[gnome-builder] plugins/sessionui: implement logout inhibition

[Christian Hergert <chergert src gnome org>]

commit fa256aaf0c94d9622a4d299f664fff2d014faa9e
Author: Christian Hergert <chergert redhat com>
Date:   Tue Sep 13 19:10:12 2022 -0700

    plugins/sessionui: implement logout inhibition

 .../sessionui/gbp-sessionui-editor-page-addin.c    | 118 +++++++++++++++++++++
 .../sessionui/gbp-sessionui-editor-page-addin.h    |  31 ++++++
 src/plugins/sessionui/meson.build                  |   1 +
 src/plugins/sessionui/sessionui-plugin.c           |   5 +
 4 files changed, 155 insertions(+)
---
diff --git a/src/plugins/sessionui/gbp-sessionui-editor-page-addin.c 
b/src/plugins/sessionui/gbp-sessionui-editor-page-addin.c
new file mode 100644
index 000000000..add85f0cb
--- /dev/null
+++ b/src/plugins/sessionui/gbp-sessionui-editor-page-addin.c
@@ -0,0 +1,118 @@
+/* gbp-sessionui-editor-page-addin.c
+ *
+ * Copyright 2022 Christian Hergert <chergert redhat com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+#define G_LOG_DOMAIN "gbp-sessionui-editor-page-addin"
+
+#include <libide-code.h>
+#include <libide-editor.h>
+#include <libide-gui.h>
+
+#include "gbp-sessionui-editor-page-addin.h"
+
+struct _GbpSessionuiEditorPageAddin
+{
+  GObject        parent_instance;
+  IdeEditorPage *page;
+  IdeBuffer     *buffer;
+  gulong         modified_changed_handler;
+  guint          logout_inhibited : 1;
+};
+
+static void
+gbp_sessionui_editor_page_addin_modified_changed_cb (GbpSessionuiEditorPageAddin *self,
+                                                     IdeBuffer                   *buffer)
+{
+  gboolean inhibit_logout;
+
+  g_assert (IDE_IS_MAIN_THREAD ());
+  g_assert (GBP_IS_SESSIONUI_EDITOR_PAGE_ADDIN (self));
+  g_assert (IDE_IS_BUFFER (buffer));
+
+  inhibit_logout = gtk_text_buffer_get_modified (GTK_TEXT_BUFFER (buffer));
+
+  if (inhibit_logout != self->logout_inhibited)
+    {
+      IdeWorkspace *workspace = ide_widget_get_workspace (GTK_WIDGET (self->page));
+
+      if (inhibit_logout)
+        ide_workspace_inhibit_logout (workspace);
+      else
+        ide_workspace_uninhibit_logout (workspace);
+
+      self->logout_inhibited = inhibit_logout;
+    }
+}
+
+static void
+gbp_sessionui_editor_page_addin_load (IdeEditorPageAddin *addin,
+                                      IdeEditorPage      *page)
+{
+  GbpSessionuiEditorPageAddin *self = (GbpSessionuiEditorPageAddin *)addin;
+  IdeBuffer *buffer;
+
+  g_assert (GBP_IS_SESSIONUI_EDITOR_PAGE_ADDIN (self));
+  g_assert (IDE_IS_EDITOR_PAGE (page));
+
+  buffer = ide_editor_page_get_buffer (page);
+
+  self->page = page;
+  self->buffer = g_object_ref (buffer);
+  self->modified_changed_handler =
+    g_signal_connect_object (self->buffer,
+                             "modified-changed",
+                             G_CALLBACK (gbp_sessionui_editor_page_addin_modified_changed_cb),
+                             self,
+                             G_CONNECT_SWAPPED);
+  gbp_sessionui_editor_page_addin_modified_changed_cb (self, self->buffer);
+}
+
+static void
