[MacViews] Implement size constraints for app windows.

ui/views/widget/native_widget_mac.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.
 
 #include "ui/views/widget/native_widget_mac.h"
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/mac/foundation_util.h"
 #include "base/mac/scoped_nsobject.h"
 #include "base/strings/sys_string_conversions.h"
 #import "ui/base/cocoa/window_size_constants.h"
 #include "ui/gfx/font_list.h"
 #import "ui/gfx/mac/coordinate_conversion.h"
 #include "ui/native_theme/native_theme.h"
 #import "ui/views/cocoa/bridged_content_view.h"
 #import "ui/views/cocoa/bridged_native_widget.h"
 #import "ui/views/cocoa/native_widget_mac_nswindow.h"
 #import "ui/views/cocoa/views_nswindow_delegate.h"
 #include "ui/views/window/native_frame_view.h"
 
 namespace views {
 namespace {
 
+// The value used to represent an unbounded width or height.
+const int kUnboundedSize = 0;
+
 NSInteger StyleMaskForParams(const Widget::InitParams& params) {
   // TODO(tapted): Determine better masks when there are use cases for it.
   if (params.remove_standard_frame)
     return NSBorderlessWindowMask;
 
   if (params.type == Widget::InitParams::TYPE_WINDOW) {
     return NSTitledWindowMask | NSClosableWindowMask |
            NSMiniaturizableWindowMask | NSResizableWindowMask;
   }
   return NSBorderlessWindowMask;
@@ skipping 483 matching lines @@
 }
 
 void NativeWidgetMac::OnRootViewLayout() {
   NOTIMPLEMENTED();
 }
 
 bool NativeWidgetMac::IsTranslucentWindowOpacitySupported() const {
   return false;
 }
 
 void NativeWidgetMac::OnSizeConstraintsChanged() {

[tapted, 2015/03/20 12:12:53]

Aura widgets also call this towards the end of InitNativeWidget() -- is that
needed?

[jackhou1, 2015/03/25 23:32:23]

ChromeNativeAppWindowViews::InitializeDefaultWindow() calls
SetContentSizeConstraints(). But it might be needed for non-app-window widgets.
Added call in NativeWidgetMac::InitNativeWidget.

-  NOTIMPLEMENTED();
+  NSWindow* window = GetNativeWindow();
+  gfx::Size minimum_size = delegate()->GetMinimumSize();
+  [window setContentMinSize:NSMakeSize(minimum_size.width(),
+                                       minimum_size.height())];
+
+  gfx::Size maximum_size = delegate()->GetMaximumSize();
+  CGFloat max_width = maximum_size.width() == kUnboundedSize
+                          ? CGFLOAT_MAX
+                          : maximum_size.width();
+  CGFloat max_height = maximum_size.height() == kUnboundedSize
+                           ? CGFLOAT_MAX
+                           : maximum_size.height();
+  [window setContentMaxSize:NSMakeSize(max_width, max_height)];
 }
 
 void NativeWidgetMac::RepostNativeEvent(gfx::NativeEvent native_event) {
   NOTIMPLEMENTED();
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // NativeWidgetMac, protected:
 
 NSWindow* NativeWidgetMac::CreateNSWindow(const Widget::InitParams& params) {
@@ skipping 100 matching lines @@
 }
 
 // static
 gfx::FontList NativeWidgetPrivate::GetWindowTitleFontList() {
   NOTIMPLEMENTED();
   return gfx::FontList();
 }
 
 }  // namespace internal
 }  // namespace views