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      1 /*
      2  * Copyright (C) 2008 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 
     23 #if ENABLE(WML)
     24 #include "WMLElement.h"
     25 
     26 #include "CSSPropertyNames.h"
     27 #include "HTMLNames.h"
     28 #include "MappedAttribute.h"
     29 #include "RenderObject.h"
     30 #include "WMLErrorHandling.h"
     31 #include "WMLNames.h"
     32 #include "WMLVariables.h"
     33 
     34 using std::max;
     35 using std::min;
     36 
     37 namespace WebCore {
     38 
     39 using namespace WMLNames;
     40 
     41 WMLElement::WMLElement(const QualifiedName& tagName, Document* document)
     42     : StyledElement(tagName, document, CreateElementZeroRefCount)
     43 {
     44 }
     45 
     46 PassRefPtr<WMLElement> WMLElement::create(const QualifiedName& tagName, Document* document)
     47 {
     48     return new WMLElement(tagName, document);
     49 }
     50 
     51 bool WMLElement::mapToEntry(const QualifiedName& attrName, MappedAttributeEntry& result) const
     52 {
     53     if (attrName == HTMLNames::alignAttr) {
     54         result = eUniversal;
     55         return false;
     56     }
     57 
     58     return StyledElement::mapToEntry(attrName, result);
     59 }
     60 
     61 void WMLElement::parseMappedAttribute(MappedAttribute* attr)
     62 {
     63     if (attr->name() == idAttributeName()
     64         || attr->name() == HTMLNames::classAttr
     65         || attr->name() == HTMLNames::styleAttr)
     66         return StyledElement::parseMappedAttribute(attr);
     67 
     68     if (attr->name() == HTMLNames::alignAttr) {
     69         if (equalIgnoringCase(attr->value(), "middle"))
     70             addCSSProperty(attr, CSSPropertyTextAlign, "center");
     71         else
     72             addCSSProperty(attr, CSSPropertyTextAlign, attr->value());
     73     } else if (attr->name() == HTMLNames::tabindexAttr) {
     74         String indexstring = attr->value();
     75         if (indexstring.length()) {
     76             bool parsedOK;
     77             int tabindex = indexstring.toIntStrict(&parsedOK);
     78             if (parsedOK)
     79                 // Clamp tabindex to the range of 'short' to match Firefox's behavior.
     80                 setTabIndexExplicitly(max(static_cast<int>(std::numeric_limits<short>::min()), min(tabindex, static_cast<int>(std::numeric_limits<short>::max()))));
     81         }
     82     }
     83 }
     84 
     85 String WMLElement::title() const
     86 {
     87     return parseValueSubstitutingVariableReferences(getAttribute(HTMLNames::titleAttr));
     88 }
     89 
     90 bool WMLElement::rendererIsNeeded(RenderStyle* style)
     91 {
     92     return document()->documentElement() == this || style->display() != NONE;
     93 }
     94 
     95 RenderObject* WMLElement::createRenderer(RenderArena*, RenderStyle* style)
     96 {
     97     return RenderObject::createObject(this, style);
     98 }
     99 
    100 String WMLElement::parseValueSubstitutingVariableReferences(const AtomicString& value, WMLErrorCode defaultErrorCode) const
    101 {
    102     bool isValid = false;
    103     if (!containsVariableReference(value, isValid))
    104         return value;
    105 
    106     if (!isValid) {
    107         reportWMLError(document(), defaultErrorCode);
    108         return String();
    109     }
    110 
    111     return substituteVariableReferences(value, document());
    112 }
    113 
    114 String WMLElement::parseValueForbiddingVariableReferences(const AtomicString& value) const
    115 {
    116     bool isValid = false;
    117     if (containsVariableReference(value, isValid)) {
    118         reportWMLError(document(), WMLErrorInvalidVariableReferenceLocation);
    119         return String();
    120     }
    121 
    122     return value;
    123 }
    124 
    125 }
    126 
    127 #endif
    128