From 45f06f50da6c32fd2f76b8a9de0673d5dd2e3675 Mon Sep 17 00:00:00 2001
From: Marco Arnulfo <marcoarnulfo1@gmail.com>
Date: Fri, 23 Oct 2026 22:05:24 +0200
Subject: [PATCH] Conditional formatting: New Rule keeps the range it was
 opened for when pointing on another sheet (#2348)

---
 crates/ui-egui/src/dialogs.rs           | 15 +++++++++++++--
 crates/ui-egui/tests/it/cf_rule_pick.rs | 17 +++++++++++++++++
 2 files changed, 30 insertions(+), 2 deletions(-)

diff --git a/crates/ui-egui/src/dialogs.rs b/crates/ui-egui/src/dialogs.rs
index 8be7f55cb..95855e56a 100644
--- a/crates/ui-egui/src/dialogs.rs
+++ b/crates/ui-egui/src/dialogs.rs
@@ -63,6 +63,9 @@ struct RefPick {
     anchor: CellRef,
     /// Give the box the keyboard back, caret after the reference, on the next frame.
     refocus: bool,
+    /// The selection the rule applies to, fixed when the dialog opened as Excel's "Applies to":
+    /// pointing on another sheet must not move the rule there.
+    applies_to: String,
 }
 
 impl Dialog {
@@ -749,8 +752,12 @@ impl Dialog {
                     json!({"preset": "lightRedFillDarkRedText", "period": "today"}),
                 );
                 if ty == "expression" {
-                    let sheet = app.session.active().map(|doc| doc.wb.active_sheet).unwrap_or(0);
-                    d.pick = Some(RefPick { key: "formula", sheet, caret: 0, point: None, anchor: CellRef::new(0, 0), refocus: false });
+                    let (sheet, applies_to) = app
+                        .session
+                        .active()
+                        .map(|doc| (doc.wb.active_sheet, doc.selection.ranges.iter().map(RangeRef::a1).collect::<Vec<_>>().join(",")))
+                        .unwrap_or_default();
+                    d.pick = Some(RefPick { key: "formula", sheet, caret: 0, point: None, anchor: CellRef::new(0, 0), refocus: false, applies_to });
                 }
                 d.values.insert("type".into(), json!(ty));
                 d.values.insert("operator".into(), p("operator"));
@@ -1177,6 +1184,10 @@ pub(crate) fn build_params(d: &Dialog) -> Json {
                 rule.insert(k.clone(), val.clone());
             }
             v = json!({"rule": Json::Object(rule)});
+            if let Some(pick) = d.pick.as_ref().filter(|pick| !pick.applies_to.is_empty()) {
+                v["sheet"] = json!(pick.sheet);
+                v["range"] = json!(pick.applies_to);
+            }
         }
         "series" => {
             if let Some(s) = d.values.get("stop").and_then(Json::as_str).and_then(|s| s.parse::<f64>().ok()) {
diff --git a/crates/ui-egui/tests/it/cf_rule_pick.rs b/crates/ui-egui/tests/it/cf_rule_pick.rs
index dc004ff25..642a91a18 100644
--- a/crates/ui-egui/tests/it/cf_rule_pick.rs
+++ b/crates/ui-egui/tests/it/cf_rule_pick.rs
@@ -158,3 +158,20 @@ fn other_dialogs_leave_grid_clicks_alone() {
     click(&mut h, "B2");
     assert_eq!(selection(&h), "B2", "a box that is not a formula does not take references");
 }
+
+#[test]
+fn pointing_on_another_sheet_keeps_the_rule_on_the_sheet_it_was_opened_for() {
+    let mut h = harness();
+    type_text(&mut h, "=");
+    h.state_mut().session.execute("sheet.activate", json!({"sheet": 1})).unwrap();
+    h.run_steps(3);
+    click(&mut h, "A1");
+    assert_eq!(formula(&h), "=Sheet2!$A$1");
+    h.key_press(Key::Enter);
+    h.run_steps(4);
+    assert!(h.state().dialog.is_none(), "Enter confirmed the rule");
+    let wb = &h.state().session.active().unwrap().wb;
+    assert!(wb.sheet(1).unwrap().cond_formats.is_empty(), "nothing lands on the sheet pointed at");
+    let cf = wb.sheet(0).unwrap().cond_formats.last().expect("the rule is on the sheet the dialog was opened on");
+    assert_eq!(cf.ranges.iter().map(|r| r.a1()).collect::<Vec<_>>(), ["F8:G9"]);
+}