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vip/vip.c
night0721 51688b6ad6
Handle SIGWINCH
2024-11-11 12:09:57 +00:00

1239 lines
28 KiB
C
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#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <stdarg.h>
#include <string.h>
#include <time.h>
#include <ctype.h>
#include <termios.h>
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>
#include <libgen.h>
#include <sys/wait.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <linux/limits.h>
#include "config.h"
struct termios newt, oldt;
int rows, cols;
editor_t editor[9];
int editor_idx = 0;
int editors = 0;
editor_t *cur_editor;
void draw_status_bar(void);
void refresh_screen(void);
void draw_rows(void);
void move_xy(int key);
void insert_char(int c);
void insert_new_line(void);
void shift_new_line(void);
void del_char(void);
void init_editor(char *filename);
char *prompt_editor(char *prompt, void (*callback)(char *, int));
void find_callback(char *query, int key);
void find_editor(void);
int readch(void);
void save_file(void);
void draw_rows(void);
void update_row(row_t *row);
void insert_row(int at, char *s, size_t len);
void del_row(int at);
char *export_buffer(int *buflen);
int is_separator(int c);
void update_highlight(row_t *row);
char *syntax_to_color(int hl, size_t *len);
void select_syntax(void);
void die(const char *s);
void cleanup(void);
void wpprintw(const char *fmt, ...);
void move_cursor(int row, int col);
int get_window_size(int *row, int *col);
void bprintf(const char *fmt, ...);
/*
* Draw status bar
* Like neovim's lualine
*/
void draw_status_bar(void)
{
move_cursor(rows - 1, 1);
/* Reverse and bold */
bprintf("\033[7m\033[1m");
int mode_len;
switch (cur_editor->mode) {
case NORMAL:
bprintf("%s NORMAL ", BLUE_BG);
mode_len = 8;
break;
case INSERT:
bprintf("%s INSERT ", GREEN_BG);
mode_len = 8;
break;
case COMMAND:
bprintf("%s COMMAND ", PEACH_BG);
mode_len = 9;
break;
case VISUAL:
bprintf("%s VISUAL ", MAUVE_BG);
mode_len = 8;
break;
}
/* Reset */
bprintf("\033[22m");
char git[80], file[80], info[80], lines[80], coord[80];
int git_len = snprintf(git, sizeof(git), " %s | %s ", "master", "+1");
int file_len = snprintf(file, sizeof(file), " %s %s",
strlen(cur_editor->filename) > 0 ? cur_editor->filename : "[No Name]", cur_editor->dirty ? "[+]" : "");
int info_len = snprintf(info, sizeof(info), " %s ", cur_editor->syntax ? cur_editor->syntax->filetype : "");
int lines_len;
if (cur_editor->rows == 0 || cur_editor->rows == cur_editor->y + 1) {
lines_len = snprintf(lines, sizeof(lines), " %s ", cur_editor->rows == 0 ? "Top" : "Bot");
} else {
lines_len = snprintf(lines, sizeof(lines), " %d%% ", ((cur_editor->y + 1) * 100 / cur_editor->rows));
}
int coord_len = snprintf(coord, sizeof(coord), " %d:%d ", cur_editor->y + 1, cur_editor->x + 1);
bprintf(SURFACE_1_BG); /* background */
/* text */
switch (cur_editor->mode) {
case NORMAL:
bprintf("%s", BLUE_FG);
break;
case INSERT:
bprintf("%s", GREEN_FG);
break;
case COMMAND:
bprintf("%s", PEACH_FG);
break;
case VISUAL:
bprintf("%s", MAUVE_FG);
break;
}
bprintf("%s%s%s%s", git, BLACK_BG, WHITE_FG, file);
while (file_len < cols) {
if (cols - mode_len - git_len - file_len == info_len + lines_len + coord_len) {
