commit 0c4988cd1abbc7702c0164e307f834ade46f91da
parent cd8e86eac700777e4aeb47aa659cf3d5319cd379
Author: night0721 <[email protected]>
Date: Thu, 4 Jul 2024 17:04:16 +0100
Refactor input/output functions to io.c
Diffstat:
| A | src/io.c | | | 309 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
1 file changed, 309 insertions(+), 0 deletions(-)
diff --git a/src/io.c b/src/io.c
@@ -0,0 +1,309 @@
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#include <unistd.h>
+#include <errno.h>
+#include <fcntl.h>
+
+#include "editor.h"
+#include "term.h"
+#include "vip.h"
+#include "bar.h"
+
+int read_key()
+{
+ int nread;
+ char c;
+ while ((nread = read(STDIN_FILENO, &c, 1)) != 1) {
+ if (nread == -1 && errno != EAGAIN) {
+ die("read");
+ }
+ }
+
+ if (c == '\x1b') {
+ char seq[3];
+
+ if (read(STDIN_FILENO, &seq[0], 1) != 1)
+ return '\x1b';
+ if (read(STDIN_FILENO, &seq[1], 1) != 1)
+ return '\x1b';
+
+ if (seq[0] == '[') {
+ if (seq[1] >= '0' && seq[1] <= '9') {
+ if (read(STDIN_FILENO, &seq[2], 1) != 1)
+ return '\x1b';
+ 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 '\x1b';
+ } else {
+ return c;
+ }
+}
+
+void save_file()
+{
+ if (vip.filename == NULL) {
+ vip.filename = prompt_editor("Save as: %s", NULL);
+ if (vip.filename == NULL) {
+ set_status_bar_message("Save aborted");
+ return;
+ }
+ select_syntax_highlight();
+ }
+ int len;
+ char *buf = rows_to_str(&len);
+ int fd = open(vip.filename, O_RDWR | O_CREAT, 0644);
+ if (fd != -1) {
+ if (ftruncate(fd, len) != -1) {
+ if (write(fd, buf, len) == len) {
+ close(fd);
+ free(buf);
+ vip.dirty = 0;
+ set_status_bar_message("\"%s\" %dL, %dB written", vip.filename, vip.rows, len);
+ return;
+ }
+ }
+ close(fd);
+ }
+ free(buf);
+ set_status_bar_message("Error saving: %s", strerror(errno));
+}
+
+void process_key()
+{
+
+ int c = read_key();
+ switch (c) {
+ case '\r':
+ insert_new_line();
+ break;
+
+ case HOME_KEY:
+ vip.cx = 0;
+ break;
+
+ case END_KEY:
+ if (vip.cy < vip.rows) {
+ vip.cx = vip.row[vip.cy].size;
+ }
+ break;
+
+ case BACKSPACE:
+ case CTRL_KEY('h'):
+ case DEL_KEY: /* PASSTHROUGH */
+ if (vip.mode == INSERT) {
+ if (c == DEL_KEY)
+ move_cursor(ARROW_RIGHT);
+ del_char();
+ }
+ break;
+
+ case PAGE_UP:
+ case PAGE_DOWN:
+ {
+ 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);
+ }
+ break;
+
+ case ARROW_UP:
+ case ARROW_DOWN:
+ case ARROW_LEFT:
+ case ARROW_RIGHT:
+ if (vip.mode == INSERT) {
+ move_cursor(c);
+ }
+ break;
+
+ case CTRL_KEY('l'):
+ case '\x1b':
+ if (vip.mode == INSERT) {
+ vip.mode = NORMAL;
+ move_cursor(ARROW_LEFT);
+ }
+ break;
+
+ case 'i': /* PASSTHROUGH */
+ if (vip.mode == NORMAL) {
+ vip.mode = INSERT;
+ break;
+ }
+
+ case ':': /* PASSTHROUGH */
+ if (vip.mode == NORMAL) {
+ vip.mode = COMMAND;
+ char *cmd = prompt_editor(":%s", NULL);
+ if (cmd == NULL) {
+ vip.mode = NORMAL;
+ return;
+ }
+ switch (cmd[0]) {
+ case 'q':
+ if (cmd[1] == '!') {
+ write(STDOUT_FILENO, "\x1b[2J", 4);