+gbp_sessionui_editor_page_addin_unload (IdeEditorPageAddin *addin,
+                                        IdeEditorPage      *page)
+{
+  GbpSessionuiEditorPageAddin *self = (GbpSessionuiEditorPageAddin *)addin;
+
+  g_assert (GBP_IS_SESSIONUI_EDITOR_PAGE_ADDIN (self));
+  g_assert (IDE_IS_EDITOR_PAGE (page));
+
+  g_clear_signal_handler (&self->modified_changed_handler, self->buffer);
+  g_clear_object (&self->buffer);
+  self->page = NULL;
+}
+
+static void
+editor_page_addin_iface_init (IdeEditorPageAddinInterface *iface)
+{
+  iface->load = gbp_sessionui_editor_page_addin_load;
+  iface->unload = gbp_sessionui_editor_page_addin_unload;
+}
+
+G_DEFINE_FINAL_TYPE_WITH_CODE (GbpSessionuiEditorPageAddin, gbp_sessionui_editor_page_addin, G_TYPE_OBJECT,
+                               G_IMPLEMENT_INTERFACE (IDE_TYPE_EDITOR_PAGE_ADDIN, 
editor_page_addin_iface_init))
+
+static void
+gbp_sessionui_editor_page_addin_class_init (GbpSessionuiEditorPageAddinClass *klass)
+{
+}
+
+static void
+gbp_sessionui_editor_page_addin_init (GbpSessionuiEditorPageAddin *self)
+{
+}
diff --git a/src/plugins/sessionui/gbp-sessionui-editor-page-addin.h 
b/src/plugins/sessionui/gbp-sessionui-editor-page-addin.h
new file mode 100644
index 000000000..70b819b0d
--- /dev/null
+++ b/src/plugins/sessionui/gbp-sessionui-editor-page-addin.h
@@ -0,0 +1,31 @@
+/* gbp-sessionui-editor-page-addin.h
+ *
+ * Copyright 2022 Christian Hergert <chergert redhat com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+#pragma once
+
+#include <glib-object.h>
+
+G_BEGIN_DECLS
+
+#define GBP_TYPE_SESSIONUI_EDITOR_PAGE_ADDIN (gbp_sessionui_editor_page_addin_get_type())
+
+G_DECLARE_FINAL_TYPE (GbpSessionuiEditorPageAddin, gbp_sessionui_editor_page_addin, GBP, 
SESSIONUI_EDITOR_PAGE_ADDIN, GObject)
+
+G_END_DECLS
diff --git a/src/plugins/sessionui/meson.build b/src/plugins/sessionui/meson.build
index 3a1eefeef..ebbde73cb 100644
--- a/src/plugins/sessionui/meson.build
+++ b/src/plugins/sessionui/meson.build
@@ -1,5 +1,6 @@
 plugins_sources += files([
   'sessionui-plugin.c',
+  'gbp-sessionui-editor-page-addin.c',
   'gbp-sessionui-workbench-addin.c',
 ])
 
diff --git a/src/plugins/sessionui/sessionui-plugin.c b/src/plugins/sessionui/sessionui-plugin.c
index 2c6c20998..92a075db5 100644
--- a/src/plugins/sessionui/sessionui-plugin.c
+++ b/src/plugins/sessionui/sessionui-plugin.c
@@ -24,13 +24,18 @@
 
 #include <libpeas/peas.h>
 
+#include <libide-editor.h>
 #include <libide-gui.h>
 
+#include "gbp-sessionui-editor-page-addin.h"
 #include "gbp-sessionui-workbench-addin.h"
 
 _IDE_EXTERN void
 _gbp_sessionui_register_types (PeasObjectModule *module)
 {
+  peas_object_module_register_extension_type (module,
+                                              IDE_TYPE_EDITOR_PAGE_ADDIN,
+                                              GBP_TYPE_SESSIONUI_EDITOR_PAGE_ADDIN);
   peas_object_module_register_extension_type (module,
                                               IDE_TYPE_WORKBENCH_ADDIN,
                                               GBP_TYPE_SESSIONUI_WORKBENCH_ADDIN);