Refactor!

[mtwilliams]

/*===-- wtk/app.h -------------------------------------------*- mode: C -*-===*\
|*                                                                            *|
|*                                    _   _                                   *|
|*                              _ _ _| |_| |_                                 *|
|*                             | | | |  _| '_|                                *|
|*                             |_____|_| |_,_|                                *|
|*                                                                            *|
|*       This file is distributed under the terms described in LICENSE.       *|
|*                                                                            *|
|*===----------------------------------------------------------------------===*|
|*                                                                            *|
|*                                                                            *|
|*                                                                            *|
\*===----------------------------------------------------------------------===*/

#ifndef _WTK_APP_H_
#define _WTK_APP_H_

/* #include "" */

WTK_BEGIN_EXTERN_C /* { */

/*! \copydoc wtk_app */
typedef struct wtk_app wtk_app_t;

/*! */
typedef (*wtk_app_on_quit_fn)(struct wtk_app *app);

/*! */
struct wtk_app {
  /*! \copydoc wtk_app_on_quit_fn */
  wtk_app_on_quit_fn on_quit;
};

/*! */
extern WTK_PUBLIC void wtk_app_init(struct wtk_app *app);

/*! */
extern WTK_PUBLIC void wtk_app_run(struct wtk_app *app); 

/*! */
extern WTK_PUBLIC void wtk_app_quit(struct wtk_app *app); 

WTK_END_EXTERN_C /* } */

#endif /* _WTK_APP_H_ */

/*===-- wtk/app.c -------------------------------------------*- mode: C -*-===*\
|*                                                                            *|
|*                                    _   _                                   *|
|*                              _ _ _| |_| |_                                 *|
|*                             | | | |  _| '_|                                *|
|*                             |_____|_| |_,_|                                *|
|*                                                                            *|
|*       This file is distributed under the terms described in LICENSE.       *|
|*                                                                            *|
|*===----------------------------------------------------------------------===*|
|*                                                                            *|
|*                                                                            *|
|*                                                                            *|
\*===----------------------------------------------------------------------===*/

#include "wtk/app.h"

#if WTK_PLATFORM == WTK_PLATFORM_WINDOWS
#  pragma comment(linker, "\"/manifestdependency:type='win32' name='Microsoft.Windows.Common-Controls' version='6.0.0.0' processorArchitecture='*' publicKeyToken='6595b64144ccf1df' language='*'\"")
#endif

WTK_BEGIN_EXTERN_C /* { */

static void _def_on_quit_handler(struct wtk_app *app) {
  wtk_assert_debug(app != (struct wtk_app *)NULL);
  exit(EXIT_SUCCESS);
}

void wtk_app_init(struct wtk_app *app) {
  wtk_assert_debug(app != (struct wtk_app *)NULL);
  app->on_quit = &_def_on_quit_handler;
#if WTK_PLATFORM == WTK_PLATFORM_WINDOWS
  /* Enable visual styles on Windows XP and later. */ {
    const DWORD dwVersion = GetVersion();
    const DWORD dwMinorVersion = (DWORD)(HIBYTE(LOWORD(dwVersion)));
    const DWORD dwMajorVersion = (DWORD)(LOBYTE(LOWORD(dwVersion)));
    if ((dwMajorVersion > 5) || ((dwMajorVersion == 5) && (dwMinorVersion >= 1))) {
      static const INITCOMMONCONTROLSEX iccx = {
        sizeof(INITCOMMONCONTROLSEX),
        ICC_BAR_CLASSES |
        ICC_HOTKEY_CLASS |
        ICC_INTERNET_CLASSES |
        ICC_LINK_CLASS |
        ICC_LISTVIEW_CLASSES |
        ICC_PROGRESS_CLASS |
        ICC_STANDARD_CLASSES |
        ICC_TAB_CLASSES |
        ICC_TREEVIEW_CLASSES
      };
      InitCommonControlsEx(&iccx);
    }
  }
#elif WTK_PLATFORM == WTK_PLATFORM_MAC_OS_X
#elif WTK_PLATFORM == WTK_PLATFORM_LINUX
#endif
}

void wtk_app_run(struct wtk_app *app) {
  wtk_assert_debug(app != (struct wtk_app *)NULL);
#if WTK_PLATFORM == WTK_PLATFORM_WINDOWS
  MSG msg;
  for (;;) {
    while (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE)) {
      if (msg.message == WM_QUIT)
        app->on_quit(app);
      TranslateMessage(&msg);
      DispatchMessage(&msg);
    }
  }
#elif WTK_PLATFORM == WTK_PLATFORM_MAC_OS_X
#elif WTK_PLATFORM == WTK_PLATFORM_LINUX
#endif
}

void wtk_app_quit(struct wtk_app *app) {
  wtk_assert_debug(app != (struct wtk_app *)NULL);
  wtk_assert_debug(app->on_quit != (wtk_app_on_quit_fn)NULL);
#if WTK_PLATFORM == WTK_PLATFORM_WINDOWS
  PostQuitMessage(0);
#elif WTK_PLATFORM == WTK_PLATFORM_MAC_OS_X
#elif WTK_PLATFORM == WTK_PLATFORM_LINUX
#endif
}

WTK_END_EXTERN_C /* } */

[mtwilliams]

We'll want to move off of the "duck typing" used for arguments. Rather, a fixed API should be provided.