Create test runner which renders layouts to images 🗺

1 files changed, 13 insertions, 0 deletions

diff --git a/src/doc.rs b/src/doc.rs
index d6a6096e..d83ae635 100644
--- a/src/doc.rs
+++ b/src/doc.rs
@@ -1,5 +1,6 @@
 //! Representation of typesetted documents.
 
+use std::io::{self, Write};
 use crate::size::{Size, Size2D};
 
 
@@ -31,3 +32,15 @@ pub enum LayoutAction {
     /// Write text starting at the current position.
     WriteText(String),
 }
+
+impl LayoutAction {
+    /// Serialize this layout action into a string representation.
+    pub fn serialize<W: Write>(&self, f: &mut W) -> io::Result<()> {
+        use LayoutAction::*;
+        match self {
+            MoveAbsolute(s) => write!(f, "m {:.4} {:.4}", s.x.to_pt(), s.y.to_pt()),
+            SetFont(i, s) => write!(f, "f {} {}", i, s),
+            WriteText(s) => write!(f, "w {}", s),
+        }
+    }
+}