initial
This commit is contained in:
commit
0f0892c1a8
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CFLAGS=-Wall -Wextra -pedantic -std=c99
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CC=gcc
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AR=ar
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default:
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@echo "to make static library: make static"
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@echo "to make shared library: make shared"
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static: tui.a
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shared: tui.so
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tui.a: tui_st.o
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$(AR) rcs $@ $<
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tui_st.o: tui.c tui.h
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$(CC) $(CFLAGS) -c -o $@ tui.c
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tui.so: tui_sh.o
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$(CC) -shared -o $@ $<
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tui_sh.o: tui.c tui.h
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$(CC) $(CFLAGS) -fPIC -c -o $@ tui.c
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.PHONY: clean
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clean:
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rm -f *.o *.so *.a
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/ioctl.h>
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#include <termios.h>
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#include <unistd.h>
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#include "tui.h"
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static struct termios orig_termios;
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static const struct cell empty_cell = {
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' ',
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TUI_DEFAULT_FG,
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TUI_DEFAULT_BG
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};
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/* global cell buffer */
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struct cell_buffer stdscr = {
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NULL,
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-1, /* uninitialized */
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-1
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};
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static void
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die(const char *s)
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{
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perror(s);
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exit(1);
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}
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static void
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tui_disable_raw_mode()
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{
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if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &orig_termios) == -1)
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die("tcsetattr");
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}
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static void
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tui_enable_raw_mode()
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{
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if (tcgetattr(STDIN_FILENO, &orig_termios) == -1)
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die("tcgetattr");
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struct termios raw = orig_termios;
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raw.c_iflag &= ~(BRKINT | ICRNL | INPCK | ISTRIP | IXON);
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raw.c_oflag &= ~(OPOST);
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raw.c_cflag |= (CS8);
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raw.c_lflag &= ~(ECHO | ICANON | IEXTEN | ISIG);
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raw.c_cc[VMIN] = 0;
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raw.c_cc[VTIME] = 1;
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if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &raw) == -1)
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die("tcsetattr");
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}
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static void
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get_window_size(int *height, int *width)
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{
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struct winsize ws;
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ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws);
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if (height != NULL)
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*height = ws.ws_row;
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if (width != NULL)
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*width = ws.ws_col;
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}
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static void
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init_cell_buffer(struct cell_buffer *cb)
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{
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long ncells = cb->width * cb->height;
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cb->cells = malloc(ncells * sizeof(struct cell));
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for (long i = 0; i < ncells; i++)
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cb->cells[i] = empty_cell;
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}
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/****************************************************/
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void
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tui_init()
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{
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tui_enable_raw_mode();
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get_window_size(&stdscr.height, &stdscr.width);
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init_cell_buffer(&stdscr);
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struct cell a = {
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'#',
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TUI_BLACK,
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TUI_WHITE
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};
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tui_clear(&stdscr, empty_cell);
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tui_clear(&stdscr, a);
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tui_refresh(&stdscr);
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}
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void
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tui_shutdown()
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{
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tui_disable_raw_mode();
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}
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int
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tui_width()
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{
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int width;
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get_window_size(NULL, &width);
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return width;
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}
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int
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tui_height()
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{
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int height;
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get_window_size(&height, NULL);
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return height;
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}
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void
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tui_refresh(struct cell_buffer *cb)
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{
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for (int y = 0; y < cb->height; y++) {
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for (int x = 0; x < cb->width; x++) {
