MacViews: Implement NativeViewHostMac (take 3)

ui/views/controls/native/native_view_host_mac_unittest.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/controls/native/native_view_host_mac.h"
+
+#include <Cocoa/Cocoa.h>
+
+#include "base/mac/scoped_nsobject.h"
+#include "base/memory/scoped_ptr.h"
+#include "ui/views/controls/native/native_view_host.h"
+#include "ui/views/controls/native/native_view_host_test_base.h"
+#include "ui/views/view.h"
+#include "ui/views/widget/widget.h"
+
+namespace views {
+
+class NativeViewHostMacTest : public test::NativeViewHostTestBase {
+ public:
+  NativeViewHostMacTest() {}
+
+  NativeViewHostMac* native_host() {
+    return static_cast<NativeViewHostMac*>(GetNativeWrapper());
+  }
+
+  void CreateHost() {
+    CreateTopLevel();
+    CreateTestingHost();
+    native_view_.reset([[NSView alloc] initWithFrame:NSZeroRect]);
+
+    // Verify the expectation that the NativeViewHostWrapper is only created
+    // after the NativeViewHost is added to a widget.
+    EXPECT_FALSE(native_host());
+    toplevel()->GetRootView()->AddChildView(host());
+    EXPECT_TRUE(native_host());
+
+    host()->Attach(native_view_);
+  }
+
+ protected:
+  base::scoped_nsobject<NSView> native_view_;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(NativeViewHostMacTest);
+};
+
+// Test destroying the top level widget before destroying the NativeViewHost.
+// On Mac, also ensure that the native view is removed from its superview when
+// the Widget containing its host is destroyed.
+TEST_F(NativeViewHostMacTest, DestroyWidget) {
+  ResetHostDestroyedCount();
+  CreateHost();
+  ReleaseHost();
+  EXPECT_EQ(0, host_destroyed_count());
+  EXPECT_TRUE([native_view_ superview]);
+  DestroyTopLevel();
+  EXPECT_FALSE([native_view_ superview]);
+  EXPECT_EQ(1, host_destroyed_count());
+}
+
+// Ensure the native view receives the correct bounds when it is attached. On
+// Mac, the bounds of the native view is relative to the NSWindow it is in, not
+// the screen, and the coordinates have to be flipped.
+TEST_F(NativeViewHostMacTest, Attach) {
+  CreateHost();
+  EXPECT_TRUE([native_view_ superview]);
+  EXPECT_TRUE([native_view_ window]);
+
+  host()->Detach();
+
+  [native_view_ setFrame:NSZeroRect];
+  toplevel()->SetBounds(gfx::Rect(64, 48, 100, 200));
+  host()->SetBounds(10, 10, 80, 60);
+
+  EXPECT_FALSE([native_view_ superview]);
+  EXPECT_FALSE([native_view_ window]);
+  EXPECT_TRUE(NSEqualRects(NSZeroRect, [native_view_ frame]));

[Andre, 2014/09/17 20:57:13]

NSIsEmptyRect()?

[tapted, 2014/09/18 08:40:14]

I grok the documentation for that as `width <= 0 || height <= 0`, so
NSEqualRects is a stronger check I think.

+
+  host()->Attach(native_view_);
+  EXPECT_TRUE([native_view_ superview]);
+  EXPECT_TRUE([native_view_ window]);
+
+  // Expect the top-left to be 10 pixels below the titlebar.
+  int bottom = toplevel()->GetClientAreaBoundsInScreen().height() - 10 - 60;
+  EXPECT_TRUE(NSEqualRects(NSMakeRect(10, bottom, 80, 60),
+                           [native_view_ frame]));
+}
+
+// Ensure the native view is hidden along with its host, and when detaching, or
+// when attaching to a host that is already hidden.
+TEST_F(NativeViewHostMacTest, NativeViewHidden) {
+  CreateHost();
+  toplevel()->SetBounds(gfx::Rect(0, 0, 100, 100));
+  host()->SetBounds(10, 10, 80, 60);
+
+  EXPECT_FALSE([native_view_ isHidden]);
+  host()->SetVisible(false);
+  EXPECT_TRUE([native_view_ isHidden]);
+  host()->SetVisible(true);
+  EXPECT_FALSE([native_view_ isHidden]);
+
+  host()->Detach();
+  EXPECT_TRUE([native_view_ isHidden]);  // Hidden when detached.
+  [native_view_ setHidden:NO];
+
+  host()->SetVisible(false);
+  EXPECT_FALSE([native_view_ isHidden]);  // Stays visible.
+  host()->Attach(native_view_);
+  EXPECT_TRUE([native_view_ isHidden]);  // Hidden when attached.
+
+  host()->Detach();
+  [native_view_ setHidden:YES];
+  host()->SetVisible(true);
+  EXPECT_TRUE([native_view_ isHidden]);  // Stays hidden.
+  host()->Attach(native_view_);
+  EXPECT_FALSE([native_view_ isHidden]);  // Made visible when attached.
+
+  EXPECT_TRUE([native_view_ superview]);
+  toplevel()->GetRootView()->RemoveChildView(host());
+  EXPECT_TRUE([native_view_ isHidden]);  // Hidden when removed from Widget.
+  EXPECT_FALSE([native_view_ superview]);
+
+  toplevel()->GetRootView()->AddChildView(host());
+  EXPECT_FALSE([native_view_ isHidden]);  // And visible when added.
+  EXPECT_TRUE([native_view_ superview]);
+}
+
+}  // namespace views