+ write(STDOUT_FILENO, "\x1b[H", 3);
+ exit(0);
+ break;
+ } else {
+ if (vip.dirty) {
+ set_status_bar_message("No write since last change for buffer \"%s\"", vip.filename);
+ vip.mode = NORMAL;
+ return;
+ }
+ write(STDOUT_FILENO, "\x1b[2J", 4);
+ write(STDOUT_FILENO, "\x1b[H", 3);
+ exit(0);
+ break;
+
+ }
+ case 'w':
+ save_file();
+ vip.mode = NORMAL;
+ }
+ }
+ case '/': /* PASSTHROUGH */
+ if (vip.mode == NORMAL) {
+ find_editor();
+ break;
+ }
+
+ case 'k': /* PASSTHROUGH */
+ if (vip.mode != INSERT) {
+ move_cursor(ARROW_UP);
+ break;
+ }
+
+ case 'j': /* PASSTHROUGH */
+ if (vip.mode != INSERT) {
+ move_cursor(ARROW_DOWN);
+ break;
+ }
+
+ case 'l': /* PASSTHROUGH */
+ if (vip.mode != INSERT) {
+ move_cursor(ARROW_RIGHT);
+ break;
+ }
+
+ case 'h': /* PASSTHROUGH */
+ if (vip.mode != INSERT) {
+ move_cursor(ARROW_LEFT);
+ break;
+ }
+
+ case 'o': /* PASSTHROUGH */
+ if (vip.mode == NORMAL) {
+ shift_new_line();
+ vip.mode = INSERT;
+ break;
+ }
+
+ default:
+ if (vip.mode == INSERT) {
+ insert_char(c);
+ }
+ break;
+ }
+}
+
+void draw_rows(struct abuf *ab)
+{
+ for (int y = 0; y < vip.screenrows; y++) {
+ int filerow = y + vip.rowoff;
+ if (filerow >= vip.rows) {
+ if (vip.rows == 0 && y == vip.screenrows / 3) {
+ char welcome[11];
+ int welcomelen = snprintf(welcome, sizeof(welcome),
+ "VIP v%s", VERSION);
+ if (welcomelen > vip.screencols)
+ welcomelen = vip.screencols;
+ int padding = (vip.screencols - welcomelen) / 2;
+ if (padding) {
+ abAppend(ab, "~", 1);
+ padding--;
+ }
+ while (padding--) abAppend(ab, " ", 1);
+ abAppend(ab, welcome, welcomelen);
+ } else {
+ abAppend(ab, "~", 1);
+ }
+ } else {
+ int len = vip.row[filerow].render_size - vip.coloff;
+ if (len < 0) len = 0;
+ if (len > vip.screencols) len = vip.screencols;
+ char *c = &vip.row[filerow].render[vip.coloff];
+ unsigned char *hl = &vip.row[filerow].hl[vip.coloff];
+
+ char *current_color = malloc(COLOR_LEN * 2);
+ int current_color_len = 0;
+ for (int j = 0; j < len; j++) {
+ if (iscntrl(c[j])) {
+ char sym = (c[j] <= 26) ? '@' + c[j] : '?';
+ abAppend(ab, "\x1b[7m", 4);
+ abAppend(ab, &sym, 1);
+ abAppend(ab, "\x1b[m", 3);
+ if (strncmp(current_color, WHITE_BG, COLOR_LEN)) {
+ char *buf = malloc(COLOR_LEN * 2);
+ memcpy(buf, current_color, current_color_len);
+ abAppend(ab, buf, current_color_len);
+ free(buf);
+ }
+ } else if (hl[j] == NORMAL) {
+ if (strncmp(current_color, WHITE_BG, COLOR_LEN)) {
+ memcpy(current_color, WHITE_BG, COLOR_LEN);
+ current_color_len = COLOR_LEN;
+ abAppend(ab, WHITE_BG, COLOR_LEN);
+ }
+ abAppend(ab, &c[j], 1);
+ } else {
+ size_t len;
+ char *color = syntax_to_color(hl[j], &len);
+ if (strncmp(current_color, color, len)) {
+ memcpy(current_color, color, len);
+ current_color_len = len;
+ abAppend(ab, color, len);
+ }
+ free(color);
+ abAppend(ab, &c[j], 1);
+ }
+ }
+ free(current_color);
+ abAppend(ab, WHITE_BG, COLOR_LEN);
+ }
+
+ abAppend(ab, "\x1b[K", 3);
+ abAppend(ab, "\r\n", 2);
+ }
+}
