Fix bug #12927 with scrolling under hl-line-mode and scroll-conservatively.

[emacs.git] / oldXMenu / Internal.c

/* Copyright    Massachusetts Institute of Technology    1985   */

#include "copyright.h"

/*
Copyright (C) 1993, 1996, 2001-2012  Free Software Foundation, Inc.

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program 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 General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.  */


/*
 * XMenu:       MIT Project Athena, X Window system menu package
 *
 *      XMenuInternal.c - XMenu internal (not user visible) routines.
 *
 *      Author:         Tony Della Fera, DEC
 *                      November, 1985
 *
 */

#include <config.h>
#include "XMenuInt.h"

/*
 * Internal Window creation queue sizes.
 */
#define S_QUE_SIZE      300
#define P_QUE_SIZE      20


/*
 * XMWinQue - Internal window creation queue datatype.
 */
typedef struct _xmwinquedef {
    int sq_size;
    XMSelect *sq[S_QUE_SIZE];
    XMSelect **sq_ptr;
    int pq_size;
    XMPane *pq[P_QUE_SIZE];
    XMPane **pq_ptr;
} XMWinQue;

/*
 * _XMWinQue - Internal static window creation queue.
 */
static Bool _XMWinQueIsInit = False;
static XMWinQue _XMWinQue;

/*
 * _XMErrorCode - Global XMenu error code.
 */
int _XMErrorCode = XME_NO_ERROR;
/*
 * _XMErrorList - Global XMenu error code description strings.
 */
char const *const
_XMErrorList[XME_CODE_COUNT] = {
    "No error",                         /* XME_NO_ERROR */
    "Menu not initialized",             /* XME_NOT_INIT */
    "Argument out of bounds",           /* XME_ARG_BOUNDS */
    "Pane not found",                   /* XME_P_NOT_FOUND */
    "Selection not found",              /* XME_S_NOT_FOUND */
    "Invalid menu style parameter",     /* XME_STYLE_PARAM */
    "Unable to grab mouse",             /* XME_GRAB_MOUSE */
    "Unable to interpret locator",      /* XME_INTERP_LOC */
    "Unable to calloc memory",          /* XME_CALLOC */
    "Unable to create XAssocTable",     /* XME_CREATE_ASSOC */
    "Unable to store bitmap",           /* XME_STORE_BITMAP */
    "Unable to make tile pixmaps",      /* XME_MAKE_TILES */
    "Unable to make pixmap",            /* XME_MAKE_PIXMAP */
    "Unable to create cursor",          /* XME_CREATE_CURSOR */
    "Unable to open font",              /* XME_OPEN_FONT */
    "Unable to create windows",         /* XME_CREATE_WINDOW */
    "Unable to create transparencies",  /* XME_CREATE_TRANSP */
};

/*
 * _XMEventHandler - Internal event handler variable.
 */
int (*_XMEventHandler)(XEvent*) = NULL;



/*
 * _XMWinQueInit - Internal routine to initialize the window
 *                 queue.
 */
void
_XMWinQueInit(void)
{
    /*
     * If the queue is not initialized initialize it.
     */
    if (!_XMWinQueIsInit) {
        /*
         * Blank the queue structure.
         */
        register int i;

        for (i = 0; i < S_QUE_SIZE; i++)
          _XMWinQue.sq[i] = 0;

        for (i = 0; i < P_QUE_SIZE; i++)
          _XMWinQue.pq[i] = 0;

        _XMWinQue.sq_size = _XMWinQue.pq_size = 0;

        /*
         * Initialize the next free location pointers.
         */
        _XMWinQue.sq_ptr = _XMWinQue.sq;
        _XMWinQue.pq_ptr = _XMWinQue.pq;
    }
}



/*
 * _XMWinQueAddPane - Internal routine to add a pane to the pane
 *                    window queue.
 */
int
_XMWinQueAddPane(register Display *display, register XMenu *menu, register XMPane *p_ptr)

                                /* Menu being manipulated. */
                                /* XMPane being queued. */
{
    /*
     * If the queue is currently full then flush it.
     */
    if (_XMWinQue.pq_size == P_QUE_SIZE) {
        if (_XMWinQueFlush(display, menu, 0, 0) == _FAILURE) return(_FAILURE);
    }

