#include "alfpriv.h"


TCHAR _alf_controlClass[28] = {0};

static LRESULT CALLBACK
ALF_Control_InitialWindowProc(HWND hwnd, UINT msg, WPARAM wparam, LPARAM lparam)
{
    if (msg == WM_NCCREATE) {
        ALFControlCreateParams *params = (ALFControlCreateParams *)((CREATESTRUCT *)lparam)->lpCreateParams;
        SetWindowLongPtr(hwnd, GWLP_WNDPROC, (LONG_PTR)params->windowProc);
        return params->windowProc(hwnd, msg, wparam, lparam);
    }

    return DefWindowProc(hwnd, msg, wparam, lparam);
}

void
ALF_RegisterControlClass(void)
{
    WNDCLASS cls;
    ZeroMemory(&cls, sizeof(cls));

    wsprintf(_alf_controlClass, TEXT("ALFControl.%p"), (ULONG_PTR)&_alf_controlClass[0]);

    cls.style = CS_DBLCLKS;
    cls.hInstance = ALF_HINSTANCE;
    cls.hCursor = LoadCursor(NULL, (LPTSTR)IDC_ARROW);
    cls.lpszClassName = _alf_controlClass;
    cls.cbWndExtra = sizeof(void*);
    cls.lpfnWndProc = ALF_Control_InitialWindowProc;

    ATOM classatom = RegisterClass(&cls);
    if (!classatom)
        MessageBox(NULL, TEXT("FATAL: Could not register control class"), NULL, MB_OK);
}

HWND
ALF_CreateControlWindow(DWORD exstyle, const TCHAR *text, DWORD style,
                        int x, int y, int w, int h, HWND parent, HMENU hmenu,
                        WNDPROC windowProc, void *param)
{
    ALFControlCreateParams p = { windowProc, param };
    return CreateWindowEx(exstyle,
                          _alf_controlClass,
                          text,
                          style,
                          x, y, w, h,
                          parent,
                          hmenu,
                          ALF_HINSTANCE,
                          &p);
}