1 /* 2 * Copyright (C) 2004, 2006, 2007, 2008, 2009 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 COMPUTER, INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #ifndef TextEncoding_h 27 #define TextEncoding_h 28 29 #include "TextCodec.h" 30 #include <wtf/unicode/Unicode.h> 31 32 namespace WebCore { 33 34 class CString; 35 class String; 36 37 class TextEncoding { 38 public: 39 TextEncoding() : m_name(0) { } 40 TextEncoding(const char* name); 41 TextEncoding(const String& name); 42 43 bool isValid() const { return m_name; } 44 const char* name() const { return m_name; } 45 const char* domName() const; // name exposed via DOM 46 bool usesVisualOrdering() const; 47 bool isJapanese() const; 48 49 PassRefPtr<StringImpl> displayString(PassRefPtr<StringImpl> str) const 50 { 51 if (m_backslashAsCurrencySymbol == '\\' || !str) 52 return str; 53 return str->replace('\\', m_backslashAsCurrencySymbol); 54 } 55 void displayBuffer(UChar* characters, unsigned len) const 56 { 57 if (m_backslashAsCurrencySymbol == '\\') 58 return; 59 for (unsigned i = 0; i < len; ++i) { 60 if (characters[i] == '\\') 61 characters[i] = m_backslashAsCurrencySymbol; 62 } 63 } 64 65 const TextEncoding& closestByteBasedEquivalent() const; 66 const TextEncoding& encodingForFormSubmission() const; 67 68 String decode(const char* str, size_t length) const 69 { 70 bool ignored; 71 return decode(str, length, false, ignored); 72 } 73 String decode(const char*, size_t length, bool stopOnError, bool& sawError) const; 74 CString encode(const UChar*, size_t length, UnencodableHandling) const; 75 76 private: 77 UChar backslashAsCurrencySymbol() const; 78 bool isNonByteBasedEncoding() const; 79 bool isUTF7Encoding() const; 80 81 const char* m_name; 82 UChar m_backslashAsCurrencySymbol; 83 }; 84 85 inline bool operator==(const TextEncoding& a, const TextEncoding& b) { return a.name() == b.name(); } 86 inline bool operator!=(const TextEncoding& a, const TextEncoding& b) { return a.name() != b.name(); } 87 88 const TextEncoding& ASCIIEncoding(); 89 const TextEncoding& Latin1Encoding(); 90 const TextEncoding& UTF16BigEndianEncoding(); 91 const TextEncoding& UTF16LittleEndianEncoding(); 92 const TextEncoding& UTF32BigEndianEncoding(); 93 const TextEncoding& UTF32LittleEndianEncoding(); 94 const TextEncoding& UTF8Encoding(); 95 const TextEncoding& WindowsLatin1Encoding(); 96 97 } // namespace WebCore 98 99 #endif // TextEncoding_h 100