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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 <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <sysexits.h>
#include <wchar.h>
#include <wctype.h>
#ifndef A_ITALIC
#define A_ITALIC A_NORMAL
#endif
#include "chat.h"
#undef uiFmt
#define MIN(a, b) ((a) < (b) ? (a) : (b))
#define MAX(a, b) ((a) > (b) ? (a) : (b))
#define CTRL(c) ((c) & 037)
static void colorInit(void) {
start_color();
use_default_colors();
if (COLORS >= 16) {
for (short pair = 0; pair < 0x100; ++pair) {
if (pair < 0x10) {
init_pair(1 + pair, pair, -1);
} else {
init_pair(1 + pair, pair & 0x0F, (pair & 0xF0) >> 4);
}
}
} else {
for (short pair = 0; pair < 0100; ++pair) {
if (pair < 010) {
init_pair(1 + pair, pair, -1);
} else {
init_pair(1 + pair, pair & 007, (pair & 070) >> 3);
}
}
}
}
static attr_t attr8(short pair) {
if (COLORS >= 16 || pair < 0) return A_NORMAL;
return (pair & 0x08) ? A_BOLD : A_NORMAL;
}
static short pair8(short pair) {
if (COLORS >= 16 || pair < 0) return pair;
return (pair & 0x70) >> 1 | (pair & 0x07);
}
struct View {
struct Tag tag;
WINDOW *topic;
WINDOW *log;
int scroll;
int unread;
bool hot;
bool mark;
struct View *prev;
struct View *next;
};
static struct {
struct View *head;
struct View *tail;
struct View *tags[TAGS_LEN];
} views;
static void viewAppend(struct View *view) {
if (views.tail) views.tail->next = view;
view->prev = views.tail;
view->next = NULL;
if (!views.head) views.head = view;
views.tail = view;
views.tags[view->tag.id] = view;
}
static void viewRemove(struct View *view) {
if (view->prev) view->prev->next = view->next;
if (view->next) view->next->prev = view->prev;
if (views.head == view) views.head = view->next;
if (views.tail == view) views.tail = view->prev;
views.tags[view->tag.id] = NULL;
}
static const int LOG_LINES = 256;
static const int TOPIC_COLS = 512;
static const int INPUT_COLS = 512;
static int logHeight(const struct View *view) {
return LINES - (view->topic ? 2 : 0) - 2;
}
static int lastLogLine(void) {
return LOG_LINES - 1;
}
static int lastLine(void) {
return LINES - 1;
}
static int lastCol(void) {
return COLS - 1;
}
static struct View *viewTag(struct Tag tag) {
struct View *view = views.tags[tag.id];
if (view) return view;
view = calloc(1, sizeof(*view));
if (!view) err(EX_OSERR, "calloc");
view->tag = tag;
view->log = newpad(LOG_LINES, COLS);
wsetscrreg(view->log, 0, lastLogLine());
scrollok(view->log, true);
wmove(view->log, lastLogLine() - logHeight(view) + 2, 0);
view->scroll = LOG_LINES;
viewAppend(view);
return view;
}
static void viewClose(struct View *view) {
viewRemove(view);
if (view->topic) delwin(view->topic);
delwin(view->log);
free(view);
}
static void viewMark(struct View *view) {
view->mark = true;
}
static void viewUnmark(struct View *view) {
view->unread = 0;
view->hot = false;
view->mark = false;
}
static struct {
bool hide;
struct View *view;
WINDOW *input;
} ui;
void uiHide(void) {
ui.hide = true;
