423 lines
9.2 KiB
C
423 lines
9.2 KiB
C
/* Copyright (C) 2018 Curtis McEnroe <june@causal.agency>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#define _XOPEN_SOURCE_EXTENDED
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#include <curses.h>
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#include <err.h>
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#include <locale.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sysexits.h>
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#include <wchar.h>
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#include <wctype.h>
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#include "chat.h"
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#undef uiFmt
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#define MIN(a, b) ((a) < (b) ? (a) : (b))
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#define MAX(a, b) ((a) > (b) ? (a) : (b))
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#define CTRL(c) ((c) & 037)
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#ifndef A_ITALIC
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#define A_ITALIC A_NORMAL
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#endif
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static void colorInit(void) {
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start_color();
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use_default_colors();
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if (COLORS >= 16) {
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for (short pair = 0; pair < 0x100; ++pair) {
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if (pair < 0x10) {
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init_pair(1 + pair, pair, -1);
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} else {
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init_pair(1 + pair, pair & 0x0F, (pair & 0xF0) >> 4);
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}
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}
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} else {
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for (short pair = 0; pair < 0100; ++pair) {
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if (pair < 010) {
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init_pair(1 + pair, pair, -1);
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} else {
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init_pair(1 + pair, pair & 007, (pair & 070) >> 3);
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}
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}
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}
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}
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static attr_t attr8(short pair) {
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if (COLORS >= 16 || pair < 0) return A_NORMAL;
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return (pair & 0x08) ? A_BOLD : A_NORMAL;
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}
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static short pair8(short pair) {
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if (COLORS >= 16 || pair < 0) return pair;
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return (pair & 0x70) >> 1 | (pair & 0x07);
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}
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static const int TOPIC_COLS = 512;
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static const int INPUT_COLS = 512;
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static const int LOG_LINES = 100;
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static int lastLine(void) {
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return LINES - 1;
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}
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static int lastCol(void) {
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return COLS - 1;
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}
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static int logHeight(void) {
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return LINES - 4;
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}
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static struct {
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WINDOW *topic;
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WINDOW *log;
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WINDOW *input;
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int scroll;
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size_t cursor;
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} ui;
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void uiInit(void) {
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setlocale(LC_CTYPE, "");
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initscr();
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cbreak();
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noecho();
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colorInit();
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ui.topic = newpad(2, TOPIC_COLS);
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mvwhline(ui.topic, 1, 0, ACS_HLINE, TOPIC_COLS);
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ui.log = newpad(LOG_LINES, COLS);
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wsetscrreg(ui.log, 0, LOG_LINES - 1);
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scrollok(ui.log, true);
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wmove(ui.log, LOG_LINES - logHeight() - 1, 0);
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ui.scroll = LOG_LINES;
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ui.input = newpad(2, INPUT_COLS);
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mvwhline(ui.input, 0, 0, ACS_HLINE, INPUT_COLS);
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wmove(ui.input, 1, 0);
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keypad(ui.input, true);
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nodelay(ui.input, true);
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}
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static void uiResize(void) {
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wresize(ui.log, LOG_LINES, COLS);
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wmove(ui.log, LOG_LINES - 1, COLS - 1);
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}
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void uiHide(void) {
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endwin();
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printf(
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"This program is AGPLv3 free software!\n"
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"The source is available at <" SOURCE_URL ">.\n"
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);
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}
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void uiDraw(void) {
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pnoutrefresh(
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ui.topic,
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0, 0,
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0, 0,
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1, lastCol()
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);
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pnoutrefresh(
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ui.log,
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ui.scroll - logHeight(), 0,
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2, 0,
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lastLine() - 2, lastCol()
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);
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int _, x;
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getyx(ui.input, _, x);
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pnoutrefresh(
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ui.input,
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0, MAX(0, x - lastCol() + 3),
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lastLine() - 1, 0,
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lastLine(), lastCol()
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);
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doupdate();
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}
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static void uiRedraw(void) {
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clearok(curscr, true);
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}
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static const short IRC_COLORS[16] = {
