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Diffstat (limited to 'contrib/ncurses/menu/m_driver.c')
| -rw-r--r-- | contrib/ncurses/menu/m_driver.c | 540 |
1 files changed, 540 insertions, 0 deletions
diff --git a/contrib/ncurses/menu/m_driver.c b/contrib/ncurses/menu/m_driver.c new file mode 100644 index 000000000000..fef3e8ea7147 --- /dev/null +++ b/contrib/ncurses/menu/m_driver.c @@ -0,0 +1,540 @@ +/**************************************************************************** + * Copyright (c) 1998 Free Software Foundation, Inc. * + * * + * Permission is hereby granted, free of charge, to any person obtaining a * + * copy of this software and associated documentation files (the * + * "Software"), to deal in the Software without restriction, including * + * without limitation the rights to use, copy, modify, merge, publish, * + * distribute, distribute with modifications, sublicense, and/or sell * + * copies of the Software, and to permit persons to whom the Software is * + * furnished to do so, subject to the following conditions: * + * * + * The above copyright notice and this permission notice shall be included * + * in all copies or substantial portions of the Software. * + * * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * + * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * + * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * + * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * + * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * + * * + * Except as contained in this notice, the name(s) of the above copyright * + * holders shall not be used in advertising or otherwise to promote the * + * sale, use or other dealings in this Software without prior written * + * authorization. * + ****************************************************************************/ + +/**************************************************************************** + * Author: Juergen Pfeifer <juergen.pfeifer@gmx.net> 1995,1997 * + ****************************************************************************/ + +/*************************************************************************** +* Module m_driver * +* Central dispatching routine * +***************************************************************************/ + +#include "menu.priv.h" + +MODULE_ID("$Id: m_driver.c,v 1.17 1999/05/16 17:24:55 juergen Exp $") + +/* Macros */ + +/* Remove the last character from the match pattern buffer */ +#define Remove_Character_From_Pattern(menu) \ + (menu)->pattern[--((menu)->pindex)] = '\0' + +/* Add a new character to the match pattern buffer */ +#define Add_Character_To_Pattern(menu,ch) \ + { (menu)->pattern[((menu)->pindex)++] = (ch);\ + (menu)->pattern[(menu)->pindex] = '\0'; } + +/*--------------------------------------------------------------------------- +| Facility : libnmenu +| Function : static bool Is_Sub_String( +| bool IgnoreCaseFlag, +| const char *part, +| const char *string) +| +| Description : Checks whether or not part is a substring of string. +| +| Return Values : TRUE - if it is a substring +| FALSE - if it is not a substring ++--------------------------------------------------------------------------*/ +static bool Is_Sub_String( + bool IgnoreCaseFlag, + const char *part, + const char *string + ) +{ + assert( part && string ); + if ( IgnoreCaseFlag ) + { + while(*string && *part) + { + if (toupper(*string++)!=toupper(*part)) break; + part++; + } + } + else + { + while( *string && *part ) + if (*part != *string++) break; + part++; + } + return ( (*part) ? FALSE : TRUE ); +} + +/*--------------------------------------------------------------------------- +| Facility : libnmenu +| Function : int _nc_Match_Next_Character_In_Item_Name( +| MENU *menu, +| int ch, +| ITEM **item) +| +| Description : This internal routine is called for a menu positioned +| at an item with three different classes of characters: +| - a printable character; the character is added to +| the current pattern and the next item matching +| this pattern is searched. +| - NUL; the pattern stays as it is and the next item +| matching the pattern is searched +| - BS; the pattern stays as it is and the previous +| item matching the pattern is searched +| +| The item parameter contains on call a pointer to +| the item where the search starts. On return - if +| a match was found - it contains a pointer to the +| matching item. +| +| Return Values : E_OK - an item matching the pattern was found +| E_NO_MATCH - nothing found ++--------------------------------------------------------------------------*/ +int _nc_Match_Next_Character_In_Item_Name(MENU *menu, int ch, ITEM **item) +{ + bool found = FALSE, passed = FALSE; + int idx, last; + + assert( menu && item && *item); + idx = (*item)->index; + + if (ch && ch!