virtcon_config/
virtcon_config_rust_config_lib_source.rs

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use fidl::unpersist;
use fidl_cf_sc_internal_virtconconfig::Config as FidlConfig;
use fuchsia_inspect::{ArithmeticArrayProperty, Node};
use fuchsia_runtime::{take_startup_handle, HandleInfo, HandleType};
#[derive(Debug)]
pub struct Config {
    pub boot_animation: bool,
    pub buffer_count: u32,
    pub color_scheme: String,
    pub disable: bool,
    pub display_rotation: u32,
    pub dpi: Vec<u32>,
    pub font_size: String,
    pub keep_log_visible: bool,
    pub key_map: String,
    pub keyrepeat: bool,
    pub rounded_corners: bool,
    pub scrollback_rows: u32,
}
impl Config {
    pub fn take_from_startup_handle() -> Self {
        let config_vmo: zx::Vmo =
            take_startup_handle(HandleInfo::new(HandleType::ComponentConfigVmo, 0))
                .expect("Config VMO handle must be provided and cannot already have been taken.")
                .into();
        let config_size =
            config_vmo.get_content_size().expect("must be able to read config vmo content size");
        assert_ne!(config_size, 0, "config vmo must be non-empty");
        let config_bytes =
            config_vmo.read_to_vec(0, config_size).expect("must be able to read config vmo");
        let checksum_length = u16::from_le_bytes([config_bytes[0], config_bytes[1]]) as usize;
        let fidl_start = 2 + checksum_length;
        let observed_checksum = &config_bytes[2..fidl_start];
        let expected_checksum = vec![
            0x74, 0x6e, 0xae, 0x39, 0xee, 0xe2, 0xab, 0xf5, 0x23, 0xae, 0x2e, 0xfd, 0x27, 0x31,
            0x55, 0x10, 0x56, 0xd5, 0xd8, 0xc2, 0x51, 0x64, 0x42, 0x84, 0x68, 0xd1, 0xea, 0x75,
            0xf6, 0xaf, 0x96, 0xd7,
        ];
        assert_eq!(
            observed_checksum, expected_checksum,
            "checksum from config VMO does not match expected checksum"
        );
        let fidl_config: FidlConfig = unpersist(&config_bytes[fidl_start..])
            .expect("must be able to parse bytes as config FIDL");
        Self {
            boot_animation: fidl_config.boot_animation,
            buffer_count: fidl_config.buffer_count,
            color_scheme: fidl_config.color_scheme,
            disable: fidl_config.disable,
            display_rotation: fidl_config.display_rotation,
            dpi: fidl_config.dpi,
            font_size: fidl_config.font_size,
            keep_log_visible: fidl_config.keep_log_visible,
            key_map: fidl_config.key_map,
            keyrepeat: fidl_config.keyrepeat,
            rounded_corners: fidl_config.rounded_corners,
            scrollback_rows: fidl_config.scrollback_rows,
        }
    }
    pub fn record_inspect(&self, inspector_node: &Node) {
        inspector_node.record_bool("boot_animation", self.boot_animation);
        inspector_node.record_uint("buffer_count", self.buffer_count as u64);
        inspector_node.record_string("color_scheme", &self.color_scheme);
        inspector_node.record_bool("disable", self.disable);
        inspector_node.record_uint("display_rotation", self.display_rotation as u64);
        let arr = inspector_node.create_uint_array("dpi", self.dpi.len());
        for i in 0..self.dpi.len() {
            arr.add(i, self.dpi[i] as u64);
        }
        inspector_node.record(arr);
        inspector_node.record_string("font_size", &self.font_size);
        inspector_node.record_bool("keep_log_visible", self.keep_log_visible);
        inspector_node.record_string("key_map", &self.key_map);
        inspector_node.record_bool("keyrepeat", self.keyrepeat);
        inspector_node.record_bool("rounded_corners", self.rounded_corners);
        inspector_node.record_uint("scrollback_rows", self.scrollback_rows as u64);
    }
}