catboy/input.c

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2022-02-20 01:20:19 +00:00
/* Copyright (C) 2020 June McEnroe <june@causal.agency>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
* Additional permission under GNU GPL version 3 section 7:
*
* If you modify this Program, or any covered work, by linking or
* combining it with OpenSSL (or a modified version of that library),
* containing parts covered by the terms of the OpenSSL License and the
* original SSLeay license, the licensors of this Program grant you
* additional permission to convey the resulting work. Corresponding
* Source for a non-source form of such a combination shall include the
* source code for the parts of OpenSSL used as well as that of the
* covered work.
*/
#define _XOPEN_SOURCE_EXTENDED
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#include <assert.h>
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#include <curses.h>
#include <err.h>
#include <signal.h>
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#include <stdbool.h>
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#include <stdio.h>
#include <stdlib.h>
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#include <string.h>
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#include <sysexits.h>
#include <termios.h>
#include <unistd.h>
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#include <wchar.h>
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#include <wctype.h>
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#include "chat.h"
#include "edit.h"
#define ENUM_KEY \
X(KeyCtrlLeft, "\33[1;5D", NULL) \
X(KeyCtrlRight, "\33[1;5C", NULL) \
X(KeyMeta0, "\0330", "\33)") \
X(KeyMeta1, "\0331", "\33!") \
X(KeyMeta2, "\0332", "\33@") \
X(KeyMeta3, "\0333", "\33#") \
X(KeyMeta4, "\0334", "\33$") \
X(KeyMeta5, "\0335", "\33%") \
X(KeyMeta6, "\0336", "\33^") \
X(KeyMeta7, "\0337", "\33&") \
X(KeyMeta8, "\0338", "\33*") \
X(KeyMeta9, "\0339", "\33(") \
X(KeyMetaA, "\33a", NULL) \
X(KeyMetaB, "\33b", NULL) \
X(KeyMetaD, "\33d", NULL) \
X(KeyMetaF, "\33f", NULL) \
X(KeyMetaL, "\33l", NULL) \
X(KeyMetaM, "\33m", NULL) \
X(KeyMetaN, "\33n", NULL) \
X(KeyMetaP, "\33p", NULL) \
X(KeyMetaQ, "\33q", NULL) \
X(KeyMetaS, "\33s", NULL) \
X(KeyMetaT, "\33t", NULL) \
X(KeyMetaU, "\33u", NULL) \
X(KeyMetaV, "\33v", NULL) \
X(KeyMetaEnter, "\33\r", "\33\n") \
X(KeyMetaGt, "\33>", "\33.") \
X(KeyMetaLt, "\33<", "\33,") \
X(KeyMetaEqual, "\33=", NULL) \
X(KeyMetaMinus, "\33-", "\33_") \
X(KeyMetaPlus, "\33+", NULL) \
X(KeyMetaSlash, "\33/", "\33?") \
X(KeyFocusIn, "\33[I", NULL) \
X(KeyFocusOut, "\33[O", NULL) \
X(KeyPasteOn, "\33[200~", NULL) \
X(KeyPasteOff, "\33[201~", NULL) \
X(KeyPasteManual, "\32p", "\32\20")
enum {
KeyMax = KEY_MAX,
#define X(id, seq, alt) id,
ENUM_KEY
#undef X
};
static struct Edit cut;
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static struct Edit edits[IDCap];
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void inputInit(void) {
for (size_t i = 0; i < ARRAY_LEN(edits); ++i) {
edits[i].cut = &cut;
}
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struct termios term;
int error = tcgetattr(STDOUT_FILENO, &term);
if (error) err(EX_OSERR, "tcgetattr");
// Gain use of C-q, C-s, C-c, C-z, C-y, C-v, C-o.
