Remove implementation of Panels on OSes other than ChromeOS.

chrome/browser/ui/panels/docked_panel_collection.h

-// 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.
-
-#ifndef CHROME_BROWSER_UI_PANELS_DOCKED_PANEL_COLLECTION_H_
-#define CHROME_BROWSER_UI_PANELS_DOCKED_PANEL_COLLECTION_H_
-
-#include <list>
-#include <set>
-
-#include "base/macros.h"
-#include "base/memory/weak_ptr.h"
-#include "chrome/browser/ui/panels/display_settings_provider.h"
-#include "chrome/browser/ui/panels/panel.h"
-#include "chrome/browser/ui/panels/panel_collection.h"
-#include "chrome/browser/ui/panels/panel_mouse_watcher_observer.h"
-#include "ui/gfx/geometry/rect.h"
-
-class PanelManager;
-
-// This class manages a group of panels that could be docked to the bottom of
-// screen.
-class DockedPanelCollection :
-    public PanelCollection,
-    public PanelMouseWatcherObserver,
-    public DisplaySettingsProvider::DesktopBarObserver {
- public:
-  typedef std::list<Panel*> Panels;
-
-  explicit DockedPanelCollection(PanelManager* panel_manager);
-  ~DockedPanelCollection() override;
-
-  // PanelCollection OVERRIDES:
-  void OnDisplayChanged() override;
-
-  // Rearranges the positions of the panels in the collection
-  // and reduces their width when there is not enough room.
-  // This is called when the display space has been changed, i.e. working
-  // area being changed or a panel being closed.
-  void RefreshLayout() override;
-
-  // Adds a panel to the collection. The panel may be a newly created panel or
-  // one that is transitioning from another grouping of panels.
-  void AddPanel(Panel* panel, PositioningMask positioning_mask) override;
-  void RemovePanel(Panel* pane, RemovalReason reasonl) override;
-  void CloseAll() override;
-  void ResizePanelWindow(Panel* panel,
-                         const gfx::Size& preferred_window_size) override;
-  panel::Resizability GetPanelResizability(const Panel* panel) const override;
-  void OnPanelResizedByMouse(Panel* panel,
-                             const gfx::Rect& new_bounds) override;
-  void OnPanelAttentionStateChanged(Panel* panel) override;
-  void OnPanelTitlebarClicked(Panel* panel,
-                              panel::ClickModifier modifier) override;
-  void ActivatePanel(Panel* panel) override;
-  void MinimizePanel(Panel* panel) override;
-  void RestorePanel(Panel* panel) override;
-  void OnMinimizeButtonClicked(Panel* panel,
-                               panel::ClickModifier modifier) override;
-  void OnRestoreButtonClicked(Panel* panel,
-                              panel::ClickModifier modifier) override;
-  bool CanShowMinimizeButton(const Panel* panel) const override;
-  bool CanShowRestoreButton(const Panel* panel) const override;
-  bool IsPanelMinimized(const Panel* panel) const override;
-  bool UsesAlwaysOnTopPanels() const override;
-  void SavePanelPlacement(Panel* panel) override;
-  void RestorePanelToSavedPlacement() override;
-  void DiscardSavedPanelPlacement() override;
-  void UpdatePanelOnCollectionChange(Panel* panel) override;
-  void OnPanelExpansionStateChanged(Panel* panel) override;
-  void OnPanelActiveStateChanged(Panel* panel) override;
-  gfx::Rect GetInitialPanelBounds(
-      const gfx::Rect& requested_bounds) const override;
-
-  // Returns true if we should bring up the titlebars, given the current mouse
-  // point.
-  bool ShouldBringUpTitlebars(int mouse_x, int mouse_y) const;
-
-  // Brings up or down the titlebars for all minimized panels.
-  void BringUpOrDownTitlebars(bool bring_up);
-
-  // Returns the bottom position for the panel per its expansion state. If auto-
-  // hide bottom bar is present, we want to move the minimized panel to the
-  // bottom of the screen, not the bottom of the work area.
-  int GetBottomPositionForExpansionState(
-      Panel::ExpansionState expansion_state) const;
-
-  // Returns panel width to be used, taking into account possible "squeezing"
-  // due to lack of space in the collection.
