diff options
Diffstat (limited to 'client.c')
| -rwxr-xr-x | client.c | 325 |
1 files changed, 325 insertions, 0 deletions
diff --git a/client.c b/client.c new file mode 100755 index 0000000..775d296 --- /dev/null +++ b/client.c @@ -0,0 +1,325 @@ +#if 0 +exec cc -Wall -Wextra -pedantic $@ -lcurses -o client $0 +#endif + +#include <ctype.h> +#include <curses.h> +#include <err.h> +#include <errno.h> +#include <poll.h> +#include <stdint.h> +#include <stdio.h> +#include <stdlib.h> +#include <sys/socket.h> +#include <sys/un.h> +#include <sysexits.h> +#include <unistd.h> + +#undef COLOR_BLACK +#undef COLOR_RED +#undef COLOR_GREEN +#undef COLOR_YELLOW +#undef COLOR_BLUE +#undef COLOR_MAGENTA +#undef COLOR_CYAN +#undef COLOR_WHITE +#include "torus.h" + +#define ESC (0x1B) +#define DEL (0x7F) + +#define CH_COLOR(ch) (ch & A_BOLD ? COLOR_BRIGHT | ch >> 8 & 0xFF : ch >> 8 & 0xFF) + +static int client; + +static void clientMessage(const struct ClientMessage *msg) { + ssize_t len = send(client, msg, sizeof(*msg), 0); + if (len < 0) err(EX_IOERR, "send"); +} + +static void clientMove(int8_t dx, int8_t dy) { + struct ClientMessage msg = { .type = CLIENT_MOVE }; + msg.data.m.dx = dx; + msg.data.m.dy = dy; + clientMessage(&msg); +} + +static void clientColor(uint8_t color) { + struct ClientMessage msg = { .type = CLIENT_COLOR }; + msg.data.c = color; + clientMessage(&msg); +} + +static void clientPut(char cell) { + struct ClientMessage msg = { .type = CLIENT_PUT }; + msg.data.p = cell; + clientMessage(&msg); +} + +static enum { + MODE_NORMAL, + MODE_INSERT, + MODE_REPLACE, + MODE_DRAW, +} mode; +static struct { + int8_t dx; + int8_t dy; + uint8_t len; +} insert; +static char drawChar; + +static void insertMode(int8_t dx, int8_t dy) { + mode = MODE_INSERT; + insert.dx = dx; + insert.dy = dy; + insert.len = 0; +} + +static void swapCell(int8_t dx, int8_t dy) { + int sy, sx; + getyx(stdscr, sy, sx); + + move(sy + dy, sx + dx); + char swapCell = inch() & 0x7F; + uint8_t swapColor = CH_COLOR(inch()); + + move(sy, sx); + char cell = inch() & 0x7F; + uint8_t color = CH_COLOR(inch()); + + clientColor(swapColor); + clientPut(swapCell); + clientMove(dx, dy); + clientColor(color); + clientPut(cell); +} + +static void readInput(void) { + int c = getch(); + + if (mode == MODE_INSERT) { + if (c == ESC) { + mode = MODE_NORMAL; + clientMove(-insert.dx, -insert.dy); + } else if (!insert.dx && !insert.dy) { + switch (c) { + case 'h': insertMode(-1, 0); break; + case 'j': insertMode( 0, 1); break; + case 'k': insertMode( 0, -1); break; + case 'l': insertMode( 1, 0); break; + case 'y': insertMode(-1, -1); break; + case 'u': insertMode( 1, -1); break; + case 'b': insertMode(-1, 1); break; + case 'n': insertMode( 1, 1); break; + } + } else if (c == '\b' || c == DEL) { + clientMove(-insert.dx, -insert.dy); + clientPut(' '); + insert.len--; + } else if (c == '\n') { + clientMove(insert.dy, insert.dx); + for (uint8_t i = 0; i < insert.len; ++i) { + clientMove(-insert.dx, -insert.dy); + } + insert.len = 0; + } else if (isprint(c)) { + clientPut(c); + clientMove(insert.dx, insert.dy); + insert.len++; + } + return; + } + + if (mode == MODE_REPLACE) { + if (isprint(c)) clientPut(c); + mode = MODE_NORMAL; + return; + } + + if (mode == MODE_DRAW && !drawChar) { + if (c == ESC) mode = MODE_NORMAL; + if (isprint(c)) { + drawChar = c; + clientPut(c); + } + return; + } + + switch (c) { + case ESC: mode = MODE_NORMAL; break; + + case 'q': endwin(); exit(EX_OK); + + case 'a': clientMove(1, 0); // fallthrough + case 'i': insertMode(1, 0); break; + case 'I': insertMode(0, 0); break; + case 'r': mode = MODE_REPLACE; break; + case 'R': mode = MODE_DRAW; drawChar = 0; break; + case 'x': clientPut(' '); break; + case '~': clientPut(inch() & 0x7F); clientMove(1, 0); break; + + case 'h': clientMove(-1, 0); break; + case 'j': clientMove( 0, 1); break; + case 'k': clientMove( 0, -1); break; + case 'l': clientMove( 1, 0); break; + case 'y': clientMove(-1, -1); break; + case 'u': clientMove( 1, -1); break; + case 'b': clientMove(-1, 1); break; + case 'n': clientMove( 1, 1); break; + + case 