Make text viewable and make a bar at bottom of screen
This commit is contained in:
parent
50fbc03e20
commit
171a43d2ac
GPG key ID:
957D67B8DB7A119B
7 changed files with 383 additions and 115 deletions
4
Makefile
4
Makefile
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@ -8,9 +8,9 @@ PREFIX ?= /usr/local
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BINDIR = $(PREFIX)/bin
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# Flags
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CFLAGS = -O3 -march=native -mtune=native -pipe -s -std=c99 -pedantic -Wall -D_DEFAULT_SOURCE -D_XOPEN_SOURCE=600
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CFLAGS = -O3 -march=native -mtune=native -pipe -s -flto -std=c99 -pedantic -Wall -D_DEFAULT_SOURCE -D_XOPEN_SOURCE=600
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SRC = vip.c
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SRC = vip.c term.c bar.c
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$(TARGET): $(SRC)
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$(CC) $(SRC) -o $@ $(CFLAGS)
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49
bar.c
Normal file
49
bar.c
Normal file
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@ -0,0 +1,49 @@
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#include <stdio.h>
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#include <stdarg.h>
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#include <string.h>
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#include <time.h>
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#include "vip.h"
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extern editor vip;
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void draw_status_bar(struct abuf *ab)
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{
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abAppend(ab, "\x1b[7m", 4);
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char status[80], rstatus[80];
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int len = snprintf(status, sizeof(status), "NORMAL | %.20s",
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vip.filename ? vip.filename : "[No Name]");
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int rlen = snprintf(rstatus, sizeof(rstatus), "%dL | %d:%d", vip.rows,
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vip.cy + 1, vip.rx + 1);
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if (len > vip.screencols) len = vip.screencols;
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abAppend(ab, status, len);
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while (len < vip.screencols) {
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if (vip.screencols - len == rlen) {
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abAppend(ab, rstatus, rlen);
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break;
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} else {
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abAppend(ab, " ", 1);
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len++;
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}
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}
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abAppend(ab, "\x1b[m", 3);
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abAppend(ab, "\r\n", 2);
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}
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void draw_message_bar(struct abuf *ab)
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{
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abAppend(ab, "\x1b[K", 3);
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int msglen = strlen(vip.statusmsg);
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if (msglen > vip.screencols) msglen = vip.screencols;
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if (msglen && time(NULL) - vip.statusmsg_time < 5)
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abAppend(ab, vip.statusmsg, msglen);
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}
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void set_status_bar_message(const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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vsnprintf(vip.statusmsg, sizeof(vip.statusmsg), fmt, ap);
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va_end(ap);
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vip.statusmsg_time = time(NULL);
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}
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8
bar.h
Normal file
8
bar.h
Normal file
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@ -0,0 +1,8 @@
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#ifndef BAR_H_
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#define BAR_H_
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void draw_status_bar(struct abuf *ab);
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void draw_message_bar(struct abuf *ab);
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void set_status_bar_message(const char *fmt, ...);
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#endif
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89
term.c
Normal file
89
term.c
Normal file
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@ -0,0 +1,89 @@
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#include <stdio.h>
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#include <stdlib.h>
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#include <termios.h>
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#include <unistd.h>
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#include <sys/ioctl.h>
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#include "vip.h"
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extern editor vip;
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void die(const char *s)
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{
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write(STDOUT_FILENO, "\x1b[2J", 4);
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write(STDOUT_FILENO, "\x1b[H", 3);
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perror(s);
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exit(1);
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}
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void reset_term()
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{
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if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &vip.termios) == -1) {
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die("tcsetattr");
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}
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}
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/*
