be7d950dc8
than at compile time. Should have same functionality as old libforms but with new mechanism. Lots of new features that use the new mechanism are still to be added.
503 lines
11 KiB
C
503 lines
11 KiB
C
/*-
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* Copyright (c) 1995
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* Paul Richards. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer,
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* verbatim and that no modifications are made prior to this
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* point in the file.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Paul Richards.
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* 4. The name Paul Richards may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY PAUL RICHARDS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL PAUL RICHARDS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#include <string.h>
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#include <stdlib.h>
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#include <ctype.h>
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#include <forms.h>
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#include <ncurses.h>
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#include "internal.h"
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unsigned int f_keymap[] = {
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KEY_UP, /* F_UP */
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KEY_DOWN, /* F_DOWN */
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9, /* F_RIGHT */
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8, /* F_LEFT */
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10, /* F_NEXT */
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KEY_LEFT, /* F_CLEFT */
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KEY_RIGHT, /* F_CRIGHT */
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KEY_HOME, /* F_CHOME */
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KEY_END, /* F_CEND */
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263, /* F_CBS */
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330, /* F_CDEL */
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10 /* F_ACCEPT */
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};
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int done=0;
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int
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initfrm(struct form *form)
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{
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struct field *field = &form->field[0];
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int i;
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if (has_colors()) {
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start_color();
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if (form->color_table)
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for (i=0; form->color_table[i].f != -1; i++) {
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init_pair(i+1, form->color_table[i].f, form->color_table[i].b);
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}
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}
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cbreak();
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noecho();
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if (!form->height)
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form->height = LINES;
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if (!form->width)
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form->width = COLS;
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form->window = newwin(form->height, form->width, form->y, form->x);
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if (!form->window) {
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print_status("Couldn't open window, closing form");
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return (ERR);
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}
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form->no_fields = 0;
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keypad(form->window, TRUE);
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while (field->type != F_END) {
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if (field->type == F_INPUT) {
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field->field.input->input = malloc(field->field.input->limit);
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if (!field->field.input->input){
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print_status("Couldn't allocate memory, closing form");
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endfrm(form);
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return (ERR);
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}
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/*
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* If it's a label then clear the input string
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* otherwise copy the default string to the input string.
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*/
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if (field->field.input->lbl_flag)
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field->field.input->input[0] = '\0';
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else if (field->field.input->label) {
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strncpy(field->field.input->input,
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field->field.input->label,
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field->field.input->limit);
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field->field.input->input[field->field.input->limit] = 0;
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}
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} else if ((field->type != F_TEXT) && (field->type != F_MENU) &&
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(field->type != F_ACTION)) {
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print_status("Unknown field type, closing form");
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endfrm(form);
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return (ERR);
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}
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form->no_fields++;
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field = &form->field[form->no_fields];
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}
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form->current_field = form->start_field;
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show_form(form);
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return (OK);
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}
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void
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endfrm(struct form *form)
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{
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struct field *field = &form->field[0];
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int i;
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delwin(form->window);
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for (i=0; i < form->no_fields; i++) {
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if (field->type == F_INPUT)
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free(field->field.input->input);
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field = &form->field[i];
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}
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}
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int
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update_form(struct form *form)
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{
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show_form(form);
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if (form->current_field == -1)
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return (F_CANCEL);
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wattrset(form->window, form->field[form->current_field].selattr);
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switch (form->field[form->current_field].type) {
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case F_MENU:
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field_menu(form);
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break;
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case F_INPUT:
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field_input(form);
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break;
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case F_ACTION:
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field_action(form);
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break;
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case F_TEXT:
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default:
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print_status("Error, current field is invalid");
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return (F_CANCEL);
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}
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wattrset(form->window, 0);
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return (done);
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}
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static void
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show_form(struct form *form)
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{
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int i;
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int y, x;
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wattrset(form->window, form->attr);
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for (y = 0; y < form->height; y++)
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for (x = 0; x < form->width; x++)
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mvwaddch(form->window, y, x, ' ');
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for (i=0; i < form->no_fields; i++) {
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wattrset(form->window, form->field[i].attr);
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wmove(form->window, form->field[i].y, form->field[i].x);
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switch (form->field[i].type) {
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case F_TEXT:
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disp_text(form, i);
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break;
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case F_MENU:
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disp_menu(form, i);
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break;
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case F_INPUT:
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disp_input(form,i);
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break;
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case F_ACTION:
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disp_action(form,i);
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break;
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case F_END:
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default:
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break;
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}
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}
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wattrset(form->window, 0);
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wrefresh(form->window);
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}
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static void
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disp_text(struct form *form, int index)
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{
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struct field *field = &form->field[index];
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if (print_string(form->window, field->y, field->x, field->height,
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field->width, field->field.text->text) == ERR)
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print_status("Illegal scroll in print_string");
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}
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static void
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disp_input(struct form *form, int index)
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{
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struct field *field = &form->field[index];
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if (field->field.input->lbl_flag) {
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if (print_string(form->window, field->y, field->x, field->height,
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field->width, field->field.input->label) == ERR)
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print_status("Illegal scroll in print_string");
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} else
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if (print_string(form->window, field->y, field->x, field->height,
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field->width, field->field.input->input) == ERR)
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print_status("Illegal scroll in print_string");
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}
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static void
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disp_menu(struct form *form, int index)
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{
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struct field *field = &form->field[index];
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if (print_string(form->window, field->y, field->x, field->height,
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field->width,
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field->field.menu->options[field->field.menu->selected]) == ERR)
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print_status("Illegal scroll in print_string");
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}
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static void
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disp_action(struct form *form, int index)
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{
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struct field *field = &form->field[index];
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if (print_string(form->window, field->y, field->x, field->height,
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field->width,
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field->field.action->text) == ERR)
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print_status("Illegal scroll in print_string");
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}
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static void
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field_action(struct form *form)
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{
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struct field *field = &form->field[form->current_field];
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int ch;
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for (;;) {
