clapper-app: Add enhancers to preferences window

Browse, read info and configure Clapper enhancer plugins from preferences window

src/bin/clapper-app/clapper-app-file-dialog.c

@@ -72,6 +72,43 @@ _open_subtitles_cb (GtkFileDialog *dialog, GAsyncResult *result, ClapperMediaIte
   gst_object_unref (item); // Borrowed reference
 }
 
+static void
+_on_select_file_dir_finish (GFile *file, AdwActionRow *action_row, GError *error)
+{
+  if (G_LIKELY (error == NULL)) {
+    gchar *path = g_file_get_path (file);
+
+    adw_action_row_set_subtitle (action_row, path);
+    g_free (path);
+  } else {
+    if (error->domain != GTK_DIALOG_ERROR || error->code != GTK_DIALOG_ERROR_DISMISSED) {
+      g_printerr ("Error: %s\n",
+          (error->message) ? error->message : "Could not open file dialog");
+    }
+    g_error_free (error);
+  }
+  g_clear_object (&file);
+  g_object_unref (action_row); // Borrowed reference
+}
+
+static void
+_select_file_cb (GtkFileDialog *dialog, GAsyncResult *result, AdwActionRow *action_row)
+{
+  GError *error = NULL;
+  GFile *file = gtk_file_dialog_open_finish (dialog, result, &error);
+
+  _on_select_file_dir_finish (file, action_row, error);
+}
+
+static void
+_select_dir_cb (GtkFileDialog *dialog, GAsyncResult *result, AdwActionRow *action_row)
+{
+  GError *error = NULL;
+  GFile *file = gtk_file_dialog_select_folder_finish (dialog, result, &error);
+
+  _on_select_file_dir_finish (file, action_row, error);
+}
+
 static void
 _dialog_add_mime_types (GtkFileDialog *dialog, const gchar *filter_name,
     const gchar *const *mime_types)
@@ -144,3 +181,35 @@ clapper_app_file_dialog_open_subtitles (GtkApplication *gtk_app, ClapperMediaIte
 
   g_object_unref (dialog);
 }
+
+void
+clapper_app_file_dialog_select_prefs_file (GtkApplication *gtk_app, AdwActionRow *action_row)
+{
+  GtkWindow *window = gtk_application_get_active_window (gtk_app);
+  GtkFileDialog *dialog = gtk_file_dialog_new ();
+
+  gtk_file_dialog_set_modal (dialog, TRUE);
+  gtk_file_dialog_set_title (dialog, "Select File");
+
+  gtk_file_dialog_open (dialog, window, NULL,
+      (GAsyncReadyCallback) _select_file_cb,
+      g_object_ref (action_row));
+
+  g_object_unref (dialog);
+}
+
+void
+clapper_app_file_dialog_select_prefs_dir (GtkApplication *gtk_app, AdwActionRow *action_row)
+{
+  GtkWindow *window = gtk_application_get_active_window (gtk_app);
+  GtkFileDialog *dialog = gtk_file_dialog_new ();
+
+  gtk_file_dialog_set_modal (dialog, TRUE);
+  gtk_file_dialog_set_title (dialog, "Select Folder");
+
+  gtk_file_dialog_select_folder (dialog, window, NULL,
+      (GAsyncReadyCallback) _select_dir_cb,
+      g_object_ref (action_row));
+
+  g_object_unref (dialog);
+}

src/bin/clapper-app/clapper-app-file-dialog.h

@@ -19,6 +19,7 @@
 
 #include <glib.h>
 #include <gtk/gtk.h>
+#include <adwaita.h>
 #include <clapper/clapper.h>
 
 G_BEGIN_DECLS
@@ -29,4 +30,10 @@ void clapper_app_file_dialog_open_files (GtkApplication *gtk_app);
 G_GNUC_INTERNAL
 void clapper_app_file_dialog_open_subtitles (GtkApplication *gtk_app, ClapperMediaItem *item);
 
+G_GNUC_INTERNAL
+void clapper_app_file_dialog_select_prefs_file (GtkApplication *gtk_app, AdwActionRow *action_row);
+
+G_GNUC_INTERNAL
+void clapper_app_file_dialog_select_prefs_dir (GtkApplication *gtk_app, AdwActionRow *action_row);
+
 G_END_DECLS

src/bin/clapper-app/clapper-app-preferences-window.c

@@ -23,6 +23,7 @@
 
 #include "clapper-app-preferences-window.h"
 #include "clapper-app-application.h"
+#include "clapper-app-file-dialog.h"
 #include "clapper-app-utils.h"
 
