Merge pull request #7 from pml68/feat/options-backend

Options backend done (for now)

1 files changed, 69 insertions, 0 deletions

diff --git a/src/values/content_fit.rs b/src/values/content_fit.rs
new file mode 100644
index 0000000..053431f
--- /dev/null
+++ b/src/values/content_fit.rs
@@ -0,0 +1,69 @@
+use iced::ContentFit;
+
+use super::Value;
+
+#[derive(Debug, thiserror::Error, Clone, PartialEq)]
+pub enum ParseContentFitError {
+    #[error("invalid variant")]
+    InvalidVariant,
+}
+
+impl Value for ContentFit {
+    type Err = ParseContentFitError;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        let s = s.trim();
+
+        if s.is_empty() {
+            Ok(Self::default())
+        } else {
+            match s {
+                "fill" => Ok(Self::Fill),
+                "none" => Ok(Self::None),
+                "cover" => Ok(Self::Cover),
+                "contain" => Ok(Self::Contain),
+                "scale_down" => Ok(Self::ScaleDown),
+                _ => Err(ParseContentFitError::InvalidVariant),
+            }
+        }
+    }
+
+    fn to_string(&self) -> String {
+        match self {
+            Self::Fill => String::from("fill"),
+            Self::None => String::from("none"),
+            Self::Cover => String::from("cover"),
+            Self::Contain => String::from("contain"),
+            Self::ScaleDown => String::from("scale_down"),
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn can_parse_with_spaces() {
+        assert_eq!(ContentFit::from_str("    fill"), Ok(ContentFit::Fill));
+
+        assert_eq!(ContentFit::from_str("  none  "), Ok(ContentFit::None));
+
+        assert_eq!(ContentFit::from_str("cover   "), Ok(ContentFit::Cover));
+
+        assert_eq!(ContentFit::from_str("contain"), Ok(ContentFit::Contain));
+
+        assert_eq!(
+            ContentFit::from_str("scale_down"),
+            Ok(ContentFit::ScaleDown)
+        )
+    }
+
+    #[test]
+    fn cant_parse_invalid_variant() {
+        assert_eq!(
+            ContentFit::from_str("clip"),
+            Err(ParseContentFitError::InvalidVariant)
+        )
+    }
+}