catboy/ui.c

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/* Copyright (C) 2018, 2019 C. 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 <stdarg.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <sysexits.h>
#include <wchar.h>
#include <wctype.h>
#ifndef A_ITALIC
#define A_ITALIC A_UNDERLINE
#endif
#include "chat.h"
#undef uiFmt
#define CTRL(ch) ((ch) & 037)
enum { Esc = L'\33', Del = L'\177' };
static const int LogLines = 512;
static int lastLine(void) {
return LINES - 1;
}
static int lastCol(void) {
return COLS - 1;
}
static int logHeight(void) {
return LINES - 2;
}
struct Window {
struct Tag tag;
WINDOW *log;
bool hot;
bool mark;
int scroll;
uint unread;
struct Window *prev;
struct Window *next;
};
static struct {
struct Window *active;
struct Window *head;
struct Window *tail;
struct Window *tag[TagsLen];
} windows;
static void windowAppend(struct Window *win) {
if (windows.tail) windows.tail->next = win;
win->prev = windows.tail;
win->next = NULL;
windows.tail = win;
if (!windows.head) windows.head = win;
windows.tag[win->tag.id] = win;
}
static void windowRemove(struct Window *win) {
windows.tag[win->tag.id] = NULL;
if (win->prev) win->prev->next = win->next;
if (win->next) win->next->prev = win->prev;
if (windows.head == win) windows.head = win->next;
if (windows.tail == win) windows.tail = win->prev;
}
static struct Window *windowFor(struct Tag tag) {
struct Window *win = windows.tag[tag.id];
if (win) return win;
win = calloc(1, sizeof(*win));
if (!win) err(EX_OSERR, "calloc");
win->tag = tag;
win->mark = true;
win->scroll = LogLines;
win->log = newpad(LogLines, COLS);
wsetscrreg(win->log, 0, LogLines - 1);
scrollok(win->log, true);
wmove(win->log, LogLines - 1, 0);
windowAppend(win);
return win;
}
static void windowResize(struct Window *win) {
wresize(win->log, LogLines, COLS);
wmove(win->log, LogLines - 1, lastCol());
}
static void windowMark(struct Window *win) {
win->mark = true;
}
static void windowUnmark(struct Window *win) {
win->mark = false;
win->unread = 0;
win->hot = false;
}
static void windowShow(struct Window *win) {
if (windows.active) windowMark(windows.active);
if (win) {
touchwin(win->log);
windowUnmark(win);
}
windows.active = win;
}
static void windowClose(struct Window *win) {
if (windows.active == win) windowShow(win->next ? win->next : win->prev);
windowRemove(win);
delwin(win->log);
free(win);
}
static void windowScroll(struct Window *win, int lines) {
if (lines < 0) {
if (win->scroll == logHeight()) return;
if (win->scroll == LogLines) windowMark(win);
win->scroll = MAX(win->scroll + lines, logHeight());
} else {
if (win->scroll == LogLines) return;
win->scroll = MIN(win->scroll + lines, LogLines);
if (win->scroll == LogLines) windowUnmark(win);
}
}
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static void colorInit(void) {
start_color();
use_default_colors();
if (COLORS < 16) {
for (short pair = 0; pair < 0100; ++pair) {
if (pair < 010) {
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init_pair(1 + pair, pair, -1);
} else {
init_pair(1 + pair, pair & 007, (pair & 070) >> 3);
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}
}
} else {
for (short pair = 0; pair < 0x100; ++pair) {
if (pair < 0x10) {
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init_pair(1 + pair, pair, -1);
} else {
init_pair(1 + pair, pair & 0x0F, (pair & 0xF0) >> 4);
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}
}
}
}
static attr_t colorAttr(short color) {
if (color < 0) return A_NORMAL;
if (COLORS < 16 && (color & 0x08)) return A_BOLD;
return A_NORMAL;
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}
static short colorPair(short color) {
if (color < 0) return 0;
if (COLORS < 16) return 1 + ((color & 0x70) >> 1 | (color & 0x07));
return 1 + color;
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}
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static struct {
bool hide;
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WINDOW *status;
WINDOW *input;
} ui;
void uiInit(void) {
initscr();
cbreak();
noecho();
termInit();
colorInit();
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ui.status = newwin(1, COLS, 0, 0);
ui.input = newpad(1, 512);
keypad(ui.input, true);
nodelay(ui.input, true);
uiShow();
}
