The start of a forms editor library. Currently implements text and
input fields. It reads a template file passed to init_forms(char *) and creates a curses based form editor. See the examples directory for a basic demo.
This commit is contained in:
Paul Richards
parent
e2855afcca
commit
0d18307afc
@ -10,9 +10,9 @@ SUBDIR=csu/${MACHINE}
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.endif
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# XXX MISSING: libmp libplot
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SUBDIR+= libc libcompat libcrypt libcurses libedit libf2c libkvm libmd \
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libmytinfo libncurses libresolv librpcsvc libskey libtelnet \
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libtermcap libutil liby
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SUBDIR+= libc libcompat libcrypt libcurses libedit libf2c libforms \
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libkvm libmd libmytinfo libncurses libresolv librpcsvc libskey \
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libtelnet libtermcap libutil liby
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.if !defined(WANT_MSUN)
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SUBDIR+= libm
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13
lib/libforms/Makefile
Normal file
13
lib/libforms/Makefile
Normal file
@ -0,0 +1,13 @@
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LIB = forms
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SRCS = forms.c yacc.c lex.c
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CLEANFILES += y.tab.h lex.c yacc.c
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CFLAGS = -I. -I${.CURDIR}
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beforeinstall:
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@(cd ${.CURDIR}; cmp -s forms.h ${DESTDIR}/usr/include/forms.h || \
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install -c -o ${BINOWN} -g ${BINGRP} -m 444 forms.h \
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${DESTDIR}/usr/include/forms.h;)
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.include <bsd.lib.mk>
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7
lib/libforms/examples/Makefile
Normal file
7
lib/libforms/examples/Makefile
Normal file
@ -0,0 +1,7 @@
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PROG = tform
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CFLAGS = -Wall -I. -I${.CURDIR}
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LDADD = -lforms -lncurses -ll
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DPADD = ${LIBFORMS} ${LIBNCURSES} ${LIBL}
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.include <bsd.prog.mk>
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6
lib/libforms/examples/example.frm
Normal file
6
lib/libforms/examples/example.frm
Normal file
@ -0,0 +1,6 @@
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Form template: 0 0 24 79
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Text 0 0 "This is non-editable text field"
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Input 1 2 4 2 3 3 2 2 8 "Prompt1:" 2 20 10 25 "First"
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Input 2 3 1 4 2 2 5 2 8 "Prompt2:" 5 20 10 25 "Second"
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Input 3 4 2 4 1 1 2 40 8 "Prompt3:" 2 50 10 25 "Third"
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Input 4 1 2 1 4 4 10 2 8 "Prompt4:" 10 20 10 25 "Fourth"
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18
lib/libforms/examples/tform.c
Normal file
18
lib/libforms/examples/tform.c
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@ -0,0 +1,18 @@
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#include <stdio.h>
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#include <stdlib.h>
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#include <ncurses.h>
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#include <dialog.h>
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#include <forms.h>
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extern struct form *form;
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void
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main()
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{
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printf("Testing forms code\n");
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if (init_forms("example.frm") == -1)
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exit(1);
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edit_form(form);
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}
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333
lib/libforms/forms.c
Normal file
333
lib/libforms/forms.c
Normal file
@ -0,0 +1,333 @@
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#include <string.h>
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#include <ncurses.h>
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#include <forms.h>
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extern FILE *yyin;
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struct form *form;
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unsigned int keymap[FORM_NO_KEYS] = {
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KEY_BTAB,
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9,
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KEY_UP,
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KEY_DOWN,
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'\r',
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'\033',
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KEY_HOME,
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KEY_END,
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KEY_LEFT,
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KEY_RIGHT,
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KEY_BACKSPACE,
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KEY_DC
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};
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int
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edit_field(WINDOW *window, struct field *field)
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{
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int len;
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int key = 0;
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int fpos, dispos, curpos;
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int i;
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int done = 0;
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len = strlen(field->entry.input.field);
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if (len < field->entry.input.field_width) {
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fpos = len;
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curpos = len;
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dispos = 0;
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} else {
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fpos = field->entry.input.field_width;
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curpos = field->entry.input.field_width;
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dispos = len - field->entry.input.field_width;
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};
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field->entry.input.field_attr = FORM_SELECTED_ATTR;
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do {
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wattrset(window, field->entry.input.field_attr);
