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//! Hikari Menu Subsystem
pub const theme = @import("theme.zig");
pub const input = @import("input.zig");
pub const renderer = @import("renderer.zig");
pub const Theme = theme.Theme;
pub const Input = input.Input;
pub const InputAction = input.InputAction;
pub const Renderer = renderer.Renderer;
pub const MenuItem = renderer.MenuItem;
pub const BootMenu = struct {
renderer: *Renderer,
input: *Input,
items: []const MenuItem,
selected: usize,
scroll_offset: usize,
title: []const u8,
pub fn initialize(
menu_renderer: *Renderer,
menu_input: *Input,
items: []const MenuItem,
title: []const u8,
) BootMenu {
return BootMenu{
.renderer = menu_renderer,
.input = menu_input,
.items = items,
.selected = 0,
.scroll_offset = 0,
.title = title,
};
}
pub fn run(self: *BootMenu) ?usize {
self.input.clear_input_buffer();
self.draw();
while (true) {
const action = self.input.wait_for_action();
switch (action) {
.up => self.move_up(),
.down => self.move_down(),
.page_up => self.page_up(),
.page_down => self.page_down(),
.home => self.go_home(),
.end => self.go_end(),
.select => {
if (self.items[self.selected].enabled) {
return self.selected;
}
},
.cancel => return null,
.none => {},
}
self.draw();
}
}
fn draw(self: *BootMenu) void {
self.renderer.draw_background();
self.renderer.draw_title(self.title);
self.renderer.draw_menu_items(self.items, self.selected, self.scroll_offset);
self.renderer.draw_description(self.items[self.selected].description);
self.renderer.draw_scrollbar(self.items.len, self.renderer.visible_items, self.scroll_offset);
self.renderer.draw_footer();
}
fn move_up(self: *BootMenu) void {
if (self.selected > 0) {
self.selected -= 1;
if (self.selected < self.scroll_offset) {
self.scroll_offset = self.selected;
}
}
}
fn move_down(self: *BootMenu) void {
if (self.selected < self.items.len - 1) {
self.selected += 1;
if (self.selected >= self.scroll_offset + self.renderer.visible_items) {
self.scroll_offset = self.selected - self.renderer.visible_items + 1;
}
}
}
fn page_up(self: *BootMenu) void {
if (self.selected >= self.renderer.visible_items) {
self.selected -= self.renderer.visible_items;
} else {
self.selected = 0;
}
if (self.selected < self.scroll_offset) {
self.scroll_offset = self.selected;
}
}
fn page_down(self: *BootMenu) void {
const remaining = self.items.len - 1 - self.selected;
if (remaining >= self.renderer.visible_items) {
self.selected += self.renderer.visible_items;
} else {
self.selected = self.items.len - 1;
}
if (self.selected >= self.scroll_offset + self.renderer.visible_items) {
self.scroll_offset = self.selected - self.renderer.visible_items + 1;
}
}
fn go_home(self: *BootMenu) void {
self.selected = 0;
self.scroll_offset = 0;
}
fn go_end(self: *BootMenu) void {
self.selected = self.items.len - 1;
if (self.items.len > self.renderer.visible_items) {
self.scroll_offset = self.items.len - self.renderer.visible_items;
}
}
};
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