bprintf("%s%s", info, SURFACE_1_BG);
if (cur_editor->mode == NORMAL) {
bprintf(BLUE_FG);
} else if (cur_editor->mode == INSERT) {
bprintf(GREEN_FG);
} else if (cur_editor->mode == COMMAND) {
bprintf(PEACH_FG);
} else if (cur_editor->mode == VISUAL) {
bprintf(MAUVE_FG);
}
bprintf("%s", lines);
if (cur_editor->mode == NORMAL) {
bprintf(BLUE_BG);
} else if (cur_editor->mode == INSERT) {
bprintf(GREEN_BG);
} else if (cur_editor->mode == COMMAND) {
bprintf(PEACH_BG);
} else if (cur_editor->mode == VISUAL) {
bprintf(MAUVE_BG);
}
bprintf("%s\033[1m%s\033[22m", BLACK_FG, coord);
break;
} else {
bprintf(" ");
file_len++;
}
}
bprintf("\033[m");
}
void refresh_screen(void)
{
/* Scroll */
cur_editor->rx = 0;
if (cur_editor->y < cur_editor->rows) {
for (int i = 0; i < cur_editor->x; i++) {
if (cur_editor->row[cur_editor->y].chars[i] == '\t') {
cur_editor->rx += (TAB_SIZE - 1) - (cur_editor->rx % TAB_SIZE);
}
cur_editor->rx++;
}
}
if (cur_editor->y < cur_editor->rowoff) {
cur_editor->rowoff = cur_editor->y;
}
if (cur_editor->y >= cur_editor->rowoff + rows - 3) {
cur_editor->rowoff = cur_editor->y - rows + 3;
}
if (cur_editor->rx < cur_editor->coloff) {
cur_editor->coloff = cur_editor->rx;
}
if (cur_editor->rx >= cur_editor->coloff + cols) {
cur_editor->coloff = cur_editor->rx - cols + 1;
}
bprintf("\033H\033[2 q");
draw_rows();
draw_status_bar();
move_cursor((cur_editor->y - cur_editor->rowoff) + 1,
(cur_editor->rx - cur_editor->coloff) + 1);
}
void move_xy(int key)
{
row_t *row = cur_editor->y >= cur_editor->rows ? NULL : &cur_editor->row[cur_editor->y];
switch (key) {
case ARROW_LEFT:
if (cur_editor->x != 0) {
cur_editor->x--;
}
break;
case ARROW_RIGHT:
if (row && cur_editor->x < row->size) {
cur_editor->x++;
}
break;
case ARROW_UP:
if (cur_editor->y != 0) {
cur_editor->y--;
}
break;
case ARROW_DOWN:
if (cur_editor->y < cur_editor->rows) {
cur_editor->y++;
}
break;
}
/* Shifted row */
row = cur_editor->y >= cur_editor->rows ? NULL : &cur_editor->row[cur_editor->y];
int rowlen = row ? row->size : 0;
if (cur_editor->x > rowlen) {
cur_editor->x = rowlen;
}
}
void insert_char(int c)
{
row_t *row = &cur_editor->row[cur_editor->y];
if (cur_editor->y == cur_editor->rows) {
insert_row(cur_editor->rows, "", 0);
}
if (cur_editor->x < 0 || cur_editor->x > row->size) {
cur_editor->x = row->size;
}
/* Insert char in row */
row->chars = realloc(row->chars, row->size + 2);
memmove(&row->chars[cur_editor->x + 1], &row->chars[cur_editor->x], row->size - cur_editor->x + 1);
row->size++;
row->chars[cur_editor->x] = c;
update_row(row);
cur_editor->dirty++;
cur_editor->x++;
}
void insert_new_line(void)
{
if (cur_editor->x == 0) {
insert_row(cur_editor->y, "", 0);
} else {
row_t *row = &cur_editor->row[cur_editor->y];
insert_row(cur_editor->y + 1, &row->chars[cur_editor->x], row->size - cur_editor->x);
row = &cur_editor->row[cur_editor->y];
row->size = cur_editor->x;
row->chars[row->size] = '\0';
update_row(row);
}
cur_editor->y++;
cur_editor->x = 0;
}
/*
* 'O' in vim
*/
void shift_previous_line(void)
{
insert_row(cur_editor->y, "", 0);
cur_editor->x = 0;
}
/*
* 'o' in vim
*/
void shift_new_line(void)
{
insert_row(cur_editor->y + 1, "", 0);
cur_editor->y++;
cur_editor->x = 0;
}
void del_char(void)
{