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wmove(window, field->entry.input.y_field, field->entry.input.x_field);
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for (i=0; i < field->entry.input.field_width; i++)
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if (i < (len - dispos))
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waddch(window, field->entry.input.field[dispos+i]);
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else
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waddch(window, ' ');
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wmove(window, field->entry.input.y_field, field->entry.input.x_field + curpos);
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wrefresh(window);
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key = wgetch(window);
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if (key == keymap[FORM_LEFT] ||
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key == keymap[FORM_RIGHT] ||
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key == keymap[FORM_UP] ||
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key == keymap[FORM_DOWN] ||
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key == keymap[FORM_EXIT] ||
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key == '\n' ||
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key == '\r') {
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done = 1;
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} else if (key == keymap[FORM_FIELD_HOME]) {
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if (len < field->entry.input.field_width) {
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fpos = len;
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curpos = len;
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dispos = 0;
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} else {
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fpos = field->entry.input.field_width;
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curpos = field->entry.input.field_width;
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dispos = len - field->entry.input.field_width;
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};
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} else if (key == keymap[FORM_FIELD_END]) {
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if (len < field->entry.input.field_width) {
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dispos = 0;
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curpos = len - 1;
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} else {
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dispos = len - field->entry.input.field_width - 1;
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curpos = field->entry.input.field_width - 1;
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}
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fpos = len - 1;
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} else if (key == keymap[FORM_FIELD_LEFT]) {
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if ((!curpos) && (!dispos)) {
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beep();
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} else {
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if (--curpos < 0) {
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curpos = 0;
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if (--dispos < 0)
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dispos = 0;
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}
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if (--fpos < 0)
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fpos = 0;
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}
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} else if (key == keymap[FORM_FIELD_RIGHT]) {
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if ((curpos + dispos) == len) {
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beep();
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} else if ((curpos == (field->entry.input.field_width-1)) &&
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(dispos == (field->entry.input.max_field_width - field->entry.input.field_width -1))) {
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beep();
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} else {
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if (++curpos >= field->entry.input.field_width) {
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curpos = field->entry.input.field_width - 1;
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dispos++;
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}
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if (dispos >= len)
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dispos = len - 1;
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if (++fpos >= len) {
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fpos = len;
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}
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}
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} else if (key == keymap[FORM_FIELD_BACKSPACE]) {
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if ((!curpos) && (!dispos)) {
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beep();
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} else if (fpos > 0) {
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memmove(&field->entry.input.field[fpos-1], &field->entry.input.field[fpos], len - fpos);
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len--;
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fpos--;
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if (curpos > 0)
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--curpos;
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if (!curpos)
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--dispos;
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if (dispos < 0)
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dispos = 0;
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} else
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beep();
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} else {
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if (len < field->entry.input.max_field_width - 1) {
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memmove(&field->entry.input.field[fpos+1], &field->entry.input.field[fpos], len - fpos);
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field->entry.input.field[fpos] = key;
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len++;
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fpos++;
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if (++curpos == field->entry.input.field_width) {
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--curpos;
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dispos++;
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}
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if (len == (field->entry.input.max_field_width - 1)) {
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dispos = (field->entry.input.max_field_width - field->entry.input.field_width - 1);
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}
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} else
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beep();
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}
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} while (!done);
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field->entry.input.field_attr = FORM_DEFAULT_ATTR;
