556 lines
16 KiB
C
556 lines
16 KiB
C
/****************************************************************************
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* Copyright (c) 1998-2004,2005 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, 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 1.25 2005/11/26 20:46:59 tom 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
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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))
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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++)
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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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NCURSES_EXPORT(int)
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_nc_Match_Next_Character_In_Item_Name
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(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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T((T_CALLED("_nc_Match_Next_Character(%p,%d,%p)"), menu, ch, item));
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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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{
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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((bool)((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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}
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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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NCURSES_EXPORT(int)
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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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T((T_CALLED("menu_driver(%p,%d)"), menu, c));
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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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{
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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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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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while (rdiff-- && item != (ITEM *) 0)
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item = item->up;
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}
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break;
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case REQ_FIRST_ITEM:
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/*==================*/
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item = menu->items[0];
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break;
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case REQ_LAST_ITEM:
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/*=================*/
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item = menu->items[menu->nitems - 1];
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break;
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case REQ_NEXT_ITEM:
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/*=================*/
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if ((item->index + 1) >= menu->nitems)
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{
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if (menu->opt & O_NONCYCLIC)
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result = E_REQUEST_DENIED;
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else
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item = menu->items[0];
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}
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else
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item = menu->items[item->index + 1];
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break;
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case REQ_PREV_ITEM:
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/*=================*/
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if (item->index <= 0)
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{
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if (menu->opt & O_NONCYCLIC)
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result = E_REQUEST_DENIED;
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else
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item = menu->items[menu->nitems - 1];
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}
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else
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item = menu->items[item->index - 1];
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break;
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case REQ_TOGGLE_ITEM:
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/*===================*/
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if (menu->opt & O_ONEVALUE)
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{
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result = E_REQUEST_DENIED;
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}
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else
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{
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if (menu->curitem->opt & O_SELECTABLE)
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{
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menu->curitem->value = !menu->curitem->value;
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Move_And_Post_Item(menu, menu->curitem);
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_nc_Show_Menu(menu);
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}
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else
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result = E_NOT_SELECTABLE;
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}
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break;
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case REQ_CLEAR_PATTERN:
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/*=====================*/
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/* already cleared in prologue */
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break;
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case REQ_BACK_PATTERN:
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/*====================*/
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if (menu->pindex > 0)
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{
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assert(menu->pattern);
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Remove_Character_From_Pattern(menu);
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pos_menu_cursor(menu);
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}
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else
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result = E_REQUEST_DENIED;
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break;
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case REQ_NEXT_MATCH:
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/*==================*/
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assert(menu->pattern);
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if (menu->pattern[0])
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result = _nc_Match_Next_Character_In_Item_Name(menu, 0, &item);
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else
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{
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if ((item->index + 1) < menu->nitems)
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item = menu->items[item->index + 1];
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else
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{
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if (menu->opt & O_NONCYCLIC)
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result = E_REQUEST_DENIED;
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else
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item = menu->items[0];
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}
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}
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break;
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case REQ_PREV_MATCH:
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/*==================*/
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assert(menu->pattern);
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if (menu->pattern[0])
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result = _nc_Match_Next_Character_In_Item_Name(menu, BS, &item);
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else
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{
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if (item->index)
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item = menu->items[item->index - 1];
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else
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{
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if (menu->opt & O_NONCYCLIC)
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result = E_REQUEST_DENIED;
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else
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item = menu->items[menu->nitems - 1];
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}
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}
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break;
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default:
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/*======*/
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result = E_UNKNOWN_COMMAND;
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break;
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}
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}
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else
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{ /* not a command */
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if (!(c & ~((int)MAX_REGULAR_CHARACTER)) && isprint(UChar(c)))
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result = _nc_Match_Next_Character_In_Item_Name(menu, c, &item);
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#ifdef NCURSES_MOUSE_VERSION
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else if (KEY_MOUSE == c)
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{
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MEVENT event;
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WINDOW *uwin = Get_Menu_UserWin(menu);
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getmouse(&event);
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if ((event.bstate & (BUTTON1_CLICKED |
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BUTTON1_DOUBLE_CLICKED |
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BUTTON1_TRIPLE_CLICKED))
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&& wenclose(uwin, event.y, event.x))
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{ /* we react only if the click was in the userwin, that means
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* inside the menu display area or at the decoration window.
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*/
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WINDOW *sub = Get_Menu_Window(menu);
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int ry = event.y, rx = event.x; /* screen coordinates */
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result = E_REQUEST_DENIED;
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if (mouse_trafo(&ry, &rx, FALSE))
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{ /* rx, ry are now "curses" coordinates */
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if (ry < sub->_begy)
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{ /* we clicked above the display region; this is
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* interpreted as "scroll up" request
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*/
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if (event.bstate & BUTTON1_CLICKED)
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result = menu_driver(menu, REQ_SCR_ULINE);
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else if (event.bstate & BUTTON1_DOUBLE_CLICKED)
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result = menu_driver(menu, REQ_SCR_UPAGE);
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else if (event.bstate & BUTTON1_TRIPLE_CLICKED)
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result = menu_driver(menu, REQ_FIRST_ITEM);
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RETURN(result);
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}
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else if (ry > sub->_begy + sub->_maxy)
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{ /* we clicked below the display region; this is
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* interpreted as "scroll down" request
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*/
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if (event.bstate & BUTTON1_CLICKED)
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result = menu_driver(menu, REQ_SCR_DLINE);
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else if (event.bstate & BUTTON1_DOUBLE_CLICKED)
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result = menu_driver(menu, REQ_SCR_DPAGE);
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else if (event.bstate & BUTTON1_TRIPLE_CLICKED)
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result = menu_driver(menu, REQ_LAST_ITEM);
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RETURN(result);
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}
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else if (wenclose(sub, event.y, event.x))
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{ /* Inside the area we try to find the hit item */
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int i, x, y, err;
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ry = event.y;
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rx = event.x;
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if (wmouse_trafo(sub, &ry, &rx, FALSE))
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{
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for (i = 0; i < menu->nitems; i++)
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{
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err = _nc_menu_cursor_pos(menu, menu->items[i],
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&y, &x);
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if (E_OK == err)
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{
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if ((ry == y) &&
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(rx >= x) &&
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(rx < x + menu->itemlen))
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{
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item = menu->items[i];
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result = E_OK;
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break;
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}
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}
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}
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if (E_OK == result)
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{ /* We found an item, now we can handle the click.
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* A single click just positions the menu cursor
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* to the clicked item. A double click toggles
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* the item.
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*/
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if (event.bstate & BUTTON1_DOUBLE_CLICKED)
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{
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_nc_New_TopRow_and_CurrentItem(menu,
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my_top_row,
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item);
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menu_driver(menu, REQ_TOGGLE_ITEM);
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result = E_UNKNOWN_COMMAND;
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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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else
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result = E_REQUEST_DENIED;
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}
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#endif /* NCURSES_MOUSE_VERSION */
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else
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result = E_UNKNOWN_COMMAND;
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}
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if (E_OK == result)
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{
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/* Adjust the top row if it turns out that the current item unfortunately
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doesn't appear in the menu window */
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if (item->y < my_top_row)
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my_top_row = item->y;
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else if (item->y >= (my_top_row + menu->arows))
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my_top_row = item->y - menu->arows + 1;
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_nc_New_TopRow_and_CurrentItem(menu, my_top_row, item);
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}
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RETURN(result);
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}
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/* m_driver.c ends here */
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