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8 + COLOR_WHITE, // white
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0 + COLOR_BLACK, // black
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0 + COLOR_BLUE, // blue
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0 + COLOR_GREEN, // green
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8 + COLOR_RED, // red
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0 + COLOR_RED, // brown
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0 + COLOR_MAGENTA, // magenta
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0 + COLOR_YELLOW, // orange
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8 + COLOR_YELLOW, // yellow
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8 + COLOR_GREEN, // light green
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0 + COLOR_CYAN, // cyan
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8 + COLOR_CYAN, // light cyan
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8 + COLOR_BLUE, // light blue
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8 + COLOR_MAGENTA, // pink
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8 + COLOR_BLACK, // gray
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0 + COLOR_WHITE, // light gray
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};
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static const wchar_t *parseColor(short *pair, const wchar_t *str) {
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short fg = 0;
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size_t fgLen = MIN(wcsspn(str, L"0123456789"), 2);
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if (!fgLen) { *pair = -1; return str; }
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for (size_t i = 0; i < fgLen; ++i) {
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fg = fg * 10 + (str[i] - L'0');
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}
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str = &str[fgLen];
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short bg = 0;
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size_t bgLen = 0;
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if (str[0] == L',') bgLen = MIN(wcsspn(&str[1], L"0123456789"), 2);
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for (size_t i = 0; i < bgLen; ++i) {
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bg = bg * 10 + (str[1 + i] - L'0');
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}
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if (bgLen) str = &str[1 + bgLen];
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if (*pair == -1) *pair = 0;
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*pair = (*pair & 0xF0) | IRC_COLORS[fg & 0x0F];
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if (bgLen) *pair = (*pair & 0x0F) | (IRC_COLORS[bg & 0x0F] << 4);
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return str;
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}
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static void wordWrap(WINDOW *win, const wchar_t *str) {
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size_t len = wcscspn(str, L" ");
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size_t width = 1;
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for (size_t i = 0; i < len; ++i) {
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if (iswprint(str[i])) width += wcwidth(str[i]);
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}
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int _, x, xMax;
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getyx(win, _, x);
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getmaxyx(win, _, xMax);
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if (width >= (size_t)(xMax - x)) {
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waddch(win, '\n');
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} else {
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waddch(win, ' ');
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}
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}
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enum {
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IRC_BOLD = 0x02,
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IRC_COLOR = 0x03,
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IRC_REVERSE = 0x16,
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IRC_RESET = 0x0F,
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IRC_ITALIC = 0x1D,
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IRC_UNDERLINE = 0x1F,
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};
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static const wchar_t IRC_CODES[] = {
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L' ',
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IRC_BOLD,
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IRC_COLOR,
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IRC_REVERSE,
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IRC_RESET,
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IRC_ITALIC,
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IRC_UNDERLINE,
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L'\0',
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};
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static void addIRC(WINDOW *win, const wchar_t *str) {
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attr_t attr = A_NORMAL;
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short pair = -1;
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for (;;) {
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size_t cc = wcscspn(str, IRC_CODES);
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wattr_set(win, attr | attr8(pair), 1 + pair8(pair), NULL);
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waddnwstr(win, str, cc);
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if (!str[cc]) break;
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str = &str[cc];
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switch (*str++) {
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break; case L' ': wordWrap(win, str);
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break; case IRC_BOLD: attr ^= A_BOLD;
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break; case IRC_ITALIC: attr ^= A_ITALIC;
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break; case IRC_UNDERLINE: attr ^= A_UNDERLINE;
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break; case IRC_REVERSE: attr ^= A_REVERSE;
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break; case IRC_COLOR: str = parseColor(&pair, str);
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break; case IRC_RESET: attr = A_NORMAL; pair = -1;
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}
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}
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}
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void uiTopic(const wchar_t *topic) {
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wmove(ui.topic, 0, 0);
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addIRC(ui.topic, topic);
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wclrtoeol(ui.topic);
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}
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void uiTopicStr(const char *topic) {
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size_t len = strlen(topic);
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wchar_t wcs[1 + len];
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len = mbstowcs(wcs, topic, 1 + len);
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if (len == (size_t)-1) err(EX_DATAERR, "mbstowcs");
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uiTopic(wcs);
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}
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void uiLog(const wchar_t *line) {
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waddch(ui.log, '\n');
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addIRC(ui.log, line);
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}
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void uiFmt(const wchar_t *format, ...) {
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wchar_t *buf;
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va_list ap;
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va_start(ap, format);
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vaswprintf(&buf, format, ap);
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va_end(ap);
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if (!buf) err(EX_OSERR, "vaswprintf");
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uiLog(buf);
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free(buf);