-  int WidthToDisplayPanelInCollection(bool is_for_active_panel,
-                                      double squeeze_factor,
-                                      int full_width) const;
-
-  bool HasPanel(Panel* panel) const;
-
-  // num_panels() and panels() only includes panels in the collection that
-  // do NOT have a temporary layout.
-  int num_panels() const { return panels_.size(); }
-  const Panels& panels() const { return panels_; }
-  Panel* last_panel() const { return panels_.empty() ? NULL : panels_.back(); }
-
-  gfx::Rect work_area() const { return work_area_; }
-
-  int StartingRightPosition() const;
-
-#ifdef UNIT_TEST
-  int minimized_panel_count() const {return minimized_panel_count_; }
-#endif
-
- private:
-  friend class DockedPanelDragHandler;
-
-  enum TitlebarAction {
-    NO_ACTION,
-    BRING_UP,
-    BRING_DOWN
-  };
-
-  struct PanelPlacement {
-    Panel* panel;
-    // Used to remember the panel to the left of |panel|, if any, for use when
-    // restoring the position of |panel|.
-    Panel* left_panel;
-
-    PanelPlacement() : panel(NULL), left_panel(NULL) { }
-  };
-
-  // Overridden from PanelMouseWatcherObserver:
-  void OnMouseMove(const gfx::Point& mouse_position) override;
-
-  // Overridden from DisplaySettingsProvider::DesktopBarObserver:
-  void OnAutoHidingDesktopBarVisibilityChanged(
-      DisplaySettingsProvider::DesktopBarAlignment alignment,
-      DisplaySettingsProvider::DesktopBarVisibility visibility) override;
-  void OnAutoHidingDesktopBarThicknessChanged(
-      DisplaySettingsProvider::DesktopBarAlignment alignment,
-      int thickness) override;
-
-  // Schedules a layout refresh with a short delay to avoid too much flicker.
-  void ScheduleLayoutRefresh();
-
-  // Keep track of the minimized panels to control mouse watching.
-  void UpdateMinimizedPanelCount();
-
-  // Minimizes or restores all panels in the collection.
-  void MinimizeAll();
-  void RestoreAll();
-
-  // Makes sure the panel's bounds reflect its expansion state and the
-  // panel is aligned at the bottom of the screen. Does not touch the x
-  // coordinate.
-  void AdjustPanelBoundsPerExpansionState(Panel* panel,
-      gfx::Rect* panel_bounds);
-
-  // Does the real job of bringing up or down the titlebars.
-  void DoBringUpOrDownTitlebars(bool bring_up);
-  // The callback for a delyed task, checks if it still need to perform
-  // the delayed action.
-  void DelayedBringUpOrDownTitlebarsCheck();
-
-  // Compute default bounds for a panel of |full_size| that would be used
-  // when adding the panel to the collection.
-  gfx::Point GetDefaultPositionForPanel(const gfx::Size& full_size) const;
-
-  int GetRightMostAvailablePosition() const;
-
-  PanelManager* panel_manager_;  // Weak, owns us.
-
-  // All panels in the collection must fit within this area.
-  gfx::Rect work_area_;
-
-  Panels panels_;
-
-  int minimized_panel_count_;
-  bool are_titlebars_up_;
-
-  bool minimizing_all_;  // True while minimizing all panels.
-
-  // Delayed transitions support. Sometimes transitions between minimized and
-  // title-only states are delayed, for better usability with Taskbars/Docks.
-  TitlebarAction delayed_titlebar_action_;
-
-  // Used to save the placement information for a panel.
-  PanelPlacement saved_panel_placement_;
-
-  static const int kPanelsHorizontalSpacing = 4;
-
-  // Owned by MessageLoop after posting.
-  base::WeakPtrFactory<DockedPanelCollection> titlebar_action_factory_;
-
-  // Owned by MessageLoop after posting.
-  base::WeakPtrFactory<DockedPanelCollection> refresh_action_factory_;
-
-  DISALLOW_COPY_AND_ASSIGN(DockedPanelCollection);
-};
-
-#endif  // CHROME_BROWSER_UI_PANELS_DOCKED_PANEL_COLLECTION_H_