Slides: Ctrl+A in the slide pane selects every slide (#188)

The UI remembers whether the last press landed in the thumbnail pane (the sorter always counts) and passes scope slides to edit.selectAll in that case.

crates/ui-egui/src/lib.rs

@@ -209,6 +209,8 @@ pub struct SlideApp {
     pub(crate) notes_buf: (u64, usize, String),
     /// Thumbnail pane drag (slide index, current drop index).
     pub(crate) thumb_drag: Option<(usize, usize)>,
+    /// The slide thumbnail pane was the last thing clicked, so ⌘A selects slides, not shapes.
+    pub(crate) slides_focused: bool,
 }
 
 impl SlideApp {
@@ -244,6 +246,7 @@ impl SlideApp {
             quit_confirmed: false,
             notes_buf: (0, usize::MAX, String::new()),
             thumb_drag: None,
+            slides_focused: false,
         }
     }
 
@@ -365,6 +368,12 @@ impl SlideApp {
         Ok(Value::Null)
     }
 
+    /// Whether ⌘A should act on the slide list: always in the sorter, in Normal view once the
+    /// thumbnail pane has been clicked.
+    pub(crate) fn slides_list_focused(&self) -> bool {
+        self.ui.view == ViewMode::Sorter || (self.ui.view == ViewMode::Normal && self.slides_focused)
+    }
+
     pub fn start_show(&mut self, from: usize, reading: bool) {
         self.media.stop_owned(media::Owner::Editor);
         if let Some(d) = self.session.active() {
@@ -938,4 +947,46 @@ mod tests {
         app.run("app.home", json!({})).unwrap();
         assert!(!app.home_open() && app.home.is_none(), "with nothing open the start screen shows anyway");
     }
+
+    /// #188: Ctrl/Cmd+A with the slide thumbnail pane focused selects every slide; with the
+    /// canvas focused it still selects shapes.
+    #[test]
+    fn select_all_follows_the_focused_pane() {
+        let mut harness = egui_kittest::Harness::builder().with_size(egui::vec2(1200.0, 800.0)).build_ui_state(
+            |ui, app: &mut SlideApp| {
+                app.logic(ui.ctx());
+                app.ui(ui);
+            },
+            SlideApp::new(Session::with_new(), Services::default()),
+        );
+        harness.run_steps(2);
+        for _ in 0..2 {
+            harness.state_mut().run("slide.new", json!({})).unwrap();
+        }
+        harness.state_mut().run("slide.go", json!({"index": 0})).unwrap();
+        harness.run_steps(3);
+        let click = |h: &mut egui_kittest::Harness<'_, SlideApp>, pos: egui::Pos2| {
+            h.event(egui::Event::PointerMoved(pos));
+            for pressed in [true, false] {
+                h.event(egui::Event::PointerButton { pos, button: egui::PointerButton::Primary, pressed, modifiers: egui::Modifiers::NONE });
+            }
+            h.run_steps(2);
+        };
+        // Press in the thumbnail pane, then Cmd+A.
+        let w = harness.state().ui.thumbs_width;
+        click(&mut harness, egui::pos2(w / 2.0, 300.0));
+        assert!(harness.state().slides_focused);
+        harness.key_press_modifiers(egui::Modifiers::COMMAND, egui::Key::A);
+        harness.run_steps(2);
+        let st = harness.state().session.active().unwrap();
+        assert_eq!(st.selection.slides.len(), 3, "every slide is selected");
+
+        // A press on the canvas moves focus away: Cmd+A selects shapes again.
+        click(&mut harness, egui::pos2(700.0, 400.0));
+        assert!(!harness.state().slides_focused);
+        harness.key_press_modifiers(egui::Modifiers::COMMAND, egui::Key::A);
+        harness.run_steps(2);
+        let st = harness.state().session.active().unwrap();
+        assert!(!st.selection.shapes.is_empty(), "canvas select all picks the shapes");
+    }
 }

crates/ui-egui/src/menus.rs

@@ -10,6 +10,11 @@ use crate::theme::{self, Tokens};
 /// Shortcuts the UI handles itself (views, show, zoom, palette, file dialogs). True when consumed.
 pub fn ui_shortcut(app: &mut SlideApp, key: egui::Key, m: Mods) -> bool {
     use egui::Key::*;
+    if key == A && m.cmd && !m.shift && !m.alt && app.slides_list_focused() {
+        // The engine can't see which pane has focus, so the UI says so through the scope param.
+        let _ = app.run("edit.selectAll", json!({"scope": "slides"}));
+        return true;
+    }
     let id = match (key, m.cmd, m.shift, m.alt) {
         (F5, _, false, _) => {
             app.start_show(0, false);

crates/ui-egui/src/thumbs.rs

@@ -11,7 +11,7 @@ use crate::theme::{self, Tokens};
 pub fn show(app: &mut SlideApp, ui: &mut Ui) {
     let t = Tokens::get(ui.ctx());
     let in_master = app.session.active().is_some_and(|d| d.selection.target != Target::Slides);
-    egui::Panel::left("thumbs")
+    let panel = egui::Panel::left("thumbs")
         .resizable(true)
         .default_size(app.ui.thumbs_width)
         .size_range(150.0..=420.0)
@@ -28,6 +28,10 @@ pub fn show(app: &mut SlideApp, ui: &mut Ui) {
                 ui.add_space(20.0);
             });
         });
+    // Focus follows the last press: inside the pane keeps it, anywhere else (canvas, ribbon) drops it.
+    if let Some(pos) = ui.input(|i| if i.pointer.primary_pressed() { i.pointer.interact_pos() } else { None }) {
+        app.slides_focused = panel.response.rect.contains(pos);
+    }
 }
 
 fn list(app: &mut SlideApp, ui: &mut Ui) {