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rulimine/stage23/menu.c

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#include <stdint.h>
#include <stddef.h>
#include <stdbool.h>
#include <menu.h>
#include <lib/print.h>
#include <lib/blib.h>
#include <lib/libc.h>
#include <lib/config.h>
#include <lib/term.h>
#include <lib/gterm.h>
#include <lib/readline.h>
#include <lib/uri.h>
#include <mm/pmm.h>
#include <drivers/vbe.h>
static char *menu_branding = NULL;
#define EDITOR_MAX_BUFFER_SIZE 4096
#define TOK_KEY 0
#define TOK_EQUALS 1
#define TOK_VALUE 2
#define TOK_BADKEY 3
#define TOK_COMMENT 4
static size_t get_line_offset(size_t *displacement, size_t index, const char *buffer) {
size_t offset = 0;
size_t _index = index;
for (size_t i = 0; buffer[i]; i++) {
if (!_index--)
break;
if (buffer[i] == '\n')
offset = i + 1;
}
if (displacement)
*displacement = index - offset;
return offset;
}
static size_t get_line_length(size_t index, const char *buffer) {
size_t i;
for (i = index; buffer[i] != '\n' && buffer[i] != 0; i++);
return i - index;
}
static size_t get_next_line(size_t index, const char *buffer) {
if (buffer[index] == 0)
return index;
size_t displacement;
get_line_offset(&displacement, index, buffer);
while (buffer[index] != '\n') {
if (buffer[index] == 0)
return index;
index++;
}
index++;
size_t next_line_length = get_line_length(index, buffer);
if (displacement > next_line_length)
displacement = next_line_length;
return index + displacement;
}
static size_t get_prev_line(size_t index, const char *buffer) {
size_t offset, displacement, prev_line_offset, prev_line_length;
offset = get_line_offset(&displacement, index, buffer);
if (offset) {
prev_line_offset = get_line_offset(NULL, offset - 1, buffer);
prev_line_length = get_line_length(prev_line_offset, buffer);
if (displacement > prev_line_length)
displacement = prev_line_length;
return prev_line_offset + displacement;
}
return offset;
}
static const char *VALID_KEYS[] = {
"TIMEOUT",
"DEFAULT_ENTRY",
"GRAPHICS",
"MENU_RESOLUTION",
"MENU_BRANDING",
"MENU_FONT",
"TERMINAL_FONT",
"THEME_COLOURS",
"THEME_COLORS",
"THEME_BACKGROUND",
"THEME_FOREGROUND",
"THEME_MARGIN",
"THEME_MARGIN_GRADIENT",
"BACKGROUND_PATH",
"BACKGROUND_STYLE",
"BACKDROP_COLOUR",
"BACKDROP_COLOR",
"EDITOR_ENABLED",
"EDITOR_HIGHLIGHTING",
"EDITOR_VALIDATION",
"VERBOSE",
"PROTOCOL",
"CMDLINE",
"KERNEL_CMDLINE",
"KERNEL_PATH",
"MODULE_PATH",
"MODULE_STRING",
"RESOLUTION",
"KASLR",
"DRIVE",
"PARTITION",
"IMAGE_PATH",
"COMMENT",
NULL
};
static bool validation_enabled = true;
static bool invalid_syntax = false;
static int validate_line(const char *buffer) {
if (!validation_enabled) return TOK_KEY;
if (buffer[0] == '#')
return TOK_COMMENT;
char keybuf[64];
int i;
for (i = 0; buffer[i] && i < 64; i++) {
if (buffer[i] == '=') goto found_equals;
keybuf[i] = buffer[i];
}
fail:
if (i < 64) keybuf[i] = 0;
if (keybuf[0] == '\n' || (!keybuf[0] && buffer[0] != '=')) return TOK_KEY; // blank line is valid
invalid_syntax = true;
return TOK_BADKEY;
found_equals:
if (i < 64) keybuf[i] = 0;
for (i = 0; VALID_KEYS[i]; i++) {
if (!strcmp(keybuf, VALID_KEYS[i])) {
return TOK_KEY;
}
}
goto fail;
}
static char *config_entry_editor(const char *title, const char *orig_entry) {
size_t cursor_offset = 0;
size_t entry_size = strlen(orig_entry);
size_t _window_size = term_rows - 8;
size_t window_offset = 0;
size_t line_size = term_cols - 2;
bool display_overflow_error = false;
// Skip leading newlines
while (*orig_entry == '\n') {
orig_entry++;
entry_size--;
}
if (entry_size >= EDITOR_MAX_BUFFER_SIZE) {
panic("Entry is too big to be edited.");
}
bool syntax_highlighting_enabled = true;
char *syntax_highlighting_enabled_config = config_get_value(NULL, 0, "EDITOR_HIGHLIGHTING");