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* Setup terminal
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*/
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void setup_term()
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{
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if (tcgetattr(STDIN_FILENO, &vip.termios) == -1) {
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die("tcgetattr");
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}
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atexit(reset_term);
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struct termios raw = vip.termios;
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/* disbable echo, line output and signals */
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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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}
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int get_cursor_position(int *rows, int *cols)
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{
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char buf[32];
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unsigned int i = 0;
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if (write(STDOUT_FILENO, "\x1b[6n", 4) != 4) {
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return -1;
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}
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while (i < sizeof(buf) - 1) {
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if (read(STDIN_FILENO, &buf[i], 1) != 1) {
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break;
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}
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if (buf[i] == 'R') {
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break;
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}
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i++;
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}
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buf[i] = '\0';
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if (buf[0] != '\x1b' || buf[1] != '[') {
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return -1;
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}
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if (sscanf(&buf[2], "%d;%d", rows, cols) != 2) {
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return -1;
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}
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return 0;
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}
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int get_window_size(int *rows, int *cols)
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{
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struct winsize ws;
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if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 || ws.ws_col == 0) {
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/* Can't get window size */
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if (write(STDOUT_FILENO, "\x1b[999C\x1b[999B", 12) != 12) {
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return -1;
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}
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return get_cursor_position(rows, cols);
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} else {
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*cols = ws.ws_col;
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*rows = ws.ws_row;
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return 0;
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}
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}
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10
term.h
Normal file
10
term.h
Normal file
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@ -0,0 +1,10 @@
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#ifndef TERM_H_
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#define TERM_H_
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void die(const char *s);
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void reset_term();
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void setup_term();
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int get_cursor_position(int *rows, int *cols);
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int get_window_size(int *rows, int *cols);
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#endif
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276
vip.c
276
vip.c
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@ -3,11 +3,14 @@
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#include <string.h>
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#include <ctype.h>
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#include <errno.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 <sys/ioctl.h>
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#include <sys/types.h>
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#define VERSION "0.0.1"
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#include "vip.h"
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#include "term.h"
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#include "bar.h"
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#define CTRL_KEY(k) ((k) & 0x1f)
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@ -23,52 +26,16 @@ enum editorKey {
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PAGE_DOWN
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};
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struct editor_config {
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int cx, cy; /* cursor x, y*/
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int screenrows, screencols;
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struct termios orig_termios;
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};
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struct editor_config config;
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void die(const char *s)
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{
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write(STDOUT_FILENO, "\x1b[2J", 4);
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write(STDOUT_FILENO, "\x1b[H", 3);
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perror(s);
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exit(1);
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}
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void disable_raw_mode()
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{
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if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &config.orig_termios) == -1)
