From 497446944c78bcf598e8ac8dcdff6c0d0433d844 Mon Sep 17 00:00:00 2001
From: Laurenz <laurmaedje@gmail.com>
Date: Mon, 2 Dec 2024 13:48:45 +0100
Subject: [PATCH] Add `document.description` field

---
 crates/typst-library/src/model/document.rs | 10 ++++++++++
 crates/typst-pdf/src/catalog.rs            |  5 +++++
 2 files changed, 15 insertions(+)

diff --git a/crates/typst-library/src/model/document.rs b/crates/typst-library/src/model/document.rs
index c333dff33..5124b2487 100644
--- a/crates/typst-library/src/model/document.rs
+++ b/crates/typst-library/src/model/document.rs
@@ -37,6 +37,10 @@ pub struct DocumentElem {
     #[ghost]
     pub author: Author,
 
+    /// The document's description.
+    #[ghost]
+    pub description: Option<Content>,
+
     /// The document's keywords.
     #[ghost]
     pub keywords: Keywords,
@@ -91,6 +95,8 @@ pub struct DocumentInfo {
     pub title: Option<EcoString>,
     /// The document's author.
     pub author: Vec<EcoString>,
+    /// The document's description.
+    pub description: Option<EcoString>,
     /// The document's keywords.
     pub keywords: Vec<EcoString>,
     /// The document's creation date.
@@ -111,6 +117,10 @@ impl DocumentInfo {
         if has(<DocumentElem as Fields>::Enum::Author) {
             self.author = DocumentElem::author_in(chain).0;
         }
+        if has(<DocumentElem as Fields>::Enum::Description) {
+            self.description =
+                DocumentElem::description_in(chain).map(|content| content.plain_text());
+        }
         if has(<DocumentElem as Fields>::Enum::Keywords) {
             self.keywords = DocumentElem::keywords_in(chain).0;
         }
diff --git a/crates/typst-pdf/src/catalog.rs b/crates/typst-pdf/src/catalog.rs
index 35c5ce681..753b8cb6b 100644
--- a/crates/typst-pdf/src/catalog.rs
+++ b/crates/typst-pdf/src/catalog.rs
@@ -48,6 +48,11 @@ pub fn write_catalog(
         xmp.title([(None, title.as_str())]);
     }
 
+    if let Some(description) = &ctx.document.info.description {
+        info.subject(TextStr::trimmed(description));
+        xmp.description([(None, description.as_str())]);
+    }
+
     let authors = &ctx.document.info.author;
     if !authors.is_empty() {
         // Turns out that if the authors are given in both the document