if (cur_editor->y == cur_editor->rows) return;
if (cur_editor->x == 0 && cur_editor->y == 0) return;
row_t *row = &cur_editor->row[cur_editor->y];
if (cur_editor->x > 0) {
/* Delete char in row */
if (cur_editor->x - 1 < 0 || cur_editor->x - 1 >= row->size) return;
memmove(&row->chars[cur_editor->x - 1], &row->chars[cur_editor->x], row->size - cur_editor->x + 1);
row->size--;
update_row(row);
cur_editor->dirty++;
cur_editor->x--;
} else {
row_t *prev_row = &cur_editor->row[cur_editor->y - 1];
cur_editor->x = prev_row->size;
/* Append string to previous row */
prev_row->chars = realloc(prev_row->chars, prev_row->size + row->size + 1);
memcpy(&prev_row->chars[prev_row->size], row->chars, row->size);
prev_row->size += row->size;
prev_row->chars[prev_row->size] = '\0';
update_row(prev_row);
cur_editor->dirty++;
del_row(cur_editor->y);
cur_editor->y--;
}
}
void init_editor(char *filename)
{
if (editors > 8) {
wpprintw("%sOnly 9 tabs are allowed", ERROR);
readch();
wpprintw("");
return;
}
cur_editor = &editor[editors++];
cur_editor->x = 0;
cur_editor->y = 0;
cur_editor->rx = 0;
cur_editor->rowoff = 0;
cur_editor->coloff = 0;
cur_editor->rows = 0;
cur_editor->row = NULL;
cur_editor->dirty = 0;
cur_editor->mode = NORMAL;
cur_editor->syntax = NULL;
char cwd[PATH_MAX];
getcwd(cwd, PATH_MAX);
strcpy(cur_editor->cwd, cwd);
if (get_window_size(&rows, &cols) == -1) {
die("get_window_size");
}
if (filename) {
strcpy(cur_editor->filename, basename(filename));
FILE *fp = fopen(filename, "r");
if (!fp) {
die("fopen");
}
char *line = NULL;
size_t linecap = 0;
ssize_t len;
while ((len = getline(&line, &linecap, fp)) != -1) {
/* remove new line and carriage return at end of line */
while (len > 0 && (line[len - 1] == '\n' || line[len - 1] == '\r')) {
len--;
}
insert_row(cur_editor->rows, line, len);
}
select_syntax();
free(line);
fclose(fp);
/* Reset dirtiness as nothing is modified yet */
cur_editor->dirty = 0;
} else {
strcpy(cur_editor->filename, "");
}
}
char *prompt_editor(char *prompt, void (*callback)(char *, int))
{
size_t bufsize = 128;
char *buf = malloc(bufsize);
size_t buflen = 0;
int prompt_len = strlen(prompt);
buf[0] = '\0';
while (1) {
wpprintw(prompt, buf);
move_cursor(rows, prompt_len - 1 + strlen(buf));
int c = readch();
if (c == DEL_KEY || c == CTRL_KEY('h') || c == BACKSPACE) {
if (buflen != 0) {
buf[--buflen] = '\0';
}
} else if (c == '\033') {
wpprintw("");
cur_editor->mode = NORMAL;
if (callback) callback(buf, c);
free(buf);
return NULL;
} else if (c == '\r') {
if (buflen != 0) {
wpprintw("");
if (callback) callback(buf, c);
return buf;
}
} else if (!iscntrl(c) && c < 128) {
if (buflen == bufsize - 1) {
bufsize *= 2;
buf = realloc(buf, bufsize);
}
buf[buflen++] = c;
buf[buflen] = '\0';
}
if (callback) callback(buf, c);
}
}
void find_callback(char *query, int key)
{
static int last_match = -1;
static int direction = 1;
static int saved_hl_line;
static char *saved_hl = NULL;
if (saved_hl) {
memcpy(cur_editor->row[saved_hl_line].hl, saved_hl, cur_editor->row[saved_hl_line].render_size);
free(saved_hl);
saved_hl = NULL;
}
if (key == '\r' || key == '\033') {
last_match = -1;
direction = 1;
return;
} else if (key == CTRL_KEY('n')) {
direction = 1;
} else if (key == CTRL_KEY('p')) {
direction = -1;
