490 lines
16 KiB
C
490 lines
16 KiB
C
/****************************************************************************
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* Copyright (c) 1998,2000 Free Software Foundation, Inc. *
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* *
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* Permission is hereby granted, free of charge, to any person obtaining a *
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* copy of this software and associated documentation files (the *
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* "Software"), to deal in the Software without restriction, including *
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* without limitation the rights to use, copy, modify, merge, publish, *
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* distribute, distribute with modifications, sublicense, and/or sell *
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* copies of the Software, and to permit persons to whom the Software is *
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* furnished to do so, subject to the following conditions: *
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* *
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* The above copyright notice and this permission notice shall be included *
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* in all copies or substantial portions of the Software. *
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* *
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
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* IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
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* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
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* THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
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* *
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* Except as contained in this notice, the name(s) of the above copyright *
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* holders shall not be used in advertising or otherwise to promote the *
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* sale, use or other dealings in this Software without prior written *
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* authorization. *
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****************************************************************************/
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/****************************************************************************
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* Author: Juergen Pfeifer <juergen.pfeifer@gmx.net> 1995,1997 *
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****************************************************************************/
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/***************************************************************************
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* Module m_global *
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* Globally used internal routines and the default menu and item structures *
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***************************************************************************/
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#include "menu.priv.h"
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MODULE_ID("$Id: m_global.c,v 1.12 2000/12/10 02:16:48 tom Exp $")
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NCURSES_EXPORT_VAR(MENU) _nc_Default_Menu = {
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16, /* Nr. of chars high */
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1, /* Nr. of chars wide */
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16, /* Nr. of items high */
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1, /* Nr. of items wide */
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16, /* Nr. of formatted items high */
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1, /* Nr. of formatted items wide */
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16, /* Nr. of items high (actual) */
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0, /* length of widest name */
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0, /* length of widest description */
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1, /* length of mark */
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1, /* length of one item */
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1, /* Spacing for descriptor */
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1, /* Spacing for columns */
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1, /* Spacing for rows */
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(char *)0, /* buffer used to store match chars */
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0, /* Index into pattern buffer */
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(WINDOW *)0, /* Window containing entire menu */
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(WINDOW *)0, /* Portion of menu displayed */
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(WINDOW *)0, /* User's window */
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(WINDOW *)0, /* User's subwindow */
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(ITEM **)0, /* List of items */
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0, /* Total Nr. of items in menu */
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(ITEM *)0, /* Current item */
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0, /* Top row of menu */
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(chtype)A_REVERSE, /* Attribute for selection */
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(chtype)A_NORMAL, /* Attribute for nonselection */
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(chtype)A_UNDERLINE, /* Attribute for inactive */
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' ', /* Pad character */
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(Menu_Hook)0, /* Menu init */
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(Menu_Hook)0, /* Menu term */
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(Menu_Hook)0, /* Item init */
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(Menu_Hook)0, /* Item term */
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(void *)0, /* userptr */
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"-", /* mark */
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ALL_MENU_OPTS, /* options */
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0 /* status */
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};
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NCURSES_EXPORT_VAR(ITEM) _nc_Default_Item = {
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{ (char *)0, 0 }, /* name */
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{ (char *)0, 0 }, /* description */
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(MENU *)0, /* Pointer to parent menu */
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(char *)0, /* Userpointer */
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ALL_ITEM_OPTS, /* options */
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0, /* Item Nr. */
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0, /* y */
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0, /* x */
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FALSE, /* value */
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(ITEM *)0, /* left */
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(ITEM *)0, /* right */
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(ITEM *)0, /* up */
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(ITEM *)0 /* down */
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};
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/*---------------------------------------------------------------------------
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| Facility : libnmenu
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| Function : static void ComputeMaximum_NameDesc_Lenths(MENU *menu)
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| Description : Calculates the maximum name and description lengths
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| of the items connected to the menu
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| Return Values : -
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+--------------------------------------------------------------------------*/
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INLINE static void ComputeMaximum_NameDesc_Lengths(MENU * menu)
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{
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unsigned MaximumNameLength = 0;
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unsigned MaximumDescriptionLength = 0;
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ITEM **items;
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assert(menu && menu->items);
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for( items = menu->items; *items ; items++ )
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{
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if (items[0]->name.length > MaximumNameLength )
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MaximumNameLength = items[0]->name.length;
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if (items[0]->description.length > MaximumDescriptionLength)
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MaximumDescriptionLength = items[0]->description.length;
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}
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menu->namelen = MaximumNameLength;
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menu->desclen = MaximumDescriptionLength;
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}
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/*---------------------------------------------------------------------------
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| Facility : libnmenu
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| Function : static void ResetConnectionInfo(MENU *, ITEM **)
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| Description : Reset all informations in the menu and the items in
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| the item array that indicates a connection
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| Return Values : -
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+--------------------------------------------------------------------------*/
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INLINE static void ResetConnectionInfo(MENU *menu, ITEM **items)
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{
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ITEM **item;
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assert(menu && items);
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for(item=items; *item; item++)
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{
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(*item)->index = 0;
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(*item)->imenu = (MENU *)0;
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}
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if (menu->pattern)
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free(menu->pattern);
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menu->pattern = (char *)0;
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menu->pindex = 0;
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menu->items = (ITEM **)0;
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menu->nitems = 0;
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}
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/*---------------------------------------------------------------------------
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| Facility : libnmenu
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| Function : bool _nc_Connect_Items(MENU *menu, ITEM **items)
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| Description : Connect the items in the item array to the menu.