if (!strcmp(syntax_highlighting_enabled_config, "no")) syntax_highlighting_enabled = false;
validation_enabled = true;
char *validation_enabled_config = config_get_value(NULL, 0, "EDITOR_VALIDATION");
if (!strcmp(validation_enabled_config, "no")) validation_enabled = false;
static char *buffer = NULL;
if (buffer == NULL)
buffer = ext_mem_alloc(EDITOR_MAX_BUFFER_SIZE);
memcpy(buffer, orig_entry, entry_size);
buffer[entry_size] = 0;
refresh:
invalid_syntax = false;
clear(true);
disable_cursor();
{
int x, y;
print("\n");
get_cursor_pos(&x, &y);
set_cursor_pos(term_cols / 2 - DIV_ROUNDUP(strlen(menu_branding), 2), y);
print("\e[36m%s\e[37m", menu_branding);
print("\n\n");
}
print(" \e[32mESC\e[0m Discard and Exit \e[32mF10\e[0m Boot\n");
print("\n\xda");
for (int i = 0; i < term_cols - 2; i++) {
switch (i) {
case 1: case 2: case 3:
if (window_offset > 0) {
print("\x18");
break;
}
// FALLTHRU
default: {
int title_length = strlen(title);
if (i == (term_cols / 2) - DIV_ROUNDUP(title_length, 2)) {
print("%s", title);
i += title_length - 1;
} else {
print("\xc4");
}
}
}
}
print("\xbf\xb3");
int cursor_x, cursor_y;
size_t current_line = 0, line_offset = 0, window_size = _window_size;
bool printed_cursor = false;
int token_type = validate_line(buffer);
for (size_t i = 0; ; i++) {
// newline
if (buffer[i] == '\n'
&& current_line < window_offset + window_size
&& current_line >= window_offset) {
int x, y;
get_cursor_pos(&x, &y);
if (i == cursor_offset) {
cursor_x = x;
cursor_y = y;
printed_cursor = true;
}
set_cursor_pos(term_cols - 1, y);
if (current_line == window_offset + window_size - 1)
print("\xb3\xc0");
else
print("\xb3\xb3");
line_offset = 0;
token_type = validate_line(buffer+i+1);
current_line++;
continue;
}
if (line_offset && !(line_offset % line_size)) {
window_size--;
if (current_line == window_offset + window_size)
print("\x1a\xc0");
else
print("\x1a\x1b\x1b");
}
if (i == cursor_offset
&& current_line < window_offset + window_size
&& current_line >= window_offset) {
get_cursor_pos(&cursor_x, &cursor_y);
printed_cursor = true;
}
if (buffer[i] == 0 || current_line >= window_offset + window_size) {
if (!printed_cursor) {
if (i <= cursor_offset) {
window_offset++;
goto refresh;
}
if (i > cursor_offset) {
window_offset--;
goto refresh;
}
}
break;
}
if (buffer[i] == '\n') {
line_offset = 0;
current_line++;
continue;
}
if (current_line >= window_offset) {
line_offset++;
// switch to token type 1 if equals sign
if (token_type == TOK_KEY && buffer[i] == '=') token_type = TOK_EQUALS;
// syntax highlighting
if (syntax_highlighting_enabled) {
switch (token_type) {
case TOK_KEY:
print("\e[36m%c\e[0m", buffer[i]);
break;
case TOK_EQUALS:
print("\e[32m%c\e[0m", buffer[i]);
break;
case TOK_VALUE:
print("\e[39m%c\e[0m", buffer[i]);
break;
case TOK_BADKEY:
print("\e[31m%c\e[0m", buffer[i]);
break;
case TOK_COMMENT:
print("\e[33m%c\e[0m", buffer[i]);
}
} else {
print("%c", buffer[i]);
}
// switch to token type 2 after equals sign
if (token_type == TOK_EQUALS) token_type = TOK_VALUE;
}
}
// syntax error alert
if (validation_enabled) {
int x, y;
get_cursor_pos(&x, &y);
set_cursor_pos(0, term_rows-1);
if (invalid_syntax) {
print("\e[31mConfiguration is INVALID.\e[0m");
} else {
print("\e[32mConfiguration is valid.\e[0m");
}
set_cursor_pos(x, y);
}
if (current_line - window_offset < window_size) {
int x, y;
for (size_t i = 0; i < (window_size - (current_line - window_offset)) - 1; i++) {
get_cursor_pos(&x, &y);
set_cursor_pos(term_cols - 1, y);
print("\xb3\xb3");
}
get_cursor_pos(&x, &y);
set_cursor_pos(term_cols - 1, y);
print("\xb3\xc0");
}
for (int i = 0; i < term_cols - 2; i++) {
switch (i) {
case 1: case 2: case 3:
if (current_line - window_offset >= window_size) {
