Limit constrained windows to the size of the parent view.

chrome/browser/ui/views/constrained_window_views_unittest.cc

+// Copyright 2013 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 "chrome/browser/ui/views/constrained_window_views.h"
+
+#include "components/web_modal/web_contents_modal_dialog_host.h"
+#include "ui/gfx/native_widget_types.h"
+#include "ui/gfx/point.h"
+#include "ui/gfx/rect.h"
+#include "ui/gfx/size.h"
+#include "ui/views/test/views_test_base.h"
+#include "ui/views/widget/widget.h"
+#include "ui/views/window/dialog_delegate.h"
+
+namespace web_modal {
+class WebContentsModalDialogHostObserver;
+}
+
+namespace views {
+
+class DialogContents : public DialogDelegateView {
+ public:
+  DialogContents() : preferred_size_() {}

[sky, 2013/09/05 23:39:14]

nit: no need to explicitly initialize preferred_size_.

[Rune Fevang, 2013/09/06 00:04:26]

Done.

+  virtual ~DialogContents() {}
+
+  void set_preferred_size(const gfx::Size& preferred_size) {
+    preferred_size_ = preferred_size;
+  }
+
+  // Overriden from DialogDelegateView:
+  virtual View* GetContentsView() OVERRIDE { return this; }
+  virtual gfx::Size GetPreferredSize() OVERRIDE { return preferred_size_; }
+  virtual gfx::Size GetMinimumSize() OVERRIDE { return gfx::Size(); }
+
+ private:
+  gfx::Size preferred_size_;
+
+  DISALLOW_COPY_AND_ASSIGN(DialogContents);
+};
+
+class DialogHost : public web_modal::WebContentsModalDialogHost {
+ public:
+  explicit DialogHost(gfx::NativeView host_view)
+      : host_view_(host_view),
+        max_dialog_size_(5000, 5000) {
+  }
+
+  virtual ~DialogHost() {}
+
+  void set_max_dialog_size(const gfx::Size& max_dialog_size) {
+    max_dialog_size_ = max_dialog_size;
+  }
+
+  // Overridden from WebContentsModalDialogHost:
+  virtual gfx::NativeView GetHostView() const OVERRIDE { return host_view_; }
+  virtual gfx::Point GetDialogPosition(const gfx::Size& size) OVERRIDE {
+    return gfx::Point();
+  }
+  virtual gfx::Size GetMaximumDialogSize() OVERRIDE { return max_dialog_size_; }
+  virtual void AddObserver(
+      web_modal::WebContentsModalDialogHostObserver* observer) OVERRIDE {};
+  virtual void RemoveObserver(
+      web_modal::WebContentsModalDialogHostObserver* observer) OVERRIDE {};
+
+ private:
+  gfx::NativeView host_view_;
+  gfx::Size max_dialog_size_;
+
+  DISALLOW_COPY_AND_ASSIGN(DialogHost);
+};
+
+typedef ViewsTestBase ConstrainedWindowViewsTest;
+
+TEST_F(ConstrainedWindowViewsTest, UpdateDialogPosition) {
+  Widget::InitParams params = CreateParams(Widget::InitParams::TYPE_WINDOW);
+  params.ownership = Widget::InitParams::WIDGET_OWNS_NATIVE_WIDGET;
+  Widget parent;
+  parent.Init(params);
+
+  DialogContents* contents = new DialogContents;
+  Widget* dialog =
+      CreateBrowserModalDialogViews(contents, parent.GetNativeWindow());
+  DialogHost dialog_host(parent.GetNativeView());
+  UpdateWebContentsModalDialogPosition(dialog, &dialog_host);
+
+  // Set the preferred size to something larger than the size of a dialog with
+  // no content.
+  gfx::Size preferred_size = dialog->GetClientAreaBoundsInScreen().size();
+  preferred_size.Enlarge(50, 50);
+  contents->set_preferred_size(preferred_size);
+  UpdateWebContentsModalDialogPosition(dialog, &dialog_host);
+
+  // Now increase the preferred content area and make sure the dialog grows by
+  // the same amount after the position is updated.
+  gfx::Size expected_size = dialog->GetClientAreaBoundsInScreen().size();
+  expected_size.Enlarge(200, 200);
+  preferred_size.Enlarge(200, 200);
+  contents->set_preferred_size(preferred_size);
+  UpdateWebContentsModalDialogPosition(dialog, &dialog_host);
+  EXPECT_EQ(expected_size, dialog->GetClientAreaBoundsInScreen().size());
+
+  // Make sure the dialog shrinks when the preferred content area shrinks.
+  expected_size.Enlarge(-200, -200);
+  preferred_size.Enlarge(-200, -200);
+  contents->set_preferred_size(preferred_size);
+  UpdateWebContentsModalDialogPosition(dialog, &dialog_host);
+  EXPECT_EQ(expected_size, dialog->GetClientAreaBoundsInScreen().size());
+
+  // Make sure the dialog is never larger than the max dialog size the dialog
+  // host can handle.
+  gfx::Size full_dialog_size = dialog->GetClientAreaBoundsInScreen().size();
+  gfx::Size max_dialog_size = full_dialog_size;
+  max_dialog_size.Enlarge(-100, -100);
+  dialog_host.set_max_dialog_size(max_dialog_size);
+  UpdateWebContentsModalDialogPosition(dialog, &dialog_host);
+  // The top border of the dialog is intentionally drawn outside the area
+  // specified by the dialog host, so add it to the size the dialog is expected
+  // to occupy.
+  expected_size = max_dialog_size;
+  Border* border = dialog->non_client_view()->frame_view()->border();
+  if (border)
+    expected_size.Enlarge(0, border->GetInsets().top());
+  EXPECT_EQ(expected_size,
+            dialog->non_client_view()->GetBoundsInScreen().size());
+
+  // Enlarge the max area again and make sure the dialog again uses its
+  // preferred size.
+  dialog_host.set_max_dialog_size(gfx::Size(5000, 5000));
+  UpdateWebContentsModalDialogPosition(dialog, &dialog_host);
+  EXPECT_EQ(full_dialog_size, dialog->GetClientAreaBoundsInScreen().size());
+}
+
+}  // namespace views