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// Copyright (c) 2011 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 "chrome/browser/chromeos/status/input_method_menu_button.h"
#include <string>
#include "base/utf_string_conversions.h"
#include "chrome/browser/chromeos/cros/cros_library.h"
#include "chrome/browser/chromeos/input_method/input_method_util.h"
#include "chrome/browser/chromeos/status/status_area_host.h"
#include "chrome/browser/prefs/pref_service.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/ui/browser.h"
#include "chrome/browser/ui/browser_list.h"
#include "chrome/browser/ui/browser_window.h"
#include "views/window/window.h"
namespace {
// Returns PrefService object associated with |host|. Returns NULL if we are NOT
// within a browser.
PrefService* GetPrefService(chromeos::StatusAreaHost* host) {
if (host->GetProfile()) {
return host->GetProfile()->GetPrefs();
}
return NULL;
}
// 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 {
////////////////////////////////////////////////////////////////////////////////
// InputMethodMenuButton
InputMethodMenuButton::InputMethodMenuButton(StatusAreaHost* host)
: StatusAreaButton(host, this),
menu_(new MenuImpl(this, GetPrefService(host), host->GetScreenMode())) {
UpdateUIFromCurrentInputMethod();
}
InputMethodMenuButton::~InputMethodMenuButton() {}
////////////////////////////////////////////////////////////////////////////////
// views::View implementation:
gfx::Size InputMethodMenuButton::GetPreferredSize() {
// If not enabled, then hide this button.
if (!IsEnabled()) {
return gfx::Size(0, 0);
}
return StatusAreaButton::GetPreferredSize();
}
void InputMethodMenuButton::OnLocaleChanged() {
input_method::OnLocaleChanged();
UpdateUIFromCurrentInputMethod();
Layout();
SchedulePaint();
}
////////////////////////////////////////////////////////////////////////////////
// views::ViewMenuDelegate implementation:
void InputMethodMenuButton::RunMenu(views::View* unused_source,
const gfx::Point& pt) {
menu_->RunMenu(unused_source, pt);
}
bool InputMethodMenuButton::WindowIsActive() {
Browser* active_browser = BrowserList::GetLastActive();
if (!active_browser) {
// Can't get an active browser. Just return true, which is safer.
return true;
}
BrowserWindow* active_window = active_browser->window();
const views::Window* current_window = GetWindow();
if (!active_window || !current_window) {
// Can't get an active or current window. Just return true as well.
return true;
}
return active_window->GetNativeHandle() == current_window->GetNativeWindow();
}
void InputMethodMenuButton::UpdateUI(const std::string& input_method_id,
const std::wstring& name,
const std::wstring& tooltip,
size_t num_active_input_methods) {
// Hide the button only if there is only one input method, and the input
// method is a XKB keyboard layout. We don't hide the button for other
// types of input methods as these might have intra input method modes,
// like Hiragana and Katakana modes in Japanese input methods.
if (num_active_input_methods == 1 &&
input_method::IsKeyboardLayout(input_method_id) &&
host_->GetScreenMode() == StatusAreaHost::kBrowserMode) {
// As the disabled color is set to invisible, disabling makes the
// button disappear.
SetEnabled(false);
SetTooltipText(L""); // remove tooltip
} else {
SetEnabled(true);
SetTooltipText(tooltip);
}
SetText(name);
if (WindowIsActive()) {
// We don't call these functions if the |current_window| is not active since
// the calls are relatively expensive (crosbug.com/9206). Please note that
// PrepareMenu() is necessary for fixing crosbug.com/7522 when the window
// is active.
menu_->PrepareMenu();
SchedulePaint();
}
// TODO(yusukes): For a window which isn't on top, probably it's better to
// update the texts when the window gets activated because SetTooltipText()
// and SetText() are also expensive.
}
void InputMethodMenuButton::OpenConfigUI() {
host_->OpenButtonOptions(this); // ask browser to open the WebUI page.
}
bool InputMethodMenuButton::ShouldSupportConfigUI() {
return host_->ShouldOpenButtonOptions(this);
}
void InputMethodMenuButton::UpdateUIFromCurrentInputMethod() {
chromeos::InputMethodLibrary* input_method_library =
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);
const size_t num_active_input_methods =
input_method_library->GetNumActiveInputMethods();
UpdateUI(input_method.id, name, tooltip, num_active_input_methods);
}
} // namespace chromeos
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