Add zooming in/out to PDF

brittle-keymap/src/actions.rs

@@ -51,6 +51,13 @@ pub const ACTION_DELETE: &str = "action.delete";
 /// Create a new item in the current context.
 pub const ACTION_NEW: &str = "action.new";
 
+// ── PDF viewer ────────────────────────────────────────────────────────────────
+
+/// Scroll the active PDF viewer to the next page.
+pub const PDF_PAGE_NEXT: &str = "pdf.page.next";
+/// Scroll the active PDF viewer to the previous page.
+pub const PDF_PAGE_PREV: &str = "pdf.page.prev";
+
 // ── Tabs ──────────────────────────────────────────────────────────────────────
 
 /// Cycle to the next tab (wraps around).

brittle-keymap/src/defaults.rs

@@ -44,9 +44,14 @@ pub fn default_bindings() -> BindingSet {
     bind!("zo"        => a::TREE_EXPAND);
     bind!("zc"        => a::TREE_COLLAPSE);
     bind!("za"        => a::TREE_TOGGLE);
-    // Arrow-style tree navigation: l expands, h collapses.
-    bind!("l"         => a::TREE_EXPAND);
-    bind!("h"         => a::TREE_COLLAPSE);
+
+    // ── Pane navigation ───────────────────────────────────────────────────────
+    bind!("h"         => a::FOCUS_PREV);
+    bind!("l"         => a::FOCUS_NEXT);
+
+    // ── PDF viewer ────────────────────────────────────────────────────────────
+    bind!("J"         => a::PDF_PAGE_NEXT);
+    bind!("K"         => a::PDF_PAGE_PREV);
 
     // ── Item actions ──────────────────────────────────────────────────────────
     bind!("<Enter>"   => a::ACTION_OPEN);
@@ -59,6 +64,7 @@ pub fn default_bindings() -> BindingSet {
     bind!("gt"        => a::TAB_NEXT);
     bind!("gT"        => a::TAB_PREV);
     bind!("q"         => a::TAB_CLOSE);
+    bind!("<C-w>"     => a::TAB_CLOSE);
 
     // ── Input modes ───────────────────────────────────────────────────────────
     bind!(":"         => a::MODE_COMMAND);
@@ -132,6 +138,33 @@ mod tests {
         );
     }
 
+    #[test]
+    fn zc_maps_to_tree_collapse() {
+        let d = defaults();
+        assert_eq!(
+            d.lookup(&[Key::char('z'), Key::char('c')]),
+            LookupResult::Exact(a::TREE_COLLAPSE.into())
+        );
+    }
+
+    #[test]
+    fn h_maps_to_focus_prev() {
+        let d = defaults();
+        assert_eq!(
+            d.lookup(&[Key::char('h')]),
+            LookupResult::Exact(a::FOCUS_PREV.into())
+        );
+    }
+
+    #[test]
+    fn l_maps_to_focus_next() {
+        let d = defaults();
+        assert_eq!(
+            d.lookup(&[Key::char('l')]),
+            LookupResult::Exact(a::FOCUS_NEXT.into())
+        );
+    }
+
     #[test]
     fn colon_maps_to_mode_command() {
         let d = defaults();