menu.c

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/****************************************************************************
*
*                            Open Watcom Project
*
*    Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
*
*  ========================================================================
*
*    This file contains Original Code and/or Modifications of Original
*    Code as defined in and that are subject to the Sybase Open Watcom
*    Public License version 1.0 (the 'License'). You may not use this file
*    except in compliance with the License. BY USING THIS FILE YOU AGREE TO
*    ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is
*    provided with the Original Code and Modifications, and is also
*    available at www.sybase.com/developer/opensource.
*
*    The Original Code and all software distributed under the License are
*    distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
*    EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM
*    ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF
*    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR
*    NON-INFRINGEMENT. Please see the License for the specific language
*    governing rights and limitations under the License.
*
*  ========================================================================
*
* Description:  Menu processing routines for vi.
*
****************************************************************************/


#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <ctype.h>
#include "vi.h"
#include "colors.h"
#include "keys.h"
#include "menu.h"
#include "win.h"

typedef struct menu_item {
    struct menu_item    *next,*prev;
    char                hi;
    char                hioff;
    char                slen;
    char                *cmd;
    char                str[1];
} menu_item;

typedef struct {
    char        hi;
    char        hioff;
} hilst;

typedef struct menu {
    struct menu *next,*prev;
    menu_item   *itemhead,*itemtail;
    int         itemcnt;
    int         orig_itemcnt;
    char        **list;
    hilst       *hilist;
    char        has_file_list:1;
    char        need_hook:1;
    char        has_last_files:1;
    char        spare:5;
    char        maxwidth;
    char        orig_maxwidth;
    char        hi;
    char        hioff;
    char        slen;
    char        str[1];
} menu;

int CurrentMenuNumber;

static int      menuCnt;

static menu     *menuHead,*menuTail,*currMenu;
static menu     *windowGadgetMenu;
static menu     *floatMenus[MAX_FLOAT_MENUS] = { NULL, NULL, NULL, NULL };

/*
 * getMenuName - get name of menu, including '&' character
 */
static void getMenuName( char *res, char *str, int slen, int hioff )
{
    int i;

    for( i=0;i<=slen;i++ ) {
        if( i == hioff ) {
            *res++ = '&';
        }
        *res++ = str[i];
    }

} /* getMenuName */

/*
 * dumpMenu - dump contents of a menu
 */
static void dumpMenu( FILE *f, menu *cmenu )
{
    menu_item   *citem;
    char        str[MAX_STR];

    citem = cmenu->itemhead;
    while( citem != NULL ) {
        if( citem->slen == 0 ) {
            MyFprintf( f, "    menuitem \"\"\n" );
        } else {
            getMenuName( str, citem->str, citem->slen, citem->hioff );
            MyFprintf( f, "    menuitem \"%s\" %s\n", str, citem->cmd );
        }
        citem = citem->next;
    }
    if( cmenu->has_file_list ) {
        MyFprintf( f, "    menuwindowlist\n" );
    }

} /* dumpMenu */

/*
 * BarfMenuData - write out menu data to a specified file handle
 */
void BarfMenuData( FILE *f )
{
    menu        *cmenu;
    char        str[MAX_STR];

    if( windowGadgetMenu != NULL ) {
        MyFprintf( f, "menu windowgadget\n" );
        dumpMenu( f, windowGadgetMenu );
        MyFprintf( f, "endmenu\n" );
    }
    cmenu = menuHead;
    while( cmenu != NULL ) {
        getMenuName( str, cmenu->str, cmenu->slen, cmenu->hioff );
        if( cmenu->need_hook ) {
            MyFprintf( f, "menu %s 1\n", str );
        } else {
            MyFprintf( f, "menu %s\n", str );
        }
        dumpMenu( f, cmenu );
        MyFprintf( f, "endmenu\n" );
        cmenu = cmenu->next;
    }

} /* BarfMenuData */

/*
 * extractMenuStr - get the string and activation char for a menu item
 */
static int extractMenuStr( char *str, int *hioff )
{
    int         len,i,j;
    char        ch;

    len = strlen( str );
    *hioff = 0;
    for( i=0;i<len;i++ ) {
        if( str[i] == '&' ) {
            ch = str[i+1];
            *hioff = i;
            for( j=i+1;j<=len;j++ ) {
                str[j-1] = str[j];
            }
            return( ch );
        }
    }
    return( -1 );

