[gnome-builder] libide: add some more gtk util helpers

[Christian Hergert <chergert src gnome org>]

commit 6d6ee981a0baa62ce47d74486a4e8b38b2268871
Author: Christian Hergert <chergert redhat com>
Date:   Fri Nov 13 01:02:13 2015 -0800

    libide: add some more gtk util helpers

 libide/Makefile.am    |    2 +
 libide/util/ide-gtk.c |  126 +++++++++++++++++++++++++++++++++++++++++++++++++
 libide/util/ide-gtk.h |   41 ++++++++++++++++
 3 files changed, 169 insertions(+), 0 deletions(-)
---
diff --git a/libide/Makefile.am b/libide/Makefile.am
index 7667cda..bc721fd 100644
--- a/libide/Makefile.am
+++ b/libide/Makefile.am
@@ -305,6 +305,8 @@ libide_1_0_la_SOURCES = \
        util/ide-doc-seq.h \
        util/ide-gdk.c \
        util/ide-gdk.h \
+       util/ide-gtk.c \
+       util/ide-gtk.h \
        util/ide-line-reader.c \
        util/ide-line-reader.h \
        util/ide-list-inline.h \
diff --git a/libide/util/ide-gtk.c b/libide/util/ide-gtk.c
new file mode 100644
index 0000000..26071be
--- /dev/null
+++ b/libide/util/ide-gtk.c
@@ -0,0 +1,126 @@
+/* ide-gtk.c
+ *
+ * Copyright (C) 2015 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/>.
+ */
+
+#include "ide-gtk.h"
+
+gboolean
+ide_widget_action (GtkWidget   *widget,
+                   const gchar *prefix,
+                   const gchar *action_name,
+                   GVariant    *parameter)
+{
+  GtkWidget *toplevel;
+  GApplication *app;
+  GActionGroup *group = NULL;
+
+  g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
+  g_return_val_if_fail (prefix, FALSE);
+  g_return_val_if_fail (action_name, FALSE);
+
+  app = g_application_get_default ();
+  toplevel = gtk_widget_get_toplevel (widget);
+
+  while ((group == NULL) && (widget != NULL))
+    {
+      group = gtk_widget_get_action_group (widget, prefix);
+      widget = gtk_widget_get_parent (widget);
+    }
+
+  if (!group && g_str_equal (prefix, "win") && G_IS_ACTION_GROUP (toplevel))
+    group = G_ACTION_GROUP (toplevel);
+
+  if (!group && g_str_equal (prefix, "app") && G_IS_ACTION_GROUP (app))
+    group = G_ACTION_GROUP (app);
+
+  if (group && g_action_group_has_action (group, action_name))
+    {
+      g_action_group_activate_action (group, action_name, parameter);
+      return TRUE;
+    }
+
+  if (parameter && g_variant_is_floating (parameter))
+    {
+      parameter = g_variant_ref_sink (parameter);
+      g_variant_unref (parameter);
+    }
+
+  return FALSE;
+}
+
+static void
+ide_widget_notify_context (GtkWidget  *toplevel,
+                           GParamSpec *pspec,
+                           GtkWidget  *widget)
+{
+  IdeWidgetContextHandler handler;
+  IdeContext *context = NULL;
+
+  handler = g_object_get_data (G_OBJECT (widget), "IDE_CONTEXT_HANDLER");
+  if (!handler)
+    return;
+
+  g_object_get (toplevel, "context", &context, NULL);
+  handler (widget, context);
+  g_clear_object (&context);
+}
+
+static void
+ide_widget_hierarchy_changed (GtkWidget *widget,
+                              GtkWidget *previous_toplevel,
+                              gpointer   user_data)
+{
+  GtkWidget *toplevel;
+
+  g_assert (GTK_IS_WIDGET (widget));
+
+  if (GTK_IS_WINDOW (previous_toplevel))
+    g_signal_handlers_disconnect_by_func (previous_toplevel,
+                                          G_CALLBACK (ide_widget_notify_context),
+                                          widget);
+
+  toplevel = gtk_widget_get_toplevel (widget);
+
+  if (GTK_IS_WINDOW (toplevel))
+    {
+      g_signal_connect_object (toplevel,
+                               "notify::context",
+                               G_CALLBACK (ide_widget_notify_context),
+                               widget,
+                               0);
+      ide_widget_notify_context (toplevel, NULL, widget);
+    }
+}
+
+void
+ide_widget_set_context_handler (gpointer                widget,
+                                IdeWidgetContextHandler handler)
+{
+  GtkWidget *toplevel;
+
+  g_return_if_fail (GTK_IS_WIDGET (widget));
+
+  g_object_set_data (G_OBJECT (widget), "IDE_CONTEXT_HANDLER", handler);
+
+  g_signal_connect (widget,
+                    "hierarchy-changed",
+                    G_CALLBACK (ide_widget_hierarchy_changed),
+                    NULL);
+
+  if ((toplevel = gtk_widget_get_toplevel (widget)))
+    ide_widget_hierarchy_changed (widget, NULL, NULL);
+}
diff --git a/libide/util/ide-gtk.h b/libide/util/ide-gtk.h
new file mode 100644
index 0000000..d3f687a
--- /dev/null
+++ b/libide/util/ide-gtk.h
@@ -0,0 +1,41 @@
+/* ide-gtk.h
+ *
+ * Copyright (C) 2015 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/>.
+ */
+
+#ifndef IDE_GTK_H
+#define IDE_GTK_H
+
+#include <gtk/gtk.h>
+
+#include "ide-context.h"
+
+G_BEGIN_DECLS
+
+typedef void (*IdeWidgetContextHandler) (GtkWidget  *widget,
+                                         IdeContext *context);
+
+gboolean ide_widget_action              (GtkWidget               *widget,
+                                         const gchar             *group,
+                                         const gchar             *name,
+                                         GVariant                *param);
+void     ide_widget_set_context_handler (gpointer                 widget,
+                                         IdeWidgetContextHandler  handler);
+
+
+G_END_DECLS
+
+#endif /* IDE_GTK_H */