Apply lints and cleanup to Rust code

document-legacy/src/layers/folder_layer.rs

@@ -72,7 +72,7 @@ impl FolderLayer {
 		let mut insert_index = insert_index as i128;
 
 		if insert_index < 0 {
-			insert_index = self.layers.len() as i128 + insert_index as i128 + 1;
+			insert_index = self.layers.len() as i128 + insert_index + 1;
 		}
 
 		if insert_index <= self.layers.len() as i128 && insert_index >= 0 {

document-legacy/src/layers/style/mod.rs

@@ -21,9 +21,10 @@ fn format_opacity(name: &str, opacity: f32) -> String {
 }
 
 /// Represents different ways of rendering an object
-#[derive(Debug, Clone, Copy, PartialEq, Eq, Deserialize, Serialize, specta::Type)]
+#[derive(Default, Debug, Clone, Copy, PartialEq, Eq, Deserialize, Serialize, specta::Type)]
 pub enum ViewMode {
 	/// Render with normal coloration at the current viewport resolution
+	#[default]
 	Normal,
 	/// Render only the outlines of shapes at the current viewport resolution
 	Outline,
@@ -31,12 +32,6 @@ pub enum ViewMode {
 	Pixels,
 }
 
-impl Default for ViewMode {
-	fn default() -> Self {
-		ViewMode::Normal
-	}
-}
-
 /// Contains metadata for rendering the document as an svg
 #[derive(Debug, Clone, Copy)]
 pub struct RenderData<'a> {
@@ -55,18 +50,13 @@ impl<'a> RenderData<'a> {
 	}
 }
 
-#[derive(PartialEq, Eq, Clone, Copy, Debug, Hash, Serialize, Deserialize, specta::Type)]
+#[derive(Default, PartialEq, Eq, Clone, Copy, Debug, Hash, Serialize, Deserialize, specta::Type)]
 pub enum GradientType {
+	#[default]
 	Linear,
 	Radial,
 }
 
-impl Default for GradientType {
-	fn default() -> Self {
-		GradientType::Linear
-	}
-}
-
 /// A gradient fill.
 ///
 /// Contains the start and end points, along with the colors at varying points along the length.
@@ -183,19 +173,14 @@ impl Gradient {
 ///
 /// Can be None, a solid [Color], a linear [Gradient], a radial [Gradient] or potentially some sort of image or pattern in the future
 #[repr(C)]
-#[derive(Debug, Clone, PartialEq, Serialize, Deserialize, specta::Type)]
+#[derive(Default, Debug, Clone, PartialEq, Serialize, Deserialize, specta::Type)]
 pub enum Fill {
+	#[default]
 	None,
 	Solid(Color),
 	Gradient(Gradient),
 }
 
-impl Default for Fill {
-	fn default() -> Self {
-		Self::None
-	}
-}
-
 impl Fill {
 	/// Construct a new solid [Fill] from a [Color].
 	pub fn solid(color: Color) -> Self {