    /*
     * Insert the new XMPane pointer and increment the queue pointer
     * and the queue size.
     */
    *_XMWinQue.pq_ptr = p_ptr;
    _XMWinQue.pq_ptr++;
    _XMWinQue.pq_size++;

    /*
     * All went well, return successfully.
     */
    _XMErrorCode = XME_NO_ERROR;
    return(_SUCCESS);
}



/*
 * _XMWinQueAddSelection - Internal routine to add a selection to
 *                         the selection window queue.
 */
int
_XMWinQueAddSelection(register Display *display, register XMenu *menu, register XMSelect *s_ptr)

                                /* Menu being manipulated. */
                                /* XMSelection being queued. */
{
    /*
     * If this entry will overflow the queue then flush it.
     */
    if (_XMWinQue.sq_size == S_QUE_SIZE) {
        if (_XMWinQueFlush(display, menu, 0, 0) == _FAILURE) return(_FAILURE);
    }

    /*
     * Insert the new XMSelect pointer and increment the queue pointer
     * and the queue size.
     */
    *_XMWinQue.sq_ptr = s_ptr;
    _XMWinQue.sq_ptr++;
    _XMWinQue.sq_size++;

    /*
     * All went well, return successfully.
     */
    _XMErrorCode = XME_NO_ERROR;
    return(_SUCCESS);
}



/*
 * _XMWinQueFlush - Internal routine to flush the pane and
 *                  selection window queues.
 */
int
_XMWinQueFlush(register Display *display, register XMenu *menu, register XMPane *pane, XMSelect *sel)

                                        /* Menu being manipulated. */
                                        /* Current pane. */
{
    register int pq_index;              /* Pane queue index. */
    register int sq_index;              /* Selection queue index. */
    register XMPane *p_ptr;             /* XMPane pointer. */
    register XMSelect *s_ptr;           /* XMSelect pointer. */
    unsigned long valuemask;            /* Which attributes to set. */
    XSetWindowAttributes attributes_buf; /* Attributes to be set. */
    XSetWindowAttributes *attributes = &attributes_buf;

    /*
     * If the pane window queue is not empty...
     */

    if (_XMWinQue.pq_size > 0) {
        /*
         * set up attributes for pane window to be created.
         */
        valuemask = (CWBackPixmap | CWBorderPixel | CWOverrideRedirect);
        attributes->border_pixel = menu->p_bdr_color;
        attributes->background_pixmap = menu->inact_pixmap;
        attributes->override_redirect = True;

        /*
         * Create all the pending panes in order, so that the
         * current pane will be on top, with the others
         * stacked appropriately under it.
         */
        for (pq_index = _XMWinQue.pq_size - 1;
             pq_index >= 0;
             pq_index--)
          {
              p_ptr = _XMWinQue.pq[pq_index];  /* Retrieve next pane. */
              if (p_ptr == pane) break;
              p_ptr->window = XCreateWindow(display,
                                            menu->parent,
                                            p_ptr->window_x,
                                            p_ptr->window_y,
                                            p_ptr->window_w,
                                            p_ptr->window_h,
                                            menu->p_bdr_width,
                                            CopyFromParent,
                                            InputOutput,
                                            CopyFromParent,
                                            valuemask,
                                            attributes);
              XMakeAssoc(display, menu->assoc_tab, p_ptr->window, p_ptr);
              XSelectInput(display, p_ptr->window, menu->p_events);
          }
        for (pq_index = 0;
             pq_index < _XMWinQue.pq_size;
             pq_index++)
          {
              p_ptr = _XMWinQue.pq[pq_index];   /* Retrieve next pane. */
              p_ptr->window = XCreateWindow(display,
                                            menu->parent,
                                            p_ptr->window_x,
                                            p_ptr->window_y,
                                            p_ptr->window_w,
                                            p_ptr->window_h,
                                            menu->p_bdr_width,
                                            CopyFromParent,
                                            InputOutput,
                                            CopyFromParent,
                                            valuemask,
                                            attributes);
              XMakeAssoc(display, menu->assoc_tab, p_ptr->window, p_ptr);
              XSelectInput(display, p_ptr->window, menu->p_events);
              if (p_ptr == pane) break;
        }

        /*
         * Reset the pane queue pointer and size.
         */
        _XMWinQue.pq_size = 0;
        _XMWinQue.pq_ptr = _XMWinQue.pq;
    }

