зеркало из https://github.com/mozilla/pjs.git
Converting ViewFactory to nsIModule.
This commit is contained in:
dp%netscape.com
Родитель
8eab336b3d
Коммит
c5202d45c3
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@ -19,19 +19,26 @@
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#include "nscore.h"
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#include "nsIGenericFactory.h"
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#include "nsISupports.h"
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#include "nsCOMPtr.h"
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#include "nsIServiceManager.h"
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#include "nsViewsCID.h"
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#include "nsView.h"
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#include "nsViewManager.h"
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#include "nsScrollingView.h"
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static NS_DEFINE_IID(kCViewManager, NS_VIEW_MANAGER_CID);
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static NS_DEFINE_IID(kCView, NS_VIEW_CID);
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static NS_DEFINE_IID(kCScrollingView, NS_SCROLLING_VIEW_CID);
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#include "nsIModule.h"
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static NS_DEFINE_CID(kCViewManager, NS_VIEW_MANAGER_CID);
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static NS_DEFINE_CID(kCView, NS_VIEW_CID);
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static NS_DEFINE_CID(kCScrollingView, NS_SCROLLING_VIEW_CID);
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static NS_DEFINE_CID(kCComponentManager, NS_COMPONENTMANAGER_CID);
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static NS_DEFINE_IID(kISupportsIID, NS_ISUPPORTS_IID);
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static NS_DEFINE_IID(kIFactoryIID, NS_IFACTORY_IID);
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class nsViewFactory : public nsIFactory
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{
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public:
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@ -96,6 +103,9 @@ nsresult nsViewFactory::LockFactory(PRBool aLock)
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NS_GENERIC_FACTORY_CONSTRUCTOR(nsViewManager)
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#if 0
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// OBSOLETED by nsViewModule - dp
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// return the proper factory to the caller
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extern "C" NS_VIEW nsresult
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NSGetFactory(nsISupports* serviceMgr,
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@ -132,3 +142,202 @@ NSGetFactory(nsISupports* serviceMgr,
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return rv;
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}
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#endif /* 0 */
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//////////////////////////////////////////////////////////////////////
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// Module object definition
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class nsViewModule : public nsIModule
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{
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public:
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NS_DECL_ISUPPORTS
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// Construction, Init and destruction
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nsViewModule();
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virtual ~nsViewModule();
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// nsIModule Interfaces
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NS_DECL_NSIMODULE
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// Facility for counting object instances
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int IncrementObjCount() { if (mObjCount < 0) mObjCount = 0; return ++mObjCount; }
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int DecrementObjCount()
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{
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NS_ASSERTION(mObjCount <= -1, "Object count negative.");
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return --mObjCount;
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}
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int GetObjCount() { return mObjCount; }
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private:
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int mObjCount;
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};
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//////////////////////////////////////////////////////////////////////
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// Module Global
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//
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// This is used by the module to count object. Constructors and
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// destructors of objects created by this module need to
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// inc/dec the object count for the module. Unload decision will
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// be taken based on this.
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//
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// Constructor:
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// gModule->IncrementObjCount();
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//
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// Descructor:
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// gModule->DecrementObjCount();
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//
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// WARNING: This is weak reference. XPCOM guarantees that this module
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// object will be deleted just before the dll is unloaded. Hence,
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// holding a weak reference is ok.
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static nsViewModule *gModule = NULL;
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//////////////////////////////////////////////////////////////////////
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// Module entry point
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extern "C" NS_EXPORT nsresult NSGetModule(nsIComponentManager *servMgr,
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nsIFileSpec* location,
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nsIModule** return_cobj)
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{
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nsViewModule *viewModule;
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nsresult rv = NS_OK;
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NS_ASSERTION(return_cobj, "Null argument");
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NS_ASSERTION(gModule == NULL, "nsViewModule: Module already created.");
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viewModule = new nsViewModule;
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if (viewModule == NULL) return NS_ERROR_OUT_OF_MEMORY;
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rv = viewModule->QueryInterface(nsIModule::GetIID(), (void **)return_cobj);
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if (NS_FAILED(rv))
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{
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delete viewModule;
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viewModule = NULL;
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}
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// WARNING: Weak Reference
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gModule = viewModule;
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return rv;
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}
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//////////////////////////////////////////////////////////////////////
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// VIEW Decoder Module Implementation
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NS_IMPL_ISUPPORTS(nsViewModule, nsIModule::GetIID())
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nsViewModule::nsViewModule(void)
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: mObjCount(-1)
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{
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NS_INIT_ISUPPORTS();
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}
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nsViewModule::~nsViewModule(void)
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{
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NS_ASSERTION(mObjCount <= 0, "Module released while having outstanding objects.");
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}
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//
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// The class object for us is just the factory and nothing more.
