mirror of
https://github.com/rn10950/RetroZilla.git
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254 lines
7.4 KiB
C++
254 lines
7.4 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "plugin.h"
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#include "nsIServiceManager.h"
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#include "nsIMemory.h"
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#include "nsISupportsUtils.h" // this is where some useful macros defined
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// service manager which will give the access to all public browser services
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// we will use memory service as an illustration
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nsIServiceManager * gServiceManager = NULL;
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// Unix needs this
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#ifdef XP_UNIX
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#define MIME_TYPES_HANDLED "application/simple-plugin"
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#define PLUGIN_NAME "Simple Plugin Example for Mozilla"
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#define MIME_TYPES_DESCRIPTION MIME_TYPES_HANDLED"::"PLUGIN_NAME
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#define PLUGIN_DESCRIPTION PLUGIN_NAME " (Plug-ins SDK sample)"
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char* NPP_GetMIMEDescription(void)
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{
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return(MIME_TYPES_DESCRIPTION);
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}
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// get values per plugin
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NPError NS_PluginGetValue(NPPVariable aVariable, void *aValue)
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{
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NPError err = NPERR_NO_ERROR;
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switch (aVariable) {
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case NPPVpluginNameString:
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*((char **)aValue) = PLUGIN_NAME;
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break;
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case NPPVpluginDescriptionString:
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*((char **)aValue) = PLUGIN_DESCRIPTION;
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break;
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default:
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err = NPERR_INVALID_PARAM;
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break;
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}
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return err;
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}
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#endif //XP_UNIX
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//////////////////////////////////////
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//
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// general initialization and shutdown
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//
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NPError NS_PluginInitialize()
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{
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// this is probably a good place to get the service manager
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// note that Mozilla will add reference, so do not forget to release
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nsISupports * sm = NULL;
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NPN_GetValue(NULL, NPNVserviceManager, &sm);
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// Mozilla returns nsIServiceManager so we can use it directly; doing QI on
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// nsISupports here can still be more appropriate in case something is changed
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// in the future so we don't need to do casting of any sort.
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if(sm) {
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sm->QueryInterface(NS_GET_IID(nsIServiceManager), (void**)&gServiceManager);
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NS_RELEASE(sm);
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}
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return NPERR_NO_ERROR;
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}
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void NS_PluginShutdown()
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{
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// we should release the service manager
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NS_IF_RELEASE(gServiceManager);
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gServiceManager = NULL;
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}
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/////////////////////////////////////////////////////////////
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//
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// construction and destruction of our plugin instance object
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//
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nsPluginInstanceBase * NS_NewPluginInstance(nsPluginCreateData * aCreateDataStruct)
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{
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if(!aCreateDataStruct)
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return NULL;
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nsPluginInstance * plugin = new nsPluginInstance(aCreateDataStruct->instance);
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return plugin;
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}
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void NS_DestroyPluginInstance(nsPluginInstanceBase * aPlugin)
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{
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if(aPlugin)
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delete (nsPluginInstance *)aPlugin;
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}
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////////////////////////////////////////
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//
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// nsPluginInstance class implementation
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//
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nsPluginInstance::nsPluginInstance(NPP aInstance) : nsPluginInstanceBase(),
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mInstance(aInstance),
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mInitialized(FALSE),
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mScriptablePeer(NULL)
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{
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mString[0] = '\0';
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}
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nsPluginInstance::~nsPluginInstance()
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{
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// mScriptablePeer may be also held by the browser
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// so releasing it here does not guarantee that it is over
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// we should take precaution in case it will be called later
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// and zero its mPlugin member
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mScriptablePeer->SetInstance(NULL);
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NS_IF_RELEASE(mScriptablePeer);
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}
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NPBool nsPluginInstance::init(NPWindow* aWindow)
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{
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if(aWindow == NULL)
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return FALSE;
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mInitialized = TRUE;
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return TRUE;
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}
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void nsPluginInstance::shut()
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{
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mInitialized = FALSE;
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}
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NPBool nsPluginInstance::isInitialized()
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{
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return mInitialized;
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}
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void nsPluginInstance::getVersion(char* *aVersion)
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{
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const char *ua = NPN_UserAgent(mInstance);
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char*& version = *aVersion;
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// although we can use NPAPI NPN_MemAlloc call to allocate memory:
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// version = (char*)NPN_MemAlloc(strlen(ua) + 1);
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// for illustration purposed we use the service manager to access
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// the memory service provided by Mozilla
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nsIMemory * nsMemoryService = NULL;
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if (gServiceManager) {
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// get service using its contract id and use it to allocate the memory
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gServiceManager->GetServiceByContractID("@mozilla.org/xpcom/memory-service;1", NS_GET_IID(nsIMemory), (void **)&nsMemoryService);
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if(nsMemoryService)
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version = (char *)nsMemoryService->Alloc(strlen(ua) + 1);
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}
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if (version)
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strcpy(version, ua);
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// release service
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NS_IF_RELEASE(nsMemoryService);
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}
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// ==============================
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// ! Scriptability related code !
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// ==============================
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//
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// here the plugin is asked by Mozilla to tell if it is scriptable
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// we should return a valid interface id and a pointer to
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// nsScriptablePeer interface which we should have implemented
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// and which should be defined in the corressponding *.xpt file
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// in the bin/components folder
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NPError nsPluginInstance::GetValue(NPPVariable aVariable, void *aValue)
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{
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NPError rv = NPERR_NO_ERROR;
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switch (aVariable) {
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case NPPVpluginScriptableInstance: {
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// addref happens in getter, so we don't addref here
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nsISimplePlugin * scriptablePeer = getScriptablePeer();
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if (scriptablePeer) {
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*(nsISupports **)aValue = scriptablePeer;
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} else
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rv = NPERR_OUT_OF_MEMORY_ERROR;
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}
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break;
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case NPPVpluginScriptableIID: {
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static nsIID scriptableIID = NS_ISIMPLEPLUGIN_IID;
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nsIID* ptr = (nsIID *)NPN_MemAlloc(sizeof(nsIID));
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if (ptr) {
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*ptr = scriptableIID;
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*(nsIID **)aValue = ptr;
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} else
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rv = NPERR_OUT_OF_MEMORY_ERROR;
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}
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break;
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default:
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break;
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}
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return rv;
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}
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// ==============================
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// ! Scriptability related code !
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// ==============================
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//
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// this method will return the scriptable object (and create it if necessary)
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nsScriptablePeer* nsPluginInstance::getScriptablePeer()
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{
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if (!mScriptablePeer) {
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mScriptablePeer = new nsScriptablePeer(this);
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if(!mScriptablePeer)
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return NULL;
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NS_ADDREF(mScriptablePeer);
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}
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// add reference for the caller requesting the object
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NS_ADDREF(mScriptablePeer);
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return mScriptablePeer;
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}
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