MacViews: Intercept events for Menus (after AppKit has interpreted keystrokes)

ui/views/controls/menu/menu_controller.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/views/controls/menu/menu_controller.h"
 
 #include "base/i18n/case_conversion.h"
 #include "base/i18n/rtl.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/time/time.h"
 #include "ui/base/dragdrop/drag_utils.h"
 #include "ui/base/dragdrop/os_exchange_data.h"
 #include "ui/events/event.h"
 #include "ui/events/event_utils.h"
+#include "ui/events/keycodes/keyboard_code_conversion.h"
 #include "ui/gfx/canvas.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/gfx/point.h"
 #include "ui/gfx/screen.h"
 #include "ui/gfx/vector2d.h"
 #include "ui/native_theme/native_theme.h"
 #include "ui/views/controls/button/menu_button.h"
 #include "ui/views/controls/menu/menu_config.h"
 #include "ui/views/controls/menu/menu_controller_delegate.h"
 #include "ui/views/controls/menu/menu_host_root_view.h"
@@ skipping 768 matching lines @@
 
 void MenuController::OnDragComplete(bool should_close) {
   DCHECK(drag_in_progress_);
   drag_in_progress_ = false;
   if (showing_ && should_close && GetActiveInstance() == this) {
     CloseAllNestedMenus();
     Cancel(EXIT_ALL);
   }
 }
 
+ui::PostDispatchAction MenuController::OnWillDispatchEvent(
+    const ui::Event& event) {
+  if (exit_type() == MenuController::EXIT_ALL ||
+      exit_type() == MenuController::EXIT_DESTROYED) {
+    TerminateNestedMessageLoop();
+    return ui::POST_DISPATCH_PERFORM_DEFAULT;
+  }
+
+  bool should_quit = false;
+  bool should_perform_default = true;
+  switch (event.type()) {
+    case ui::ET_KEY_PRESSED: {
+      const ui::KeyEvent& key_event = static_cast<const ui::KeyEvent&>(event);
+      if (!OnKeyDown(key_event.key_code())) {
+        should_quit = true;
+        should_perform_default = false;
+        break;
+      }
+
+      // Do not check mnemonics if the Alt or Ctrl modifiers are pressed.
+      int flags = key_event.flags();
+      if ((flags & (ui::EF_CONTROL_DOWN | ui::EF_ALT_DOWN)) == 0) {
+        char c = ui::GetCharacterFromKeyCode(key_event.key_code(), flags);
+        if (SelectByChar(c)) {
+          should_quit = true;
+          should_perform_default = false;
+          break;
+        }
+      }
+      should_quit = false;
+      should_perform_default = false;
+      break;
+    }
+    case ui::ET_KEY_RELEASED:
+      should_quit = false;
+      should_perform_default = false;
+      break;
+    default:
+      break;
+  }
+
+  if (should_quit || exit_type() != MenuController::EXIT_NONE)
+    TerminateNestedMessageLoop();
+
+  return should_perform_default ? ui::POST_DISPATCH_PERFORM_DEFAULT
+                                : ui::POST_DISPATCH_NONE;
+}
+
 void MenuController::UpdateSubmenuSelection(SubmenuView* submenu) {
   if (submenu->IsShowing()) {
     gfx::Point point = GetScreen()->GetCursorScreenPoint();
     const SubmenuView* root_submenu =
         submenu->GetMenuItem()->GetRootMenuItem()->GetSubmenu();
     View::ConvertPointFromScreen(
         root_submenu->GetWidget()->GetRootView(), &point);
     HandleMouseLocation(submenu, point);
   }
 }
@@ skipping 1490 matching lines @@
   }
 }
 
 gfx::Screen* MenuController::GetScreen() {
   Widget* root = owner_ ? owner_->GetTopLevelWidget() : NULL;
   return root ? gfx::Screen::GetScreenFor(root->GetNativeView())
               : gfx::Screen::GetNativeScreen();
 }
 
 }  // namespace views