    /*
     * If the selection window queue is not empty...
     */

    if (_XMWinQue.sq_size > 0) {

        for (sq_index = 0; sq_index < _XMWinQue.sq_size; sq_index++) {
            /*
             * Retrieve the XMSelect pointer.
             */
            s_ptr = _XMWinQue.sq[sq_index];
            s_ptr->window = XCreateWindow(display,
                                   s_ptr->parent_p->window,
                                   s_ptr->window_x,
                                   s_ptr->window_y,
                                   s_ptr->window_w,
                                   s_ptr->window_h,
                                   0,                /* border width*/
                                   CopyFromParent,
                                   InputOnly,
                                   CopyFromParent,
                                   0,
                                   attributes);

            /*
             * Insert the new window id and its
             * associated XMSelect structure into the
             * association table.
             */
            XMakeAssoc(display, menu->assoc_tab, s_ptr->window, s_ptr);
            XSelectInput(display, s_ptr->window, menu->s_events);
        }

        /*
         * Reset the selection queue pointer and size.
         */
        _XMWinQue.sq_size = 0;
        _XMWinQue.sq_ptr = _XMWinQue.sq;
    }

    /*
     * Flush X's internal queues.
     */
    XFlush(display);

    /*
     * All went well, return successfully.
     */
    _XMErrorCode = XME_NO_ERROR;
    return(_SUCCESS);
}



/*
 * _XMGetPanePtr -      Given a menu pointer and a pane index number, return
 *                      a pane pointer that points to the indexed pane.
 */
XMPane *
_XMGetPanePtr(register XMenu *menu, register int p_num)
                                /* Menu to find the pane in. */
                                /* Index number of pane to find. */
{
    register XMPane *p_ptr;     /* Pane pointer to be returned. */
    register int i;             /* Loop counter. */

    /*
     * Is the pane number out of range?
     */
    if ((p_num < 0) || (p_num > (menu->p_count - 1))) {
        _XMErrorCode = XME_P_NOT_FOUND;
        return(NULL);
    }

    /*
     * Find the right pane.
     */
    p_ptr = menu->p_list->next;
    for (i = 0; i < p_num; i++) p_ptr = p_ptr->next;

    /*
     * Return successfully.
     */
    _XMErrorCode = XME_NO_ERROR;
    return(p_ptr);
}



/*
 * _XMGetSelectionPtr - Given pane pointer and a selection index number,
 *                      return a selection pointer that points to the
 *                      indexed selection.
 */
XMSelect *
_XMGetSelectionPtr(register XMPane *p_ptr, register int s_num)
                                /* Pane to find the selection in. */
                                /* Index number of the selection to find. */
{
    register XMSelect *s_ptr;   /* Selection pointer to be returned. */
    register int i;             /* Loop counter. */

    /*
     * Is the selection number out of range?
     */
    if ((s_num < 0) || (s_num > (p_ptr->s_count - 1))) {
        _XMErrorCode = XME_S_NOT_FOUND;
        return(NULL);
    }

    /*
     * Find the right selection.
     */
    s_ptr = p_ptr->s_list->next;
    for (i = 0; i < s_num; i++) s_ptr = s_ptr->next;

    /*
     * Return successfully.
     */
    _XMErrorCode = XME_NO_ERROR;
    return(s_ptr);
}



/*
 * _XMRecomputeGlobals - Internal subroutine to recompute menu wide
 *                       global values.
 */
void
_XMRecomputeGlobals(register Display *display, register XMenu *menu)
                               /*X11 display variable. */
                                /* Menu object to compute from. */
{
    register XMPane *p_ptr;     /* Pane pointer. */
    register XMSelect *s_ptr;   /* Selection pointer. */

    register int max_p_label = 0;       /* Maximum pane label width. */
    register int max_s_label = 0;       /* Maximum selection label width. */
    register int s_count = 0;           /* Maximum selection count. */

    int p_s_pad;                /* Pane <-> selection padding. */
    int p_s_diff;               /* Pane <-> selection separation. */

    int p_height;               /* Pane window height. */
    int p_width;                /* Pane window width. */
    int s_width;                /* Selection window width. */

    int screen;                 /* DefaultScreen holder. */

    /*
     * For each pane...
     */
    for (
        p_ptr = menu->p_list->next;
        p_ptr != menu->p_list;
        p_ptr = p_ptr->next
    ){