termMode(TERM_FOCUS, false);
endwin();
}
static void uiShow(void) {
ui.hide = false;
termMode(TERM_FOCUS, true);
}
void uiInit(void) {
setlocale(LC_CTYPE, "");
initscr();
cbreak();
noecho();
colorInit();
termInit();
ui.input = newpad(2, INPUT_COLS);
mvwhline(ui.input, 0, 0, ACS_HLINE, INPUT_COLS);
wmove(ui.input, 1, 0);
keypad(ui.input, true);
nodelay(ui.input, true);
ui.view = viewTag(TAG_STATUS);
termTitle(TAG_STATUS.name);
uiShow();
}
void uiExit(void) {
uiHide();
printf(
"This program is AGPLv3 free software!\n"
"The source is available at <" SOURCE_URL ">.\n"
);
}
static void uiResize(void) {
for (struct View *view = views.head; view; view = view->next) {
wresize(view->log, LOG_LINES, COLS);
wmove(view->log, lastLogLine(), lastCol());
}
}
void uiDraw(void) {
if (ui.hide) return;
if (ui.view->topic) {
pnoutrefresh(
ui.view->topic,
0, 0,
0, 0,
1, lastCol()
);
}
pnoutrefresh(
ui.view->log,
ui.view->scroll - logHeight(ui.view), 0,
(ui.view->topic ? 2 : 0), 0,
lastLine() - 2, lastCol()
);
int _, x;
getyx(ui.input, _, x);
pnoutrefresh(
ui.input,
0, MAX(0, x - lastCol() + 3),
lastLine() - 1, 0,
lastLine(), lastCol()
);
doupdate();
}
static void uiRedraw(void) {
clearok(curscr, true);
}
static void uiView(struct View *view) {
termTitle(view->tag.name);
if (view->topic) touchwin(view->topic);
touchwin(view->log);
viewMark(ui.view);
viewUnmark(view);
ui.view = view;
}
static void uiClose(struct View *view) {
if (ui.view == view) {
if (view->next) {
uiView(view->next);
} else if (view->prev) {
uiView(view->prev);
} else {
return;
}
}
viewClose(view);
}
void uiViewTag(struct Tag tag) {
uiView(viewTag(tag));
}
void uiCloseTag(struct Tag tag) {
uiClose(viewTag(tag));
}
void uiViewNum(int num) {
if (num < 0) {
for (struct View *view = views.tail; view; view = view->prev) {
if (++num) continue;
uiView(view);
break;
}
} else {
for (struct View *view = views.head; view; view = view->next) {
if (num--) continue;
uiView(view);
break;
}
}
}
static const short IRC_COLORS[] = {
[IRC_WHITE] = 8 + COLOR_WHITE,
[IRC_BLACK] = 0 + COLOR_BLACK,
[IRC_BLUE] = 0 + COLOR_BLUE,
[IRC_GREEN] = 0 + COLOR_GREEN,
[IRC_RED] = 8 + COLOR_RED,
[IRC_BROWN] = 0 + COLOR_RED,
[IRC_MAGENTA] = 0 + COLOR_MAGENTA,
[IRC_ORANGE] = 0 + COLOR_YELLOW,
[IRC_YELLOW] = 8 + COLOR_YELLOW,
[IRC_LIGHT_GREEN] = 8 + COLOR_GREEN,
[IRC_CYAN] = 0 + COLOR_CYAN,
[IRC_LIGHT_CYAN] = 8 + COLOR_CYAN,
[IRC_LIGHT_BLUE] = 8 + COLOR_BLUE,
[IRC_PINK] = 8 + COLOR_MAGENTA,
[IRC_GRAY] = 8 + COLOR_BLACK,
[IRC_LIGHT_GRAY] = 0 + COLOR_WHITE,
};
static const wchar_t *parseColor(short *pair, const wchar_t *str) {
short fg = 0;
size_t fgLen = MIN(wcsspn(str, L"0123456789"), 2);
if (!fgLen) { *pair = -1; return str; }
for (size_t i = 0; i < fgLen; ++i) {
fg = fg * 10 + (str[i] - L'0');
}
str = &str[fgLen];
short bg = 0;
size_t bgLen = 0;
if (str[0] == L',') bgLen = MIN(wcsspn(&str[1], L"0123456789"), 2);
for (size_t i = 0; i < bgLen; ++i) {
bg = bg * 10 + (str[1 + i] - L'0');
