541 lines
16 KiB
C
541 lines
16 KiB
C
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/****************************************************************************
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* Copyright (c) 1998 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_driver *
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* Central dispatching routine *
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***************************************************************************/
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#include "menu.priv.h"
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MODULE_ID("$Id: m_driver.c,v 1.17 1999/05/16 17:24:55 juergen Exp $")
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/* Macros */
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/* Remove the last character from the match pattern buffer */
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#define Remove_Character_From_Pattern(menu) \
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(menu)->pattern[--((menu)->pindex)] = '\0'
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/* Add a new character to the match pattern buffer */
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#define Add_Character_To_Pattern(menu,ch) \
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{ (menu)->pattern[((menu)->pindex)++] = (ch);\
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(menu)->pattern[(menu)->pindex] = '\0'; }
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/*---------------------------------------------------------------------------
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| Facility : libnmenu
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| Function : static bool Is_Sub_String(
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| bool IgnoreCaseFlag,
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| const char *part,
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| const char *string)
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| Description : Checks whether or not part is a substring of string.
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| Return Values : TRUE - if it is a substring
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| FALSE - if it is not a substring
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+--------------------------------------------------------------------------*/
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static bool Is_Sub_String(
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bool IgnoreCaseFlag,
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const char *part,
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const char *string
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)
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{
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assert( part && string );
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if ( IgnoreCaseFlag )
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{
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while(*string && *part)
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{
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if (toupper(*string++)!=toupper(*part)) break;
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part++;
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}
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}
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else
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{
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while( *string && *part )
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if (*part != *string++) break;
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part++;
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}
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return ( (*part) ? FALSE : TRUE );
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}
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/*---------------------------------------------------------------------------
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| Facility : libnmenu
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| Function : int _nc_Match_Next_Character_In_Item_Name(
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| MENU *menu,
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| int ch,
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| ITEM **item)
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| Description : This internal routine is called for a menu positioned
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| at an item with three different classes of characters:
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| - a printable character; the character is added to
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| the current pattern and the next item matching
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| this pattern is searched.
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| - NUL; the pattern stays as it is and the next item
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| matching the pattern is searched
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| - BS; the pattern stays as it is and the previous
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| item matching the pattern is searched
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| The item parameter contains on call a pointer to
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| the item where the search starts. On return - if
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| a match was found - it contains a pointer to the
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| matching item.
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| Return Values : E_OK - an item matching the pattern was found
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| E_NO_MATCH - nothing found
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+--------------------------------------------------------------------------*/
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int _nc_Match_Next_Character_In_Item_Name(MENU *menu, int ch, ITEM **item)
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{
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bool found = FALSE, passed = FALSE;
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int idx, last;
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assert( menu && item && *item);
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idx = (*item)->index;
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if (ch && ch!=BS)
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{
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/* if we become to long, we need no further checking : there can't be
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a match ! */
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if ((menu->pindex+1) > menu->namelen)
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RETURN(E_NO_MATCH);
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Add_Character_To_Pattern(menu,ch);
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/* we artificially position one item back, because in the do...while
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loop we start with the next item. This means, that with a new
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pattern search we always start the scan with the actual item. If
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we do a NEXT_PATTERN oder PREV_PATTERN search, we start with the
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one after or before the actual item. */
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if (--idx < 0)
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idx = menu->nitems-1;
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}
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last = idx; /* this closes the cycle */
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do{
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if (ch==BS)
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{ /* we have to go backward */
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if (--idx < 0)
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idx = menu->nitems-1;
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}
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else
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{ /* otherwise we always go forward */
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if (++idx >= menu->nitems)
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idx = 0;
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}
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if (Is_Sub_String((menu->opt & O_IGNORECASE) != 0,
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menu->pattern,
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menu->items[idx]->name.str)
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)
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found = TRUE;
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else
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passed = TRUE;
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} while (!found && (idx != last));
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if (found)
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{
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if (!((idx==(*item)->index) && passed))
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{
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*item = menu->items[idx];
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RETURN(E_OK);
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}
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/* This point is reached, if we fully cycled through the item list
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and the only match we found is the starting item. With a NEXT_PATTERN
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or PREV_PATTERN scan this means, that there was no additional match.
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If we searched with an expanded new pattern, we should never reach
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this point, because if the expanded pattern matches also the actual
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item we will find it in the first attempt (passed==FALSE) and we
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will never cycle through the whole item array.
