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      1 /*
      2  * Copyright (C) 2010 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 
     33 #include "JSErrorHandler.h"
     34 
     35 #include "ErrorEvent.h"
     36 #include "Event.h"
     37 #include "JSEvent.h"
     38 #include <runtime/JSLock.h>
     39 
     40 using namespace JSC;
     41 
     42 namespace WebCore {
     43 
     44 JSErrorHandler::JSErrorHandler(JSObject* function, JSObject* wrapper, bool isAttribute, DOMWrapperWorld* isolatedWorld)
     45     : JSEventListener(function, wrapper, isAttribute, isolatedWorld)
     46 {
     47 }
     48 
     49 JSErrorHandler::~JSErrorHandler()
     50 {
     51 }
     52 
     53 void JSErrorHandler::handleEvent(ScriptExecutionContext* scriptExecutionContext, Event* event)
     54 {
     55     if (!event->isErrorEvent())
     56         return JSEventListener::handleEvent(scriptExecutionContext, event);
     57 
     58     ASSERT(scriptExecutionContext);
     59     if (!scriptExecutionContext)
     60         return;
     61 
     62     ErrorEvent* errorEvent = static_cast<ErrorEvent*>(event);
     63 
     64     JSLock lock(SilenceAssertionsOnly);
     65 
     66     JSObject* jsFunction = this->jsFunction(scriptExecutionContext);
     67     if (!jsFunction)
     68         return;
     69 
     70     JSDOMGlobalObject* globalObject = toJSDOMGlobalObject(scriptExecutionContext, isolatedWorld());
     71     if (!globalObject)
     72         return;
     73 
     74     ExecState* exec = globalObject->globalExec();
     75 
     76     CallData callData;
     77     CallType callType = jsFunction->getCallData(callData);
     78 
     79     if (callType != CallTypeNone) {
     80         RefPtr<JSErrorHandler> protectedctor(this);
     81 
     82         Event* savedEvent = globalObject->currentEvent();
     83         globalObject->setCurrentEvent(event);
     84 
     85         MarkedArgumentBuffer args;
     86         args.append(jsString(exec, errorEvent->message()));
     87         args.append(jsString(exec, errorEvent->filename()));
     88         args.append(jsNumber(errorEvent->lineno()));
     89 
     90         JSGlobalData& globalData = globalObject->globalData();
     91         DynamicGlobalObjectScope globalObjectScope(globalData, globalData.dynamicGlobalObject ? globalData.dynamicGlobalObject : globalObject);
     92 
     93         JSValue thisValue = globalObject->toThisObject(exec);
     94 
     95         globalData.timeoutChecker.start();
     96         JSValue returnValue = JSC::call(exec, jsFunction, callType, callData, thisValue, args);
     97         globalData.timeoutChecker.stop();
     98 
     99         globalObject->setCurrentEvent(savedEvent);
    100 
    101         if (exec->hadException())
    102             reportCurrentException(exec);
    103         else {
    104             bool retvalbool;
    105             if (returnValue.getBoolean(retvalbool) && !retvalbool)
    106                 event->preventDefault();
    107         }
    108     }
    109 }
    110 
    111 } // namespace WebCore
    112