Componentize Constrained Window Views

components/constrained_window/constrained_window_views.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 "chrome/browser/ui/views/constrained_window_views.h"
+#include "components/constrained_window/constrained_window_views.h"
 
 #include <algorithm>
 
-#include "chrome/browser/ui/browser_finder.h"
+#include "components/constrained_window/constrained_window_views_client.h"
 #include "components/web_modal/popup_manager.h"
 #include "components/web_modal/web_contents_modal_dialog_host.h"
-#include "extensions/browser/guest_view/guest_view_base.h"
 #include "ui/views/border.h"
 #include "ui/views/widget/widget.h"
 #include "ui/views/widget/widget_observer.h"
 #include "ui/views/window/dialog_delegate.h"
 
 using web_modal::ModalDialogHost;
 using web_modal::ModalDialogHostObserver;
 
 namespace {
+
+ConstrainedWindowViewsClient* constrained_window_views_client = NULL;
+
 // The name of a key to store on the window handle to associate
-// BrowserModalDialogHostObserverViews with the Widget.
-const char* const kBrowserModalDialogHostObserverViewsKey =
-    "__BROWSER_MODAL_DIALOG_HOST_OBSERVER_VIEWS__";
+// WidgetModalDialogHostObserverViews with the Widget.
+const char* const kWidgetModalDialogHostObserverViewsKey =
+    "__WIDGET_MODAL_DIALOG_HOST_OBSERVER_VIEWS__";
 
 // Applies positioning changes from the ModalDialogHost to the Widget.
-class BrowserModalDialogHostObserverViews
+class WidgetModalDialogHostObserverViews
     : public views::WidgetObserver,
       public ModalDialogHostObserver {
  public:
-  BrowserModalDialogHostObserverViews(ModalDialogHost* host,
-                                      views::Widget* target_widget,
-                                      const char *const native_window_property)
+  WidgetModalDialogHostObserverViews(ModalDialogHost* host,
+                                     views::Widget* target_widget,
+                                     const char *const native_window_property)
       : host_(host),
         target_widget_(target_widget),
         native_window_property_(native_window_property) {
     DCHECK(host_);
     DCHECK(target_widget_);
     host_->AddObserver(this);
     target_widget_->AddObserver(this);
   }
 
-  virtual ~BrowserModalDialogHostObserverViews() {
+  virtual ~WidgetModalDialogHostObserverViews() {
     if (host_)
       host_->RemoveObserver(this);
     target_widget_->RemoveObserver(this);
     target_widget_->SetNativeWindowProperty(native_window_property_, NULL);
   }
 
   // WidgetObserver overrides
   virtual void OnWidgetClosing(views::Widget* widget) override {
     delete this;
   }
 
   // WebContentsModalDialogHostObserver overrides
   virtual void OnPositionRequiresUpdate() override {
-    UpdateBrowserModalDialogPosition(target_widget_, host_);
+    UpdateWidgetModalDialogPosition(target_widget_, host_);
   }
 
   virtual void OnHostDestroying() override {
     host_->RemoveObserver(this);
     host_ = NULL;
   }
 
  private:
   ModalDialogHost* host_;
   views::Widget* target_widget_;
   const char* const native_window_property_;
 
-  DISALLOW_COPY_AND_ASSIGN(BrowserModalDialogHostObserverViews);
+  DISALLOW_COPY_AND_ASSIGN(WidgetModalDialogHostObserverViews);
 };
 
 void UpdateModalDialogPosition(views::Widget* widget,
                                web_modal::ModalDialogHost* dialog_host,
                                const gfx::Size& size) {
   // Do not forcibly update the dialog widget position if it is being dragged.
   if (widget->HasCapture())
     return;
 
   gfx::Point position = dialog_host->GetDialogPosition(size);
   views::Border* border = widget->non_client_view()->frame_view()->border();
   // Border may be null during widget initialization.
   if (border) {
     // Align the first row of pixels inside the border. This is the apparent
     // top of the dialog.
     position.set_y(position.y() - border->GetInsets().top());
   }
 
   if (widget->is_top_level()) {
     position +=
         views::Widget::GetWidgetForNativeView(dialog_host->GetHostView())->
             GetClientAreaBoundsInScreen().OffsetFromOrigin();
   }
 
