOptionElement*>(element);
    149 #endif
    150 
    151     return 0;
    152 }
    153 
    154 bool isOptionElement(Element* element)
    155 {
    156     return element->hasLocalName(HTMLNames::optionTag)
    157 #if ENABLE(WML)
    158         || element->hasLocalName(WMLNames::optionTag)
    159 #endif
    160         ;
    161 }
    162 
    163 }
    164