 #define GST_CAT_DEFAULT clapper_app_preferences_window_debug
@@ -41,6 +42,14 @@ struct _ClapperAppPreferencesWindow
   AdwSpinRow *subtitle_offset_spin_row;
   GtkFontDialogButton *font_dialog_button;
 
+  GtkStack *enhancers_stack;
+  GtkWidget *browse_enhancers_page;
+  GtkWidget *no_enhancers_page;
+
+  AdwNavigationPage *enhancers_subpage;
+  AdwComboRow *enhancers_combo_row;
+  AdwPreferencesGroup *enhancer_config_group;
+
   AdwNavigationPage *plugins_subpage;
   AdwComboRow *plugins_combo_row;
   AdwComboRow *features_combo_row;
@@ -48,6 +57,8 @@ struct _ClapperAppPreferencesWindow
 
   GSettings *settings;
 
+  GList *enhancer_pspec_rows;
+
   GList *features;
   GtkStringList *plugins_list;
 
@@ -67,6 +78,19 @@ typedef struct
   gboolean updated;
 } ClapperAppPreferencesIterRanksData;
 
+typedef struct
+{
+  GSettings *settings;
+  const gchar *key;
+} ClapperAppPreferencesResetData;
+
+typedef struct
+{
+  GSettings *settings;
+  GParamSpec *pspec;
+  guint flag;
+} ClapperAppPreferencesFlagMapData;
+
 enum
 {
   PROP_0,
@@ -76,6 +100,347 @@ enum
 
 static GParamSpec *param_specs[PROP_LAST] = { NULL, };
 
