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

ui/views/controls/menu/menu_event_dispatcher_linux.cc

 // Copyright 2014 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_event_dispatcher_linux.h"
 
 #include "base/memory/scoped_ptr.h"
 #include "ui/aura/window.h"
 #include "ui/events/event_utils.h"
-#include "ui/events/keycodes/keyboard_code_conversion.h"
-#include "ui/events/keycodes/keyboard_codes.h"
 #include "ui/views/controls/menu/menu_controller.h"
 #include "ui/views/widget/widget.h"
 
 namespace views {
 namespace internal {
 
 MenuEventDispatcher::MenuEventDispatcher(MenuController* controller)
     : menu_controller_(controller) {}
 
 MenuEventDispatcher::~MenuEventDispatcher() {}
 
 bool MenuEventDispatcher::CanDispatchEvent(const ui::PlatformEvent& event) {
   return true;
 }
 
 uint32_t MenuEventDispatcher::DispatchEvent(const ui::PlatformEvent& event) {
-  bool should_quit = false;
-  bool should_perform_default = true;
-  bool should_process_event = true;
-
   // Check if the event should be handled.
   scoped_ptr<ui::Event> ui_event(ui::EventFromNative(event));
+  aura::Window* target_window = nullptr;
   if (ui_event && menu_controller_->owner()) {
     aura::Window* menu_window = menu_controller_->owner()->GetNativeWindow();
-    aura::Window* target_window = static_cast<aura::Window*>(
-        static_cast<ui::EventTarget*>(menu_window->GetRootWindow())->
-            GetEventTargeter()->FindTargetForEvent(menu_window,
-                                                   ui_event.get()));
-    // TODO(flackr): The event shouldn't be handled if target_window is not
-    // menu_window, however the event targeter does not properly target the
-    // open menu. For now, we allow targeters to prevent handling by the menu.
-    if (!target_window)
-      should_process_event = false;
+    target_window = static_cast<aura::Window*>(
+        static_cast<ui::EventTarget*>(menu_window->GetRootWindow())
+            ->GetEventTargeter()
+            ->FindTargetForEvent(menu_window, ui_event.get()));
   }
 
-  if (menu_controller_->exit_type() == MenuController::EXIT_ALL ||
-      menu_controller_->exit_type() == MenuController::EXIT_DESTROYED) {
-    should_quit = true;
-  } else if (ui_event && should_process_event) {
-    switch (ui_event->type()) {
-      case ui::ET_KEY_PRESSED: {
-        ui::KeyEvent* key_event = static_cast<ui::KeyEvent*>(ui_event.get());
-        if (!menu_controller_->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 (menu_controller_->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;
-    }
+  // TODO(flackr): The event shouldn't be handled if target_window is not
+  // menu_window, however the event targeter does not properly target the
+  // open menu. For now, we allow targeters to prevent handling by the menu.
+  if (!target_window) {
+    if (menu_controller_->exit_type() != MenuController::EXIT_NONE)
+      menu_controller_->TerminateNestedMessageLoop();
+    return ui::POST_DISPATCH_PERFORM_DEFAULT;
   }
 
-  if (should_quit || menu_controller_->exit_type() != MenuController::EXIT_NONE)
-    menu_controller_->TerminateNestedMessageLoop();
-
-  return should_perform_default ? ui::POST_DISPATCH_PERFORM_DEFAULT
-                                : ui::POST_DISPATCH_NONE;
+  DCHECK(ui_event);
+  return menu_controller_->OnWillDispatchEvent(*ui_event.get());
 }
 
 }  // namespace internal
 }  // namespace views