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
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static void colorInit(void) {
start_color();
use_default_colors();
if (COLORS >= 16) {
for (short pair = 0; pair < 0x100; ++pair) {
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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) {
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if (pair < 010) {
init_pair(1 + pair, pair, -1);
} else {
init_pair(1 + pair, pair & 007, (pair & 070) >> 3);
}
}
}
}
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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);
}
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struct View {
struct Tag tag;
WINDOW *log;
int scroll, unread;
bool hot, mark;
struct View *prev;
struct View *next;
};
static struct {
bool hide;
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WINDOW *status;
WINDOW *input;
struct View *view;
} ui;
static void uiShow(void) {
ui.hide = false;
termMode(TermFocus, true);
}
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void uiHide(void) {
ui.hide = true;
termMode(TermFocus, false);
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endwin();
}
void uiInit(void) {
setlocale(LC_CTYPE, "");
initscr();
cbreak();
noecho();
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colorInit();
termInit();
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ui.status = newwin(1, COLS, 0, 0);
ui.input = newpad(1, 512);
keypad(ui.input, true);
nodelay(ui.input, true);
uiViewTag(TagStatus);
}
void uiExit(void) {
uiHide();
printf(
"This program is AGPLv3 Free Software!\n"
"The source is available at <" SOURCE_URL ">.\n"
);
}
static int lastLine(void) {
return LINES - 1;
}
static int lastCol(void) {
return COLS - 1;
}
static int logHeight(void) {
return LINES - 2;
}
void uiDraw(void) {
if (ui.hide) return;
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wnoutrefresh(ui.status);
pnoutrefresh(
ui.view->log,
ui.view->scroll - logHeight(), 0,
1, 0,
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lastLine() - 1, lastCol()
);
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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 pair = -1;
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if (format->fg != IRCDefault) pair = Colors[format->fg];
if (format->bg != IRCDefault) pair |= Colors[format->bg] << 4;
wattr_set(win, attr | attr8(pair), 1 + pair8(pair), 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);
while (formatParse(&format, NULL)) {
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size_t word = 1 + wcscspn(&format.str[1], L" ");
if (word < format.len) format.len = word;
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int _, x, xMax;
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++;
}
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addFormat(win, &format);
}
return lines;
}
static struct {
struct View *head;
struct View *tail;
struct View *tags[TagsLen];
} views;
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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 View *view = views.head; view; view = view->next, ++num) {
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if (!view->unread && view != ui.view) continue;
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int unread;
wchar_t *str;
int len = aswprintf(
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&str, L"%c %d:%s%n(\3%02d%d\3) ",
(view == ui.view ? IRCReverse : IRCReset),
num, view->tag.name,
&unread, (view->hot ? IRCYellow : IRCDefault), view->unread
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);
if (len < 0) err(EX_OSERR, "aswprintf");
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if (!view->unread) {
str[unread + 0] = L' ';
str[unread + 1] = L'\0';
}
addWrap(ui.status, str);
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free(str);
}
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wclrtoeol(ui.status);
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}
static void viewAppend(struct View *view) {
if (views.tail) views.tail->next = view;
view->prev = views.tail;
view->next = NULL;
views.tail = view;
if (!views.head) views.head = 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 LogLines = 256;
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(LogLines, COLS);
wsetscrreg(view->log, 0, LogLines - 1);
scrollok(view->log, true);
wmove(view->log, LogLines - 1, 0);
view->scroll = LogLines;
view->mark = true;
viewAppend(view);
return view;
}
static void viewClose(struct View *view) {
viewRemove(view);
delwin(view->log);
free(view);
}
static void uiResize(void) {
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wresize(ui.status, 1, COLS);
for (struct View *view = views.head; view; view = view->next) {
wresize(view->log, LogLines, COLS);
wmove(view->log, LogLines - 1, lastCol());
}
}
static void viewUnmark(struct View *view) {
view->mark = false;
view->unread = 0;
view->hot = false;
uiStatus();
}
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static void uiView(struct View *view) {
termTitle(view->tag.name);
touchwin(view->log);
if (ui.view) ui.view->mark = true;
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viewUnmark(view);
ui.view = view;
uiStatus();
uiPrompt();
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}
void uiViewTag(struct Tag tag) {
uiView(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;
}
}
}
void uiCloseTag(struct Tag tag) {
struct View *view = viewTag(tag);
if (ui.view == view) {
if (view->next) {
uiView(view->next);
} else if (view->prev) {
uiView(view->prev);
} else {
return;
}
}
viewClose(view);
}
void uiLog(struct Tag tag, enum UIHeat heat, const wchar_t *line) {
struct View *view = viewTag(tag);
int lines = 1;
waddch(view->log, '\n');
if (view->mark && heat > UICold) {
if (!view->unread++) {
lines++;
waddch(view->log, '\n');
}
if (heat > UIWarm) {
view->hot = true;
beep(); // TODO: Notify.
