Remove implementation of Panels on OSes other than ChromeOS.

chrome/browser/ui/panels/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_PANEL_COLLECTION_H_
-#define CHROME_BROWSER_UI_PANELS_PANEL_COLLECTION_H_
-
-#include "chrome/browser/ui/panels/panel_constants.h"
-#include "ui/gfx/geometry/point.h"
-#include "ui/gfx/geometry/rect.h"
-
-class Panel;
-
-// Common base class for a collection of panels. Subclasses manage
-// various layouts for displaying panels in the collection.
-class PanelCollection {
- public:
-  // Types of layout for the panel collections.
-  enum Type {
-    DETACHED,  // free-floating panels
-    DOCKED,    // panels are 'docked' along the window's edge
-    STACKED,   // panels are stacked together
-  };
-
-  // Masks that control how the panel is added and positioned.
-  enum PositioningMask {
-    // The panel is added and placed at default position that is decided by the
-    // collection.
-    DEFAULT_POSITION = 0x0,
-    // The panel is being added based on its current known position.
-    KNOWN_POSITION = 0x1,
-    // The panel is added and placed at top position (currently only used by
-    // stacked collection)
-    TOP_POSITION = 0x2,
-    // Do not update panel bounds. Only valid with DEFAULT_POSIITON.
-    DO_NOT_UPDATE_BOUNDS = 0x4,
-    // Wait for a brief delay before refreshing layout of the collection after
-    // adding panel to the collection. If not set, the collection will refresh
-    // its layout immediately.
-    DELAY_LAYOUT_REFRESH = 0x8,
-    // Do not refresh layout. Used by stacking.
-    NO_LAYOUT_REFRESH = 0x10,
-    // Collapse other inactive stacked panels such the tha new panel can fit
-    // within the working area. Used by stacking.
-    COLLAPSE_TO_FIT = 0x20
-  };
-
-  enum RemovalReason {
-    PANEL_CLOSED,
-    PANEL_CHANGED_COLLECTION
-  };
-
-  Type type() const { return type_; }
-
-  // Called when the display area is changed.
-  virtual void OnDisplayChanged() = 0;
-
-  // Updates the positioning of all panels in the collection, usually as
-  // a result of removing or resizing a panel in collection.
-  virtual void RefreshLayout() = 0;
-
-  // Adds |panel| to the collection of panels.
-  // |positioning_mask| indicates how |panel| should be added and positioned.
-  virtual void AddPanel(Panel* panel, PositioningMask positioning_mask) = 0;
-
-  // Removes |panel| from the collection of panels. Invoked asynchronously
-  // after a panel has been closed.
-  // |reason| denotes why the panel is removed from the collection.
-  virtual void RemovePanel(Panel* panel, RemovalReason reason) = 0;
-
-  // Closes all panels in the collection. Panels will be removed after closing.
-  virtual void CloseAll() = 0;
-
-  // Resizes the |panel| to the |preferred_window_size| and updates the layout
-  // of other panels in the collection accordingly.
-  // |preferred_window_size| is the outer dimensions of the window, not
-  // the content area, and is in screen coordinates.
-  // The preferred size may be adjusted to fit layout constraints.
-  virtual void ResizePanelWindow(Panel* panel,
-                                 const gfx::Size& preferred_window_size) = 0;
-
-  // Returns the sides from which |panel| can be resized by the user
-  // if |panel| is resizable in this collection.
-  virtual panel::Resizability GetPanelResizability(
-      const Panel* panel) const = 0;
-
-  // Change panel's bounds and take care of all possible side effects
-  // in ths collection as a result of the panel being resized by the user.
-  // TODO (AndreiB) Add a parameter telling what how to approach animation
-  // (no animation, continue existing, or start new).
-  virtual void OnPanelResizedByMouse(Panel* panel,
-                                     const gfx::Rect& new_bounds) = 0;
-
-  // Invoked when the draw attention state of the panel has changed.
-  // Subclass should update the display of the panel to match the new
-  // draw attention state.
-  virtual void OnPanelAttentionStateChanged(Panel* panel) = 0;
-
-  // Invoked when the titlebar of a |panel| in the collection has been clicked.
-  // Click behavior may be modified as indicated by |modifier|.
-  virtual void OnPanelTitlebarClicked(Panel* panel,
-                                      panel::ClickModifier modifier) = 0;
-
-  // Called when a panel's expansion state changes.
-  virtual void OnPanelExpansionStateChanged(Panel* panel) = 0;
-
-  // Called when a panel in the collection becomes active or inactive.
-  virtual void OnPanelActiveStateChanged(Panel* panel) = 0;
-
-  // Updates the display to show |panel| as active.
-  virtual void ActivatePanel(Panel* panel) = 0;
-
-  // Updates the display to show |panel| as minimized/restored.
-  virtual void MinimizePanel(Panel* panel) = 0;
-  virtual void RestorePanel(Panel* panel) = 0;
-
-  // Called when a panel's minimize/restore button is clicked.
-  // The behavior might be modified as indicated by |modifier|.
-  virtual void OnMinimizeButtonClicked(Panel* panel,
-                                       panel::ClickModifier modifier) = 0;
-  virtual void OnRestoreButtonClicked(Panel* panel,
-                                      panel::ClickModifier modifier) = 0;
-
-  // Returns true if minimize or restore button can be shown on the panel's
-  // titlebar.
-  virtual bool CanShowMinimizeButton(const Panel* panel) const = 0;
-  virtual bool CanShowRestoreButton(const Panel* panel) const = 0;
-
-  virtual bool IsPanelMinimized(const Panel* panel) const = 0;
-
-  virtual bool UsesAlwaysOnTopPanels() const = 0;
-
-  // Saves/restores/discards the placement information of |panel|. This is
-  // useful in bringing back the dragging panel to its original positioning
-  // when the drag is cancelled. After the placement information is saved,
-  // the caller should only call one of RestorePanelToSavedPlacement or
-  // DiscardSavedPanelPlacement.
-  virtual void SavePanelPlacement(Panel* panel) = 0;
-  virtual void RestorePanelToSavedPlacement() = 0;
-  virtual void DiscardSavedPanelPlacement() = 0;
-
-  // When a panel is added to this collection, some modifications to its visual
-  // style or underlying implementation may be in order. Each collection decides
-  // what properties should be applied to a newly-added panel.
-  virtual void UpdatePanelOnCollectionChange(Panel* panel) = 0;
-
-  // Returns the initial bounds to show the panel based on the requested bounds.
-  virtual gfx::Rect GetInitialPanelBounds(
-      const gfx::Rect& requested_bounds) const = 0;
-
- protected:
-  explicit PanelCollection(Type type);
-  virtual ~PanelCollection();
-
-  const Type type_;  // Type of this panel collection.
-};
-
-#endif  // CHROME_BROWSER_UI_PANELS_PANEL_COLLECTION_H_