[MacViews] Implement size constraints for app windows.

ui/views/cocoa/bridged_native_widget.mm

 // 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.
 
 #import "ui/views/cocoa/bridged_native_widget.h"
 
 #import <objc/runtime.h>
 
 #include "base/logging.h"
 #include "base/mac/mac_util.h"
 #import "base/mac/sdk_forward_declarations.h"
 #include "base/thread_task_runner_handle.h"
 #include "ui/base/ime/input_method.h"
 #include "ui/base/ime/input_method_factory.h"
 #include "ui/base/ui_base_switches_util.h"
 #include "ui/gfx/display.h"
 #include "ui/gfx/geometry/dip_util.h"
 #import "ui/gfx/mac/coordinate_conversion.h"
+#import "ui/gfx/mac/nswindow_frame_controls.h"
 #include "ui/gfx/screen.h"
 #import "ui/views/cocoa/cocoa_mouse_capture.h"
 #import "ui/views/cocoa/bridged_content_view.h"
 #import "ui/views/cocoa/views_nswindow_delegate.h"
 #include "ui/views/widget/native_widget_mac.h"
 #include "ui/views/ime/input_method_bridge.h"
 #include "ui/views/ime/null_input_method.h"
 #include "ui/views/view.h"
 #include "ui/views/views_delegate.h"
 #include "ui/views/widget/widget.h"
 #include "ui/views/widget/widget_aura_utils.h"
+#include "ui/views/widget/widget_delegate.h"
 
 // The NSView that hosts the composited CALayer drawing the UI. It fills the
 // window but is not hittable so that accessibility hit tests always go to the
 // BridgedContentView.
 @interface ViewsCompositorSuperview : NSView
 @end
 
 @implementation ViewsCompositorSuperview
 - (NSView*)hitTest:(NSPoint)aPoint {
   return nil;
@@ skipping 441 matching lines @@
     if (is_key) {
       widget->OnNativeFocus();
       widget->GetFocusManager()->RestoreFocusedView();
     } else {
       widget->OnNativeBlur();
       widget->GetFocusManager()->StoreFocusedView(true);
     }
   }
 }
 
+void BridgedNativeWidget::OnSizeConstraintsChanged() {
+  NSWindow* window = ns_window();
+  Widget* widget = native_widget_mac()->GetWidget();
+  gfx::Size min_size = widget->GetMinimumSize();
+  gfx::Size max_size = widget->GetMaximumSize();
+  bool is_resizable = widget->widget_delegate()->CanResize();
+  bool shows_resize_controls =
+      is_resizable && (min_size.IsEmpty() || min_size != max_size);
+  bool shows_fullscreen_controls =
+      is_resizable && widget->widget_delegate()->CanMaximize();
+
+  gfx::ApplyNSWindowSizeConstraints(window, min_size, max_size,
+                                    shows_resize_controls,
+                                    shows_fullscreen_controls);
+}
+
 InputMethod* BridgedNativeWidget::CreateInputMethod() {
   if (switches::IsTextInputFocusManagerEnabled())
     return new NullInputMethod();
 
   return new InputMethodBridge(this, GetHostInputMethod(), true);
 }
 
 ui::InputMethod* BridgedNativeWidget::GetHostInputMethod() {
   if (!input_method_) {
     // Delegate is NULL because Mac IME does not need DispatchKeyEventPostIME
@@ skipping 283 matching lines @@
       window_, &kWindowPropertiesKey);
   if (!properties) {
     properties = [NSMutableDictionary dictionary];
     objc_setAssociatedObject(window_, &kWindowPropertiesKey,
                              properties, OBJC_ASSOCIATION_RETAIN);
   }
   return properties;
 }
 
 }  // namespace views