/* $TOG: disp.c /main/6 1997/06/18 17:34:28 samborn $ */

/*

 * Motif

 *

 * Copyright (c) 1987-2012, The Open Group. All rights reserved.

 *

 * These libraries and programs are free software; you can

 * redistribute them and/or modify them under the terms of the GNU

 * Lesser General Public License as published by the Free Software

 * Foundation; either version 2 of the License, or (at your option)

 * any later version.

 *

 * These libraries and programs are distributed in the hope that

 * they will be useful, but WITHOUT ANY WARRANTY; without even the

 * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR

 * PURPOSE. See the GNU Lesser General Public License for more

 * details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with these librararies and programs; if not, write

 * to the Free Software Foundation, Inc., 51 Franklin Street, Fifth

 * Floor, Boston, MA 02110-1301 USA

 * 

 */

/*

 * HISTORY

 */

#include "wsm_proto.h"

WSMDispInfo * GDispInfo = NULL;

/*	Function Name: _WSMGetDispInfo

 *	Description: Gets the display information structure associated with

 *                   the display passed into this function.

 *	Arguments: dpy - The Display to get the info for.

 *	Returns: a WSMDispInfo structure for the display passed.

 */

WSMDispInfo *

_WSMGetDispInfo(Display *dpy)

{

    enum { XA_WSM_NAME_CONNECT, XA_WSM_NAME_EXTENSIONS, XA_WSM_NAME_CONFIG_FMT,

	   XA_WSM_NAME_GET_STATE, XA_WSM_NAME_SET_STATE, XA_WSM_NAME_REG_WINDOW,

	   XA_WSM_NAME_WM_GET_BACKGROUND_WINDOW,

	   XA_WSM_NAME_WM_SET_BACKGROUND_WINDOW, XA_WSM_NAME_WM_WINDOWS,

	   XA_WSM_NAME_WM_FOCUS, XA_WSM_NAME_WM_POINTER, XA_TARGETS,

	   XA_MULTIPLE, XA_TIMESTAMP, NUM_ATOMS };

    static char *atom_names[] = {

           WSM_NAME_CONNECT, WSM_NAME_EXTENSIONS, WSM_NAME_CONFIG_FMT,

	   WSM_NAME_GET_STATE, WSM_NAME_SET_STATE, WSM_NAME_REG_WINDOW,

	   WSM_NAME_WM_GET_BACKGROUND_WINDOW,

	   WSM_NAME_WM_SET_BACKGROUND_WINDOW, WSM_NAME_WM_WINDOWS,

	   WSM_NAME_WM_FOCUS, WSM_NAME_WM_POINTER, "TARGETS",

	   "MULTIPLE", "TIMESTAMP" };

    WSMDispInfo * disp_info;

    Atom atoms[XtNumber(atom_names)];

    if (GDispInfo == NULL) {

	disp_info = GDispInfo = (WSMDispInfo *) XtMalloc(sizeof(WSMDispInfo));

    }

    else {

	disp_info = GDispInfo;

	 while (True) {

	    if (disp_info->disp == dpy)

		return(disp_info);

	    if (disp_info->next == NULL)

		break;

	    disp_info = disp_info->next;

	}

	/*

	 * This display is not on the global list, add it.

	 */

	disp_info->next = (WSMDispInfo *) XtMalloc(sizeof(WSMDispInfo));

	disp_info = disp_info->next;

    }

    disp_info->disp = dpy;

    /*

     * These are our names.

     * 

     * ||| Should use XtConvertAndStore().

     */

    XInternAtoms(dpy, atom_names, XtNumber(atom_names), False, atoms);

    disp_info->connect = atoms[XA_WSM_NAME_CONNECT];

    disp_info->extensions = atoms[XA_WSM_NAME_EXTENSIONS];

    disp_info->config_fmt = atoms[XA_WSM_NAME_CONFIG_FMT];

    disp_info->get_state = atoms[XA_WSM_NAME_GET_STATE];

    disp_info->set_state = atoms[XA_WSM_NAME_SET_STATE];

    disp_info->reg_window = atoms[XA_WSM_NAME_REG_WINDOW];

    disp_info->get_background = atoms[XA_WSM_NAME_WM_GET_BACKGROUND_WINDOW];

    disp_info->set_background = atoms[XA_WSM_NAME_WM_SET_BACKGROUND_WINDOW];

    disp_info->wm_windows = atoms[XA_WSM_NAME_WM_WINDOWS];

    disp_info->wm_focus   = atoms[XA_WSM_NAME_WM_FOCUS];

    disp_info->wm_pointer = atoms[XA_WSM_NAME_WM_POINTER];

    /*

     * These global resources are unlikely to change.

     */

    disp_info->targets = atoms[XA_TARGETS];

    disp_info->multiple = atoms[XA_MULTIPLE];

    disp_info->timestamp = atoms[XA_TIMESTAMP];

    disp_info->screen_info = NULL;

    disp_info->next = NULL;

    return(disp_info);

}

/*	Function Name: _WSMGetScreenInfo

 *	Description: Gets the screen information structure associated with

 *                   the display and screen passed into this function.

 *	Arguments: dpy - The Display to get the info for.