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| Decorate all the items with a number and a backward
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| pointer to the menu.
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| Return Values : TRUE - successfull connection
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| FALSE - connection failed
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+--------------------------------------------------------------------------*/
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NCURSES_EXPORT(bool)
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_nc_Connect_Items (MENU *menu, ITEM **items)
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{
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ITEM **item;
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unsigned int ItemCount = 0;
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if ( menu && items )
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{
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for(item=items; *item ; item++)
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{
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if ( (*item)->imenu )
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{
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/* if a item is already connected, reject connection */
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break;
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}
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}
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if (! (*item) )
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/* we reached the end, so there was no connected item */
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{
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for(item=items; *item ; item++)
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{
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if (menu->opt & O_ONEVALUE)
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{
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(*item)->value = FALSE;
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}
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(*item)->index = ItemCount++;
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(*item)->imenu = menu;
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}
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}
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}
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else
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return(FALSE);
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if (ItemCount != 0)
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{
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menu->items = items;
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menu->nitems = ItemCount;
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ComputeMaximum_NameDesc_Lengths(menu);
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if ( (menu->pattern = (char *)malloc( (unsigned)(1 + menu->namelen))) )
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{
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Reset_Pattern(menu);
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set_menu_format(menu,menu->frows,menu->fcols);
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menu->curitem = *items;
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menu->toprow = 0;
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return(TRUE);
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}
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}
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/* If we fall through to this point, we have to reset all items connection
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and inform about a reject connection */
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ResetConnectionInfo( menu, items );
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return(FALSE);
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}
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/*---------------------------------------------------------------------------
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| Facility : libnmenu
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| Function : void _nc_Disconnect_Items(MENU *menu)
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| Description : Disconnect the menus item array from the menu
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| Return Values : -
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+--------------------------------------------------------------------------*/
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NCURSES_EXPORT(void)
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_nc_Disconnect_Items (MENU * menu)
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{
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if (menu && menu->items)
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ResetConnectionInfo( menu, menu->items );
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}
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/*---------------------------------------------------------------------------
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| Facility : libnmenu
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| Function : void _nc_Calculate_Item_Length_and_Width(MENU *menu)
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| Description : Calculate the length of an item and the width of the
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| whole menu.
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| Return Values : -
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+--------------------------------------------------------------------------*/
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NCURSES_EXPORT(void)
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_nc_Calculate_Item_Length_and_Width (MENU * menu)
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{
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int l;
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assert(menu);
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menu->height = 1 + menu->spc_rows * (menu->arows - 1);
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l = menu->namelen + menu->marklen;
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if ( (menu->opt & O_SHOWDESC) && (menu->desclen > 0) )
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l += (menu->desclen + menu->spc_desc);
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menu->itemlen = l;
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l *= menu->cols;
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l += (menu->cols-1)*menu->spc_cols; /* for the padding between the columns */
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menu->width = l;
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}
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/*---------------------------------------------------------------------------
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| Facility : libnmenu
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| Function : void _nc_Link_Item(MENU *menu)
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| Description : Statically calculate for every item its four neighbours.
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| This depends on the orientation of the menu. This
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| static aproach simplifies navigation in the menu a lot.
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| Return Values : -
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+--------------------------------------------------------------------------*/
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NCURSES_EXPORT(void)
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_nc_Link_Items (MENU * menu)
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{
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if (menu && menu->items && *(menu->items))
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{
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int i,j;
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ITEM *item;
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int Number_Of_Items = menu->nitems;
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int col = 0, row = 0;
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int Last_in_Row;
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int Last_in_Column;
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bool cycle = (menu->opt & O_NONCYCLIC) ? FALSE : TRUE;
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menu->status &= ~_LINK_NEEDED;
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if (menu->opt & O_ROWMAJOR)
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{
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int Number_Of_Columns = menu->cols;
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for(i=0; i < Number_Of_Items; i++)
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{
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item = menu->items[i];
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Last_in_Row = row * Number_Of_Columns + (Number_Of_Columns-1);
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item->left = (col) ?
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/* if we are not in the leftmost column, we can use the
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predecessor in the items array */
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menu->items[i-1] :
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(cycle ? menu->items[(Last_in_Row>=Number_Of_Items) ?
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Number_Of_Items-1:
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Last_in_Row] :
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(ITEM *)0 );
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item->right = ( (col < (Number_Of_Columns-1)) &&
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((i+1) < Number_Of_Items)
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) ?
