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/*
* Copyright (C) 2020 Linux Studio Plugins Project <https://lsp-plug.in/>
* (C) 2020 Vladimir Sadovnikov <sadko4u@gmail.com>
*
* This file is part of lsp-tk-lib
* Created on: 6 мая 2020 г.
*
* lsp-tk-lib is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* any later version.
*
* lsp-tk-lib is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with lsp-tk-lib. If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef LSP_PLUG_IN_TK_BASE_CAST_H_
#define LSP_PLUG_IN_TK_BASE_CAST_H_
#ifndef LSP_PLUG_IN_TK_IMPL
#error "use <lsp-plug.in/tk/tk.h>"
#endif
namespace lsp
{
namespace tk
{
template <class Target>
inline Target *widget_cast(Widget *src)
{
return ((src != NULL) && (src->instance_of(&Target::metadata))) ? static_cast<Target *>(src) : NULL;
}
template <class Target>
inline const Target *widget_cast(const Widget *src)
{
return ((src != NULL) && (src->instance_of(&Target::metadata))) ? static_cast<const Target *>(src) : NULL;
}
template <class Target>
inline Target *widget_ptrcast(void *src)
{
Widget *w = (src != NULL) ? static_cast<Widget *>(src) : NULL;
return ((w != NULL) && (w->instance_of(&Target::metadata))) ? static_cast<Target *>(w) : NULL;
}
template <class Target>
inline const Target *widget_ptrcast(const void *src)
{
const Widget *w = (src != NULL) ? static_cast<const Widget *>(src) : NULL;
return ((w != NULL) && (w->instance_of(&Target::metadata))) ? static_cast<const Target *>(w) : NULL;
}
inline bool instance_of(Widget *w, const w_class_t *wc)
{
return (w != NULL) && (w->instance_of(wc));
}
template <class Target>
inline bool instance_of(Widget *w)
{
return (w != NULL) && (w->instance_of(&Target::metadata));
}
template <class Target>
inline Target *parent_widget(Widget *w)
{
if (w == NULL)
return NULL;
return widget_cast<Target>(w->parent(&Target::metadata));
}
}
}
#endif /* LSP_PLUG_IN_TK_BASE_CAST_H_ */
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