catboy/ui.c

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/* Copyright (C) 2018 Curtis McEnroe <june@causal.agency>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#define _XOPEN_SOURCE_EXTENDED
#include <curses.h>
#include <err.h>
#include <locale.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sysexits.h>
#include <wchar.h>
#include <wctype.h>
#include "chat.h"
#ifndef A_ITALIC
#define A_ITALIC A_NORMAL
#endif
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#define MAX(a, b) ((a) > (b) ? (a) : (b))
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#define MIN(a, b) ((a) < (b) ? (a) : (b))
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static const int TOPIC_COLS = 512;
static const int INPUT_COLS = 512;
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static const int LOG_LINES = 100;
static struct {
WINDOW *topic;
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WINDOW *log;
WINDOW *input;
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size_t cursor;
} ui;
void uiInit(void) {
setlocale(LC_CTYPE, "");
initscr();
cbreak();
noecho();
keypad(stdscr, true);
start_color();
use_default_colors();
for (short pair = 0; pair < 077; ++pair) {
if (pair < 010) {
init_pair(1 + pair, pair, -1);
} else {
init_pair(1 + pair, pair & 007, (pair & 070) >> 3);
}
}
ui.topic = newpad(2, TOPIC_COLS);
mvwhline(ui.topic, 1, 0, ACS_HLINE, TOPIC_COLS);
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ui.log = newpad(LOG_LINES, COLS);
wsetscrreg(ui.log, 0, LOG_LINES - 1);
scrollok(ui.log, true);
wmove(ui.log, LOG_LINES - (LINES - 4) - 1, 0);
ui.input = newpad(2, INPUT_COLS);
mvwhline(ui.input, 0, 0, ACS_HLINE, INPUT_COLS);
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wmove(ui.input, 1, ui.cursor);
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nodelay(ui.input, true);
}
static void uiResize(void) {
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wresize(ui.log, LOG_LINES, COLS);
wmove(ui.log, LOG_LINES - 1, COLS - 1);
}
void uiHide(void) {
endwin();
}
void uiDraw(void) {
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int lastCol = COLS - 1;
int lastLine = LINES - 1;
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pnoutrefresh(
ui.topic,
0, 0,
0, 0,
1, lastCol
);
pnoutrefresh(
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ui.log,
LOG_LINES - (LINES - 4), 0,
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2, 0,
lastLine - 2, lastCol
);
pnoutrefresh(
ui.input,
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0, MAX(0, ui.cursor - lastCol),
lastLine - 1, 0,
lastLine, lastCol
);
doupdate();
}
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static const struct AttrColor {
attr_t attr;
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short pair;
} MIRC_COLORS[16] = {
{ A_BOLD, COLOR_WHITE }, // white
{ A_NORMAL, COLOR_BLACK }, // black
{ A_NORMAL, COLOR_BLUE }, // blue
{ A_NORMAL, COLOR_GREEN }, // green
{ A_BOLD, COLOR_RED }, // red
{ A_NORMAL, COLOR_RED }, // "brown"
{ A_NORMAL, COLOR_MAGENTA }, // magenta
{ A_NORMAL, COLOR_YELLOW }, // "orange"
{ A_BOLD, COLOR_YELLOW }, // yellow
{ A_BOLD, COLOR_GREEN }, // light green
{ A_NORMAL, COLOR_CYAN }, // cyan
{ A_BOLD, COLOR_CYAN }, // light cyan
{ A_BOLD, COLOR_BLUE }, // light blue
{ A_BOLD, COLOR_MAGENTA }, // "pink"
{ A_BOLD, COLOR_BLACK }, // grey
{ A_NORMAL, COLOR_WHITE }, // light grey
};
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static const char *parseColor(struct AttrColor *color, const char *str) {
short fg = 0;
size_t fgLen = MIN(strspn(str, "0123456789"), 2);
if (!fgLen) {
color->attr = A_NORMAL;
color->pair = -1;
return str;
}
for (size_t i = 0; i < fgLen; ++i) {
fg *= 10;
fg += str[i] - '0';
}
str = &str[fgLen];
short bg = 0;
size_t bgLen = 0;
if (str[0] == ',') {
bgLen = MIN(strspn(&str[1], "0123456789"), 2);
}
for (size_t i = 0; i < bgLen; ++i) {
bg *= 10;
bg += str[1 + i] - '0';
}
if (bgLen) str = &str[1 + bgLen];
if (color->pair == -1) color->pair = 0;
color->attr = MIRC_COLORS[fg].attr;
color->pair = (color->pair & 070) | MIRC_COLORS[fg].pair;
if (bgLen) {
color->pair = (color->pair & 007) | (MIRC_COLORS[bg].pair << 3);
}
return str;
}
static void uiAdd(WINDOW *win, const char *str) {
attr_t attr = A_NORMAL;
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struct AttrColor color = { A_NORMAL, -1 };
for (;;) {
size_t cc = strcspn(str, "\2\3\35\37");
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wattr_set(win, attr | color.attr, 1 + color.pair, NULL);
waddnstr(win, str, cc);
if (!str[cc]) break;
str = &str[cc];
switch (*str++) {
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break; case '\2': attr ^= A_BOLD;
break; case '\3': str = parseColor(&color, str);
break; case '\35': attr ^= A_ITALIC;
break; case '\37': attr ^= A_UNDERLINE;
}
}
}
void uiTopic(const char *topic) {
wmove(ui.topic, 0, 0);
wclrtoeol(ui.topic);
uiAdd(ui.topic, topic);
}
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void uiLog(const char *line) {
waddch(ui.log, '\n');
uiAdd(ui.log, line);
}
void uiFmt(const char *format, ...) {
char *buf;
va_list ap;
va_start(ap, format);
vasprintf(&buf, format, ap);
va_end(ap);
if (!buf) err(EX_OSERR, "vasprintf");
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uiLog(buf);
free(buf);
}
void uiRead(void) {
static wchar_t buf[512];
static size_t len;
wint_t ch;
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while (wget_wch(ui.input, &ch) != ERR) {
switch (ch) {
break; case KEY_RESIZE: uiResize();
break; case '\b': case '\177': {
if (len) len--;
}
break; case '\n': {
if (!len) break;
buf[len] = '\0';
input(buf);
len = 0;
}
break; default: {
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// TODO: Check overflow
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if (iswprint(ch)) buf[len++] = ch;
}
}
}
wmove(ui.input, 1, 0);
waddnwstr(ui.input, buf, len);
wclrtoeol(ui.input);
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ui.cursor = len;
}