[gtk: 9/60] a11y: Allow bulk attribute update with the GValue API

[Matthias Clasen <matthiasc src gnome org>]

commit 92737b27bf1f074b16f27106647d858439caa97f
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Wed Aug 5 15:03:00 2020 +0100

    a11y: Allow bulk attribute update with the GValue API
    
    Like we do for the varargs API.

 gtk/gtkaccessible.c | 150 +++++++++++++++++++++++++++++-----------------------
 gtk/gtkaccessible.h |  15 +++---
 2 files changed, 93 insertions(+), 72 deletions(-)
---
diff --git a/gtk/gtkaccessible.c b/gtk/gtkaccessible.c
index f8dc8640af..b136f1a946 100644
--- a/gtk/gtkaccessible.c
+++ b/gtk/gtkaccessible.c
@@ -174,10 +174,11 @@ out:
 /**
  * gtk_accessible_update_state_value:
  * @self: a #GtkAccessible
- * @state: a #GtkAccessibleState
- * @value: a #GValue with the value for @state
+ * @n_states: the number of accessible states to set
+ * @states: (array length=n_states): an array of #GtkAccessibleState
+ * @values: (array length=n_states): an array of #GValues, one for each state
  *
- * Updates an accessible state.
+ * Updates an array of accessible states.
  *
  * This function should be called by #GtkWidget types whenever an accessible
  * state change must be communicated to assistive technologies.
@@ -186,34 +187,39 @@ out:
  */
 void
 gtk_accessible_update_state_value (GtkAccessible      *self,
-                                   GtkAccessibleState  state,
-                                   const GValue       *value)
+                                   int                 n_states,
+                                   GtkAccessibleState  states[],
+                                   const GValue        values[])
 {
-  GtkATContext *context;
-
   g_return_if_fail (GTK_IS_ACCESSIBLE (self));
+  g_return_if_fail (n_states > 0);
 
-  context = gtk_accessible_get_at_context (self);
+  GtkATContext *context = gtk_accessible_get_at_context (self);
   if (context == NULL)
     return;
 
-  GError *error = NULL;
-  GtkAccessibleValue *real_value =
-    gtk_accessible_value_collect_for_state_value (state, value, &error);
-
-  if (error != NULL)
+  for (int i = 0; i < n_states; i++)
     {
-      g_critical ("Unable to collect the value for state “%s”: %s",
-                  gtk_accessible_state_get_attribute_name (state),
-                  error->message);
-      g_error_free (error);
-      return;
-    }
+      GtkAccessibleState state = states[i];
+      const GValue *value = &(values[i]);
+      GError *error = NULL;
+      GtkAccessibleValue *real_value =
+        gtk_accessible_value_collect_for_state_value (state, value, &error);
 
-  gtk_at_context_set_accessible_state (context, state, real_value);
+      if (error != NULL)
+        {
+          g_critical ("Unable to collect the value for state “%s”: %s",
+                      gtk_accessible_state_get_attribute_name (state),
+                      error->message);
+          g_error_free (error);
+          break;
+        }
+
+      gtk_at_context_set_accessible_state (context, state, real_value);
 
-  if (real_value != NULL)
-    gtk_accessible_value_unref (real_value);
+      if (real_value != NULL)
+        gtk_accessible_value_unref (real_value);
+    }
 
   gtk_at_context_update (context);
 }
@@ -312,10 +318,11 @@ out:
 /**
  * gtk_accessible_update_property_value:
  * @self: a #GtkAccessible
- * @property: a #GtkAccessibleProperty
- * @value: a #GValue with the value for @property
+ * @n_properties: the number of accessible properties to set
+ * @properties: (array length=n_properties): an array of #GtkAccessibleProperty
+ * @values: (array length=n_properties): an array of #GValues, one for each property
  *
- * Updates an accessible property.
+ * Updates an array of accessible properties.
  *
  * This function should be called by #GtkWidget types whenever an accessible
  * property change must be communicated to assistive technologies.
@@ -324,34 +331,39 @@ out:
  */
 void
 gtk_accessible_update_property_value (GtkAccessible         *self,
-                                      GtkAccessibleProperty  property,
-                                      const GValue          *value)
+                                      int                    n_properties,
+                                      GtkAccessibleProperty  properties[],
+                                      const GValue           values[])
 {
-  GtkATContext *context;
-
   g_return_if_fail (GTK_IS_ACCESSIBLE (self));
+  g_return_if_fail (n_properties > 0);
 
-  context = gtk_accessible_get_at_context (self);
+  GtkATContext *context = gtk_accessible_get_at_context (self);
   if (context == NULL)
     return;
 