static void uiResize(void) {
wresize(ui.status, 1, COLS);
for (struct Window *win = windows.head; win; win = win->next) {
windowResize(win);
}
}
void uiShow(void) {
ui.hide = false;
termMode(TermFocus, true);
uiDraw();
}
void uiHide(void) {
ui.hide = true;
termMode(TermFocus, false);
endwin();
}
void uiExit(int status) {
uiHide();
printf(
"This program is AGPLv3 Free Software!\n"
"Code is available from <" SOURCE_URL ">.\n"
);
exit(status);
}
static int _;
void uiDraw(void) {
if (ui.hide) return;
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wnoutrefresh(ui.status);
if (windows.active) {
pnoutrefresh(
windows.active->log,
windows.active->scroll - logHeight(), 0,
1, 0,
lastLine() - 1, lastCol()
);
}
int x;
getyx(ui.input, _, x);
pnoutrefresh(
ui.input,
0, MAX(0, x - lastCol() + 3),
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lastLine(), 0,
lastLine(), lastCol()
);
doupdate();
}
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static const short Colors[] = {
[IRCWhite] = 8 + COLOR_WHITE,
[IRCBlack] = 0 + COLOR_BLACK,
[IRCBlue] = 0 + COLOR_BLUE,
[IRCGreen] = 0 + COLOR_GREEN,
[IRCRed] = 8 + COLOR_RED,
[IRCBrown] = 0 + COLOR_RED,
[IRCMagenta] = 0 + COLOR_MAGENTA,
[IRCOrange] = 0 + COLOR_YELLOW,
[IRCYellow] = 8 + COLOR_YELLOW,
[IRCLightGreen] = 8 + COLOR_GREEN,
[IRCCyan] = 0 + COLOR_CYAN,
[IRCLightCyan] = 8 + COLOR_CYAN,
[IRCLightBlue] = 8 + COLOR_BLUE,
[IRCPink] = 8 + COLOR_MAGENTA,
[IRCGray] = 8 + COLOR_BLACK,
[IRCLightGray] = 0 + COLOR_WHITE,
};
static void addFormat(WINDOW *win, const struct Format *format) {
attr_t attr = A_NORMAL;
if (format->bold) attr |= A_BOLD;
if (format->italic) attr |= A_ITALIC;
if (format->underline) attr |= A_UNDERLINE;
if (format->reverse) attr |= A_REVERSE;
short color = -1;
if (format->fg != IRCDefault) color = Colors[format->fg];
if (format->bg != IRCDefault) color |= Colors[format->bg] << 4;
wattr_set(win, attr | colorAttr(color), colorPair(color), NULL);
waddnwstr(win, format->str, format->len);
}
static int printWidth(const wchar_t *str, size_t len) {
int width = 0;
for (size_t i = 0; i < len; ++i) {
if (iswprint(str[i])) width += wcwidth(str[i]);
}
return width;
}
static int addWrap(WINDOW *win, const wchar_t *str) {
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int lines = 0;
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struct Format format = { .str = str };
formatReset(&format);
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while (formatParse(&format, NULL)) {
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size_t word = 1 + wcscspn(&format.str[1], L" ");
if (word < format.len) format.len = word;
int x, xMax;
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getyx(win, _, x);
getmaxyx(win, _, xMax);
if (xMax - x - 1 < printWidth(format.str, word)) {
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if (format.str[0] == L' ') {
format.str++;
format.len--;
}
waddch(win, '\n');
lines++;
}
addFormat(win, &format);
}
return lines;
}
static void title(const struct Window *win) {
int unread;
char *str;
int len = asprintf(&str, "%s%n (%u)", win->tag.name, &unread, win->unread);
if (len < 0) err(EX_OSERR, "asprintf");
if (!win->unread) str[unread] = '\0';
termTitle(str);
free(str);
}
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static void uiStatus(void) {
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wmove(ui.status, 0, 0);
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int num = 0;
for (const struct Window *win = windows.head; win; win = win->next, ++num) {
if (!win->unread && windows.active != win) continue;
if (windows.active == win) title(win);
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int unread;
wchar_t *str;
int len = aswprintf(
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&str, L"%c %d %s %n(\3%02d%u\3) ",
(windows.active == win ? IRCReverse : IRCReset),
num, win->tag.name,
&unread, (win->hot ? IRCYellow : IRCDefault), win->unread
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);
if (len < 0) err(EX_OSERR, "aswprintf");
if (!win->unread) str[unread] = L'\0';
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addWrap(ui.status, str);
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free(str);
}
// TODO: Put active window's topic in the rest of the status area.
