Ben Murdoch | e69819b | 2013-07-17 14:56:49 +0100 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2013 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 | #ifndef ExceptionState_h |
| 32 | #define ExceptionState_h |
| 33 | |
| 34 | #include "bindings/v8/ScopedPersistent.h" |
| 35 | #include "bindings/v8/V8ThrowException.h" |
| 36 | #include "wtf/Noncopyable.h" |
| 37 | #include <v8.h> |
| 38 | |
| 39 | namespace WebCore { |
| 40 | |
| 41 | typedef int ExceptionCode; |
| 42 | |
| 43 | class ExceptionState { |
| 44 | WTF_MAKE_NONCOPYABLE(ExceptionState); |
| 45 | public: |
| 46 | explicit ExceptionState(v8::Isolate* isolate) |
| 47 | : m_code(0) |
| 48 | , m_isolate(isolate) { } |
| 49 | |
| 50 | virtual void throwDOMException(const ExceptionCode&, const char* message = 0); |
| 51 | virtual void throwTypeError(const char* message = 0); |
| 52 | |
| 53 | bool hadException() const { return !m_exception.isEmpty() || m_code; } |
| 54 | void clearException(); |
| 55 | |
| 56 | bool throwIfNeeded() |
| 57 | { |
| 58 | if (m_exception.isEmpty()) { |
| 59 | if (!m_code) |
| 60 | return false; |
| 61 | throwDOMException(m_code); |
| 62 | } |
| 63 | |
| 64 | V8ThrowException::throwError(m_exception.get()); |
| 65 | return true; |
| 66 | } |
| 67 | |
| 68 | // FIXME: Remove the rest of the public methods/operators once the transition is done. |
| 69 | typedef void* ExceptionState::*UnspecifiedBoolType; |
| 70 | operator UnspecifiedBoolType*() const |
| 71 | { |
| 72 | return m_code ? reinterpret_cast<UnspecifiedBoolType*>(1) : 0; |
| 73 | } |
| 74 | |
| 75 | operator ExceptionCode& () { return m_code; } |
| 76 | |
| 77 | ExceptionState& operator=(const ExceptionCode& ec) |
| 78 | { |
| 79 | throwDOMException(ec); |
| 80 | return *this; |
| 81 | } |
| 82 | |
| 83 | protected: |
| 84 | ExceptionCode m_code; |
| 85 | |
| 86 | private: |
| 87 | void setException(v8::Handle<v8::Value>); |
| 88 | |
| 89 | ScopedPersistent<v8::Value> m_exception; |
| 90 | v8::Isolate* m_isolate; |
| 91 | }; |
| 92 | |
| 93 | class NonThrowExceptionState : public ExceptionState { |
| 94 | public: |
| 95 | NonThrowExceptionState(); |
| 96 | virtual void throwDOMException(const ExceptionCode&, const char* = 0) OVERRIDE FINAL; |
| 97 | virtual void throwTypeError(const char* = 0) OVERRIDE FINAL; |
| 98 | }; |
| 99 | |
| 100 | } // namespace WebCore |
| 101 | |
| 102 | #endif // ExceptionState_h |