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1 // Copyright (c) 2008, Google Inc. | 1 // Copyright (c) 2008, Google Inc. |
2 // All rights reserved. | 2 // All rights reserved. |
3 // | 3 // |
4 // Redistribution and use in source and binary forms, with or without | 4 // Redistribution and use in source and binary forms, with or without |
5 // modification, are permitted provided that the following conditions are | 5 // modification, are permitted provided that the following conditions are |
6 // met: | 6 // met: |
7 // | 7 // |
8 // * Redistributions of source code must retain the above copyright | 8 // * Redistributions of source code must retain the above copyright |
9 // notice, this list of conditions and the following disclaimer. | 9 // notice, this list of conditions and the following disclaimer. |
10 // * Redistributions in binary form must reproduce the above | 10 // * Redistributions in binary form must reproduce the above |
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27 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | 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. | 28 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
29 | 29 |
30 #include "config.h" | 30 #include "config.h" |
31 #include "ExceptionContext.h" | 31 #include "ExceptionContext.h" |
32 | 32 |
33 #include "Node.h" | 33 #include "Node.h" |
34 | 34 |
35 namespace WebCore { | 35 namespace WebCore { |
36 | 36 |
37 // Unlike JSC, which stores exceptions in ExecState that is accessible from | 37 ExceptionContext::ExceptionContext(Node*) |
38 // ScriptController that is retrievable from Node*, V8 uses static chain of | 38 : m_data() |
39 // handlers (encapsulated as v8::TryCatch and here as ExceptionCatcher) | |
40 // to track exceptions, so it has no need for Node*. | |
41 ExceptionContext::ExceptionContext(Node* node) | |
42 { | 39 { |
43 } | 40 } |
44 | 41 |
45 ExceptionContext::ExceptionContext() | |
46 : m_exception() | |
47 , m_exceptionCatcher(0) | |
48 { | |
49 } | |
50 | |
51 void ExceptionContext::setExceptionCatcher(ExceptionCatcher* exceptionCatcher) | |
52 { | |
53 if (m_exceptionCatcher && exceptionCatcher) | |
54 m_exceptionCatcher->detachContext(); | |
55 | |
56 m_exceptionCatcher = exceptionCatcher; | |
57 } | |
58 | |
59 bool ExceptionContext::hadException() | 42 bool ExceptionContext::hadException() |
60 { | 43 { |
61 if (m_exceptionCatcher) | 44 return !m_data.IsEmpty(); |
62 m_exceptionCatcher->updateContext(); | |
63 | |
64 return !m_exception.IsEmpty(); | |
65 } | 45 } |
66 | 46 |
67 JSException ExceptionContext::exception() const | |
68 { | |
69 return m_exception; | |
70 } | |
71 | |
72 JSException ExceptionContext::noException() | |
73 { | |
74 return v8::Local<v8::Value>(); | |
75 } | |
76 | |
77 ExceptionCatcher::ExceptionCatcher(ExceptionContext* exceptionContext) | |
78 : m_context(exceptionContext) | |
79 , m_catcher() | |
80 { | |
81 exceptionContext->setExceptionCatcher(this); | |
82 } | |
83 | |
84 void ExceptionCatcher::detachContext() | |
85 { | |
86 m_context = 0; | |
87 } | |
88 | |
89 void ExceptionCatcher::updateContext() | |
90 { | |
91 ASSERT(m_context); | |
92 | |
93 if (m_catcher.HasCaught()) | |
94 m_context->setException(m_catcher.Exception()); | |
95 else | |
96 m_context->setException(ExceptionContext::noException()); | |
97 } | |
98 | |
99 ExceptionCatcher::~ExceptionCatcher() | |
100 { | |
101 if (!m_context) | |
102 return; | |
103 | |
104 updateContext(); | |
105 m_context->setExceptionCatcher(0); | |
106 } | |
107 | 47 |
108 } // namespace WebCore | 48 } // namespace WebCore |
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