From 45b8dce220afd86f688fb2d184a29880e0acc162 Mon Sep 17 00:00:00 2001
From: MarekSpodBiedry <73122968+MarekSpodBiedry@users.noreply.github.com>
Date: Tue, 13 Oct 2026 17:33:35 +0200
Subject: [PATCH] Info: keep a property draft when another field or the side
 menu is clicked (#422)

---
 crates/ui-egui/src/backstage.rs       | 29 +++++++++++++++++---
 crates/ui-egui/src/backstage_tests.rs | 38 +++++++++++++++++++++++++++
 2 files changed, 63 insertions(+), 4 deletions(-)

diff --git a/crates/ui-egui/src/backstage.rs b/crates/ui-egui/src/backstage.rs
index f1d0fde3..2d2dba2a 100644
--- a/crates/ui-egui/src/backstage.rs
+++ b/crates/ui-egui/src/backstage.rs
@@ -353,6 +353,7 @@ pub fn show(app: &mut SlideApp, ui: &mut Ui) {
             }
             if nav_item(ui, *nav, &bs, index, &t).clicked() {
                 bs.focus = None;
+                commit_props(app, &bs);
                 match act(app, *nav, bs.page) {
                     None => out.close = true,
                     Some(p) => out.page = Some(p),
@@ -367,6 +368,7 @@ pub fn show(app: &mut SlideApp, ui: &mut Ui) {
             for (k, nav) in bottom.iter().enumerate().rev() {
                 if nav_item(ui, *nav, &bs, first_bottom + k, &t).clicked() {
                     bs.focus = None;
+                    commit_props(app, &bs);
                     match act(app, *nav, bs.page) {
                         None => out.close = true,
                         Some(p) => out.page = Some(p),
@@ -796,15 +798,16 @@ fn info(app: &mut SlideApp, ui: &mut Ui, bs: &mut Backstage) {
                     let Some(draft) = bs.props.get_mut(i) else { continue };
                     let l = ui.label(RichText::new(*label).color(t.text_dim));
                     let id = ui.make_persistent_id(("backstage_prop", *key));
-                    // Show the presentation's value unless the field is being edited (undo…).
-                    if !ui.ctx().memory(|m| m.has_focus(id)) {
-                        draft.clone_from(&saved);
-                    }
                     let resp = ui.add(egui::TextEdit::singleline(draft).id(id).hint_text(*hint).desired_width(300.0)).labelled_by(l.id);
                     if resp.lost_focus() && *draft != saved {
+                        // Commit first: a click on another field takes the focus before this one is drawn.
                         let mut p = serde_json::Map::new();
                         p.insert((*key).to_string(), json!(draft.clone()));
                         let _ = app.run("file.properties", Value::Object(p));
+                    } else if !resp.has_focus() && *draft != saved {
+                        // Show the presentation's value unless the field is being edited (undo...).
+                        draft.clone_from(&saved);
+                        ui.ctx().request_repaint();
                     }
                     ui.end_row();
                 }
@@ -814,6 +817,24 @@ fn info(app: &mut SlideApp, ui: &mut Ui, bs: &mut Backstage) {
     });
 }
 
+/// Commits what the Info page's property fields hold and the presentation does not: a side-menu
+/// action such as Save runs before the field that is being left is drawn again (#422).
+fn commit_props(app: &mut SlideApp, bs: &Backstage) {
+    if bs.page != Page::Info {
+        return;
+    }
+    let Ok(v) = app.session.execute("file.info", &json!({})) else { return };
+    let mut p = serde_json::Map::new();
+    for ((key, _, _), draft) in PROPERTIES.iter().zip(&bs.props) {
+        if v["properties"].get(*key).and_then(Value::as_str).unwrap_or("") != *draft {
+            p.insert((*key).to_string(), json!(draft));
+        }
+    }
+    if !p.is_empty() {
+        let _ = app.run("file.properties", Value::Object(p));
+    }
+}
+
 /// `1234567` → `1.2 MB`.
 pub fn format_bytes(b: u64) -> String {
     match b {
diff --git a/crates/ui-egui/src/backstage_tests.rs b/crates/ui-egui/src/backstage_tests.rs
index 115d782f..55871074 100644
--- a/crates/ui-egui/src/backstage_tests.rs
+++ b/crates/ui-egui/src/backstage_tests.rs
@@ -347,6 +347,44 @@ fn info_shows_and_edits_the_properties() {
     assert!(h.state().backstage_open());
 }
 
+/// Leaving a property field with a click on another field keeps what was typed.
+#[test]
+fn info_keeps_a_property_draft_when_another_field_is_clicked() {
+    let mut h = harness(new_app());
+    h.state_mut().run("app.backstage", json!({"page": "info"})).unwrap();
+    h.run_steps(3);
+    h.get_by_role_and_label(Role::TextInput, "Author").click();
+    h.run_steps(2);
+    h.get_by_role_and_label(Role::TextInput, "Author").type_text("Ada");
+    h.run_steps(2);
+    h.get_by_role_and_label(Role::TextInput, "Title").click();
+    h.run_steps(4);
+    assert_eq!(h.state().session.active().unwrap().doc.props.author, "Ada");
+}
+
+/// Save straight from a property field saves what was typed (the side menu acts before the field
+/// is drawn again).
+#[test]
+fn info_saves_a_property_draft_when_save_is_clicked() {
+    let dir = temp_dir("info-save");
+    let path = dir.join("Draft.pptx").to_string_lossy().to_string();
+    let mut s = Session::with_new();
+    s.execute("file.saveAs", &json!({"path": path})).unwrap();
+    let mut h = harness(SlideApp::new(s, Services::default()));
+    h.state_mut().run("app.backstage", json!({"page": "info"})).unwrap();
+    h.run_steps(3);
+    h.get_by_role_and_label(Role::TextInput, "Author").click();
+    h.run_steps(2);
+    h.get_by_role_and_label(Role::TextInput, "Author").type_text("Ada");
+    h.run_steps(2);
+    click_nav(&h, "Save");
+    h.run_steps(3);
+    let doc = h.state().session.active().unwrap();
+    assert_eq!(doc.doc.props.author, "Ada");
+    assert!(!doc.is_dirty(), "the author went into the saved file");
+    let _ = std::fs::remove_dir_all(&dir);
+}
+
 /// With nothing open the File tab is the start screen: Home, New and Open, no back arrow, and Esc
 /// has nowhere to go.
 #[test]