Aren/rulimine
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
9538d62068
rulimine/stage2/menu.c

418 lines
12 KiB
C
Raw Blame History

#include <stdint.h>
#include <stddef.h>
#include <stdbool.h>
#include <limine.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/readline.h>
#include <lib/uri.h>
#include <mm/pmm.h>
#include <drivers/vbe.h>
static char *menu_branding = NULL;
static void cursor_back(void) {
int x, y;
get_cursor_pos(&x, &y);
if (x) {
x--;
} else if (y) {
y--;
x = term_cols - 1;
}
set_cursor_pos(x, y);
}
static void cursor_fwd(void) {
int x, y;
get_cursor_pos(&x, &y);
if (x < term_cols - 1) {
x++;
} else if (y < term_rows - 1) {
y++;
x = 0;
}
set_cursor_pos(x, y);
}
#define EDITOR_MAX_BUFFER_SIZE 4096
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');
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 char *config_entry_editor(const char *orig_entry) {
size_t cursor_offset = 0;
size_t entry_size = strlen(orig_entry);
// 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.");
char *buffer = ext_mem_alloc(EDITOR_MAX_BUFFER_SIZE);
memcpy(buffer, orig_entry, entry_size);
buffer[entry_size] = 0;
refresh:
clear(true);
disable_cursor();
print("\n\n \e[36m %s \e[37m\n\n\n", menu_branding);
print("Editing entry.\n");
print("Press esc to return to main menu and discard changes, press F10 to boot.\n");
print("\n");
for (int i = 0; i < term_cols; i++)
print("-");
int cursor_x, cursor_y;
for (size_t i = 0; ; i++) {
if (i == cursor_offset)
get_cursor_pos(&cursor_x, &cursor_y);
if (buffer[i] == 0)
break;
print("%c", buffer[i]);
}
print("\n");
for (int i = 0; i < term_cols; i++)
print("-");
// 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--;
cursor_back();
}
break;
case GETCHAR_CURSOR_RIGHT:
if (cursor_offset < strlen(buffer)) {
cursor_offset++;
cursor_fwd();
}
break;
case '\b':
if (cursor_offset) {
cursor_offset--;
cursor_back();
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 '\e':
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;
}
break;
}
goto refresh;
}
static int print_tree(int level, int base_index, int selected_entry,
struct menu_entry *current_entry,
struct menu_entry **selected_menu_entry) {
int max_entries = 0;
for (;;) {
if (current_entry == NULL)
break;
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)
print(" \xb3");
else
print(" ");
}
if (current_entry->next == NULL)
print(" \xc0");
else
print(" \xc3");
}
if (current_entry->sub)
print(current_entry->expanded ? "[-]" : "[+]");
else if (level)
print("\xc4> ");
else
print(" ");
if (base_index + max_entries == selected_entry) {
*selected_menu_entry = current_entry;
print("\e[47m\e[30m");
}
print(" %s \e[0m\n", current_entry->name);
if (current_entry->sub && current_entry->expanded) {
max_entries += print_tree(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;
if (menu_tree == NULL)
panic("Config contains no valid entries.");
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);
}
if (!timeout) {
// Use print tree to load up selected_menu_entry and determine if the
// default entry is valid.
print_tree(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
char *graphics = config_get_value(NULL, 0, "GRAPHICS");
if (graphics != NULL && !strcmp(graphics, "yes")) {
// default scheme
int margin = 64;
int margin_gradient = 20;
uint32_t colourscheme[] = {
0x00000000, // black
0x00aa0000, // red
0x0000aa00, // green
0x00aa5500, // brown
0x000000aa, // blue
0x00aa00aa, // magenta
0x0000aaaa, // cyan
0x00aaaaaa // grey
};
char *colours = config_get_value(NULL, 0, "THEME_COLOURS");
if (colours == NULL)
colours = config_get_value(NULL, 0, "THEME_COLORS");
if (colours != NULL) {
const char *first = colours;
for (int i = 0; i < 8; i++) {
const char *last;
uint32_t col = strtoui(first, &last, 16);
if (first == last)
break;
colourscheme[i] = col;
if (*last == 0)
break;
first = last + 1;
}
}
char *theme_margin = config_get_value(NULL, 0, "THEME_MARGIN");
if (theme_margin != NULL) {
margin = strtoui(theme_margin, NULL, 10);
}
char *theme_margin_gradient = config_get_value(NULL, 0, "THEME_MARGIN_GRADIENT");
if (theme_margin_gradient != NULL) {
margin_gradient = strtoui(theme_margin_gradient, NULL, 10);
}
struct image *bg = NULL;
char *background_path = config_get_value(NULL, 0, "BACKGROUND_PATH");
if (background_path == NULL)
goto nobg;
struct file_handle *bg_file = ext_mem_alloc(sizeof(struct file_handle));
if (!uri_open(bg_file, background_path))
goto nobg;
bg = ext_mem_alloc(sizeof(struct image));
if (open_image(bg, bg_file))
bg = NULL;
nobg:
term_vbe(colourscheme, margin, margin_gradient, bg);
}
disable_cursor();
term_double_buffer(true);
refresh:
clear(true);
print("\n\n \e[36m %s \e[37m\n\n\n", menu_branding);
print("Select an entry:\n\n");
int max_entries = print_tree(0, 0, selected_entry, menu_tree,
&selected_menu_entry);
print("\nArrows to choose, enter to boot, 'e' to edit selected entry.");
if (selected_menu_entry->sub != NULL)
skip_timeout = true;
int c;
if (skip_timeout == false) {
print("\n\n");
for (int i = timeout; i; i--) {
print("\rBooting automatically in %u, press any key to stop the countdown...", i);
term_double_buffer_flush();
if ((c = pit_sleep_and_quit_on_keypress(18))) {
skip_timeout = true;
print("\e[2K\r\e[2A");
goto timeout_aborted;
}
}
goto autoboot;
}
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 '\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 (selected_menu_entry->sub != NULL)
goto refresh;
enable_cursor();
char *new_body = config_entry_editor(selected_menu_entry->body);
if (new_body == NULL)
goto refresh;
selected_menu_entry->body = new_body;
goto autoboot;
}
}
}
}
Reference in New Issue View Git Blame Copy Permalink