Switch back to custom geometry types, unified with layout primitives 🏞

1 files changed, 90 insertions, 0 deletions

diff --git a/src/geom/gen.rs b/src/geom/gen.rs
new file mode 100644
index 00000000..d877713b
--- /dev/null
+++ b/src/geom/gen.rs
@@ -0,0 +1,90 @@
+use super::*;
+
+/// A container with a main and cross component.
+#[derive(Debug, Default, Copy, Clone, Eq, PartialEq)]
+pub struct Gen<T> {
+    /// The main component.
+    pub main: T,
+    /// The cross component.
+    pub cross: T,
+}
+
+impl<T> Gen<T> {
+    /// Create a new instance from the two components.
+    pub fn new(main: T, cross: T) -> Self {
+        Self { main, cross }
+    }
+}
+
+impl Gen<Length> {
+    /// The zero value.
+    pub const ZERO: Self = Self { main: Length::ZERO, cross: Length::ZERO };
+}
+
+impl<T> Get<GenAxis> for Gen<T> {
+    type Component = T;
+
+    fn get(self, axis: GenAxis) -> T {
+        match axis {
+            GenAxis::Main => self.main,
+            GenAxis::Cross => self.cross,
+        }
+    }
+
+    fn get_mut(&mut self, axis: GenAxis) -> &mut T {
+        match axis {
+            GenAxis::Main => &mut self.main,
+            GenAxis::Cross => &mut self.cross,
+        }
+    }
+}
+
+impl<T> Switch for Gen<T> {
+    type Other = Spec<T>;
+
+    fn switch(self, dirs: Gen<Dir>) -> Self::Other {
+        match dirs.main.axis() {
+            SpecAxis::Horizontal => Spec::new(self.main, self.cross),
+            SpecAxis::Vertical => Spec::new(self.cross, self.main),
+        }
+    }
+}
+
+/// The two generic layouting axes.
+#[derive(Debug, Copy, Clone, Eq, PartialEq)]
+pub enum GenAxis {
+    /// The axis pages and paragraphs are set along.
+    Main,
+    /// The axis words and lines are set along.
+    Cross,
+}
+
+impl GenAxis {
+    /// The other axis.
+    pub fn other(self) -> Self {
+        match self {
+            Self::Main => Self::Cross,
+            Self::Cross => Self::Main,
+        }
+    }
+}
+
+impl Switch for GenAxis {
+    type Other = SpecAxis;
+
+    fn switch(self, dirs: Gen<Dir>) -> Self::Other {
+        match self {
+            Self::Main => dirs.main.axis(),
+            Self::Cross => dirs.cross.axis(),
+        }
+    }
+}
+
+impl Display for GenAxis {
+    fn fmt(&self, f: &mut Formatter) -> fmt::Result {
+        f.pad(match self {
+            Self::Main => "main",
+            Self::Cross => "cross",
+        })
+    }
+}