/*
* Program source is Copyright 1993 Colten Edwards.
* Central Data Services is granted the right to use this source
* in thier product known as Quote Menu. They are also granted the right
* to modify this source in the advent of problems and or new features
* which they may want to add to the program.
*/
#include <stdlib.h>
#include <ctype.h>
#include <ncurses.h>
#ifdef __EMX__
#include <sys/types.h>
#endif
#include "ds_cell.h"
#include "ds_keys.h"
#include "func_pr.h"
/*
* This routine sets the stage for all menu actions except those that are
* specific for a menu.
* Home, PgUp, PgDn, End, Cursor up, Cursor Dn are defined within this source
*/
/* Get the current menu item.
*
* Save the current position, save the start of the list.
* if key was not a enter key then
* Convert character to uppercase
* While double linked list is not NULL
* if entered key is equal to stored key value
* break loop
* else
* get next double linked list item
* set current item equal
*
* if double linked list item is equal to NULL
* restore current item to entry value.
* return to caller with FALSE { didn't find the a valid key}
* Set redraw = TRUE and
* return TRUE to indicate found valid key
*/
int get_current(CELL *c) {
dlistptr x = c->start;
dlistptr y = c->current;
if (c->key != ENTER) {
c->key = toupper(c->key);
while (x)
if (c->key == x->datainfo.other) {
break;
} else
x = x->nextlistptr;
c->current = x;
}
if (x == NULL) {
c->current = y;
return FALSE;
}
if(c->ListPaintProc != NULL)
(*c->ListPaintProc)(c);
return TRUE;
}
/*
* Purpose is set the list start and end values. Main use is for lists that
* stretch longer then the window settings.
*/
int set_list_end(CELL *c) {
register int x = 0;
if (c->current == NULL)
return x;
c->list_end = c->list_start;
while (x < (c->erow - c->srow)) {
if (c->list_end->nextlistptr)
c->list_end = c->list_end->nextlistptr;
else
break;
x++;
}
return x;
}
/*
Move the cursor up a line with wrapping
*/
int wrap_cursor_up (CELL * c)
{
if (!cursor_up (c))
ls_end (c);
return TRUE;
}
/*
Move the cursor down a line with wrapping
*/
int wrap_cursor_dn (CELL * c)
{
if (!cursor_dn (c))
ls_home (c);
return TRUE;
}
/*
Move the cursor up a line.
Returns: TRUE if successful.
FALSE if it fails. Fails because we are already at the
first item of the list.
*/
int cursor_up (CELL * c)
{
c->redraw = TRUE;
if (c->current == NULL)
c->redraw = FALSE;
else {
if (c->current == c->list_start) {
if (c->current->prevlistptr) {
c->current = c->list_start = c->current->prevlistptr;
set_list_end(c);
} else
c->redraw = FALSE;
} else {
if (c->current->prevlistptr)
c->current = c->current->prevlistptr;
else
c->redraw = FALSE;
}
}
c->desc_start = 0;
c->cur_pos = CURCOL;
return c->redraw;
}
/*
Move the cursor down a line.
Returns: TRUE if successful.
FALSE if it fails. Fails because we are already at the
first item of the list.
*/
int cursor_dn (CELL * c)
{
c->redraw = TRUE;
if (c->current == NULL)
c->redraw = FALSE;
else {
if (c->current == c->list_end) {
if (c->list_end->nextlistptr) {
c->list_end = c->current = c->list_end->nextlistptr;
if (c->list_start->nextlistptr)
c->list_start = c->list_start->nextlistptr;
} else
c->redraw = FALSE;
} else {
if (c->current->nextlistptr != NULL)
c->current = c->current->nextlistptr;
else
c->redraw = FALSE;
}
}
c->desc_start = 0;
c->cur_pos = CURCOL;
return c->redraw;
}
/*
* Purpose to pgup through the list values
*/
int ls_pgup (CELL * c)
{
register int pagesize = c->erow - c->srow;
if (c->current == NULL)
return TRUE;
while ((pagesize) && (c->current->prevlistptr != NULL)){
c->current = c->current->prevlistptr;
pagesize--;
}
c->list_start = c->current;
set_list_end(c);
c -> redraw = TRUE;
c->desc_start = 0;
c->cur_pos = CURCOL;
return TRUE;
}
/*
* Purpose to pgdn through the list values
*/
int ls_pgdn (CELL * c)
{
register int pagesize = c->erow - c->srow;
if (c->current == NULL)
return TRUE;
while ((pagesize) && (c->current->nextlistptr != NULL)){
c->current = c->current->nextlistptr;
pagesize--;
}
if (pagesize == 0)
c->list_start = c->current;
set_list_end(c);
c->redraw = TRUE;
c->desc_start = 0;
c->cur_pos = CURCOL;
return TRUE;
}
/*
* purpose to set the home the list.