print("\x19");
break;
}
// FALLTHRU
default:
print("\xc4");
}
}
print("\xd9");
if (display_overflow_error) {
print("\e[31mText buffer not big enough, delete something instead.");
display_overflow_error = false;
}
// Hack to redraw the cursor
set_cursor_pos(cursor_x, cursor_y);
enable_cursor();
term_double_buffer_flush();
int c = getchar();
switch (c) {
case GETCHAR_CURSOR_DOWN:
cursor_offset = get_next_line(cursor_offset, buffer);
break;
case GETCHAR_CURSOR_UP:
cursor_offset = get_prev_line(cursor_offset, buffer);
break;
case GETCHAR_CURSOR_LEFT:
if (cursor_offset) {
cursor_offset--;
}
break;
case GETCHAR_CURSOR_RIGHT:
if (cursor_offset < strlen(buffer)) {
cursor_offset++;
}
break;
case GETCHAR_HOME: {
size_t displacement;
get_line_offset(&displacement, cursor_offset, buffer);
cursor_offset -= displacement;
break;
}
case GETCHAR_END: {
cursor_offset += get_line_length(cursor_offset, buffer);
break;
}
case '\b':
if (cursor_offset) {
cursor_offset--;
case GETCHAR_DELETE:
for (size_t i = cursor_offset; ; i++) {
buffer[i] = buffer[i+1];
if (!buffer[i])
break;
}
}
break;
case GETCHAR_F10:
disable_cursor();
return buffer;
case GETCHAR_ESCAPE:
disable_cursor();
return NULL;
default:
if (strlen(buffer) < EDITOR_MAX_BUFFER_SIZE - 1) {
for (size_t i = strlen(buffer); ; i--) {
buffer[i+1] = buffer[i];
if (i == cursor_offset)
break;
}
buffer[cursor_offset++] = c;
} else {
display_overflow_error = true;
}
break;
}
goto refresh;
}
static int print_tree(const char *shift, int level, int base_index, int selected_entry,
struct menu_entry *current_entry,
struct menu_entry **selected_menu_entry) {
int max_entries = 0;
bool no_print = false;
if (shift == NULL) {
no_print = true;
}
for (;;) {
if (current_entry == NULL)
break;
if (!no_print) print("%s", shift);
if (level) {
for (int i = level - 1; i > 0; i--) {
struct menu_entry *actual_parent = current_entry;
for (int j = 0; j < i; j++)
actual_parent = actual_parent->parent;
if (actual_parent->next != NULL) {
if (!no_print) print(" \xb3");
} else {
if (!no_print) print(" ");
}
}
if (current_entry->next == NULL) {
if (!no_print) print(" \xc0");
} else {
if (!no_print) print(" \xc3");
}
}
if (current_entry->sub) {
if (!no_print) print(current_entry->expanded ? "[-]" : "[+]");
} else if (level) {
if (!no_print) print("\xc4> ");
} else {
if (!no_print) print(" ");
}
if (base_index + max_entries == selected_entry) {
*selected_menu_entry = current_entry;
if (!no_print) print("\e[47m\e[30m");
}
if (!no_print) print(" %s \e[0m\n", current_entry->name);
if (current_entry->sub && current_entry->expanded) {
max_entries += print_tree(shift, level + 1, base_index + max_entries + 1,
selected_entry,
current_entry->sub,
selected_menu_entry);
}
max_entries++;
current_entry = current_entry->next;
}
return max_entries;
}
char *menu(char **cmdline) {
menu_branding = config_get_value(NULL, 0, "MENU_BRANDING");
if (menu_branding == NULL)
menu_branding = "Limine " LIMINE_VERSION;
bool skip_timeout = false;
struct menu_entry *selected_menu_entry = NULL;
int selected_entry = 0;
char *default_entry = config_get_value(NULL, 0, "DEFAULT_ENTRY");
if (default_entry != NULL) {
selected_entry = strtoui(default_entry, NULL, 10);
if (selected_entry)
selected_entry--;
}
int timeout = 5;
char *timeout_config = config_get_value(NULL, 0, "TIMEOUT");
if (timeout_config != NULL) {
if (!strcmp(timeout_config, "no"))
skip_timeout = true;
else
timeout = strtoui(timeout_config, NULL, 10);
}
bool editor_enabled = true;
char *editor_enabled_config = config_get_value(NULL, 0, "EDITOR_ENABLED");
if (!strcmp(editor_enabled_config, "no")) editor_enabled = false;
if (!timeout) {
// Use print tree to load up selected_menu_entry and determine if the
// default entry is valid.
