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POWhy does my simple test NPObject not work?
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copied!<p>I have this getValue method + NPclass methods: </p> <pre><code>static bool hasmethod(NPObject *npobj, NPIdentifier name) { return true; } static NPObject* allocate (NPP npp, NPClass *aClass) { return browser-> createobject(npp, aClass); } static bool hasProperty(NPObject *npobj, NPIdentifier name) { return true; } static bool getProperty (NPObject *npobj, NPIdentifier name, NPVariant *result) { if (!result) return false; INT32_TO_NPVARIANT(50, *result); return true; } static void deallocate (NPObject *npobj) { browser -> memfree(npobj); } static bool enumerate(NPObject *npobj, NPIdentifier **value, uint32_t *count) { return false; } static bool defaultInvoke(NPObject* obj, const NPVariant *args, uint32_t argCount, NPVariant *result) { if (!result) return false; INT32_TO_NPVARIANT(42, *result); return true; } static bool setProperty (NPObject *npobj, NPIdentifier name, const NPVariant *value) { return false; } static void invalidate(NPObject *npobj) { } static bool removeProperty (NPObject *npobj,NPIdentifier name) { return false; } NPError NPP_GetValue(NPP instance, NPPVariable variable, void *value) { if (! instance) { return NPERR_INVALID_INSTANCE_ERROR; } struct NPClass class; class.structVersion = NP_CLASS_STRUCT_VERSION; class.construct = NULL; class.deallocate = deallocate; class.hasMethod = hasmethod; class.getProperty= getProperty; class.enumerate= enumerate; class.removeProperty= removeProperty; class.hasProperty = hasProperty; class.invoke = pinvoke; class.invokeDefault = defaultInvoke; class.invalidate = invalidate; class.setProperty = setProperty; class.allocate = allocate; if (variable == NPPVpluginScriptableNPObject) { void **v = (void **)value; struct NPObject *object = NPN_CreateObject(instance, &class); NPN_RetainObject(object); *v = object; return NPERR_NO_ERROR; } return NPERR_GENERIC_ERROR; } </code></pre> <p>Here are the two other methods the class points to:</p> <pre><code> bool hasmethod(NPObject *npobj, NPIdentifier name) { return true; } static bool pinvoke(NPObject* obj, NPIdentifier methodName, const NPVariant *args, uint32_t argCount, NPVariant *result) { if (!result) return false; INT32_TO_NPVARIANT(32, *result); return true; } </code></pre> <p>Basically, I wanted the object to return 32 when anything was called just to test.</p> <p>Here are my create & retain methods:</p> <pre><code>NPObject *NPN_CreateObject(NPP npp, NPClass *aClass) { return browser->createobject(npp, aClass); } NPObject *NPN_RetainObject(NPObject *npobj) { return browser->retainobject(npobj); } </code></pre> <p>In my Javascript:</p> <pre><code> <embed type="application/x-my-extension" id="pluginId"> <script> var plugin = document.getElementById("pluginId"); console.log(plugin.something); </code></pre> <p>The window is drawn on the page, but the console outputs undefined. Help would be greatly appreciated. Thanks!</p> <p>UPDATE: Georg suggested that the browser was crashing due to infinite recursion with my allocate method. Here is the new one:</p> <pre><code> void* NPN_MemAlloc(uint32_t size) { return browser->memalloc(size); } static NPObject* allocate (NPP npp, NPClass *aClass) { NPObject* object = (NPObject*)NPN_MemAlloc(sizeof(NPObject)); if (!object) { return NULL; } memset(object, 0, sizeof(NPObject)); return object; } </code></pre> <p>The plugin still crashes.</p> <p>Update 2: I made the object Instance specific</p> <pre><code>typedef struct PluginInstance { NPP npp; NPWindow window; NPObject *object; }PluginInstance; </code></pre> <p>In my NPP_New method I have</p> <pre><code> PluginInstance *newInstance = (PluginInstance*)malloc(sizeof(PluginInstance)); bzero(newInstance, sizeof(PluginInstance)); newInstance -> object = NPN_CreateObject(instance, &class); newInstance->npp = instance; instance->pdata = newInstance; </code></pre> <p>In my getValue method:</p> <pre><code> NPObject* obj = ((PluginInstance *) (instance->pdata)) -> object; void **v = (void **)value; NPN_RetainObject(obj); *v = obj; </code></pre> <p>still the same problem</p>

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