OLD | NEW |
| (Empty) |
1 /* | |
2 * Copyright (C) 2006, 2007, 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 "V8LazyEventListener.h" | |
33 | |
34 #include "Frame.h" | |
35 #include "V8Binding.h" | |
36 #include "V8Proxy.h" | |
37 | |
38 namespace WebCore { | |
39 | |
40 V8LazyEventListener::V8LazyEventListener(Frame *frame, const String& code, const
String& functionName) | |
41 : V8AbstractEventListener(frame, true) | |
42 , m_code(code) | |
43 , m_functionName(functionName) | |
44 , m_compiled(false) | |
45 , m_wrappedFunctionCompiled(false) | |
46 { | |
47 } | |
48 | |
49 V8LazyEventListener::~V8LazyEventListener() | |
50 { | |
51 disposeListenerObject(); | |
52 | |
53 // Dispose wrapped function | |
54 if (!m_wrappedFunction.IsEmpty()) { | |
55 #ifndef NDEBUG | |
56 V8Proxy::UnregisterGlobalHandle(this, m_wrappedFunction); | |
57 #endif | |
58 m_wrappedFunction.Dispose(); | |
59 m_wrappedFunction.Clear(); | |
60 } | |
61 } | |
62 | |
63 v8::Local<v8::Function> V8LazyEventListener::getListenerFunction() | |
64 { | |
65 if (m_compiled) { | |
66 ASSERT(m_listener.IsEmpty() || m_listener->IsFunction()); | |
67 return m_listener.IsEmpty() ? v8::Local<v8::Function>() : v8::Local<v8::
Function>::New(v8::Persistent<v8::Function>::Cast(m_listener)); | |
68 } | |
69 | |
70 m_compiled = true; | |
71 | |
72 ASSERT(m_frame); | |
73 | |
74 { | |
75 // Switch to the context of m_frame. | |
76 v8::HandleScope handleScope; | |
77 | |
78 // Use the outer scope to hold context. | |
79 v8::Handle<v8::Context> context = V8Proxy::GetContext(m_frame); | |
80 // Bail out if we could not get the context. | |
81 if (context.IsEmpty()) | |
82 return v8::Local<v8::Function>(); | |
83 | |
84 v8::Context::Scope scope(context); | |
85 | |
86 // Wrap function around the event code. The parenthesis around the func
tion are needed so that evaluating the code yields | |
87 // the function value. Without the parenthesis the function value is th
rown away. | |
88 | |
89 // Make it an anonymous function to avoid name conflict for cases like | |
90 // <body onload='onload()'> | |
91 // <script> function onload() { alert('hi'); } </script>. | |
92 // Set function name to function object instead. | |
93 // See issue 944690. | |
94 // | |
95 // The ECMAScript spec says (very obliquely) that the parameter to an ev
ent handler is named "evt". | |
96 String code = "(function (evt) {\n"; | |
97 code.append(m_code); | |
98 code.append("})"); | |
99 | |
100 v8::Handle<v8::String> codeExternalString = v8ExternalString(code); | |
101 v8::Handle<v8::Script> script = V8Proxy::CompileScript(codeExternalStrin
g, m_frame->document()->url(), m_lineNumber - 1); | |
102 if (!script.IsEmpty()) { | |
103 V8Proxy* proxy = V8Proxy::retrieve(m_frame); | |
104 ASSERT(proxy); | |
105 v8::Local<v8::Value> value = proxy->RunScript(script, false); | |
106 if (!value.IsEmpty()) { | |
107 ASSERT(value->IsFunction()); | |
108 v8::Local<v8::Function> listenerFunction = v8::Local<v8::Functio
n>::Cast(value); | |
109 listenerFunction->SetName(v8::String::New(FromWebCoreString(m_fu
nctionName), m_functionName.length())); | |
110 | |
111 m_listener = v8::Persistent<v8::Function>::New(listenerFunction)
; | |
112 #ifndef NDEBUG | |
113 V8Proxy::RegisterGlobalHandle(EVENT_LISTENER, this, m_listener); | |
114 #endif | |
115 } | |
116 } | |
117 } | |
118 | |
119 ASSERT(m_listener.IsEmpty() || m_listener->IsFunction()); | |