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menu->items[i+1] :
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( cycle ? menu->items[row * Number_Of_Columns] :
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(ITEM *)0
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);
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Last_in_Column = (menu->rows-1) * Number_Of_Columns + col;
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item->up = (row) ? menu->items[i-Number_Of_Columns] :
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(cycle ? menu->items[(Last_in_Column>=Number_Of_Items) ?
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Number_Of_Items-1 :
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Last_in_Column] :
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(ITEM *)0);
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item->down = ( (i+Number_Of_Columns) < Number_Of_Items )
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?
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menu->items[i + Number_Of_Columns] :
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(cycle ? menu->items[(row+1)<menu->rows ?
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Number_Of_Items-1:col] :
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(ITEM *)0);
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item->x = col;
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item->y = row;
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if ( ++col == Number_Of_Columns )
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{
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row++;
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col = 0;
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}
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}
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}
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else
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{
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int Number_Of_Rows = menu->rows;
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for(j=0; j<Number_Of_Items; j++)
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{
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item = menu->items[i=(col * Number_Of_Rows + row)];
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Last_in_Column = (menu->cols-1) * Number_Of_Rows + row;
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item->left = (col) ?
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menu->items[i - Number_Of_Rows] :
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(cycle ? (Last_in_Column >= Number_Of_Items ) ?
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menu->items[Last_in_Column-Number_Of_Rows] :
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menu->items[Last_in_Column] :
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(ITEM *)0 );
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item->right = ((i + Number_Of_Rows) <Number_Of_Items)
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?
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menu->items[i + Number_Of_Rows] :
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(cycle ? menu->items[row] : (ITEM *)0);
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Last_in_Row = col * Number_Of_Rows + (Number_Of_Rows - 1);
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item->up = (row) ?
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menu->items[i-1] :
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(cycle ?
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menu->items[(Last_in_Row>=Number_Of_Items) ?
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Number_Of_Items-1:
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Last_in_Row] :
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(ITEM *)0);
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item->down = (row < (Number_Of_Rows-1))
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?
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(menu->items[((i+1)<Number_Of_Items) ?
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i+1 :
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(col-1)*Number_Of_Rows + row + 1]) :
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(cycle ?
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menu->items[col * Number_Of_Rows] :
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(ITEM *)0
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);
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item->x = col;
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item->y = row;
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if ( (++row) == Number_Of_Rows )
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{
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col++;
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row = 0;
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}
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}
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}
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}
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}
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/*---------------------------------------------------------------------------
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| Facility : libnmenu
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| Function : void _nc_Show_Menu(const MENU *menu)
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| Description : Update the window that is associated with the menu
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| Return Values : -
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+--------------------------------------------------------------------------*/
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NCURSES_EXPORT(void)
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_nc_Show_Menu (const MENU *menu)
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{
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WINDOW *win;
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int maxy, maxx;
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assert(menu);
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if ( (menu->status & _POSTED) && !(menu->status & _IN_DRIVER) )
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{
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/* adjust the internal subwindow to start on the current top */
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assert(menu->sub);
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mvderwin(menu->sub,menu->spc_rows * menu->toprow,0);
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win = Get_Menu_Window(menu);
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maxy = getmaxy(win);
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maxx = getmaxx(win);
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if (menu->height < maxy)
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maxy = menu->height;
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if (menu->width < maxx)
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maxx = menu->width;
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copywin(menu->sub,win,0,0,0,0,maxy-1,maxx-1,0);
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pos_menu_cursor(menu);
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}
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}
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/*---------------------------------------------------------------------------
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| Facility : libnmenu
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| Function : void _nc_New_TopRow_and_CurrentItem(
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| MENU *menu,
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| int new_toprow,
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| ITEM *new_current_item)
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| Description : Redisplay the menu so that the given row becomes the
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| top row and the given item becomes the new current
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| item.
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| Return Values : -
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+--------------------------------------------------------------------------*/
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NCURSES_EXPORT(void)
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_nc_New_TopRow_and_CurrentItem
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(MENU *menu, int new_toprow, ITEM *new_current_item)
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{
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ITEM *cur_item;
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bool mterm_called = FALSE;
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bool iterm_called = FALSE;
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assert(menu);
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if (menu->status & _POSTED)
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{
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if (new_current_item != menu->curitem)
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{
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Call_Hook(menu,itemterm);
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iterm_called = TRUE;
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}
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if (new_toprow != menu->toprow)
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{
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Call_Hook(menu,menuterm);
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mterm_called = TRUE;
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}
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cur_item = menu->curitem;
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assert(cur_item);
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menu->toprow = new_toprow;
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menu->curitem = new_current_item;
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if (mterm_called)
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{
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Call_Hook(menu,menuinit);
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}
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if (iterm_called)
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{
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/* this means, move from the old current_item to the new one... */
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Move_To_Current_Item( menu, cur_item );
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Call_Hook(menu,iteminit);
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}
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if (mterm_called || iterm_called)
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{
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_nc_Show_Menu(menu);
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}
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else
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pos_menu_cursor(menu);
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}
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else
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{ /* if we are not posted, this is quite simple */
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menu->toprow = new_toprow;
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menu->curitem = new_current_item;
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}
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}
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/* m_global.c ends here */
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