Created min size for print preview dialog and modified to allow the

components/constrained_window/native_web_contents_modal_dialog_manager_views.cc

 // Copyright 2016 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/native_web_contents_modal_dialog_manager_views.h"
 
 #include <memory>
 
 #include "components/constrained_window/constrained_window_views.h"
 #include "components/web_modal/web_contents_modal_dialog_host.h"
 #include "components/web_modal/web_contents_modal_dialog_manager.h"
+#include "ui/base/accelerators/accelerator.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/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/client/window_tree_client.h"
 #include "ui/aura/window.h"
+#include "ui/aura/window_observer.h"
 #include "ui/wm/core/visibility_controller.h"
 #include "ui/wm/core/window_animations.h"
 #include "ui/wm/core/window_modality_controller.h"
+#include "ui/wm/core/window_util.h"
 #endif
 
 using web_modal::SingleWebContentsDialogManager;
 using web_modal::SingleWebContentsDialogManagerDelegate;
 using web_modal::WebContentsModalDialogHost;
 using web_modal::ModalDialogHostObserver;
 
 namespace constrained_window {
 
 NativeWebContentsModalDialogManagerViews::
     NativeWebContentsModalDialogManagerViews(
         gfx::NativeWindow dialog,
-        SingleWebContentsDialogManagerDelegate* native_delegate)
+        SingleWebContentsDialogManagerDelegate* native_delegate,
+        bool is_toplevel,
+        ui::AcceleratorTarget* target)
     : native_delegate_(native_delegate),
       dialog_(dialog),
       host_(NULL),
-      host_destroying_(false) {
-  ManageDialog();
+      host_destroying_(false),
+      target_(target) {
+#if !defined(USE_AURA)
+  target_ = NULL;
+#endif
+  ManageDialog(is_toplevel);
 }
 
 NativeWebContentsModalDialogManagerViews::
     ~NativeWebContentsModalDialogManagerViews() {
   if (host_)
     host_->RemoveObserver(this);
 
+#if defined(USE_AURA)
+  if (host_ && host_->GetHostView() && host_->GetHostView()->HasObserver(this))
+    host_->GetHostView()->RemoveObserver(this);
+#endif
+
   for (std::set<views::Widget*>::iterator it = observed_widgets_.begin();
        it != observed_widgets_.end(); ++it) {
     (*it)->RemoveObserver(this);
   }
+
+#if defined(USE_AURA)
+  if (host_ && dialog() &&
+     !!dialog()->GetNativeWindowProperty(wm::kAllowTransientParentEventsKey)) {
+    views::Widget * parent_widget = views::Widget::GetWidgetForNativeView(
+        host_->GetHostView());
+    if (parent_widget && parent_widget->GetFocusManager()) {
+       parent_widget->GetFocusManager()->UnregisterAccelerator(
+            ui::Accelerator(ui::VKEY_ESCAPE, ui::EF_NONE), target_);
+    }
+  }
+#endif
 }
 
-void NativeWebContentsModalDialogManagerViews::ManageDialog() {
+void NativeWebContentsModalDialogManagerViews::ManageDialog(
+    bool is_toplevel) {
   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 = widget->GetNativeView()->parent();
-  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);
+  if (is_toplevel) {
+    gfx::NativeView transient_parent =
+        wm::GetTransientParent(widget->GetNativeWindow());
+    wm::SetChildWindowVisibilityChangesAnimated(
+        widget->GetNativeView()->parent());
+    if (transient_parent && transient_parent->parent()) {
+      transient_parent->parent()->SetProperty(
+          aura::client::kAnimationsDisabledKey, true);
+    }
+    widget->SetNativeWindowProperty(wm::kAllowTransientParentEventsKey,
+                                    reinterpret_cast<void*>(true));
+  } else {
+    gfx::NativeView parent = widget->GetNativeView()->parent();
+    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(),
+                       native_delegate_->GetWebContents()->GetNativeView());
   }
-
-  wm::SetModalParent(widget->GetNativeWindow(),
-                     native_delegate_->GetWebContents()->GetNativeView());
-#endif
+#endif  // defined(USE_AURA)
 }
 
