736 lines
16 KiB
C
736 lines
16 KiB
C
/*
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* Program: objects.c
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* Author: Marc van Kempen
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* Desc: Implementation of UI-objects:
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* - String input fields
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* - List selection
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* - Buttons
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*
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* Copyright (c) 1995, Marc van Kempen
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*
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* All rights reserved.
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*
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* This software may be used, modified, copied, distributed, and
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* sold, in both source and binary form provided that the above
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* copyright and these terms are retained, verbatim, as the first
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* lines of this file. Under no circumstances is the author
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* responsible for the proper functioning of this software, nor does
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* the author assume any responsibility for damages incurred with
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* its use.
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*
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*/
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#include <stdlib.h>
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#include <sys/param.h>
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#include <ncurses.h>
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#include <dialog.h>
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#include "dialog.priv.h"
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#include "ui_objects.h"
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#define ESC 27
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/***********************************************************************
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*
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* Obj routines
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*
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***********************************************************************/
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void
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AddObj(ComposeObj **Obj, int objtype, void *obj)
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/*
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* Desc: Add the object <obj> to the list of objects <Obj>
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*/
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{
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if (*Obj == NULL) {
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/* Create the root object */
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*Obj = (ComposeObj *) malloc( sizeof(ComposeObj) );
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if (!Obj) {
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printf("AddObj: Error malloc'ing ComposeObj\n");
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exit(-1);
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}
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(*Obj)->objtype = objtype;
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(*Obj)->obj = obj;
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(*Obj)->next = NULL;
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(*Obj)->prev = NULL;
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} else {
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ComposeObj *o = *Obj;
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/* create the next object */
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while (o->next) o = (ComposeObj *) o->next;
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o->next = (struct ComposeObj *) malloc( sizeof(ComposeObj) );
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if (!o->next) {
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printf("AddObj: Error malloc'ing o->next\n");
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exit(-1);
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}
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o->next->objtype = objtype;
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o->next->obj = obj;
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o->next->next = NULL;
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o->next->prev = o;
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}
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return;
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} /* AddObj() */
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void
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FreeObj(ComposeObj *Obj)
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/*
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* Desc: free the memory occupied by *Obj
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*/
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{
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ComposeObj *o = Obj;
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o = Obj;
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while (o) {
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o = Obj->next;
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free(Obj);
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Obj = o;
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}
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return;
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} /* FreeObj() */
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int
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ReadObj(ComposeObj *Obj)
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/*
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* Desc: navigate through the different objects calling their
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* respective navigation routines as necessary
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* Pre: Obj != NULL
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*/
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{
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ComposeObj *o;
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ComposeObj *last; /* the last object in the list */
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int ret; /* the return value from the selection routine */
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/* find the last object in the list */
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last = Obj;
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while (last->next) last = last->next;
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ret = 0;
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o = Obj;
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while ((ret != SEL_BUTTON) && (ret != SEL_ESC)) {
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switch(o->objtype) {
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case STRINGOBJ:
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ret = SelectStringObj((StringObj *) o->obj);