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*/
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assert( ch==0 || ch==BS );
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}
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else
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{
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if (ch && ch!=BS && menu->pindex>0)
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{
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/* if we had no match with a new pattern, we have to restore it */
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Remove_Character_From_Pattern(menu);
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}
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}
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RETURN(E_NO_MATCH);
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}
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/*---------------------------------------------------------------------------
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| Facility : libnmenu
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| Function : int menu_driver(MENU *menu, int c)
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| Description : Central dispatcher for the menu. Translates the logical
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| request 'c' into a menu action.
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| Return Values : E_OK - success
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| E_BAD_ARGUMENT - invalid menu pointer
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| E_BAD_STATE - menu is in user hook routine
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| E_NOT_POSTED - menu is not posted
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+--------------------------------------------------------------------------*/
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int menu_driver(MENU * menu, int c)
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{
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#define NAVIGATE(dir) \
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if (!item->dir)\
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result = E_REQUEST_DENIED;\
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else\
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item = item->dir
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int result = E_OK;
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ITEM *item;
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int my_top_row, rdiff;
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if (!menu)
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RETURN(E_BAD_ARGUMENT);
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if ( menu->status & _IN_DRIVER )
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RETURN(E_BAD_STATE);
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if ( !( menu->status & _POSTED ) )
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RETURN(E_NOT_POSTED);
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item = menu->curitem;
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my_top_row = menu->toprow;
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assert(item);
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if ((c > KEY_MAX) && (c<=MAX_MENU_COMMAND))
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{
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if (!((c==REQ_BACK_PATTERN)
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|| (c==REQ_NEXT_MATCH) || (c==REQ_PREV_MATCH)))
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{
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assert( menu->pattern );
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Reset_Pattern(menu);
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}
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switch(c)
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{
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case REQ_LEFT_ITEM:
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/*=================*/
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NAVIGATE(left);
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break;
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case REQ_RIGHT_ITEM:
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/*==================*/
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NAVIGATE(right);
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break;
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case REQ_UP_ITEM:
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/*===============*/
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NAVIGATE(up);
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break;
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case REQ_DOWN_ITEM:
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/*=================*/
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NAVIGATE(down);
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break;
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case REQ_SCR_ULINE:
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/*=================*/
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if (my_top_row == 0 || !(item->up))
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result = E_REQUEST_DENIED;
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else
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{
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--my_top_row;
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item = item->up;
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}
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break;
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case REQ_SCR_DLINE:
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/*=================*/
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if ((my_top_row + menu->arows >= menu->rows) || !(item->down))
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{
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/* only if the menu has less items than rows, we can deny the
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request. Otherwise the epilogue of this routine adjusts the
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top row if necessary */
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result = E_REQUEST_DENIED;
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}
