1 /*

     2  * Copyright (c) 2010 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 "CSSOMUtils.h"

    33 

    34 #include "PlatformString.h"

    35 

    36 namespace WebCore {

    37 

    38 static void appendCharacter(UChar32 c, Vector<UChar>& appendTo)

    39 {

    40     if (U16_LENGTH(c) == 1)

    41         appendTo.append(static_cast<UChar>(c));

    42     else {

    43         appendTo.append(U16_LEAD(c));

    44         appendTo.append(U16_TRAIL(c));

    45     }

    46 }

    47 

    48 void serializeCharacter(UChar32 c, Vector<UChar>& appendTo)

    49 {

    50     appendTo.append('\\');

    51     appendCharacter(c, appendTo);

    52 }

    53 

    54 void serializeCharacterAsCodePoint(UChar32 c, Vector<UChar>& appendTo)

    55 {

    56     append(appendTo, String::format("\\%x ", c));

    57 }

    58 

    59 void serializeIdentifier(const String& identifier, String& appendTo)

    60 {

    61     Vector<UChar> addend;

    62     serializeIdentifier(identifier, addend);

    63     appendTo.append(String::adopt(addend));

    64 }

    65 

    66 void serializeIdentifier(const String& identifier, Vector<UChar>& appendTo)

    67 {

    68     bool isFirst = true;

    69     bool isSecond = false;

    70     bool isFirstCharHyphen = false;

    71     unsigned index = 0;

    72     while (index < identifier.length()) {

    73         UChar32 c = identifier.characterStartingAt(index);

    74         index += U16_LENGTH(c);

    75 

    76         if (c <= 0x1f || (0x30 <= c && c <= 0x39 && (isFirst || (isSecond && isFirstCharHyphen))))

    77             serializeCharacterAsCodePoint(c, appendTo);

    78         else if (c == 0x2d && isSecond && isFirstCharHyphen)

    79             serializeCharacter(c, appendTo);

    80         else if (0x80 <= c || c == 0x2d || c == 0x5f || (0x30 <= c && c <= 0x39) || (0x41 <= c && c <= 0x5a) || (0x61 <= c && c <= 0x7a))

    81             appendCharacter(c, appendTo);

    82         else

    83             serializeCharacter(c, appendTo);

    84 

    85         if (isFirst) {

    86             isFirst = false;

    87             isSecond = true;

    88             isFirstCharHyphen = (c == 0x2d);

    89         } else if (isSecond) {

    90             isSecond = false;

    91         }

    92     }

    93 }

    94 

    95 void serializeString(const String& string, String& appendTo)

    96 {

    97     Vector<UChar> addend;

    98     serializeString(string, addend);

    99     appendTo.append(String::adopt(addend));

   100 }

   101 

   102 void serializeString(const String& string, Vector<UChar>& appendTo)

   103 {

   104     appendTo.append('\"');

   105 

   106     unsigned index = 0;

   107     while (index < string.length()) {

   108         UChar32 c = string.characterStartingAt(index);

   109         index += U16_LENGTH(c);

   110         if (c <= 0x1f)

   111             serializeCharacterAsCodePoint(c, appendTo);

   112         else if (c == 0x22 || c == 0x5c)

   113             serializeCharacter(c, appendTo);

   114         else

   115             appendCharacter(c, appendTo);

   116     }

   117 

   118     appendTo.append('\"');

   119 }

   120 

   121 } // namespace WebCore