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      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 "V8CustomPositionErrorCallback.h"
     28 
     29 #if ENABLE(GEOLOCATION)
     30 
     31 #include "ScriptExecutionContext.h"
     32 #include "V8CustomVoidCallback.h"  // For invokeCallback
     33 #include "V8PositionError.h"
     34 #include "V8Proxy.h"
     35 
     36 namespace WebCore {
     37 
     38 V8CustomPositionErrorCallback::V8CustomPositionErrorCallback(v8::Local<v8::Object> callback, ScriptExecutionContext* context)
     39     : PositionErrorCallback(context)
     40     , m_callback(v8::Persistent<v8::Object>::New(callback))
     41 {
     42 }
     43 
     44 V8CustomPositionErrorCallback::~V8CustomPositionErrorCallback()
     45 {
     46     m_callback.Dispose();
     47 }
     48 
     49 void V8CustomPositionErrorCallback::handleEvent(PositionError* error)
     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(error)
     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