96 lines
2.0 KiB
C
96 lines
2.0 KiB
C
#include <stdint.h>
|
|
#include "options.h"
|
|
#include "text.h"
|
|
#include "util.h"
|
|
#include "kbd.h"
|
|
|
|
int boot_edit = 0;
|
|
|
|
static uint16_t attribute_cache[80*25] = {0};
|
|
|
|
static void draw_text(int cursor, int len) {
|
|
int i = 0;
|
|
for (int _my_y = 0; _my_y < 25; ++_my_y) {
|
|
for (int _my_x = 0; _my_x < 80; ++_my_x) {
|
|
int ch = (i < len) ? cmdline[i] : ' ';
|
|
int attr = (i == cursor) ? 0x70 : 0x07;
|
|
uint16_t combined = (attr << 8) | (ch & 0xFF);
|
|
|
|
if (attribute_cache[i] != combined) {
|
|
move_cursor(_my_x, _my_y);
|
|
set_attr(attr);
|
|
print_((char[]){ch,'\0'});
|
|
attribute_cache[i] = combined;
|
|
}
|
|
|
|
i++;
|
|
}
|
|
}
|
|
}
|
|
|
|
int boot_editor(void) {
|
|
int len = strlen(cmdline);
|
|
int cursor = len;
|
|
int data = 0;
|
|
|
|
memset(attribute_cache, 0, sizeof(attribute_cache));
|
|
|
|
while (1) {
|
|
draw_text(cursor, len);
|
|
|
|
int status;
|
|
do {
|
|
status = read_key(&data);
|
|
} while (status == 1);
|
|
|
|
if (status == 0) {
|
|
/* Handle a few special characters */
|
|
if (data == '\n') {
|
|
return 1;
|
|
} else if (data == 27) {
|
|
return 0;
|
|
} else if (data == '\b') {
|
|
if (!cursor) continue;
|
|
if (cursor == len) {
|
|
cmdline[len-1] = '\0';
|
|
cursor--;
|
|
len--;
|
|
} else {
|
|
cmdline[cursor-1] = '\0';
|
|
strcat(cmdline,&cmdline[cursor]);
|
|
cursor--;
|
|
len--;
|
|
}
|
|
} else {
|
|
if (len > 1022) continue;
|
|
/* Move everything from the cursor onward forward */
|
|
if (cursor < len) {
|
|
int x = len + 1;
|
|
while (x > cursor) {
|
|
cmdline[x] = cmdline[x-1];
|
|
x--;
|
|
}
|
|
}
|
|
cmdline[cursor] = data;
|
|
len++;
|
|
cursor++;
|
|
}
|
|
} else if (status == 2) {
|
|
/* Left */
|
|
if (cursor) cursor--;
|
|
} else if (status == 3) {
|
|
/* Right */
|
|
if (cursor < len) cursor++;
|
|
} else if (status == 4) {
|
|
/* Shift-left: Word left */
|
|
while (cursor && cmdline[cursor] == ' ') cursor--;
|
|
while (cursor && cmdline[cursor] != ' ') cursor--;
|
|
} else if (status == 5) {
|
|
/* Shift-right: Word right */
|
|
while (cursor < len && cmdline[cursor] == ' ') cursor++;
|
|
while (cursor < len && cmdline[cursor] != ' ') cursor++;
|
|
}
|
|
}
|
|
}
|
|
|