1use fidl::unpersist;
2use fidl_cf_sc_internal_virtconconfig::Config as FidlConfig;
3use fuchsia_inspect::{ArithmeticArrayProperty, Node};
4use fuchsia_runtime::{take_startup_handle, HandleInfo, HandleType};
5use std::convert::TryInto;
6const EXPECTED_CHECKSUM: &[u8] = &[
7 0x02, 0x87, 0xd8, 0x2f, 0x8e, 0x68, 0x4f, 0xf2, 0xbe, 0xfd, 0x39, 0x5b, 0xb2, 0x60, 0x47, 0x73,
8 0x34, 0x47, 0x80, 0xd4, 0x93, 0xf7, 0xf9, 0xb9, 0xec, 0x5b, 0x8e, 0x18, 0xaf, 0x3d, 0x7e, 0xf8,
9];
10#[derive(Debug)]
11pub struct Config {
12 pub boot_animation: bool,
13 pub buffer_count: u32,
14 pub color_scheme: String,
15 pub disable: bool,
16 pub display_rotation: u32,
17 pub dpi: Vec<u32>,
18 pub font_size: String,
19 pub keep_log_visible: bool,
20 pub key_map: String,
21 pub keyrepeat: bool,
22 pub rounded_corners: bool,
23 pub scrollback_rows: u32,
24 pub show_logo: bool,
25}
26impl Config {
27 #[doc = r" Take the config startup handle and parse its contents."]
28 #[doc = r""]
29 #[doc = r" # Panics"]
30 #[doc = r""]
31 #[doc = r" If the config startup handle was already taken or if it is not valid."]
32 pub fn take_from_startup_handle() -> Self {
33 let handle_info = HandleInfo::new(HandleType::ComponentConfigVmo, 0);
34 let config_vmo: zx::Vmo =
35 take_startup_handle(handle_info).expect("Config VMO handle must be present.").into();
36 Self::from_vmo(&config_vmo).expect("Config VMO handle must be valid.")
37 }
38 #[doc = r" Parse `Self` from `vmo`."]
39 pub fn from_vmo(vmo: &zx::Vmo) -> Result<Self, Error> {
40 let config_size = vmo.get_content_size().map_err(Error::GettingContentSize)?;
41 let config_bytes = vmo.read_to_vec(0, config_size).map_err(Error::ReadingConfigBytes)?;
42 Self::from_bytes(&config_bytes)
43 }
44 #[doc = r" Parse `Self` from `bytes`."]
45 pub fn from_bytes(bytes: &[u8]) -> Result<Self, Error> {
46 let (checksum_len_bytes, bytes) = bytes.split_at_checked(2).ok_or(Error::TooFewBytes)?;
47 let checksum_len_bytes: [u8; 2] =
48 checksum_len_bytes.try_into().expect("previous call guaranteed 2 element slice");
49 let checksum_length = u16::from_le_bytes(checksum_len_bytes) as usize;
50 let (observed_checksum, bytes) =
51 bytes.split_at_checked(checksum_length).ok_or(Error::TooFewBytes)?;
52 if observed_checksum != EXPECTED_CHECKSUM {
53 return Err(Error::ChecksumMismatch { observed_checksum: observed_checksum.to_vec() });
54 }
55 let fidl_config: FidlConfig = unpersist(bytes).map_err(Error::Unpersist)?;
56 Ok(Self {
57 boot_animation: fidl_config.boot_animation,
58 buffer_count: fidl_config.buffer_count,
59 color_scheme: fidl_config.color_scheme,
60 disable: fidl_config.disable,
61 display_rotation: fidl_config.display_rotation,
62 dpi: fidl_config.dpi,
63 font_size: fidl_config.font_size,
64 keep_log_visible: fidl_config.keep_log_visible,
65 key_map: fidl_config.key_map,
66 keyrepeat: fidl_config.keyrepeat,
67 rounded_corners: fidl_config.rounded_corners,
68 scrollback_rows: fidl_config.scrollback_rows,
69 show_logo: fidl_config.show_logo,
70 })
71 }
72 pub fn record_inspect(&self, inspector_node: &Node) {
73 inspector_node.record_bool("boot_animation", self.boot_animation);
74 inspector_node.record_uint("buffer_count", self.buffer_count as u64);
75 inspector_node.record_string("color_scheme", &self.color_scheme);
76 inspector_node.record_bool("disable", self.disable);
77 inspector_node.record_uint("display_rotation", self.display_rotation as u64);
78 let arr = inspector_node.create_uint_array("dpi", self.dpi.len());
79 for i in 0..self.dpi.len() {
80 arr.add(i, self.dpi[i] as u64);
81 }
82 inspector_node.record(arr);
83 inspector_node.record_string("font_size", &self.font_size);
84 inspector_node.record_bool("keep_log_visible", self.keep_log_visible);
85 inspector_node.record_string("key_map", &self.key_map);
86 inspector_node.record_bool("keyrepeat", self.keyrepeat);
87 inspector_node.record_bool("rounded_corners", self.rounded_corners);
88 inspector_node.record_uint("scrollback_rows", self.scrollback_rows as u64);
89 inspector_node.record_bool("show_logo", self.show_logo);
90 }
91}
92#[derive(Debug)]
93pub enum Error {
94 #[doc = r" Failed to read the content size of the VMO."]
95 GettingContentSize(zx::Status),
96 #[doc = r" Failed to read the content of the VMO."]
97 ReadingConfigBytes(zx::Status),
98 #[doc = r" The VMO was too small for this config library."]
99 TooFewBytes,
100 #[doc = r" The VMO's config ABI checksum did not match this library's."]
101 ChecksumMismatch { observed_checksum: Vec<u8> },
102 #[doc = r" Failed to parse the non-checksum bytes of the VMO as this library's FIDL type."]
103 Unpersist(fidl::Error),
104}
105impl std::fmt::Display for Error {
106 fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
107 match self {
108 Self::GettingContentSize(status) => {
109 write!(f, "Failed to get content size: {status}")
110 }
111 Self::ReadingConfigBytes(status) => {
112 write!(f, "Failed to read VMO content: {status}")
113 }
114 Self::TooFewBytes => {
115 write!(f, "VMO content is not large enough for this config library.")
116 }
117 Self::ChecksumMismatch { observed_checksum } => {
118 write!(
119 f,
120 "ABI checksum mismatch, expected {:?}, got {:?}",
121 EXPECTED_CHECKSUM, observed_checksum,
122 )
123 }
124 Self::Unpersist(fidl_error) => {
125 write!(f, "Failed to parse contents of config VMO: {fidl_error}")
126 }
127 }
128 }
129}
130impl std::error::Error for Error {
131 #[allow(unused_parens, reason = "rustfmt errors without parens here")]
132 fn source(&self) -> Option<(&'_ (dyn std::error::Error + 'static))> {
133 match self {
134 Self::GettingContentSize(ref status) | Self::ReadingConfigBytes(ref status) => {
135 Some(status)
136 }
137 Self::TooFewBytes => None,
138 Self::ChecksumMismatch { .. } => None,
139 Self::Unpersist(ref fidl_error) => Some(fidl_error),
140 }
141 }
142 fn description(&self) -> &str {
143 match self {
144 Self::GettingContentSize(_) => "getting content size",
145 Self::ReadingConfigBytes(_) => "reading VMO contents",
146 Self::TooFewBytes => "VMO contents too small",
147 Self::ChecksumMismatch { .. } => "ABI checksum mismatch",
148 Self::Unpersist(_) => "FIDL parsing error",
149 }
150 }
151}