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die("tcsetattr");
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}
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void enable_raw_mode()
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{
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if (tcgetattr(STDIN_FILENO, &config.orig_termios) == -1)
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die("tcgetattr");
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atexit(disable_raw_mode);
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struct termios raw = config.orig_termios;
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/* disbable echo, line output and signals */
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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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editor vip;
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int read_key()
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{
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int nread;
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char c;
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while ((nread = read(STDIN_FILENO, &c, 1)) != 1) {
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if (nread == -1 && errno != EAGAIN) die("read");
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if (nread == -1 && errno != EAGAIN) {
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die("read");
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}
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}
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if (c == 'k') return ARROW_UP;
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if (c == 'j') return ARROW_DOWN;
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@ -78,12 +45,15 @@ int read_key()
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if (c == '\x1b') {
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char seq[3];
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if (read(STDIN_FILENO, &seq[0], 1) != 1) return '\x1b';
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if (read(STDIN_FILENO, &seq[1], 1) != 1) return '\x1b';
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if (read(STDIN_FILENO, &seq[0], 1) != 1)
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return '\x1b';
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if (read(STDIN_FILENO, &seq[1], 1) != 1)
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return '\x1b';
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if (seq[0] == '[') {
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if (seq[1] >= '0' && seq[1] <= '9') {
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if (read(STDIN_FILENO, &seq[2], 1) != 1) return '\x1b';
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if (read(STDIN_FILENO, &seq[2], 1) != 1)
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return '\x1b';
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if (seq[2] == '~') {
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switch (seq[1]) {
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case '1': return HOME_KEY;
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@ -117,46 +87,79 @@ int read_key()
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}
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}
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int get_cursor_position(int *rows, int *cols)
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int row_cx_to_rx(row *row, int cx)
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{
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char buf[32];
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unsigned int i = 0;
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if (write(STDOUT_FILENO, "\x1b[6n", 4) != 4)
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return -1;
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while (i < sizeof(buf) - 1) {
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if (read(STDIN_FILENO, &buf[i], 1) != 1)
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break;
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if (buf[i] == 'R')
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break;
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i++;
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int rx = 0;
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for (int j = 0; j < cx; j++) {
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if (row->chars[j] == '\t') {
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rx += (TAB_SIZE - 1) - (rx % TAB_SIZE);
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}
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buf[i] = '\0';
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if (buf[0] != '\x1b' || buf[1] != '[')
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return -1;
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if (sscanf(&buf[2], "%d;%d", rows, cols) != 2)
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return -1;
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return 0;
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rx++;
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}
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return rx;
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}
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int get_window_size(int *rows, int *cols)
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void update_row(row *row)
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{
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struct winsize ws;
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if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 || ws.ws_col == 0) {
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if (write(STDOUT_FILENO, "\x1b[999C\x1b[999B", 12) != 12) return -1;
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return get_cursor_position(rows, cols);
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} else {
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*cols = ws.ws_col;
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*rows = ws.ws_row;
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return 0;
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int tabs = 0;
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for (int j = 0; j < row->size; j++)
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if (row->chars[j] == '\t') tabs++;
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free(row->render);
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row->render = malloc(row->size + tabs * (TAB_SIZE - 1) + 1);
