diff options
| -rw-r--r-- | ted.c | 84 |
1 files changed, 65 insertions, 19 deletions
@@ -15,6 +15,10 @@ * You should have received a copy of the GNU General Public License * along with this program. If not, see <https://www.gnu.org/licenses/>. */ +#define _DEFAULT_SOURCE +#define _BSD_SOURCE +#define _GNU_SOURCE + #include <ctype.h> #include <errno.h> #include <stdbool.h> @@ -23,6 +27,7 @@ #include <stdlib.h> #include <string.h> #include <sys/ioctl.h> +#include <sys/types.h> #include <termios.h> #include <unistd.h> @@ -43,20 +48,28 @@ enum editor_key { PAGE_DOWN }; +typedef struct erow { + int size; + char *chars; +} erow_t; + typedef struct editor_config { int cx, cy; int screen_rows; int screen_cols; + int num_rows; + erow_t row; struct termios orig_termios; } editor_config_t; editor_config_t E; -void editor_init(editor_config_t *ec); -int editor_read_key(); int get_cursor_position(int *rows, int *cols); int get_window_size(int *rows, int *cols); +void editor_init(editor_config_t *ec); +void editor_open(editor_config_t *ec, char *filename); +int editor_read_key(); void editor_move_cursor(editor_config_t *ec, int key); void editor_process_key(editor_config_t *ec); void editor_draw_rows(editor_config_t *ec, string_builder_t *sb); @@ -67,11 +80,14 @@ void enable_raw_mode(); void die(const char *s); int -main() +main(int argc, char *argv[]) { enable_raw_mode(); editor_init(&E); + if (argc >= 2) { + editor_open(&E, argv[1]); + } while (true) { editor_refresh_screen(&E); @@ -86,11 +102,35 @@ editor_init(editor_config_t *ec) { ec->cx = 0; ec->cy = 0; + ec->num_rows = 0; if (get_window_size(&ec->screen_rows, &ec->screen_cols) == -1) { die("get_window_size"); } } +void +editor_open(editor_config_t *ec, char *filename) +{ + FILE *fp = fopen(filename, "r"); + if (!fp) die("fopen"); + + char* line = NULL; + size_t linecap = 0; + ssize_t linelen = getline(&line, &linecap, fp); + if (linelen != -1) { + while (linelen > 0 && (line[linelen - 1] == '\n' || line[linelen - 1] == '\r')) { + linelen--; + } + ec->row.size = linelen; + ec->row.chars = malloc(linelen + 1); + memcpy(ec->row.chars, line, linelen); + ec->row.chars[linelen] = '\0'; + ec->num_rows = 1; + } + free(line); + fclose(fp); +} + int editor_read_key() { @@ -263,26 +303,32 @@ void editor_draw_rows(editor_config_t *ec, string_builder_t *sb) { for (int y = 0; y < ec->screen_rows; ++y) { - if (y == ec->screen_rows / 3) { - char welcome[80]; - int welcomelen = snprintf(welcome, sizeof(welcome), "Ted editor --- version %s", TED_VERSION); - if (welcomelen > ec->screen_cols) { - welcomelen = ec->screen_cols; - } + if (y >= ec->num_rows) { + if (ec->num_rows == 0 && y == ec->screen_rows / 3) { + char welcome[80]; + int welcomelen = snprintf(welcome, sizeof(welcome), "Ted editor --- version %s", TED_VERSION); + if (welcomelen > ec->screen_cols) { + welcomelen = ec->screen_cols; + } - int padding = (ec->screen_cols - welcomelen) / 2; - if (padding) { - string_builder_append(sb, "~", 1); - padding--; - } + int padding = (ec->screen_cols - welcomelen) / 2; + if (padding) { + string_builder_append(sb, "~", 1); + padding--; + } - while (padding--) { - string_builder_append(sb, " ", 1); - } + while (padding--) { + string_builder_append(sb, " ", 1); + } - string_builder_append(sb, welcome, welcomelen); + string_builder_append(sb, welcome, welcomelen); + } else { + string_builder_append(sb, "~", 1); + } } else { - string_builder_append(sb, "~", 1); + int len = ec->row.size; + if (len > ec->screen_cols) len = ec->screen_cols; + string_builder_append(sb, ec->row.chars, len); } string_builder_append(sb, "\x1b[K", 3); |