osx: Add NativeWindow::SetSizeConstraints

chromium_src/extensions/browser/app_window/size_constraints.cc

@@ -0,0 +1,83 @@
+// Copyright 2014 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.
+
+#include "extensions/browser/app_window/size_constraints.h"
+
+#include <algorithm>
+
+#include "ui/gfx/geometry/insets.h"
+
+namespace extensions {
+
+SizeConstraints::SizeConstraints()
+    : maximum_size_(kUnboundedSize, kUnboundedSize) {}
+
+SizeConstraints::SizeConstraints(const gfx::Size& min_size,
+                                 const gfx::Size& max_size)
+    : minimum_size_(min_size), maximum_size_(max_size) {}
+
+SizeConstraints::~SizeConstraints() {}
+
+// static
+gfx::Size SizeConstraints::AddFrameToConstraints(
+    const gfx::Size& size_constraints,
+    const gfx::Insets& frame_insets) {
+  return gfx::Size(
+      size_constraints.width() == kUnboundedSize
+          ? kUnboundedSize
+          : size_constraints.width() + frame_insets.width(),
+      size_constraints.height() == kUnboundedSize
+          ? kUnboundedSize
+          : size_constraints.height() + frame_insets.height());
+}
+
+gfx::Size SizeConstraints::ClampSize(gfx::Size size) const {
+  const gfx::Size max_size = GetMaximumSize();
+  if (max_size.width() != kUnboundedSize)
+    size.set_width(std::min(size.width(), max_size.width()));
+  if (max_size.height() != kUnboundedSize)
+    size.set_height(std::min(size.height(), max_size.height()));
+  size.SetToMax(GetMinimumSize());
+  return size;
+}
+
+bool SizeConstraints::HasMinimumSize() const {
+  const gfx::Size min_size = GetMinimumSize();
+  return min_size.width() != kUnboundedSize ||
+         min_size.height() != kUnboundedSize;
+}
+
+bool SizeConstraints::HasMaximumSize() const {
+  const gfx::Size max_size = GetMaximumSize();
+  return max_size.width() != kUnboundedSize ||
+         max_size.height() != kUnboundedSize;
+}
+
+bool SizeConstraints::HasFixedSize() const {
+  return !GetMinimumSize().IsEmpty() && GetMinimumSize() == GetMaximumSize();
+}
+
+gfx::Size SizeConstraints::GetMinimumSize() const {
+  return minimum_size_;
+}
+
+gfx::Size SizeConstraints::GetMaximumSize() const {
+  return gfx::Size(
+      maximum_size_.width() == kUnboundedSize
+          ? kUnboundedSize
+          : std::max(maximum_size_.width(), minimum_size_.width()),
+      maximum_size_.height() == kUnboundedSize
+          ? kUnboundedSize
+          : std::max(maximum_size_.height(), minimum_size_.height()));
+}
+
+void SizeConstraints::set_minimum_size(const gfx::Size& min_size) {
+  minimum_size_ = min_size;
+}
+
+void SizeConstraints::set_maximum_size(const gfx::Size& max_size) {
+  maximum_size_ = max_size;
+}
+
+}  // namespace extensions

chromium_src/extensions/browser/app_window/size_constraints.h

@@ -0,0 +1,57 @@
+// Copyright 2014 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 EXTENSIONS_BROWSER_APP_WINDOW_SIZE_CONSTRAINTS_H_
+#define EXTENSIONS_BROWSER_APP_WINDOW_SIZE_CONSTRAINTS_H_
+
+#include "ui/gfx/geometry/size.h"
+
+namespace gfx {
+class Insets;
+}
+
+namespace extensions {
+
+class SizeConstraints {
+ public:
+  // The value SizeConstraints uses to represent an unbounded width or height.
+  // This is an enum so that it can be declared inline here.
+  enum { kUnboundedSize = 0 };
+
+  SizeConstraints();
+  SizeConstraints(const gfx::Size& min_size, const gfx::Size& max_size);
+  ~SizeConstraints();
+
+  // Adds frame insets to a size constraint.
+  static gfx::Size AddFrameToConstraints(const gfx::Size& size_constraints,
+                                         const gfx::Insets& frame_insets);
+
+  // Returns the bounds with its size clamped to the min/max size.
+  gfx::Size ClampSize(gfx::Size size) const;
+
+  // When gfx::Size is used as a min/max size, a zero represents an unbounded
+  // component. This method checks whether either component is specified.
+  // Note we can't use gfx::Size::IsEmpty as it returns true if either width
+  // or height is zero.
+  bool HasMinimumSize() const;
+  bool HasMaximumSize() const;
+
+  // This returns true if all components are specified, and min and max are
+  // equal.
+  bool HasFixedSize() const;
+
+  gfx::Size GetMaximumSize() const;
+  gfx::Size GetMinimumSize() const;
+
+  void set_minimum_size(const gfx::Size& min_size);
+  void set_maximum_size(const gfx::Size& max_size);
+
+ private:
+  gfx::Size minimum_size_;
+  gfx::Size maximum_size_;
+};
+
+}  // namespace extensions
+
+#endif  // EXTENSIONS_BROWSER_APP_WINDOW_SIZE_CONSTRAINTS_H_