Home | History | Annotate | Download | only in src 
      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 using namespace WebCore;
     43 
     44 namespace {
     45 
     46 template <class HTMLNodeType>
     47 HTMLNodeType* toHTMLElement(Node* node, const QualifiedName& name)
     48 {
     49     if (node->isHTMLElement()
     50         && static_cast<HTMLElement*>(node)->hasTagName(name)) {
     51         return static_cast<HTMLNodeType*>(node);
     52     }
     53     return 0;
     54 }
     55 
     56 } // namespace
     57 
     58 namespace WebKit {
     59 
     60 HTMLInputElement* toHTMLInputElement(Node* node)
     61 {
     62     return toHTMLElement<HTMLInputElement>(node, HTMLNames::inputTag);
     63 }
     64 
     65 HTMLLinkElement* toHTMLLinkElement(Node* node)
     66 {
     67     return toHTMLElement<HTMLLinkElement>(node, HTMLNames::linkTag);
     68 }
     69 
     70 HTMLMetaElement* toHTMLMetaElement(Node* node)
     71 {
     72     return toHTMLElement<HTMLMetaElement>(node, HTMLNames::metaTag);
     73 }
     74 
     75 HTMLOptionElement* toHTMLOptionElement(Node* node)
     76 {
     77     return toHTMLElement<HTMLOptionElement>(node, HTMLNames::optionTag);
     78 }
     79 
     80 bool elementHasLegalLinkAttribute(const Element* element,
     81                                   const QualifiedName& attrName)
     82 {
     83     if (attrName == HTMLNames::srcAttr) {
     84         // Check src attribute.
     85         if (element->hasTagName(HTMLNames::imgTag)
     86             || element->hasTagName(HTMLNames::scriptTag)
     87             || element->hasTagName(HTMLNames::iframeTag)
     88             || element->hasTagName(HTMLNames::frameTag))
     89             return true;
     90         if (element->hasTagName(HTMLNames::inputTag)) {
     91             const HTMLInputElement* input =
     92             static_cast<const HTMLInputElement*>(element);
     93             if (input->isImageButton())
     94                 return true;
     95         }
     96     } else if (attrName == HTMLNames::hrefAttr) {
     97         // Check href attribute.
     98         if (element->hasTagName(HTMLNames::linkTag)
     99             || element->hasTagName(HTMLNames::aTag)
    100             || element->hasTagName(HTMLNames::areaTag))
    101             return true;
    102     } else if (attrName == HTMLNames::actionAttr) {
    103         if (element->hasTagName(HTMLNames::formTag))
    104             return true;
    105     } else if (attrName == HTMLNames::backgroundAttr) {
    106         if (element->hasTagName(HTMLNames::bodyTag)
    107             || element->hasTagName(HTMLNames::tableTag)
    108             || element->hasTagName(HTMLNames::trTag)
    109             || element->hasTagName(HTMLNames::tdTag))
    110             return true;
    111     } else if (attrName == HTMLNames::citeAttr) {
    112         if (element->hasTagName(HTMLNames::blockquoteTag)
    113             || element->hasTagName(HTMLNames::qTag)
    114             || element->hasTagName(HTMLNames::delTag)
    115             || element->hasTagName(HTMLNames::insTag))
    116             return true;
    117     } else if (attrName == HTMLNames::classidAttr
    118                || attrName == HTMLNames::dataAttr) {
    119         if (element->hasTagName(HTMLNames::objectTag))
    120             return true;
    121     } else if (attrName == HTMLNames::codebaseAttr) {
    122         if (element->hasTagName(HTMLNames::objectTag)
    123             || element->hasTagName(HTMLNames::appletTag))
    124             return true;
    125     }
    126     return false;
    127 }
    128 
    129 } // namespace WebKit
    130