Use GPtrArray internally to PurpleRequest{Group,Page}

Now that we don't export a `GList`, we can use these arrays internally.

Testing Done:
Opened Request Fields from Demo protocol, and confirmed all groups/fields were there.

Reviewed at https://reviews.imfreedom.org/r/2364/

2 files changed, 16 insertions, 14 deletions

diff --git a/libpurple/purplerequestgroup.c b/libpurple/purplerequestgroup.c
index 21bb48db46..ae2dd038be 100644
--- a/libpurple/purplerequestgroup.c
+++ b/libpurple/purplerequestgroup.c
@@ -29,7 +29,7 @@ struct _PurpleRequestGroup {
 
 	char *title;
 
-	GList *fields;
+	GPtrArray *fields;
 	GHashTable *invalid_fields;
 };
 
@@ -89,7 +89,7 @@ static guint
 purple_request_group_get_n_items(GListModel *model) {
 	PurpleRequestGroup *group = PURPLE_REQUEST_GROUP(model);
 
-	return g_list_length(group->fields);
+	return group->fields->len;
 }
 
 static gpointer
@@ -97,8 +97,8 @@ purple_request_group_get_item(GListModel *model, guint index) {
 	PurpleRequestGroup *group = PURPLE_REQUEST_GROUP(model);
 	PurpleRequestField *field = NULL;
 
-	field = g_list_nth_data(group->fields, index);
-	if(PURPLE_IS_REQUEST_FIELD(field)) {
+	if(index < group->fields->len) {
+		field = g_ptr_array_index(group->fields, index);
 		g_object_ref(field);
 	}
 
@@ -160,7 +160,7 @@ purple_request_group_finalize(GObject *obj) {
 
 	g_free(group->title);
 
-	g_list_free_full(group->fields, g_object_unref);
+	g_clear_pointer(&group->fields, g_ptr_array_unref);
 	g_clear_pointer(&group->invalid_fields, g_hash_table_destroy);
 
 	G_OBJECT_CLASS(purple_request_group_parent_class)->finalize(obj);
@@ -168,6 +168,7 @@ purple_request_group_finalize(GObject *obj) {
 
 static void
 purple_request_group_init(PurpleRequestGroup *group) {
+	group->fields = g_ptr_array_new_with_free_func(g_object_unref);
 	group->invalid_fields = g_hash_table_new(g_direct_hash, g_direct_equal);
 }
 
@@ -227,8 +228,8 @@ purple_request_group_add_field(PurpleRequestGroup *group,
 	g_return_if_fail(PURPLE_IS_REQUEST_GROUP(group));
 	g_return_if_fail(PURPLE_IS_REQUEST_FIELD(field));
 
-	position = g_list_length(group->fields);
-	group->fields = g_list_append(group->fields, field);
+	position = group->fields->len;
+	g_ptr_array_add(group->fields, field);
 
 	purple_request_group_notify_field_cb(G_OBJECT(field), NULL, group);
 	g_signal_connect(field, "notify::valid",
diff --git a/libpurple/purplerequestpage.c b/libpurple/purplerequestpage.c
index 9aee11407c..7c62b299d5 100644
--- a/libpurple/purplerequestpage.c
+++ b/libpurple/purplerequestpage.c
@@ -33,7 +33,7 @@
 struct _PurpleRequestPage {
 	GObject parent;
 
-	GList *groups;
+	GPtrArray *groups;
 	GHashTable *invalid_groups;
 
 	GHashTable *fields;
@@ -103,7 +103,7 @@ static guint
 purple_request_page_get_n_items(GListModel *model) {
 	PurpleRequestPage *page = PURPLE_REQUEST_PAGE(model);
 
-	return g_list_length(page->groups);
+	return page->groups->len;
 }
 
 static gpointer
@@ -111,8 +111,8 @@ purple_request_page_get_item(GListModel *model, guint index) {
 	PurpleRequestPage *page = PURPLE_REQUEST_PAGE(model);
 	PurpleRequestGroup *group = NULL;
 
-	group = g_list_nth_data(page->groups, index);
-	if(PURPLE_IS_REQUEST_GROUP(group)) {
+	if(index < page->groups->len) {
+		group = g_ptr_array_index(page->groups, index);
 		g_object_ref(group);
 	}
 
@@ -153,7 +153,7 @@ static void
 purple_request_page_finalize(GObject *obj) {
 	PurpleRequestPage *page = PURPLE_REQUEST_PAGE(obj);
 
-	g_list_free_full(page->groups, g_object_unref);
+	g_clear_pointer(&page->groups, g_ptr_array_unref);
 	g_clear_pointer(&page->invalid_groups, g_hash_table_destroy);
 	g_hash_table_destroy(page->fields);
 
@@ -162,6 +162,7 @@ purple_request_page_finalize(GObject *obj) {
 
 static void
 purple_request_page_init(PurpleRequestPage *page) {
+	page->groups = g_ptr_array_new_with_free_func(g_object_unref);
 	page->fields = g_hash_table_new_full(g_str_hash, g_str_equal, g_free, NULL);
 	page->invalid_groups = g_hash_table_new(g_direct_hash, g_direct_equal);
 }
@@ -207,8 +208,8 @@ purple_request_page_add_group(PurpleRequestPage *page,
 	g_return_if_fail(PURPLE_IS_REQUEST_PAGE(page));
 	g_return_if_fail(PURPLE_IS_REQUEST_GROUP(group));
 
-	position = g_list_length(page->groups);
-	page->groups = g_list_append(page->groups, group);
+	position = page->groups->len;
+	g_ptr_array_add(page->groups, group);
 
 	purple_request_page_notify_group_cb(G_OBJECT(group), NULL, page);
 	g_signal_connect(group, "notify::valid",