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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 <set>
#include "base/memory/scoped_ptr.h"
#include "chrome/browser/platform_util.h"
#include "components/constrained_window/constrained_window_views.h"
#include "components/web_modal/single_web_contents_dialog_manager.h"
#include "components/web_modal/web_contents_modal_dialog_host.h"
#include "components/web_modal/web_contents_modal_dialog_manager.h"
#include "ui/gfx/geometry/point.h"
#include "ui/gfx/geometry/size.h"
#include "ui/views/border.h"
#include "ui/views/widget/widget.h"
#include "ui/views/widget/widget_delegate.h"
#include "ui/views/widget/widget_observer.h"
#include "ui/views/window/dialog_delegate.h"
#include "ui/views/window/non_client_view.h"
#if defined(USE_AURA)
#include "ui/aura/client/aura_constants.h"
#include "ui/aura/window.h"
#include "ui/wm/core/visibility_controller.h"
#include "ui/wm/core/window_animations.h"
#include "ui/wm/core/window_modality_controller.h"
#endif
using web_modal::SingleWebContentsDialogManager;
using web_modal::SingleWebContentsDialogManagerDelegate;
using web_modal::WebContentsModalDialogHost;
using web_modal::ModalDialogHostObserver;
namespace {
class NativeWebContentsModalDialogManagerViews
: public SingleWebContentsDialogManager,
public ModalDialogHostObserver,
public views::WidgetObserver {
public:
NativeWebContentsModalDialogManagerViews(
gfx::NativeWindow dialog,
SingleWebContentsDialogManagerDelegate* native_delegate)
: native_delegate_(native_delegate),
dialog_(dialog),
host_(NULL) {
ManageDialog();
}
~NativeWebContentsModalDialogManagerViews() override {
if (host_)
host_->RemoveObserver(this);
for (std::set<views::Widget*>::iterator it = observed_widgets_.begin();
it != observed_widgets_.end();
++it) {
(*it)->RemoveObserver(this);
}
}
// Sets up this object to manage the dialog_. Registers for closing events
// in order to notify the delegate.
virtual void ManageDialog() {
views::Widget* widget = GetWidget(dialog());
widget->AddObserver(this);
observed_widgets_.insert(widget);
widget->set_movement_disabled(true);
#if defined(USE_AURA)
// TODO(wittman): remove once the new visual style is complete
widget->GetNativeWindow()->SetProperty(aura::client::kConstrainedWindowKey,
true);
wm::SetWindowVisibilityAnimationType(
widget->GetNativeWindow(),
wm::WINDOW_VISIBILITY_ANIMATION_TYPE_ROTATE);
gfx::NativeView parent = platform_util::GetParent(widget->GetNativeView());
wm::SetChildWindowVisibilityChangesAnimated(parent);
// No animations should get performed on the window since that will re-order
// the window stack which will then cause many problems.
if (parent && parent->parent()) {
parent->parent()->SetProperty(aura::client::kAnimationsDisabledKey, true);
}
wm::SetModalParent(
widget->GetNativeWindow(),
platform_util::GetParent(widget->GetNativeView()));
#endif
}
// SingleWebContentsDialogManager overrides
void Show() override {
views::Widget* widget = GetWidget(dialog());
#if defined(USE_AURA)
scoped_ptr<wm::SuspendChildWindowVisibilityAnimations> suspend;
if (shown_widgets_.find(widget) != shown_widgets_.end()) {
suspend.reset(new wm::SuspendChildWindowVisibilityAnimations(
widget->GetNativeWindow()->parent()));
}
#endif
// Host may be NULL during tab drag on Views/Win32.
if (host_)
constrained_window::UpdateWebContentsModalDialogPosition(widget, host_);
widget->Show();
Focus();
#if defined(USE_AURA)
// TODO(pkotwicz): Control the z-order of the constrained dialog via
// views::kHostViewKey. We will need to ensure that the parent window's
// shadows are below the constrained dialog in z-order when we do this.