120 return m_listener.IsEmpty() ? v8::Local<v8::Function>() : v8::Local<v8::Func
tion>::New(v8::Persistent<v8::Function>::Cast(m_listener)); | |
121 } | |
122 | |
123 v8::Local<v8::Value> V8LazyEventListener::callListenerFunction(v8::Handle<v8::Va
lue> jsEvent, Event* event, bool isWindowEvent) | |
124 { | |
125 v8::Local<v8::Function> handlerFunction = getWrappedListenerFunction(); | |
126 v8::Local<v8::Object> receiver = getReceiverObject(event, isWindowEvent); | |
127 if (handlerFunction.IsEmpty() || receiver.IsEmpty()) | |
128 return v8::Local<v8::Value>(); | |
129 | |
130 v8::Handle<v8::Value> parameters[1] = { jsEvent }; | |
131 | |
132 V8Proxy* proxy = V8Proxy::retrieve(m_frame); | |
133 return proxy->CallFunction(handlerFunction, receiver, 1, parameters); | |
134 } | |
135 | |
136 v8::Local<v8::Function> V8LazyEventListener::getWrappedListenerFunction() | |
137 { | |
138 if (m_wrappedFunctionCompiled) { | |
139 ASSERT(m_wrappedFunction.IsEmpty() || m_wrappedFunction->IsFunction()); | |
140 return m_wrappedFunction.IsEmpty() ? v8::Local<v8::Function>() : v8::Loc
al<v8::Function>::New(m_wrappedFunction); | |
141 } | |
142 | |
143 m_wrappedFunctionCompiled = true; | |
144 | |
145 { | |
146 // Switch to the context of m_frame. | |
147 v8::HandleScope handleScope; | |
148 | |
149 // Use the outer scope to hold context. | |
150 v8::Handle<v8::Context> context = V8Proxy::GetContext(m_frame); | |
151 // Bail out if we cannot get the context. | |
152 if (context.IsEmpty()) | |
153 return v8::Local<v8::Function>(); | |
154 | |
155 v8::Context::Scope scope(context); | |
156 | |
157 // FIXME: cache the wrapper function. | |
158 String code = "(function (evt) {\n"; | |
159 | |
160 // Nodes other than the document object, when executing inline event han
dlers push document, form, and the target node on the scope chain. | |
161 // We do this by using 'with' statement. | |
162 // See chrome/fast/forms/form-action.html | |
163 // chrome/fast/forms/selected-index-value.html | |
164 // base/fast/overflow/onscroll-layer-self-destruct.html | |
165 code.append(" with (this.ownerDocument ? this.ownerDocument : {}) {\n")
; | |
166 code.append(" with (this.form ? this.form : {}) {\n"); | |
167 code.append(" with (this) {\n"); | |
168 code.append(" return (function(evt){"); | |
169 code.append(m_code); | |
170 code.append("}).call(this, evt);\n"); | |
171 code.append(" }\n"); | |
172 code.append(" }\n"); | |
173 code.append(" }\n"); | |
174 code.append("})"); | |
175 v8::Handle<v8::String> codeExternalString = v8ExternalString(code); | |
176 v8::Handle<v8::Script> script = V8Proxy::CompileScript(codeExternalStrin
g, m_frame->document()->url(), m_lineNumber - 4); | |
177 if (!script.IsEmpty()) { | |
178 V8Proxy* proxy = V8Proxy::retrieve(m_frame); | |
179 ASSERT(proxy); | |
180 v8::Local<v8::Value> value = proxy->RunScript(script, false); | |
181 if (!value.IsEmpty()) { | |
182 ASSERT(value->IsFunction()); | |
183 | |
184 m_wrappedFunction = v8::Persistent<v8::Function>::New(v8::Local<
v8::Function>::Cast(value)); | |
185 #ifndef NDEBUG | |
186 V8Proxy::RegisterGlobalHandle(EVENT_LISTENER, this, m_wrappedFun
ction); | |
187 #endif | |
188 m_wrappedFunction->SetName(v8::String::New(fromWebCoreString(m_f
unctionName), m_functionName.length())); | |
189 } | |
190 } | |
191 } | |
192 | |
193 return v8::Local<v8::Function>::New(m_wrappedFunction); | |
194 } | |
195 | |
196 } // namespace WebCore | |
OLD | NEW |