internal.c

早期freebsd实现

#include <X11/copyright.h>

/* $Header: Internal.c,v 1.12 87/12/20 12:05:22 rws Exp $ */
/* Copyright    Massachusetts Institute of Technology    1985	*/

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

#include "XMenuInt.h"

/*
 * Toggle color macro.
 */
#define toggle_color(x) \
	((x) == menu->bkgnd_color ? menu->s_frg_color : menu->bkgnd_color)

/*
 * Internal Window creation queue sizes.
 */
#define S_QUE_SIZE	300
#define P_QUE_SIZE	20
#define BUFFER_SIZE	(S_QUE_SIZE >= P_QUE_SIZE ? S_QUE_SIZE : P_QUE_SIZE)


/*
 * 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 discription strings.
 */
char *
_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)() = NULL;



/*
 * _XMWinQueInit - Internal routine to initialize the window
 *		   queue.
 */
_XMWinQueInit()
{
    /*
     * If the queue is not initialized initialize it.
     */
    if (!_XMWinQueIsInit) {
	/*
	 * Blank the queue structure.
	 */
	bzero(&_XMWinQue, sizeof(XMWinQue));

	/*
	 * 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(display, menu, p_ptr)
    register Display *display;
    register XMenu *menu;	/* Menu being manipulated. */
    register XMPane *p_ptr;	/* 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(display, menu, s_ptr)
    register Display *display;
    register XMenu *menu;	/* Menu being manipulated. */
    register XMSelect *s_ptr;	/* 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(display, menu, pane, select)
    register Display *display;
    register XMenu *menu;		/* Menu being manipulated. */
    register XMPane *pane;		/* 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; 	/* Attributes to be set. */

    /*
     * 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 = (XSetWindowAttributes *)malloc(sizeof(XSetWindowAttributes));
	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 
	     * assoction 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(menu, p_num)
    register XMenu *menu;	/* Menu to find the pane in. */
    register int p_num;		/* 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(p_ptr, s_num)
    register XMPane *p_ptr;	/* Pane to find the selection in. */
    register int s_num;		/* 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.
 */
_XMRecomputeGlobals(display, menu)
    register Display *display; /*X11 display variable. */	
    register XMenu *menu;	/* 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 seperation. */

    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;