print_tree(NULL, 0, 0, selected_entry, menu_tree, &selected_menu_entry);
if (selected_menu_entry == NULL || selected_menu_entry->sub != NULL) {
print("Default entry is not valid or directory, booting to menu.\n");
skip_timeout = true;
} else {
goto autoboot;
}
}
// If there is GRAPHICS config key and the value is "yes", enable graphics
#if defined (bios)
char *graphics = config_get_value(NULL, 0, "GRAPHICS");
#elif defined (uefi)
char *graphics = "yes";
#endif
if (graphics != NULL && !strcmp(graphics, "yes")) {
int req_width = 0, req_height = 0, req_bpp = 0;
char *menu_resolution = config_get_value(NULL, 0, "MENU_RESOLUTION");
if (menu_resolution != NULL)
parse_resolution(&req_width, &req_height, &req_bpp, menu_resolution);
term_vbe(req_width, req_height);
}
disable_cursor();
term_double_buffer(true);
refresh:
clear(true);
{
int x, y;
print("\n");
get_cursor_pos(&x, &y);
set_cursor_pos(term_cols / 2 - DIV_ROUNDUP(strlen(menu_branding), 2), y);
print("\e[36m%s\e[37m", menu_branding);
print("\n\n\n\n");
}
if (menu_tree == NULL) {
print("Config file %s.\n\n", config_ready ? "contains no valid entries" : "not found");
print("For information on the format of Limine config entries, consult CONFIG.md in\n");
print("the root of the Limine source repository.\n\n");
print("Press a key to enter an editor session and manually define a config entry...");
term_double_buffer_flush();
getchar();
char *new_body = NULL;
while (new_body == NULL)
new_body = config_entry_editor("New Entry", "");
selected_menu_entry = ext_mem_alloc(sizeof(struct menu_entry));
selected_menu_entry->body = new_body;
config_ready = true;
goto autoboot;
}
{ // Draw box around boot menu
int x, y;
get_cursor_pos(&x, &y);
print("\xda");
for (int i = 0; i < term_cols - 2; i++) {
print("\xc4");
}
print("\xbf");
for (int i = y + 1; i < term_rows - 2; i++) {
set_cursor_pos(0, i);
print("\xb3");
set_cursor_pos(term_cols - 1, i);
print("\xb3");
}
print("\xc0");
for (int i = 0; i < term_cols - 2; i++) {
print("\xc4");
}
print("\xd9");
set_cursor_pos(x, y + 2);
}
int max_entries = print_tree("\xb3 ", 0, 0, selected_entry, menu_tree,
&selected_menu_entry);
{
int x, y;
get_cursor_pos(&x, &y);
set_cursor_pos(0, 3);
if (editor_enabled && selected_menu_entry->sub == NULL) {
print(" \e[32mARROWS\e[0m Select \e[32mENTER\e[0m Boot \e[32mE\e[0m Edit");
} else {
print(" \e[32mARROWS\e[0m Select \e[32mENTER\e[0m %s",
selected_menu_entry->expanded ? "Collapse" : "Expand");
}
set_cursor_pos(x, y);
}
if (selected_menu_entry->sub != NULL)
skip_timeout = true;
int c;
if (skip_timeout == false) {
print("\n\n");
for (int i = timeout; i; i--) {
set_cursor_pos(0, term_rows - 1);
print("\e[32mBooting automatically in %u, press any key to stop the countdown...\e[0m", i);
term_double_buffer_flush();
if ((c = pit_sleep_and_quit_on_keypress(1))) {
skip_timeout = true;
print("\e[2K");
term_double_buffer_flush();
goto timeout_aborted;
}
}
goto autoboot;
}
set_cursor_pos(0, term_rows - 1);
if (selected_menu_entry->comment != NULL)
print("\e[36m%s\e[0m", selected_menu_entry->comment);
term_double_buffer_flush();
for (;;) {
c = getchar();
timeout_aborted:
switch (c) {
case GETCHAR_CURSOR_UP:
if (--selected_entry == -1)
selected_entry = max_entries - 1;
goto refresh;
case GETCHAR_CURSOR_DOWN:
if (++selected_entry == max_entries)
selected_entry = 0;
goto refresh;
case GETCHAR_CURSOR_RIGHT:
case '\n':
autoboot:
if (selected_menu_entry->sub != NULL) {
selected_menu_entry->expanded = !selected_menu_entry->expanded;
goto refresh;
}
enable_cursor();
*cmdline = config_get_value(selected_menu_entry->body, 0, "KERNEL_CMDLINE");
if (!*cmdline) {
*cmdline = config_get_value(selected_menu_entry->body, 0, "CMDLINE");
}
if (!*cmdline) {
*cmdline = "";
}
clear(true);
term_double_buffer(false);
return selected_menu_entry->body;
case 'e': {
if (editor_enabled) {
if (selected_menu_entry->sub != NULL)
goto refresh;
enable_cursor();
char *new_body = config_entry_editor(selected_menu_entry->name, selected_menu_entry->body);
if (new_body == NULL)
goto refresh;
selected_menu_entry->body = new_body;
goto autoboot;
}
}
}
}
}
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