Scripting: ParagraphJustification has After Effects' numbers (#3610)

After Effects 26.3 numbers MULTIPLE_JUSTIFICATIONS 7412, LEFT_JUSTIFY 7413,
RIGHT_JUSTIFY 7414, CENTER_JUSTIFY 7415, and the justified variants with
the last line left, right, centred and full 7416-7419. EffectCraft had
centre before right (and last-line centre before last-line right), so a
script setting 7414 got a centred paragraph instead of a right-aligned
one, silently.

crates/script/src/tests/paragraph_justification.rs

@@ -0,0 +1,48 @@
+//! `ParagraphJustification` has After Effects' numbers (26.3): MULTIPLE_JUSTIFICATIONS 7412,
+//! LEFT 7413, RIGHT 7414, CENTER 7415, then the justified variants with the last line left (7416),
+//! right (7417), centred (7418) and full (7419). A script that stores or compares the numbers gets
+//! the same paragraph in both applications.
+
+use serde_json::json;
+
+use super::{comp_named, ok, session};
+use effectcraft_engine::keyframe::{Justify, Value as KV};
+
+#[test]
+fn the_numbers_are_after_effects() {
+    let mut s = session();
+    let o = ok(
+        &mut s,
+        r#"
+        var P = ParagraphJustification;
+        [P.MULTIPLE_JUSTIFICATIONS, P.LEFT_JUSTIFY, P.RIGHT_JUSTIFY, P.CENTER_JUSTIFY, P.FULL_JUSTIFY_LASTLINE_LEFT,
+         P.FULL_JUSTIFY_LASTLINE_RIGHT, P.FULL_JUSTIFY_LASTLINE_CENTER, P.FULL_JUSTIFY_LASTLINE_FULL]
+        "#,
+    );
+    assert_eq!(o.result, json!([7412, 7413, 7414, 7415, 7416, 7417, 7418, 7419]));
+}
+
+#[test]
+fn each_number_sets_and_reads_its_paragraph() {
+    let mut s = session();
+    let o = ok(
+        &mut s,
+        r#"
+        var c = app.project.items.addComp("J", 200, 100, 1, 2, 30);
+        var t = c.layers.addText("ab");
+        var st = t.property("ADBE Text Properties").property("ADBE Text Document");
+        var back = [];
+        for (var n = 7413; n <= 7419; n++) {
+          var d = st.value; d.justification = n; st.setValue(d);
+          back.push(st.value.justification);
+        }
+        var d = st.value; d.justification = 7414; st.setValue(d);
+        back
+        "#,
+    );
+    assert_eq!(o.result, json!([7413, 7414, 7415, 7416, 7417, 7418, 7419]));
+    // 7414 is right-aligned, as in After Effects.
+    let (_, c) = comp_named(&s, "J");
+    let KV::Text(d) = &c.layers[0].props.prop("text/sourceText").unwrap().value else { panic!("not text") };
+    assert_eq!(d.justify, Justify::Right);
+}