feat: implement `ValueFromStr` for Rotation

1 files changed, 37 insertions, 0 deletions

diff --git a/src/values/rotation.rs b/src/values/rotation.rs
new file mode 100644
index 0000000..2b7a223
--- /dev/null
+++ b/src/values/rotation.rs
@@ -0,0 +1,37 @@
+use std::num::ParseFloatError;
+use std::str::FromStr;
+
+use iced::{Radians, Rotation};
+
+use super::ValueFromStr;
+
+#[derive(Debug, thiserror::Error)]
+pub enum ParseRotationError {
+    #[error("float parsing error: {0}")]
+    ParseFloatError(ParseFloatError),
+    #[error("invalid prefix")]
+    InvalidPrefix,
+}
+
+impl From<ParseFloatError> for ParseRotationError {
+    fn from(value: ParseFloatError) -> Self {
+        Self::ParseFloatError(value)
+    }
+}
+
+impl ValueFromStr for Rotation {
+    type Err = ParseRotationError;
+
+    fn value_from_str(s: &str) -> Result<Self, Self::Err> {
+        if s.starts_with(|c: char| !c.is_digit(10)) {
+            let (prefix, value) = s.split_at(1);
+            match prefix {
+                "s" => Ok(Rotation::Solid(Radians(f32::from_str(value)?))),
+                "f" => Ok(Rotation::Floating(Radians(f32::from_str(value)?))),
+                _ => Err(ParseRotationError::InvalidPrefix),
+            }
+        } else {
+            Ok(Rotation::Floating(Radians(f32::from_str(s)?)))
+        }
+    }
+}