}
if (bgLen) str = &str[1 + bgLen];
if (*pair == -1) *pair = 0;
*pair = (*pair & 0xF0) | IRC_COLORS[fg & 0x0F];
if (bgLen) *pair = (*pair & 0x0F) | (IRC_COLORS[bg & 0x0F] << 4);
return str;
}
static void wordWrap(WINDOW *win, const wchar_t *str) {
size_t len = wcscspn(str, L" ");
size_t width = 1;
for (size_t i = 0; i < len; ++i) {
if (iswprint(str[i])) width += wcwidth(str[i]);
}
int _, x, xMax;
getyx(win, _, x);
getmaxyx(win, _, xMax);
if (width >= (size_t)(xMax - x)) {
waddch(win, '\n');
} else {
waddch(win, ' ');
}
}
static const wchar_t IRC_CODES[] = {
L' ',
IRC_BOLD,
IRC_COLOR,
IRC_REVERSE,
IRC_RESET,
IRC_ITALIC,
IRC_UNDERLINE,
L'\0',
};
static void addIRC(WINDOW *win, const wchar_t *str) {
attr_t attr = A_NORMAL;
short pair = -1;
for (;;) {
size_t cc = wcscspn(str, IRC_CODES);
wattr_set(win, attr | attr8(pair), 1 + pair8(pair), NULL);
waddnwstr(win, str, cc);
if (!str[cc]) break;
str = &str[cc];
switch (*str++) {
break; case L' ': wordWrap(win, str);
break; case IRC_BOLD: attr ^= A_BOLD;
break; case IRC_ITALIC: attr ^= A_ITALIC;
break; case IRC_UNDERLINE: attr ^= A_UNDERLINE;
break; case IRC_REVERSE: attr ^= A_REVERSE;
break; case IRC_COLOR: str = parseColor(&pair, str);
break; case IRC_RESET: attr = A_NORMAL; pair = -1;
}
}
}
void uiTopic(struct Tag tag, const char *topic) {
struct View *view = viewTag(tag);
if (!view->topic) {
view->topic = newpad(2, TOPIC_COLS);
mvwhline(view->topic, 1, 0, ACS_HLINE, TOPIC_COLS);
}
wchar_t *wcs = ambstowcs(topic);
if (!wcs) err(EX_DATAERR, "ambstowcs");
wmove(view->topic, 0, 0);
addIRC(view->topic, wcs);
wclrtoeol(view->topic);
free(wcs);
}
void uiLog(struct Tag tag, enum UIHeat heat, const wchar_t *line) {
struct View *view = viewTag(tag);
waddch(view->log, '\n');
if (view->mark && heat > UI_COLD) {
if (!view->unread++) waddch(view->log, '\n');
if (heat > UI_WARM) {
view->hot = true;
beep(); // TODO: Notification.
}
}
addIRC(view->log, line);
}
void uiFmt(struct Tag tag, enum UIHeat heat, const wchar_t *format, ...) {
wchar_t *wcs;
va_list ap;
va_start(ap, format);
vaswprintf(&wcs, format, ap);
va_end(ap);
if (!wcs) err(EX_OSERR, "vaswprintf");
uiLog(tag, heat, wcs);
free(wcs);
}
static void logScrollUp(int lines) {
int height = logHeight(ui.view);
if (ui.view->scroll == height) return;
if (ui.view->scroll == LOG_LINES) viewMark(ui.view);
ui.view->scroll = MAX(ui.view->scroll - lines, height);
}
static void logScrollDown(int lines) {
if (ui.view->scroll == LOG_LINES) return;
ui.view->scroll = MIN(ui.view->scroll + lines, LOG_LINES);
if (ui.view->scroll == LOG_LINES) viewUnmark(ui.view);
}
static void logPageUp(void) {
logScrollUp(logHeight(ui.view) / 2);
}
static void logPageDown(void) {
logScrollDown(logHeight(ui.view) / 2);
}
static bool keyChar(wchar_t ch) {
if (iswascii(ch)) {
enum TermEvent event = termEvent((char)ch);
switch (event) {
break; case TERM_FOCUS_IN: viewUnmark(ui.view);
break; case TERM_FOCUS_OUT: viewMark(ui.view);
break; default: {}
}