} else {
last_match = -1;
direction = 1;
}
if (last_match == -1) direction = 1;
int current = last_match;
for (int i = 0; i < cur_editor->rows; i++) {
current += direction;
if (current == -1) current = cur_editor->rows - 1;
else if (current == cur_editor->rows) current = 0;
row_t *row = &cur_editor->row[current];
char *match = strstr(row->render, query);
if (match) {
last_match = current;
cur_editor->y = current;
int cur_rx = 0;
int x;
for (x = 0; x < row->size; x++) {
if (row->chars[x] == '\t') {
cur_rx += (TAB_SIZE - 1) - (cur_rx % TAB_SIZE);
}
cur_rx++;
if (cur_rx > match - row->render) {
cur_editor->x = x;
break;
}
}
cur_editor->rowoff = cur_editor->rows;
saved_hl_line = current;
saved_hl = malloc(row->render_size);
memcpy(saved_hl, row->hl, row->render_size);
memset(&row->hl[match - row->render], MATCH, strlen(query));
memset(&row->hl[match - row->render + strlen(query)], RESET, row->render_size - (match - row->render + strlen(query)));
break;
}
}
}
void find_editor(void)
{
int tmp_x = cur_editor->x;
int tmp_y = cur_editor->y;
int tmp_coloff = cur_editor->coloff;
int tmp_rowoff = cur_editor->rowoff;
char *query = prompt_editor("/%s", find_callback);
if (query) {
free(query);
} else {
cur_editor->x = tmp_x;
cur_editor->y = tmp_y;
cur_editor->coloff = tmp_coloff;
cur_editor->rowoff = tmp_rowoff;
}
}
int readch(void)
{
int nread;
char c;
while ((nread = read(STDIN_FILENO, &c, 1)) != 1) {
if (nread == -1 && errno != EAGAIN) {
die("read");
}
}
if (c == '\033') {
char seq[3];
if (read(STDIN_FILENO, &seq[0], 1) != 1)
return '\033';
if (read(STDIN_FILENO, &seq[1], 1) != 1)
return '\033';
if (seq[0] == '[') {
if (seq[1] >= '0' && seq[1] <= '9') {
if (read(STDIN_FILENO, &seq[2], 1) != 1)
return '\033';
if (seq[2] == '~') {
switch (seq[1]) {
case '1': return HOME_KEY;
case '3': return DEL_KEY;
case '4': return END_KEY;
case '5': return PAGE_UP;
case '6': return PAGE_DOWN;
case '7': return HOME_KEY;
case '8': return END_KEY;
}
}
} else {
switch (seq[1]) {
case 'A': return ARROW_UP;
case 'B': return ARROW_DOWN;
case 'C': return ARROW_RIGHT;
case 'D': return ARROW_LEFT;
case 'F': return END_KEY;
case 'H': return HOME_KEY;
}
}
} else if (seq[0] == 'O') {
switch (seq[1]) {
case 'F': return END_KEY;
case 'H': return HOME_KEY;
}
}
return '\033';
} else {
return c;
}
}
void save_file(void)
{
if (strlen(cur_editor->filename) == 0) {
char *new_filename = prompt_editor("Save as: %s", NULL);
if (new_filename == NULL) {
wpprintw("Save aborted");
return;
}
strcpy(cur_editor->filename, new_filename);
select_syntax();
}
int fd = open(cur_editor->filename, O_RDWR | O_CREAT, 0644);
if (fd != -1) {
int len;
char *buf = export_buffer(&len);
if (ftruncate(fd, len) != -1) {
if (write(fd, buf, len) == len) {
close(fd);
free(buf);
cur_editor->dirty = 0;
wpprintw("\"%s\" %dL, %dB written", cur_editor->filename, cur_editor->rows, len);
return;
}
free(buf);
}
close(fd);
}
wpprintw("Error saving: %s", strerror(errno));
}
void draw_rows(void)
{
for (int y = 0; y < rows - 1; y++) {
move_cursor(y + 1, 1);
int filerow = y + cur_editor->rowoff;
if (filerow >= cur_editor->rows) {
if (cur_editor->rows == 0 && y == rows / 2) {
char welcome[11];
snprintf(welcome, sizeof(welcome), "VIP v%s", VERSION);