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wattrset(window, field->entry.input.field_attr);
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wmove(window, field->entry.input.y_field, field->entry.input.x_field);
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for (i=0; i < field->entry.input.field_width; i++)
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if (i < (len - dispos))
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waddch(window, field->entry.input.field[dispos+i]);
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else
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waddch(window, ' ');
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wmove(window, field->entry.input.y_field, field->entry.input.x_field + curpos);
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wrefresh(window);
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field->entry.input.field[len] = 0;
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delwin(window);
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refresh();
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return (key);
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}
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int
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init_forms(char *template)
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{
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FILE *fd;
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struct field *link, *next;
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/* Intialise lex input */
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if (!(fd = fopen(template, "r"))) {
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fprintf(stderr, "Couldn't open template file %s\n", template);
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return(-1);
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}
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if (!initscr()) {
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fprintf(stderr, "Failed to initialise curses\n");
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return(-1);
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}
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cbreak();
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noecho();
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nonl();
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yyin = fd;
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yyparse();
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/* Setup up links to/from fields */
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for (next = form->fields; next; next = next->link) {
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/* Ignore the link values of text fields */
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if (next->type == FORM_FTYPE_TEXT)
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continue;
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link = find_link((int)next->next);
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if (!link) {
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fprintf(stderr, "Bad link (next) from %d to %d\n",
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next->field_id, (int)next->next);
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next->next = 0;
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} else
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next->next = link;
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link = find_link((int)next->up);
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if (!link) {
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fprintf(stderr, "Bad link (up) from %d to %d\n",
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next->field_id, (int)next->up);
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next->up = 0;
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} else
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next->up = link;
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link = find_link((int)next->down);
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if (!link) {
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fprintf(stderr, "Bad link (down) from %d to %d\n",
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next->field_id, (int)next->down);
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next->down = 0;
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} else
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next->down = link;
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link = find_link((int)next->left);
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if (!link) {
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fprintf(stderr, "Bad link (left) from %d to %d\n",
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next->field_id, (int)next->left);
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next->left = 0;
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} else
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next->left = link;
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link = find_link((int)next->right);
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if (!link) {
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fprintf(stderr, "Bad link (right) from %d to %d\n",
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next->field_id, (int)next->right);
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next->right = 0;
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} else
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next->right = link;
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}
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}
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struct field *
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find_link(int id)
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{
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struct field *next;
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for (next=form->fields; next; next=next->link)
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/* You can't move into a text field */
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if ((id == next->field_id) && (next->type != FORM_FTYPE_TEXT))
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return (next);
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return(0);
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}
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void
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edit_form(struct form *form)
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{
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WINDOW *window;
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struct field *cur_field;
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int key;
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window = newwin(form->height, form->width, form->y, form->x);
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keypad(window, TRUE);
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refresh_form(window, form);
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cur_field = form->fields;
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do {
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/* Just skip over text fields */
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if (cur_field->type == FORM_FTYPE_TEXT) {
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cur_field = cur_field->link;
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continue;