if (event) return false;
}
static bool meta;
if (ch == L'\33') {
meta = true;
return false;
}
if (meta) {
bool update = true;
switch (ch) {
break; case L'b': edit(ui.view->tag, EDIT_BACK_WORD, 0);
break; case L'f': edit(ui.view->tag, EDIT_FORE_WORD, 0);
break; case L'\b': edit(ui.view->tag, EDIT_KILL_BACK_WORD, 0);
break; case L'd': edit(ui.view->tag, EDIT_KILL_FORE_WORD, 0);
break; default: {
update = false;
if (ch < L'0' || ch > L'9') break;
uiViewNum(ch - L'0');
}
}
meta = false;
return update;
}
if (ch == L'\177') ch = L'\b';
switch (ch) {
break; case CTRL(L'L'): uiRedraw(); return false;
break; case CTRL(L'A'): edit(ui.view->tag, EDIT_HOME, 0);
break; case CTRL(L'B'): edit(ui.view->tag, EDIT_LEFT, 0);
break; case CTRL(L'D'): edit(ui.view->tag, EDIT_DELETE, 0);
break; case CTRL(L'E'): edit(ui.view->tag, EDIT_END, 0);
break; case CTRL(L'F'): edit(ui.view->tag, EDIT_RIGHT, 0);
break; case CTRL(L'K'): edit(ui.view->tag, EDIT_KILL_LINE, 0);
break; case CTRL(L'W'): edit(ui.view->tag, EDIT_KILL_BACK_WORD, 0);
break; case CTRL(L'C'): edit(ui.view->tag, EDIT_INSERT, IRC_COLOR);
break; case CTRL(L'N'): edit(ui.view->tag, EDIT_INSERT, IRC_RESET);
break; case CTRL(L'O'): edit(ui.view->tag, EDIT_INSERT, IRC_BOLD);
break; case CTRL(L'R'): edit(ui.view->tag, EDIT_INSERT, IRC_COLOR);
break; case CTRL(L'T'): edit(ui.view->tag, EDIT_INSERT, IRC_ITALIC);
break; case CTRL(L'U'): edit(ui.view->tag, EDIT_INSERT, IRC_UNDERLINE);
break; case CTRL(L'V'): edit(ui.view->tag, EDIT_INSERT, IRC_REVERSE);
break; case L'\b': edit(ui.view->tag, EDIT_BACKSPACE, 0);
break; case L'\t': edit(ui.view->tag, EDIT_COMPLETE, 0);
break; case L'\n': edit(ui.view->tag, EDIT_ENTER, 0);
break; default: {
if (!iswprint(ch)) return false;
edit(ui.view->tag, EDIT_INSERT, ch);
}
}
return true;
}
static bool keyCode(wchar_t ch) {
switch (ch) {
break; case KEY_RESIZE: uiResize(); return false;
break; case KEY_SLEFT: logScrollUp(1); return false;
break; case KEY_SRIGHT: logScrollDown(1); return false;
break; case KEY_PPAGE: logPageUp(); return false;
break; case KEY_NPAGE: logPageDown(); return false;
break; case KEY_LEFT: edit(ui.view->tag, EDIT_LEFT, 0);
break; case KEY_RIGHT: edit(ui.view->tag, EDIT_RIGHT, 0);
break; case KEY_HOME: edit(ui.view->tag, EDIT_HOME, 0);
break; case KEY_END: edit(ui.view->tag, EDIT_END, 0);
break; case KEY_DC: edit(ui.view->tag, EDIT_DELETE, 0);
break; case KEY_BACKSPACE: edit(ui.view->tag, EDIT_BACKSPACE, 0);
break; case KEY_ENTER: edit(ui.view->tag, EDIT_ENTER, 0);
}
return true;
}
void uiRead(void) {
uiShow();
bool update = false;
int ret;
wint_t ch;
while (ERR != (ret = wget_wch(ui.input, &ch))) {
if (ret == KEY_CODE_YES) {
update |= keyCode(ch);
} else {
update |= keyChar(ch);
}
}
if (!update) return;
int y, x;
wmove(ui.input, 1, 0);
addIRC(ui.input, editHead());
getyx(ui.input, y, x);
addIRC(ui.input, editTail());
wclrtoeol(ui.input);
wmove(ui.input, y, x);
}
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