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break;
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case LISTOBJ:
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ret = SelectListObj((ListObj *) o->obj);
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break;
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case BUTTONOBJ:
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ret = SelectButtonObj((ButtonObj *) o->obj);
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break;
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}
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switch(ret) {
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case SEL_CR:
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case SEL_TAB: /* move to the next object in the list */
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if (o->next != NULL) {
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o = o->next; /* next object */
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} else {
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o = Obj; /* beginning of the list */
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}
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break;
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case SEL_BACKTAB: /* move to the previous object in the list */
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if (o->prev != NULL) {
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o = o->prev; /* previous object */
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} else {
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o = last; /* end of the list */
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}
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break;
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case KEY_F(1): /* display help_file */
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case '?':
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display_helpfile();
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break;
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}
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}
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return(ret);
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} /* ReadObj() */
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int
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PollObj(ComposeObj **Obj)
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{
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ComposeObj *last; /* the last object in the list */
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ComposeObj *first; /* the first object in the list */
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int ret; /* the return value from the selection routine */
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/* find the last object in the list */
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last = *Obj;
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while (last->next) last = last->next;
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/* find the first object in the list */
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first = *Obj;
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while (first->prev) first = first->prev;
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ret = 0;
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switch((*Obj)->objtype) {
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case STRINGOBJ:
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ret = SelectStringObj((StringObj *) (*Obj)->obj);
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break;
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case LISTOBJ:
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ret = SelectListObj((ListObj *) (*Obj)->obj);
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break;
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case BUTTONOBJ:
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ret = SelectButtonObj((ButtonObj *) (*Obj)->obj);
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break;
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}
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switch(ret) {
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case SEL_CR:
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case SEL_TAB: /* move to the next object in the list */
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if ((*Obj)->next != NULL) {
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*Obj = (*Obj)->next; /* next object */
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} else {
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*Obj = first; /* beginning of the list */
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}
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break;
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case SEL_BACKTAB: /* move to the previous object in the list */
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if ((*Obj)->prev != NULL) {
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*Obj = (*Obj)->prev; /* previous object */
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} else {
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*Obj = last; /* end of the list */
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}
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break;
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}
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return(ret);
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} /* PollObj() */
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void
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DelObj(ComposeObj *Obj)
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/*
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* Desc: Free all objects
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*/
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{
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ComposeObj *o;
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o = Obj;
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while (Obj != NULL) {
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switch(Obj->objtype) {
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case STRINGOBJ:
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DelStringObj((StringObj *) Obj->obj);
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break;
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case LISTOBJ:
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DelListObj((ListObj *) Obj->obj);
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break;
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case BUTTONOBJ:
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DelButtonObj((ButtonObj *) Obj->obj);
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break;
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}
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Obj = Obj->next;
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}
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FreeObj(o);
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} /* DelObj() */
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/***********************************************************************
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*
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* StringObj routines
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*
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***********************************************************************/