 // SingleWebContentsDialogManager:
 
 void NativeWebContentsModalDialogManagerViews::Show() {
   // The host destroying means the dialogs will be destroyed in short order.
   // Avoid showing dialogs at this point as the necessary native window
   // services may not be present.
   if (host_destroying_)
     return;
 
   views::Widget* widget = GetWidget(dialog());
 #if defined(USE_AURA)
   std::unique_ptr<wm::SuspendChildWindowVisibilityAnimations> suspend;
   if (shown_widgets_.find(widget) != shown_widgets_.end()) {
-    suspend.reset(new wm::SuspendChildWindowVisibilityAnimations(
-        widget->GetNativeWindow()->parent()));
+    if (!widget->GetNativeWindowProperty(wm::kAllowTransientParentEventsKey)) {
+      suspend.reset(new wm::SuspendChildWindowVisibilityAnimations(
+          widget->GetNativeWindow()->parent()));
+    }
   }
 #endif
   ShowWidget(widget);
   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 NativeWebContentsModalDialogManagerViews::Hide() {
   views::Widget* widget = GetWidget(dialog());
 #if defined(USE_AURA)
   std::unique_ptr<wm::SuspendChildWindowVisibilityAnimations> suspend;
   suspend.reset(new wm::SuspendChildWindowVisibilityAnimations(
-      widget->GetNativeWindow()->parent()));
+        widget->GetNativeWindow()->parent()));
 #endif
   HideWidget(widget);
 }
 
 void NativeWebContentsModalDialogManagerViews::Close() {
   GetWidget(dialog())->Close();
 }
 
 void NativeWebContentsModalDialogManagerViews::Focus() {
   views::Widget* widget = GetWidget(dialog());
@@ skipping 15 matching lines @@
   DCHECK(host_);
 
   for (std::set<views::Widget*>::iterator it = observed_widgets_.begin();
        it != observed_widgets_.end(); ++it) {
     constrained_window::UpdateWebContentsModalDialogPosition(*it, host_);
   }
 }
 
 void NativeWebContentsModalDialogManagerViews::OnHostDestroying() {
   host_->RemoveObserver(this);
+#if defined(USE_AURA)
+  if (host_->GetHostView() && host_->GetHostView()->HasObserver(this))
+    host_->GetHostView()->RemoveObserver(this);
+#endif
   host_ = NULL;
   host_destroying_ = true;
 }
 
 // views::WidgetObserver:
 
 void NativeWebContentsModalDialogManagerViews::OnWidgetClosing(
     views::Widget* widget) {
   WidgetClosing(widget);
 }
 
 void NativeWebContentsModalDialogManagerViews::OnWidgetDestroying(
     views::Widget* widget) {
   WidgetClosing(widget);
 }
 
 void NativeWebContentsModalDialogManagerViews::HostChanged(
     WebContentsModalDialogHost* new_host) {
+#if defined(USE_AURA)
+  if (new_host == host_ ||
+      (new_host && !new_host->GetHostView()->GetRootWindow()))
+    // This happens sometimes in testing and will cause a crash.
+    return;
+#endif
   if (host_)
     host_->RemoveObserver(this);
 
+  // Remove window observer
+#if defined(USE_AURA)
+  if (host_ && host_->GetHostView() && host_->GetHostView()->HasObserver(this))
+    host_->GetHostView()->RemoveObserver(this);
+
+  bool toplevel = !!(dialog()->GetNativeWindowProperty(
+      wm::kAllowTransientParentEventsKey));
+
+  // Remove accelerators so that web contents don't pick up accelerators on
+  // other hosts
+  if (host_ && toplevel) {
+    views::Widget * parent_widget = views::Widget::GetWidgetForNativeView(
+        host_->GetHostView());
+    if (parent_widget && parent_widget->GetFocusManager()) {
+       parent_widget->GetFocusManager()->UnregisterAccelerator(
+            ui::Accelerator(ui::VKEY_ESCAPE, ui::EF_NONE), target_);
+    }
+  }
+#endif
+
   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());
+#if defined(USE_AURA)
+      bool widget_toplevel = !!((*it)->GetNativeWindowProperty(
+          wm::kAllowTransientParentEventsKey));
+#else
+      bool widget_toplevel = false;
+#endif
+      if(widget_toplevel) {
+#if defined(USE_AURA)
+        if ((*it)->GetNativeView()->parent())
+          (*it)->GetNativeView()->parent()->RemoveChild((*it)->GetNativeView());
+        wm::AddTransientChild(host_->GetHostView(), (*it)->GetNativeView());
+        aura::client::ParentWindowWithContext(
+            (*it)->GetNativeView(), host_->GetHostView()->GetRootWindow(),
+            (*it)->GetNativeView()->bounds());
+#endif
+      } else {
+        views::Widget::ReparentNativeView((*it)->GetNativeView(),
+                                          host_->GetHostView());
+      }
     }
-
+#if defined(USE_AURA)
+    // If there are top level widgets, need to register the accelerator and set
+    // the window observer
+    if (toplevel) {
+      host_->GetHostView()->AddObserver(this);
+      views::Widget * parent_widget = views::Widget::GetWidgetForNativeView(
+          host_->GetHostView());
+      parent_widget->GetFocusManager()->RegisterAccelerator(
+          ui::Accelerator(ui::VKEY_ESCAPE, ui::EF_NONE),
+          ui::AcceleratorManager::kNormalPriority, target_);
+    }
+#endif
     OnPositionRequiresUpdate();
   }
 }
 
