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filterlistmodel: Add incremental filtering

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This commit is contained in:
Benjamin Otte 2020-06-30 03:32:28 +02:00
parent d4b868d9bc
commit 2a90bc1a9b
3 changed files with 228 additions and 57 deletions
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2
docs/reference/gtk/gtk4-sections.txt
View File

@ -1547,6 +1547,8 @@ gtk_filter_list_model_set_model
gtk_filter_list_model_get_model
gtk_filter_list_model_set_filter
gtk_filter_list_model_get_filter
gtk_filter_list_model_set_incremental
gtk_filter_list_model_get_incremental
<SUBSECTION Standard>
GTK_FILTER_LIST_MODEL
GTK_IS_FILTER_LIST_MODEL

277
gtk/gtkfilterlistmodel.c
View File

@ -35,11 +35,16 @@
* listmodel.
* It hides some elements from the other model according to
* criteria given by a #GtkFilter.
*
* The model can be set up to do incremental searching, so that
* filtering long lists doesn't block the UI. See
* gtk_filter_list_model_set_incremental() for details.
*/
enum {
PROP_0,
PROP_FILTER,
PROP_INCREMENTAL,
PROP_MODEL,
NUM_PROPERTIES
};
@ -51,8 +56,11 @@ struct _GtkFilterListModel
GListModel *model;
GtkFilter *filter;
GtkFilterMatch strictness;
gboolean incremental;
GtkBitset *matches; /* NULL if strictness != GTK_FILTER_MATCH_SOME */
GtkBitset *pending; /* not yet filtered items or NULL if all filtered */
guint pending_cb; /* idle callback handle */
};
struct _GtkFilterListModelClass
@ -148,64 +156,111 @@ gtk_filter_list_model_run_filter_on_item (GtkFilterListModel *self,
}
static void
gtk_filter_list_model_run_filter (GtkFilterListModel *self)
gtk_filter_list_model_run_filter (GtkFilterListModel *self,
guint n_steps)
{
guint i, n_items;
GtkBitset *other;
GtkBitsetIter iter;
guint i, pos;
gboolean more;
g_return_if_fail (GTK_IS_FILTER_LIST_MODEL (self));
if (self->matches == NULL || self->model == NULL)
if (self->pending == NULL)
return;
n_items = g_list_model_get_n_items (self->model);
other = self->matches;
self->matches = gtk_bitset_new_empty ();
for (i = 0; i < n_items; i++)
for (i = 0, more = gtk_bitset_iter_init_first (&iter, self->pending, &pos);
i < n_steps && more;
i++, more = gtk_bitset_iter_next (&iter, &pos))
{
if (gtk_filter_list_model_run_filter_on_item (self, i))
gtk_bitset_add (self->matches, i);
if (gtk_filter_list_model_run_filter_on_item (self, pos))
gtk_bitset_add (self->matches, pos);
}
gtk_bitset_difference (other, self->matches);
if (!gtk_bitset_is_empty (other))
{
guint min, max, changes, additions, existing;
if (more)
gtk_bitset_remove_range_closed (self->pending, 0, pos);
else
g_clear_pointer (&self->pending, gtk_bitset_unref);
min = gtk_bitset_get_minimum (other);
max = gtk_bitset_get_maximum (other);
existing = gtk_bitset_get_size_in_range (self->matches, min, max);
changes = gtk_bitset_get_size (other);
gtk_bitset_intersect (other, self->matches);
additions = gtk_bitset_get_size (other);
g_list_model_items_changed (G_LIST_MODEL (self),
min > 0 ? gtk_bitset_get_size_in_range (self->matches, 0, min - 1) : 0,
existing - additions + (changes - additions),
existing);
}
gtk_bitset_unref (other);
return;
}
static guint
gtk_filter_list_model_add_items (GtkFilterListModel *self,
guint position,
guint n_items)
static void
gtk_filter_list_model_stop_filtering (GtkFilterListModel *self)
{
guint i, n_visible;
g_clear_pointer (&self->pending, gtk_bitset_unref);
g_clear_handle_id (&self->pending_cb, g_source_remove);
}
n_visible = 0;
for (i = 0; i < n_items; i++)
static void
gtk_filter_list_model_emit_items_changed_for_changes (GtkFilterListModel *self,
GtkBitset *old)
{
GtkBitset *changes;
changes = gtk_bitset_copy (self->matches);
gtk_bitset_difference (changes, old);
if (!gtk_bitset_is_empty (changes))
{
if (gtk_filter_list_model_run_filter_on_item (self, position + i))
{
gtk_bitset_add (self->matches, position + i);
n_visible++;
}
guint min, max;
min = gtk_bitset_get_minimum (changes);
max = gtk_bitset_get_maximum (changes);
g_list_model_items_changed (G_LIST_MODEL (self),