=BS) + { + /* if we become to long, we need no further checking : there can't be + a match ! */ + if ((menu->pindex+1) > menu->namelen) + RETURN(E_NO_MATCH); + + Add_Character_To_Pattern(menu,ch); + /* we artificially position one item back, because in the do...while + loop we start with the next item. This means, that with a new + pattern search we always start the scan with the actual item. If + we do a NEXT_PATTERN oder PREV_PATTERN search, we start with the + one after or before the actual item. */ + if (--idx < 0) + idx = menu->nitems-1; + } + + last = idx; /* this closes the cycle */ + + do{ + if (ch==BS) + { /* we have to go backward */ + if (--idx < 0) + idx = menu->nitems-1; + } + else + { /* otherwise we always go forward */ + if (++idx >= menu->nitems) + idx = 0; + } + if (Is_Sub_String((menu->opt & O_IGNORECASE) != 0, + menu->pattern, + menu->items[idx]->name.str) + ) + found = TRUE; + else + passed = TRUE; + } while (!found && (idx != last)); + + if (found) + { + if (!((idx==(*item)->index) && passed)) + { + *item = menu->items[idx]; + RETURN(E_OK); + } + /* This point is reached, if we fully cycled through the item list + and the only match we found is the starting item. With a NEXT_PATTERN + or PREV_PATTERN scan this means, that there was no additional match. + If we searched with an expanded new pattern, we should never reach + this point, because if the expanded pattern matches also the actual + item we will find it in the first attempt (passed==FALSE) and we + will never cycle through the whole item array. + */ + assert( ch==0 || ch==BS ); + } + else + { + if (ch && ch!=BS && menu->pindex>0) + { + /* if we had no match with a new pattern, we have to restore it */ + Remove_Character_From_Pattern(menu); + } + } + RETURN(E_NO_MATCH); +} + +/*--------------------------------------------------------------------------- +| Facility : libnmenu +| Function : int menu_driver(MENU *menu, int c) +| +| Description : Central dispatcher for the menu. Translates the logical +| request 'c' into a menu action. +| +| Return Values : E_OK - success +| E_BAD_ARGUMENT - invalid menu pointer +| E_BAD_STATE - menu is in user hook routine +| E_NOT_POSTED - menu is not posted ++--------------------------------------------------------------------------*/ +int menu_driver(MENU * menu, int c) +{ +#define NAVIGATE(dir) \ + if (!item->dir)\ + result = E_REQUEST_DENIED;\ + else\ + item = item->dir + + int result = E_OK; + ITEM *item; + int my_top_row, rdiff; + + if (!menu) + RETURN(E_BAD_ARGUMENT); + + if ( menu->status & _IN_DRIVER ) + RETURN(E_BAD_STATE); + if ( !( menu->status & _POSTED ) ) + RETURN(E_NOT_POSTED); + + item = menu->curitem; + + my_top_row = menu->toprow; + assert(item); + + if ((c > KEY_MAX) && (c<=MAX_MENU_COMMAND)) + { + if (!((c==REQ_BACK_PATTERN) + || (c==REQ_NEXT_MATCH) || (c==REQ_PREV_MATCH))) + { + assert( menu->pattern ); + Reset_Pattern(menu); + } + + switch(c) + { + case REQ_LEFT_ITEM: + /*=================*/ + NAVIGATE(left); + break; + + case REQ_RIGHT_ITEM: + /*==================*/ + NAVIGATE(right); + break; + + case REQ_UP_ITEM: + /*===============*/ + NAVIGATE(up); + break; + + case REQ_DOWN_ITEM: + /*=================*/ + NAVIGATE(down); + break; + + case REQ_SCR_ULINE: + /*=================*/ + if (my_top_row == 0 || !(item->up)) + result = E_REQUEST_DENIED; + else + { + --my_top_row; + item = item->up; + } + break; + + case REQ_SCR_DLINE: + /*=================*/ + if ((my_top_row + menu->arows >= menu->rows) || !(item->down)) + { + /* only if the menu has less items than rows, we can deny the + request. Otherwise the epilogue of this routine adjusts the + top row if necessary */ + result = E_REQUEST_DENIED; + } + else { + my_top_row++; + item = item->down; + } + break; + + case REQ_SCR_DPAGE: + /*=================*/ + rdiff = menu->rows - (menu->arows + my_top_row); + if (rdiff > menu->arows) + rdiff = menu->arows; + if (rdiff<=0) + result = E_REQUEST_DENIED; + else + { + my_top_row += rdiff; + while(rdiff-- > 0 && item!=(ITEM*)0) + item = item->down; + } + break; + + case REQ_SCR_UPAGE: + /*=================*/ + rdiff = (menu->arows < my_top_row) ? menu->arows : my_top_row; + if (rdiff<=0) + result = E_REQUEST_DENIED; + else + { + my_top_row -= rdiff; + while(rdiff-- && item!=(ITEM*)0) + item = item->up; + } + break; + + case REQ_FIRST_ITEM: + /*==================*/ + item = menu->items[0]; + break; + + case REQ_LAST_ITEM: + /*=================*/ + item = menu->items[menu->nitems-1]; + break; + + case REQ_NEXT_ITEM: + /*=================*/ + if ((item->index+1)>=menu->nitems) + { + 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 */ |