/* Length of welcome message must be 10 */
int padding = (cols - 10) / 2;
while (padding--)
bprintf(" ");
bprintf(welcome);
}
} else {
int len = cur_editor->row[filerow].render_size - cur_editor->coloff;
if (len < 0) len = 0;
if (len > cols) len = cols;
char *c = &cur_editor->row[filerow].render[cur_editor->coloff];
unsigned char *hl = &cur_editor->row[filerow].hl[cur_editor->coloff];
char *current_color = malloc(COLOR_LEN * 2);
for (int j = 0; j < len; j++) {
if (iscntrl(c[j])) {
bprintf("\033[7m^%c\033[m", '@' + c[j]);
if (strncmp(current_color, WHITE_BG, COLOR_LEN)) {
bprintf(current_color);
}
} else if (hl[j] == NORMAL) {
if (strncmp(current_color, WHITE_BG, COLOR_LEN)) {
memcpy(current_color, WHITE_BG, COLOR_LEN);
bprintf(WHITE_BG);
}
bprintf("%c", c[j]);
} else {
size_t len;
char *color = syntax_to_color(hl[j], &len);
if (strncmp(current_color, color, len)) {
memcpy(current_color, color, len);
bprintf(color);
}
free(color);
bprintf("%c", c[j]);
}
}
free(current_color);
bprintf(WHITE_BG);
}
bprintf("\033[K");
}
}
void update_row(row_t *row)
{
int tabs = 0;
for (int j = 0; j < row->size; j++)
if (row->chars[j] == '\t') tabs++;
free(row->render);
row->render = malloc(row->size + tabs * (TAB_SIZE - 1) + 1);
int idx = 0;
for (int j = 0; j < row->size; j++) {
if (row->chars[j] == '\t') {
row->render[idx++] = ' ';
while (idx % TAB_SIZE != 0) {
row->render[idx++] = ' ';
}
}
else {
row->render[idx++] = row->chars[j];
}
}
row->render[idx] = '\0';
row->render_size = idx;
update_highlight(row);
}
void insert_row(int at, char *s, size_t len)
{
if (at < 0 || at > cur_editor->rows) return;
cur_editor->row = realloc(cur_editor->row, sizeof(row_t) * (cur_editor->rows + 1));
memmove(&cur_editor->row[at + 1], &cur_editor->row[at], sizeof(row_t) * (cur_editor->rows - at));
for (int j = at + 1; j <= cur_editor->rows; j++) {
cur_editor->row[j].idx++;
}
cur_editor->row[at].idx = at;
cur_editor->row[at].size = len;
cur_editor->row[at].chars = malloc(len + 1);
memcpy(cur_editor->row[at].chars, s, len);
cur_editor->row[at].chars[len] = '\0';
cur_editor->row[at].render_size = 0;
cur_editor->row[at].render = NULL;
cur_editor->row[at].hl = NULL;
cur_editor->row[at].opened_comment = 0;
update_row(&cur_editor->row[at]);
cur_editor->rows++;
cur_editor->dirty++;
}
void del_row(int at)
{
if (at < 0 || at >= cur_editor->rows) return;
/* Free row contents */
free(cur_editor->row[at].render);
free(cur_editor->row[at].chars);
free(cur_editor->row[at].hl);
memmove(&cur_editor->row[at], &cur_editor->row[at + 1], sizeof(row_t) * (cur_editor->rows - at - 1));
for (int j = at; j < cur_editor->rows - 1; j++) {
cur_editor->row[j].idx--;
}
cur_editor->rows--;
cur_editor->dirty++;
}
char *export_buffer(int *buflen)
{
int total_len = 0;
for (int j = 0; j < cur_editor->rows; j++) {
total_len += cur_editor->row[j].size + 1;
}
*buflen = total_len;
char *buf = malloc(total_len);
char *p = buf;
for (int j = 0; j < cur_editor->rows; j++) {
memcpy(p, cur_editor->row[j].chars, cur_editor->row[j].size);
p += cur_editor->row[j].size;
*p = '\n';
p++;
}
return buf;
}
int is_separator(int c)
{
return isspace(c) || c == '\0' || strchr(",.()+-/*=~%<>[];", c) != NULL;
}
void update_highlight(row_t *row)
{
row->hl = realloc(row->hl, row->render_size);