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}
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static void logUp(void) {
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if (ui.scroll == logHeight()) return;
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ui.scroll = MAX(ui.scroll - logHeight() / 2, logHeight());
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}
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static void logDown(void) {
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if (ui.scroll == LOG_LINES) return;
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ui.scroll = MIN(ui.scroll + logHeight() / 2, LOG_LINES);
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}
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enum { BUF_LEN = 512 };
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static struct {
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wchar_t buf[BUF_LEN];
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wchar_t *ptr;
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wchar_t *end;
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} line = { .ptr = line.buf, .end = line.buf };
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static void left(void) {
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if (line.ptr > line.buf) line.ptr--;
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}
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static void right(void) {
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if (line.ptr < line.end) line.ptr++;
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}
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static void home(void) {
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line.ptr = line.buf;
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}
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static void end(void) {
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line.ptr = line.end;
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}
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static void kill(void) {
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line.end = line.ptr;
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}
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static void insert(wchar_t ch) {
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if (line.end == &line.buf[BUF_LEN - 1]) return;
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if (line.ptr != line.end) {
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wmemmove(line.ptr + 1, line.ptr, line.end - line.ptr);
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}
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*line.ptr++ = ch;
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line.end++;
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}
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static void backspace(void) {
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if (line.ptr == line.buf) return;
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if (line.ptr != line.end) {
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wmemmove(line.ptr - 1, line.ptr, line.end - line.ptr);
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}
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line.ptr--;
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line.end--;
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}
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static void delete(void) {
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if (line.ptr == line.end) return;
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right();
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backspace();
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}
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static void enter(void) {
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if (line.end == line.buf) return;
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*line.end = L'\0';
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input(line.buf);
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line.ptr = line.buf;
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line.end = line.buf;
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}
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static void keyChar(wint_t ch) {
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switch (ch) {
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break; case CTRL('L'): uiRedraw();
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break; case CTRL('B'): left();
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break; case CTRL('F'): right();
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break; case CTRL('A'): home();
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break; case CTRL('E'): end();
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break; case CTRL('D'): delete();
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break; case CTRL('K'): kill();
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break; case '\b': backspace();
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break; case '\177': backspace();
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break; case '\n': enter();
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break; case CTRL('C'): insert(IRC_COLOR);
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break; case CTRL('N'): insert(IRC_RESET);
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break; case CTRL('O'): insert(IRC_BOLD);
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break; case CTRL('R'): insert(IRC_COLOR);
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break; case CTRL('T'): insert(IRC_ITALIC);
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break; case CTRL('U'): insert(IRC_UNDERLINE);
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break; case CTRL('V'): insert(IRC_REVERSE);
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break; default: if (iswprint(ch)) insert(ch);
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}
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}
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static void keyCode(wint_t ch) {
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switch (ch) {
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break; case KEY_RESIZE: uiResize();
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break; case KEY_PPAGE: logUp();
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break; case KEY_NPAGE: logDown();
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break; case KEY_LEFT: left();
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break; case KEY_RIGHT: right();
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break; case KEY_HOME: home();
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break; case KEY_END: end();
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break; case KEY_BACKSPACE: backspace();
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break; case KEY_DC: delete();
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break; case KEY_ENTER: enter();
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}
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}
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void uiRead(void) {
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int ret;
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wint_t ch;
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while (ERR != (ret = wget_wch(ui.input, &ch))) {
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if (ret == KEY_CODE_YES) {
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keyCode(ch);
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} else {
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keyChar(ch);
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}
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}
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wmove(ui.input, 1, 0);
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ch = *line.ptr;
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*line.ptr = L'\0';
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addIRC(ui.input, line.buf);
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*line.ptr = ch;
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int _, x;
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getyx(ui.input, _, x);
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*line.end = L'\0';
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addIRC(ui.input, line.ptr);
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wclrtoeol(ui.input);
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wmove(ui.input, 1, x);
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}
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