components/constrained_window/constrained_window_views.cc - chromium/src.git - Git at Google

 // 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 "components/constrained_window/constrained_window_views.h"

 #include <algorithm>

 #include "base/macros.h"
 #include "build/build_config.h"
 #include "components/constrained_window/constrained_window_views_client.h"
 #include "components/guest_view/browser/guest_view_base.h"
 #include "components/web_modal/web_contents_modal_dialog_host.h"
 #include "components/web_modal/web_contents_modal_dialog_manager.h"
 #include "components/web_modal/web_contents_modal_dialog_manager_delegate.h"
 #include "ui/display/display.h"
 #include "ui/display/screen.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"

 #if defined(OS_MACOSX)
 #import "components/constrained_window/native_web_contents_modal_dialog_manager_views_mac.h"
 #endif

 using web_modal::ModalDialogHost;
 using web_modal::ModalDialogHostObserver;

 namespace constrained_window {
 namespace {

 ConstrainedWindowViewsClient* constrained_window_views_client = nullptr;

 // The name of a key to store on the window handle to associate
 // WidgetModalDialogHostObserverViews with the Widget.
 const char* const kWidgetModalDialogHostObserverViewsKey =
     "__WIDGET_MODAL_DIALOG_HOST_OBSERVER_VIEWS__";

 // Applies positioning changes from the ModalDialogHost to the Widget.
 class WidgetModalDialogHostObserverViews
     : public views::WidgetObserver,
       public ModalDialogHostObserver {
  public:
   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);
   }

   ~WidgetModalDialogHostObserverViews() override {
     if (host_)
       host_->RemoveObserver(this);
     target_widget_->RemoveObserver(this);
     target_widget_->SetNativeWindowProperty(native_window_property_, nullptr);
   }

   // WidgetObserver overrides
   void OnWidgetDestroying(views::Widget* widget) override { delete this; }

   // WebContentsModalDialogHostObserver overrides
   void OnPositionRequiresUpdate() override {
     UpdateWidgetModalDialogPosition(target_widget_, host_);
   }

   void OnHostDestroying() override {
     host_->RemoveObserver(this);
     host_ = nullptr;
   }

  private:
   ModalDialogHost* host_;
   views::Widget* target_widget_;
   const char* const native_window_property_;

   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;

   views::Widget* host_widget =
       views::Widget::GetWidgetForNativeView(dialog_host->GetHostView());

   // If the host view is not backed by a Views::Widget, just update the widget
   // size. This can happen on MacViews under the Cocoa browser where the window
   // modal dialogs are displayed as sheets, and their position is managed by a
   // ConstrainedWindowSheetController instance.
   if (!host_widget) {
     widget->SetSize(size);
     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 += host_widget->GetClientAreaBoundsInScreen().OffsetFromOrigin();
     // If the dialog extends partially off any display, clamp its position to
     // be fully visible within that display. If the dialog doesn't intersect
     // with any display clamp its position to be fully on the nearest display.
     gfx::Rect display_rect = gfx::Rect(position, size);
     const display::Display display =
         display::Screen::GetScreen()->GetDisplayNearestView(
             dialog_host->GetHostView());
     const gfx::Rect work_area = display.work_area();
     if (!work_area.Contains(display_rect))
       display_rect.AdjustToFit(work_area);
     position = display_rect.origin();
   }

   widget->SetBounds(gfx::Rect(position, size));
 }

 }  // namespace

 // static
 void SetConstrainedWindowViewsClient(
     std::unique_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 UpdateWidgetModalDialogPosition(views::Widget* widget,
                                      web_modal::ModalDialogHost* dialog_host) {
   UpdateModalDialogPosition(widget, dialog_host,
                             widget->GetRootView()->GetPreferredSize());
 }

 content::WebContents* GetTopLevelWebContents(
     content::WebContents* initiator_web_contents) {
   return guest_view::GuestViewBase::GetTopLevelWebContents(
       initiator_web_contents);
 }

 views::Widget* ShowWebModalDialogViews(
     views::WidgetDelegate* dialog,
     content::WebContents* initiator_web_contents) {
   DCHECK(constrained_window_views_client);
   // For embedded WebContents, use the embedder's WebContents for constrained
   // window.
   content::WebContents* web_contents =
       GetTopLevelWebContents(initiator_web_contents);
   views::Widget* widget = CreateWebModalDialogViews(dialog, web_contents);
   ShowModalDialog(widget->GetNativeWindow(), web_contents);
   return widget;
 }

