transform and components

src/style.rs

@@ -0,0 +1,81 @@
+use crate::component;
+
+pub struct RawTransform {
+    pub x: u16,
+    pub y: u16,
+    pub width: u16,
+    pub height: u16,
+}
+
+#[derive(Debug, Clone)]
+pub enum Position {
+    Center,
+    Const(u16),
+}
+
+#[derive(Debug, Clone)]
+pub enum Dimension {
+    Auto,
+    Const(u16),
+}
+
+component!(Transform {
+    pub x: Position,
+    pub y: Position,
+    pub width: Dimension,
+    pub height: Dimension,
+});
+
+impl Transform {
+    pub fn new() -> Transform {
+        Transform {
+            x: Position::Const(0),
+            y: Position::Const(0),
+            width: Dimension::Auto,
+            height: Dimension::Auto,
+        }
+    }
+
+    pub fn center() -> Transform {
+        Transform {
+            x: Position::Center,
+            y: Position::Center,
+            width: Dimension::Auto,
+            height: Dimension::Auto,
+        }
+    }
+
+    pub fn position(x: Position, y: Position) -> Transform {
+        Transform {
+            x,
+            y,
+            width: Dimension::Auto,
+            height: Dimension::Auto,
+        }
+    }
+
+    pub fn use_dimensions(&self, raw: &mut RawTransform) {
+        self.width.use_dimension(&mut raw.width);
+        self.height.use_dimension(&mut raw.height);
+    }
+}
+
+impl RawTransform {
+    pub fn new() -> RawTransform {
+        RawTransform {
+            x: 0,
+            y: 0,
+            width: 0,
+            height: 0,
+        }
+    }
+}
+
+impl Dimension {
+    pub fn use_dimension(&self, r: &mut u16) {
+        match self {
+            Dimension::Auto => {}
+            Dimension::Const(n) => *r = *n,
+        }
+    }
+}