尝试使用NPAPI插件通过Javascript获取属性值时出现问题; 在调试过程中,我看到所有函数链(HasProperty,HasMethod和GetProperty)都被调用。更重要的是,我在调用GetProperty时看到我将新值设置为result参数。但是在离开GetProperty后,我得到了一个例外,无法理解它的原因。
May FireFox会调用一些我忘记初始化的其他功能吗?
提前致谢
我的代码是:
// static function which calls Get_Property for the instance of CScriptableNPObject
bool CScriptableNPObject::NP_GetProperty(NPObject *npobj, NPIdentifier name, NPVariant *result)
{
m_Logs.WriteLogs(10, _T("Enter the CScriptableNPObject::NP_GetProperty()"));
return ((CScriptableNPObject *)npobj)->GetProperty(name, result);
}
// just converter name from NPIdentifier to char *
bool CScriptableNPObject::GetProperty(NPIdentifier name, NPVariant *result)
{
NPUTF8 *pszProperty = m_pNPNFuncs->utf8fromidentifier(name);
return GetProperty(pszProperty, result);
}
// checking the dictionary of properties, if property exists put its value into the result
bool CScriptableNPObject::GetProperty(NPUTF8 *pszProperty, NPVariant *result)
{
VOID_TO_NPVARIANT(*result);
JSPropertiesMap::iterator it = m_JSProperties.find(pszProperty);
if (it == m_JSProperties.end())
return false;
NPUTF8 *pszNewPropertyValue = new NPUTF8[it->second->value.stringValue.UTF8Length + 1];
sprintf(pszNewPropertyValue, it->second->value.stringValue.UTF8Characters);
STRINGZ_TO_NPVARIANT(pszNewPropertyValue, *result);
return true;
}