}
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uiStatus();
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}
lines += addWrap(view->log, line);
if (view->scroll != LogLines) view->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 scrollUp(int lines) {
if (ui.view->scroll == logHeight()) return;
if (ui.view->scroll == LogLines) ui.view->mark = true;
ui.view->scroll = MAX(ui.view->scroll - lines, logHeight());
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}
static void scrollDown(int lines) {
if (ui.view->scroll == LogLines) return;
ui.view->scroll = MIN(ui.view->scroll + lines, LogLines);
if (ui.view->scroll == LogLines) viewUnmark(ui.view);
}
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static void keyCode(wchar_t ch) {
switch (ch) {
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break; case KEY_RESIZE: uiResize();
break; case KEY_SLEFT: scrollUp(1);
break; case KEY_SRIGHT: scrollDown(1);
break; case KEY_PPAGE: scrollUp(logHeight() / 2);
break; case KEY_NPAGE: scrollDown(logHeight() / 2);
break; case KEY_LEFT: edit(ui.view->tag, EditLeft, 0);
break; case KEY_RIGHT: edit(ui.view->tag, EditRight, 0);
break; case KEY_HOME: edit(ui.view->tag, EditHome, 0);
break; case KEY_END: edit(ui.view->tag, EditEnd, 0);
break; case KEY_DC: edit(ui.view->tag, EditDelete, 0);
break; case KEY_BACKSPACE: edit(ui.view->tag, EditBackspace, 0);
break; case KEY_ENTER: edit(ui.view->tag, EditEnter, 0);
}
}
#define CTRL(ch) ((ch) ^ 0100)
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static void keyChar(wchar_t ch) {
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if (ch < 0200) {
enum TermEvent event = termEvent((char)ch);
switch (event) {
break; case TermFocusIn: viewUnmark(ui.view);
break; case TermFocusOut: ui.view->mark = true;
break; default: {}
}
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if (event) return;
}
static bool meta;
if (ch == L'\33') {
meta = true;
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return;
}
if (ch == L'\177') ch = L'\b';
if (meta) {
meta = false;
switch (ch) {
break; case L'b': edit(ui.view->tag, EditBackWord, 0);
break; case L'f': edit(ui.view->tag, EditForeWord, 0);
break; case L'\b': edit(ui.view->tag, EditKillBackWord, 0);
break; case L'd': edit(ui.view->tag, EditKillForeWord, 0);
break; default: {
if (ch >= L'0' && ch <= L'9') uiViewNum(ch - L'0');
}
}
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return;
}
switch (ch) {
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break; case CTRL(L'L'): clearok(curscr, true);
break; case CTRL(L'A'): edit(ui.view->tag, EditHome, 0);
break; case CTRL(L'B'): edit(ui.view->tag, EditLeft, 0);
break; case CTRL(L'D'): edit(ui.view->tag, EditDelete, 0);
break; case CTRL(L'E'): edit(ui.view->tag, EditEnd, 0);
break; case CTRL(L'F'): edit(ui.view->tag, EditRight, 0);
break; case CTRL(L'K'): edit(ui.view->tag, EditKillLine, 0);
break; case CTRL(L'W'): edit(ui.view->tag, EditKillBackWord, 0);
break; case CTRL(L'C'): edit(ui.view->tag, EditInsert, IRCColor);
break; case CTRL(L'N'): edit(ui.view->tag, EditInsert, IRCReset);
break; case CTRL(L'O'): edit(ui.view->tag, EditInsert, IRCBold);
break; case CTRL(L'R'): edit(ui.view->tag, EditInsert, IRCColor);
break; case CTRL(L'T'): edit(ui.view->tag, EditInsert, IRCItalic);
break; case CTRL(L'U'): edit(ui.view->tag, EditInsert, IRCUnderline);
break; case CTRL(L'V'): edit(ui.view->tag, EditInsert, IRCReverse);
break; case L'\b': edit(ui.view->tag, EditBackspace, 0);
break; case L'\t': edit(ui.view->tag, EditComplete, 0);
break; case L'\n': edit(ui.view->tag, EditEnter, 0);
break; default: {
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if (iswprint(ch)) edit(ui.view->tag, EditInsert, ch);
}
}
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}
static bool isAction(struct Tag tag, const wchar_t *input) {
if (tag.id == TagStatus.id || tag.id == TagVerbose.id) return false;
return !wcsncasecmp(input, L"/me ", 4);
}
// FIXME: This duplicates logic from input.c for wcs.
static bool isCommand(struct Tag tag, const wchar_t *input) {
if (tag.id == TagStatus.id || tag.id == TagVerbose.id) return true;
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(void) {
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const wchar_t *input = editHead();
// TODO: Avoid reformatting these on every read.
wchar_t *prompt = NULL;
int len = 0;
if (isAction(ui.view->tag, input) && editTail() >= &input[4]) {
input = &input[4];
len = aswprintf(
&prompt, L"\3%d* %s\3 ",
formatColor(self.user), self.nick
);
} else if (!isCommand(ui.view->tag, input)) {
len = aswprintf(
&prompt, L"\3%d(%s)\3 ",
formatColor(self.user), self.nick
);
}
if (len < 0) err(EX_OSERR, "aswprintf");
wmove(ui.input, 0, 0);
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if (prompt) addWrap(ui.input, prompt);
free(prompt);
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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);
}
void uiRead(void) {
uiShow();
int ret;
wint_t ch;
while (ERR != (ret = wget_wch(ui.input, &ch))) {
if (ret == KEY_CODE_YES) {
keyCode(ch);
} else {
keyChar(ch);
}
}
uiPrompt();
}