hadeed/kilo
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Get window size

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Hadeed 2023-08-24 16:09:03 +05:00
parent 2ded534ff7
commit 9d5d4ea8c5
1 changed files with 37 additions and 12 deletions
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49
kilo.c
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@ -1,30 +1,34 @@
#include <errno.h> #include <errno.h>
#include <stdio.h> #include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
#include <sys/ioctl.h>
#include <termios.h> #include <termios.h>
#include <unistd.h> #include <unistd.h>
void enable_raw_mode(); void enable_raw_mode();
void disable_raw_mode(); void disable_raw_mode();
int get_window_size(int *, int *);
void editor_init();
void editor_redraw_screen(); void editor_redraw_screen();
void editor_clear_screen(); void editor_clear_screen();
void editor_draw_rows(); void editor_draw_rows();
void editor_process_key(); void editor_process_key();
void die(const char *s); void die(const char *);
#define CTRL_KEY(key) ((key) & 0x1f) #define CTRL_KEY(key) ((key) & 0x1f)
struct termios orig_termios; struct {
struct termios orig_termios;
int rows;
int cols;
} E;
int main() { int main() {
if (!isatty(STDIN_FILENO)) { editor_init();
printf("kilo only supports a terminal at standard in. Exiting.");
exit(1);
}
enable_raw_mode(); enable_raw_mode();
while (1) { while (1) {
editor_redraw_screen(); editor_redraw_screen();
editor_process_key(); editor_process_key();
@ -34,20 +38,42 @@ int main() {
} }
void enable_raw_mode() { void enable_raw_mode() {
if (tcgetattr(STDIN_FILENO, &orig_termios) == -1) die("tcgetattr"); if (tcgetattr(STDIN_FILENO, &E.orig_termios) == -1) die("tcgetattr");
atexit(disable_raw_mode); atexit(disable_raw_mode);
struct termios raw = orig_termios; struct termios raw = E.orig_termios;
cfmakeraw(&raw); cfmakeraw(&raw);
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &raw) == -1) die("tcsetattr"); if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &raw) == -1) die("tcsetattr");
} }
void disable_raw_mode() { void disable_raw_mode() {
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &orig_termios) == -1) if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &E.orig_termios) == -1)
die("tcsetattr"); die("tcsetattr");
} }
int get_window_size(int *rows, int *cols) {
struct winsize ws;
if (ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) != -1 && ws.ws_col != 0) {
*rows = ws.ws_row;
*cols = ws.ws_col;
return 0;
}
return -1;
}
void editor_init() {
if (!isatty(STDIN_FILENO)) {
printf("kilo only supports a terminal at standard in. Exiting.");
exit(1);
}
if (get_window_size(&E.rows, &E.cols) == -1) die("get_window_size");
}
void editor_redraw_screen() { void editor_redraw_screen() {
editor_clear_screen(); editor_clear_screen();
@ -62,8 +88,7 @@ void editor_clear_screen() {
} }
void editor_draw_rows() { void editor_draw_rows() {
int rows = 24; for (int y = 0; y < E.rows - 1; y++)
for (int y = 0; y < rows - 1; y++)
write(STDIN_FILENO, "~\r\n", 3); write(STDIN_FILENO, "~\r\n", 3);
write(STDIN_FILENO, "~", 1); write(STDIN_FILENO, "~", 1);
} }