Start & end alignment

1 files changed, 49 insertions, 0 deletions

diff --git a/src/eval/raw.rs b/src/eval/raw.rs
new file mode 100644
index 00000000..337638f9
--- /dev/null
+++ b/src/eval/raw.rs
@@ -0,0 +1,49 @@
+use std::fmt::{self, Debug, Formatter};
+
+use super::{Resolve, StyleChain};
+use crate::geom::{Align, SpecAxis};
+use crate::library::text::ParNode;
+
+/// The unresolved alignment representation.
+#[derive(Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Hash)]
+pub enum RawAlign {
+    /// Align at the start side of the text direction.
+    Start,
+    /// Align at the end side of the text direction.
+    End,
+    /// Align at a specific alignment.
+    Specific(Align),
+}
+
+impl Resolve for RawAlign {
+    type Output = Align;
+
+    fn resolve(self, styles: StyleChain) -> Self::Output {
+        let dir = styles.get(ParNode::DIR);
+        match self {
+            Self::Start => dir.start().into(),
+            Self::End => dir.end().into(),
+            Self::Specific(align) => align,
+        }
+    }
+}
+
+impl RawAlign {
+    /// The axis this alignment belongs to.
+    pub const fn axis(self) -> SpecAxis {
+        match self {
+            Self::Start | Self::End => SpecAxis::Horizontal,
+            Self::Specific(align) => align.axis(),
+        }
+    }
+}
+
+impl Debug for RawAlign {
+    fn fmt(&self, f: &mut Formatter) -> fmt::Result {
+        match self {
+            Self::Start => f.pad("left"),
+            Self::End => f.pad("center"),
+            Self::Specific(align) => align.fmt(f),
+        }
+    }
+}