+static void
+_flag_map_data_free (ClapperAppPreferencesFlagMapData *data)
+{
+  GST_TRACE ("Destroying flag map data: %p", data);
+  g_object_unref (data->settings);
+  g_free (data);
+}
+
+static void
+_reset_button_closure (ClapperAppPreferencesResetData *data, GClosure *closure)
+{
+  GST_TRACE ("Destroying reset button data: %p", data);
+  g_object_unref (data->settings);
+  g_free (data);
+}
+
+static void
+_reset_button_clicked_cb (GtkButton *button, ClapperAppPreferencesResetData *data)
+{
+  g_settings_reset (data->settings, data->key);
+}
+
+static void
+file_selection_row_activated_cb (AdwActionRow *action_row, GParamSpec *pspec)
+{
+  GtkApplication *gtk_app;
+  GtkWidget *window;
+
+  if (!(window = gtk_widget_get_ancestor (GTK_WIDGET (action_row), GTK_TYPE_WINDOW))) {
+    GST_ERROR ("Could not get a hold of parent window");
+    return;
+  }
+
+  gtk_app = gtk_window_get_application (GTK_WINDOW (window));
+
+  if (pspec->flags & CLAPPER_ENHANCER_PARAM_FILEPATH)
+    clapper_app_file_dialog_select_prefs_file (gtk_app, action_row);
+  else
+    clapper_app_file_dialog_select_prefs_dir (gtk_app, action_row);
+}
+
+static gboolean
+_get_enum_mapping (GValue *value, GVariant *variant, GParamSpec *pspec)
+{
+  GEnumClass *enum_class = G_ENUM_CLASS (g_type_class_peek (pspec->value_type));
+  const gchar *selected_str = g_variant_get_string (variant, NULL);
+  guint i, selected = 0;
+
+  for (i = 0; i < enum_class->n_values; ++i) {
+    if (g_strcmp0 (selected_str, enum_class->values[i].value_nick) == 0) {
+      selected = i;
+      break;
+    }
+  }
+
+  g_value_set_uint (value, selected);
+  return TRUE;
+}
+
+static GVariant *
+_set_enum_mapping (GValue *value, GVariantType *exp_type, GParamSpec *pspec)
+{
+  GEnumClass *enum_class = G_ENUM_CLASS (g_type_class_peek (pspec->value_type));
+  guint selected = g_value_get_uint (value);
+
+  if (G_UNLIKELY (selected == GTK_INVALID_LIST_POSITION))
+    selected = 0;
+
+  return g_variant_new_string (enum_class->values[selected].value_nick);
+}
+
+static gboolean
+_get_flag_mapping (GValue *value, GVariant *variant, ClapperAppPreferencesFlagMapData *data)
+{
+  guint flags = g_settings_get_flags (data->settings, data->pspec->name);
+
+  g_value_set_boolean (value, (flags & data->flag));
+  return TRUE;
+}
+
+static GVariant *
+_set_flag_mapping (GValue *value, GVariantType *exp_type, ClapperAppPreferencesFlagMapData *data)
+{
+  GFlagsClass *flags_class = G_FLAGS_CLASS (g_type_class_peek (data->pspec->value_type));
+  GStrvBuilder *builder;
+  GVariant *variant;
+  gchar **strv;
+  gboolean active = g_value_get_boolean (value);
+  guint i, flags = g_settings_get_flags (data->settings, data->pspec->name);
+
+  if (active)
+    flags |= data->flag;
+  else
+    flags &= ~(data->flag);
+
+  builder = g_strv_builder_new ();
+
+  for (i = 0; i < flags_class->n_values; ++i) {
+    if (flags & flags_class->values[i].value)
+      g_strv_builder_add (builder, flags_class->values[i].value_nick);
+  }
+
+  strv = g_strv_builder_end (builder);
+  g_strv_builder_unref (builder);
+
+  variant = g_variant_new_strv ((const gchar *const *) strv, -1);
+  g_strfreev (strv);
+
+  return variant;
+}
+
+static gboolean
+_add_enhancer_config_row (ClapperAppPreferencesWindow *self, GParamSpec *pspec,
+    GSettings *enhancer_settings)
+{
+  GtkWidget *row = NULL, *reset_button;
+  ClapperAppPreferencesResetData *reset_data;
+  const gchar *bind_prop = NULL;
+  gboolean is_enum = FALSE, is_flags = FALSE;
+
+  switch (pspec->value_type) {
+    case G_TYPE_BOOLEAN:{
+      row = adw_switch_row_new ();
+      break;
+    }
+    case G_TYPE_INT:{
+      GParamSpecInt *p = (GParamSpecInt *) pspec;
+      row = adw_spin_row_new_with_range (p->minimum, p->maximum, 1);
+      break;
+    }
+    case G_TYPE_UINT:{
+      GParamSpecUInt *p = (GParamSpecUInt *) pspec;
+      row = adw_spin_row_new_with_range (p->minimum, p->maximum, 1);
+      break;
+    }
+    case G_TYPE_DOUBLE:{
