[gnome-builder/tweak] GbEditorTweakWidget: add language mode filtering

[Christian Hergert <chergert src gnome org>]

commit ea0c61ffb7fd8ae045397e28aad01d990f4550d5
Author: Christian Hergert <christian hergert me>
Date:   Tue Dec 16 20:07:33 2014 -0800

    GbEditorTweakWidget: add language mode filtering

 src/editor/gb-editor-tweak-widget.c |   91 +++++++++++++++++++++++++++++++++++
 1 files changed, 91 insertions(+), 0 deletions(-)
---
diff --git a/src/editor/gb-editor-tweak-widget.c b/src/editor/gb-editor-tweak-widget.c
index cf6163b..d864850 100644
--- a/src/editor/gb-editor-tweak-widget.c
+++ b/src/editor/gb-editor-tweak-widget.c
@@ -19,8 +19,10 @@
 #define G_LOG_DOMAIN "editor-tweak"
 
 #include <glib/gi18n.h>
+#include <gtksourceview/gtksource.h>
 
 #include "gb-editor-tweak-widget.h"
+#include "gb-string.h"
 #include "gb-widget.h"
 
 struct _GbEditorTweakWidgetPrivate
@@ -38,6 +40,7 @@ enum {
 };
 
 static GParamSpec *gParamSpecs [LAST_PROP];
+static GQuark      gLangQuark;
 
 GtkWidget *
 gb_editor_tweak_widget_new (void)
@@ -45,6 +48,91 @@ gb_editor_tweak_widget_new (void)
   return g_object_new (GB_TYPE_EDITOR_TWEAK_WIDGET, NULL);
 }
 
+static gboolean
+gb_editor_tweak_widget_filter_func (GtkListBoxRow *row,
+                                    gpointer       user_data)
+{
+  GtkSourceLanguage *language;
+  GtkWidget *child;
+  const gchar *needle = user_data;
+  const gchar *lang_id;
+  const gchar *lang_name;
+
+  g_return_val_if_fail (GTK_IS_LIST_BOX_ROW (row), FALSE);
+  g_return_val_if_fail (needle, FALSE);
+
+  child = gtk_bin_get_child (GTK_BIN (row));
+  language = g_object_get_qdata (G_OBJECT (child), gLangQuark);
+  lang_id = gtk_source_language_get_id (language);
+  lang_name = gtk_source_language_get_name (language);
+
+  if (strstr (lang_id, needle) || strstr (lang_name, needle))
+    return TRUE;
+
+  return FALSE;
+}
+
+static void
+gb_editor_tweak_widget_entry_changed (GbEditorTweakWidget *widget,
+                                      GtkEntry            *entry)
+{
+  const gchar *text;
+
+  g_return_if_fail (GB_IS_EDITOR_TWEAK_WIDGET (widget));
+  g_return_if_fail (GTK_IS_ENTRY (entry));
+
+  text = gtk_entry_get_text (entry);
+
+  if (gb_str_empty0 (text))
+    gtk_list_box_set_filter_func (widget->priv->list_box, NULL, NULL, NULL);
+  else
+    gtk_list_box_set_filter_func (widget->priv->list_box,
+                                  gb_editor_tweak_widget_filter_func,
+                                  g_strdup (text),
+                                  g_free);
+}
+
+static void
+gb_editor_tweak_widget_constructed (GObject *object)
+{
+  GbEditorTweakWidget *widget = (GbEditorTweakWidget *)object;
+  GtkSourceLanguageManager *manager;
+  GtkSourceLanguage *lang;
+  const gchar * const *lang_ids;
+  guint i;
+
+  g_return_if_fail (GB_IS_EDITOR_TWEAK_WIDGET (widget));
+
+  G_OBJECT_CLASS (gb_editor_tweak_widget_parent_class)->constructed (object);
+
+  manager = gtk_source_language_manager_get_default ();
+  lang_ids = gtk_source_language_manager_get_language_ids (manager);
+
+  for (i = 0; lang_ids [i]; i++)
+    {
+      GtkWidget *row;
+
+      lang = gtk_source_language_manager_get_language (manager, lang_ids [i]);
+      row = g_object_new (GTK_TYPE_LABEL,
+                          "label", gtk_source_language_get_name (lang),
+                          "visible", TRUE,
+                          "xalign", 0.0f,
+                          "margin-end", 6,
+                          "margin-start", 6,
+                          "margin-top", 3,
+                          "margin-bottom", 3,
+                          NULL);
+      g_object_set_qdata (G_OBJECT (row), gLangQuark, lang);
+      gtk_list_box_insert (widget->priv->list_box, row, -1);
+    }
+
+  g_signal_connect_object (widget->priv->entry,
+                           "changed",
+                           G_CALLBACK (gb_editor_tweak_widget_entry_changed),
+                           widget,
+                           G_CONNECT_SWAPPED);
+}
+
 static void
 gb_editor_tweak_widget_finalize (GObject *object)
 {
@@ -87,6 +175,7 @@ gb_editor_tweak_widget_class_init (GbEditorTweakWidgetClass *klass)
   GObjectClass *object_class = G_OBJECT_CLASS (klass);
   GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
 
+  object_class->constructed = gb_editor_tweak_widget_constructed;
   object_class->finalize = gb_editor_tweak_widget_finalize;
   object_class->get_property = gb_editor_tweak_widget_get_property;
   object_class->set_property = gb_editor_tweak_widget_set_property;
@@ -94,6 +183,8 @@ gb_editor_tweak_widget_class_init (GbEditorTweakWidgetClass *klass)
   GB_WIDGET_CLASS_TEMPLATE (widget_class, "gb-editor-tweak-widget.ui");
   GB_WIDGET_CLASS_BIND (widget_class, GbEditorTweakWidget, entry);
   GB_WIDGET_CLASS_BIND (widget_class, GbEditorTweakWidget, list_box);
+
+  gLangQuark = g_quark_from_static_string ("GtkSourceLanguage");
 }
 
 static void