[gnome-builder] ls: Add session saving support

[Christian Hergert <chergert src gnome org>]

commit b278d4cfd5c1708198ae4519c222863b6cd6cb8b
Author: vanadiae <vanadiae35 gmail com>
Date:   Sun Aug 1 19:45:55 2021 +0200

    ls: Add session saving support

 src/plugins/ls/gbp-ls-session-addin.c | 166 ++++++++++++++++++++++++++++++++++
 src/plugins/ls/gbp-ls-session-addin.h |  32 +++++++
 src/plugins/ls/ls-plugin.c            |   4 +
 src/plugins/ls/meson.build            |   1 +
 4 files changed, 203 insertions(+)
---
diff --git a/src/plugins/ls/gbp-ls-session-addin.c b/src/plugins/ls/gbp-ls-session-addin.c
new file mode 100644
index 000000000..d66b78c30
--- /dev/null
+++ b/src/plugins/ls/gbp-ls-session-addin.c
@@ -0,0 +1,166 @@
+/* gbp-ls-session-addin.c
+ *
+ * Copyright 2021 vanadiae <vanadiae35 gmail 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-ls-session-addin"
+
+#include "config.h"
+
+#include <libide-threading.h>
+
+#include "gbp-ls-session-addin.h"
+
+#include "gbp-ls-page.h"
+
+struct _GbpLsSessionAddin
+{
+  IdeObject parent_instance;
+};
+
+static void
+gbp_ls_session_addin_save_page_async (IdeSessionAddin     *addin,
+                                      IdePage             *page,
+                                      GCancellable        *cancellable,
+                                      GAsyncReadyCallback  callback,
+                                      gpointer             user_data)
+{
+  g_autoptr(IdeTask) task = NULL;
+  GVariantDict state_dict;
+  GFile *directory;
+
+  IDE_ENTRY;
+
+  g_assert (IDE_IS_MAIN_THREAD ());
+  g_assert (GBP_IS_LS_SESSION_ADDIN (addin));
+  g_assert (GBP_IS_LS_PAGE (page));
+  g_assert (!cancellable || G_IS_CANCELLABLE (cancellable));
+
+  task = ide_task_new (addin, cancellable, callback, user_data);
+  ide_task_set_source_tag (task, gbp_ls_session_addin_save_page_async);
+
+  directory = gbp_ls_page_get_directory (GBP_LS_PAGE (page));
+  g_variant_dict_init (&state_dict, NULL);
+  g_variant_dict_insert (&state_dict, "directory", "s", directory ? g_file_peek_path (directory) : "");
+
+  IDE_TRACE_MSG ("Saving ls page with directory \"%s\"", g_file_peek_path (directory));
+
+  ide_task_return_pointer (task, g_variant_take_ref (g_variant_dict_end (&state_dict)), g_variant_unref);
+
+  IDE_EXIT;
+}
+
+static GVariant *
+gbp_ls_session_addin_save_page_finish (IdeSessionAddin  *self,
+                                       GAsyncResult     *result,
+                                       GError          **error)
+{
+  g_assert (GBP_IS_LS_SESSION_ADDIN (self));
+  g_assert (IDE_IS_TASK (result));
+
+  return ide_task_propagate_pointer (IDE_TASK (result), error);
+}
+
+static void
+gbp_ls_session_addin_restore_page_async (IdeSessionAddin     *addin,
+                                         GVariant            *state,
+                                         GCancellable        *cancellable,
+                                         GAsyncReadyCallback  callback,
+                                         gpointer             user_data)
+{
+  g_autoptr(IdeTask) task = NULL;
+  GVariantDict state_dict;
+  const char *directory_path;
+  g_autoptr(GFile) directory = NULL;
+
+  g_assert (GBP_IS_LS_SESSION_ADDIN (addin));
+  g_assert (!cancellable || G_IS_CANCELLABLE (cancellable));
+  g_assert (g_variant_is_of_type (state, G_VARIANT_TYPE_VARDICT));
+
+  task = ide_task_new (addin, cancellable, callback, user_data);
+  ide_task_set_source_tag (task, gbp_ls_session_addin_restore_page_async);
+
+  g_variant_dict_init (&state_dict, state);
+  g_variant_dict_lookup (&state_dict, "directory", "&s", &directory_path);
+  g_assert (directory_path != NULL);
+
+  IDE_TRACE_MSG ("Restoring ls page at directory \"%s\"", directory_path);
+
+  directory = g_file_new_for_path (directory_path);
+  ide_task_return_pointer (task,
+                           g_object_new (GBP_TYPE_LS_PAGE,
+                                         "directory", directory,
+                                         "visible", TRUE,
+                                         NULL),
+                           g_object_unref);
+}
+
+static IdePage *
+gbp_ls_session_addin_restore_page_finish (IdeSessionAddin  *self,
+                                          GAsyncResult     *result,
+                                          GError          **error)
+{
+  g_assert (GBP_IS_LS_SESSION_ADDIN (self));
+  g_assert (IDE_IS_TASK (result));
+
+  return ide_task_propagate_pointer (IDE_TASK (result), error);
+}
+
+static gboolean
+gbp_ls_session_addin_can_save_page (IdeSessionAddin *addin,
+                                    IdePage         *page)
+{
+  return GBP_IS_LS_PAGE (page);
+}
+
+static char **
+gbp_ls_session_addin_get_autosave_properties (IdeSessionAddin *addin)
+{
+  GStrvBuilder *builder = NULL;
+
+  g_assert (GBP_IS_LS_SESSION_ADDIN (addin));
+
+  builder = g_strv_builder_new ();
+  g_strv_builder_add (builder, "directory");
+  return g_strv_builder_end (builder);
+}
+
+static void
+session_addin_iface_init (IdeSessionAddinInterface *iface)
+{
+  iface->save_page_async = gbp_ls_session_addin_save_page_async;
+  iface->save_page_finish = gbp_ls_session_addin_save_page_finish;
+  iface->restore_page_async = gbp_ls_session_addin_restore_page_async;
+  iface->restore_page_finish = gbp_ls_session_addin_restore_page_finish;
+  iface->can_save_page = gbp_ls_session_addin_can_save_page;
+  iface->get_autosave_properties = gbp_ls_session_addin_get_autosave_properties;
+}
+
+G_DEFINE_TYPE_WITH_CODE (GbpLsSessionAddin, gbp_ls_session_addin, IDE_TYPE_OBJECT,
+                         G_IMPLEMENT_INTERFACE (IDE_TYPE_SESSION_ADDIN, session_addin_iface_init))
+
+static void
+gbp_ls_session_addin_class_init (GbpLsSessionAddinClass *klass)
+{
+}
+
+static void
+gbp_ls_session_addin_init (GbpLsSessionAddin *self)
+{
+}
diff --git a/src/plugins/ls/gbp-ls-session-addin.h b/src/plugins/ls/gbp-ls-session-addin.h
new file mode 100644
index 000000000..0dfb0ad77
--- /dev/null
+++ b/src/plugins/ls/gbp-ls-session-addin.h
@@ -0,0 +1,32 @@
+/* gbp-ls-session-addin.h
+ *
+ * Copyright 2021 vanadiae <vanadiae35 gmail 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 <ide-object.h>
+
+G_BEGIN_DECLS
+
+#define GBP_TYPE_LS_SESSION_ADDIN (gbp_ls_session_addin_get_type())
+
+G_DECLARE_FINAL_TYPE (GbpLsSessionAddin, gbp_ls_session_addin, GBP, LS_SESSION_ADDIN, IdeObject)
+
+G_END_DECLS
diff --git a/src/plugins/ls/ls-plugin.c b/src/plugins/ls/ls-plugin.c
index 1117ed0ba..d7fa4c538 100644
--- a/src/plugins/ls/ls-plugin.c
+++ b/src/plugins/ls/ls-plugin.c
@@ -25,6 +25,7 @@
 #include <libide-gui.h>
 
