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// 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/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 constrained_window {
namespace {
ConstrainedWindowViewsClient* constrained_window_views_client = NULL;
// 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_, NULL);
}
// WidgetObserver overrides
void OnWidgetClosing(views::Widget* widget) override { delete this; }
// WebContentsModalDialogHostObserver overrides
void OnPositionRequiresUpdate() override {
UpdateWidgetModalDialogPosition(target_widget_, host_);
}
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(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 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) {
DCHECK(constrained_window_views_client);
// For embedded WebContents, use the embedder's WebContents for constrained
// window.
content::WebContents* web_contents =
guest_view::GuestViewBase::GetTopLevelWebContents(initiator_web_contents);
views::Widget* widget = CreateWebModalDialogViews(dialog, web_contents);
web_modal::WebContentsModalDialogManager::FromWebContents(web_contents)
->ShowModalDialog(widget->GetNativeWindow());
return widget;
}
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(constrained_window_views_client);
gfx::NativeView parent_view =
parent ? constrained_window_views_client->GetDialogHostView(parent)
: nullptr;
views::Widget* widget =
views::DialogDelegate::CreateDialogWidget(dialog, NULL, parent_view);
bool requires_positioning = dialog->UseNewStyleForThisDialog();
#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 = constrained_window_views_client->
GetModalDialogHost(parent);
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
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