        /*
         * Recompute maximum pane label width.
         */
        max_p_label = max(max_p_label, p_ptr->label_width);

        /*
         * Recompute maximum selection count.
         */
        s_count = max(s_count, p_ptr->s_count);

        /*
         * For each selection in the current pane...
         */
        for (
            s_ptr = p_ptr->s_list->next;
            s_ptr != p_ptr->s_list;
            s_ptr = s_ptr->next
        ){

            /*
             * Recompute maximum selection label width.
             */
            max_s_label = max(max_s_label, s_ptr->label_width);
        }
    }

    /*
     * Recompute pane height.
     */
    p_height = (menu->flag_height << 1) + (menu->s_y_off * s_count);

    /*
     * Recompute horizontal padding between the pane window and the
     * selection windows.
     */
    p_s_pad = menu->p_x_off << 1;

    /*
     * Recompute pane and selection window widths.
     * This is done by first computing the window sizes from the maximum
     * label widths.  If the spacing between the selection window and the
     * containing pane window is less than the pane selection padding value
     * (twice the pane X offset) then change the size of the pane to be
     * the size of the selection window plus the padding.  If, however the
     * spacing between the selection window and the containing pane window
     * is more than the pane selection padding value increase the size of
     * the selection to its maximum possible value (the pane width minus
     * the pane selection padding value).
     */
    p_width = max_p_label + p_s_pad;
    s_width = max_s_label + (menu->s_fnt_pad << 1) + (menu->s_bdr_width << 1);
    p_s_diff = p_width - s_width;
    if (p_s_diff < p_s_pad) {
        p_width = s_width + p_s_pad;
    }
    else if (p_s_diff > p_s_pad) {
        s_width = p_width - p_s_pad;
    }

    /*
     * Reset menu wide global values.
     */
    menu->s_count = s_count;
    menu->p_height = p_height;
    menu->p_width = p_width;
    menu->s_width = s_width;

    /*
     * Ensure that the origin of the menu is placed so that
     * None of the panes ore selections are off the screen.
     */
    screen = DefaultScreen(display);
    if (menu->x_pos + menu->width > DisplayWidth(display, screen))
            menu->x_pos = DisplayWidth(display, screen) - menu->width;
    else if (menu->x_pos < 0) menu->x_pos = 0;
    if(menu->y_pos + menu->height > DisplayHeight(display, screen))
            menu->y_pos = DisplayHeight(display, screen) - menu->height;
    else if (menu->y_pos < 0) menu->y_pos = 0;
}


/*
 * _XMRecomputePane - Internal subroutine to recompute pane
 *                    window dependencies.
 */
int
_XMRecomputePane(register Display *display, register XMenu *menu, register XMPane *p_ptr, register int p_num)
                                /* Standard X display variable. */
                                /* Menu object being recomputed. */
                                /* Pane pointer. */
                                /* Pane sequence number. */
{
    register int window_x;      /* Recomputed window X coordinate. */
    register int window_y;      /* Recomputed window Y coordinate. */

    unsigned long change_mask;  /* Value mask to reconfigure window. */
    XWindowChanges *changes;    /* Values to use in configure window. */

    register Bool config_p = False;     /* Reconfigure pane window? */

    /*
     * Update the pane serial number.
     */
    p_ptr->serial = p_num;

    /*
     * Recompute window X and Y coordinates.
     */
    switch (menu->menu_style) {
        case LEFT:
            window_x = menu->p_x_off * ((menu->p_count - 1) - p_num);
            window_y = menu->p_y_off * ((menu->p_count - 1) - p_num);
            break;
        case RIGHT:
            window_x = menu->p_x_off * p_num;
            window_y = menu->p_y_off * ((menu->p_count - 1) - p_num);
            break;
        case CENTER:
            window_x = 0;
            window_y = menu->p_y_off * ((menu->p_count - 1) - p_num);
            break;
        default:
            /* Error! Invalid style parameter. */
            _XMErrorCode = XME_STYLE_PARAM;
            return(_FAILURE);
    }
    window_x += menu->x_pos;
    window_y += menu->y_pos;