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}
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switch (cur_field->type) {
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case FORM_FTYPE_INPUT:
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key = edit_field(window, cur_field);
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break;
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case FORM_FTYPE_MENU:
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case FORM_FTYPE_BUTTON:
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case FORM_FTYPE_TEXT: /* Should never happen */
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default:
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break;
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}
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if (key == keymap[FORM_UP]) {
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if (cur_field->up)
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cur_field = cur_field->up;
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else
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beep();
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} else if (key == keymap[FORM_DOWN]) {
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if (cur_field->down)
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cur_field = cur_field->down;
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else
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beep();
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} else if (key == keymap[FORM_LEFT]) {
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if (cur_field->left)
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cur_field = cur_field->left;
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else
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beep();
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} else if (key == keymap[FORM_RIGHT]) {
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if (cur_field->right)
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cur_field = cur_field->right;
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else
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beep();
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} else if (key == keymap[FORM_NEXT]) {
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if (cur_field->next)
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cur_field = cur_field->next;
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else
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cur_field = form->fields;
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} else
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beep();
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} while (key != keymap[FORM_EXIT]);
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}
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void
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refresh_form(WINDOW *window, struct form *form)
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{
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struct field *cur_field;
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cur_field = form->fields;
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while (cur_field) {
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switch (cur_field->type) {
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case FORM_FTYPE_INPUT:
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wattrset(window, cur_field->entry.input.prompt_attr);
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mvwprintw(window, cur_field->entry.input.y_prompt,
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cur_field->entry.input.x_prompt,
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"%s", cur_field->entry.input.prompt);
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wattrset(window, cur_field->entry.input.field_attr);
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mvwprintw(window, cur_field->entry.input.y_field,
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cur_field->entry.input.x_field,
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"%s", cur_field->entry.input.field);
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break;
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case FORM_FTYPE_TEXT:
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wattrset(window, cur_field->entry.text.attr);
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mvwprintw(window, cur_field->entry.text.y,
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cur_field->entry.text.x,
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"%s", cur_field->entry.text.text);
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break;
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default:
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break;
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}
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cur_field = cur_field->link;
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}
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wrefresh(window);
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}
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81
lib/libforms/forms.h
Normal file
81
lib/libforms/forms.h
Normal file
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#define FORM_NO_KEYS 12
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#define FORM_LEFT 0
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#define FORM_RIGHT 1
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#define FORM_UP 2
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#define FORM_DOWN 3
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#define FORM_NEXT 4
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#define FORM_EXIT 5
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#define FORM_FIELD_HOME 6
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#define FORM_FIELD_END 7
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#define FORM_FIELD_LEFT 8
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#define FORM_FIELD_RIGHT 9
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#define FORM_FIELD_BACKSPACE 10
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#define FORM_FIELD_DELETE 11
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/* Attribute values */
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#define FORM_DEFAULT_ATTR 0
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#define FORM_SELECTED_ATTR 0
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/* Field types */
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#define FORM_FTYPE_INPUT 0
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#define FORM_FTYPE_MENU 1
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#define FORM_FTYPE_BUTTON 2
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#define FORM_FTYPE_TEXT 3
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#define MAX_FIELD_SIZE 80
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struct form {
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int x;
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int y;
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int height;
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int width;
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struct field *fields;
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};
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struct input_field {
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int y_prompt;
