From 652da14a0b4959c2ba0604cbf0ae87a032581403 Mon Sep 17 00:00:00 2001
From: "Dylan M. Taylor" <dylan@dylanmtaylor.com>
Date: Fri, 13 Nov 2026 09:06:44 -0500
Subject: [PATCH] Classify IDML graphic MIME fallback in shared model

---
 crates/idml/src/model/spread.rs | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/crates/idml/src/model/spread.rs b/crates/idml/src/model/spread.rs
index f1bc0068a..d05205ce0 100644
--- a/crates/idml/src/model/spread.rs
+++ b/crates/idml/src/model/spread.rs
@@ -967,6 +967,19 @@ impl Graphic {
         self.values.num("FillTint")
     }
 
+    /// The MIME fallback when a linked graphic's bytes cannot be sniffed.
+    pub fn fallback_mime(&self) -> &'static str {
+        let format = self.link().and_then(Link::format).unwrap_or("");
+        match format {
+            value if value.contains("EPS") || self.kind == GraphicKind::EPS => "application/postscript",
+            value if value.contains("JPEG") => "image/jpeg",
+            value if value.contains("TIFF") => "image/tiff",
+            value if value.contains("PDF") || self.kind == GraphicKind::PDF => "application/pdf",
+            value if value.contains("GIF") => "image/gif",
+            _ => "image/png",
+        }
+    }
+
     pub fn layer_options(&self) -> Option<GraphicLayerOptions> {
         self.children
             .iter()