 *                 screen_number - The screen number.

 *	Returns: a WSMScreenInfo structure for the display passed.

 */

WSMScreenInfo *

_WSMGetScreenInfo(Display *dpy, int screen_number)

{

    WSMDispInfo * disp_info = _WSMGetDispInfo(dpy);

    WSMScreenInfo *screen_info;

    char temp[BUFSIZ];

    if (disp_info->screen_info == NULL) {

	/*

	 * Didn't find any screen info on this display, allocate it

	 * and then drop down to the code below that fills in the data.

	 */

	screen_info = (WSMScreenInfo *) XtMalloc(sizeof(WSMScreenInfo));

	disp_info->screen_info = screen_info;

    }

    else {

	screen_info = disp_info->screen_info;

	/*

	 * Hunt through the screen info structs on this display until we

	 * find one that matches the screen num passed.  If we don't find

	 * one then allocate a new one, put it on the end of the list and

	 * drop into the code below that fills in the data.

	 */

	while (True) {

	    if (screen_info->screen_num == screen_number)

		return(screen_info);

	    if (screen_info->next == NULL)

		break;

	    screen_info = screen_info->next;

	}

	/*

	 * This screen is not on the display's screen list, add it.

	 */

	screen_info->next = (WSMScreenInfo *) XtMalloc(sizeof(WSMScreenInfo));

	screen_info = screen_info->next;

    }

    screen_info->screen_num = screen_number;

    sprintf(temp, WM_SELECTION_FORMAT, screen_number);

    screen_info->wm_selection = XInternAtom(dpy, temp, False);

    sprintf(temp, WSM_SELECTION_FORMAT, screen_number);

    screen_info->wsm_selection = XInternAtom(dpy, temp, False);

    screen_info->next = NULL;

    screen_info->global.num_attrs = 0;

    screen_info->window.num_attrs = 0;

    screen_info->icon.num_attrs = 0;

    screen_info->request_callback = NULL;

    screen_info->request_data = NULL;

    return(screen_info);

}

/*	Function Name: _WSMClearConfigScreenInfo

 *	Description: Resets the screen information structure associated with

 *                   the display and screen passed into this function.

 *	Arguments: dpy - The Display to get the info for.

 *                 screen_number - The screen number.

 *	Returns:

 */

void

_WSMClearConfigScreenInfo(Display *dpy, int screen_number)

{

    WSMDispInfo * disp_info = _WSMGetDispInfo(dpy);

    WSMScreenInfo *screen_info;

    if (disp_info->screen_info != NULL)

      {

	screen_info = disp_info->screen_info;

	/*

	 * Hunt through the screen info structs on this display until we

	 * find one that matches the screen num passed. 

	 */

	while (True) {

	  if (screen_info->screen_num == screen_number)

	    break;

	  if (screen_info->next == NULL)

	    return;

	  screen_info = screen_info->next;

	}

	if (screen_info->global.num_attrs != 0){

	  XtFree((XtPointer)screen_info->global.attr_list);

	  screen_info->global.num_attrs = 0;

	}

	if (screen_info->window.num_attrs != 0){

	  XtFree((XtPointer)screen_info->window.attr_list);

	  screen_info->window.num_attrs = 0;

	}

	if (screen_info->icon.num_attrs != 0){

	  XtFree((XtPointer)screen_info->icon.attr_list);

	  screen_info->icon.num_attrs = 0;

	}

      }

}

/*	Function Name: _WSMGetConfigFormat

 *	Description: Gets the Configuration format for the dpy, scr and

 *                   type specified.

 *	Arguments: dpy - The display.

 *                 screen_number - The screen number.

 *                 type - The type of format required.

 *	Returns: A pointer to the config format, or NULL if none was

 *               found.

 */

WSMConfigFormatData *

_WSMGetConfigFormat(Display *dpy, int screen_number, WSMConfigFormatType type)

{

    WSMScreenInfo *screen_info = _WSMGetScreenInfo(dpy, screen_number);

    if (screen_info == NULL)

	return(NULL);

    switch(type) {

    case WSM_GLOBAL_FMT:

	return(&(screen_info->global));

    case WSM_WINDOW_FMT:

	return(&(screen_info->window));

    case WSM_ICON_FMT:

	return(&(screen_info->icon));

    default:

	break;

    }

    return(NULL);

}

/*	Function Name: _WSMGetSelectionAtom

 *	Description: Gets the Selection atom for the manager that we want to

 *                   send to.

 *	Arguments: dpy - The display.

 *                 screen_number - The screen number.

 *                 send_to - Whether to send this to the WM or WSM.

 *	Returns: A pointer to the config format, or NULL if none was

 *               found.

 */

Atom

_WSMGetSelectionAtom(Display *dpy, int screen_num, WSMClientType send_to)

{

    WSMScreenInfo *screen_info = _WSMGetScreenInfo(dpy, screen_num);

    if (screen_info == NULL)

	return(None);

    switch(send_to) {

    case WSM_WORKSPACE_MANAGER:

	return(screen_info->wsm_selection);

    case WSM_WINDOW_MANAGER:

	return(screen_info->wm_selection);

    default:

	break;

    }

    return(None);

}