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#ifndef XCB_RESOURCE_HH
#define XCB_RESOURCE_HH
#include "xcb_connection.hh"
#include <memory>
#include <xcb/xproto.h>
namespace xcb {
namespace internal {
struct WndDeleter {
void operator() (xcb_connection_t* conn, xcb_window_t wnd) const {
xcb_destroy_window(conn, wnd);
}
};
struct GCDeleter {
void operator() (xcb_connection_t* conn, xcb_gcontext_t gc) const {
xcb_free_gc(conn, gc);
}
};
struct FontDeleter {
void operator() (xcb_connection_t* conn, xcb_font_t font) const {
xcb_close_font(conn, font);
}
};
} // namespace internal
template<typename T, typename Deleter>
class xcb_resource {
public:
explicit xcb_resource(shared_conn conn)
: conn_(conn), id_(xcb_generate_id(conn_.get())) {}
constexpr xcb_resource()
: id_(XCB_NONE) {}
xcb_resource(xcb_resource const& res) = delete;
xcb_resource(xcb_resource&& res)
: conn_(res.conn_), id_(res.release()) { }
~xcb_resource() {
reset();
}
xcb_resource& operator=(xcb_resource const& res) = delete;
xcb_resource& operator=(xcb_resource&& res) {
reset();
conn_ = res.conn_;
id_ = res.release();
return *this;
}
T id() const {
return id_;
}
void reset() {
if (id_ == XCB_NONE)
return;
deleter_(conn_.get(), id_);
id_ = XCB_NONE;
}
T release() {
auto ret = id_;
id_ = XCB_NONE;
conn_.reset();
return ret;
}
private:
shared_conn conn_;
T id_;
Deleter const deleter_{};
};
typedef std::unique_ptr<xcb_resource<xcb_window_t,
internal::WndDeleter>> unique_wnd;
typedef std::shared_ptr<xcb_resource<xcb_window_t,
internal::WndDeleter>> shared_wnd;
unique_wnd make_unique_wnd(shared_conn conn);
shared_wnd make_shared_wnd(shared_conn conn);
typedef std::unique_ptr<xcb_resource<xcb_gcontext_t,
internal::GCDeleter>> unique_gc;
typedef std::shared_ptr<xcb_resource<xcb_gcontext_t,
internal::GCDeleter>> shared_gc;
unique_gc make_unique_gc(shared_conn conn);
shared_gc make_shared_gc(shared_conn conn);
typedef std::unique_ptr<xcb_resource<xcb_font_t,
internal::FontDeleter>> unique_font;
typedef std::shared_ptr<xcb_resource<xcb_font_t,
internal::FontDeleter>> shared_font;
unique_font make_unique_font(shared_conn conn);
shared_font make_shared_font(shared_conn conn);
} // namespace xcb
#endif // XCB_RESOURCE_HH
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