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#ifndef _TEXTFEED_H
#define _TEXTFEED_H
#include <bfc/common.h>
#include <map>
#include <string>
#include <utility>
#include <bfc/depend.h>
#include <api/service/svcs/svc_textfeed.h>
#include <api/syscb/callbacks/corecbi.h>
/**
This is the standard helper class for implementing a textfeed.
Be sure to check out class EzFeed in ezfeed.h, which combines this
class with a service factory.
*/
class TextFeed : public svc_textFeedI, public DependentI
{
public:
/**
Call this to register your feeds by id. Make the ids unique!
@see sendFeed()
@ret TRUE if succeeded, FALSE on error (i.e. nonunique id)
*/
int registerFeed(const wchar_t *feedid, const wchar_t *initial_text=L"", const wchar_t *description=L"");
/**
Call this to send text into a feed.
@see registerFeed()
@ret TRUE if succeeded, FALSE on error (i.e. feedid not registered)
*/
int sendFeed(const wchar_t *feedid, const wchar_t *text);
// Gives the most recently sent text on a feed.
virtual const wchar_t *getFeedText(const wchar_t *feedid);
// Gives a description for the feed (used by accessibility).
virtual const wchar_t *getFeedDescription(const wchar_t *feedid);
protected:
virtual api_dependent *getDependencyPtr() { return this; }
virtual void dependent_onRegViewer(api_dependentviewer *viewer, int add);
virtual void *dependent_getInterface(const GUID *classguid);
/**
Called when someone subscribes to this feed.
*/
virtual void onRegClient() { }
virtual void onDeregClient() { }
virtual int hasFeed(const wchar_t *name);
private:
std::map<std::wstring, std::pair<std::wstring, std::wstring> > feeds;
};
#endif
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