+      GParamSpecDouble *p = (GParamSpecDouble *) pspec;
+      row = adw_spin_row_new_with_range (p->minimum, p->maximum, 0.25);
+      break;
+    }
+    case G_TYPE_STRING:{
+      if (pspec->flags & (CLAPPER_ENHANCER_PARAM_FILEPATH | CLAPPER_ENHANCER_PARAM_DIRPATH)) {
+        GtkWidget *image;
+
+        image = gtk_image_new_from_icon_name ("document-open-symbolic");
+        gtk_widget_set_margin_end (image, 10); // matches other rows
+
+        row = adw_action_row_new ();
+        adw_action_row_add_suffix (ADW_ACTION_ROW (row), image);
+        adw_action_row_set_activatable_widget (ADW_ACTION_ROW (row), image);
+
+        g_signal_connect (row, "activated",
+            G_CALLBACK (file_selection_row_activated_cb), pspec);
+      } else {
+        row = adw_entry_row_new ();
+      }
+      break;
+    }
+    default:{
+      if ((is_enum = G_IS_PARAM_SPEC_ENUM (pspec))) {
+        GtkExpression *expression;
+        AdwEnumListModel *enum_model;
+
+        row = adw_combo_row_new ();
+        expression = gtk_property_expression_new (ADW_TYPE_ENUM_LIST_ITEM, NULL, "nick");
+        adw_combo_row_set_expression (ADW_COMBO_ROW (row), expression);
+
+        enum_model = adw_enum_list_model_new (pspec->value_type);
+        adw_combo_row_set_model (ADW_COMBO_ROW (row), G_LIST_MODEL (enum_model));
+
+        gtk_expression_unref (expression);
+        g_object_unref (enum_model);
+        break;
+      } else if ((is_flags = G_IS_PARAM_SPEC_FLAGS (pspec))) {
+        GFlagsClass *flags_class = G_FLAGS_CLASS (g_type_class_peek (pspec->value_type));
+        guint i;
+
+        row = adw_expander_row_new ();
+
+        for (i = 0; i < flags_class->n_values; ++i) {
+          GtkWidget *flag_row = adw_switch_row_new ();
+          ClapperAppPreferencesFlagMapData *fm_data;
+
+          adw_preferences_row_set_title (ADW_PREFERENCES_ROW (flag_row),
+              flags_class->values[i].value_nick);
+
+          fm_data = g_new (ClapperAppPreferencesFlagMapData, 1);
+          fm_data->settings = g_object_ref (enhancer_settings);
+          fm_data->pspec = pspec;
+          fm_data->flag = flags_class->values[i].value;
+
+          GST_TRACE ("Created flag map data: %p", fm_data);
+
+          g_settings_bind_with_mapping (enhancer_settings, pspec->name, flag_row,
+              "active", G_SETTINGS_BIND_DEFAULT,
+              (GSettingsBindGetMapping) _get_flag_mapping,
+              (GSettingsBindSetMapping) _set_flag_mapping,
+              fm_data, (GDestroyNotify) _flag_map_data_free);
+
+          adw_expander_row_add_row (ADW_EXPANDER_ROW (row), flag_row);
+        }
+        break;
+      }
+      g_warning ("Unsupported enhancer \"%s\" property type: %s",
+          pspec->name, g_type_name (pspec->value_type));
+      return FALSE;
+    }
+  }
+
+  reset_button = gtk_button_new_from_icon_name ("view-refresh-symbolic");
+  gtk_widget_set_tooltip_text (reset_button, _("Restore default"));
+
+  gtk_widget_set_halign (reset_button, GTK_ALIGN_CENTER);
+  gtk_widget_set_valign (reset_button, GTK_ALIGN_CENTER);
+  gtk_widget_add_css_class (reset_button, "circular");
+
+  gtk_widget_set_tooltip_text (row, g_param_spec_get_blurb (pspec));
+
+  adw_preferences_row_set_title (ADW_PREFERENCES_ROW (row), g_param_spec_get_nick (pspec));
+
+  if (ADW_IS_SWITCH_ROW (row)) {
+    bind_prop = "active";
+  } else if (ADW_IS_SPIN_ROW (row)) {
+    bind_prop = "value";
+    adw_spin_row_set_numeric (ADW_SPIN_ROW (row), TRUE);
+  } else if (ADW_IS_ENTRY_ROW (row)) {
+    bind_prop = "text";
+  } else if (ADW_IS_COMBO_ROW (row)) {
+    bind_prop = "selected";
+  } else if (ADW_IS_ACTION_ROW (row)) {
+    bind_prop = "subtitle";
+  } else if (!is_flags) { // In case of flags we bind individual widgets
+    g_assert_not_reached ();
+    return FALSE;
+  }
+
+  if (ADW_IS_ENTRY_ROW (row))
+    adw_entry_row_add_prefix (ADW_ENTRY_ROW (row), reset_button);
+  else if (ADW_IS_ACTION_ROW (row))
+    adw_action_row_add_prefix (ADW_ACTION_ROW (row), reset_button);