memset(row->hl, NORMAL, row->render_size);
if (cur_editor->syntax == NULL) return;
char **keywords = cur_editor->syntax->keywords;
char *scs = cur_editor->syntax->singleline_comment_start;
char *mcs = cur_editor->syntax->multiline_comment_start;
char *mce = cur_editor->syntax->multiline_comment_end;
int scs_len = scs ? strlen(scs) : 0;
int mcs_len = mcs ? strlen(mcs) : 0;
int mce_len = mce ? strlen(mce) : 0;
int prev_sep = 1;
int in_string = 0;
int in_comment = (row->idx > 0 && cur_editor->row[row->idx - 1].opened_comment);
int i = 0;
while (i < row->render_size) {
char c = row->render[i];
unsigned char prev_hl = (i > 0) ? row->hl[i - 1] : NORMAL;
if (scs_len && !in_string && !in_comment) {
if (!strncmp(&row->render[i], scs, scs_len)) {
memset(&row->hl[i], COMMENT, row->render_size - i);
break;
}
}
if (mcs_len && mce_len && !in_string) {
if (in_comment) {
row->hl[i] = MLCOMMENT;
if (!strncmp(&row->render[i], mce, mce_len)) {
memset(&row->hl[i], MLCOMMENT, mce_len);
i += mce_len;
in_comment = 0;
prev_sep = 1;
continue;
} else {
i++;
continue;
}
} else if (!strncmp(&row->render[i], mcs, mcs_len)) {
memset(&row->hl[i], MLCOMMENT, mcs_len);
i += mcs_len;
in_comment = 1;
continue;
}
}
if (cur_editor->syntax->flags & HL_STRINGS) {
if (in_string) {
row->hl[i] = STRING;
if (c == '\\' && i + 1 < row->render_size) {
row->hl[i + 1] = STRING;
i += 2;
continue;
}
if (c == in_string) in_string = 0;
i++;
prev_sep = 1;
continue;
} else {
if (c == '"') {
in_string = c;
row->hl[i] = STRING;
i++;
continue;
}
}
}
if (cur_editor->syntax->flags & HL_NUMBERS) {
if ((isdigit(c) && (prev_sep || prev_hl == NUMBER)) ||
(c == '.' && prev_hl == NUMBER)) {
row->hl[i] = NUMBER;
i++;
prev_sep = 0;
continue;
}
}
if (prev_sep) {
int j;
for (j = 0; keywords[j]; j++) {
int klen = strlen(keywords[j]);
int type_keyword = keywords[j][klen - 1] == '|';
if (type_keyword) klen--;
if (!strncmp(&row->render[i], keywords[j], klen) &&
is_separator(row->render[i + klen])) {
memset(&row->hl[i], type_keyword ? KEYWORD2 : KEYWORD1, klen);
i += klen;
break;
}
}
if (keywords[j] != NULL) {
prev_sep = 0;
continue;
}
}
prev_sep = is_separator(c);
i++;
}
int changed = (row->opened_comment != in_comment);
row->opened_comment = in_comment;
if (changed && row->idx + 1 < cur_editor->rows)
update_highlight(&cur_editor->row[row->idx + 1]);
}
char *syntax_to_color(int hl, size_t *len)
{
switch (hl) {
case NUMBER:
*len = COLOR_LEN;
return strdup(PEACH_BG);
case STRING:
*len = COLOR_LEN;
return strdup(GREEN_BG);
case COMMENT:
case MLCOMMENT:
*len = COLOR_LEN;
return strdup(OVERLAY_0_BG);
case KEYWORD1:
*len = COLOR_LEN;
return strdup(MAUVE_BG);
case KEYWORD2:
*len = COLOR_LEN;
return strdup(YELLOW_BG);
case MATCH:;
char *str = malloc(COLOR_LEN * 2 + 1);
snprintf(str, COLOR_LEN * 2 + 1, "%s%s", BLACK_BG, SKY_FG);
*len = COLOR_LEN * 2;
return str;
case RESET:;
char *res = malloc(COLOR_LEN * 2 + 1);
snprintf(res, COLOR_LEN * 2 + 1, "%s%s", WHITE_BG, BLACK_FG);
*len = COLOR_LEN * 2;
return res;
default:
*len = COLOR_LEN;
return strdup(WHITE_BG);
}
}
void select_syntax(void)
{
if (strlen(cur_editor->filename) == 0) return;
cur_editor->syntax = NULL;
char *ext = strrchr(cur_editor->filename, '.');
for (uint8_t i = 0; i < LANGS_LEN; i++) {