term.c_iflag &= ~IXON;
term.c_cc[VINTR] = _POSIX_VDISABLE;
term.c_cc[VSUSP] = _POSIX_VDISABLE;
#ifdef VDSUSP
term.c_cc[VDSUSP] = _POSIX_VDISABLE;
#endif
term.c_cc[VLNEXT] = _POSIX_VDISABLE;
term.c_cc[VDISCARD] = _POSIX_VDISABLE;
error = tcsetattr(STDOUT_FILENO, TCSANOW, &term);
if (error) err(EX_OSERR, "tcsetattr");
def_prog_mode();
#define X(id, seq, alt) define_key(seq, id); if (alt) define_key(alt, id);
ENUM_KEY
#undef X
keypad(uiInput, true);
nodelay(uiInput, true);
}
static void inputAdd(struct Style reset, struct Style *style, const char *str) {
while (*str) {
const char *code = str;
size_t len = styleParse(style, &str);
wattr_set(uiInput, A_BOLD | A_REVERSE, 0, NULL);
switch (*code) {
break; case B: waddch(uiInput, 'B');
break; case C: waddch(uiInput, 'C');
break; case O: waddch(uiInput, 'O');
break; case R: waddch(uiInput, 'R');
break; case I: waddch(uiInput, 'I');
break; case U: waddch(uiInput, 'U');
break; case '\n': waddch(uiInput, 'N');
}
if (str - code > 1) waddnstr(uiInput, &code[1], str - &code[1]);
if (str[0] == '\n') {
*style = reset;
str++;
len--;
}
size_t nl = strcspn(str, "\n");
if (nl < len) len = nl;
wattr_set(uiInput, uiAttr(*style), uiPair(*style), NULL);
waddnstr(uiInput, str, len);
str += len;
}
}
static char *inputStop(
struct Style reset, struct Style *style,
const char *str, char *stop
) {
char ch = *stop;
*stop = '\0';
inputAdd(reset, style, str);
*stop = ch;
return stop;
}
static size_t cap;
static char *buf;
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void inputUpdate(void) {
uint id = windowID();
size_t pos = 0;
const char *ptr = editString(&edits[id], &buf, &cap, &pos);
if (!ptr) err(EX_OSERR, "editString");
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const char *prefix = "";
const char *prompt = self.nick;
const char *suffix = "";
const char *skip = buf;
struct Style stylePrompt = { .fg = self.color, .bg = Default };
struct Style styleInput = StyleDefault;
size_t split = commandWillSplit(id, buf);
const char *privmsg = commandIsPrivmsg(id, buf);
const char *notice = commandIsNotice(id, buf);
const char *action = commandIsAction(id, buf);
if (privmsg) {
prefix = "<"; suffix = "> ";
skip = privmsg;
} else if (notice) {
prefix = "-"; suffix = "- ";
styleInput.fg = LightGray;
skip = notice;
} else if (action) {
prefix = "* "; suffix = " ";
stylePrompt.attr |= Italic;
styleInput.attr |= Italic;
skip = action;
} else if (id == Debug && buf[0] != '/') {
prompt = "<< ";
stylePrompt.fg = Gray;
} else {
prompt = "";
}
if (skip > &buf[pos]) {
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prefix = prompt = suffix = "";
skip = buf;
}
int y, x;
wmove(uiInput, 0, 0);
if (windowTimeEnable() && id != Network) {
whline(uiInput, ' ', windowTime.width);
wmove(uiInput, 0, windowTime.width);
}
wattr_set(uiInput, uiAttr(stylePrompt), uiPair(stylePrompt), NULL);
waddstr(uiInput, prefix);
waddstr(uiInput, prompt);
waddstr(uiInput, suffix);
getyx(uiInput, y, x);
int posx;
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struct Style style = styleInput;
inputStop(styleInput, &style, skip, &buf[pos]);
getyx(uiInput, y, posx);
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wmove(uiInput, y, x);
ptr = skip;
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style = styleInput;
if (split) {
ptr = inputStop(styleInput, &style, ptr, &buf[split]);
style = styleInput;
style.bg = Red;
}
inputAdd(styleInput, &style, ptr);
wclrtoeol(uiInput);
wmove(uiInput, y, posx);
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}
bool inputPending(uint id) {
return edits[id].len;
}
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static const struct {
const wchar_t *name;
const wchar_t *string;
} Macros[] = {
{ L"\\banhammer", L"▬▬▬▬▬▬▬▋ Ò╭╮Ó" },
{ L"\\bear", L"ʕっ•ᴥ•ʔっ" },
{ L"\\blush", L"(˶′◡‵˶)" },
{ L"\\com", L"\0038,4\2" },
{ L"\\cool", L"(⌐■_■)" },
{ L"\\flip", L"(╯°□°)╯︵ ┻━┻" },
{ L"\\gary", L"ᕕ( ᐛ )ᕗ" },
{ L"\\hug", L"(っ・∀・)っ" },
{ L"\\lenny", L"( ͡° ͜ʖ ͡°)" },
{ L"\\look", L"ಠ_ಠ" },
{ L"\\shrug", L"¯\\_(ツ)_/¯" },
{ L"\\unflip", L"┬─┬ノ(º_º)" },
{ L"\\wave", L"ヾ(^∇^)" },
};
void inputCompleteAdd(void) {
char mbs[256];
for (size_t i = 0; i < ARRAY_LEN(Macros); ++i) {
size_t n = wcstombs(mbs, Macros[i].name, sizeof(mbs));
assert(n != (size_t)-1);
completeAdd(None, mbs, Default);
}
}
static int macroExpand(struct Edit *e) {
size_t macro = e->pos;
while (macro && e->buf[macro] != L'\\') macro--;
if (macro == e->pos) return 0;