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//
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NS_IMETHODIMP
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nsViewModule::GetClassObject(nsIComponentManager *aCompMgr, const nsCID & aClass,
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const nsIID &aIID, void **aFactory)
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{
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nsresult rv = NS_OK;
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if (nsnull == aFactory)
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return NS_ERROR_NULL_POINTER;
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// XXX should we do this ?
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*aFactory = nsnull;
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if (aClass.Equals(kCViewManager))
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{
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nsCOMPtr<nsIGenericFactory> factory;
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rv = NS_NewGenericFactory(getter_AddRefs(factory), &nsViewManagerConstructor);
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if (NS_SUCCEEDED(rv))
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{
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rv = factory->QueryInterface(aIID, aFactory);
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}
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}
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else if (aClass.Equals(kCView) || aClass.Equals(kCScrollingView))
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{
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rv = NS_ERROR_OUT_OF_MEMORY;
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nsViewFactory* factory = new nsViewFactory(aClass);
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if (factory)
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{
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NS_ADDREF(factory);
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rv = factory->QueryInterface(aIID, aFactory);
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NS_RELEASE(factory);
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}
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}
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return rv;
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}
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NS_IMETHODIMP
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nsViewModule::RegisterSelf(nsIComponentManager *aCompMgr,
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nsIFileSpec *location,
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const char *registryLocation,
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const char *componentType)
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{
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nsresult rv;
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#ifdef DEBUG_dp
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printf("***Registering view library...");
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#endif
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rv = aCompMgr->RegisterComponentSpec(kCViewManager, "View Manager",
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"component://netscape/view-manager",
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location, PR_TRUE, PR_TRUE);
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if (NS_FAILED(rv)) return rv;
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rv = aCompMgr->RegisterComponentSpec(kCView, "View",
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"component://netscape/view",
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location, PR_TRUE, PR_TRUE);
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if (NS_FAILED(rv)) return rv;
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rv = aCompMgr->RegisterComponentSpec(kCScrollingView, "Scrolling View",
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"component://netscape/scrolling-view",
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location, PR_TRUE, PR_TRUE);
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#ifdef DEBUG_dp
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printf("done.\n");
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#endif
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return rv;
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}
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NS_IMETHODIMP
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nsViewModule::UnregisterSelf(nsIComponentManager *aCompMgr,
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nsIFileSpec *location,
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const char *registryLocation)
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{
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nsresult rv;
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rv = aCompMgr->UnregisterComponentSpec(kCViewManager, location);
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if (NS_FAILED(rv)) return rv;
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rv = aCompMgr->UnregisterComponentSpec(kCView, location);
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if (NS_FAILED(rv)) return rv;
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rv = aCompMgr->UnregisterComponentSpec(kCScrollingView, location);
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return rv;
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}
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NS_IMETHODIMP
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nsViewModule::CanUnload(nsIComponentManager *aCompMgr, PRBool *okToUnload)
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{
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if (mObjCount < 0)
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{
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// Dll doesn't count objects.
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return NS_ERROR_FAILURE;
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}
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PRBool unloadable = PR_FALSE;
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if (mObjCount == 0)
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{
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// This dll can be unloaded now
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unloadable = PR_TRUE;
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}
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if (okToUnload) *okToUnload = unloadable;
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return NS_OK;
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}
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//////////////////////////////////////////////////////////////////////
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