 #if defined(OS_MACOSX)
 views::Widget* ShowWebModalDialogWithOverlayViews(
     views::WidgetDelegate* dialog,
     content::WebContents* initiator_web_contents) {
   DCHECK(constrained_window_views_client);
   // For embedded WebContents, use the embedder's WebContents for constrained
   // window.
   content::WebContents* web_contents =
       GetTopLevelWebContents(initiator_web_contents);
   views::Widget* widget = CreateWebModalDialogViews(dialog, web_contents);
   web_modal::WebContentsModalDialogManager* manager =
       web_modal::WebContentsModalDialogManager::FromWebContents(web_contents);
   std::unique_ptr<web_modal::SingleWebContentsDialogManager> dialog_manager(
       new NativeWebContentsModalDialogManagerViewsMac(widget->GetNativeWindow(),
                                                       manager));
   manager->ShowDialogWithManager(widget->GetNativeWindow(),
                                  std::move(dialog_manager));
   return widget;
 }
 #endif

 views::Widget* CreateWebModalDialogViews(views::WidgetDelegate* dialog,
                                          content::WebContents* web_contents) {
   DCHECK_EQ(ui::MODAL_TYPE_CHILD, dialog->GetModalType());
   return views::DialogDelegate::CreateDialogWidget(
       dialog, nullptr,
       web_modal::WebContentsModalDialogManager::FromWebContents(web_contents)
           ->delegate()
           ->GetWebContentsModalDialogHost()
           ->GetHostView());
 }

 views::Widget* CreateBrowserModalDialogViews(views::DialogDelegate* dialog,
                                              gfx::NativeWindow parent) {
   DCHECK_NE(ui::MODAL_TYPE_CHILD, dialog->GetModalType());
   DCHECK_NE(ui::MODAL_TYPE_NONE, dialog->GetModalType());
   DCHECK(!parent || constrained_window_views_client);

   gfx::NativeView parent_view =
       parent ? constrained_window_views_client->GetDialogHostView(parent)
              : nullptr;
   views::Widget* widget =
       views::DialogDelegate::CreateDialogWidget(dialog, nullptr, parent_view);

   bool requires_positioning = dialog->ShouldUseCustomFrame();

 #if defined(OS_MACOSX)
   // On Mac, window modal dialogs are displayed as sheets, so their position is
   // managed by the parent window.
   requires_positioning = false;
 #endif

   if (!requires_positioning)
     return widget;

   ModalDialogHost* host =
       parent ? constrained_window_views_client->GetModalDialogHost(parent)
              : nullptr;
   if (host) {
     DCHECK_EQ(parent_view, host->GetHostView());
     ModalDialogHostObserver* dialog_host_observer =
         new WidgetModalDialogHostObserverViews(
             host, widget, kWidgetModalDialogHostObserverViewsKey);
     dialog_host_observer->OnPositionRequiresUpdate();
   }
   return widget;
 }

 }  // namespace constrained window
	// 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 "components/constrained_window/constrained_window_views.h"

	#include <algorithm>

	#include "base/macros.h"
	#include "build/build_config.h"
	#include "components/constrained_window/constrained_window_views_client.h"
	#include "components/guest_view/browser/guest_view_base.h"
	#include "components/web_modal/web_contents_modal_dialog_host.h"
	#include "components/web_modal/web_contents_modal_dialog_manager.h"
	#include "components/web_modal/web_contents_modal_dialog_manager_delegate.h"
	#include "ui/display/display.h"
	#include "ui/display/screen.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"

	#if defined(OS_MACOSX)
	#import "components/constrained_window/native_web_contents_modal_dialog_manager_views_mac.h"
	#endif

	using web_modal::ModalDialogHost;
	using web_modal::ModalDialogHostObserver;

	namespace constrained_window {
	namespace {

	ConstrainedWindowViewsClient* constrained_window_views_client = nullptr;

	// The name of a key to store on the window handle to associate
	// WidgetModalDialogHostObserverViews with the Widget.
	const char* const kWidgetModalDialogHostObserverViewsKey =
	"__WIDGET_MODAL_DIALOG_HOST_OBSERVER_VIEWS__";

	// Applies positioning changes from the ModalDialogHost to the Widget.
	class WidgetModalDialogHostObserverViews
	: public views::WidgetObserver,
	public ModalDialogHostObserver {
	public:
	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);
	}

	~WidgetModalDialogHostObserverViews() override {
	if (host_)
	host_->RemoveObserver(this);
	target_widget_->RemoveObserver(this);
	target_widget_->SetNativeWindowProperty(native_window_property_, nullptr);
	}

	// WidgetObserver overrides
	void OnWidgetDestroying(views::Widget* widget) override { delete this; }

	// WebContentsModalDialogHostObserver overrides
	void OnPositionRequiresUpdate() override {
	UpdateWidgetModalDialogPosition(target_widget_, host_);
	}

	void OnHostDestroying() override {
	host_->RemoveObserver(this);
	host_ = nullptr;
	}

	private:
	ModalDialogHost* host_;
	views::Widget* target_widget_;
	const char* const native_window_property_;

	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;

	views::Widget* host_widget =
	views::Widget::GetWidgetForNativeView(dialog_host->GetHostView());

