add Ctrl+B toggle to show/hide the functions pane

- action_toggle_functions: collapse/restore left pane, disasm takes full width;
  focus follows (disasm when hidden, table when shown)
- pilot test covers the toggle (11/11)

2 files changed, 24 insertions, 1 deletions

diff --git a/idatui/app.py b/idatui/app.py
index 81e3fac..a91b3f0 100644
--- a/idatui/app.py
+++ b/idatui/app.py
@@ -242,6 +242,7 @@ class IdaTui(App):
         Binding("q", "quit", "Quit"),
         Binding("slash", "filter", "Filter"),
         Binding("g", "goto", "Goto"),
+        Binding("ctrl+b", "toggle_functions", "Names"),
         Binding("tab", "toggle_focus", "Switch pane"),
         Binding("escape", "back", "Back"),
     ]
@@ -341,6 +342,15 @@ class IdaTui(App):
             table.add_row(f"{f.addr:08X}", f.name, f"{f.size:#x}", key=str(f.addr))
 
     # -- actions ----------------------------------------------------------- #
+    def action_toggle_functions(self) -> None:
+        """Show/hide the functions pane; give the disasm view all the width."""
+        left = self.query_one("#left", FunctionsPanel)
+        left.display = not left.display
+        if not left.display:
+            self.query_one(DisasmView).focus()
+        else:
+            self.query_one("#func-table", DataTable).focus()
+
     def action_toggle_focus(self) -> None:
         table = self.query_one("#func-table", DataTable)
         if self.focused is table:
diff --git a/tests/test_tui.py b/tests/test_tui.py
index 752f72f..8769321 100644
--- a/tests/test_tui.py
+++ b/tests/test_tui.py
@@ -12,7 +12,7 @@ import os
 import sys
 
 sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
-from idatui.app import DisasmView, IdaTui  # noqa: E402
+from idatui.app import DisasmView, FunctionsPanel, IdaTui  # noqa: E402
 from textual.widgets import DataTable, Static  # noqa: E402
 
 PASS = FAIL = 0
@@ -111,6 +111,19 @@ async def run(db):
         )
         check("filter narrowed the list", filtered, f"rows={table.row_count} of {nfuncs}")
 
+        # Toggle the functions pane show/hide.
+        left = app.query_one("#left", FunctionsPanel)
+        await pilot.press("ctrl+b")
+        await pilot.pause(0.1)
+        check("ctrl+b hides functions pane + focuses disasm",
+              not left.display and isinstance(app.focused, DisasmView),
+              f"display={left.display} focus={type(app.focused).__name__}")
+        await pilot.press("ctrl+b")
+        await pilot.pause(0.1)
+        check("ctrl+b again restores pane + focuses table",
+              left.display and isinstance(app.focused, DataTable),
+              f"display={left.display} focus={type(app.focused).__name__}")
+
 
 def main(argv):
     db = None