From 07e89ad30ab97d7e480033f320a5a7964f5fbed1 Mon Sep 17 00:00:00 2001
From: "Dylan M. Taylor" <dylan@dylanmtaylor.com>
Date: Sat, 14 Nov 2026 05:51:17 +0000
Subject: [PATCH] fix(idml): preserve transforms and text variable values

---
 crates/idml/src/model/document.rs |  5 +++--
 crates/idml/src/value.rs          | 10 +++++++++-
 crates/idml/tests/model.rs        | 14 ++++++++++++++
 crates/idml/tests/value.rs        |  2 ++
 4 files changed, 28 insertions(+), 3 deletions(-)

diff --git a/crates/idml/src/model/document.rs b/crates/idml/src/model/document.rs
index 3937a4501..830b95a3f 100644
--- a/crates/idml/src/model/document.rs
+++ b/crates/idml/src/model/document.rs
@@ -346,11 +346,12 @@ impl TextVariableValues {
                 settings: preference.map(|child| child.attrs.clone()).unwrap_or_default(),
             },
         };
+        let text = |key: &str| preference.and_then(|child| child.attr(key)).or_else(|| values.get(key)).unwrap_or("").to_owned();
         Self {
             self_id: values.self_id().map(str::to_owned),
             name: values.get("Name").unwrap_or("").to_owned(),
-            before: values.get("TextBefore").unwrap_or("").to_owned(),
-            after: values.get("TextAfter").unwrap_or("").to_owned(),
+            before: text("TextBefore"),
+            after: text("TextAfter"),
             kind,
         }
     }
diff --git a/crates/idml/src/value.rs b/crates/idml/src/value.rs
index cb54644db..ab09cbaec 100644
--- a/crates/idml/src/value.rs
+++ b/crates/idml/src/value.rs
@@ -30,7 +30,15 @@ pub fn nums(s: &str) -> Vec<f64> {
 /// An `ItemTransform`: the six coefficients `a b c d tx ty`, or `None` when the value is not
 /// six finite numbers.
 pub fn matrix(s: &str) -> Option<[f64; 6]> {
-    <[f64; 6]>::try_from(nums(s)).ok()
+    let mut tokens = s.split_whitespace();
+    let mut matrix = [0.0_f64; 6];
+    for value in &mut matrix {
+        *value = tokens.next()?.parse().ok()?;
+        if !value.is_finite() {
+            return None;
+        }
+    }
+    tokens.next().is_none().then_some(matrix)
 }
 
 /// A transform as an `ItemTransform` value.
diff --git a/crates/idml/tests/model.rs b/crates/idml/tests/model.rs
index 98c94df1a..075a77c82 100644
--- a/crates/idml/tests/model.rs
+++ b/crates/idml/tests/model.rs
@@ -266,3 +266,17 @@ fn deeply_nested_groups_are_read_and_walked() {
     let again = Spread::from_el(&parse_part(&part_xml(&s.to_el())).unwrap());
     assert_eq!(again, s);
 }
+
+#[test]
+fn text_variable_decoration_uses_preference_and_falls_back_to_legacy_root_values() {
+    let preferred = parse_part(
+        br#"<TextVariable Name="Last Page Number" VariableType="LastPageNumberType" TextBefore="legacy " TextAfter=" legacy"><PageNumberVariablePreference TextBefore="of " TextAfter=" pages" Scope="SectionScope"/></TextVariable>"#,
+    )
+    .unwrap();
+    let variable = craft_idml::model::TextVariableValues::from_el(&preferred);
+    assert_eq!((variable.before.as_str(), variable.after.as_str()), ("of ", " pages"));
+
+    let legacy = parse_part(br#"<TextVariable Name="Last Page Number" TextBefore="of " TextAfter=" pages"/>"#).unwrap();
+    let variable = craft_idml::model::TextVariableValues::from_el(&legacy);
+    assert_eq!((variable.before.as_str(), variable.after.as_str()), ("of ", " pages"));
+}
diff --git a/crates/idml/tests/value.rs b/crates/idml/tests/value.rs
index 75ef55a08..236c13286 100644
--- a/crates/idml/tests/value.rs
+++ b/crates/idml/tests/value.rs
@@ -25,6 +25,8 @@ fn transforms_and_points() {
     assert_eq!(matrix("1 0 0 1 36"), None);
     assert_eq!(matrix("1 0 0 1 36 72 9"), None);
     assert_eq!(matrix("1 0 0 1 NaN 0"), None);
+    assert_eq!(matrix("0 1 x -1 0 0 5"), None, "invalid coefficients cannot shift later values");
+    assert_eq!(matrix("1e1000 0 0 1 0 0"), None, "non-finite coefficients are rejected");
     assert_eq!(matrix_str(&[1.0, 0.0, 0.0, 1.0, 36.0, -72.5]), "1 0 0 1 36 -72.5");
     assert_eq!(point("3 4"), Some((3.0, 4.0)));
     assert_eq!(point("3 4 5"), Some((3.0, 4.0)));