    /*
     * If the newly compute pane coordinates differ from the
     * current coordinates, reset the current coordinates and
     * reconfigure the pane.
     */
    if (
        (window_x != p_ptr->window_x) ||
        (window_y != p_ptr->window_y)
    ){
        /*
         * Reset the coordinates and schedule
         * the pane for reconfiguration.
         */
        p_ptr->window_x = window_x;
        p_ptr->window_y = window_y;
        config_p = True;
    }

    /*
     * If the local pane width and height differs from the
     * menu pane width and height, reset the local values.
     */
    if (
        (p_ptr->window_w != menu->p_width) ||
        (p_ptr->window_h != menu->p_height)
    ){
        /*
         * Reset window width and height and schedule
         * the pane for reconfiguration.
         */
        p_ptr->window_w = menu->p_width;
        p_ptr->window_h = menu->p_height;
        config_p = True;
    }

    /*
     * If we need to reconfigure the pane window do it now.
     */
    if (config_p == True) {
        /*
         * If the pane window has already been created then
         * reconfigure the existing window, otherwise queue
         * it for creation with the new configuration.
         */
        if (p_ptr->window) {
            change_mask = (CWX | CWY | CWWidth | CWHeight);
            changes = (XWindowChanges *)malloc(sizeof(XWindowChanges));
            changes->x = p_ptr->window_x;
            changes->y = p_ptr->window_y;
            changes->width = p_ptr->window_w;
            changes->height = p_ptr->window_h;

            XConfigureWindow(
                             display,
                             p_ptr->window,
                             change_mask,
                             changes
                             );
            free(changes);

        }
        else {
            if (_XMWinQueAddPane(display, menu, p_ptr) == _FAILURE) {
                return(_FAILURE);
            }
        }
    }

    /*
     * Recompute label X position.
     */
    switch (menu->p_style) {
        case LEFT:
            p_ptr->label_x = menu->p_x_off + menu->p_fnt_pad;
            break;
        case RIGHT:
            p_ptr->label_x = menu->p_width -
                (p_ptr->label_width + menu->p_x_off + menu->p_fnt_pad);
            break;
        case CENTER:
            p_ptr->label_x = (menu->p_width - p_ptr->label_width) >> 1;
            break;
        default:
            /* Error! Invalid style parameter. */
            _XMErrorCode = XME_STYLE_PARAM;
            return(_FAILURE);
    }
    /*
     * Recompute label Y positions.
     */
    p_ptr->label_uy = menu->p_fnt_pad + menu->p_fnt_info->max_bounds.ascent;
    p_ptr->label_ly = (menu->p_height - menu->p_fnt_pad - menu->p_fnt_info->max_bounds.descent);

    /*
     * All went well, return successfully.
     */
    _XMErrorCode = XME_NO_ERROR;
    return(_SUCCESS);
}



/*
 * _XMRecomputeSelection - Internal subroutine to recompute
 *                         selection window dependencies.
 */
int
_XMRecomputeSelection(register Display *display, register XMenu *menu, register XMSelect *s_ptr, register int s_num)

                                /* Menu object being recomputed. */
                                /* Selection pointer. */
                                /* Selection sequence number. */
{
    register Bool config_s = False;     /* Reconfigure selection window? */
    XWindowChanges *changes;            /* Values to change in configure. */
    unsigned long change_mask;          /* Value mask for XConfigureWindow. */

    /*
     * If the selection serial numbers are out of order, begin
     * resequencing selections.  Recompute selection window coordinates
     * and serial number.
     *
     * When selections are created they are given a serial number of
     * -1, this causes this routine to give a new selection
     * its initial coordinates and serial number.
     */
    if (s_ptr->serial != s_num) {
        /*
         * Fix the sequence number.
         */
        s_ptr->serial = s_num;
        /*
         * Recompute window X and Y coordinates.
         */
        s_ptr->window_x = menu->s_x_off;
        s_ptr->window_y = menu->flag_height + (menu->s_y_off * s_num);
        /*
         * We must reconfigure the window.
         */
        config_s = True;
    }

    /*
     * If the local selection width and height differs from the
     * menu selection width and height, reset the local values.
     */
    if (
        (s_ptr->window_w != menu->s_width) ||
        (s_ptr->window_h != menu->s_height)
    ){
        /*
         * We must reconfigure the window.
         */
        config_s = True;
        /*
         * Reset window width and height.
         */
        s_ptr->window_w = menu->s_width;
        s_ptr->window_h = menu->s_height;
    }

