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/* PDCurses */

#include 

/*man-start**************************************************************

window

------

### Synopsis

    WINDOW *newwin(int nlines, int ncols, int begy, int begx);

    WINDOW *derwin(WINDOW* orig, int nlines, int ncols,

                   int begy, int begx);

    WINDOW *subwin(WINDOW* orig, int nlines, int ncols,

                   int begy, int begx);

    WINDOW *dupwin(WINDOW *win);

    int delwin(WINDOW *win);

    int mvwin(WINDOW *win, int y, int x);

    int mvderwin(WINDOW *win, int pary, int parx);

    int syncok(WINDOW *win, bool bf);

    void wsyncup(WINDOW *win);

    void wcursyncup(WINDOW *win);

    void wsyncdown(WINDOW *win);

    WINDOW *resize_window(WINDOW *win, int nlines, int ncols);

    int wresize(WINDOW *win, int nlines, int ncols);

    WINDOW *PDC_makelines(WINDOW *win);

    WINDOW *PDC_makenew(int nlines, int ncols, int begy, int begx);

    void PDC_sync(WINDOW *win);

### Description

   newwin() creates a new window with the given number of lines, nlines

   and columns, ncols. The upper left corner of the window is at line

   begy, column begx. If nlines is zero, it defaults to LINES - begy;

   ncols to COLS - begx. Create a new full-screen window by calling

   newwin(0, 0, 0, 0).

   delwin() deletes the named window, freeing all associated memory. In

   the case of overlapping windows, subwindows should be deleted before

   the main window.

   mvwin() moves the window so that the upper left-hand corner is at

   position (y,x). If the move would cause the window to be off the

   screen, it is an error and the window is not moved. Moving subwindows

   is allowed.

   subwin() creates a new subwindow within a window. The dimensions of

   the subwindow are nlines lines and ncols columns. The subwindow is at

   position (begy, begx) on the screen. This position is relative to the

   screen, and not to the window orig. Changes made to either window

   will affect both. When using this routine, you will often need to

   call touchwin() before calling wrefresh().

   derwin() is the same as subwin(), except that begy and begx are

   relative to the origin of the window orig rather than the screen.

   There is no difference between subwindows and derived windows.

   mvderwin() moves a derived window (or subwindow) inside its parent

   window. The screen-relative parameters of the window are not changed.

   This routine is used to display different parts of the parent window

   at the same physical position on the screen.

   dupwin() creates an exact duplicate of the window win.

   wsyncup() causes a touchwin() of all of the window's parents.

   If wsyncok() is called with a second argument of TRUE, this causes a

   wsyncup() to be called every time the window is changed.

   wcursyncup() causes the current cursor position of all of a window's

   ancestors to reflect the current cursor position of the current

   window.

   wsyncdown() causes a touchwin() of the current window if any of its

   parent's windows have been touched.

   resize_window() allows the user to resize an existing window. It

   returns the pointer to the new window, or NULL on failure.

   wresize() is an ncurses-compatible wrapper for resize_window(). Note

   that, unlike ncurses, it will NOT process any subwindows of the

   window. (However, you still can call it _on_ subwindows.) It returns

   OK or ERR.

   PDC_makenew() allocates all data for a new WINDOW * except the actual

   lines themselves. If it's unable to allocate memory for the window

   structure, it will free all allocated memory and return a NULL

   pointer.

   PDC_makelines() allocates the memory for the lines.

   PDC_sync() handles wrefresh() and wsyncup() calls when a window is

   changed.

### Return Value

   newwin(), subwin(), derwin() and dupwin() return a pointer to the new

   window, or NULL on failure. delwin(), mvwin(), mvderwin() and

   syncok() return OK or ERR. wsyncup(), wcursyncup() and wsyncdown()

   return nothing.

### Errors

   It is an error to call resize_window() before calling initscr().

   Also, an error will be generated if we fail to create a newly sized

   replacement window for curscr, or stdscr. This could happen when

   increasing the window size. NOTE: If this happens, the previously

   successfully allocated windows are left alone; i.e., the resize is

   NOT cancelled for those windows.

