From b716700b61b229e2b703b892d3e047d84633d982 Mon Sep 17 00:00:00 2001
From: Charlie Moog <moogcharlie@gmail.com>
Date: Thu, 2 Nov 2023 05:12:07 -0500
Subject: Derive PDF instance id from content hash (#2552)

---
 crates/typst/Cargo.toml            | 2 +-
 crates/typst/src/export/pdf/mod.rs | 3 +--
 2 files changed, 2 insertions(+), 3 deletions(-)

(limited to 'crates')

diff --git a/crates/typst/Cargo.toml b/crates/typst/Cargo.toml
index e0058a86..c6c97398 100644
--- a/crates/typst/Cargo.toml
+++ b/crates/typst/Cargo.toml
@@ -31,7 +31,7 @@ kurbo = "0.9"
 log = "0.4"
 miniz_oxide = "0.7"
 once_cell = "1"
-pdf-writer = "0.9.1"
+pdf-writer = "0.9.2"
 pixglyph = "0.2"
 palette = { version = "0.7.3", default-features = false, features = ["approx", "libm"] }
 regex = "1"
diff --git a/crates/typst/src/export/pdf/mod.rs b/crates/typst/src/export/pdf/mod.rs
index 91fce588..51ed6d92 100644
--- a/crates/typst/src/export/pdf/mod.rs
+++ b/crates/typst/src/export/pdf/mod.rs
@@ -207,8 +207,7 @@ fn write_catalog(ctx: &mut PdfContext, ident: Option<&str>, timestamp: Option<Da
 
     // A unique ID for this instance of the document. Changes if anything
     // changes in the frames.
-    let instance_id =
-        hash_base64(&(&ctx.document, ctx.document.date.unwrap_or(timestamp)));
+    let instance_id = hash_base64(&ctx.pdf.as_bytes());
 
     if let Some(ident) = ident {
         // A unique ID for the document that stays stable across compilations.
-- 
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