apps/size_constraints.h

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef APPS_SIZE_CONSTRAINTS_H_
   6 #define APPS_SIZE_CONSTRAINTS_H_
   7
   8 #include "ui/gfx/geometry/size.h"
   9
  10 namespace gfx {
  11 class Insets;
  12 }
  13
  14 namespace apps {
  15
  16 class SizeConstraints {
  17  public:
  18   // The value SizeConstraints uses to represent an unbounded width or height.
  19   // This is an enum so that it can be declared inline here.
  20   enum { kUnboundedSize = 0 };
  21
  22   SizeConstraints();
  23   SizeConstraints(const gfx::Size& min_size, const gfx::Size& max_size);
  24   ~SizeConstraints();
  25
  26   // Adds frame insets to a size constraint.
  27   static gfx::Size AddFrameToConstraints(const gfx::Size& size_constraints,
  28                                          const gfx::Insets& frame_insets);
  29
  30   // Returns the bounds with its size clamped to the min/max size.
  31   gfx::Size ClampSize(gfx::Size size) const;
  32
  33   // When gfx::Size is used as a min/max size, a zero represents an unbounded
  34   // component. This method checks whether either component is specified.
  35   // Note we can't use gfx::Size::IsEmpty as it returns true if either width
  36   // or height is zero.
  37   bool HasMinimumSize() const;
  38   bool HasMaximumSize() const;
  39
  40   // This returns true if all components are specified, and min and max are
  41   // equal.
  42   bool HasFixedSize() const;
  43
  44   gfx::Size GetMaximumSize() const;
  45   gfx::Size GetMinimumSize() const;
  46
  47   void set_minimum_size(const gfx::Size& min_size);
  48   void set_maximum_size(const gfx::Size& max_size);
  49
  50  private:
  51   gfx::Size minimum_size_;
  52   gfx::Size maximum_size_;
  53 };
  54
  55 }  // namespace apps
  56
  57 #endif  // APPS_SIZE_CONSTRAINTS_H_