Sets transient for PrintDialogGtk2

chrome/browser/ui/libgtk2ui/print_dialog_gtk2.cc

 // Copyright 2014 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/libgtk2ui/print_dialog_gtk2.h"
 
 #include <gtk/gtkunixprint.h>
 
 #include <string>
 #include <vector>
 
 #include "base/bind.h"
 #include "base/file_util.h"
 #include "base/files/file_util_proxy.h"
 #include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "base/message_loop/message_loop_proxy.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/values.h"
+#include "chrome/browser/ui/libgtk2ui/gtk2_util.h"
 #include "chrome/browser/ui/libgtk2ui/printing_gtk2_util.h"
 #include "printing/metafile.h"
 #include "printing/print_job_constants.h"
 #include "printing/print_settings.h"
+#include "ui/aura/window.h"
 
 using content::BrowserThread;
 using printing::PageRanges;
 using printing::PrintSettings;
 
 namespace {
 
 // CUPS Duplex attribute and values.
 const char kCUPSDuplex[] = "cups-Duplex";
 const char kDuplexNone[] = "None";
@@ skipping 95 matching lines @@
       dialog_(NULL),
       gtk_settings_(NULL),
       page_setup_(NULL),
       printer_(NULL) {
 }
 
 PrintDialogGtk2::~PrintDialogGtk2() {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 
   if (dialog_) {
+    aura::Window* parent = libgtk2ui::GetAuraTransientParent(dialog_);
+    if (parent) {
+      parent->RemoveObserver(this);
+      libgtk2ui::ClearAuraTransientParent(dialog_);
+    }
     gtk_widget_destroy(dialog_);
     dialog_ = NULL;
   }
   if (gtk_settings_) {
     g_object_unref(gtk_settings_);
     gtk_settings_ = NULL;
   }
   if (page_setup_) {
     g_object_unref(page_setup_);
     page_setup_ = NULL;
@@ skipping 78 matching lines @@
 }
 
 void PrintDialogGtk2::ShowDialog(
     gfx::NativeView parent_view,
     bool has_selection,
     const PrintingContextLinux::PrintSettingsCallback& callback) {
   callback_ = callback;
 
   // TODO(mukai): take care of parent as select_file_dialog_impl_gtk2.
   dialog_ = gtk_print_unix_dialog_new(NULL, NULL);
+  libgtk2ui::SetGtkTransientForAura(dialog_, parent_view);
+  parent_view->AddObserver(this);
   g_signal_connect(dialog_, "delete-event",
                    G_CALLBACK(gtk_widget_hide_on_delete), NULL);
 
 
   // Set modal so user cannot focus the same tab and press print again.
   gtk_window_set_modal(GTK_WINDOW(dialog_), TRUE);
 
   // Since we only generate PDF, only show printers that support PDF.
   // TODO(thestig) Add more capabilities to support?
   GtkPrintCapabilities cap = static_cast<GtkPrintCapabilities>(
@@ skipping 178 matching lines @@
       false,
       base::FileUtilProxy::StatusCallback());
   // Printing finished. Matches AddRef() in PrintDocument();
   Release();
 }
 
 void PrintDialogGtk2::InitPrintSettings(PrintSettings* settings) {
   InitPrintSettingsGtk(gtk_settings_, page_setup_, settings);
   context_->InitWithSettings(*settings);
 }
+
+void PrintDialogGtk2::OnWindowDestroying(aura::Window* window) {
+  DCHECK_EQ(libgtk2ui::GetAuraTransientParent(dialog_), window);
+
+  libgtk2ui::ClearAuraTransientParent(dialog_);
+  window->RemoveObserver(this);
+  Release();
+}