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testtreelistmodel: Make the directory loading async

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This is way more complicated than it should be, because it requires
manually limiting the number of open file enumerators.

On the other hand, it exhaustively tests the items-changed emission of
all involved listmodels because those signals come in pretty much
randomly.

It's also 50% slower than the sync version, with the caeat that the sync
version only shows the UI after it's done loading, while this version
shows it right away.
This commit is contained in:
Benjamin Otte 2018-09-12 05:04:17 +02:00
parent 65b795b861
commit fcb780ee13
1 changed files with 104 additions and 23 deletions
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127
tests/testtreelistmodel.c
View File

@ -2,42 +2,123 @@
#define ROWS 30
static GListModel *
create_list_model_for_directory (gpointer file,
gpointer unused)
GSList *pending;
guint active = 0;
static void
got_files (GObject *enumerate,
GAsyncResult *res,
gpointer store);
static gboolean
start_enumerate (GListStore *store)
{
GFileEnumerator *enumerate;
GListStore *store;
GFile *child;
GFileInfo *info;
if (g_file_query_file_type (file, G_FILE_QUERY_INFO_NOFOLLOW_SYMLINKS, NULL) != G_FILE_TYPE_DIRECTORY)
return NULL;
GFile *file = g_object_get_data (G_OBJECT (store), "file");
GError *error = NULL;
enumerate = g_file_enumerate_children (file,
G_FILE_ATTRIBUTE_STANDARD_TYPE
"," G_FILE_ATTRIBUTE_STANDARD_NAME,
0,
NULL,
NULL);
&error);
if (enumerate == NULL)
{
if (g_error_matches (error, G_IO_ERROR, G_IO_ERROR_TOO_MANY_OPEN_FILES))
{
g_clear_error (&error);
pending = g_slist_prepend (pending, g_object_ref (store));
return TRUE;
}
g_clear_error (&error);
g_object_unref (store);
return FALSE;
}
if (active > 20)
{
g_object_unref (enumerate);
pending = g_slist_prepend (pending, g_object_ref (store));
return TRUE;
}
active++;
g_file_enumerator_next_files_async (enumerate,
g_file_is_native (file) ? 5000 : 100,
G_PRIORITY_DEFAULT_IDLE,
NULL,
got_files,
g_object_ref (store));
g_object_unref (enumerate);
return TRUE;
}
static void
got_files (GObject *enumerate,
GAsyncResult *res,
gpointer store)
{
GList *l, *files;
GFile *file = g_object_get_data (store, "file");
GPtrArray *array;
files = g_file_enumerator_next_files_finish (G_FILE_ENUMERATOR (enumerate), res, NULL);
if (files == NULL)
{
g_object_unref (store);
if (pending)
{
GListStore *store = pending->data;
pending = g_slist_remove (pending, store);
start_enumerate (store);
}
active--;
return;
}
array = g_ptr_array_new ();
g_ptr_array_new_with_free_func (g_object_unref);
for (l = files; l; l = l->next)
{
GFileInfo *info = l->data;
GFile *child;
child = g_file_get_child (file, g_file_info_get_name (info));
g_ptr_array_add (array, child);
}
g_list_free_full (files, g_object_unref);
g_list_store_splice (store, g_list_model_get_n_items (store), 0, array->pdata, array->len);
g_ptr_array_unref (array);
g_file_enumerator_next_files_async (G_FILE_ENUMERATOR (enumerate),
g_file_is_native (file) ? 5000 : 100,
G_PRIORITY_DEFAULT_IDLE,
NULL,
got_files,
store);
}
static GListModel *
create_list_model_for_directory (gpointer file,
gpointer unused)
{
GListStore *store;
if (g_file_query_file_type (file, G_FILE_QUERY_INFO_NOFOLLOW_SYMLINKS, NULL) != G_FILE_TYPE_DIRECTORY)
return NULL;
store = g_list_store_new (G_TYPE_FILE);
g_object_set_data_full (G_OBJECT (store), "file", g_object_ref (file), g_object_unref);
while (g_file_enumerator_iterate (enumerate, &info, NULL, NULL, NULL))
{
if (info == NULL)
break;
child = g_file_get_child (file, g_file_info_get_name (info));
g_list_store_append (store, child);
g_object_unref (child);
}
g_object_unref (enumerate);
return G_LIST_MODEL (store);
if (start_enumerate (store))
return G_LIST_MODEL (store);
else
return NULL;
}
static GtkWidget *