Remove balloon notification code. The last user was the Linux GTK port but that's deleted now.

chrome/browser/notifications/balloon_collection_impl.h

Index: chrome/browser/notifications/balloon_collection_impl.h
===================================================================
--- chrome/browser/notifications/balloon_collection_impl.h	(revision 263011)
+++ chrome/browser/notifications/balloon_collection_impl.h	(working copy)
@@ -1,223 +0,0 @@
-// 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.
-
-// Handles the visible notification (or balloons).
-
-#ifndef CHROME_BROWSER_NOTIFICATIONS_BALLOON_COLLECTION_IMPL_H_
-#define CHROME_BROWSER_NOTIFICATIONS_BALLOON_COLLECTION_IMPL_H_
-
-#include <deque>
-
-#include "base/basictypes.h"
-#include "base/compiler_specific.h"
-#include "base/memory/weak_ptr.h"
-#include "base/message_loop/message_loop.h"
-#include "chrome/browser/notifications/balloon_collection.h"
-#include "chrome/browser/notifications/balloon_collection_base.h"
-#include "content/public/browser/notification_observer.h"
-#include "content/public/browser/notification_registrar.h"
-#include "ui/gfx/point.h"
-#include "ui/gfx/rect.h"
-
-// A balloon collection represents a set of notification balloons being
-// shown on the screen.  It positions new notifications according to
-// a layout, and monitors for balloons being closed, which it reports
-// up to its parent, the notification UI manager.
-class BalloonCollectionImpl : public BalloonCollection,
-                              public content::NotificationObserver,
-                              public base::MessageLoopForUI::Observer {
- public:
-  BalloonCollectionImpl();
-  virtual ~BalloonCollectionImpl();
-
-  // BalloonCollection interface.
-  virtual void Add(const Notification& notification,
-                   Profile* profile) OVERRIDE;
-  virtual const Notification* FindById(const std::string& id) const OVERRIDE;
-  virtual bool RemoveById(const std::string& id) OVERRIDE;
-  virtual bool RemoveBySourceOrigin(const GURL& source_origin) OVERRIDE;
-  virtual bool RemoveByProfile(Profile* profile) OVERRIDE;
-  virtual void RemoveAll() OVERRIDE;
-  virtual bool HasSpace() const OVERRIDE;
-  virtual void ResizeBalloon(Balloon* balloon, const gfx::Size& size) OVERRIDE;
-  virtual void SetPositionPreference(PositionPreference position) OVERRIDE;
-  virtual void DisplayChanged() OVERRIDE;
-  virtual void OnBalloonClosed(Balloon* source) OVERRIDE;
-  virtual const Balloons& GetActiveBalloons() OVERRIDE;
-
-  // content::NotificationObserver interface.
-  virtual void Observe(int type,
-                       const content::NotificationSource& source,
-                       const content::NotificationDetails& details) OVERRIDE;
-
-  // MessageLoopForUI::Observer interface.
-  virtual void WillProcessEvent(GdkEvent* event) OVERRIDE;
-  virtual void DidProcessEvent(GdkEvent* event) OVERRIDE;
-
-  // base_ is embedded, so this is a simple accessor for the number of
-  // balloons in the collection.
-  int count() const { return base_.count(); }
-
-  static int min_balloon_width() { return Layout::min_balloon_width(); }
-  static int max_balloon_width() { return Layout::max_balloon_width(); }
-  static int min_balloon_height() { return Layout::min_balloon_height(); }
-  static int max_balloon_height() { return Layout::max_balloon_height(); }
-
- protected:
-  // Calculates layout values for the balloons including
-  // the scaling, the max/min sizes, and the upper left corner of each.
-  class Layout {
-   public:
-    Layout();
-
-    // These enumerations all are based on a screen orientation where
-    // the origin is the top-left.
-    enum Placement {
-      INVALID,
-      VERTICALLY_FROM_TOP_LEFT,
-      VERTICALLY_FROM_TOP_RIGHT,
-      VERTICALLY_FROM_BOTTOM_LEFT,
-      VERTICALLY_FROM_BOTTOM_RIGHT
-    };
-
-    // Refresh the work area and balloon placement.
-    void OnDisplaySettingsChanged();
-
-    // TODO(johnnyg): Scale the size to account for the system font factor.
-    static int min_balloon_width() { return kBalloonMinWidth; }
-    static int max_balloon_width() { return kBalloonMaxWidth; }
-    static int min_balloon_height() { return kBalloonMinHeight; }
-    static int max_balloon_height() { return kBalloonMaxHeight; }
-
-    // Utility function constrains the input rectangle to the min and max sizes.
-    static gfx::Size ConstrainToSizeLimits(const gfx::Size& rect);
-
-    void set_placement(Placement placement) { placement_ = placement; }
-
-    // Returns both the total space available and the maximum
-    // allowed per balloon.