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int x_prompt;
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int prompt_width;
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int prompt_attr;
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char *prompt;
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int y_field;
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int x_field;
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int field_width;
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int max_field_width;
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int field_attr;
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char *field;
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};
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struct text_field {
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int y;
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int x;
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int attr;
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char *text;
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};
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struct field {
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int field_id;
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int type;
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union {
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struct input_field input;
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struct text_field text;
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#ifdef notyet
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struct menu_field menu
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struct button_field button;
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#endif
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} entry;
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struct field *link;
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struct field *next;
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struct field *up;
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struct field *down;
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struct field *left;
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struct field *right;
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};
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extern unsigned int keymap[FORM_NO_KEYS];
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int init_forms();
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int edit_line(WINDOW *window, struct field *);
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void edit_form(struct form *);
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void refresh_form(WINDOW *, struct form *);
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struct field *find_link(int);
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19
lib/libforms/lex.l
Normal file
19
lib/libforms/lex.l
Normal file
@ -0,0 +1,19 @@
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%{
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#include "y.tab.h"
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%}
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%%
|
||||
"Form template:" { yylval.ival = FORM; return FORM; }
|
||||
Input { yylval.ival = INPUT; return INPUT; }
|
||||
Text { yylval.ival = TEXT; return TEXT; }
|
||||
|
||||
[0-9]+ { yylval.ival = atoi(yytext); return NUMBER; }
|
||||
\"[^"]* {
|
||||
if (yytext[yyleng-1] == '\\') {
|
||||
yymore();
|
||||
} else {
|
||||
input();
|
||||
yylval.sval = yytext+1;
|
||||
return STRING;
|
||||
}
|
||||
}
|
||||
149
lib/libforms/yacc.y
Normal file
149
lib/libforms/yacc.y
Normal file
@ -0,0 +1,149 @@
|
||||
%{
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
#include <ncurses.h>
|
||||
#include <forms.h>
|
||||
|
||||
extern struct form *form;
|
||||
|
||||
struct field *cur_field;
|
||||
int id,next, up, down, left, right;
|
||||
%}
|
||||
|
||||
%start file
|
||||
|
||||
%union {
|
||||
int ival;
|
||||
char *sval;
|
||||
}
|
||||
|
||||
%token <sval> STRING
|
||||
%token <ival> NUMBER
|
||||
%token <ival> INPUT
|
||||
%token <ival> TEXT
|
||||
%token <ival> FORM
|
||||
|
||||
%type <sval> String
|
||||
|
||||
%%
|
||||
|
||||
file : /* Empty */
|
||||
| file form
|
||||
| file fields
|
||||
| error
|
||||
;
|
||||
|
||||
form : FORM NUMBER NUMBER NUMBER NUMBER
|
||||
{
|
||||
form = (struct form *) malloc(sizeof(struct form));
|
||||
if (!form)
|
||||
return(-1);
|
||||
form->x = $2;
|
||||
form->y = $3;
|
||||
form->height = $4;
|
||||
form->width = $5;
|
||||
form->fields = 0;
|
||||
}
|
||||
;
|
||||
|
||||
fields : input
|
||||
| text
|
||||
;
|
||||
|
||||
input : INPUT NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER String NUMBER NUMBER NUMBER NUMBER String
|
||||
{
|
||||
if (alloc_field() == -1)
|
||||
return(-1);
|
||||
cur_field->field_id = $2;
|
||||
/*
|
||||
* These will hold addresses but store
|
||||
* the field id's in them temporarily
|
||||
*/
|
||||
cur_field->next = (struct field *) $3;
|
||||
cur_field->up = (struct field *) $4;
|
||||
cur_field->down = (struct field *) $5;
|
||||
cur_field->left = (struct field *) $6;
|
||||
cur_field->right = (struct field *) $7;
|
||||
cur_field->type = FORM_FTYPE_INPUT;
|
||||
cur_field->entry.input.y_prompt = $8;
|
||||
cur_field->entry.input.x_prompt = $9;
|
||||
cur_field->entry.input.prompt_width = $10;
|
||||
cur_field->entry.input.prompt_attr = FORM_DEFAULT_ATTR;
|
||||
cur_field->entry.input.prompt = (char *) malloc($10+1);
|
||||
if (!cur_field->entry.input.prompt)
|
||||
return(-1);
|
||||
strncpy(cur_field->entry.input.prompt, $11, $10);
|
||||
cur_field->entry.input.prompt[$10] = 0;
|
||||
cur_field->entry.input.y_field = $12;
|
||||
cur_field->entry.input.x_field = $13;
|
||||
cur_field->entry.input.field_width = $14;
|
||||
cur_field->entry.input.max_field_width = $15;
|
||||
cur_field->entry.input.field = (char *) malloc(strlen($16));
|
||||
cur_field->entry.input.field_attr = FORM_DEFAULT_ATTR;
|
||||
if (!cur_field->entry.input.field)
|
||||
return(-1);
|
||||
strcpy(cur_field->entry.input.field, $16);
|
||||
}
|
||||
;
|
||||
|
||||
text : TEXT NUMBER NUMBER String
|
||||
{
|
||||
if (alloc_field() == -1)
|
||||
return(-1);
|
||||
cur_field->field_id = 0;
|
||||
cur_field->type = FORM_FTYPE_TEXT;
|
||||
cur_field->entry.text.y = $2;
|
||||
cur_field->entry.text.x = $3;
|
||||
cur_field->entry.text.attr = FORM_DEFAULT_ATTR;
|
||||
cur_field->entry.text.text = (char *) malloc(strlen($4));
|
||||
if (!cur_field->entry.text.text)
|
||||
return (-1);
|
||||
strcpy(cur_field->entry.text.text, $4);
|
||||
}
|
||||
;
|
||||
|
||||
String : STRING
|
||||
{
|
||||
char *t, *old, *new;
|
||||
|
||||
t = strdup($1);
|
||||
free($1);
|
||||
/*
|
||||
* Deal with any escaped characters,
|
||||
* only works for " and \ really.
|
||||
*/
|
||||
for (old=t, new=t; *old; old++, new++) {
|
||||
if (*old == '\\')
|
||||
old++;
|
||||
*new = *old;
|
||||
}
|
||||
*new = '\0';
|
||||
$$ = t;
|
||||
}
|
||||
|
||||
%%
|
||||
void
|
||||
yyerror(char *s)
|
||||
{
|
||||
printf("%s\n", s);
|
||||
exit(1);
|
||||
}
|
||||
|
||||
int
|
||||
alloc_field()
|
||||
{
|
||||
if (!form->fields) {
|
||||
form->fields = (struct field *) malloc(sizeof(struct field));
|
||||
if (!form->fields)
|
||||
return(-1);
|
||||
cur_field = form->fields;
|
||||
} else {
|
||||
cur_field->link = (struct field *) malloc(sizeof(struct field));
|
||||
if (!cur_field->link)
|
||||
return(-1);
|
||||
cur_field = cur_field->link;
|
||||
}
|
||||
|
||||
return(0);
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user