winamp/Src/Wasabi/bfc/depend.cpp

#include "precomp_wasabi_bfc.h"
#include "depend.h"
#include "platform/guid.h"

DependentViewerI::DependentViewerI() : viewed_items(NULL) { }

DependentViewerI::DependentViewerI(const DependentViewerI &dep) :
		viewed_items(NULL)
{
	// watch their items now
	if (dep.viewed_items != NULL)
	{
		for (int i = 0; i < dep.viewed_items->getNumItems(); i++)
			viewer_addViewItem(dep.viewed_items->enumItem(i));
	}
}

DependentViewerI::~DependentViewerI()
{
	if (viewed_items != NULL)
	{
		// tell viewed items to detach from us
		foreach(viewed_items)
		viewed_items->getfor()->dependent_regViewer(this, FALSE);
		endfor
#if 0
		for (int i = 0; i < viewed_items->getNumItems(); i++)
		{
			ifc_dependent *item = viewed_items->enumItem(i);
			item->dependent_regViewer(this, FALSE);
		}
#endif
		viewed_items->removeAll();
		delete viewed_items;
	}
}

DependentViewerI &DependentViewerI::operator =(const DependentViewerI &dep)
{
	if (this != &dep)
	{
		viewer_delAllItems();
		// watch their items now
		if (dep.viewed_items != NULL)
		{
			for (int i = 0; i < dep.viewed_items->getNumItems(); i++)
				viewer_addViewItem(dep.viewed_items->enumItem(i));
		}
	}
	return *this;
}

void DependentViewerI::viewer_addViewItem(ifc_dependent *item)
{
	ASSERT(item != NULL);
	if (viewed_items == NULL) viewed_items = new DependentList(8);
	if (viewed_items->haveItem(item)) return ;
	viewed_items->addItem(item);
	item->dependent_regViewer(this, TRUE);
}

void DependentViewerI::viewer_delViewItem(ifc_dependent *item)
{
	if (item == NULL) return ;
	if (viewed_items == NULL || !viewed_items->haveItem(item)) return ;
	item->dependent_regViewer(this, FALSE);
	viewed_items->removeItem(item);
	if (viewed_items->getNumItems() == 0)
	{
		delete viewed_items; viewed_items = NULL;
	}
}

void DependentViewerI::viewer_delAllItems()
{
	while (viewed_items != NULL)
	{
		ifc_dependent *item = viewer_enumViewItem(0);
		if (item == NULL) break;
		viewer_delViewItem(item);
	}
	delete viewed_items;
	viewed_items = NULL;
}

void DependentViewerI::viewer_delAllOfClass(const GUID *guid)
{
	if (viewed_items == NULL) return ;
	foreach(viewed_items)
	if (viewed_items->getfor()->dependent_getInterface(guid))
		viewer_delViewItem(viewed_items->getfor());
	endfor
}

ifc_dependent *DependentViewerI::viewer_enumViewItem(int which)
{
	if (viewed_items == NULL) return NULL;
	return viewed_items->enumItem(which);
}

int DependentViewerI::viewer_getNumItems()
{
	if (viewed_items == NULL) return 0;
	return viewed_items->getNumItems();
}

int DependentViewerI::viewer_haveItem(ifc_dependent *item)
{
	if (viewed_items == NULL) return 0;
	return viewed_items->haveItem(item);
}

int DependentViewerI::dependentViewer_callback(ifc_dependent *item, const GUID *classguid, int cb, intptr_t param1, intptr_t param2, void *ptr, size_t ptrlen)
{
	if (viewed_items == NULL || !viewed_items->haveItem(item)) return 0;
	switch (cb)
	{
	case DependentCB::DEPCB_NOP: return 1;

	case DependentCB::DEPCB_DELETED:
		viewed_items->removeItem(item);
		return viewer_onItemDeleted(item);

	case DependentCB::DEPCB_EVENT:
		return viewer_onEvent(item, classguid, (int)param1, param2, ptr, ptrlen);
		break;
	}
	return 0;
}

DependentI::DependentI(const GUID *classguid) : viewers(NULL), class_guid(classguid ? *classguid : INVALID_GUID)
{}

DependentI::DependentI(const DependentI &dep) : viewers(NULL), class_guid(dep.class_guid) { }

DependentI::~DependentI()
{
	if (viewers != NULL)
	{
		foreach(viewers)
		viewers->getfor()->dependentViewer_callback(this, &class_guid, DependentCB::DEPCB_DELETED);
		endfor
		delete viewers;
	}
}

DependentI& DependentI::operator =(const ifc_dependent &dep)
{
	// placeholder code... nobody asked to watch us
	if (this != &dep)
	{
		viewers = NULL;
	}
	return *this;
}

void DependentI::dependent_regViewer(api_dependentviewer *viewer, int add)
{
	if (viewer == NULL) return ;
	if (add)
	{
		if (viewers == NULL) viewers = new ViewerList(8);
		if (viewers->haveItem(viewer)) return ;
		viewers->addItem(viewer);
		viewer->dependentViewer_callback(this, &class_guid, DependentCB::DEPCB_NOP);
	}
	else
	{	// delete
		if (viewers == NULL) return ;
		viewers->removeItem(viewer);
		if (viewers->getNumItems() == 0)
		{
			delete viewers; viewers = NULL;
		}
	}
	dependent_onRegViewer(viewer, add);
}

void DependentI::dependent_sendEvent(const GUID *classguid, int event, intptr_t param, void *ptr, size_t ptrlen, api_dependentviewer *viewer)
{
	if (classguid == NULL) classguid = &class_guid;	// use default
	ASSERT(*classguid != INVALID_GUID);
	sendViewerCallbacks(classguid, DependentCB::DEPCB_EVENT, event, param, ptr, ptrlen, viewer);
}

void DependentI::sendViewerCallbacks(const GUID *classguid, int msg, intptr_t param1, intptr_t param2, void *ptr, size_t ptrlen, api_dependentviewer *viewer)
{
	if (viewers == NULL) return ;
	ASSERT(classguid != NULL);
	foreach(viewers)
	if (viewer == NULL || viewer == viewers->getfor())
		viewers->getfor()->dependentViewer_callback(this, classguid, msg, param1, param2, ptr, ptrlen);
	endfor
}

#ifdef CBCLASS
#undef CBCLASS
#endif

#define CBCLASS DependentViewerI
START_DISPATCH;
CB(DEPENDENTVIEWER_CALLBACK, dependentViewer_callback);
END_DISPATCH;
#undef CBCLASS

#define CBCLASS DependentI
START_DISPATCH;
VCB(API_DEPENDENT_REGVIEWER, dependent_regViewer);
CB(API_DEPENDENT_GETINTERFACE, dependent_getInterface);
END_DISPATCH;
#undef CBCLASS