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      1 /*
      2  * Copyright (C) 2009 Google 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 are
      6  * met:
      7  *
      8  *     * Redistributions of source code must retain the above copyright
      9  * notice, this list of conditions and the following disclaimer.
     10  *     * Redistributions in binary form must reproduce the above
     11  * copyright notice, this list of conditions and the following disclaimer
     12  * in the documentation and/or other materials provided with the
     13  * distribution.
     14  *     * Neither the name of Google Inc. nor the names of its
     15  * contributors may be used to endorse or promote products derived from
     16  * this software without specific prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 
     31 #include "config.h"
     32 #include "DOMUtilitiesPrivate.h"
     33 
     34 #include "Element.h"
     35 #include "HTMLInputElement.h"
     36 #include "HTMLLinkElement.h"
     37 #include "HTMLMetaElement.h"
     38 #include "HTMLNames.h"
     39 #include "HTMLOptionElement.h"
     40 #include "Node.h"
     41 
     42 #include "WebInputElement.h"
     43 
     44 using namespace WebCore;
     45 
     46 namespace {
     47 
     48 template <class HTMLNodeType>
     49 HTMLNodeType* toHTMLElement(Node* node, const QualifiedName& name)
     50 {
     51     if (node->isHTMLElement()
     52         && static_cast<HTMLElement*>(node)->hasTagName(name)) {
     53         return static_cast<HTMLNodeType*>(node);
     54     }
     55     return 0;
     56 }
     57 
     58 } // namespace
     59 
     60 namespace WebKit {
     61 
     62 HTMLInputElement* toHTMLInputElement(Node* node)
     63 {
     64     return toHTMLElement<HTMLInputElement>(node, HTMLNames::inputTag);
     65 }
     66 
     67 HTMLLinkElement* toHTMLLinkElement(Node* node)
     68 {
     69     return toHTMLElement<HTMLLinkElement>(node, HTMLNames::linkTag);
     70 }
     71 
     72 HTMLMetaElement* toHTMLMetaElement(Node* node)
     73 {
     74     return toHTMLElement<HTMLMetaElement>(node, HTMLNames::metaTag);
     75 }
     76 
     77 HTMLOptionElement* toHTMLOptionElement(Node* node)
     78 {
     79     return toHTMLElement<HTMLOptionElement>(node, HTMLNames::optionTag);
     80 }
     81 
     82 String nameOfInputElement(HTMLInputElement* element)
     83 {
     84     return WebInputElement(element).nameForAutofill();
     85 }
     86 
     87 bool elementHasLegalLinkAttribute(const Element* element,
     88                                   const QualifiedName& attrName)
     89 {
     90     if (attrName == HTMLNames::srcAttr) {
     91         // Check src attribute.
     92         if (element->hasTagName(HTMLNames::imgTag)
     93             || element->hasTagName(HTMLNames::scriptTag)
     94             || element->hasTagName(HTMLNames::iframeTag)
     95             || element->hasTagName(HTMLNames::frameTag))
     96             return true;
     97         if (element->hasTagName(HTMLNames::inputTag)) {
     98             const HTMLInputElement* input =
     99             static_cast<const HTMLInputElement*>(element);
    100             if (input->inputType() == HTMLInputElement::IMAGE)
    101                 return true;
    102         }
    103     } else if (attrName == HTMLNames::hrefAttr) {
    104         // Check href attribute.
    105         if (element->hasTagName(HTMLNames::linkTag)
    106             || element->hasTagName(HTMLNames::aTag)
    107             || element->hasTagName(HTMLNames::areaTag))
    108             return true;
    109     } else if (attrName == HTMLNames::actionAttr) {
    110         if (element->hasTagName(HTMLNames::formTag))
    111             return true;
    112     } else if (attrName == HTMLNames::backgroundAttr) {
    113         if (element->hasTagName(HTMLNames::bodyTag)
    114             || element->hasTagName(HTMLNames::tableTag)
    115             || element->hasTagName(HTMLNames::trTag)
    116             || element->hasTagName(HTMLNames::tdTag))
    117             return true;
    118     } else if (attrName == HTMLNames::citeAttr) {
    119         if (element->hasTagName(HTMLNames::blockquoteTag)
    120             || element->hasTagName(HTMLNames::qTag)
    121             || element->hasTagName(HTMLNames::delTag)
    122             || element->hasTagName(HTMLNames::insTag))
    123             return true;
    124     } else if (attrName == HTMLNames::classidAttr
    125                || attrName == HTMLNames::dataAttr) {
    126         if (element->hasTagName(HTMLNames::objectTag))
    127             return true;
    128     } else if (attrName == HTMLNames::codebaseAttr) {
    129         if (element->hasTagName(HTMLNames::objectTag)
    130             || element->hasTagName(HTMLNames::appletTag))
    131             return true;
    132     }
    133     return false;
    134 }
    135 
    136 } // namespace WebKit
    137