Remove implementation of Panels on OSes other than ChromeOS.

chrome/browser/ui/panels/stacked_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_STACKED_PANEL_COLLECTION_H_
-#define CHROME_BROWSER_UI_PANELS_STACKED_PANEL_COLLECTION_H_
-
-#include <list>
-#include <vector>
-
-#include "base/macros.h"
-#include "chrome/browser/ui/panels/native_panel_stack_window.h"
-#include "chrome/browser/ui/panels/panel_collection.h"
-#include "chrome/browser/ui/panels/panel_constants.h"
-#include "ui/gfx/geometry/rect.h"
-
-class PanelManager;
-namespace gfx {
-class Vector2d;
-}
-
-class StackedPanelCollection : public PanelCollection,
-                               public NativePanelStackWindowDelegate {
- public:
-  typedef std::list<Panel*> Panels;
-
-  explicit StackedPanelCollection(PanelManager* panel_manager);
-  ~StackedPanelCollection() override;
-
-  // PanelCollection OVERRIDES:
-  void OnDisplayChanged() override;
-  void RefreshLayout() override;
-  void AddPanel(Panel* panel, PositioningMask positioning_mask) override;
-  void RemovePanel(Panel* panel, RemovalReason reason) 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;
-
-  Panel* GetPanelAbove(Panel* panel) const;
-  Panel* GetPanelBelow(Panel* panel) const;
-  bool HasPanel(Panel* panel) const;
-
-  void MoveAllDraggingPanelsInstantly(const gfx::Vector2d& delta_origin);
-
-  bool IsMinimized() const;
-  bool IsAnimatingPanelBounds(Panel* panel) const;
-
-  // Returns the maximum available space from the bottom of the stack. The
-  // maximum available space is defined as the distance between the bottom
-  // of the stack and the bottom of the working area, assuming that all inactive
-  // panels are collapsed.
-  int GetMaximiumAvailableBottomSpace() const;
-
-  int num_panels() const { return panels_.size(); }
-  const Panels& panels() const { return panels_; }
-  Panel* top_panel() const { return panels_.empty() ? NULL : panels_.front(); }
-  Panel* bottom_panel() const {
-    return panels_.empty() ? NULL : panels_.back();
-  }
-  Panel* most_recently_active_panel() const {
-    return most_recently_active_panels_.empty() ?
-        NULL : most_recently_active_panels_.front();
-  }
-
- private:
-  struct PanelPlacement {
-    Panel* panel;
-    gfx::Point position;
-    // Used to remember the top panel, if different from |panel|, for use when
-    // restoring it. When there're only 2 panels in the stack and the bottom
-    // panel is being dragged out of the stack, both panels will be moved to
-    // the detached collection. We need to track the top panel in order to
-    // put it back to the same stack of the dragging panel.
-    Panel* top_panel;
-
-    PanelPlacement() : panel(NULL), top_panel(NULL) { }
-  };
-
-  // Overridden from PanelBoundsBatchUpdateObserver:
-  base::string16 GetTitle() const override;
-  gfx::Image GetIcon() const override;
-  void PanelBoundsBatchUpdateCompleted() override;
-
-  // Returns the enclosing bounds that include all panels in the stack.
-  gfx::Rect GetEnclosingBounds() const;
-
-  // Returns the work area where the stack resides. If the stack spans across
-  // multiple displays, return the work area of the display that most closely
-  // intersects the stack.
-  gfx::Rect GetWorkArea() const;
-
-  // Refresh all panel layouts, with top panel poisitoned at |start_position|.
-  // All panels should have same width as |common_width|.
-  void RefreshLayoutWithTopPanelStartingAt(const gfx::Point& start_position,
-                                           int common_width);
-
-  // Tries to collapse panels in the least recently active order in order to get
-  // enough bottom space for |needed_space|. Returns the current available space
-  // so far if all panels that could be collapsed have been collapsed.
-  int MinimizePanelsForSpace(int needed_space);
-
-  // Returns the current available space above the top of the stack. The current
-  // available space is defined as the distance between the top of the working
-  // area and the top of the stack.
-  int GetCurrentAvailableTopSpace() const;
-
-  // Returns the current available space below the bottom of the stack. The
-  // current available space is defined as the distance between the bottom
-  // of the stack and the bottom of the working area.
-  int GetCurrentAvailableBottomSpace() const;
-
-  // Minimizes or restores all panels in the collection.
-  void MinimizeAll();
-  void RestoreAll(Panel* panel_clicked);
-
-  void UpdatePanelCornerStyle(Panel* panel);
-
-  NativePanelStackWindow* GetStackWindowForPanel(Panel* panel) const;
-
-  PanelManager* panel_manager_;
-
-  // Both stack window pointers are weak pointers and self owned. Once a stack
-  // window is created, it will only be destructed by calling Close when it is
-  // not longer needed as in RemovePanel and CloseAll.
-
-  // The main background window that encloses all panels in the stack when
-  // stacking is not occuring, or existing panels otherwise.
-  // This window provides:
-  // 1) the shadow around the the outer area of all panels.
-  // 2) the consolidated taskbar icon and the consolidated preview
-  //    (Windows only)
-  NativePanelStackWindow* primary_stack_window_;
-
-  // The additional background window that encloses those panels that are
-  // being added to the stack when the stacking is occuring. Since those panels
-  // have not been fully aligned with existing panels in the stack before the
-  // stacking ends, we put those panels in a separate background window that
-  // only provides the shadow around the outer area of those panels.
-  NativePanelStackWindow* secondary_stack_window_;
-
-  Panels panels_;  // The top panel is in the front of the list.
-
-  // Keeps track of the panels in their active order. The most recently active
-  // panel is in the front of the list.
-  Panels most_recently_active_panels_;
-
-  // Used to save the placement information for a panel.
-  PanelPlacement saved_panel_placement_;
-
-  bool minimizing_all_;  // True while minimizing all panels.
-
-  DISALLOW_COPY_AND_ASSIGN(StackedPanelCollection);
-};
-
-#endif  // CHROME_BROWSER_UI_PANELS_STACKED_PANEL_COLLECTION_H_