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disp_action(form, form->current_field);
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wmove(form->window, field->y, field->x);
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ch = wgetch(form->window);
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if (ch == F_ACCEPT) {
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(*field->field.action->fn)();
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return;
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} else if (!next_field(form, ch))
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beep();
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else
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return;
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}
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}
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static void
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field_menu(struct form *form)
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{
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struct field *field = &form->field[form->current_field];
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int ch;
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for (;;) {
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disp_menu(form, form->current_field);
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wmove(form->window, field->y, field->x);
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switch (ch = wgetch(form->window)) {
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case ' ':
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print_status("");
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field->field.menu->selected++;
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if (field->field.menu->selected >= field->field.menu->no_options)
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field->field.menu->selected = 0;
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break;
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default:
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if (!next_field(form, ch)) {
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print_status("Hit the space bar to toggle through options");
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beep();
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} else
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return;
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}
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}
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}
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static int
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next_field(struct form *form, int ch)
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{
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struct field *field = &form->field[form->current_field];
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if (ch == F_UP) {
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if (field->up == -1) {
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print_status("Can't go up from here");
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return (0);
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} else
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form->current_field = field->up;
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} else if (ch == F_DOWN) {
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if (field->down == -1) {
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print_status("Can't go down from here");
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return (0);
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} else
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form->current_field = field->down;
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} else if (ch == F_NEXT) {
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if (field->next == -1) {
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print_status("Can't go to next from here");
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return (0);
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} else
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form->current_field = field->next;
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} else if (ch == F_RIGHT) {
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if (field->right == -1) {
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print_status("Can't go right from here");
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return (0);
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} else
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form->current_field = field->right;
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} else if (ch == F_LEFT) {
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if (field->left == -1) {
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print_status("Can't go left from here");
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return (0);
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} else
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form->current_field = field->left;
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} else
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return (0);
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print_status("");
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return (1);
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}
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static int
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print_string(WINDOW *window, int y, int x,
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int height, int fwidth, char *string)
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{
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int len;
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int width;
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if (!string)
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len = -1;
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len = strlen(string);
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if (wmove(window, y, x) == ERR)
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return (ERR);
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while (height--) {
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width = fwidth;
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while (width--) {
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if (len-- > 0) {
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if (waddch(window, *string++) == ERR)
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return (ERR);
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} else
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if (waddch(window, ' ') == ERR)
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return (ERR);
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}
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if (wmove(window, ++y, x) == ERR)
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return (ERR);
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}
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return (OK);
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}
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void
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print_status(char *msg)
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{
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if (wmove(stdscr, LINES-1, 0) == ERR) {
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endwin();
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exit(1);
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}
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wclrtoeol(stdscr);
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wstandout(stdscr);
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if (wprintw(stdscr, "%s",
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msg) == ERR) {
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endwin();
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exit(1);
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}
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wstandend(stdscr);
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wrefresh(stdscr);
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}
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void
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field_input(struct form *form)
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{
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struct field *field = &form->field[form->current_field];
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int len;
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int ch;
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int disp_off=0, abspos=0, cursor = 0;
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#define DISPOFF ((len < field->width) ? 0 : len - field->width)
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#define CURSPOS ((len < field->width) ? len : field->width)
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len = strlen(field->field.input->input);
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disp_input(form, form->current_field);
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cursor = CURSPOS;
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abspos = cursor;
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for(;;) {
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wmove(form->window, field->y, field->x+cursor);
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wrefresh(form->window);
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ch = wgetch(form->window);
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if (next_field(form, ch)) {
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print_string(form->window, field->y, field->x,
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field->height, field->width,
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field->field.input->input+DISPOFF);
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return;
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}
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if (field->field.input->lbl_flag) {
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field->field.input->lbl_flag = 0;
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}
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if ((ch == F_CHOME) || (ch == '')) {
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disp_off = 0;
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cursor = 0;
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abspos = 0;
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} else if ((ch == F_CEND) || (ch == '')) {
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disp_off = DISPOFF;
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abspos = len;
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cursor = CURSPOS;
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} else if (ch == F_CDEL) {
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if (!(len-abspos))
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beep();
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else {
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bcopy(field->field.input->input+abspos+1,
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field->field.input->input+abspos,
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len - abspos);
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--len;
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}
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} else if ((ch == F_CLEFT) || (ch == F_CBS) || (ch == '')) {
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if (!abspos)
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beep();
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else {
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if (ch == F_CBS) {
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bcopy(field->field.input->input+abspos,
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field->field.input->input+abspos-1,
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len-abspos+1);
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--len;
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}
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--abspos;
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--cursor;
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if ((disp_off) && (cursor < 0)) {
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--disp_off;
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++cursor;
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}
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}
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} else if ((ch == F_CRIGHT) || (ch == '')) {
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if (abspos == len)
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beep();
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else {
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++abspos;
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if (++cursor == field->width) {
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++disp_off;
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--cursor;
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}
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}
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} else if ((isprint(ch)) && (len < field->field.input->limit)){
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bcopy(field->field.input->input+abspos,
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field->field.input->input+abspos+1, len-abspos+1);
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field->field.input->input[abspos++] = ch;
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len++;
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if (++cursor > field->width) {
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++disp_off;
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--cursor;
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}
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} else {
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beep();
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}
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print_string(form->window, field->y, field->x, field->height,
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field->width, field->field.input->input+disp_off);
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}
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/* Not Reached */
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}
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void
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exit_form(void)
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{
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done = F_DONE;
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}
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void
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cancel_form(void)
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{
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done = F_CANCEL;
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}
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