Remove multiple inheritance from input_method_menu_button.h.

Currently chromeos::InputMethodMenuButton is derived from both StatusAreaButton and InputMethodMenu, which violates the Chrome coding guideline. This change removes the multiple inheritance by adding InputMethodMenu object to InputMethodMenuButton as a member variable.

BUG=chromium-os:7572
TEST=manually & try bot

Review URL: http://codereview.chromium.org/6262012

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@72467 0039d316-1c4b-4281-b951-d872f2087c98

5 files changed, 53 insertions, 13 deletions

diff --git a/chrome/browser/chromeos/login/keyboard_switch_menu.cc b/chrome/browser/chromeos/login/keyboard_switch_menu.cc
index 278d578..5e29ce5 100644
--- a/chrome/browser/chromeos/login/keyboard_switch_menu.cc
+++ b/chrome/browser/chromeos/login/keyboard_switch_menu.cc
@@ -12,6 +12,7 @@
 #include "chrome/browser/chromeos/status/status_area_host.h"
 #include "grit/generated_resources.h"
 #include "ui/base/l10n/l10n_util.h"
+#include "views/controls/button/menu_button.h"
 #include "views/widget/widget_gtk.h"
 
 namespace chromeos {
diff --git a/chrome/browser/chromeos/login/keyboard_switch_menu.h b/chrome/browser/chromeos/login/keyboard_switch_menu.h
index d2692fc..ed261f8 100644
--- a/chrome/browser/chromeos/login/keyboard_switch_menu.h
+++ b/chrome/browser/chromeos/login/keyboard_switch_menu.h
@@ -9,7 +9,7 @@
 #include <string>
 
 #include "base/scoped_ptr.h"
-#include "chrome/browser/chromeos/status/input_method_menu_button.h"
+#include "chrome/browser/chromeos/status/input_method_menu.h"
 #include "chrome/browser/chromeos/status/status_area_host.h"
 
 namespace chromeos {
diff --git a/chrome/browser/chromeos/status/input_method_menu.h b/chrome/browser/chromeos/status/input_method_menu.h
index 4045293..6227abf 100644
--- a/chrome/browser/chromeos/status/input_method_menu.h
+++ b/chrome/browser/chromeos/status/input_method_menu.h
@@ -97,10 +97,6 @@ class InputMethodMenu : public views::ViewMenuDelegate,
   static std::wstring GetTextForMenu(const InputMethodDescriptor& input_method);
 
  protected:
-  // Parses |input_method| and then calls UpdateUI().
-  void UpdateUIFromInputMethod(const InputMethodDescriptor& input_method,
-                               size_t num_active_input_methods);
-
   // Rebuilds model and menu2 objects in preparetion to open the menu.
   void PrepareForMenuOpen();
 
@@ -126,6 +122,10 @@ class InputMethodMenu : public views::ViewMenuDelegate,
   // customizing languages and input.
   virtual void OpenConfigUI() = 0;
 
+  // Parses |input_method| and then calls UpdateUI().
+  void UpdateUIFromInputMethod(const InputMethodDescriptor& input_method,
+                               size_t num_active_input_methods);
+
   // Rebuilds |model_|. This function should be called whenever
   // |input_method_descriptors_| is updated, or ImePropertiesChanged() is
   // called.
diff --git a/chrome/browser/chromeos/status/input_method_menu_button.cc b/chrome/browser/chromeos/status/input_method_menu_button.cc
index ff4db96..1767b49 100644
--- a/chrome/browser/chromeos/status/input_method_menu_button.cc
+++ b/chrome/browser/chromeos/status/input_method_menu_button.cc
@@ -32,6 +32,35 @@ const int kFontSizeDelta = 0;
 const int kFontSizeDelta = 1;
 #endif
 
+// A class which implements interfaces of chromeos::InputMethodMenu. This class
+// is just for avoiding multiple inheritance.
+class MenuImpl : public chromeos::InputMethodMenu {
+ public:
+  MenuImpl(chromeos::InputMethodMenuButton* button,
+           PrefService* pref_service,
+           chromeos::StatusAreaHost::ScreenMode screen_mode)
+      : InputMethodMenu(pref_service, screen_mode, false), button_(button) {}
+
+ private:
+  // InputMethodMenu implementation.
+  virtual void UpdateUI(const std::string& input_method_id,
+                        const std::wstring& name,
+                        const std::wstring& tooltip,
+                        size_t num_active_input_methods) {
+    button_->UpdateUI(input_method_id, name, tooltip, num_active_input_methods);
+  }
+  virtual bool ShouldSupportConfigUI() {
+    return button_->ShouldSupportConfigUI();
+  }
+  virtual void OpenConfigUI() {
+    button_->OpenConfigUI();
+  }
+  // The UI (views button) to which this class delegates all requests.
+  chromeos::InputMethodMenuButton* button_;
+
+  DISALLOW_COPY_AND_ASSIGN(MenuImpl);
+};
+
 }  // namespace
 
