[gtk+] gadget: Add helpers for modifying state

[Benjamin Otte <otte src gnome org>]

commit 8c1a73326c2871206a007b55da587000760cc15b
Author: Benjamin Otte <otte redhat com>
Date:   Sat Dec 19 08:46:28 2015 +0100

    gadget: Add helpers for modifying state
    
    They will be used in future commits.
    
    I also was too lazy to convert existing widgets.

 gtk/gtkcssgadget.c        |   50 +++++++++++++++++++++++++++++++++++++++++++++
 gtk/gtkcssgadgetprivate.h |    6 +++++
 2 files changed, 56 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkcssgadget.c b/gtk/gtkcssgadget.c
index c068c95..dfda403 100644
--- a/gtk/gtkcssgadget.c
+++ b/gtk/gtkcssgadget.c
@@ -394,6 +394,56 @@ gtk_css_gadget_remove_class (GtkCssGadget *gadget,
   gtk_css_node_remove_class (priv->node, quark);
 }
 
+/**
+ * gtk_css_gadget_set_state:
+ * @gadget: a #GtkCssGadget
+ * @state: The new state
+ *
+ * Sets the state of the gadget's CSS node.
+ */
+void
+gtk_css_gadget_set_state (GtkCssGadget  *gadget,
+                          GtkStateFlags  state)
+{
+  GtkCssGadgetPrivate *priv = gtk_css_gadget_get_instance_private (gadget);
+
+  gtk_css_node_set_state (priv->node, state);
+}
+
+/**
+ * gtk_css_gadget_add_state:
+ * @gadget: a #GtkCssGadget
+ * @state: The state to add
+ *
+ * Adds the given states to the states of gadget's CSS node. Other states
+ * will be kept as they are.
+ */
+void
+gtk_css_gadget_add_state (GtkCssGadget  *gadget,
+                          GtkStateFlags  state)
+{
+  GtkCssGadgetPrivate *priv = gtk_css_gadget_get_instance_private (gadget);
+
+  gtk_css_node_set_state (priv->node, gtk_css_node_get_state (priv->node) | state);
+}
+
+/**
+ * gtk_css_gadget_remove_state:
+ * @gadget: a #GtkCssGadget
+ * @state: The state to remove
+ *
+ * Adds the given states to the states of gadget's CSS node. Other states
+ * will be kept as they are.
+ */
+void
+gtk_css_gadget_remove_state (GtkCssGadget  *gadget,
+                             GtkStateFlags  state)
+{
+  GtkCssGadgetPrivate *priv = gtk_css_gadget_get_instance_private (gadget);
+
+  gtk_css_node_set_state (priv->node, gtk_css_node_get_state (priv->node) & ~state);
+}
+
 static gint
 get_number (GtkCssStyle *style,
             guint        property)
diff --git a/gtk/gtkcssgadgetprivate.h b/gtk/gtkcssgadgetprivate.h
index b23f5e7..40efe8d 100644
--- a/gtk/gtkcssgadgetprivate.h
+++ b/gtk/gtkcssgadgetprivate.h
@@ -86,6 +86,12 @@ void            gtk_css_gadget_add_class                (GtkCssGadget
                                                          const char             *name);
 void            gtk_css_gadget_remove_class             (GtkCssGadget           *gadget,
                                                          const char             *name);
+void            gtk_css_gadget_set_state                (GtkCssGadget           *gadget,
+                                                         GtkStateFlags           state);
+void            gtk_css_gadget_add_state                (GtkCssGadget           *gadget,
+                                                         GtkStateFlags           state);
+void            gtk_css_gadget_remove_state             (GtkCssGadget           *gadget,
+                                                         GtkStateFlags           state);
 
 void            gtk_css_gadget_get_preferred_size       (GtkCssGadget           *gadget,
                                                          GtkOrientation          orientation,