for (size_t i = 0; i < ARRAY_LEN(Macros); ++i) {
if (wcslen(Macros[i].name) != e->pos - macro) continue;
if (wcsncmp(Macros[i].name, &e->buf[macro], e->pos - macro)) continue;
if (wcstombs(NULL, Macros[i].string, 0) == (size_t)-1) continue;
size_t expand = wcslen(Macros[i].string);
int error = 0
|| editDelete(e, false, macro, e->pos - macro)
|| editReserve(e, macro, expand);
if (error) return error;
wcsncpy(&e->buf[macro], Macros[i].string, expand);
e->pos = macro + expand;
break;
}
return 0;
}
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static struct {
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uint id;
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char *pre;
size_t pos;
size_t len;
bool suffix;
} tab;
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static void tabAccept(void) {
completeAccept();
tab.len = 0;
}
static void tabReject(void) {
completeReject();
tab.len = 0;
}
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static int tabComplete(struct Edit *e, uint id) {
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if (tab.len && id != tab.id) {
tabAccept();
}
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if (!tab.len) {
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tab.id = id;
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tab.pos = e->pos;
while (tab.pos && !iswspace(e->buf[tab.pos-1])) tab.pos--;
tab.len = e->pos - tab.pos;
if (!tab.len) return 0;
size_t cap = tab.len * MB_CUR_MAX + 1;
char *buf = realloc(tab.pre, cap);
if (!buf) return -1;
tab.pre = buf;
const wchar_t *ptr = &e->buf[tab.pos];
size_t n = wcsnrtombs(tab.pre, &ptr, tab.len, cap-1, NULL);
if (n == (size_t)-1) return -1;
tab.pre[n] = '\0';
tab.suffix = true;
}
const char *comp = complete(id, tab.pre);
if (!comp) {
comp = complete(id, tab.pre);
tab.suffix ^= true;
}
if (!comp) {
tab.len = 0;
return 0;
}
size_t cap = strlen(comp) + 1;
wchar_t *wcs = malloc(sizeof(*wcs) * cap);
if (!wcs) return -1;
size_t n = mbstowcs(wcs, comp, cap);
assert(n != (size_t)-1);
bool colon = (tab.len >= 2 && e->buf[tab.pos + tab.len - 2] == L':');
int error = editDelete(e, false, tab.pos, tab.len);
if (error) goto fail;
tab.len = n;
if (wcs[0] == L'\\' || wcschr(wcs, L' ')) {
error = editReserve(e, tab.pos, tab.len);
if (error) goto fail;
} else if (wcs[0] != L'/' && tab.suffix && (!tab.pos || colon)) {
tab.len += 2;
error = editReserve(e, tab.pos, tab.len);
if (error) goto fail;
e->buf[tab.pos + n + 0] = L':';
e->buf[tab.pos + n + 1] = L' ';
} else if (tab.suffix && tab.pos >= 2 && e->buf[tab.pos - 2] == L':') {
tab.len += 2;
error = editReserve(e, tab.pos, tab.len);
if (error) goto fail;
e->buf[tab.pos - 2] = L',';
e->buf[tab.pos + n + 0] = L':';
e->buf[tab.pos + n + 1] = L' ';
} else {
tab.len++;
error = editReserve(e, tab.pos, tab.len);
if (error) goto fail;
if (!tab.suffix && tab.pos >= 2 && e->buf[tab.pos - 2] == L',') {
e->buf[tab.pos - 2] = L':';
}
e->buf[tab.pos + n] = L' ';
}
wmemcpy(&e->buf[tab.pos], wcs, n);
e->pos = tab.pos + tab.len;
free(wcs);
return 0;
fail:
free(wcs);
return -1;
}
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static void inputEnter(void) {
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uint id = windowID();
char *cmd = editString(&edits[id], &buf, &cap, NULL);
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if (!cmd) err(EX_OSERR, "editString");
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tabAccept();
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editFn(&edits[id], EditClear);
command(id, cmd);
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}
static void keyCode(int code) {
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int error = 0;
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struct Edit *edit = &edits[windowID()];
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switch (code) {
break; case KEY_RESIZE: uiResize();
break; case KeyFocusIn: windowUnmark();
break; case KeyFocusOut: windowMark();
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break; case KeyMetaEnter: error = editInsert(edit, L'\n');
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break; case KeyMetaEqual: windowToggleMute();
break; case KeyMetaMinus: windowToggleThresh(-1);
break; case KeyMetaPlus: windowToggleThresh(+1);
break; case KeyMetaSlash: windowSwap();
break; case KeyMetaGt: windowScroll(ScrollAll, -1);
break; case KeyMetaLt: windowScroll(ScrollAll, +1);
break; case KeyMeta0 ... KeyMeta9: windowShow(code - KeyMeta0);