'H': swapCell(-1, 0); break; + case 'J': swapCell( 0, 1); break; + case 'K': swapCell( 0, -1); break; + case 'L': swapCell( 1, 0); break; + case 'Y': swapCell(-1, -1); break; + case 'U': swapCell( 1, -1); break; + case 'B': swapCell(-1, 1); break; + case 'N': swapCell( 1, 1); break; + + case '1': clientColor(COLOR_RED); break; + case '2': clientColor(COLOR_GREEN); break; + case '3': clientColor(COLOR_YELLOW); break; + case '4': clientColor(COLOR_BLUE); break; + case '5': clientColor(COLOR_MAGENTA); break; + case '6': clientColor(COLOR_CYAN); break; + case '7': clientColor(COLOR_WHITE); break; + + case '!': clientColor(COLOR_BRIGHT | COLOR_RED); break; + case '@': clientColor(COLOR_BRIGHT | COLOR_GREEN); break; + case '#': clientColor(COLOR_BRIGHT | COLOR_YELLOW); break; + case '$': clientColor(COLOR_BRIGHT | COLOR_BLUE); break; + case '%': clientColor(COLOR_BRIGHT | COLOR_MAGENTA); break; + case '^': clientColor(COLOR_BRIGHT | COLOR_CYAN); break; + case '&': clientColor(COLOR_BRIGHT | COLOR_WHITE); break; + + case KEY_LEFT: clientMove(-1, 0); break; + case KEY_DOWN: clientMove( 0, 1); break; + case KEY_UP: clientMove( 0, -1); break; + case KEY_RIGHT: clientMove( 1, 0); break; + } + + if (mode == MODE_DRAW && drawChar) clientPut(drawChar); +} + +static void serverPut(uint8_t x, uint8_t y, uint8_t color, char cell) { + int attrs = COLOR_PAIR(color & ~COLOR_BRIGHT); + if (color & COLOR_BRIGHT) attrs |= A_BOLD; + mvaddch(y, x, attrs | cell); +} + +static void serverTile(void) { + struct Tile tile; + ssize_t len = recv(client, &tile, sizeof(tile), 0); + if (len < 0) err(EX_IOERR, "recv"); + if (len < (ssize_t)sizeof(tile)) { + errx(EX_PROTOCOL, "This tile isn't big enough..."); + } + + for (int y = 0; y < CELL_ROWS; ++y) { + for (int x = 0; x < CELL_COLS; ++x) { + serverPut(x, y, tile.colors[y][x], tile.cells[y][x]); + } + } +} + +static void readMessage(void) { + struct ServerMessage msg; + ssize_t len = recv(client, &msg, sizeof(msg), 0); + if (len < 0) err(EX_IOERR, "recv"); + if (len < (ssize_t)sizeof(msg)) errx(EX_PROTOCOL, "A message was cut short."); + + int sy, sx; + getyx(stdscr, sy, sx); + + switch (msg.type) { + case SERVER_TILE: + serverTile(); + break; + + case SERVER_MOVE: + move(msg.data.m.cellY, msg.data.m.cellX); + refresh(); + return; + + case SERVER_PUT: + serverPut( + msg.data.p.cellX, + msg.data.p.cellY, + msg.data.p.color, + msg.data.p.cell + ); + break; + + default: + errx(EX_PROTOCOL, "I don't know what %d means!", msg.type); + } + + move(sy, sx); + refresh(); +} + +static void drawBorder(void) { + if (LINES < CELL_ROWS || COLS < CELL_COLS) { + endwin(); + fprintf(stderr, "Sorry, your terminal is too small!\n"); + fprintf(stderr, "It needs to be at least 80x25 characters.\n"); + exit(EX_CONFIG); + } + if (LINES > CELL_ROWS) { + mvhline(CELL_ROWS, 0, 0, CELL_COLS); + } + if (COLS > CELL_COLS) { + mvvline(0, CELL_COLS, 0, CELL_ROWS); + } + if (LINES > CELL_ROWS && COLS > CELL_COLS) { + mvaddch(CELL_ROWS, CELL_COLS, ACS_LRCORNER); + } +} + +static void initColors(void) { + if (!has_colors()) { + endwin(); + fprintf(stderr, "Sorry, your terminal doesn't support colors!\n"); + fprintf(stderr, "I only need 16, I promise.\n"); + exit(EX_CONFIG); + } + start_color(); + for (int fg = COLOR_RED; fg < COLOR_BRIGHT; ++fg) { + init_pair(fg, fg, COLOR_BLACK); + } +} + +int main() { + client = socket(PF_LOCAL, SOCK_STREAM, 0); + if (client < 0) err(EX_OSERR, "socket"); + + struct sockaddr_un addr = { + .sun_family = AF_LOCAL, + .sun_path = "torus.sock", + }; + int error = connect(client, (struct sockaddr *)&addr, sizeof(addr)); + if (error) err(EX_IOERR, "torus.sock"); + + initscr(); + cbreak(); + noecho(); + keypad(stdscr, true); + set_escdelay(100); + + initColors(); + drawBorder(); + + struct pollfd fds[2] = { + { .fd = STDIN_FILENO, .events = POLLIN }, + { .fd = client, .events = POLLIN }, + }; + for (;;) { + int nfds = poll(fds, 2, -1); + if (nfds < 0 && errno == EINTR) continue; + if (nfds < 0) err(EX_IOERR, "poll"); + + if (fds[0].revents) readInput(); + if (fds[1].revents) readMessage(); + } +} |