1 /*
2 * Copyright (C) 2008, 2009 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 "V8NPUtils.h"
33
34 #include "DOMWindow.h"
35 #include "Frame.h"
36 #include "PlatformString.h"
37 #include "npruntime_impl.h"
38 #include "npruntime_priv.h"
39 #include "NPV8Object.h"
40 #include "V8NPObject.h"
41 #include "V8Proxy.h"
42
43 namespace WebCore {
44
convertV8ObjectToNPVariant(v8::Local<v8::Value> object,NPObject * owner,NPVariant * result)45 void convertV8ObjectToNPVariant(v8::Local<v8::Value> object, NPObject* owner, NPVariant* result)
46 {
47 VOID_TO_NPVARIANT(*result);
48
49 // It is really the caller's responsibility to deal with the empty handle case because there could be different actions to
50 // take in different contexts.
51 ASSERT(!object.IsEmpty());
52
53 if (object.IsEmpty())
54 return;
55
56 if (object->IsNumber())
57 DOUBLE_TO_NPVARIANT(object->NumberValue(), *result);
58 else if (object->IsBoolean())
59 BOOLEAN_TO_NPVARIANT(object->BooleanValue(), *result);
60 else if (object->IsNull())
61 NULL_TO_NPVARIANT(*result);
62 else if (object->IsUndefined())
63 VOID_TO_NPVARIANT(*result);
64 else if (object->IsString()) {
65 v8::String::Utf8Value utf8(object);
66 int length = utf8.length() + 1;
67 char* utf8Chars = reinterpret_cast<char*>(malloc(length));
68 memcpy(utf8Chars, *utf8, length);
69 STRINGN_TO_NPVARIANT(utf8Chars, utf8.length(), *result);
70 } else if (object->IsObject()) {
71 DOMWindow* window = V8Proxy::retrieveWindow(V8Proxy::currentContext());
72 NPObject* npobject = npCreateV8ScriptObject(0, v8::Handle<v8::Object>::Cast(object), window);
73 if (npobject)
74 _NPN_RegisterObject(npobject, owner);
75 OBJECT_TO_NPVARIANT(npobject, *result);
76 }
77 }
78
convertNPVariantToV8Object(const NPVariant * variant,NPObject * npobject)79 v8::Handle<v8::Value> convertNPVariantToV8Object(const NPVariant* variant, NPObject* npobject)
80 {
81 NPVariantType type = variant->type;
82
83 switch (type) {
84 case NPVariantType_Int32:
85 return v8::Integer::New(NPVARIANT_TO_INT32(*variant));
86 case NPVariantType_Double:
87 return v8::Number::New(NPVARIANT_TO_DOUBLE(*variant));
88 case NPVariantType_Bool:
89 return NPVARIANT_TO_BOOLEAN(*variant) ? v8::True() : v8::False();
90 case NPVariantType_Null:
91 return v8::Null();
92 case NPVariantType_Void:
93 return v8::Undefined();
94 case NPVariantType_String: {
95 NPString src = NPVARIANT_TO_STRING(*variant);
96 return v8::String::New(src.UTF8Characters, src.UTF8Length);
97 }
98 case NPVariantType_Object: {
99 NPObject* obj = NPVARIANT_TO_OBJECT(*variant);
100 if (obj->_class == npScriptObjectClass)
101 return reinterpret_cast<V8NPObject*>(obj)->v8Object;
102 return createV8ObjectForNPObject(obj, npobject);
103 }
104 default:
105 return v8::Undefined();
106 }
107 }
108
109 // Helper function to create an NPN String Identifier from a v8 string.
getStringIdentifier(v8::Handle<v8::String> str)110 NPIdentifier getStringIdentifier(v8::Handle<v8::String> str)
111 {
112 const int kStackBufferSize = 100;
113
114 int bufferLength = str->Utf8Length() + 1;
115 if (bufferLength <= kStackBufferSize) {
116 // Use local stack buffer to avoid heap allocations for small strings. Here we should only use the stack space for
117 // stackBuffer when it's used, not when we use the heap.
118 //
119 // WriteUtf8 is guaranteed to generate a null-terminated string because bufferLength is constructed to be one greater
120 // than the string length.
121 char stackBuffer[kStackBufferSize];
122 str->WriteUtf8(stackBuffer, bufferLength);
123 return _NPN_GetStringIdentifier(stackBuffer);
124 }
125
126 v8::String::Utf8Value utf8(str);
127 return _NPN_GetStringIdentifier(*utf8);
128 }
129
130 struct ExceptionHandlerInfo {
131 ExceptionHandlerInfo* previous;
132 ExceptionHandler handler;
133 void* data;
134 };
135
136 static ExceptionHandlerInfo* topHandler;
137
pushExceptionHandler(ExceptionHandler handler,void * data)138 void pushExceptionHandler(ExceptionHandler handler, void* data)
139 {
140 ExceptionHandlerInfo* info = new ExceptionHandlerInfo;
141 info->previous = topHandler;
142 info->handler = handler;
143 info->data = data;
144 topHandler = info;
145 }
146
popExceptionHandler()147 void popExceptionHandler()
148 {
149 ASSERT(topHandler);
150 ExceptionHandlerInfo* doomed = topHandler;
151 topHandler = topHandler->previous;
152 delete doomed;
153 }
154
ExceptionCatcher()155 ExceptionCatcher::ExceptionCatcher()
156 {
157 if (!topHandler)
158 m_tryCatch.SetVerbose(true);
159 }
160
~ExceptionCatcher()161 ExceptionCatcher::~ExceptionCatcher()
162 {
163 if (!m_tryCatch.HasCaught())
164 return;
165
166 if (topHandler)
167 topHandler->handler(topHandler->data, *v8::String::Utf8Value(m_tryCatch.Exception()));
168 }
169
170 } // namespace WebCore
171