break; case KeyMetaA: windowAuto();
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break; case KeyMetaB: error = editFn(edit, EditPrevWord);
break; case KeyMetaD: error = editFn(edit, EditDeleteNextWord);
break; case KeyMetaF: error = editFn(edit, EditNextWord);
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break; case KeyMetaL: windowBare();
break; case KeyMetaM: uiWrite(windowID(), Warm, NULL, "");
break; case KeyMetaN: windowScroll(ScrollHot, +1);
break; case KeyMetaP: windowScroll(ScrollHot, -1);
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break; case KeyMetaQ: error = editFn(edit, EditCollapse);
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break; case KeyMetaS: uiSpoilerReveal ^= true; windowUpdate();
break; case KeyMetaT: windowToggleTime();
break; case KeyMetaU: windowScroll(ScrollUnread, 0);
break; case KeyMetaV: windowScroll(ScrollPage, +1);
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break; case KeyCtrlLeft: error = editFn(edit, EditPrevWord);
break; case KeyCtrlRight: error = editFn(edit, EditNextWord);
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break; case KEY_BACKSPACE: error = editFn(edit, EditDeletePrev);
break; case KEY_DC: error = editFn(edit, EditDeleteNext);
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break; case KEY_DOWN: windowScroll(ScrollOne, -1);
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break; case KEY_END: error = editFn(edit, EditTail);
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break; case KEY_ENTER: inputEnter();
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break; case KEY_HOME: error = editFn(edit, EditHead);
break; case KEY_LEFT: error = editFn(edit, EditPrev);
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break; case KEY_NPAGE: windowScroll(ScrollPage, -1);
break; case KEY_PPAGE: windowScroll(ScrollPage, +1);
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break; case KEY_RIGHT: error = editFn(edit, EditNext);
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break; case KEY_SEND: windowScroll(ScrollAll, -1);
break; case KEY_SHOME: windowScroll(ScrollAll, +1);
break; case KEY_UP: windowScroll(ScrollOne, +1);
}
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if (error) err(EX_OSERR, "editFn");
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}
static void keyCtrl(wchar_t ch) {
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int error = 0;
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struct Edit *edit = &edits[windowID()];
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switch (ch ^ L'@') {
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break; case L'?': error = editFn(edit, EditDeletePrev);
break; case L'A': error = editFn(edit, EditHead);
break; case L'B': error = editFn(edit, EditPrev);
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break; case L'C': raise(SIGINT);
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break; case L'D': error = editFn(edit, EditDeleteNext);
break; case L'E': error = editFn(edit, EditTail);
break; case L'F': error = editFn(edit, EditNext);
break; case L'H': error = editFn(edit, EditDeletePrev);
break; case L'I': error = tabComplete(edit, windowID());
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break; case L'J': inputEnter();
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break; case L'K': error = editFn(edit, EditDeleteTail);
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break; case L'L': clearok(curscr, true);
break; case L'N': windowShow(windowNum() + 1);
break; case L'P': windowShow(windowNum() - 1);
break; case L'R': windowSearch(editString(edit, &buf, &cap, NULL), -1);
break; case L'S': windowSearch(editString(edit, &buf, &cap, NULL), +1);
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break; case L'T': error = editFn(edit, EditTranspose);
break; case L'U': error = editFn(edit, EditDeleteHead);
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break; case L'V': windowScroll(ScrollPage, -1);
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break; case L'W': error = editFn(edit, EditDeletePrevWord);
break; case L'X': error = macroExpand(edit); tabAccept();
break; case L'Y': error = editFn(edit, EditPaste);
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}
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if (error) err(EX_OSERR, "editFn");
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}
static void keyStyle(wchar_t ch) {