 #include "gbp-ls-editor-page-addin.h"
+#include "gbp-ls-session-addin.h"
 #include "gbp-ls-workbench-addin.h"
 
 _IDE_EXTERN void
@@ -33,6 +34,9 @@ _gbp_ls_register_types (PeasObjectModule *module)
   peas_object_module_register_extension_type (module,
                                               IDE_TYPE_EDITOR_PAGE_ADDIN,
                                               GBP_TYPE_LS_EDITOR_PAGE_ADDIN);
+  peas_object_module_register_extension_type (module,
+                                              IDE_TYPE_SESSION_ADDIN,
+                                              GBP_TYPE_LS_SESSION_ADDIN);
   peas_object_module_register_extension_type (module,
                                               IDE_TYPE_WORKBENCH_ADDIN,
                                               GBP_TYPE_LS_WORKBENCH_ADDIN);
diff --git a/src/plugins/ls/meson.build b/src/plugins/ls/meson.build
index e74df7ebe..d3be22e4a 100644
--- a/src/plugins/ls/meson.build
+++ b/src/plugins/ls/meson.build
@@ -2,6 +2,7 @@ plugins_sources += files([
   'gbp-ls-model.c',
   'gbp-ls-page.c',
   'gbp-ls-editor-page-addin.c',
+  'gbp-ls-session-addin.c',
   'gbp-ls-workbench-addin.c',
   'gbp-ls-tree-view.c',
   'ls-plugin.c',