language_t *lang = &langs[i];
for (int j = 0; lang->extensions[j] != NULL; j++) {
int is_ext = lang->extensions[j][0] == '.';
if ((is_ext && ext && !strcmp(ext, lang->extensions[j])) ||
(!is_ext && strstr(cur_editor->filename, lang->extensions[j]))) {
cur_editor->syntax = lang;
for (int row = 0; row < cur_editor->rows; row++) {
update_highlight(&cur_editor->row[row]);
}
return;
}
}
}
}
void die(const char *s)
{
cleanup();
perror(s);
exit(1);
}
void handle_sigwinch(int ignore)
{
get_window_size(&rows, &cols);
if (cols < 80 || rows < 24) {
die("vip: Terminal size needs to be at least 80x24");
}
refresh_screen();
}
int main(int argc, char **argv)
{
struct sigaction sa;
sa.sa_handler = handle_sigwinch;
sa.sa_flags = SA_RESTART;
sigemptyset(&sa.sa_mask);
if (sigaction(SIGWINCH, &sa, NULL) == -1) {
perror("sigaction");
exit(1);
}
bprintf("\033[?1049h\033[2J\033[2q");
if (tcgetattr(STDIN_FILENO, &oldt) == -1) {
die("tcgetattr");
}
newt = oldt;
/* Disable canonical mode and echo */
newt.c_iflag &= ~(BRKINT | ICRNL | INPCK | ISTRIP | IXON);
newt.c_cflag |= (CS8);
newt.c_lflag &= ~(ECHO | ICANON | IEXTEN | ISIG);
newt.c_cc[VMIN] = 0;
newt.c_cc[VTIME] = 1;
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &newt) == -1) {
die("tcsetattr");
}
for (int i = 0; i < argc; i++) {
/* Create tabs for each arg */
init_editor(i == 0 ? NULL : argv[i]);
}
while (1) {
refresh_screen();
int c = readch();
switch (c) {
case '\r':
insert_new_line();
break;
case HOME_KEY:
cur_editor->x = 0;
break;
case END_KEY:
if (cur_editor->y < cur_editor->rows) {
cur_editor->x = cur_editor->row[cur_editor->y].size;
}
break;
case BACKSPACE:
case CTRL_KEY('h'):
case DEL_KEY:
if (cur_editor->mode == INSERT) {
if (c == DEL_KEY)
move_xy(ARROW_RIGHT);
del_char();
} else if (cur_editor->mode == NORMAL) {
move_xy(ARROW_LEFT);
}
break;
case PAGE_UP:
case PAGE_DOWN:
if (c == PAGE_UP) {
cur_editor->y = cur_editor->rowoff;
} else if (c == PAGE_DOWN) {
cur_editor->y = cur_editor->rowoff + rows - 1;
if (cur_editor->y > cur_editor->rows) cur_editor->y = cur_editor->rows;
}
int times = rows;
while (times--)
move_xy(c == PAGE_UP ? ARROW_UP : ARROW_DOWN);
break;
case ARROW_UP:
case ARROW_DOWN:
case ARROW_LEFT:
case ARROW_RIGHT:
if (cur_editor->mode == INSERT) {
move_xy(c);
}
break;
case CTRL_KEY('l'):
case '\033':
if (cur_editor->mode == INSERT) {
move_xy(ARROW_LEFT);
}
cur_editor->mode = NORMAL;
break;
case 'i': /* PASSTHROUGH */
if (cur_editor->mode == NORMAL) {
cur_editor->mode = INSERT;
break;
}
case 'v': /* PASSTHROUGH */
if (cur_editor->mode == NORMAL) {
cur_editor->mode = VISUAL;
break;
}
case 'g': /* PASSTHROUGH */
if (cur_editor->mode != INSERT) {
c = readch();
if (c == 'g') {
cur_editor->y = 0;
}
break;
}
case 'G': /* PASSTHROUGH */
if (cur_editor->mode != INSERT) {
cur_editor->y = cur_editor->rows - 1;
break;
}
case 'd': /* PASSTHROUGH */
if (cur_editor->mode != INSERT) {
c = readch();
if (c == 'd') {
del_row(cur_editor->y);
}
break;
}
case ':': /* PASSTHROUGH */
if (cur_editor->mode == NORMAL) {
cur_editor->mode = COMMAND;
draw_status_bar();
char *cmd = prompt_editor(":%s", NULL);
if (cmd == NULL) {
cur_editor->mode = NORMAL;
break;
}
if (cmd[0] == 'q') {
if (cmd[1] == '!') {
cleanup();
exit(0);
break;
} else {
if (cur_editor->dirty) {