### Portability

                             X/Open  ncurses  NetBSD

    newwin                      Y       Y       Y

    delwin                      Y       Y       Y

    mvwin                       Y       Y       Y

    subwin                      Y       Y       Y

    derwin                      Y       Y       Y

    mvderwin                    Y       Y       Y

    dupwin                      Y       Y       Y

    wsyncup                     Y       Y       Y

    syncok                      Y       Y       Y

    wcursyncup                  Y       Y       Y

    wsyncdown                   Y       Y       Y

    wresize                     -       Y       Y

    resize_window               -       -       -

    PDC_makelines               -       -       -

    PDC_makenew                 -       -       -

    PDC_sync                    -       -       -

**man-end****************************************************************/

#include 

WINDOW *PDC_makenew(int nlines, int ncols, int begy, int begx)

{

    WINDOW *win;

    PDC_LOG(("PDC_makenew() - called: lines %d cols %d begy %d begx %d\n",

             nlines, ncols, begy, begx));

    /* allocate the window structure itself */

    win = calloc(1, sizeof(WINDOW));

    if (!win)

        return win;

    /* allocate the line pointer array */

    win->_y = malloc(nlines * sizeof(chtype *));

    if (!win->_y)

    {

        free(win);

        return (WINDOW *)NULL;

    }

    /* allocate the minchng and maxchng arrays */

    win->_firstch = malloc(nlines * sizeof(int));

    if (!win->_firstch)

    {

        free(win->_y);

        free(win);

        return (WINDOW *)NULL;

    }

    win->_lastch = malloc(nlines * sizeof(int));

    if (!win->_lastch)

    {

        free(win->_firstch);

        free(win->_y);

        free(win);

        return (WINDOW *)NULL;

    }

    /* initialize window variables */

    win->_maxy = nlines;  /* real max screen size */

    win->_maxx = ncols;   /* real max screen size */

    win->_begy = begy;

    win->_begx = begx;

    win->_bkgd = ' ';     /* wrs 4/10/93 -- initialize background to blank */

    win->_clear = (bool) ((nlines == LINES) && (ncols == COLS));

    win->_bmarg = nlines - 1;

    win->_parx = win->_pary = -1;

    /* init to say window all changed */

    touchwin(win);

    return win;

}

WINDOW *PDC_makelines(WINDOW *win)

{

    int i, j, nlines, ncols;

    PDC_LOG(("PDC_makelines() - called\n"));

    if (!win)

        return (WINDOW *)NULL;

    nlines = win->_maxy;

    ncols = win->_maxx;

    for (i = 0; i < nlines; i++)

    {

        win->_y[i] = malloc(ncols * sizeof(chtype));

        if (!win->_y[i])

        {

            /* if error, free all the data */

            for (j = 0; j < i; j++)

                free(win->_y[j]);

            free(win->_firstch);

            free(win->_lastch);

            free(win->_y);

            free(win);

            return (WINDOW *)NULL;

        }

    }

    return win;

}

void PDC_sync(WINDOW *win)

{

    PDC_LOG(("PDC_sync() - called:\n"));

    if (win->_immed)

        wrefresh(win);

    if (win->_sync)

        wsyncup(win);

}

WINDOW *newwin(int nlines, int ncols, int begy, int begx)

{

    WINDOW *win;

    PDC_LOG(("newwin() - called:lines=%d cols=%d begy=%d begx=%d\n",

             nlines, ncols, begy, begx));

    if (!nlines)

        nlines = LINES - begy;

    if (!ncols)

        ncols  = COLS  - begx;

    if (!SP || begy + nlines > SP->lines || begx + ncols > SP->cols)

        return (WINDOW *)NULL;

    win = PDC_makenew(nlines, ncols, begy, begx);

    if (win)

        win = PDC_makelines(win);

    if (win)

        werase(win);

    return win;

}

int delwin(WINDOW *win)

{

    int i;

    PDC_LOG(("delwin() - called\n"));

    if (!win)

        return ERR;

    /* subwindows use parents' lines */

    if (!(win->_flags & (_SUBWIN|_SUBPAD)))

        for (i = 0; i < win->_maxy && win->_y[i]; i++)

            if (win->_y[i])

                free(win->_y[i]);

    free(win->_firstch);

    free(win->_lastch);

    free(win->_y);

    free(win);

    return OK;

