1 /*

     2  * Copyright (C) 2010 Apple 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

     6  * are met:

     7  * 1. Redistributions of source code must retain the above copyright

     8  *    notice, this list of conditions and the following disclaimer.

     9  * 2. Redistributions in binary form must reproduce the above copyright

    10  *    notice, this list of conditions and the following disclaimer in the

    11  *    documentation and/or other materials provided with the distribution.

    12  *

    13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''

    14  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,

    15  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

    16  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS

    17  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

    18  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

    19  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

    20  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

    21  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

    22  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF

    23  * THE POSSIBILITY OF SUCH DAMAGE.

    24  */

    25 

    26 #include "config.h"

    27 #include "DatasetDOMStringMap.h"

    28 

    29 #include "Attribute.h"

    30 #include "Element.h"

    31 #include "ExceptionCode.h"

    32 #include "NamedNodeMap.h"

    33 #include <wtf/ASCIICType.h>

    34 

    35 namespace WebCore {

    36 

    37 static bool isValidAttributeName(const String& name)

    38 {

    39     if (!name.startsWith("data-"))

    40         return false;

    41 

    42     const UChar* characters = name.characters();

    43     unsigned length = name.length();

    44     for (unsigned i = 5; i < length; ++i) {

    45         if (isASCIIUpper(characters[i]))

    46             return false;

    47     }

    48 

    49     return true;

    50 }

    51 

    52 static String convertAttributeNameToPropertyName(const String& name)

    53 {

    54     Vector<UChar> newStringBuffer;

    55 

    56     const UChar* characters = name.characters();

    57     unsigned length = name.length();

    58     for (unsigned i = 5; i < length; ++i) {

    59         if (characters[i] != '-')

    60             newStringBuffer.append(characters[i]);

    61         else {

    62             if ((i + 1 < length) && isASCIILower(characters[i + 1])) {

    63                 newStringBuffer.append(toASCIIUpper(characters[i + 1]));

    64                 ++i;

    65             } else

    66                 newStringBuffer.append(characters[i]);

    67         }

    68     }

    69 

    70     return String::adopt(newStringBuffer);

    71 }

    72 

    73 static bool propertyNameMatchesAttributeName(const String& propertyName, const String& attributeName)

    74 {

    75     // FIXME: This should be able to match without creating a new string.

    76 

    77     if (!isValidAttributeName(attributeName))

    78         return false;

    79 

    80     String convertedName = convertAttributeNameToPropertyName(attributeName);

    81     return (convertedName == propertyName);

    82 }

    83 

    84 static bool isValidPropertyName(const String& name)

    85 {

    86     const UChar* characters = name.characters();

    87     unsigned length = name.length();

    88     for (unsigned i = 0; i < length; ++i) {

    89         if (characters[i] == '-' && (i + 1 < length) && isASCIILower(characters[i + 1]))

    90             return false;

    91     }

    92     return true;

    93 }

    94 

    95 static String convertPropertyNameToAttributeName(const String& name)

    96 {

    97     Vector<UChar> newStringBuffer;

    98 

    99     newStringBuffer.append('d');

   100     newStringBuffer.append('a');

   101     newStringBuffer.append('t');

   102     newStringBuffer.append('a');

   103     newStringBuffer.append('-');

   104 

   105     const UChar* characters = name.characters();

   106     unsigned length = name.length();

   107     for (unsigned i = 0; i < length; ++i) {

   108         if (isASCIIUpper(characters[i])) {

   109             newStringBuffer.append('-');

   110             newStringBuffer.append(toASCIILower(characters[i]));

   111         } else

   112             newStringBuffer.append(characters[i]);

   113     }

   114 

   115     return String::adopt(newStringBuffer);

   116 }

   117 

   118 

   119 void DatasetDOMStringMap::ref()

   120 {

   121     m_element->ref();

   122 }

   123 

   124 void DatasetDOMStringMap::deref()

   125 {

   126     m_element->deref();

   127 }

   128 

   129 void DatasetDOMStringMap::getNames(Vector<String>& names)

   130 {

   131     NamedNodeMap* attributeMap = m_element->attributes(true);

   132     if (attributeMap) {

   133         unsigned length = attributeMap->length();

   134         for (unsigned i = 0; i < length; i++) {

   135             Attribute* attribute = attributeMap->attributeItem(i);

   136             if (isValidAttributeName(attribute->localName()))

   137                 names.append(convertAttributeNameToPropertyName(attribute->localName()));

   138         }

   139     }

   140 }

   141 

   142 String DatasetDOMStringMap::item(const String& name)

   143 {

   144     NamedNodeMap* attributeMap = m_element->attributes(true);

   145     if (attributeMap) {

   146         unsigned length = attributeMap->length();

   147         for (unsigned i = 0; i < length; i++) {

   148             Attribute* attribute = attributeMap->attributeItem(i);

   149             if (propertyNameMatchesAttributeName(name, attribute->localName()))

   150                 return attribute->value();

   151         }

   152     }

   153 

   154     return String();

   155 }

   156 

   157 bool DatasetDOMStringMap::contains(const String& name)

   158 {

   159     NamedNodeMap* attributeMap = m_element->attributes(true);

   160     if (attributeMap) {

   161         unsigned length = attributeMap->length();

   162         for (unsigned i = 0; i < length; i++) {

   163             Attribute* attribute = attributeMap->attributeItem(i);

   164             if (propertyNameMatchesAttributeName(name, attribute->localName()))

   165                 return true;

   166         }

   167     }

   168     return false;

   169 }

   170 

   171 void DatasetDOMStringMap::setItem(const String& name, const String& value, ExceptionCode& ec)

   172 {

   173     if (!isValidPropertyName(name)) {

   174         ec = SYNTAX_ERR;

   175         return;

   176     }

   177 

   178     m_element->setAttribute(convertPropertyNameToAttributeName(name), value, ec);

   179 }

   180 

   181 void DatasetDOMStringMap::deleteItem(const String& name, ExceptionCode& ec)

   182 {

   183     if (!isValidPropertyName(name)) {

   184         ec = SYNTAX_ERR;

   185         return;

   186     }

   187 

   188     ExceptionCode dummy;

   189     m_element->removeAttribute(convertPropertyNameToAttributeName(name), dummy);

   190 }

   191 

   192 } // namespace WebCore