	// If the host view is not backed by a Views::Widget, just update the widget
	// size. This can happen on MacViews under the Cocoa browser where the window
	// modal dialogs are displayed as sheets, and their position is managed by a
	// ConstrainedWindowSheetController instance.
	if (!host_widget) {
	widget->SetSize(size);
	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 += host_widget->GetClientAreaBoundsInScreen().OffsetFromOrigin();
	// If the dialog extends partially off any display, clamp its position to
	// be fully visible within that display. If the dialog doesn't intersect
	// with any display clamp its position to be fully on the nearest display.
	gfx::Rect display_rect = gfx::Rect(position, size);
	const display::Display display =
	display::Screen::GetScreen()->GetDisplayNearestView(
	dialog_host->GetHostView());
	const gfx::Rect work_area = display.work_area();
	if (!work_area.Contains(display_rect))
	display_rect.AdjustToFit(work_area);
	position = display_rect.origin();
	}

	widget->SetBounds(gfx::Rect(position, size));
	}

	} // namespace

	// static
	void SetConstrainedWindowViewsClient(
	std::unique_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 UpdateWidgetModalDialogPosition(views::Widget* widget,
	web_modal::ModalDialogHost* dialog_host) {
	UpdateModalDialogPosition(widget, dialog_host,
	widget->GetRootView()->GetPreferredSize());
	}

	content::WebContents* GetTopLevelWebContents(
	content::WebContents* initiator_web_contents) {
	return guest_view::GuestViewBase::GetTopLevelWebContents(
	initiator_web_contents);
	}

	views::Widget* ShowWebModalDialogViews(
	views::WidgetDelegate* dialog,
	content::WebContents* initiator_web_contents) {
	DCHECK(constrained_window_views_client);
	// For embedded WebContents, use the embedder's WebContents for constrained
	// window.
	content::WebContents* web_contents =
	GetTopLevelWebContents(initiator_web_contents);
	views::Widget* widget = CreateWebModalDialogViews(dialog, web_contents);
	ShowModalDialog(widget->GetNativeWindow(), web_contents);
	return widget;
	}

	#if defined(OS_MACOSX)
	views::Widget* ShowWebModalDialogWithOverlayViews(
	views::WidgetDelegate* dialog,
	content::WebContents* initiator_web_contents) {
	DCHECK(constrained_window_views_client);
	// For embedded WebContents, use the embedder's WebContents for constrained
	// window.
	content::WebContents* web_contents =
	GetTopLevelWebContents(initiator_web_contents);
	views::Widget* widget = CreateWebModalDialogViews(dialog, web_contents);
	web_modal::WebContentsModalDialogManager* manager =
	web_modal::WebContentsModalDialogManager::FromWebContents(web_contents);
	std::unique_ptr<web_modal::SingleWebContentsDialogManager> dialog_manager(
	new NativeWebContentsModalDialogManagerViewsMac(widget->GetNativeWindow(),
	manager));
	manager->ShowDialogWithManager(widget->GetNativeWindow(),
	std::move(dialog_manager));
	return widget;
	}
	#endif

	views::Widget* CreateWebModalDialogViews(views::WidgetDelegate* dialog,
	content::WebContents* web_contents) {
	DCHECK_EQ(ui::MODAL_TYPE_CHILD, dialog->GetModalType());
	return views::DialogDelegate::CreateDialogWidget(
	dialog, nullptr,
	web_modal::WebContentsModalDialogManager::FromWebContents(web_contents)
	->delegate()
	->GetWebContentsModalDialogHost()
	->GetHostView());
	}

	views::Widget* CreateBrowserModalDialogViews(views::DialogDelegate* dialog,
	gfx::NativeWindow parent) {
	DCHECK_NE(ui::MODAL_TYPE_CHILD, dialog->GetModalType());
	DCHECK_NE(ui::MODAL_TYPE_NONE, dialog->GetModalType());
	DCHECK(!parent \|\| constrained_window_views_client);

	gfx::NativeView parent_view =
	parent ? constrained_window_views_client->GetDialogHostView(parent)
	: nullptr;
	views::Widget* widget =
	views::DialogDelegate::CreateDialogWidget(dialog, nullptr, parent_view);

	bool requires_positioning = dialog->ShouldUseCustomFrame();

	#if defined(OS_MACOSX)
	// On Mac, window modal dialogs are displayed as sheets, so their position is
	// managed by the parent window.
	requires_positioning = false;
	#endif

	if (!requires_positioning)
	return widget;

	ModalDialogHost* host =
	parent ? constrained_window_views_client->GetModalDialogHost(parent)
	: nullptr;
	if (host) {
	DCHECK_EQ(parent_view, host->GetHostView());
	ModalDialogHostObserver* dialog_host_observer =
	new WidgetModalDialogHostObserverViews(
	host, widget, kWidgetModalDialogHostObserverViewsKey);
	dialog_host_observer->OnPositionRequiresUpdate();
	}
	return widget;
	}

	} // namespace constrained window