Non-fatal argument parsing 🌋

1 files changed, 64 insertions, 0 deletions

diff --git a/src/library/page.rs b/src/library/page.rs
new file mode 100644
index 00000000..25f81bc1
--- /dev/null
+++ b/src/library/page.rs
@@ -0,0 +1,64 @@
+use crate::style::{Paper, PaperClass};
+use super::*;
+
+
+function! {
+    /// `page.size`: Set the size of pages.
+    #[derive(Debug, Clone, PartialEq)]
+    pub struct PageSizeFunc {
+        paper: Option<Paper>,
+        extents: AxisMap<Size>,
+        flip: bool,
+    }
+
+    parse(header, body, ctx, errors, decos) {
+        body!(nope: body, errors);
+        PageSizeFunc {
+            paper: header.args.pos.get::<Paper>(errors),
+            extents: AxisMap::parse::<ExtentKey, Size>(errors, &mut header.args.key),
+            flip: header.args.key.get::<bool>(errors, "flip").unwrap_or(false),
+        }
+    }
+
+    layout(self, ctx, errors) {
+        let mut style = ctx.style.page;
+
+        if let Some(paper) = self.paper {
+            style.class = paper.class;
+            style.dimensions = paper.dimensions;
+        } else {
+            style.class = PaperClass::Custom;
+        }
+
+        let map = self.extents.dedup(errors, ctx.axes);
+        map.with(Horizontal, |&width| style.dimensions.x = width);
+        map.with(Vertical, |&height| style.dimensions.y = height);
+
+        if self.flip {
+            style.dimensions.swap();
+        }
+
+        vec![SetPageStyle(style)]
+    }
+}
+
+function! {
+    /// `page.margins`: Sets the page margins.
+    #[derive(Debug, Clone, PartialEq)]
+    pub struct PageMarginsFunc {
+        padding: PaddingMap,
+    }
+
+    parse(header, body, ctx, errors, decos) {
+        body!(nope: body, errors);
+        PageMarginsFunc {
+            padding: PaddingMap::parse(errors, &mut header.args),
+        }
+    }
+
+    layout(self, ctx, errors) {
+        let mut style = ctx.style.page;
+        self.padding.apply(errors, ctx.axes, &mut style.margins);
+        vec![SetPageStyle(style)]
+    }
+}