+  else if (ADW_IS_EXPANDER_ROW (row))
+    adw_expander_row_add_prefix (ADW_EXPANDER_ROW (row), reset_button);
+
+  if (is_enum) {
+    g_settings_bind_with_mapping (enhancer_settings, pspec->name, row,
+        bind_prop, G_SETTINGS_BIND_DEFAULT,
+        (GSettingsBindGetMapping) _get_enum_mapping,
+        (GSettingsBindSetMapping) _set_enum_mapping,
+        pspec, NULL);
+  } else if (!is_flags) {
+    g_settings_bind (enhancer_settings, pspec->name, row,
+        bind_prop, G_SETTINGS_BIND_DEFAULT);
+  }
+
+  reset_data = g_new (ClapperAppPreferencesResetData, 1);
+  reset_data->settings = g_object_ref (enhancer_settings);
+  reset_data->key = pspec->name;
+
+  GST_TRACE ("Created reset button data: %p", reset_data);
+
+  g_signal_connect_data (reset_button, "clicked",
+      G_CALLBACK (_reset_button_clicked_cb), reset_data,
+      (GClosureNotify) _reset_button_closure, G_CONNECT_DEFAULT);
+
+  adw_preferences_group_add (self->enhancer_config_group, row);
+  self->enhancer_pspec_rows = g_list_append (self->enhancer_pspec_rows, row);
+
+  return TRUE;
+}
+
+static void
+selected_enhancer_changed_cb (AdwComboRow *combo_row,
+    GParamSpec *pspec G_GNUC_UNUSED, ClapperAppPreferencesWindow *self)
+{
+  guint selected = adw_combo_row_get_selected (combo_row);
+
+  /* Remove old rows */
+  if (self->enhancer_pspec_rows) {
+    GList *el;
+
+    for (el = self->enhancer_pspec_rows; el; el = g_list_next (el))
+      adw_preferences_group_remove (self->enhancer_config_group, GTK_WIDGET (el->data));
+
+    g_clear_list (&self->enhancer_pspec_rows, NULL);
+  }
+
+  /* Add new rows */
+  if (selected != GTK_INVALID_LIST_POSITION) {
+    ClapperEnhancerProxyList *proxies = clapper_get_global_enhancer_proxies ();
+    ClapperEnhancerProxy *proxy = clapper_enhancer_proxy_list_peek_proxy (proxies, selected);
+    GParamSpec **pspecs;
+    guint n_pspecs;
+    gboolean has_props = FALSE;
+
+    if ((pspecs = clapper_enhancer_proxy_get_target_properties (proxy, &n_pspecs))) {
+      GSettings *enhancer_settings = NULL;
+      guint i;
+
+      for (i = 0; i < n_pspecs; ++i) {
+        if (pspecs[i]->flags & CLAPPER_ENHANCER_PARAM_GLOBAL) {
+          if (!enhancer_settings)
+            enhancer_settings = clapper_enhancer_proxy_get_settings (proxy);
+          if (enhancer_settings)
+            has_props |= _add_enhancer_config_row (self, pspecs[i], enhancer_settings);
+        }
+      }
+
+      g_clear_object (&enhancer_settings);
+    }
+
+    if (!has_props) {
+      GtkWidget *row = adw_action_row_new ();
+
+      adw_preferences_row_set_title (ADW_PREFERENCES_ROW (row), _("No configurable properties"));
+      adw_preferences_group_add (self->enhancer_config_group, row);
+      self->enhancer_pspec_rows = g_list_append (self->enhancer_pspec_rows, row);
+    }
+  }
+}
+
+static void
+enhancers_config_activated_cb (AdwActionRow *action_row, ClapperAppPreferencesWindow *self)
+{
+  /* If no model set yet */
+  if (!adw_combo_row_get_model (self->enhancers_combo_row)) {
+    ClapperEnhancerProxyList *proxies = clapper_get_global_enhancer_proxies ();
+
+    adw_combo_row_set_model (self->enhancers_combo_row, G_LIST_MODEL (proxies));
+    adw_combo_row_set_selected (self->enhancers_combo_row, GTK_INVALID_LIST_POSITION);
+
+    GST_DEBUG ("Populated names combo row in enhancers subpage");
+
+    if (clapper_enhancer_proxy_list_get_n_proxies (proxies) > 0)
+      gtk_stack_set_visible_child (self->enhancers_stack, self->browse_enhancers_page);
+    else
+      gtk_stack_set_visible_child (self->enhancers_stack, self->no_enhancers_page);
+  }
+
+  adw_preferences_window_push_subpage (ADW_PREFERENCES_WINDOW (self), self->enhancers_subpage);
+}
+
 /* Sort by plugin name and if the same, sort by element name */
 static gint
 _compare_plugins_cb (gconstpointer ptr_a, gconstpointer ptr_b)
@@ -301,6 +666,12 @@ _make_plugin_features_string_list (ClapperAppPreferencesWindow *self, const gcha
   return features_list;
 }
 