   widget->SetBounds(gfx::Rect(position, size));
 }
 
 }  // namespace
 
+// static
+void SetConstrainedWindowViewsClient(
+    scoped_ptr<ConstrainedWindowViewsClient> new_client) {
+  delete constrained_window_views_client;
+  constrained_window_views_client = new_client.release();
+}
+
 void UpdateWebContentsModalDialogPosition(
     views::Widget* widget,
     web_modal::WebContentsModalDialogHost* dialog_host) {
   gfx::Size size = widget->GetRootView()->GetPreferredSize();
   gfx::Size max_size = dialog_host->GetMaximumDialogSize();
   // Enlarge the max size by the top border, as the dialog will be shifted
   // outside the area specified by the dialog host by this amount later.
   views::Border* border =
       widget->non_client_view()->frame_view()->border();
   // Border may be null during widget initialization.
   if (border)
     max_size.Enlarge(0, border->GetInsets().top());
   size.SetToMin(max_size);
   UpdateModalDialogPosition(widget, dialog_host, size);
 }
 
-void UpdateBrowserModalDialogPosition(views::Widget* widget,
-                                      web_modal::ModalDialogHost* dialog_host) {
+void UpdateWidgetModalDialogPosition(views::Widget* widget,
+                                     web_modal::ModalDialogHost* dialog_host) {
   UpdateModalDialogPosition(widget, dialog_host,
                             widget->GetRootView()->GetPreferredSize());
 }
 
 views::Widget* ShowWebModalDialogViews(
     views::WidgetDelegate* dialog,
     content::WebContents* initiator_web_contents) {
-  extensions::GuestViewBase* guest_view =
-      extensions::GuestViewBase::FromWebContents(initiator_web_contents);
+  DCHECK(constrained_window_views_client);
   // For embedded WebContents, use the embedder's WebContents for constrained
   // window.
-  content::WebContents* web_contents =
-      guest_view && guest_view->embedder_web_contents() ?
-          guest_view->embedder_web_contents() : initiator_web_contents;
+  content::WebContents* web_contents = constrained_window_views_client->
+      GetEmbedderWebContents(initiator_web_contents);
   views::Widget* widget = CreateWebModalDialogViews(dialog, web_contents);
   web_modal::PopupManager* popup_manager =
       web_modal::PopupManager::FromWebContents(web_contents);
   popup_manager->ShowModalDialog(widget->GetNativeWindow(), web_contents);
   return widget;
 }
 
 views::Widget* CreateWebModalDialogViews(views::WidgetDelegate* dialog,
                                          content::WebContents* web_contents) {
   DCHECK_EQ(ui::MODAL_TYPE_CHILD, dialog->GetModalType());
   web_modal::PopupManager* popup_manager =
       web_modal::PopupManager::FromWebContents(web_contents);
   const gfx::NativeWindow parent = popup_manager->GetHostView();
   return views::DialogDelegate::CreateDialogWidget(dialog, NULL, parent);
 }
 
 // TODO(gbillock): Replace this with PopupManager calls.
 views::Widget* CreateBrowserModalDialogViews(views::DialogDelegate* dialog,
                                              gfx::NativeWindow parent) {
   views::Widget* widget =
       views::DialogDelegate::CreateDialogWidget(dialog, NULL, parent);
   if (!dialog->UseNewStyleForThisDialog())
     return widget;
-
-  // Get the browser dialog management and hosting components from |parent|.
-  Browser* browser = chrome::FindBrowserWithWindow(parent);
-  if (browser) {
-    ChromeWebModalDialogManagerDelegate* manager = browser;
-    ModalDialogHost* host = manager->GetWebContentsModalDialogHost();
+  DCHECK(constrained_window_views_client);
+  ModalDialogHost* host = constrained_window_views_client->
+      GetModalDialogHost(parent);
+  if (host) {
     DCHECK_EQ(parent, host->GetHostView());
     ModalDialogHostObserver* dialog_host_observer =
-        new BrowserModalDialogHostObserverViews(
-            host, widget, kBrowserModalDialogHostObserverViewsKey);
+        new WidgetModalDialogHostObserverViews(
+            host, widget, kWidgetModalDialogHostObserverViewsKey);
     dialog_host_observer->OnPositionRequiresUpdate();
   }
   return widget;
 }