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wclrtoeol(ui.status);
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}
void uiShowTag(struct Tag tag) {
windowShow(windowFor(tag));
uiStatus();
uiPrompt(false);
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}
void uiShowNum(int num) {
struct Window *win = NULL;
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if (num < 0) {
for (win = windows.tail; win; win = win->prev) {
if (!++num) break;
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}
} else {
for (win = windows.head; win; win = win->next) {
if (!num--) break;
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}
}
if (win) windowShow(win);
uiStatus();
uiPrompt(false);
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}
void uiCloseTag(struct Tag tag) {
windowClose(windowFor(tag));
uiStatus();
uiPrompt(false);
}
static void notify(struct Tag tag, const wchar_t *str) {
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beep();
if (!self.notify) return;
size_t len = 0;
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char buf[256];
struct Format format = { .str = str };
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formatReset(&format);
while (formatParse(&format, NULL)) {
int n = snprintf(
&buf[len], sizeof(buf) - len,
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"%.*ls", (int)format.len, format.str
);
if (n < 0) err(EX_OSERR, "snprintf");
len += n;
if (len >= sizeof(buf)) break;
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}
eventPipe((const char *[]) { "notify-send", tag.name, buf, NULL });
}
void uiLog(struct Tag tag, enum UIHeat heat, const wchar_t *str) {
struct Window *win = windowFor(tag);
int lines = 1;
waddch(win->log, '\n');
if (win->mark && heat > UICold) {
if (!win->unread++) {
lines++;
waddch(win->log, '\n');
}
if (heat > UIWarm) {
win->hot = true;
notify(tag, str);
}
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uiStatus();
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}
lines += addWrap(win->log, str);
if (win->scroll != LogLines) win->scroll -= lines;
}
void uiFmt(struct Tag tag, enum UIHeat heat, const wchar_t *format, ...) {
wchar_t *str;
va_list ap;
va_start(ap, format);
vaswprintf(&str, format, ap);
va_end(ap);
if (!str) err(EX_OSERR, "vaswprintf");
uiLog(tag, heat, str);
free(str);
}
static void keyCode(wchar_t code) {
if (code == KEY_RESIZE) uiResize();
struct Window *win = windows.active;
if (!win) return;
switch (code) {
break; case KEY_SLEFT: windowScroll(win, -1);
break; case KEY_SRIGHT: windowScroll(win, +1);
break; case KEY_PPAGE: windowScroll(win, -logHeight() / 2);
break; case KEY_NPAGE: windowScroll(win, +logHeight() / 2);
break; case KEY_LEFT: edit(win->tag, EditLeft, 0);
break; case KEY_RIGHT: edit(win->tag, EditRight, 0);
break; case KEY_HOME: edit(win->tag, EditHome, 0);
break; case KEY_END: edit(win->tag, EditEnd, 0);
break; case KEY_DC: edit(win->tag, EditDelete, 0);
break; case KEY_BACKSPACE: edit(win->tag, EditBackspace, 0);
break; case KEY_ENTER: edit(win->tag, EditEnter, 0);
break; default: return;
}
uiStatus();
}
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static void keyChar(wchar_t ch) {
struct Window *win = windows.active;
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if (ch < 0200) {
enum TermEvent event = termEvent((char)ch);
switch (event) {
break; case TermFocusIn: if (win) windowUnmark(win);
break; case TermFocusOut: if (win) windowMark(win);
break; default: {}
}
if (event) {
uiStatus();
return;
}
}
if (ch == Del) ch = L'\b';
static bool meta;
if (ch == Esc) {
meta = true;