 gfx::NativeWindow NativeWebContentsModalDialogManagerViews::dialog() {
   return dialog_;
 }
 
 void NativeWebContentsModalDialogManagerViews::ShowWidget(
     views::Widget* widget) {
   // |host_| may be NULL during tab drag on Views/Win32.
   if (host_)
     constrained_window::UpdateWebContentsModalDialogPosition(widget, host_);
   widget->Show();
 }
 
 void NativeWebContentsModalDialogManagerViews::HideWidget(
     views::Widget* widget) {
   widget->Hide();
 }
 
 views::Widget* NativeWebContentsModalDialogManagerViews::GetWidget(
     gfx::NativeWindow dialog) {
   views::Widget* widget = views::Widget::GetWidgetForNativeWindow(dialog);
   DCHECK(widget);
   return widget;
 }
 
+void NativeWebContentsModalDialogManagerViews::
+    OnNonClippedPositionRequiresUpdate() {
+  DCHECK(host_);
+#if defined(USE_AURA)
+  for (std::set<views::Widget*>::iterator it = observed_widgets_.begin();
+       it != observed_widgets_.end(); ++it) {
+    if (!!((*it)->GetNativeWindowProperty(wm::kAllowTransientParentEventsKey)))
+      constrained_window::UpdateWebContentsModalDialogPosition(*it, host_);
+  }
+#endif
+}
+
 void NativeWebContentsModalDialogManagerViews::WidgetClosing(
     views::Widget* widget) {
 #if defined(USE_AURA)
-  gfx::NativeView view = widget->GetNativeView()->parent();
-  // Allow the parent to animate again.
-  if (view && view->parent())
-    view->parent()->ClearProperty(aura::client::kAnimationsDisabledKey);
+  if (!!widget->GetNativeWindowProperty(wm::kAllowTransientParentEventsKey)) {
+    gfx::NativeWindow parent =
+        wm::GetTransientParent(widget->GetNativeWindow());
+    if (parent && parent->parent())
+      parent->parent()->ClearProperty(aura::client::kAnimationsDisabledKey);
+  } else {
+    gfx::NativeView view = widget->GetNativeView()->parent();
+    // 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);
+  if (host_ && !!widget->GetNativeWindowProperty(
+      wm::kAllowTransientParentEventsKey))
+    wm::RemoveTransientChild(host_->GetHostView(), widget->GetNativeView());
 #endif
 
   // Will cause this object to be deleted.
   native_delegate_->WillClose(widget->GetNativeWindow());
 }
 
+#if defined(USE_AURA)
+void NativeWebContentsModalDialogManagerViews::OnWindowBoundsChanged(
+    aura::Window* window,
+    const gfx::Rect& old_bounds,
+    const gfx::Rect& new_bounds) {
+  if (window != host_->GetHostView())
+    return;
+  OnNonClippedPositionRequiresUpdate();
+}
+
+// Not sure if this is needed or not.
+void NativeWebContentsModalDialogManagerViews::OnWindowRemovingFromRootWindow(
+    aura::Window* window,
+    aura::Window* new_root) {
+  if (window != host_->GetHostView())
+    return;
+  LOG(ERROR) << "Window removing from root window";
+  for (std::set<views::Widget*>::iterator it = observed_widgets_.begin();
+         it != observed_widgets_.end(); ++it) {
+      if (!!((*it)->GetNativeWindowProperty(
+          wm::kAllowTransientParentEventsKey)))
+         aura::client::ParentWindowWithContext((*it)->GetNativeView(),
+    host_->GetHostView()->GetRootWindow(), (*it)->GetNativeView()->bounds());
+  }
+}
+
+void NativeWebContentsModalDialogManagerViews::OnWindowDestroying(
+    aura::Window* window) {
+  window->RemoveObserver(this);
+}
+#endif
 }  // namespace constrained_window