[glib/prop-action-state-hints] property action: Add state hints

[Matthias Clasen <matthiasc src gnome org>]

commit 459c4f296af01fb8fac2adc5befd9b7d2d617a5b
Author: Matthias Clasen <mclasen redhat com>
Date:   Mon Jun 10 00:01:57 2019 +0000

    property action: Add state hints
    
    We have this information in the param specs,
    we might as well pass it on to give consumers
    a chance to present meaningful UIs for these
    actions.

 gio/gpropertyaction.c | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)
---
diff --git a/gio/gpropertyaction.c b/gio/gpropertyaction.c
index c1ce813ae..9ce9ab52e 100644
--- a/gio/gpropertyaction.c
+++ b/gio/gpropertyaction.c
@@ -158,6 +158,29 @@ g_property_action_get_state_type (GAction *action)
 static GVariant *
 g_property_action_get_state_hint (GAction *action)
 {
+  GPropertyAction *paction = G_PROPERTY_ACTION (action);
+
+  if (paction->pspec->value_type == G_TYPE_INT)
+    {
+      GParamSpecInt *pspec = (GParamSpecInt *)paction->pspec;
+      return g_variant_new ("(ii)", pspec->minimum, pspec->maximum);
+    }
+  else if (paction->pspec->value_type == G_TYPE_UINT)
+    {
+      GParamSpecUInt *pspec = (GParamSpecUInt *)paction->pspec;
+      return g_variant_new ("(uu)", pspec->minimum, pspec->maximum);
+    }
+  else if (paction->pspec->value_type == G_TYPE_FLOAT)
+    {
+      GParamSpecFloat *pspec = (GParamSpecFloat *)paction->pspec;
+      return g_variant_new ("(dd)", (double)pspec->minimum, (double)pspec->maximum);
+    }
+  else if (paction->pspec->value_type == G_TYPE_DOUBLE)
+    {
+      GParamSpecDouble *pspec = (GParamSpecDouble *)paction->pspec;
+      return g_variant_new ("(dd)", pspec->minimum, pspec->maximum);
+    }
+
   return NULL;
 }