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int idx = 0;
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for (int j = 0; j < row->size; j++) {
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if (row->chars[j] == '\t') {
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row->render[idx++] = ' ';
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while (idx % TAB_SIZE != 0) {
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row->render[idx++] = ' ';
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}
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}
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else {
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row->render[idx++] = row->chars[j];
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}
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}
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row->render[idx] = '\0';
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row->render_size = idx;
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}
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struct abuf {
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char *b;
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int len;
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};
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void append_row(char *s, size_t len)
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{
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vip.row = realloc(vip.row, sizeof(row) * (vip.rows + 1));
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#define ABUF_INIT {NULL, 0}
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int at = vip.rows;
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vip.row[at].size = len;
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vip.row[at].chars = malloc(len + 1);
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memcpy(vip.row[at].chars, s, len);
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vip.row[at].chars[len] = '\0';
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vip.row[at].render_size = 0;
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vip.row[at].render = NULL;
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update_row(&vip.row[at]);
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vip.rows++;
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}
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void open_editor(char *filename)
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{
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free(vip.filename);
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vip.filename = strdup(filename);
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FILE *fp = fopen(filename, "r");
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if (!fp) {
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die("fopen");
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}
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char *line = NULL;
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size_t linecap = 0;
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ssize_t len;
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while ((len = getline(&line, &linecap, fp)) != -1) {
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/* remove new line and carriage return at end of line */
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while (len > 0 && (line[len - 1] == '\n' || line[len - 1] == '\r')) {
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len--;
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}
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append_row(line, len);
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}
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free(line);
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fclose(fp);
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}
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void abAppend(struct abuf *ab, const char *s, int len)
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{
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@ -172,14 +175,38 @@ void abFree(struct abuf *ab)
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free(ab->b);
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}
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void draw_rows(struct abuf *ab) {
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for (int y = 0; y < config.screenrows; y++) {
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if (y == config.screenrows / 3) {
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char welcome[80];
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void scroll()
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{
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vip.rx = 0;
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if (vip.cy < vip.rows) {
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vip.rx = row_cx_to_rx(&vip.row[vip.cy], vip.cx);
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}
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if (vip.cy < vip.rowoff) {
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vip.rowoff = vip.cy;
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}
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if (vip.cy >= vip.rowoff + vip.screenrows) {
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vip.rowoff = vip.cy - vip.screenrows + 1;
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}
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if (vip.rx < vip.coloff) {
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vip.coloff = vip.rx;
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}
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if (vip.rx >= vip.coloff + vip.screencols) {
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vip.coloff = vip.rx - vip.screencols + 1;
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}
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}
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void draw_rows(struct abuf *ab)
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{
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for (int y = 0; y < vip.screenrows; y++) {
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int filerow = y + vip.rowoff;
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if (filerow >= vip.rows) {
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if (vip.rows == 0 && y == vip.screenrows / 3) {
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char welcome[11];
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int welcomelen = snprintf(welcome, sizeof(welcome),
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"VIP v%s", VERSION);
