Moves common code in ash/wm/overview to ash/common/wm/overview

ash/wm/overview/window_selector_controller.cc

-// Copyright 2013 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 "ash/wm/overview/window_selector_controller.h"
-
-#include <vector>
-
-#include "ash/common/session/session_state_delegate.h"
-#include "ash/common/system/tray/system_tray_delegate.h"
-#include "ash/common/wm/mru_window_tracker.h"
-#include "ash/common/wm/window_state.h"
-#include "ash/common/wm_shell.h"
-#include "ash/common/wm_window.h"
-#include "ash/wm/overview/window_selector.h"
-#include "base/metrics/histogram.h"
-
-namespace ash {
-
-WindowSelectorController::WindowSelectorController() {
-}
-
-WindowSelectorController::~WindowSelectorController() {
-}
-
-// static
-bool WindowSelectorController::CanSelect() {
-  // Don't allow a window overview if the screen is locked or a modal dialog is
-  // open or running in kiosk app session.
-  SessionStateDelegate* session_state_delegate =
-      WmShell::Get()->GetSessionStateDelegate();
-  return session_state_delegate->IsActiveUserSessionStarted() &&
-         !session_state_delegate->IsScreenLocked() &&
-         !WmShell::Get()->IsSystemModalWindowOpen() &&
-         !WmShell::Get()->IsPinned() &&
-         WmShell::Get()->system_tray_delegate()->GetUserLoginStatus() !=
-             LoginStatus::KIOSK_APP;
-}
-
-void WindowSelectorController::ToggleOverview() {
-  if (IsSelecting()) {
-    OnSelectionEnded();
-  } else {
-    // Don't start overview if window selection is not allowed.
-    if (!CanSelect())
-      return;
-
-    std::vector<WmWindow*> windows =
-        WmShell::Get()->GetMruWindowTracker()->BuildMruWindowList();
-    auto end =
-        std::remove_if(windows.begin(), windows.end(),
-                       std::not1(std::ptr_fun(&WindowSelector::IsSelectable)));
-    windows.resize(end - windows.begin());
-
-    // Don't enter overview mode with no windows.
-    if (windows.empty())
-      return;
-
-    WmShell::Get()->OnOverviewModeStarting();
-    window_selector_.reset(new WindowSelector(this));
-    window_selector_->Init(windows);
-    OnSelectionStarted();
-  }
-}
-
-bool WindowSelectorController::IsSelecting() {
-  return window_selector_.get() != NULL;
-}
-
-bool WindowSelectorController::IsRestoringMinimizedWindows() const {
-  return window_selector_.get() != NULL &&
-         window_selector_->restoring_minimized_windows();
-}
-
-// TODO(flackr): Make WindowSelectorController observe the activation of
-// windows, so we can remove WindowSelectorDelegate.
-void WindowSelectorController::OnSelectionEnded() {
-  window_selector_->Shutdown();
-  window_selector_.reset();
-  last_selection_time_ = base::Time::Now();
-  WmShell::Get()->OnOverviewModeEnded();
-}
-
-void WindowSelectorController::OnSelectionStarted() {
-  if (!last_selection_time_.is_null()) {
-    UMA_HISTOGRAM_LONG_TIMES(
-        "Ash.WindowSelector.TimeBetweenUse",
-        base::Time::Now() - last_selection_time_);
-  }
-}
-
-}  // namespace ash