} /* extractMenuStr */

/*
 * freeMenuData - release data associated with a menu
 */
static void freeMenuData( menu *cmenu )
{
    menu_item   *curr,*next;
    menu        *tmp;

    if( cmenu == NULL ) {
        return;
    }
    MemFree( cmenu->list );
    MemFree( cmenu->hilist );
    curr = cmenu->itemhead;
    while( curr != NULL ) {
        next = curr->next;
        MemFree( curr );
        curr = next;
    }
    tmp = cmenu->next;
    memset( cmenu, 0, sizeof( menu ) );
    cmenu->next = tmp;

} /* freeMenuData */

/*
 * freeMenu - free up a given menu
 */
static void freeMenu( menu *menu )
{
    freeMenuData( menu );
    MemFree( menu );

} /* freeMenu */

/*
 * findMenu - locate pointer to a given menu
 */
static menu *findMenu( char *str, menu ***predef_menu )
{
    int         len;
    menu        *res;
    int         num;

    len = strlen( str );
    *predef_menu = NULL;
    res = NULL;
    if( str[0] == 'f' || str[0] == 'w' ) {
        if( !strnicmp( str, "float", 5 ) ) {
            num = str[5] - '0';
            if( num >=0 && num < MAX_FLOAT_MENUS ) {
                res = floatMenus[num];
                *predef_menu = &floatMenus[num];
            }
        } else if( !stricmp( str, "windowgadget" ) ) {
            res = windowGadgetMenu;
            *predef_menu = &windowGadgetMenu;
        }
    }

    if( res == NULL ) {
        res = menuHead;
        while( res != NULL ) {
            if( !stricmp( str, res->str ) ) {
                break;
            }
            res = res->next;
        }
    }
    return( res );

} /* findMenu */

/*
 * StartMenu - start a new top level menu
 */
int StartMenu( char *data )
{
    char        str[MAX_STR];
    menu        *tmp;
    char        ch;
    int         hioff;
    int         len;
    bool        new;
    bool        need_hook;
    menu        **predef_menu;

    GetStringWithPossibleQuote( data, str );
    RemoveLeadingSpaces( data );
    need_hook = FALSE;
    if( data[0] != 0 ) {
        need_hook = TRUE;
    }

    if( currMenu != NULL ) {
        return( ERR_INVALID_MENU );
    }
    new = FALSE;

    ch = extractMenuStr( str, &hioff );
    len = strlen( str );

    tmp = findMenu( str, &predef_menu );
    if( predef_menu != NULL ) {
        freeMenuData( tmp );
    }

    if( tmp == NULL ) {
        tmp = MemAlloc( sizeof( menu ) + len );
        new = TRUE;
    }
    if( predef_menu == NULL ) {
        if( new ) {
            AddLLItemAtEnd( (ss**)&menuHead, (ss**)&menuTail, (ss*)tmp );
        } else {
            freeMenuData( tmp );
        }
    } else {
        *predef_menu = tmp;
    }
    strcpy( tmp->str, str );
    tmp->hi = ch;
    tmp->hioff = hioff;
    tmp->slen = len;
    tmp->need_hook = need_hook;
    currMenu = tmp;
    return( ERR_NO_ERR );

} /* StartMenu */

/*
 * initMenuList - set up lists for current menu
 */
static void initMenuList( menu *cmenu )
{
    menu_item   *cmi;
    int         i;

    MemFree( cmenu->list );
    MemFree( cmenu->hilist );
    cmenu->list = MemAlloc( sizeof( char * ) * cmenu->itemcnt );
    cmenu->hilist = MemAlloc( sizeof( hilst) * (cmenu->itemcnt+1) );

    cmi = cmenu->itemhead;
    for( i=0;i<cmenu->itemcnt; i++ ) {
        cmenu->list[i] = cmi->str;
        cmenu->hilist[i].hi = cmi->hi;
        cmenu->hilist[i].hioff = cmi->hioff;
        cmi = cmi->next;
    }
    cmenu->hilist[i].hi = 0;
    cmenu->hilist[i].hioff = 0;

} /* initMenuList */

/*
 * ViEndMenu - terminate new menu
 */
int ViEndMenu( void )
{
    char        ch;

    if( currMenu == NULL ) {
        return( ERR_INVALID_MENU );
    }
    if( currMenu == menuTail ) {
        menuCnt++;
    }
    ch = toupper( currMenu->hi );
    if( ch >= 'A' && ch <='Z' ) {
        ch = ch - 'A' + VI_KEY( ALT_A );
        EventList[ ch ].rtn.old = DoMenu;
        EventList[ ch ].b.keep_selection = TRUE;
        EventList[ ch ].alt_rtn.old = DoMenu;
        EventList[ ch ].alt_b.keep_selection = TRUE;
    }

    initMenuList( currMenu );
    currMenu = NULL;
    InitMenu();

    return( ERR_NO_ERR );