*/
int ls_home (CELL * c)
{
c->current = c->list_start = c->start;
set_list_end(c);
c->redraw = TRUE;
return TRUE;
}
/*
* Purpose is to go to end of list.
*/
int ls_end (CELL * c)
{
int x = 0;
if (c->current == NULL)
return TRUE;
c->current = c->list_end = c->list_start = c->end;
while (x < (c->erow - c->srow)){
if (c->list_start->prevlistptr)
c->list_start = c->list_start->prevlistptr;
else
break;
x++;
}
c -> redraw = TRUE;
return TRUE;
}
/*
* This is the main routine used throughout.
* Purpose is to be a function despatcher.
* On entry
* set termkey = 0
* if we have a list entry procedure then
* exec that procedure. It usely draws the box and creates the list
* Make sure the list start and end are set so we do not overstep boundries
* While terminate key is equal to 0
* set function hit = false
* if list redraw is TRUE and we have a redraw procedure
* exec redraw procedure. Usually draws only items in the list.
* if we have a UpdateStatusProc
* exec Updatestatusproc. Usually displays counts, Menus, etc.
* if termkey is equal to 0
* if othergetkey is TRUE and othergetkeyproc is not equal to NULL
* exec othergetkeyproc. Used to provide edit functions
* else
* call get char function
* Set special to 0. Indicates which function to call, iff found in list.
* Check menu list until end of list (-1) for a matching key value.
* if key and menu item key match and function is not NULL
* set special equal to special number
* exec function and save returned value in hit.
* hit indicates whether or not we have exec'd a function for a key
* break to end of loop
* if hit is FALSE and current_event is not equal to NULL
* exec current event. This allows us to check for both upper and lower
* case keys.
* loop to top and check termkey.
*
* if termkey was set then
* we clear the list and exit function dispatch.
* return terminate key
*/
int ls_dispatch (CELL * c)
{
long x;
long hit;
c -> termkey = 0;
if ((*c -> ListEntryProc) != NULL)
x = (*c -> ListEntryProc) (c);
/*
if (c->start == NULL) {
return c->termkey;
}
*/
set_list_end(c);
while (c -> termkey == 0/* && c->start*/) {
hit = FALSE;
if (c->redraw && ((*c -> ListPaintProc) != NULL))
(*c -> ListPaintProc) (c);
if (*c -> UpdateStatusProc != NULL)
(*c -> UpdateStatusProc) (c);
if (c -> termkey == 0) {
if ((*c -> OtherGetKeyProc) != NULL && c->other_getkey)
c -> key = (*c->OtherGetKeyProc) (c);
else
c->key = getch();
#if 0
c->key = get_char (c, (int)c->menu_bar);
#endif
}
c->special = 0;
for (x = 0; c ->keytable[x].key != -1; x++)
if ((c -> keytable[x].key == c->key) && ((*c->func_table[c->keytable[x].func_num].func) != NULL)) {
c->special = c->keytable[x].func_num;
hit = (*c->func_table[c->keytable[x].func_num].func)(c);
break;
}
if (hit == FALSE && *c->current_event != NULL)
(*c -> current_event) (c);
}
if (*c -> ListExitProc != NULL)
(*c -> ListExitProc) (c);
return c -> termkey;
}
/*
* Terminate function. Set termkey to the keystroke entered.
*/
int ls_quit (CELL * c)
{
c->termkey = c->key;
return TRUE;
}
syntax highlighted by Code2HTML, v. 0.9.1