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void
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RefreshStringObj(StringObj *so)
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/*
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* Desc: redraw the object
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*/
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{
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char tmp[512];
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wmove(so->win, so->y, so->x+1);
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wattrset(so->win, dialog_attr);
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waddstr(so->win, so->title);
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draw_box(so->win, so->y+1, so->x, 3, so->w, dialog_attr, border_attr);
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wattrset(so->win, item_attr);
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wmove(so->win, so->y+2, so->x+1);
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if (strlen(so->s) > so->w-2) {
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strncpy(tmp, (char *) so->s + strlen(so->s) - so->w + 2, so->w - 1);
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waddstr(so->win, tmp);
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} else {
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waddstr(so->win, so->s);
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}
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return;
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} /* RefreshStringObj() */
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StringObj *
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NewStringObj(WINDOW *win, char *title, char *s, int y, int x, int w, int len)
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/*
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* Desc: Initialize a new stringobj and return a pointer to it.
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* Draw the object on the screen at the specified coordinates
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*/
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{
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StringObj *so;
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/* Initialize a new object */
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so = (StringObj *) malloc( sizeof(StringObj) );
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if (!so) {
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printf("NewStringObj: Error malloc'ing StringObj\n");
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exit(-1);
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}
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so->title = (char *) malloc( strlen(title) + 1);
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if (!so->title) {
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printf("NewStringObj: Error malloc'ing so->title\n");
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exit(-1);
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}
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strcpy(so->title, title);
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so->s = s;
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strcpy(so->s, s);
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so->x = x;
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so->y = y;
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so->w = w;
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so->len = len;
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so->win = win;
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/* Draw it on the screen */
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RefreshStringObj(so);
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return(so);
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} /* NewStringObj() */
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int
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SelectStringObj(StringObj *so)
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/*
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* Desc: get input using the info in <so>
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*/
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{
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int key;
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char tmp[so->len+1];
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strcpy(tmp, so->s);
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key = line_edit(so->win, so->y+2, so->x+1,
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so->len, so->w-2, inputbox_attr, TRUE, tmp);
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if ((key == '\n') || (key == '\r')) {
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strcpy(so->s, tmp);
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}
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RefreshStringObj(so);
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if (key == ESC) {
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return(SEL_ESC);
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}
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if (key == '\t') {
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return(SEL_TAB);
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}
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if ( (key == KEY_BTAB) || (key == KEY_F(2)) ) {
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return(SEL_BACKTAB);
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}
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if ((key == '\n') || (key == '\r')) {
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strcpy(so->s, tmp);
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return(SEL_CR);
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}
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return(key);
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} /* SelectStringObj() */
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void
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DelStringObj(StringObj *so)
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/*
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* Desc: Free the space occupied by <so>
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*/
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{
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free(so->title);
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free(so);
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return;
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}
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/***********************************************************************
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*
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* ListObj routines
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*
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***********************************************************************/
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void
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DrawNames(ListObj *lo)
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/*
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* Desc: Just refresh the names, not the surrounding box and title
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*/
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{
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int i, j, h, x, y;
