chromeos: Move files in //ash/common to //ash

ash/common/system/tray/size_range_layout.h

-// Copyright 2016 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 ASH_COMMON_SYSTEM_TRAY_SIZE_RANGE_LAYOUT_H_
-#define ASH_COMMON_SYSTEM_TRAY_SIZE_RANGE_LAYOUT_H_
-
-#include <memory>
-
-#include "ash/ash_export.h"
-#include "base/macros.h"
-#include "ui/gfx/geometry/size.h"
-#include "ui/views/layout/layout_manager.h"
-
-namespace views {
-class View;
-}  // namespace views
-
-namespace ash {
-
-// A LayoutManager adapter that allows clients to specify a minimum and/or a
-// maximum preferred size. The actual layout will be delegated to the
-// LayoutManager owned by this. i.e. |this| can be used to override the
-// preferred size returned by a View.
-//
-// By default the SizeRangeLayout is configured to own a FillLayout but this can
-// be overridden with SetLayoutManager().
-//
-// Example use case :
-//
-//  Suppose you wanted a Label to take up a specific size of (50, 50) even
-//  though the label's preferred size was (25, 25).
-//
-// Example code:
-//
-//  Label* label = new Label(kSomeDummyText);
-//  View* container = new View();
-//  container->AddChildView(label);
-//  SizeRangeLayout* layout = new SizeRangeLayout();
-//  layout->SetSize(gfx::Size(50, 50));
-//  container->SetLayoutManager(layout);
-//
-class ASH_EXPORT SizeRangeLayout : public views::LayoutManager {
- public:
-  // Create a layout with no minimum or maximum preferred size.
-  SizeRangeLayout();
-
-  // Create a layout with the given minimum and maximum preferred sizes. If
-  // |max_size| is smaller than |min_size| then |min_size| will be set to the
-  // smaller |max_size| value.
-  SizeRangeLayout(const gfx::Size& min_size, const gfx::Size& max_size);
-
-  ~SizeRangeLayout() override;
-
-  // The absolute minimum possible width/height. Use this with SetMinSize() to
-  // effectively unset the minimum preferred size.
-  static const int kAbsoluteMinSize;
-
-  // Tthe absolute maximum possible width/height. Use this with SetMaxSize() to
-  // effectively unset the maximum preferred size.
-  static const int kAbsoluteMaxSize;
-
-  // Sets both the minimum and maximum preferred size.
-  void SetSize(const gfx::Size& size);
-  void SetSize(int width, int height);
-
-  // Set the minimum preferred size that GetPreferredSize() will round up to. If
-  // |size| is larger than the current |max_size_| then |max_size_| will set to
-  // |size| as well.
-  void SetMinSize(const gfx::Size& size);
-  void SetMinSize(int width, int height);
-
-  gfx::Size min_size() const { return min_size_; }
-
-  // Set the minimum preferred size that GetPreferredSize() will round down to.
-  // If |size| is smaller than the current |min_size_| then |min_size_| will set
-  // to |size| as well.
-  void SetMaxSize(const gfx::Size& size);
-
-  // Sets the layout manager that actually performs the layout once the bounds
-  // have been defined.
-  void SetLayoutManager(std::unique_ptr<LayoutManager> layout_manager);
-
-  // LayoutManager:
-  void Installed(views::View* host) override;
-  void Layout(views::View* host) override;
-  gfx::Size GetPreferredSize(const views::View* host) const override;
-  int GetPreferredHeightForWidth(const views::View* host,
-                                 int width) const override;
-  void ViewAdded(views::View* host, views::View* view) override;
-  void ViewRemoved(views::View* host, views::View* view) override;
-
- private:
-  friend class SizeRangeLayoutTest;
-
-  // Clamps |size| to be within the minimum and maximum preferred sizes.
-  void ClampSizeToRange(gfx::Size* size) const;
-
-  // The host View that this has been installed on.
-  views::View* host_ = nullptr;
-
-  // The layout manager that actually performs the layout.
-  std::unique_ptr<views::LayoutManager> layout_manager_;
-
-  // The minimum preferred size.
-  gfx::Size min_size_;
-
-  // The maximum preferred size.
-  gfx::Size max_size_;
-
-  DISALLOW_COPY_AND_ASSIGN(SizeRangeLayout);
-};
-
-}  // namespace ash
-
-#endif  // ASH_COMMON_SYSTEM_TRAY_SIZE_RANGE_LAYOUT_H_