shown_widgets_.insert(widget);
#endif
}
void Hide() override {
views::Widget* widget = GetWidget(dialog());
#if defined(USE_AURA)
scoped_ptr<wm::SuspendChildWindowVisibilityAnimations> suspend;
suspend.reset(new wm::SuspendChildWindowVisibilityAnimations(
widget->GetNativeWindow()->parent()));
#endif
widget->Hide();
}
void Close() override { GetWidget(dialog())->Close(); }
void Focus() override {
views::Widget* widget = GetWidget(dialog());
if (widget->widget_delegate() &&
widget->widget_delegate()->GetInitiallyFocusedView())
widget->widget_delegate()->GetInitiallyFocusedView()->RequestFocus();
#if defined(USE_AURA)
// We don't necessarily have a RootWindow yet.
if (widget->GetNativeView()->GetRootWindow())
widget->GetNativeView()->Focus();
#endif
}
void Pulse() override {}
// WebContentsModalDialogHostObserver overrides
void OnPositionRequiresUpdate() override {
DCHECK(host_);
for (std::set<views::Widget*>::iterator it = observed_widgets_.begin();
it != observed_widgets_.end();
++it) {
constrained_window::UpdateWebContentsModalDialogPosition(*it, host_);
}
}
void OnHostDestroying() override {
host_->RemoveObserver(this);
host_ = NULL;
}
// views::WidgetObserver overrides
// NOTE(wittman): OnWidgetClosing is overriden to ensure that, when the widget
// is explicitly closed, the destruction occurs within the same call
// stack. This avoids event races that lead to non-deterministic destruction
// ordering in e.g. the print preview dialog. OnWidgetDestroying is overridden
// because OnWidgetClosing is *only* invoked on explicit close, not when the
// widget is implicitly destroyed due to its parent being closed. This
// situation occurs with app windows. WidgetClosing removes the observer, so
// only one of these two functions is ever invoked for a given widget.
void OnWidgetClosing(views::Widget* widget) override {
WidgetClosing(widget);
}
void OnWidgetDestroying(views::Widget* widget) override {
WidgetClosing(widget);
}
void HostChanged(web_modal::WebContentsModalDialogHost* new_host) override {
if (host_)
host_->RemoveObserver(this);
host_ = new_host;
// |host_| may be null during WebContents destruction or Win32 tab dragging.
if (host_) {
host_->AddObserver(this);
for (std::set<views::Widget*>::iterator it = observed_widgets_.begin();
it != observed_widgets_.end();
++it) {
views::Widget::ReparentNativeView((*it)->GetNativeView(),
host_->GetHostView());
}
OnPositionRequiresUpdate();
}
}
gfx::NativeWindow dialog() override { return dialog_; }
private:
static views::Widget* GetWidget(gfx::NativeWindow dialog) {
views::Widget* widget = views::Widget::GetWidgetForNativeWindow(dialog);
DCHECK(widget);
return widget;
}
void WidgetClosing(views::Widget* widget) {
#if defined(USE_AURA)
gfx::NativeView view = platform_util::GetParent(widget->GetNativeView());
// Allow the parent to animate again.
if (view && view->parent())
view->parent()->ClearProperty(aura::client::kAnimationsDisabledKey);
#endif
widget->RemoveObserver(this);
observed_widgets_.erase(widget);
#if defined(USE_AURA)
shown_widgets_.erase(widget);
#endif
// Will cause this object to be deleted.
native_delegate_->WillClose(widget->GetNativeWindow());
}
SingleWebContentsDialogManagerDelegate* native_delegate_;
gfx::NativeWindow dialog_;
WebContentsModalDialogHost* host_;
std::set<views::Widget*> observed_widgets_;
std::set<views::Widget*> shown_widgets_;
DISALLOW_COPY_AND_ASSIGN(NativeWebContentsModalDialogManagerViews);
};
} // namespace
namespace web_modal {
SingleWebContentsDialogManager*
WebContentsModalDialogManager::CreateNativeWebModalManager(
gfx::NativeWindow dialog,
SingleWebContentsDialogManagerDelegate* native_delegate) {
return new NativeWebContentsModalDialogManagerViews(dialog, native_delegate);
}
} // namespace web_modal
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