}

int mvwin(WINDOW *win, int y, int x)

{

    PDC_LOG(("mvwin() - called\n"));

    if (!win || (y + win->_maxy > LINES || y < 0)

             || (x + win->_maxx > COLS || x < 0))

        return ERR;

    win->_begy = y;

    win->_begx = x;

    touchwin(win);

    return OK;

}

WINDOW *subwin(WINDOW *orig, int nlines, int ncols, int begy, int begx)

{

    WINDOW *win;

    int i, j, k;

    PDC_LOG(("subwin() - called: lines %d cols %d begy %d begx %d\n",

             nlines, ncols, begy, begx));

    /* make sure window fits inside the original one */

    if (!orig || (begy < orig->_begy) || (begx < orig->_begx) ||

        (begy + nlines) > (orig->_begy + orig->_maxy) ||

        (begx + ncols) > (orig->_begx + orig->_maxx))

        return (WINDOW *)NULL;

    j = begy - orig->_begy;

    k = begx - orig->_begx;

    if (!nlines)

        nlines = orig->_maxy - 1 - j;

    if (!ncols)

        ncols  = orig->_maxx - 1 - k;

    win = PDC_makenew(nlines, ncols, begy, begx);

    if (!win)

        return (WINDOW *)NULL;

    /* initialize window variables */

    win->_attrs = orig->_attrs;

    win->_bkgd = orig->_bkgd;

    win->_leaveit = orig->_leaveit;

    win->_scroll = orig->_scroll;

    win->_nodelay = orig->_nodelay;

    win->_delayms = orig->_delayms;

    win->_use_keypad = orig->_use_keypad;

    win->_immed = orig->_immed;

    win->_sync = orig->_sync;

    win->_pary = j;

    win->_parx = k;

    win->_parent = orig;

    for (i = 0; i < nlines; i++, j++)

        win->_y[i] = orig->_y[j] + k;

    win->_flags |= _SUBWIN;

    return win;

}

WINDOW *derwin(WINDOW *orig, int nlines, int ncols, int begy, int begx)

{

    return subwin(orig, nlines, ncols, begy + orig->_begy, begx + orig->_begx);

}

int mvderwin(WINDOW *win, int pary, int parx)

{

    int i, j;

    WINDOW *mypar;

    if (!win || !(win->_parent))

        return ERR;

    mypar = win->_parent;

    if (pary < 0 || parx < 0 || (pary + win->_maxy) > mypar->_maxy ||

                                (parx + win->_maxx) > mypar->_maxx)

        return ERR;

    j = pary;

    for (i = 0; i < win->_maxy; i++)

        win->_y[i] = (mypar->_y[j++]) + parx;

    win->_pary = pary;

    win->_parx = parx;

    return OK;

}

WINDOW *dupwin(WINDOW *win)

{

    WINDOW *new;

    chtype *ptr, *ptr1;

    int nlines, ncols, begy, begx, i;

    if (!win)

        return (WINDOW *)NULL;

    nlines = win->_maxy;

    ncols = win->_maxx;

    begy = win->_begy;

    begx = win->_begx;

    new = PDC_makenew(nlines, ncols, begy, begx);

    if (new)

        new = PDC_makelines(new);

    if (!new)

        return (WINDOW *)NULL;

    /* copy the contents of win into new */

    for (i = 0; i < nlines; i++)

    {

        for (ptr = new->_y[i], ptr1 = win->_y[i];

             ptr < new->_y[i] + ncols; ptr++, ptr1++)

            *ptr = *ptr1;

        new->_firstch[i] = 0;

        new->_lastch[i] = ncols - 1;

    }

    new->_curx = win->_curx;

    new->_cury = win->_cury;

    new->_maxy = win->_maxy;

    new->_maxx = win->_maxx;

    new->_begy = win->_begy;

    new->_begx = win->_begx;

    new->_flags = win->_flags;

    new->_attrs = win->_attrs;

    new->_clear = win->_clear;

    new->_leaveit = win->_leaveit;

    new->_scroll = win->_scroll;

    new->_nodelay = win->_nodelay;

    new->_delayms = win->_delayms;

    new->_use_keypad = win->_use_keypad;

    new->_tmarg = win->_tmarg;

    new->_bmarg = win->_bmarg;

    new->_parx = win->_parx;

    new->_pary = win->_pary;

    new->_parent = win->_parent;

    new->_bkgd = win->_bkgd;

    new->_flags = win->_flags;

    return new;

