On 12/22/2011 10:45 AM, lord_nemesis wrote:
I really have no clue about the correct way to do what you're doing. Perhaps bholley.Hello Benjamin (I am putting the name directly as I got help through him and now having issue in that area), This issue is putting us in most discomfort situation in business line... Please take time and help us out from here....Problem: We have a page that that is throwing a JS exception when running in our embedded gecko browser, but working fine in firefox. The page a javascript function which checks the value of a global though an if condition. the same is set an initial value in the<head> section of the page. some thing like this
--BDS
test = ""; myfunc() { if (test&& ...) { } } as you can see, test is not a var type. Its a global property. In our embedded gecko application, we are getting a "ReferenceError: test is undefined" exception when trying to check the value of test. This is however not happening in Firefox browser built from the same codebase. After some debugging, we arrived at the conclusion that our own code to call javascript functions on the page is causing some issue. our code for the same looks some thing like this. This is used to invoke custom js functions in some pages, but not on on the particular one that we are having problem with. can you please see if there is anything wrong with this code and also help us with solving the problem. CallJavaScript(const CString& strJSFnName, const CStringArray& paramArray, CString& strRetVal) { try { nsresult resultVal = NS_OK; nsCOMPtr<nsIDOMDocument> domDoc; if(nsnull == m_webNavigation ) //null check to avoid crash & show blank page incase of Webnavigation handle null { return false; } // Get the Document DOM resultVal = m_webNavigation-GetDocument(getter_AddRefs(domDoc));if (NS_FAILED(resultVal)) { return false; } // Get Document from DOM. nsCOMPtr<nsIDocument> doc = do_QueryInterface(domDoc, &resultVal); if (NS_FAILED(resultVal)) { return false; } // Get the Script Global Object from Document nsCOMPtr<nsIScriptGlobalObject> scriptGlobalObj(doc-GetScriptGlobalObject());if (scriptGlobalObj == nsnull) { return false; } // Get the Script Context nsCOMPtr<nsIScriptContext> scriptContext(scriptGlobalObj-GetContext());if (scriptContext == nsnull) { return false; } // Get the JSContext. JSContext *pJSContext = reinterpret_cast<JSContext*>(scriptContext->GetNativeContext()); JSObject *pJSObject = scriptGlobalObj->GetGlobalJSObject(); { AutoSetupJSContext setupJSContext(pJSContext); jsval jsReturnVal = 0; // Build the Input argument list int argCount =paramArray.GetSize(); jsval *pJSInputArgs = new jsval[argCount]; for (int argIndex = 0; argIndex< argCount; + +argIndex) { CString argStr = paramArray.GetAt(argIndex); jschar *pJSArgChars = (jschar *) (argStr.GetBuffer(argStr.GetLength())); JSString *jsArgStr = JS_NewUCStringCopyZ(pJSContext, pJSArgChars); argStr.ReleaseBuffer(); pJSInputArgs[argIndex] = STRING_TO_JSVAL(jsArgStr); } int jsFuncNameLen = WideCharToMultiByte(CP_ACP, 0, (LPCWSTR)(LPCTSTR)strJSFnName, -1, 0, 0, NULL, NULL); char* pJSFuncName = new char[jsFuncNameLen + 1]; WideCharToMultiByte(CP_ACP, 0, (LPCWSTR) (LPCTSTR)strJSFnName, -1, pJSFuncName, jsFuncNameLen, NULL, NULL); JSBool isJSCallSuccess = JS_CallFunctionName(pJSContext, pJSObject, pJSFuncName, argCount, pJSInputArgs,&jsReturnVal); class AutoSetupJSContext { public: AutoSetupJSContext(JSContext *pJSContext) : m_JSContextStack(), m_pJSContext(pJSContext) { nsresult resultVal = NS_OK; // Get the JSContext Stack. m_JSContextStack = do_GetService("@mozilla.org/js/xpc/ ContextStack;1",&resultVal); ASSERT(m_JSContextStack != nsnull); // Push the JSContext to JSContext Stack. resultVal = m_JSContextStack->Push(m_pJSContext); ASSERT(resultVal == NS_OK); // Set an Error handler on the JSContext. This handler will get control when ever // there is an error with executing a JS Function. JS_SetErrorReporter(pJSContext, JSErrorHandler); // Begin JS Request. This will ensure that we wait till any current activity on the // JSContext is completed before we do our own. JS_BeginRequest(pJSContext); } ~AutoSetupJSContext(void) { nsresult resultVal = NS_OK; // End the JS Request. We relinquish hold on the JSContext. JS_EndRequest(m_pJSContext); // Pop the JSContext from stack. resultVal = m_JSContextStack->Pop(nsnull); ASSERT(resultVal == NS_OK); } private: nsCOMPtr<nsIJSContextStack> m_JSContextStack; JSContext *m_pJSContext; }; _______________________________________________ dev-embedding mailing list dev-embedding@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-embedding
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