1 /*
2 * Copyright 2009, The Android Open Source Project
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 * * Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * * 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 THE COPYRIGHT HOLDERS ``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 THE COPYRIGHT OWNER 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
26 #include "config.h"
27 #include "V8CustomPositionCallback.h"
28
29 #if ENABLE(GEOLOCATION)
30
31 #include "ScriptExecutionContext.h"
32 #include "V8CustomVoidCallback.h" // For invokeCallback
33 #include "V8Geoposition.h"
34 #include "V8Proxy.h"
35
36 namespace WebCore {
37
V8CustomPositionCallback(v8::Local<v8::Object> callback,ScriptExecutionContext * context)38 V8CustomPositionCallback::V8CustomPositionCallback(v8::Local<v8::Object> callback, ScriptExecutionContext* context)
39 : PositionCallback(context)
40 , m_callback(v8::Persistent<v8::Object>::New(callback))
41 {
42 }
43
~V8CustomPositionCallback()44 V8CustomPositionCallback::~V8CustomPositionCallback()
45 {
46 m_callback.Dispose();
47 }
48
handleEvent(Geoposition * position)49 void V8CustomPositionCallback::handleEvent(Geoposition* position)
50 {
51 v8::HandleScope handleScope;
52
53 // ActiveDOMObject will null our pointer to the ScriptExecutionContext when it goes away.
54 ScriptExecutionContext* scriptContext = scriptExecutionContext();
55 if (!scriptContext)
56 return;
57
58 // The lookup of the proxy will fail if the Frame has been detached.
59 V8Proxy* proxy = V8Proxy::retrieve(scriptContext);
60 if (!proxy)
61 return;
62
63 v8::Handle<v8::Context> context = proxy->context();
64 if (context.IsEmpty())
65 return;
66
67 v8::Context::Scope scope(context);
68
69 v8::Handle<v8::Value> argv[] = {
70 toV8(position)
71 };
72
73 // Protect the script context until the callback returns.
74 RefPtr<ScriptExecutionContext> protector(scriptContext);
75
76 bool callbackReturnValue = false;
77 invokeCallback(m_callback, 1, argv, callbackReturnValue, scriptContext);
78 }
79
80 } // namespace WebCore
81
82 #endif // ENABLE(GEOLOCATION)
83