    /*
     * If we need to reconfigure the selection window do it now.
     */
    if (config_s == True) {
        /*
         * If the selection window has already been created then
         * reconfigure the existing window, otherwise queue it
         * for creation with the new configuration.
         */
        if (s_ptr->window) {
            changes = (XWindowChanges *)malloc(sizeof(XWindowChanges));
            change_mask = (CWX | CWY | CWWidth | CWHeight);
            changes = (XWindowChanges *)malloc(sizeof(XWindowChanges));
            changes->x = s_ptr->window_x;
            changes->y = s_ptr->window_y;
            changes->width = s_ptr->window_w;
            changes->height = s_ptr->window_h;

            XConfigureWindow(
                             display,
                             s_ptr->window,
                             change_mask,
                             changes
                             );
            free(changes);

        }
        else {
            if (_XMWinQueAddSelection(display, menu, s_ptr) == _FAILURE) {
                return(_FAILURE);
            }
        }
    }

    /*
     * Recompute label X position.
     */
    switch (menu->s_style) {
        case LEFT:
            s_ptr->label_x = menu->s_bdr_width + menu->s_fnt_pad + s_ptr->window_x;
            break;
        case RIGHT:
            s_ptr->label_x = s_ptr->window_x + menu->s_width -
                (s_ptr->label_width + menu->s_bdr_width + menu->s_fnt_pad);
            break;
        case CENTER:
            s_ptr->label_x = s_ptr->window_x + ((menu->s_width - s_ptr->label_width) >> 1);
            break;
        default:
            /* Error! Invalid style parameter. */
            _XMErrorCode = XME_STYLE_PARAM;
            return(_FAILURE);
    }
    /*
     * Recompute label Y position.
     */
    s_ptr->label_y = s_ptr->window_y + menu->s_fnt_info->max_bounds.ascent + menu->s_fnt_pad + menu->s_bdr_width;

    /*
     * All went well, return successfully.
     */
    _XMErrorCode = XME_NO_ERROR;
    return(_SUCCESS);
}



/*
 * _XMTransToOrigin - Internal subroutine to translate the point at
 *                    the center of the current pane and selection to the
 *                    the menu origin.
 *
 *      WARNING! ****** Be certain that all menu dependencies have been
 *                      recomputed before calling this routine or
 *                      unpredictable results will follow.
 */
void
_XMTransToOrigin(Display *display, register XMenu *menu, register XMPane *p_ptr, register XMSelect *s_ptr, int x_pos, int y_pos, int *orig_x, int *orig_y)
                                /* Not used. Included for consistency. */
                                /* Menu being computed against. */
                                /* Current pane pointer. */
                                /* Current selection pointer. */
                                /* X coordinate of point to translate. */
                                /* Y coordinate of point to translate. */
                                /* Return value X coord. of the menu origin. */
                                /* Return value Y coord. of the menu origin. */
{
    register int l_orig_x;      /* Local X coordinate of the menu origin. */
    register int l_orig_y;      /* Local Y coordinate of the menu origin. */

    /*
     * Translate the menu origin such that the cursor hot point will be in the
     * center of the desired current selection and pane.
     * If the current selection pointer is NULL then assume that the hot point
     * will be in the center of the current pane flag.
     */

    if (s_ptr == NULL) {
        /*
         * Translate from the center of the pane flag to the upper left
         * of the current pane window.
         */
        l_orig_x = x_pos - (menu->p_width >> 1) - menu->p_bdr_width;
        l_orig_y = y_pos - (menu->flag_height >> 1) - menu->p_bdr_width;
    }
    else {
        /*
         * First translate from the center of the current selection
         * to the upper left of the current selection window.
         */
        l_orig_x = x_pos - (menu->s_width >> 1);
        l_orig_y = y_pos - (menu->s_height >> 1);

        /*
         * Then translate to the upper left of the current pane window.
         */
        l_orig_x -= (s_ptr->window_x + menu->p_bdr_width);
        l_orig_y -= (s_ptr->window_y + menu->p_bdr_width);
    }

    /*
     * Finally translate to the upper left of the menu.
     */
    l_orig_x -= (p_ptr->window_x - menu->x_pos);
    l_orig_y -= (p_ptr->window_y - menu->y_pos);

    /*
     * Set the return values.
     */
    *orig_x = l_orig_x;
    *orig_y = l_orig_y;
}