min > 0 ? gtk_bitset_get_size_in_range (self->matches, 0, min - 1) : 0,
gtk_bitset_get_size_in_range (old, min, max),
gtk_bitset_get_size_in_range (self->matches, min, max));
}
gtk_bitset_unref (changes);
gtk_bitset_unref (old);
}
static gboolean
gtk_filter_list_model_run_filter_cb (gpointer data)
{
GtkFilterListModel *self = data;
GtkBitset *old;
old = gtk_bitset_copy (self->matches);
gtk_filter_list_model_run_filter (self, 512);
if (self->pending == NULL)
gtk_filter_list_model_stop_filtering (self);
gtk_filter_list_model_emit_items_changed_for_changes (self, old);
return G_SOURCE_CONTINUE;
}
/* NB: bitset is (transfer full) */
static void
gtk_filter_list_model_start_filtering (GtkFilterListModel *self,
GtkBitset *items)
{
if (self->pending)
{
gtk_bitset_union (self->pending, items);
gtk_bitset_unref (items);
return;
}
return n_visible;
if (gtk_bitset_is_empty (items))
{
gtk_bitset_unref (items);
return;
}
self->pending = items;
if (!self->incremental)
{
gtk_filter_list_model_run_filter (self, G_MAXUINT);
g_assert (self->pending == NULL);
return;
}
g_assert (self->pending_cb == 0);
self->pending_cb = g_idle_add (gtk_filter_list_model_run_filter_cb, self);
g_source_set_name_by_id (self->pending_cb, "[gtk] gtk_filter_list_model_run_filter_cb");
}
static void
@ -215,7 +270,7 @@ gtk_filter_list_model_items_changed_cb (GListModel *model,
guint added,
GtkFilterListModel *self)
{
guint filter_position, filter_removed, filter_added;
guint filter_removed, filter_added;
switch (self->strictness)
{
@ -239,12 +294,21 @@ gtk_filter_list_model_items_changed_cb (GListModel *model,
filter_removed = 0;
gtk_bitset_slice (self->matches, position, removed, added);
if (self->pending)
gtk_bitset_slice (self->pending, position, removed, added);
filter_position = gtk_bitset_get_size_in_range (self->matches, 0, position);
filter_added = gtk_filter_list_model_add_items (self, position, added);
if (added > 0)
{
gtk_filter_list_model_start_filtering (self, gtk_bitset_new_range (position, added));
filter_added = gtk_bitset_get_size_in_range (self->matches, position, position + added - 1);
}
else
filter_added = 0;
if (filter_removed > 0 || filter_added > 0)
g_list_model_items_changed (G_LIST_MODEL (self), filter_position, filter_removed, filter_added);
g_list_model_items_changed (G_LIST_MODEL (self),
position > 0 ? gtk_bitset_get_size_in_range (self->matches, 0, position - 1) : 0,
filter_removed, filter_added);
}
static void
@ -261,6 +325,10 @@ gtk_filter_list_model_set_property (GObject *object,
gtk_filter_list_model_set_filter (self, g_value_get_object (value));
break;
case PROP_INCREMENTAL:
gtk_filter_list_model_set_incremental (self, g_value_get_boolean (value));
break;
case PROP_MODEL:
gtk_filter_list_model_set_model (self, g_value_get_object (value));
break;
@ -285,6 +353,10 @@ gtk_filter_list_model_get_property (GObject *object,
g_value_set_object (value, self->filter);
break;
case PROP_INCREMENTAL:
g_value_set_boolean (value, self->incremental);
break;
case PROP_MODEL:
g_value_set_object (value, self->model);
break;
@ -301,6 +373,7 @@ gtk_filter_list_model_clear_model (GtkFilterListModel *self)
if (self->model == NULL)
return;
gtk_filter_list_model_stop_filtering (self);
g_signal_handlers_disconnect_by_func (self->model, gtk_filter_list_model_items_changed_cb, self);
g_clear_object (&self->model);
if (self->matches)
@ -329,6 +402,7 @@ gtk_filter_list_model_refilter (GtkFilterListModel *self,
guint n_before = g_list_model_get_n_items (G_LIST_MODEL (self));
g_clear_pointer (&self->matches, gtk_bitset_unref);
self->strictness = new_strictness;
gtk_filter_list_model_stop_filtering (self);
if (n_before > 0)
g_list_model_items_changed (G_LIST_MODEL (self), 0, n_before, 0);
}
@ -349,6 +423,7 @@ gtk_filter_list_model_refilter (GtkFilterListModel *self,
{
guint start, end, n_before, n_after;
gtk_filter_list_model_stop_filtering (self);
self->strictness = new_strictness;
n_after = g_list_model_get_n_items (G_LIST_MODEL (self));
start = gtk_bitset_get_minimum (self->matches);
