initial text impl

src/layout/orientation.rs

@@ -0,0 +1,49 @@
+use crate::layout::{Vec2, vec2};
+
+#[derive(Clone, Copy, Debug)]
+pub enum Corner {
+    TopLeft,
+    TopRight,
+    BotLeft,
+    BotRight,
+}
+
+impl Corner {
+    pub const fn anchor(&self) -> Vec2 {
+        match self {
+            Corner::TopLeft => vec2(0.0, 0.0),
+            Corner::TopRight => vec2(1.0, 0.0),
+            Corner::BotLeft => vec2(0.0, 1.0),
+            Corner::BotRight => vec2(1.0, 1.0),
+        }
+    }
+}
+
+#[derive(Copy, Clone, Eq, PartialEq)]
+pub enum Axis {
+    X,
+    Y,
+}
+
+#[derive(Clone, Copy, Eq, PartialEq)]
+pub struct Dir {
+    pub axis: Axis,
+    pub sign: Sign,
+}
+
+impl Dir {
+    pub const fn new(axis: Axis, dir: Sign) -> Self {
+        Self { axis, sign: dir }
+    }
+
+    pub const LEFT: Self = Self::new(Axis::X, Sign::Neg);
+    pub const RIGHT: Self = Self::new(Axis::X, Sign::Pos);
+    pub const UP: Self = Self::new(Axis::Y, Sign::Neg);
+    pub const DOWN: Self = Self::new(Axis::Y, Sign::Pos);
+}
+
+#[derive(Clone, Copy, Eq, PartialEq)]
+pub enum Sign {
+    Neg,
+    Pos,
+}