wpprintw("%sNo write since last change for buffer \"%s\"", ERROR, cur_editor->filename);
cur_editor->mode = NORMAL;
break;
}
cleanup();
exit(0);
break;
}
} else if (cmd[0] == 'w') {
save_file();
cur_editor->mode = NORMAL;
break;
}
}
case '/': /* PASSTHROUGH */
if (cur_editor->mode == NORMAL) {
cur_editor->mode = COMMAND;
find_editor();
break;
}
case 'k': /* PASSTHROUGH */
if (cur_editor->mode != INSERT) {
move_xy(ARROW_UP);
break;
}
case 'j': /* PASSTHROUGH */
if (cur_editor->mode != INSERT) {
move_xy(ARROW_DOWN);
break;
}
case 'l': /* PASSTHROUGH */
if (cur_editor->mode != INSERT) {
move_xy(ARROW_RIGHT);
break;
}
case 'h': /* PASSTHROUGH */
if (cur_editor->mode != INSERT) {
move_xy(ARROW_LEFT);
break;
}
case 'O': /* PASSTHROUGH */
if (cur_editor->mode == NORMAL) {
shift_previous_line();
cur_editor->mode = INSERT;
break;
}
case 'o': /* PASSTHROUGH */
if (cur_editor->mode == NORMAL) {
shift_new_line();
cur_editor->mode = INSERT;
break;
}
case '0': /* PASSTHROUGH */
if (cur_editor->mode == NORMAL) {
cur_editor->x = 0;
break;
}
case '$': /* PASSTHROUGH */
if (cur_editor->mode == NORMAL) {
cur_editor->x = cur_editor->row[cur_editor->y].size;
break;
}
case ' ': /* PASSTHROUGH */
if (cur_editor->mode == NORMAL) {
c = readch();
if (c == 'p') {
c = readch();
if (c == 'v') {
pid_t pid = fork();
if (pid == 0) {
/* Child process */
execlp("ccc", "ccc", cur_editor->cwd, "-p", NULL);
_exit(1); /* Exit if exec fails */
} else if (pid > 0) {
/* Parent process */
waitpid(pid, NULL, 0);
FILE *f = fopen("/home/night/.cache/ccc/opened_file", "r");
char opened_file[PATH_MAX];
fread(opened_file, sizeof(char), PATH_MAX, f);
opened_file[strcspn(opened_file, "\n")] = 0;
init_editor(opened_file);
} else {
/* Fork failed */
}
}
}
break;
}
default:
if (cur_editor->mode == INSERT) {
insert_char(c);
}
break;
}
}
cleanup();
return 0;
}
void cleanup(void)
{
/* Restore old terminal settings */
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &oldt) == -1) {
die("tcsetattr");
}
bprintf("\033[2J\033[?1049l");
}
/*
* Print line to the panel
*/
void wpprintw(const char *fmt, ...)
{
char buffer[cols];
va_list args;
va_start(args, fmt);
vsnprintf(buffer, sizeof(buffer), fmt, args);
va_end(args);
move_cursor(rows, 1);
/* Clear line and print formatted string */
bprintf("\033[K%s\033[0m", buffer);
}
void move_cursor(int row, int col)
{
bprintf("\033[%d;%dH", row, col);
}
int get_window_size(int *row, int *col)
{
struct winsize ws;
if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 || ws.ws_col == 0) {
/* Can't get window size */
bprintf("\033[999C\033[999B");
char buf[32];
unsigned int i = 0;
bprintf("\033[6n");
while (i < sizeof(buf) - 1) {
if (read(STDIN_FILENO, &buf[i], 1) != 1) {
break;
}
if (buf[i] == 'R') {
break;
}
i++;
}
buf[i] = '\0';
if (buf[0] != '\033' || buf[1] != '[') {
return -1;
}
if (sscanf(&buf[2], "%d;%d", row, col) != 2) {
return -1;
}
return 0;
} else {
*col = ws.ws_col;
*row = ws.ws_row;
return 0;
}
}
/*
* printf, but write to STDOUT_FILENO
*/
void bprintf(const char *fmt, ...)
{
char buffer[512];
va_list args;
va_start(args, fmt);
vsnprintf(buffer, sizeof(buffer), fmt, args);
va_end(args);
write(STDOUT_FILENO, buffer, strlen(buffer));
}
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