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395 lines
10 KiB
C
395 lines
10 KiB
C
/****************************************************************************
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* Copyright 2020 Thomas E. Dickey *
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* *
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* Permission is hereby granted, free of charge, to any person obtaining a *
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* copy of this software and associated documentation files (the *
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* "Software"), to deal in the Software without restriction, including *
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* without limitation the rights to use, copy, modify, merge, publish, *
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* distribute, distribute with modifications, sublicense, and/or sell *
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* copies of the Software, and to permit persons to whom the Software is *
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* furnished to do so, subject to the following conditions: *
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* *
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* The above copyright notice and this permission notice shall be included *
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* in all copies or substantial portions of the Software. *
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* *
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
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* IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
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* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
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* THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
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* *
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* Except as contained in this notice, the name(s) of the above copyright *
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* holders shall not be used in advertising or otherwise to promote the *
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* sale, use or other dealings in this Software without prior written *
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* authorization. *
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****************************************************************************/
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/*
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* $Id: dup_field.c,v 1.1 2020/03/21 19:28:36 tom Exp $
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*
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* Demonstrate move_field().
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*/
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#include <test.priv.h>
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#if USE_LIBFORM
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#include <edit_field.h>
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#include <popup_msg.h>
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#define MY_DEMO EDIT_FIELD('f')
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static char empty[] = "";
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static FIELD *all_fields[100];
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/* *INDENT-OFF* */
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static struct {
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int code;
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int result;
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const char *help;
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} commands[] = {
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{ CTRL('A'), REQ_BEG_FIELD, "go to beginning of field" },
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{ CTRL('D'), REQ_DOWN_FIELD, "move downward to field" },
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{ CTRL('E'), REQ_END_FIELD, "go to end of field" },
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{ CTRL('G'), MY_DEMO, "move current field with cursor keys" },
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{ CTRL('H'), REQ_DEL_PREV, "delete previous character" },
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{ CTRL('I'), REQ_NEXT_FIELD, "go to next field" },
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{ CTRL('K'), REQ_CLR_EOF, "clear to end of field" },
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{ CTRL('N'), REQ_NEXT_FIELD, "go to next field" },
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{ CTRL('P'), REQ_PREV_FIELD, "go to previous field" },
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{ CTRL('Q'), MY_QUIT, "exit form" },
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{ CTRL('U'), REQ_UP_FIELD, "move upward to field" },
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{ CTRL('W'), REQ_NEXT_WORD, "go to next word" },
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{ CTRL('X'), REQ_CLR_FIELD, "clear field" },
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{ CTRL('['), MY_QUIT, "exit form" },
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{ KEY_F(1), MY_HELP, "show this screen", },
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{ KEY_BACKSPACE, REQ_DEL_PREV, "delete previous character" },
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{ KEY_BTAB, REQ_PREV_FIELD, "go to previous field" },
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{ KEY_DOWN, REQ_DOWN_CHAR, "move down 1 character" },
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{ KEY_END, REQ_LAST_FIELD, "go to last field" },
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{ KEY_HOME, REQ_FIRST_FIELD, "go to first field" },
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{ KEY_LEFT, REQ_LEFT_CHAR, "move left 1 character" },
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{ KEY_NEXT, REQ_NEXT_FIELD, "go to next field" },
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{ KEY_PREVIOUS, REQ_PREV_FIELD, "go to previous field" },
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{ KEY_RIGHT, REQ_RIGHT_CHAR, "move right 1 character" },
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{ KEY_UP, REQ_UP_CHAR, "move up 1 character" }
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};
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/* *INDENT-ON* */
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static void
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my_help_edit_field(void)
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{
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int used = 0;
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unsigned n;
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char **msgs = typeCalloc(char *, 3 + SIZEOF(commands));
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msgs[used++] = strdup("Defined form edit/traversal keys:");
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for (n = 0; n < SIZEOF(commands); ++n) {
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char *msg;
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const char *name;
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const char *code = keyname(commands[n].code);
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size_t need = 5;
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#ifdef NCURSES_VERSION
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if ((name = form_request_name(commands[n].result)) == 0)
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#endif
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name = commands[n].help;
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need = 5 + strlen(code) + strlen(name);
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msg = typeMalloc(char, need);
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_nc_SPRINTF(msg, _nc_SLIMIT(need) "%s -- %s", code, name);
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msgs[used++] = msg;
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}
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msgs[used++] =
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strdup("Arrow keys move within a field as you would expect.");
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msgs[used] = 0;
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popup_msg2(stdscr, msgs);
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for (n = 0; msgs[n] != 0; ++n) {
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free(msgs[n]);
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}
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free(msgs);
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}
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static void
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do_demo(FORM *form)
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{
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}
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static FIELD *
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make_label(const char *label, int frow, int fcol)
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{
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FIELD *f = new_field(1, (int) strlen(label), frow, fcol, 0, 0);
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if (f) {
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set_field_buffer(f, 0, label);
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set_field_opts(f, (int) ((unsigned) field_opts(f) & ~O_ACTIVE));
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}
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return (f);
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}
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static FIELD *
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make_field(int frow, int fcol, int rows, int cols)
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{
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FIELD *f = new_field(rows, cols, frow, fcol, 0, 1);
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if (f) {
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set_field_back(f, A_UNDERLINE);
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init_edit_field(f, empty);
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}
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return (f);
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}
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static void
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erase_form(FORM *f)
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{
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WINDOW *w = form_win(f);
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WINDOW *s = form_sub(f);
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unpost_form(f);
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werase(w);
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wrefresh(w);
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delwin(s);
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delwin(w);
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}
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static int
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my_form_driver(FORM *form, int c)
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{
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switch (c) {
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case MY_QUIT:
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if (form_driver(form, REQ_VALIDATION) == E_OK)
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return (TRUE);
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break;
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case MY_HELP:
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my_help_edit_field();
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break;
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case MY_DEMO:
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do_demo(form);
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break;
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default:
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beep();
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break;
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}
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return (FALSE);
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}
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static FieldAttrs *
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my_field_attrs(FIELD *f)
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{
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return (FieldAttrs *) field_userptr(f);
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}
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static int
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buffer_length(FIELD *f)
