Keep a web dialog window centered over the content area

content/browser/web_contents/web_contents_view_aura.cc

 // Copyright (c) 2012 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 "content/browser/web_contents/web_contents_view_aura.h"
 
 #include "base/utf_string_conversions.h"
 #include "content/browser/renderer_host/dip_util.h"
 #include "content/browser/renderer_host/render_view_host_factory.h"
 #include "content/browser/web_contents/interstitial_page_impl.h"
 #include "content/browser/web_contents/web_contents_impl.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/render_widget_host.h"
 #include "content/public/browser/render_widget_host_view.h"
 #include "content/public/browser/web_contents_delegate.h"
 #include "content/public/browser/web_contents_view_delegate.h"
 #include "content/public/browser/web_drag_dest_delegate.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebInputEvent.h"
+#include "ui/aura/client/aura_constants.h"
 #include "ui/aura/client/drag_drop_client.h"
 #include "ui/aura/client/drag_drop_delegate.h"
 #include "ui/aura/root_window.h"
 #include "ui/aura/window.h"
 #include "ui/base/clipboard/custom_data_helper.h"
 #include "ui/base/dragdrop/drag_drop_types.h"
 #include "ui/base/dragdrop/os_exchange_data.h"
 #include "ui/base/dragdrop/os_exchange_data_provider_aura.h"
 #include "ui/base/events/event.h"
 #include "ui/base/hit_test.h"
@@ skipping 453 matching lines @@
 
 gfx::Size WebContentsViewAura::GetMinimumSize() const {
   return gfx::Size();
 }
 
 void WebContentsViewAura::OnBoundsChanged(const gfx::Rect& old_bounds,
                                           const gfx::Rect& new_bounds) {
   SizeChangedCommon(new_bounds.size());
   if (delegate_.get())
     delegate_->SizeChanged(new_bounds.size());
+
+  // Constrained web dialogs, need to be kept centered over our content area.
+  for (size_t i = 0; i < window_->children().size(); i++) {
+    if (window_->children()[i]->GetProperty(
+            aura::client::kConstrainedWindowKey)) {
+      gfx::Rect bounds = window_->children()[i]->bounds();
+      bounds.Offset((new_bounds.width() - old_bounds.width()) / 2,
+                    (new_bounds.height() - old_bounds.height()) / 2);
+      window_->children()[i]->SetBounds(bounds);
+    }
+  }
 }
 
 void WebContentsViewAura::OnFocus(aura::Window* old_focused_window) {
 }
 
 void WebContentsViewAura::OnBlur() {
 }
 
 gfx::NativeCursor WebContentsViewAura::GetCursor(const gfx::Point& point) {
   return gfx::kNullCursor;
@@ skipping 142 matching lines @@
     OnDragEntered(event);
 
   web_contents_->GetRenderViewHost()->DragTargetDrop(
       event.location(),
       gfx::Screen::GetCursorScreenPoint(),
       ConvertAuraEventFlagsToWebInputEventModifiers(event.flags()));
   if (drag_dest_delegate_)
     drag_dest_delegate_->OnDrop();
   return current_drag_op_;
 }