-  GError *error = NULL;
-  GtkAccessibleValue *real_value =
-    gtk_accessible_value_collect_for_property_value (property, value, &error);
-
-  if (error != NULL)
+  for (int i = 0; i < n_properties; i++)
     {
-      g_critical ("Unable to collect the value for property “%s”: %s",
-                  gtk_accessible_property_get_attribute_name (property),
-                  error->message);
-      g_error_free (error);
-      return;
-    }
+      GtkAccessibleProperty property = properties[i];
+      const GValue *value = &(values[i]);
+      GError *error = NULL;
+      GtkAccessibleValue *real_value =
+        gtk_accessible_value_collect_for_property_value (property, value, &error);
+
+      if (error != NULL)
+        {
+          g_critical ("Unable to collect the value for property “%s”: %s",
+                      gtk_accessible_property_get_attribute_name (property),
+                      error->message);
+          g_error_free (error);
+          break;
+        }
 
-  gtk_at_context_set_accessible_property (context, property, real_value);
+      gtk_at_context_set_accessible_property (context, property, real_value);
 
-  if (real_value != NULL)
-    gtk_accessible_value_unref (real_value);
+      if (real_value != NULL)
+        gtk_accessible_value_unref (real_value);
+    }
 
   gtk_at_context_update (context);
 }
@@ -441,10 +453,11 @@ out:
 /**
  * gtk_accessible_update_relation_value:
  * @self: a #GtkAccessible
- * @relation: a #GtkAccessibleRelation
- * @value: a #GValue with the value for @relation
+ * @n_relations: the number of accessible relations to set
+ * @relations: (array length=n_relations): an array of #GtkAccessibleRelation
+ * @values: (array length=n_relations): an array of #GValues, one for each relation
  *
- * Updates an accessible relation.
+ * Updates an array of accessible relations.
  *
  * This function should be called by #GtkWidget types whenever an accessible
  * relation change must be communicated to assistive technologies.
@@ -453,34 +466,39 @@ out:
  */
 void
 gtk_accessible_update_relation_value (GtkAccessible         *self,
-                                      GtkAccessibleRelation  relation,
-                                      const GValue          *value)
+                                      int                    n_relations,
+                                      GtkAccessibleRelation  relations[],
+                                      const GValue           values[])
 {
-  GtkATContext *context;
-
   g_return_if_fail (GTK_IS_ACCESSIBLE (self));
+  g_return_if_fail (n_relations > 0);
 
-  context = gtk_accessible_get_at_context (self);
+  GtkATContext *context = gtk_accessible_get_at_context (self);
   if (context == NULL)
     return;
 
-  GError *error = NULL;
-  GtkAccessibleValue *real_value =
-    gtk_accessible_value_collect_for_relation_value (relation, value, &error);
-
-  if (error != NULL)
+  for (int i = 0; i < n_relations; i++)
     {
-      g_critical ("Unable to collect the value for relation “%s”: %s",
-                  gtk_accessible_relation_get_attribute_name (relation),
-                  error->message);
-      g_error_free (error);
-      return;
-    }
+      GtkAccessibleRelation relation = relations[i];
+      const GValue *value = &(values[i]);
+      GError *error = NULL;
+      GtkAccessibleValue *real_value =
+        gtk_accessible_value_collect_for_relation_value (relation, value, &error);
+
+      if (error != NULL)
+        {
+          g_critical ("Unable to collect the value for relation “%s”: %s",
+                      gtk_accessible_relation_get_attribute_name (relation),
+                      error->message);
+          g_error_free (error);
+          break;
+        }
 
-  gtk_at_context_set_accessible_relation (context, relation, real_value);
+      gtk_at_context_set_accessible_relation (context, relation, real_value);
 
-  if (real_value != NULL)
-    gtk_accessible_value_unref (real_value);
+      if (real_value != NULL)
+        gtk_accessible_value_unref (real_value);
+    }
 
   gtk_at_context_update (context);
 }
diff --git a/gtk/gtkaccessible.h b/gtk/gtkaccessible.h
index 0aec20974f..c8b00cd35b 100644
--- a/gtk/gtkaccessible.h
+++ b/gtk/gtkaccessible.h
@@ -52,16 +52,19 @@ void                    gtk_accessible_update_relation          (GtkAccessible
                                                                  ...);
 GDK_AVAILABLE_IN_ALL
 void                    gtk_accessible_update_state_value       (GtkAccessible         *self,
-                                                                 GtkAccessibleState     state,
-                                                                 const GValue          *value);
+                                                                 int                    n_states,
+                                                                 GtkAccessibleState     states[],
+                                                                 const GValue           values[]);
 GDK_AVAILABLE_IN_ALL
 void                    gtk_accessible_update_property_value    (GtkAccessible         *self,
-                                                                 GtkAccessibleProperty  property,
-                                                                 const GValue          *value);
+                                                                 int                    n_properties,
+                                                                 GtkAccessibleProperty  properties[],
+                                                                 const GValue           values[]);
 GDK_AVAILABLE_IN_ALL
 void                    gtk_accessible_update_relation_value    (GtkAccessible         *self,
-                                                                 GtkAccessibleRelation  relation,
-                                                                 const GValue          *value);
+                                                                 int                    n_relations,
+                                                                 GtkAccessibleRelation  relations[],
+                                                                 const GValue           values[]);
 
 GDK_AVAILABLE_IN_ALL
 void                    gtk_accessible_reset_state              (GtkAccessible         *self,