text: Add commit request

Allows for atomic state changes. Updated surrounding text, content type
and micro focus is taken into account all at once at commit.

Signed-off-by: Jan Arne Petersen <jpetersen@openismus.com>
diff --git a/src/text-backend.c b/src/text-backend.c
index c7761a9..f096a9b 100644
--- a/src/text-backend.c
+++ b/src/text-backend.c
@@ -257,6 +257,20 @@
 	}
 }
 
+static void
+text_model_commit(struct wl_client *client,
+		  struct wl_resource *resource)
+{
+	struct text_model *text_model = resource->data;
+	struct input_method *input_method, *next;
+
+	wl_list_for_each_safe(input_method, next, &text_model->input_methods, link) {
+		if (!input_method->context)
+			continue;
+		input_method_context_send_commit(&input_method->context->resource);
+	}
+}
+
 static const struct text_model_interface text_model_implementation = {
 	text_model_set_surrounding_text,
 	text_model_activate,
@@ -264,7 +278,8 @@
 	text_model_reset,
 	text_model_set_micro_focus,
 	text_model_set_content_type,
-	text_model_invoke_action
+	text_model_invoke_action,
+	text_model_commit
 };
 
 static void text_model_factory_create_text_model(struct wl_client *client,