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char tmp[MAXPATHLEN];
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x = lo->x + 1;
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y = lo->y + 2;
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h = lo->h - 2;
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wattrset(lo->win, item_attr);
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for (i=lo->scroll; i<lo->n && i<lo->scroll+h; i++) {
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wmove(lo->win, y+i-lo->scroll, x);
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if (strlen(lo->name[i]) > lo->w-2) {
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strncpy(tmp, lo->name[i], lo->w-2);
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tmp[lo->w - 2] = 0;
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waddstr(lo->win, tmp);
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} else {
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waddstr(lo->win, lo->name[i]);
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for (j=strlen(lo->name[i]); j<lo->w-2; j++) waddstr(lo->win, " ");
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}
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}
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while (i<lo->scroll+h) {
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wmove(lo->win, y+i-lo->scroll, x);
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for (j=0; j<lo->w-2; j++) waddstr(lo->win, " ");
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i++;
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}
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return;
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} /* DrawNames() */
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void
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RefreshListObj(ListObj *lo)
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/*
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* Desc: redraw the list object
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*/
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{
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char perc[7];
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/* setup the box */
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wmove(lo->win, lo->y, lo->x+1);
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wattrset(lo->win, dialog_attr);
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waddstr(lo->win, lo->title);
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draw_box(lo->win, lo->y+1, lo->x, lo->h, lo->w, dialog_attr, border_attr);
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/* draw the names */
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DrawNames(lo);
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/* Draw % indication */
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sprintf(perc, "(%3d%%)", MIN(100, (int) (100 * (lo->sel+lo->h-2) / MAX(1, lo->n))));
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wmove(lo->win, lo->y + lo->h, lo->x + lo->w - 8);
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wattrset(lo->win, dialog_attr);
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waddstr(lo->win, perc);
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return;
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} /* RefreshListObj() */
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ListObj *
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NewListObj(WINDOW *win, char *title, char **list, char *listelt, int y, int x,
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int h, int w, int n)
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/*
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* Desc: create a listobj, draw it on the screen and return a pointer to it.
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*/
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{
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ListObj *lo;
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/* Initialize a new object */
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lo = (ListObj *) malloc( sizeof(ListObj) );
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if (!lo) {
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printf("NewListObj: Error malloc'ing ListObj\n");
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exit(-1);
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}
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lo->title = (char *) malloc( strlen(title) + 1);
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if (!lo->title) {
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printf("NewListObj: Error malloc'ing lo->title\n");
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exit(-1);
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}
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strcpy(lo->title, title);
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lo->name = list;
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lo->y = y;
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lo->x = x;
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lo->w = w;
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lo->h = h;
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lo->n = n;
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lo->scroll = 0;
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lo->sel = 0;
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lo->elt = listelt;
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lo->win = win;
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/* Draw the object on the screen */
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RefreshListObj(lo);
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return(lo);
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} /* NewListObj() */
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void
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UpdateListObj(ListObj *lo, char **list, int n)
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/*
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* Desc: Update the list in the listobject with the provided list
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* Pre: lo->name "has been allocated"
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* (A i: 0<=i<lo->n: "lo->name[i] has been allocated")
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*/
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{
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int i;
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/* Free the current names */
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if (lo->name != NULL) {
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for (i=0; i<lo->n; i++) {
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free(lo->name[i]);
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}
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free(lo->name);
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}
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/* Rewrite the list in the object */
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lo->name = list;
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lo->n = n;
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lo->scroll = 0;
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lo->sel = 0;
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/* Draw the object on the screen */
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RefreshListObj(lo);