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{
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return my_field_attrs(f)->row_lengths[0];
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}
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static void
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set_buffer_length(FIELD *f, int length)
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{
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my_field_attrs(f)->row_lengths[0] = length;
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}
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static int
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offset_in_field(FORM *form)
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{
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FIELD *field = current_field(form);
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int currow, curcol;
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form_getyx(form, currow, curcol);
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return curcol + currow * (int) field->dcols;
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}
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static void
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inactive_field(FIELD *f)
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{
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set_field_back(f, my_field_attrs(f)->background);
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}
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static int
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my_edit_field(FORM *form, int *result)
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{
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int ch = wgetch(form_win(form));
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int status;
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FIELD *before;
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unsigned n;
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int length;
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int before_row;
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int before_col;
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int before_off = offset_in_field(form);
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form_getyx(form, before_row, before_col);
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before = current_field(form);
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set_field_back(before, A_NORMAL);
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if (ch <= KEY_MAX) {
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set_field_back(before, A_REVERSE);
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} else if (ch <= MAX_FORM_COMMAND) {
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inactive_field(before);
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}
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*result = ch;
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for (n = 0; n < SIZEOF(commands); ++n) {
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if (commands[n].code == ch) {
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*result = commands[n].result;
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break;
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}
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}
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status = form_driver(form, *result);
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if (status == E_OK) {
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bool modified = TRUE;
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length = buffer_length(before);
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if (length < before_off)
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length = before_off;
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switch (*result) {
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case REQ_CLR_EOF:
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length = before_off;
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break;
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case REQ_CLR_EOL:
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if ((int) (before_row + 1) == (int) (before->rows))
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length = before_off;
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break;
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case REQ_CLR_FIELD:
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length = 0;
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break;
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case REQ_DEL_CHAR:
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if (length > before_off)
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--length;
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break;
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case REQ_DEL_PREV:
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if (length > 0) {
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if (before_col > 0) {
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--length;
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} else if (before_row > 0) {
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length -= (int) before->cols + before_col;
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}
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}
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break;
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case REQ_NEW_LINE:
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length += (int) before->cols;
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break;
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default:
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modified = (ch < MIN_FORM_COMMAND
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&& isprint(ch));
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break;
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}
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/*
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* If we do not force a re-validation, then field_buffer 0 will
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* be lagging by one character.
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*/
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if (modified && form_driver(form, REQ_VALIDATION) == E_OK && *result
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< MIN_FORM_COMMAND)
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++length;
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set_buffer_length(before, length);
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}
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if (current_field(form) != before)
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inactive_field(before);
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return status;
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}
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static void
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demo_forms(void)
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{
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FORM *form;
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int c;
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unsigned n = 0;
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const char *fname;
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/* describe the form */
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all_fields[n++] = make_label("Sample Form", 0, 15);
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fname = "Last Name";
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all_fields[n++] = make_label(fname, 2, 0);
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all_fields[n++] = make_field(3, 0, 1, 18);
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set_field_type(all_fields[n - 1], TYPE_ALPHA, 1);
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fname = "First Name";
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all_fields[n++] = make_label(fname, 2, 20);
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all_fields[n++] = make_field(3, 20, 1, 12);
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set_field_type(all_fields[n - 1], TYPE_ALPHA, 1);
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fname = "Middle Name";
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all_fields[n++] = make_label(fname, 2, 34);
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all_fields[n++] = make_field(3, 34, 1, 12);
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set_field_type(all_fields[n - 1], TYPE_ALPHA, 1);
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fname = "Comments";
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all_fields[n++] = make_label(fname, 5, 0);
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all_fields[n++] = make_field(6, 0, 4, 46);
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init_edit_field(all_fields[n - 1], empty);
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all_fields[n] = (FIELD *) 0;
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if ((form = new_form(all_fields)) != 0) {
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int finished = 0;
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post_form(form);
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while (!finished) {
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switch (my_edit_field(form, &c)) {
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case E_OK:
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break;
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case E_UNKNOWN_COMMAND:
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finished = my_form_driver(form, c);
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break;
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default:
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beep();
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break;
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}
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}
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erase_form(form);
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free_form(form);
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}
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for (c = 0; all_fields[c] != 0; c++) {
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free_edit_field(all_fields[c]);
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free_field(all_fields[c]);
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}
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noraw();
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nl();
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}
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int
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main(void)
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{
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setlocale(LC_ALL, "");
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initscr();
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cbreak();
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noecho();
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raw();
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nonl(); /* lets us read ^M's */
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intrflush(stdscr, FALSE);
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keypad(stdscr, TRUE);
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if (has_colors()) {
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start_color();
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init_pair(1, COLOR_WHITE, COLOR_BLUE);
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init_pair(2, COLOR_GREEN, COLOR_BLACK);
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init_pair(3, COLOR_CYAN, COLOR_BLACK);
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bkgd((chtype) COLOR_PAIR(1));
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refresh();
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}
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demo_forms();
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endwin();
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ExitProgram(EXIT_SUCCESS);
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}
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#else
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int
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main(void)
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{
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printf("This program requires the curses form library\n");
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ExitProgram(EXIT_FAILURE);
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}
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#endif
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