OpaqueJSString.h 3.2 KB

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  1. /*
  2. * Copyright (C) 2008 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. #ifndef OpaqueJSString_h
  26. #define OpaqueJSString_h
  27. #include <wtf/ThreadSafeRefCounted.h>
  28. #include <wtf/text/WTFString.h>
  29. namespace JSC {
  30. class Identifier;
  31. class VM;
  32. }
  33. struct OpaqueJSString : public ThreadSafeRefCounted<OpaqueJSString> {
  34. static PassRefPtr<OpaqueJSString> create() // null
  35. {
  36. return adoptRef(new OpaqueJSString);
  37. }
  38. static PassRefPtr<OpaqueJSString> create(const LChar* characters, unsigned length)
  39. {
  40. return adoptRef(new OpaqueJSString(characters, length));
  41. }
  42. static PassRefPtr<OpaqueJSString> create(const UChar* characters, unsigned length)
  43. {
  44. return adoptRef(new OpaqueJSString(characters, length));
  45. }
  46. JS_EXPORT_PRIVATE static PassRefPtr<OpaqueJSString> create(const String&);
  47. #if COMPILER(CLANG)
  48. #pragma clang diagnostic push
  49. #pragma clang diagnostic ignored "-Wunknown-pragmas"
  50. #pragma clang diagnostic ignored "-Wundefined-bool-conversion"
  51. #endif
  52. const UChar* characters() { return !!this ? m_string.characters() : 0; }
  53. unsigned length() { return !!this ? m_string.length() : 0; }
  54. #if COMPILER(CLANG)
  55. #pragma clang diagnostic pop
  56. #endif
  57. JS_EXPORT_PRIVATE String string() const;
  58. JSC::Identifier identifier(JSC::VM*) const;
  59. #if PLATFORM(QT)
  60. QString qString() const { return m_string; }
  61. #endif
  62. private:
  63. friend class WTF::ThreadSafeRefCounted<OpaqueJSString>;
  64. OpaqueJSString()
  65. {
  66. }
  67. OpaqueJSString(const String& string)
  68. : m_string(string.isolatedCopy())
  69. {
  70. }
  71. OpaqueJSString(const LChar* characters, unsigned length)
  72. {
  73. m_string = String(characters, length);
  74. }
  75. OpaqueJSString(const UChar* characters, unsigned length)
  76. {
  77. m_string = String(characters, length);
  78. }
  79. String m_string;
  80. };
  81. #endif