+static gboolean
+list_has_selection_closure (ClapperAppPreferencesWindow *self, guint selected)
+{
+  return (selected != GTK_INVALID_LIST_POSITION);
+}
+
 static GtkStringList *
 ranking_features_model_closure (ClapperAppPreferencesWindow *self, GtkStringObject *string_obj)
 {
@@ -543,6 +914,7 @@ clapper_app_preferences_window_finalize (GObject *object)
 
   g_object_unref (self->settings);
 
+  g_clear_list (&self->enhancer_pspec_rows, NULL);
   g_clear_object (&self->plugins_list);
 
   if (self->features)
@@ -598,6 +970,14 @@ clapper_app_preferences_window_class_init (ClapperAppPreferencesWindowClass *kla
   gtk_widget_class_bind_template_child (widget_class, ClapperAppPreferencesWindow, subtitle_offset_spin_row);
   gtk_widget_class_bind_template_child (widget_class, ClapperAppPreferencesWindow, font_dialog_button);
 
+  gtk_widget_class_bind_template_child (widget_class, ClapperAppPreferencesWindow, enhancers_stack);
+  gtk_widget_class_bind_template_child (widget_class, ClapperAppPreferencesWindow, browse_enhancers_page);
+  gtk_widget_class_bind_template_child (widget_class, ClapperAppPreferencesWindow, no_enhancers_page);
+
+  gtk_widget_class_bind_template_child (widget_class, ClapperAppPreferencesWindow, enhancers_subpage);
+  gtk_widget_class_bind_template_child (widget_class, ClapperAppPreferencesWindow, enhancers_combo_row);
+  gtk_widget_class_bind_template_child (widget_class, ClapperAppPreferencesWindow, enhancer_config_group);
+
   gtk_widget_class_bind_template_child (widget_class, ClapperAppPreferencesWindow, plugins_subpage);
   gtk_widget_class_bind_template_child (widget_class, ClapperAppPreferencesWindow, plugins_combo_row);
   gtk_widget_class_bind_template_child (widget_class, ClapperAppPreferencesWindow, features_combo_row);
@@ -605,9 +985,13 @@ clapper_app_preferences_window_class_init (ClapperAppPreferencesWindowClass *kla
 
   gtk_widget_class_bind_template_callback (widget_class, seek_method_name_closure);
 
+  gtk_widget_class_bind_template_callback (widget_class, enhancers_config_activated_cb);
+  gtk_widget_class_bind_template_callback (widget_class, selected_enhancer_changed_cb);
+
   gtk_widget_class_bind_template_callback (widget_class, plugin_ranking_activated_cb);
   gtk_widget_class_bind_template_callback (widget_class, plugin_ranking_unrealize_cb);
 
+  gtk_widget_class_bind_template_callback (widget_class, list_has_selection_closure);
   gtk_widget_class_bind_template_callback (widget_class, ranking_features_model_closure);
   gtk_widget_class_bind_template_callback (widget_class, add_override_button_sensitive_closure);
   gtk_widget_class_bind_template_callback (widget_class, add_override_button_clicked_cb);

src/bin/clapper-app/css/styles.css

@@ -21,10 +21,10 @@ window.info .subcontent streamlist preferencesgroup {
 window.preferences .subcontent {
   margin: 16px;
 }
-window.preferences .pluginssubpage .subcontent popover {
+window.preferences .configsubpage .subcontent popover {
   min-width: 264px;
 }
-window.preferences .pluginssubpage .subcontent button.pill {
+window.preferences .configsubpage .subcontent button.pill {
   margin-top: 8px;
   margin-bottom: 8px;
 }

