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Use checked str slices in Rgba::TryFrom<str> (#12097)

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Release Notes:

- N/A

---------

Co-authored-by: Kirill Bulatov <kirill@zed.dev>
This commit is contained in:
bbb651 2024-05-24 12:32:46 +03:00 • committed by GitHub
parent 70e8737918
commit d116f3c292
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1 changed files with 59 additions and 9 deletions
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68
crates/gpui/src/color.rs
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@ -1,4 +1,4 @@
use anyhow::bail;
use anyhow::{bail, Context};
use serde::de::{self, Deserialize, Deserializer, Visitor};
use std::fmt;
@ -126,6 +126,7 @@ impl TryFrom<&'_ str> for Rgba {
const RRGGBBAA: usize = "rrggbbaa".len();
const EXPECTED_FORMATS: &str = "Expected #rgb, #rgba, #rrggbb, or #rrggbbaa";
const INVALID_UNICODE: &str = "invalid unicode characters in color";
let Some(("", hex)) = value.trim().split_once('#') else {
bail!("invalid RGBA hex color: '{value}'. {EXPECTED_FORMATS}");
@ -133,11 +134,31 @@ impl TryFrom<&'_ str> for Rgba {
let (r, g, b, a) = match hex.len() {
RGB | RGBA => {
let r = u8::from_str_radix(&hex[0..1], 16)?;
let g = u8::from_str_radix(&hex[1..2], 16)?;
let b = u8::from_str_radix(&hex[2..3], 16)?;
let r = u8::from_str_radix(
hex.get(0..1).with_context(|| {
format!("{INVALID_UNICODE}: r component of #rgb/#rgba for value: '{value}'")
})?,
16,
)?;
let g = u8::from_str_radix(
hex.get(1..2).with_context(|| {
format!("{INVALID_UNICODE}: g component of #rgb/#rgba for value: '{value}'")
})?,
16,
)?;
let b = u8::from_str_radix(
hex.get(2..3).with_context(|| {
format!("{INVALID_UNICODE}: b component of #rgb/#rgba for value: '{value}'")
})?,
16,
)?;
let a = if hex.len() == RGBA {
u8::from_str_radix(&hex[3..4], 16)?
u8::from_str_radix(
hex.get(3..4).with_context(|| {
format!("{INVALID_UNICODE}: a component of #rgba for value: '{value}'")
})?,
16,
)?
} else {
0xf
};
@ -151,11 +172,40 @@ impl TryFrom<&'_ str> for Rgba {
(duplicate(r), duplicate(g), duplicate(b), duplicate(a))
}
RRGGBB | RRGGBBAA => {
let r = u8::from_str_radix(&hex[0..2], 16)?;
let g = u8::from_str_radix(&hex[2..4], 16)?;
let b = u8::from_str_radix(&hex[4..6], 16)?;
let r = u8::from_str_radix(
hex.get(0..2).with_context(|| {
format!(
"{}: r component of #rrggbb/#rrggbbaa for value: '{}'",
INVALID_UNICODE, value
)
})?,
16,
)?;
let g = u8::from_str_radix(
hex.get(2..4).with_context(|| {
format!(
"{INVALID_UNICODE}: g component of #rrggbb/#rrggbbaa for value: '{value}'"
)
})?,
16,
)?;
let b = u8::from_str_radix(
hex.get(4..6).with_context(|| {
format!(
"{INVALID_UNICODE}: b component of #rrggbb/#rrggbbaa for value: '{value}'"
)
})?,
16,
)?;
let a = if hex.len() == RRGGBBAA {
u8::from_str_radix(&hex[6..8], 16)?
u8::from_str_radix(
hex.get(6..8).with_context(|| {
format!(
"{INVALID_UNICODE}: a component of #rrggbbaa for value: '{value}'"
)
})?,
16,
)?
} else {
0xff
};