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if (welcomelen > config.screencols) welcomelen = config.screencols;
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int padding = (config.screencols - welcomelen) / 2;
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if (welcomelen > vip.screencols)
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welcomelen = vip.screencols;
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int padding = (vip.screencols - welcomelen) / 2;
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if (padding) {
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abAppend(ab, "~", 1);
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padding--;
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@ -188,25 +215,35 @@ void draw_rows(struct abuf *ab) {
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abAppend(ab, welcome, welcomelen);
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} else {
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abAppend(ab, "~", 1);
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} abAppend(ab, "\x1b[K", 3);
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if (y < config.screenrows - 1) {
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abAppend(ab, "\r\n", 2);
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}
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} else {
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int len = vip.row[filerow].render_size - vip.coloff;
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if (len < 0) len = 0;
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if (len > vip.screencols) len = vip.screencols;
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abAppend(ab, &vip.row[filerow].render[vip.coloff], len);
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}
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abAppend(ab, "\x1b[K", 3);
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abAppend(ab, "\r\n", 2);
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}
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}
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void refresh_screen()
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{
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scroll();
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struct abuf ab = ABUF_INIT;
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abAppend(&ab, "\x1b[?25l", 6);
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abAppend(&ab, "\x1b[H", 3);
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draw_rows(&ab);
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draw_status_bar(&ab);
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draw_message_bar(&ab);
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char buf[32];
|
||||
snprintf(buf, sizeof(buf), "\x1b[%d;%dH", config.cy + 1, config.cx + 1);
|
||||
snprintf(buf, sizeof(buf), "\x1b[%d;%dH", (vip.cy - vip.rowoff) + 1,
|
||||
(vip.rx - vip.coloff) + 1);
|
||||
abAppend(&ab, buf, strlen(buf));
|
||||
|
||||
abAppend(&ab, "\x1b[?25h", 6);
|
||||
|
|
@ -215,29 +252,36 @@ void refresh_screen()
|
|||
abFree(&ab);
|
||||
}
|
||||
|
||||
void move_cursor(int key) {
|
||||
void move_cursor(int key)
|
||||
{
|
||||
row *row = (vip.cy >= vip.rows) ? NULL : &vip.row[vip.cy];
|
||||
switch (key) {
|
||||
case ARROW_LEFT:
|
||||
if (config.cx != 0) {
|
||||
config.cx--;
|
||||
if (vip.cx != 0) {
|
||||
vip.cx--;
|
||||
}
|
||||
break;
|
||||
case ARROW_RIGHT:
|
||||
if (config.cx != config.screencols - 1) {
|
||||
config.cx++;
|
||||
if (row && vip.cx < row->size) {
|
||||
vip.cx++;
|
||||
}
|
||||
break;
|
||||
case ARROW_UP:
|
||||
if (config.cy != 0) {
|
||||
config.cy--;
|
||||
if (vip.cy != 0) {
|
||||
vip.cy--;
|
||||
}
|
||||
break;
|
||||
case ARROW_DOWN:
|
||||
if (config.cy != config.screenrows - 1) {
|
||||
config.cy++;
|
||||
if (vip.cy < vip.rows) {
|
||||
vip.cy++;
|
||||
}
|
||||
break;
|
||||
}
|
||||
row = (vip.cy >= vip.rows) ? NULL : &vip.row[vip.cy];
|
||||
int rowlen = row ? row->size : 0;
|
||||
if (vip.cx > rowlen) {
|
||||
vip.cx = rowlen;
|
||||
}
|
||||
}
|
||||
|
||||
void process_key()
|
||||
|
|
@ -251,15 +295,23 @@ void process_key()
|
|||
break;
|
||||
|
||||
case HOME_KEY:
|
||||
config.cx = 0;
|
||||
vip.cx = 0;
|
||||
break;
|
||||
case END_KEY:
|
||||
config.cx = config.screencols - 1;
|
||||
if (vip.cy < vip.rows) {
|
||||
vip.cx = vip.row[vip.cy].size;
|
||||
}
|
||||
break;
|
||||
case PAGE_UP:
|
||||
case PAGE_DOWN:
|
||||
{
|
||||
int times = config.screenrows;
|
||||
if (c == PAGE_UP) {
|
||||
vip.cy = vip.rowoff;
|
||||
} else if (c == PAGE_DOWN) {
|
||||
vip.cy = vip.rowoff + vip.screenrows - 1;
|
||||
if (vip.cy > vip.rows) vip.cy = vip.rows;
|
||||
}
|
||||
int times = vip.screenrows;
|
||||
while (times--)
|
||||
move_cursor(c == PAGE_UP ? ARROW_UP : ARROW_DOWN);
|
||||
}
|
||||
|
|
@ -276,16 +328,32 @@ void process_key()
|
|||
|
||||
void init_editor()
|
||||
{
|
||||
config.cx = 0;
|
||||
config.cy = 0;
|
||||
if (get_window_size(&config.screenrows, &config.screencols) == -1)
|
||||
vip.cx = 0;
|
||||
vip.cy = 0;
|
||||
vip.rx = 0;
|
||||
vip.rowoff = 0;
|
||||
vip.coloff = 0;
|
||||
vip.rows = 0;
|
||||
vip.row = NULL;
|
||||
vip.filename = NULL;
|
||||
vip.statusmsg[0] = '\0';
|
||||
vip.statusmsg_time = 0;
|
||||
|
||||
if (get_window_size(&vip.screenrows, &vip.screencols) == -1) {
|
||||
die("get_window_size");
|
||||
}
|
||||
vip.screenrows -= 2;
|
||||
}
|
||||
|
||||
int main()
|
||||
int main(int argc, char **argv)
|
||||
{
|
||||
enable_raw_mode();
|
||||
setup_term();
|
||||
init_editor();
|
||||
if (argc >= 2) {
|
||||
open_editor(argv[1]);
|
||||
}
|
||||
|
||||
set_status_bar_message("Ctrl-Q = Quit");
|
||||
|
||||
while (1) {
|
||||
refresh_screen();
|
||||
|
|
|
|||
44
vip.h
Normal file
44
vip.h
Normal file
|
|
@ -0,0 +1,44 @@
|
|||
#ifndef VIP_H_
|
||||
#define VIP_H_
|
||||
|
||||
#include <termios.h>
|
||||
#include <time.h>
|
||||
|
||||
/* CONFIG */
|
||||
#define TAB_SIZE 4
|
||||
|
||||
#define VERSION "0.0.1"
|
||||
|
||||
typedef struct row {
|
||||
int size;
|
||||
int render_size;
|
||||
char *chars;
|
||||
char *render;
|
||||
} row;
|
||||
|
||||
typedef struct editor {
|
||||
int cx, cy; /* chars x, y */
|
||||
int rx; /* render x, y */
|
||||
int rowoff;
|
||||
int coloff;
|
||||
int screenrows, screencols;
|
||||
int rows;
|
||||
row *row;
|
||||
char *filename;
|
||||
char statusmsg[80];
|
||||
time_t statusmsg_time;
|
||||
struct termios termios;
|
||||
} editor;
|
||||
|
||||
struct abuf {
|
||||
char *b;
|
||||
int len;
|
||||
};
|
||||
|
||||
#define ABUF_INIT { NULL, 0 }
|
||||
|
||||
void abAppend(struct abuf *ab, const char *s, int len);
|
||||
|
||||
extern editor vip;
|
||||
|
||||
#endif
|
||||
Loading…
Reference in a new issue