-    //
-    // The size may be a height or length depending on the way that
-    // balloons are laid out.
-    void GetMaxLinearSize(int* max_balloon_size, int* total_size) const;
-
-    // Refresh the cached values for work area and drawing metrics.
-    // The application should call this method to re-acquire metrics after
-    // any resolution or settings change.
-    // Returns true if and only if a metric changed.
-    bool RefreshSystemMetrics();
-
-    // Returns the origin for the sequence of balloons depending on layout.
-    // Should not be used to place a balloon -- only to call NextPosition().
-    gfx::Point GetLayoutOrigin() const;
-
-    // Compute the position for the next balloon.
-    // Start with *position_iterator = GetLayoutOrigin() and call repeatedly
-    // to get a sequence of positions. Return value is the upper-left coordinate
-    // for each next balloon.
-    gfx::Point NextPosition(const gfx::Size& balloon_size,
-                            gfx::Point* position_iterator) const;
-
-    // Return a offscreen location which is offscreen for this layout,
-    // to be used as the initial position for an animation into view.
-    gfx::Point OffScreenLocation() const;
-
-    // Returns true if the layout requires offsetting for keeping the close
-    // buttons under the cursor during rapid-close interaction.
-    bool RequiresOffsets() const;
-
-    // Returns true if there is change to the offset that requires the balloons
-    // to be repositioned.
-    bool ComputeOffsetToMoveAbovePanels();
-
-    void enable_computing_panel_offset() {
-      need_to_compute_panel_offset_ = true;
-    }
-
-   private:
-    // Layout parameters
-    int VerticalEdgeMargin() const;
-    int HorizontalEdgeMargin() const;
-    int InterBalloonMargin() const;
-
-    bool NeedToMoveAboveLeftSidePanels() const;
-    bool NeedToMoveAboveRightSidePanels() const;
-
-    // Minimum and maximum size of balloon content.
-    static const int kBalloonMinWidth = 300;
-    static const int kBalloonMaxWidth = 300;
-    static const int kBalloonMinHeight = 24;
-    static const int kBalloonMaxHeight = 160;
-
-    Placement placement_;
-    gfx::Rect work_area_;
-
-    // The flag that indicates that the panel offset computation should be
-    // performed.
-    bool need_to_compute_panel_offset_;
-
-    // The offset that guarantees that the notificaitions shown in the
-    // lower-right or lower-left corner of the screen will go above currently
-    // shown panels and will not be obscured by them.
-    int offset_to_move_above_panels_;
-
-    DISALLOW_COPY_AND_ASSIGN(Layout);
-  };
-
-  // Creates a new balloon. Overridable by derived classes and unit tests.
-  // The caller is responsible for freeing the pointer returned.
-  virtual Balloon* MakeBalloon(const Notification& notification,
-                               Profile* profile);
-
-  // Protected implementation of Add with additional add_to_front parameter
-  // for use by derived classes.
-  void AddImpl(const Notification& notification,
-               Profile* profile,
-               bool add_to_front);
-
-  // Gets a bounding box for all the current balloons in screen coordinates.
-  gfx::Rect GetBalloonsBoundingBox() const;
-
-  BalloonCollectionBase& base() { return base_; }
-  Layout& layout() { return layout_; }
-
- private:
-  // Adjusts the positions of the balloons (e.g., when one is closed).
-  // Implemented by each platform for specific UI requirements.
-  void PositionBalloons(bool is_reposition);
-
-  // Cross-platform internal implementation for PositionBalloons.
-  void PositionBalloonsInternal(bool is_reposition);
-
-  // Base implementation for the collection of active balloons.
-  BalloonCollectionBase base_;
-
-  // The layout parameters for balloons in this collection.
-  Layout layout_;
-
-  content::NotificationRegistrar registrar_;
-
-  // Start and stop observing all UI events.
-  void AddMessageLoopObserver();
-  void RemoveMessageLoopObserver();
-
-  // Cancel all offset and reposition the balloons normally.
-  void CancelOffsets();
-
-  // Handles a mouse motion while the balloons are temporarily offset.
-  void HandleMouseMoveEvent();
-
-  // Is the current cursor in the balloon area?
-  bool IsCursorInBalloonCollection() const;
-
-  // Factory for generating delayed reposition tasks on mouse motion.
-  base::WeakPtrFactory<BalloonCollectionImpl> reposition_factory_;
-
-  // Is the balloon collection currently listening for UI events?
-  bool added_as_message_loop_observer_;
-
-  DISALLOW_COPY_AND_ASSIGN(BalloonCollectionImpl);
-};
-
-#endif  // CHROME_BROWSER_NOTIFICATIONS_BALLOON_COLLECTION_IMPL_H_