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// currently doesn't handle cell's fg and bg
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long current_cell = x + y * cb->width;
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fprintf(stderr,
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"\033[mCell number %ld, fg: %d, bg: %d\r\n",
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current_cell,
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cb->cells[current_cell].fg,
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cb->cells[current_cell].bg);
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printf("\033[%d;%dm",
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cb->cells[current_cell].fg + 29,
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cb->cells[current_cell].bg + 39);
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byte buffer[1];
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buffer[0] = cb->cells[current_cell].ch;
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write(STDOUT_FILENO, buffer, 1);
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}
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write(STDOUT_FILENO, "\r\n", 2);
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}
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}
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void
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tui_clear(struct cell_buffer *cb, struct cell clear_cell)
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{
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long ncells = cb->width * cb->height;
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for (long i = 0; i < ncells; i++) {
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cb->cells[i] = clear_cell;
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}
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}
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void
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tui_set_cell(struct cell_buffer *cb, int x, int y, struct cell c)
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{
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if (x < 0 || y < 0 || x > cb->width || y > cb->height)
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return;
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cb->cells[x + y * cb->width] = c;
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}
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@ -0,0 +1,92 @@
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#ifndef TUI_H
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#define TUI_H
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#include <stdint.h>
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#define TUI_DEFAULT 0x00
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#define TUI_BLACK 0x01
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#define TUI_RED 0x02
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#define TUI_GREEN 0x03
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#define TUI_YELLOW 0x04
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#define TUI_BLUE 0x05
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#define TUI_MAGENTA 0x06
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#define TUI_CYAN 0x07
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#define TUI_WHITE 0x08
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#define TUI_DEFAULT_FG TUI_DEFAULT
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#define TUI_DEFAULT_BG TUI_BLACK
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#define TUI_KEY_CTRL_TILDE 0x00
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#define TUI_KEY_CTRL_2 0x00
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#define TUI_KEY_CTRL_A 0x01
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#define TUI_KEY_CTRL_B 0x02
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#define TUI_KEY_CTRL_C 0x03
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#define TUI_KEY_CTRL_D 0x04
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#define TUI_KEY_CTRL_E 0x05
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#define TUI_KEY_CTRL_F 0x06
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#define TUI_KEY_CTRL_G 0x07
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#define TUI_KEY_BACKSPACE 0x08
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#define TUI_KEY_CTRL_H 0x08
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#define TUI_KEY_TAB 0x09
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#define TUI_KEY_CTRL_I 0x09
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#define TUI_KEY_CTRL_J 0x0A
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#define TUI_KEY_CTRL_K 0x0B
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#define TUI_KEY_CTRL_L 0x0C
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#define TUI_KEY_ENTER 0x0D
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#define TUI_KEY_CTRL_M 0x0D
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#define TUI_KEY_CTRL_N 0x0E
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#define TUI_KEY_CTRL_O 0x0F
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#define TUI_KEY_CTRL_P 0x10
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#define TUI_KEY_CTRL_Q 0x11
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#define TUI_KEY_CTRL_R 0x12
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#define TUI_KEY_CTRL_S 0x13
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#define TUI_KEY_CTRL_T 0x14
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#define TUI_KEY_CTRL_U 0x15
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#define TUI_KEY_CTRL_V 0x16
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#define TUI_KEY_CTRL_W 0x17
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#define TUI_KEY_CTRL_X 0x18
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#define TUI_KEY_CTRL_Y 0x19
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#define TUI_KEY_CTRL_Z 0x1A
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#define TUI_KEY_ESC 0x1B
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#define TUI_KEY_CTRL_LSQ_BRACKET 0x1B
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#define TUI_KEY_CTRL_3 0x1B
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#define TUI_KEY_CTRL_4 0x1C
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#define TUI_KEY_CTRL_BACKSLASH 0x1C
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#define TUI_KEY_CTRL_5 0x1D
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#define TUI_KEY_CTRL_RSQ_BRACKET 0x1D
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#define TUI_KEY_CTRL_6 0x1E
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#define TUI_KEY_CTRL_7 0x1F
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#define TUI_KEY_CTRL_SLASH 0x1F
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#define TUI_KEY_CTRL_UNDERSCORE 0x1F
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#define TUI_KEY_SPACE 0x20
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#define TUI_KEY_BACKSPACE2 0x7F
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#define TUI_KEY_CTRL_8 0x7F
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#define TUI_CTRL_KEY(k) ((k) & 0x1f)
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typedef unsigned char byte;
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struct cell {
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byte ch; // ascii only
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uint16_t fg;
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uint16_t bg;
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};
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struct cell_buffer {
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struct cell *cells;
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int height;
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int width;
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};
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void tui_init();
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void tui_shutdown();
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int tui_width();
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int tui_height();
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void tui_refresh();
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void tui_clear();
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void tui_set_cell();
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#endif /* TUI_H */
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