}

WINDOW *resize_window(WINDOW *win, int nlines, int ncols)

{

    WINDOW *new;

    int i, save_cury, save_curx, new_begy, new_begx;

    PDC_LOG(("resize_window() - called: nlines %d ncols %d\n",

             nlines, ncols));

    if (!win || !SP)

        return (WINDOW *)NULL;

    if (win->_flags & _SUBPAD)

    {

        new = subpad(win->_parent, nlines, ncols, win->_begy, win->_begx);

        if (!new)

            return (WINDOW *)NULL;

    }

    else if (win->_flags & _SUBWIN)

    {

        new = subwin(win->_parent, nlines, ncols, win->_begy, win->_begx);

        if (!new)

            return (WINDOW *)NULL;

    }

    else

    {

        if (win == SP->slk_winptr)

        {

            new_begy = SP->lines - SP->slklines;

            new_begx = 0;

        }

        else

        {

            new_begy = win->_begy;

            new_begx = win->_begx;

        }

        new = PDC_makenew(nlines, ncols, new_begy, new_begx);

        if (!new)

            return (WINDOW *)NULL;

    }

    save_curx = min(win->_curx, (new->_maxx - 1));

    save_cury = min(win->_cury, (new->_maxy - 1));

    if (!(win->_flags & (_SUBPAD|_SUBWIN)))

    {

        new = PDC_makelines(new);

        if (!new)

            return (WINDOW *)NULL;

        werase(new);

        copywin(win, new, 0, 0, 0, 0, min(win->_maxy, new->_maxy) - 1,

                min(win->_maxx, new->_maxx) - 1, FALSE);

        for (i = 0; i < win->_maxy && win->_y[i]; i++)

            if (win->_y[i])

                free(win->_y[i]);

    }

    new->_flags = win->_flags;

    new->_attrs = win->_attrs;

    new->_clear = win->_clear;

    new->_leaveit = win->_leaveit;

    new->_scroll = win->_scroll;

    new->_nodelay = win->_nodelay;

    new->_delayms = win->_delayms;

    new->_use_keypad = win->_use_keypad;

    new->_tmarg = (win->_tmarg > new->_maxy - 1) ? 0 : win->_tmarg;

    new->_bmarg = (win->_bmarg == win->_maxy - 1) ?

                  new->_maxy - 1 : min(win->_bmarg, (new->_maxy - 1));

    new->_parent = win->_parent;

    new->_immed = win->_immed;

    new->_sync = win->_sync;

    new->_bkgd = win->_bkgd;

    new->_curx = save_curx;

    new->_cury = save_cury;

    free(win->_firstch);

    free(win->_lastch);

    free(win->_y);

    *win = *new;

    free(new);

    return win;

}

int wresize(WINDOW *win, int nlines, int ncols)

{

    return (resize_window(win, nlines, ncols) ? OK : ERR);

}

void wsyncup(WINDOW *win)

{

    WINDOW *tmp;

    PDC_LOG(("wsyncup() - called\n"));

    for (tmp = win; tmp; tmp = tmp->_parent)

        touchwin(tmp);

}

int syncok(WINDOW *win, bool bf)

{

    PDC_LOG(("syncok() - called\n"));

    if (!win)

        return ERR;

    win->_sync = bf;

    return OK;

}

void wcursyncup(WINDOW *win)

{

    WINDOW *tmp;

    PDC_LOG(("wcursyncup() - called\n"));

    for (tmp = win; tmp && tmp->_parent; tmp = tmp->_parent)

        wmove(tmp->_parent, tmp->_pary + tmp->_cury, tmp->_parx + tmp->_curx);

}

void wsyncdown(WINDOW *win)

{

    WINDOW *tmp;

    PDC_LOG(("wsyncdown() - called\n"));

    for (tmp = win; tmp; tmp = tmp->_parent)

    {

        if (is_wintouched(tmp))

        {

            touchwin(win);

            break;

        }

    }

}