/*
 * _XMRefreshPane - Internal subroutine to completely refresh
 *                  the contents of a pane.
 */
void
_XMRefreshPane(register Display *display, register XMenu *menu, register XMPane *pane)
{
    register XMSelect *s_list = pane->s_list;
    register XMSelect *s_ptr;

    /*
     * First clear the pane.
     */
    XClearWindow(display, pane->window);
    if (!pane->activated) {
        XFillRectangle(display,
                       pane->window,
                       menu->inverse_select_GC,
                       pane->label_x - menu->p_fnt_pad,
                       pane->label_uy - menu->p_fnt_info->max_bounds.ascent - menu->p_fnt_pad,
                       pane->label_width + (menu->p_fnt_pad << 1),
                       menu->flag_height);

        XFillRectangle(display,
                       pane->window,
                       menu->inverse_select_GC,
                       pane->label_x - menu->p_fnt_pad,
                       pane->label_ly - menu->p_fnt_info->max_bounds.ascent - menu->p_fnt_pad,
                       pane->label_width + (menu->p_fnt_pad << 1),
                       menu->flag_height);
    }
    if (!pane->active) {
        XDrawString(display,
                    pane->window,
                    menu->inact_GC,
                    pane->label_x, pane->label_uy,
                    pane->label, pane->label_length);
        XDrawString(display,
                    pane->window,
                    menu->inact_GC,
                    pane->label_x, pane->label_ly,
                    pane->label, pane->label_length);
    }
    else {
        XDrawString(display,
                         pane->window,
                         menu->pane_GC,
                         pane->label_x, pane->label_uy,
                         pane->label, pane->label_length);
        XDrawString(display,
                         pane->window,
                         menu->pane_GC,
                         pane->label_x, pane->label_ly,
                         pane->label, pane->label_length);

        /*
         * Finally refresh each selection if the pane is activated.
         */
        if (pane->activated) {
            for (s_ptr = s_list->next; s_ptr != s_list; s_ptr = s_ptr->next)
                _XMRefreshSelection(display, menu, s_ptr);
        }
    }
}




/*
 * _XMRefreshSelection - Internal subroutine that refreshes
 *                       a single selection window.
 */
void
_XMRefreshSelection(register Display *display, register XMenu *menu, register XMSelect *sel)
{
    register int width = sel->window_w;
    register int height = sel->window_h;
    register int bdr_width = menu->s_bdr_width;

    if (sel->type == SEPARATOR) {
        XDrawLine(display,
                  sel->parent_p->window,
                  menu->normal_select_GC,
                  sel->window_x,
                  sel->window_y + height / 2,
                  sel->window_x + width,
                  sel->window_y + height / 2);
    }
    else if (sel->activated) {
        if (menu->menu_mode == INVERT) {
            XFillRectangle(display,
                           sel->parent_p->window,
                           menu->normal_select_GC,
                           sel->window_x, sel->window_y,
                           width, height);
            XDrawString(display,
                        sel->parent_p->window,
                        menu->inverse_select_GC,
                        sel->label_x,
                        sel->label_y,
                        sel->label, sel->label_length);
        }
        else {
            /*
             * Using BOX mode.
             * Since most drawing routines with arbitrary width lines
             * are slow compared to raster-ops let's use a raster-op to
             * draw the boxes.
             */

            XDrawRectangle(display,
                           sel->parent_p->window,
                           menu->normal_select_GC,
                           sel->window_x + (bdr_width >> 1),
                           sel->window_y + (bdr_width >> 1 ),
                           width - bdr_width,
                           height - bdr_width);
            XDrawString(display,
                        sel->parent_p->window,
                        menu->normal_select_GC,
                        sel->label_x,
                        sel->label_y,
                        sel->label, sel->label_length);
        }
    }
    else {
        XClearArea(display,
                   sel->parent_p->window,
                   sel->window_x, sel->window_y,
                   width, height,
                   False);
        if (sel->active) {
            XDrawString(display,
                        sel->parent_p->window,
                        menu->normal_select_GC,
                        sel->label_x,
                        sel->label_y,
                        sel->label, sel->label_length);
        }
        else {
            XDrawString(display,
                        sel->parent_p->window,
                        menu->inact_GC,
                        sel->label_x,
                        sel->label_y,
                        sel->label, sel->label_length);
        }
    }
}