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else {
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my_top_row++;
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item = item->down;
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}
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break;
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case REQ_SCR_DPAGE:
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/*=================*/
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rdiff = menu->rows - (menu->arows + my_top_row);
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if (rdiff > menu->arows)
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rdiff = menu->arows;
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if (rdiff<=0)
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result = E_REQUEST_DENIED;
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else
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{
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my_top_row += rdiff;
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while(rdiff-- > 0 && item!=(ITEM*)0)
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item = item->down;
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}
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break;
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case REQ_SCR_UPAGE:
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|
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/*=================*/
|
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rdiff = (menu->arows < my_top_row) ? menu->arows : my_top_row;
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if (rdiff<=0)
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result = E_REQUEST_DENIED;
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else
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{
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my_top_row -= rdiff;
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|
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while(rdiff-- && item!=(ITEM*)0)
|
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|
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item = item->up;
|
||
|
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}
|
||
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break;
|
||
|
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|
||
|
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case REQ_FIRST_ITEM:
|
||
|
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/*==================*/
|
||
|
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item = menu->items[0];
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||
|
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break;
|
||
|
|
|
||
|
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case REQ_LAST_ITEM:
|
||
|
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/*=================*/
|
||
|
|
item = menu->items[menu->nitems-1];
|
||
|
|
break;
|
||
|
|
|
||
|
|
case REQ_NEXT_ITEM:
|
||
|
|
/*=================*/
|
||
|
|
if ((item->index+1)>=menu->nitems)
|
||
|
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{
|
||
|
|
if (menu->opt & O_NONCYCLIC)
|
||
|
|
result = E_REQUEST_DENIED;
|
||
|
|
else
|
||
|
|
item = menu->items[0];
|
||
|
|
}
|
||
|
|
else
|
||
|
|
item = menu->items[item->index + 1];
|
||
|
|
break;
|
||
|
|
|
||
|
|
case REQ_PREV_ITEM:
|
||
|
|
/*=================*/
|
||
|
|
if (item->index<=0)
|
||
|
|
{
|
||
|
|
if (menu->opt & O_NONCYCLIC)
|
||
|
|
result = E_REQUEST_DENIED;
|
||
|
|
else
|
||
|
|
item = menu->items[menu->nitems-1];
|
||
|
|
}
|
||
|
|
else
|
||
|
|
item = menu->items[item->index - 1];
|
||
|
|
break;
|
||
|
|
|
||
|
|
case REQ_TOGGLE_ITEM:
|
||
|
|
/*===================*/
|
||
|
|
if (menu->opt & O_ONEVALUE)
|
||
|
|
{
|
||
|
|
result = E_REQUEST_DENIED;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
if (menu->curitem->opt & O_SELECTABLE)
|
||
|
|
{
|
||
|
|
menu->curitem->value = !menu->curitem->value;
|
||
|
|
Move_And_Post_Item(menu,menu->curitem);
|
||
|
|
_nc_Show_Menu(menu);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
result = E_NOT_SELECTABLE;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
|
||
|
|
case REQ_CLEAR_PATTERN:
|
||
|
|
/*=====================*/
|
||
|
|
/* already cleared in prologue */
|
||
|
|
break;
|
||
|
|
|
||
|
|
case REQ_BACK_PATTERN:
|
||
|
|
/*====================*/
|
||
|
|
if (menu->pindex>0)
|
||
|
|
{
|
||
|
|
assert(menu->pattern);
|
||
|
|
Remove_Character_From_Pattern(menu);
|
||
|
|
pos_menu_cursor( menu );
|
||
|
|
}
|
||
|
|
else
|
||
|
|
result = E_REQUEST_DENIED;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case REQ_NEXT_MATCH:
|
||
|
|
/*==================*/
|
||
|
|
assert(menu->pattern);
|
||
|
|
if (menu->pattern[0])
|
||
|
|
result = _nc_Match_Next_Character_In_Item_Name(menu,0,&item);
|
||
|
|
else
|
||
|
|
{
|
||
|
|
if ((item->index+1)<menu->nitems)
|
||
|
|
item=menu->items[item->index+1];
|
||
|
|
else
|
||
|
|
{
|
||
|
|
if (menu->opt & O_NONCYCLIC)
|
||
|
|
result = E_REQUEST_DENIED;
|
||
|
|
else
|
||
|
|
item = menu->items[0];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
|
||
|
|
case REQ_PREV_MATCH:
|
||
|
|
/*==================*/
|
||
|
|
assert(menu->pattern);
|
||
|
|
if (menu->pattern[0])
|
||
|
|
result = _nc_Match_Next_Character_In_Item_Name(menu,BS,&item);
|
||
|
|
else
|
||
|
|
{
|
||
|
|
if (item->index)
|
||
|
|
item = menu->items[item->index-1];
|
||
|
|
else
|
||
|
|
{
|
||
|
|
if (menu->opt & O_NONCYCLIC)
|
||
|
|
result = E_REQUEST_DENIED;
|
||
|
|
else
|
||
|
|
item = menu->items[menu->nitems-1];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
|
||
|
|
default:
|
||
|
|
/*======*/
|
||
|
|
result = E_UNKNOWN_COMMAND;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{ /* not a command */
|
||
|
|
if ( !(c & ~((int)MAX_REGULAR_CHARACTER)) && isprint(c) )
|
||
|
|
result = _nc_Match_Next_Character_In_Item_Name( menu, c, &item );
|
||
|
|
#ifdef NCURSES_MOUSE_VERSION
|
||
|
|
else if (KEY_MOUSE == c)
|
||
|
|
{
|
||
|
|
MEVENT event;
|
||
|
|
WINDOW* uwin = Get_Menu_UserWin(menu);
|
||
|
|
|
||
|
|
getmouse(&event);
|
||
|
|
if ((event.bstate & (BUTTON1_CLICKED |
|
||
|
|
BUTTON1_DOUBLE_CLICKED |
|
||
|
|
BUTTON1_TRIPLE_CLICKED ))
|
||
|
|
&& wenclose(uwin,event.y, event.x))
|
||
|
|
{ /* we react only if the click was in the userwin, that means
|
||
|
|
* inside the menu display area or at the decoration window.