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return;
}
if (meta) {
meta = false;
if (ch >= L'0' && ch <= L'9') uiShowNum(ch - L'0');
if (!win) return;
switch (ch) {
break; case L'b': edit(win->tag, EditBackWord, 0);
break; case L'f': edit(win->tag, EditForeWord, 0);
break; case L'\b': edit(win->tag, EditKillBackWord, 0);
break; case L'd': edit(win->tag, EditKillForeWord, 0);
break; case L'm': uiLog(win->tag, UICold, L"");
}
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return;
}
if (ch == CTRL(L'L')) clearok(curscr, true);
if (!win) return;
switch (ch) {
break; case CTRL(L'A'): edit(win->tag, EditHome, 0);
break; case CTRL(L'B'): edit(win->tag, EditLeft, 0);
break; case CTRL(L'D'): edit(win->tag, EditDelete, 0);
break; case CTRL(L'E'): edit(win->tag, EditEnd, 0);
break; case CTRL(L'F'): edit(win->tag, EditRight, 0);
break; case CTRL(L'K'): edit(win->tag, EditKillLine, 0);
break; case CTRL(L'W'): edit(win->tag, EditKillBackWord, 0);
break; case CTRL(L'C'): edit(win->tag, EditInsert, IRCColor);
break; case CTRL(L'N'): edit(win->tag, EditInsert, IRCReset);
break; case CTRL(L'O'): edit(win->tag, EditInsert, IRCBold);
break; case CTRL(L'R'): edit(win->tag, EditInsert, IRCColor);
break; case CTRL(L'T'): edit(win->tag, EditInsert, IRCItalic);
break; case CTRL(L'U'): edit(win->tag, EditInsert, IRCUnderline);
break; case CTRL(L'V'): edit(win->tag, EditInsert, IRCReverse);
break; case L'\b': edit(win->tag, EditBackspace, 0);
break; case L'\t': edit(win->tag, EditComplete, 0);
break; case L'\n': edit(win->tag, EditEnter, 0);
break; default: if (iswprint(ch)) edit(win->tag, EditInsert, ch);
}
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}
void uiRead(void) {
if (ui.hide) uiShow();
int ret;
wint_t ch;
while (ERR != (ret = wget_wch(ui.input, &ch))) {
(ret == KEY_CODE_YES ? keyCode(ch) : keyChar(ch));
}
uiPrompt(false);
}
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static bool isAction(struct Tag tag, const wchar_t *input) {
if (tag.id == TagStatus.id || tag.id == TagRaw.id) return false;
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return !wcsncasecmp(input, L"/me ", 4);
}
static bool isCommand(struct Tag tag, const wchar_t *input) {
if (tag.id == TagStatus.id || tag.id == TagRaw.id) return true;
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if (input[0] != L'/') return false;
const wchar_t *space = wcschr(&input[1], L' ');
const wchar_t *extra = wcschr(&input[1], L'/');
return !extra || (space && extra > space);
}
void uiPrompt(bool nickChanged) {
static wchar_t *promptMesg;
static wchar_t *promptAction;
if (nickChanged || !promptMesg || !promptAction) {
free(promptMesg);
free(promptAction);
enum IRCColor color = formatColor(self.user);
int len = aswprintf(&promptMesg, L"\3%d<%s>\3 ", color, self.nick);
if (len < 0) err(EX_OSERR, "aswprintf");
len = aswprintf(&promptAction, L"\3%d* %s\3 ", color, self.nick);
if (len < 0) err(EX_OSERR, "aswprintf");
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}
const wchar_t *input = editHead();
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wmove(ui.input, 0, 0);
if (windows.active) {
if (isAction(windows.active->tag, input) && editTail() >= &input[4]) {
input = &input[4];
addWrap(ui.input, promptAction);
} else if (!isCommand(windows.active->tag, input)) {
addWrap(ui.input, promptMesg);
}
}
int x = 0;
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struct Format format = { .str = input };
formatReset(&format);
while (formatParse(&format, editTail())) {
if (format.split) getyx(ui.input, _, x);
addFormat(ui.input, &format);
}
wclrtoeol(ui.input);
wmove(ui.input, 0, x);
}