if (iswcntrl(ch)) ch = towlower(ch ^ L'@');
char buf[8] = {0};
enum Color color = Default;
switch (ch) {
break; case L'A': color = Gray;
break; case L'B': color = Blue;
break; case L'C': color = Cyan;
break; case L'G': color = Green;
break; case L'K': color = Black;
break; case L'M': color = Magenta;
break; case L'N': color = Brown;
break; case L'O': color = Orange;
break; case L'P': color = Pink;
break; case L'R': color = Red;
break; case L'W': color = White;
break; case L'Y': color = Yellow;
break; case L'b': buf[0] = B;
break; case L'c': buf[0] = C;
break; case L'i': buf[0] = I;
break; case L'o': buf[0] = O;
break; case L'r': buf[0] = R;
break; case L's': {
snprintf(buf, sizeof(buf), "%c%02d,%02d", C, Black, Black);
}
break; case L'u': buf[0] = U;
}
if (color != Default) {
snprintf(buf, sizeof(buf), "%c%02d", C, color);
}
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struct Edit *edit = &edits[windowID()];
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for (char *ch = buf; *ch; ++ch) {
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int error = editInsert(edit, *ch);
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if (error) err(EX_OSERR, "editInsert");
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}
}
static bool waiting;
void inputWait(void) {
waiting = true;
}
void inputRead(void) {
if (isendwin()) {
if (waiting) {
uiShow();
flushinp();
waiting = false;
} else {
return;
}
}
wint_t ch;
static bool paste, style, literal;
for (int ret; ERR != (ret = wget_wch(uiInput, &ch));) {
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bool tabbing = false;
size_t pos = edits[tab.id].pos;
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bool spr = uiSpoilerReveal;
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if (ret == KEY_CODE_YES && ch == KeyPasteOn) {
paste = true;
} else if (ret == KEY_CODE_YES && ch == KeyPasteOff) {
paste = false;
} else if (ret == KEY_CODE_YES && ch == KeyPasteManual) {
paste ^= true;
} else if (paste || literal) {
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int error = editInsert(&edits[windowID()], ch);
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if (error) err(EX_OSERR, "editInsert");
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} else if (ret == KEY_CODE_YES) {
keyCode(ch);
} else if (ch == (L'Z' ^ L'@')) {
style = true;
continue;
} else if (style && ch == (L'V' ^ L'@')) {
literal = true;
continue;
} else if (style) {
keyStyle(ch);
} else if (iswcntrl(ch)) {
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tabbing = (ch == (L'I' ^ L'@'));
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keyCtrl(ch);
} else {
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int error = editInsert(&edits[windowID()], ch);
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if (error) err(EX_OSERR, "editInsert");
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}
style = false;
literal = false;
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if (!tabbing) {
if (edits[tab.id].pos > pos) {
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tabAccept();
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} else if (edits[tab.id].pos < pos) {
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tabReject();
}
}
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if (spr) {
uiSpoilerReveal = false;
windowUpdate();
}
}
inputUpdate();
}
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static int writeString(FILE *file, const char *str) {
return (fwrite(str, strlen(str) + 1, 1, file) ? 0 : -1);
}
int inputSave(FILE *file) {
int error;
for (uint id = 0; id < IDCap; ++id) {
if (!edits[id].len) continue;
char *ptr = editString(&edits[id], &buf, &cap, NULL);
if (!ptr) return -1;
error = 0
|| writeString(file, idNames[id])
|| writeString(file, ptr);
if (error) return error;
}
return writeString(file, "");
}
static ssize_t readString(FILE *file, char **buf, size_t *cap) {
ssize_t len = getdelim(buf, cap, '\0', file);
if (len < 0 && !feof(file)) err(EX_IOERR, "getdelim");
return len;
}
void inputLoad(FILE *file, size_t version) {
if (version < 8) return;
while (0 < readString(file, &buf, &cap) && buf[0]) {
uint id = idFor(buf);
readString(file, &buf, &cap);
size_t max = strlen(buf);
int error = editReserve(&edits[id], 0, max);
if (error) err(EX_OSERR, "editReserve");
size_t len = mbstowcs(edits[id].buf, buf, max);
assert(len != (size_t)-1);
edits[id].len = len;
edits[id].pos = len;
}
}