src/bin/clapper-app/ui/clapper-app-preferences-window.ui

@@ -136,6 +136,24 @@
       <object class="AdwPreferencesPage">
         <property name="title" translatable="yes">Tweaks</property>
         <property name="icon-name">applications-engineering-symbolic</property>
+        <child>
+          <object class="AdwPreferencesGroup">
+            <property name="title" translatable="no">Clapper</property>
+            <child>
+              <object class="AdwActionRow">
+                <property name="title" translatable="yes">Enhancers</property>
+                <property name="subtitle" translatable="yes">Browse and configure properties of available enhancers</property>
+                <property name="activatable">true</property>
+                <signal name="activated" handler="enhancers_config_activated_cb"/>
+                <child>
+                  <object class="GtkImage">
+                    <property name="icon_name">go-next-symbolic</property>
+                  </object>
+                </child>
+              </object>
+            </child>
+          </object>
+        </child>
         <child>
           <object class="AdwPreferencesGroup">
             <property name="title" translatable="no">GStreamer</property>
@@ -160,6 +178,124 @@
       <class name="preferences"/>
     </style>
   </template>
+  <object class="AdwNavigationPage" id="enhancers_subpage">
+    <property name="title" translatable="yes">Clapper Enhancers</property>
+    <property name="child">
+      <object class="AdwToolbarView">
+        <child type="top">
+          <object class="AdwHeaderBar"/>
+        </child>
+        <property name="content">
+          <object class="GtkScrolledWindow">
+            <child>
+              <object class="AdwClamp">
+                <style>
+                  <class name="subcontent"/>
+                </style>
+                <child>
+                  <object class="GtkStack" id="enhancers_stack">
+                    <child>
+                      <object class="GtkBox" id="browse_enhancers_page">
+                        <property name="orientation">vertical</property>
+                        <child>
+                          <object class="AdwPreferencesGroup">
+                            <property name="title" translatable="yes">Available enhancers</property>
+                            <property name="description" translatable="yes">Select an enhancer plugin to view its information and properties to configure.</property>
+                            <child>
+                              <object class="AdwComboRow" id="enhancers_combo_row">
+                                <property name="title" translatable="yes">Enhancer</property>
+                                <property name="enable-search">true</property>
+                                <property name="expression">
+                                  <lookup type="ClapperEnhancerProxy" name="friendly-name"/>
+                                </property>
+                                <signal name="notify::selected" handler="selected_enhancer_changed_cb"/>
+                              </object>
+                            </child>
+                          </object>
+                        </child>
+                        <child>
+                          <object class="GtkBox">
+                            <property name="orientation">vertical</property>
+                            <binding name="visible">
+                              <closure type="gboolean" function="list_has_selection_closure">
+                                <lookup name="selected">enhancers_combo_row</lookup>
+                              </closure>
+                            </binding>
+                            <child>
+                              <object class="AdwPreferencesGroup">
+                                <property name="title" translatable="yes">Information</property>
+                                <child>
+                                  <object class="AdwActionRow">
+                                    <property name="title" translatable="yes">Module</property>
+                                    <binding name="subtitle">
+                                      <lookup name="module-name" type="ClapperEnhancerProxy">
+                                        <lookup name="selected-item">enhancers_combo_row</lookup>
+                                      </lookup>
+                                    </binding>
+                                    <style>
+                                      <class name="property"/>
+                                    </style>
+                                  </object>
+                                </child>
+                                <child>
+                                  <object class="AdwActionRow">
+                                    <property name="title" translatable="yes">Description</property>
+                                    <binding name="subtitle">
+                                      <lookup name="description" type="ClapperEnhancerProxy">
+                                        <lookup name="selected-item">enhancers_combo_row</lookup>
+                                      </lookup>
+                                    </binding>
+                                    <style>
+                                      <class name="property"/>
+                                    </style>
+                                  </object>
+                                </child>
+                                <child>
+                                  <object class="AdwActionRow">
+                                    <property name="title" translatable="yes">Version</property>
+                                    <binding name="subtitle">
+                                      <lookup name="version" type="ClapperEnhancerProxy">
+                                        <lookup name="selected-item">enhancers_combo_row</lookup>
+                                      </lookup>
+                                    </binding>
+                                    <style>
+                                      <class name="property"/>
+                                    </style>
+                                  </object>
+                                </child>
+                              </object>
+                            </child>
+                            <child>
+                              <object class="AdwPreferencesGroup" id="enhancer_config_group">
+                                <property name="title" translatable="yes">Properties</property>
+                              </object>
+                            </child>
+                          </object>
+                        </child>
+                      </object>
+                    </child>
+                    <child>
+                      <object class="AdwStatusPage" id="no_enhancers_page">
+                        <property name="vexpand">true</property>
+                        <property name="hexpand">true</property>
+                        <property name="icon-name">edit-find-symbolic</property>
+                        <property name="title" translatable="yes">No Clapper Enhancers Found</property>
+                        <property name="description" translatable="yes">Install some to add more cool functionalities to the player!</property>
+                      </object>
+                    </child>
+                  </object>
+                </child>
+              </object>
+            </child>
+          </object>
+        </property>
+      </object>
+    </property>
+    <signal name="unrealize" handler="plugin_ranking_unrealize_cb"/>
+    <style>
+      <class name="configsubpage"/>
+    </style>
+  </object>
   <object class="AdwNavigationPage" id="plugins_subpage">
     <property name="title" translatable="yes">Plugin Ranking</property>
     <property name="child">
@@ -240,7 +376,7 @@
     </property>
     <signal name="unrealize" handler="plugin_ranking_unrealize_cb"/>
     <style>
-      <class name="pluginssubpage"/>
+      <class name="configsubpage"/>
     </style>
   </object>
 </interface>