 namespace chromeos {
@@ -41,9 +70,7 @@ namespace chromeos {
 
 InputMethodMenuButton::InputMethodMenuButton(StatusAreaHost* host)
     : StatusAreaButton(this),
-      InputMethodMenu(GetPrefService(host),
-                      host->GetScreenMode(),
-                      false /* for_out_of_box_experience_dialog */),
+      menu_(new MenuImpl(this, GetPrefService(host), host->GetScreenMode())),
       host_(host) {
   set_border(NULL);
   set_use_menu_button_paint(true);
@@ -63,7 +90,7 @@ InputMethodMenuButton::InputMethodMenuButton(StatusAreaHost* host)
   // |pref_service| is not available (for example, unit tests) or |pref_service|
   // is available, but Chrome preferences are not available (for example,
   // initial OS boot).
-  InputMethodMenuButton::UpdateUI(hardware_keyboard_id, L"US", L"", 1);
+  UpdateUI(hardware_keyboard_id, L"US", L"", 1);
 }
 
 ////////////////////////////////////////////////////////////////////////////////
@@ -84,6 +111,8 @@ void InputMethodMenuButton::OnLocaleChanged() {
       chromeos::CrosLibrary::Get()->GetInputMethodLibrary();
   const InputMethodDescriptor& input_method =
       input_method_library->current_input_method();
+  const std::wstring name = InputMethodMenu::GetTextForIndicator(input_method);
+  const std::wstring tooltip = InputMethodMenu::GetTextForMenu(input_method);
 
   // In general, we should not call an input method API in the input method
   // button classes (status/input_menu_button*.cc) for performance reasons (see
@@ -92,14 +121,19 @@ void InputMethodMenuButton::OnLocaleChanged() {
   // to call GetNumActiveInputMethods here.
   const size_t num_active_input_methods =
       input_method_library->GetNumActiveInputMethods();
+  UpdateUI(input_method.id, name, tooltip, num_active_input_methods);
 
-  UpdateUIFromInputMethod(input_method, num_active_input_methods);
   Layout();
   SchedulePaint();
 }
 
 ////////////////////////////////////////////////////////////////////////////////
-// InputMethodMenu::InputMethodMenuHost implementation:
+// views::ViewMenuDelegate implementation:
+
+void InputMethodMenuButton::RunMenu(views::View* unused_source,
+                                    const gfx::Point& pt) {
+  menu_->RunMenu(unused_source, pt);
+}
 
 void InputMethodMenuButton::UpdateUI(const std::string& input_method_id,
                                      const std::wstring& name,
diff --git a/chrome/browser/chromeos/status/input_method_menu_button.h b/chrome/browser/chromeos/status/input_method_menu_button.h
index 3a232eb..325b63b 100644
--- a/chrome/browser/chromeos/status/input_method_menu_button.h
+++ b/chrome/browser/chromeos/status/input_method_menu_button.h
@@ -10,6 +10,7 @@
 
 #include "chrome/browser/chromeos/status/input_method_menu.h"
 #include "chrome/browser/chromeos/status/status_area_button.h"
+#include "views/controls/menu/view_menu_delegate.h"
 
 namespace chromeos {
 
@@ -18,7 +19,7 @@ class StatusAreaHost;
 // A class for the button in the status area which expands the dropdown menu for
 // switching input method and keyboard layout.
 class InputMethodMenuButton : public StatusAreaButton,
-                              public InputMethodMenu {
+                              public views::ViewMenuDelegate {
  public:
   explicit InputMethodMenuButton(StatusAreaHost* host);
   virtual ~InputMethodMenuButton() {}
@@ -27,7 +28,9 @@ class InputMethodMenuButton : public StatusAreaButton,
   virtual gfx::Size GetPreferredSize();
   virtual void OnLocaleChanged();
 
- private:
+  // views::ViewMenuDelegate implementation.
+  virtual void RunMenu(views::View* unused_source, const gfx::Point& pt);
+
   // InputMethodMenu implementation.
   virtual void UpdateUI(const std::string& input_method_id,
                         const std::wstring& name,
@@ -36,6 +39,8 @@ class InputMethodMenuButton : public StatusAreaButton,
   virtual bool ShouldSupportConfigUI();
   virtual void OpenConfigUI();
 
+ private:
+  scoped_ptr<InputMethodMenu> menu_;
   StatusAreaHost* host_;
 
   DISALLOW_COPY_AND_ASSIGN(InputMethodMenuButton);