} /* ViEndMenu */

/*
 * MenuItem - add new item current menu
 */
int MenuItem( char *data )
{
    char        str[MAX_STR];
    int         len;
    int         size;
    char        ch;
    menu_item   *tmp;
    int         hioff;

    if( currMenu == NULL ) {
        return( ERR_INVALID_MENU );
    }
    GetStringWithPossibleQuote( data, str );
    RemoveLeadingSpaces( data );
    ch = extractMenuStr( str, &hioff );
    len = strlen( str );
    size = sizeof( menu_item ) + len + strlen( data ) + 2;
    tmp = MemAlloc( size );
    tmp->slen = len;
    tmp->hi = ch;
    tmp->hioff = hioff;
    strcpy( tmp->str, str );
    tmp->cmd = &(tmp->str[len+1]);
    strcpy( tmp->cmd, data );
    if( len > currMenu->maxwidth ) {
        currMenu->maxwidth = len;
    }

    AddLLItemAtEnd( (ss**)&currMenu->itemhead, (ss**)&currMenu->itemtail, (ss*)tmp );

    currMenu->itemcnt++;
    return( ERR_NO_ERR );

} /* MenuItem */

/*
 * DoItemDelete - delete an item from a menu
 */
int DoItemDelete( char *data )
{
    menu        *cmenu,**predef_menu;
    char        mname[MAX_STR];
    char        str[MAX_STR];
    menu_item   *cmi,*dmi;
    int         i,id,mwid;

    if( currMenu != NULL ) {
        return( ERR_INVALID_MENU );
    }
    NextWord1( data, mname );
    cmenu = findMenu( mname, &predef_menu );
    if( cmenu == NULL ) {
        return( ERR_INVALID_MENU );
    }
    NextWord1( data, str );
    id = atoi( str );
    if( id < 0 ) {
        id = cmenu->itemcnt-1;
    }
    if( id >= cmenu->itemcnt ) {
        return( ERR_INVALID_MENU );
    }
    i = 0;
    mwid = 0;
    dmi = NULL;
    for( cmi=cmenu->itemhead; cmi != NULL; cmi = cmi->next ) {
        if( i == id ) {
            dmi = cmi;
        } else {
            if( cmi->slen > mwid ) {
                mwid = cmi->slen;
            }
        }
        i++;
    }
    if( dmi == NULL ) {
        return( ERR_INVALID_MENU );
    }

    cmenu->itemcnt--;
    cmenu->maxwidth = mwid;
    DeleteLLItem( (ss**)&cmenu->itemhead, (ss**)&cmenu->itemtail, (ss*)dmi );
    MemFree( dmi );
    initMenuList( cmenu );
    return( ERR_NO_ERR );

} /* DoItemDelete */

/*
 * AddMenuItem - add a menu item to an already created menu
 */
int AddMenuItem( char *data )
{
    menu        *cmenu,**predef_menu;
    char        mname[MAX_STR];
    int         rc;

    if( currMenu != NULL ) {
        return( ERR_INVALID_MENU );
    }
    NextWord1( data, mname );
    cmenu = findMenu( mname, &predef_menu );
    if( cmenu == NULL ) {
        return( ERR_INVALID_MENU );
    }
    currMenu = cmenu;
    rc = MenuItem( data );
    initMenuList( currMenu );
    currMenu = NULL;
    return( rc );

} /* AddMenuItem */

/*
 * DoMenuDelete - delete an existing menu
 */
int DoMenuDelete( char *data )
{
    menu        *cmenu,**predef_menu;
    char        mname[MAX_STR];

    if( currMenu != NULL ) {
        return( ERR_INVALID_MENU );
    }
    NextWord1( data, mname );
    cmenu = findMenu( mname, &predef_menu );
    if( cmenu == NULL ) {
        return( ERR_INVALID_MENU );
    }
    if( predef_menu != NULL ) {
        freeMenu( cmenu );
        *predef_menu = NULL;
        return( ERR_NO_ERR );
    }
    DeleteLLItem( (ss**)&menuHead, (ss**)&menuTail, (ss*)cmenu );
    freeMenu( cmenu );
    menuCnt--;
    InitMenu();
    return( ERR_NO_ERR );

} /* DeleteMenu */

/*
 * addFileList - add a list of files to the current menu
 */
static void addFileList( menu *cmenu )
{
    char        buff[MAX_STR];
    info        *cinfo;
    int         cnt;

    currMenu = cmenu;

    cmenu->orig_itemcnt = cmenu->itemcnt;
    cmenu->orig_maxwidth = cmenu->maxwidth;