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return;
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} /* UpdateListObj() */
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|
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int
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SelectListObj(ListObj *lo)
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/*
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* Desc: get a listname (or listnames), TAB to move on, or ESC ESC to exit
|
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* Pre: lo->n >= 1
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*/
|
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{
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int key, sel_x, sel_y;
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char tmp[MAXPATHLEN];
|
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char perc[4];
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sel_x = lo->x+1;
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sel_y = lo->y + 2 + lo->sel - lo->scroll;
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if (lo->n == 0) return(SEL_TAB);
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keypad(lo->win, TRUE);
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|
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/* Draw current selection in inverse video */
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wmove(lo->win, sel_y, sel_x);
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wattrset(lo->win, item_selected_attr);
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waddstr(lo->win, lo->name[lo->sel]);
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key = wgetch(lo->win);
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while ((key != '\t') && (key != '\n') && (key != '\r')
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&& (key != ESC) && (key != KEY_F(1)) && (key != '?')) {
|
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/* first draw current item in normal video */
|
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wmove(lo->win, sel_y, sel_x);
|
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wattrset(lo->win, item_attr);
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if (strlen(lo->name[lo->sel]) > lo->w - 2) {
|
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strncpy(tmp, lo->name[lo->sel], lo->w - 2);
|
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tmp[lo->w - 2] = 0;
|
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waddstr(lo->win, tmp);
|
|
} else {
|
|
waddstr(lo->win, lo->name[lo->sel]);
|
|
}
|
|
|
|
switch (key) {
|
|
case KEY_DOWN:
|
|
case ctrl('n'):
|
|
if (sel_y < lo->y + lo->h-1) {
|
|
if (lo->sel < lo->n-1) {
|
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sel_y++;
|
|
lo->sel++;
|
|
}
|
|
} else {
|
|
if (lo->sel < lo->n-1) {
|
|
lo->sel++;
|
|
lo->scroll++;
|
|
DrawNames(lo);
|
|
wrefresh(lo->win);
|
|
}
|
|
}
|
|
break;
|
|
case KEY_UP:
|
|
case ctrl('p'):
|
|
if (sel_y > lo->y+2) {
|
|
if (lo->sel > 0) {
|
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sel_y--;
|
|
lo->sel--;
|
|
}
|
|
} else {
|
|
if (lo->sel > 0) {
|
|
lo->sel--;
|
|
lo->scroll--;
|
|
DrawNames(lo);
|
|
wrefresh(lo->win);
|
|
}
|
|
}
|
|
break;
|
|
case KEY_HOME:
|
|
case ctrl('a'):
|
|
lo->sel = 0;
|
|
lo->scroll = 0;
|
|
sel_y = lo->y + 2;
|
|
DrawNames(lo);
|
|
wrefresh(lo->win);
|
|
break;
|
|
case KEY_END:
|
|
case ctrl('e'):
|
|
if (lo->n < lo->h - 3) {
|
|
lo->sel = lo->n-1;
|
|
lo->scroll = 0;
|
|
sel_y = lo->y + 2 + lo->sel - lo->scroll;
|
|
} else {
|
|
/* more than one page of list */
|
|
lo->sel = lo->n-1;
|
|
lo->scroll = lo->n-1 - (lo->h-3);
|
|
sel_y = lo->y + 2 + lo->sel - lo->scroll;
|
|
DrawNames(lo);
|
|
wrefresh(lo->win);
|
|
}
|
|
break;
|
|
case KEY_NPAGE:
|
|
case ctrl('f'):
|
|
lo->sel += lo->h - 2;
|
|
if (lo->sel >= lo->n) lo->sel = lo->n - 1;
|
|
lo->scroll += lo->h - 2;
|
|
if (lo->scroll >= lo->n - 1) lo->scroll = lo->n - 1;
|
|
if (lo->scroll < 0) lo->scroll = 0;
|
|
sel_y = lo->y + 2 + lo->sel - lo->scroll;
|
|
DrawNames(lo);
|
|
wrefresh(lo->win);
|
|
break;
|
|
case KEY_PPAGE:
|
|
case ctrl('b'):
|
|
lo->sel -= lo->h - 2;
|
|
if (lo->sel < 0) lo->sel = 0;
|
|
lo->scroll -= lo->h - 2;
|
|
if (lo->scroll < 0) lo->scroll = 0;
|
|
sel_y = lo->y + 2 + lo->sel - lo->scroll;
|
|
DrawNames(lo);
|
|
wrefresh(lo->win);
|
|
break;
|
|
}
|
|
/* Draw % indication */
|
|
sprintf(perc, "(%3d%%)", MIN(100, (int)
|
|
(100 * (lo->sel+lo->h - 2) / MAX(1, lo->n))));
|
|
wmove(lo->win, lo->y + lo->h, lo->x + lo->w - 8);
|
|
wattrset(lo->win, dialog_attr);
|
|
waddstr(lo->win, perc);
|
|
|
|
/* draw current item in inverse */
|
|
wmove(lo->win, sel_y, sel_x);
|
|
wattrset(lo->win, item_selected_attr);
|
|
if (strlen(lo->name[lo->sel]) > lo->w - 2) {
|
|
/* when printing in inverse video show the last characters in the */
|
|
/* name that will fit in the window */
|
|
strncpy(tmp,
|
|
lo->name[lo->sel] + strlen(lo->name[lo->sel]) - (lo->w - 2),
|
|
lo->w - 2);
|
|
tmp[lo->w - 2] = 0;
|
|
waddstr(lo->win, tmp);
|
|
} else {
|
|
waddstr(lo->win, lo->name[lo->sel]);
|
|
}
|
|
key = wgetch(lo->win);
|
|
}
|
|
|
|
if (key == ESC) {
|
|
return(SEL_ESC);
|
|
}
|
|
if (key == '\t') {
|
|
return(SEL_TAB);
|
|
}
|
|
if ((key == KEY_BTAB) || (key == ctrl('b'))) {
|
|
return(SEL_BACKTAB);
|
|
}
|
|
if ((key == '\n') || (key == '\r')) {
|
|
strcpy(lo->elt, lo->name[lo->sel]);
|
|
return(SEL_CR);
|
|
}
|
|
return(key);
|
|
} /* SelectListObj() */
|
|
|
|
void
|
|
DelListObj(ListObj *lo)
|
|
/*
|
|
* Desc: Free the space occupied by the listobject
|
|
*/
|
|
{
|
|
int i;
|
|
|
|
free(lo->title);
|
|
if (lo->name != NULL) {
|
|
for (i=0; i<lo->n; i++) {
|
|
free(lo->name[i]);
|
|
}
|
|
free(lo->name);
|
|
}
|
|
|
|
free(lo);
|
|
|
|
} /* DelListObj() */
|
|
|
|
|
|
/***********************************************************************
|
|
*
|
|
* ButtonObj routines
|
|
*
|
|
***********************************************************************/
|
|
|
|
|
|
void
|
|
RefreshButtonObj(ButtonObj *bo)
|
|
/*
|
|
* Desc: redraw the button
|
|
*/
|
|
{
|
|
draw_box(bo->win, bo->y, bo->x, 3, bo->w, dialog_attr, border_attr);
|
|
print_button(bo->win, bo->title, bo->y+1, bo->x+2, FALSE);
|
|
|
|
return;
|
|
} /* RefreshButtonObj() */
|
|
|
|
ButtonObj *
|
|
NewButtonObj(WINDOW *win, char *title, int *pushed, int y, int x)
|
|
/*
|
|
* Desc: Create a new button object
|
|
*/
|
|
{
|
|
ButtonObj *bo;
|
|
|
|
bo = (ButtonObj *) malloc( sizeof(ButtonObj) );
|
|
|
|
bo->win = win;
|
|
bo->title = (char *) malloc( strlen(title) + 1);
|
|
strcpy(bo->title, title);
|
|
bo->x = x;
|
|
bo->y = y;
|
|
bo->w = strlen(title) + 6;
|
|
bo->h = 3;
|
|
bo->pushed = pushed;
|
|
|
|
RefreshButtonObj(bo);
|
|
|
|
return(bo);
|
|
} /* NewButtonObj() */
|
|
|
|
int
|
|
SelectButtonObj(ButtonObj *bo)
|
|
/*
|
|
* Desc: Wait for buttonpresses or TAB's to move on, or ESC ESC
|
|
*/
|
|
{
|
|
int key;
|
|
|
|
print_button(bo->win, bo->title, bo->y+1, bo->x+2, TRUE);
|
|
wmove(bo->win, bo->y+1, bo->x+(bo->w/2)-1);
|
|
key = wgetch(bo->win);
|
|
print_button(bo->win, bo->title, bo->y+1, bo->x+2, FALSE);
|
|
switch(key) {
|
|
case '\t':
|
|
return(SEL_TAB);
|
|
break;
|
|
case KEY_BTAB:
|
|
case ctrl('b'):
|
|
return(SEL_BACKTAB);
|
|
case '\n':
|
|
*(bo->pushed) = TRUE;
|
|
return(SEL_BUTTON);
|
|
break;
|
|
case ESC:
|
|
return(SEL_ESC);
|
|
break;
|
|
default:
|
|
return(key);
|
|
break;
|
|
}
|
|
} /* SelectButtonObj() */
|
|
|
|
void
|
|
DelButtonObj(ButtonObj *bo)
|
|
/*
|
|
* Desc: Free the space occupied by <bo>
|
|
*/
|
|
{
|
|
free(bo->title);
|
|
free(bo);
|
|
|
|
return;
|
|
} /* DelButtonObj() */
|