|
||
|
|
*/
|
||
|
|
WINDOW* sub = Get_Menu_Window(menu);
|
||
|
|
int ry = event.y, rx = event.x; /* screen coordinates */
|
||
|
|
|
||
|
|
result = E_REQUEST_DENIED;
|
||
|
|
if (mouse_trafo(&ry,&rx,FALSE))
|
||
|
|
{ /* rx, ry are now "curses" coordinates */
|
||
|
|
if (ry < sub->_begy)
|
||
|
|
{ /* we clicked above the display region; this is
|
||
|
|
* interpreted as "scroll up" request
|
||
|
|
*/
|
||
|
|
if (event.bstate & BUTTON1_CLICKED)
|
||
|
|
result = menu_driver(menu,REQ_SCR_ULINE);
|
||
|
|
else if (event.bstate & BUTTON1_DOUBLE_CLICKED)
|
||
|
|
result = menu_driver(menu,REQ_SCR_UPAGE);
|
||
|
|
else if (event.bstate & BUTTON1_TRIPLE_CLICKED)
|
||
|
|
result = menu_driver(menu,REQ_FIRST_ITEM);
|
||
|
|
RETURN(result);
|
||
|
|
}
|
||
|
|
else if (ry >= sub->_begy + sub->_maxy)
|
||
|
|
{ /* we clicked below the display region; this is
|
||
|
|
* interpreted as "scroll down" request
|
||
|
|
*/
|
||
|
|
if (event.bstate & BUTTON1_CLICKED)
|
||
|
|
result = menu_driver(menu,REQ_SCR_DLINE);
|
||
|
|
else if (event.bstate & BUTTON1_DOUBLE_CLICKED)
|
||
|
|
result = menu_driver(menu,REQ_SCR_DPAGE);
|
||
|
|
else if (event.bstate & BUTTON1_TRIPLE_CLICKED)
|
||
|
|
result = menu_driver(menu,REQ_LAST_ITEM);
|
||
|
|
RETURN(result);
|
||
|
|
}
|
||
|
|
else if (wenclose(sub,event.y,event.x))
|
||
|
|
{ /* Inside the area we try to find the hit item */
|
||
|
|
int i,x,y,err;
|
||
|
|
ry = event.y; rx = event.x;
|
||
|
|
if (wmouse_trafo(sub,&ry,&rx,FALSE))
|
||
|
|
{
|
||
|
|
for(i=0;i<menu->nitems;i++)
|
||
|
|
{
|
||
|
|
err = _nc_menu_cursor_pos(menu,menu->items[i],
|
||
|
|
&y, &x);
|
||
|
|
if (E_OK==err)
|
||
|
|
{
|
||
|
|
if ((ry==y) &&
|
||
|
|
(rx>=x) &&
|
||
|
|
(rx < x + menu->itemlen))
|
||
|
|
{
|
||
|
|
item = menu->items[i];
|
||
|
|
result = E_OK;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (E_OK==result)
|
||
|
|
{ /* We found an item, now we can handle the click.
|
||
|
|
* A single click just positions the menu cursor
|
||
|
|
* to the clicked item. A double click toggles
|
||
|
|
* the item.
|
||
|
|
*/
|
||
|
|
if (event.bstate & BUTTON1_DOUBLE_CLICKED)
|
||
|
|
{
|
||
|
|
_nc_New_TopRow_and_CurrentItem(menu,
|
||
|
|
my_top_row,
|
||
|
|
item);
|
||
|
|
menu_driver(menu,REQ_TOGGLE_ITEM);
|
||
|
|
result = E_UNKNOWN_COMMAND;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else
|
||
|
|
result = E_REQUEST_DENIED;
|
||
|
|
}
|
||
|
|
#endif /* NCURSES_MOUSE_VERSION */
|
||
|
|
else
|
||
|
|
result = E_UNKNOWN_COMMAND;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (E_OK==result)
|
||
|
|
{
|
||
|
|
/* Adjust the top row if it turns out that the current item unfortunately
|
||
|
|
doesn't appear in the menu window */
|
||
|
|
if ( item->y < my_top_row )
|
||
|
|
my_top_row = item->y;
|
||
|
|
else if ( item->y >= (my_top_row + menu->arows) )
|
||
|
|
my_top_row = item->y - menu->arows + 1;
|
||
|
|
|
||
|
|
_nc_New_TopRow_and_CurrentItem( menu, my_top_row, item );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
RETURN(result);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* m_driver.c ends here */
|