@ -361,9 +436,9 @@ gtk_filter_list_model_refilter (GtkFilterListModel *self,
}
else
{
GtkBitset *inverse = gtk_bitset_new_empty ();
GtkBitset *inverse;
gtk_bitset_add_range (inverse, 0, n_after);
inverse = gtk_bitset_new_range (0, n_after);
gtk_bitset_subtract (inverse, self->matches);
/* otherwise all items would be visible */
g_assert (!gtk_bitset_is_empty (inverse));
@ -387,15 +462,26 @@ gtk_filter_list_model_refilter (GtkFilterListModel *self,
break;
case GTK_FILTER_MATCH_SOME:
if (self->matches == NULL)
{
self->matches = gtk_bitset_new_empty ();
if (self->strictness == GTK_FILTER_MATCH_ALL)
gtk_bitset_add_range (self->matches, 0, g_list_model_get_n_items (self->model));
}
{
GtkBitset *old;
if (self->matches == NULL)
{
if (self->strictness == GTK_FILTER_MATCH_ALL)
old = gtk_bitset_new_range (0, g_list_model_get_n_items (self->model));
else
old = gtk_bitset_new_empty ();
}
else
{
old = self->matches;
}
self->matches = gtk_bitset_new_empty ();
self->strictness = new_strictness;
gtk_filter_list_model_start_filtering (self, gtk_bitset_new_range (0, g_list_model_get_n_items (self->model)));
self->strictness = new_strictness;
gtk_filter_list_model_run_filter (self);
gtk_filter_list_model_emit_items_changed_for_changes (self, old);
}
}
}
@ -450,6 +536,18 @@ gtk_filter_list_model_class_init (GtkFilterListModelClass *class)
GTK_TYPE_FILTER,
GTK_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkFilterListModel:incremental:
*
* If the model should filter items incrementally
*/
properties[PROP_INCREMENTAL] =
g_param_spec_boolean ("incremental",
P_("Incremental"),
P_("Filer items incrementally"),
FALSE,
GTK_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkFilterListModel:model:
*
@ -588,9 +686,14 @@ gtk_filter_list_model_set_model (GtkFilterListModel *self,
added = 0;
}
else if (self->matches)
added = gtk_filter_list_model_add_items (self, 0, g_list_model_get_n_items (model));
{
gtk_filter_list_model_start_filtering (self, gtk_bitset_new_range (0, g_list_model_get_n_items (model)));
added = gtk_bitset_get_size (self->matches);
}
else
added = g_list_model_get_n_items (model);
{
added = g_list_model_get_n_items (model);
}
}
else
{
@ -620,3 +723,63 @@ gtk_filter_list_model_get_model (GtkFilterListModel *self)
return self->model;
}
/**
* gtk_filter_list_model_set_incremental:
* @self: a #GtkFilterListModel
* @incremental: %TRUE to enable incremental filtering
*
* When incremental filtering is enabled, the filterlistmodel will not run
* filters immediately, but will instead queue an idle handler that
* incrementally filters the items and adds them to the list. This of course
* means that items are not instantly added to the list, but only appear
* incrementally.
*
* When your filter blocks the UI while filtering, you might consider
* turning this on. Depending on your model and filters, this may become
* interesting around 10,000 to 100,000 items.
*
* By default, incremental filtering is disabled.
**/
void
gtk_filter_list_model_set_incremental (GtkFilterListModel *self,
gboolean incremental)
{
g_return_if_fail (GTK_IS_FILTER_LIST_MODEL (self));
if (self->incremental == incremental)
return;
self->incremental = incremental;
if (!incremental)
{
GtkBitset *old;
gtk_filter_list_model_run_filter (self, G_MAXUINT);
old = gtk_bitset_copy (self->matches);
gtk_filter_list_model_run_filter (self, 512);
gtk_filter_list_model_stop_filtering (self);
gtk_filter_list_model_emit_items_changed_for_changes (self, old);
}
g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_INCREMENTAL]);
}
/**
* gtk_filter_list_model_get_incremental:
* @self: a #GtkFilterListModel
*
* Returns whether incremental filtering was enabled via
* gtk_filter_list_model_set_incremental().
*
* Returns: %TRUE if incremental filtering is enabled
**/
gboolean
gtk_filter_list_model_get_incremental (GtkFilterListModel *self)
{
g_return_val_if_fail (GTK_IS_FILTER_LIST_MODEL (self), FALSE);
return self->incremental;
}

6
gtk/gtkfilterlistmodel.h
View File

@ -50,6 +50,12 @@ void gtk_filter_list_model_set_model (GtkFilterListMo
GListModel *model);
GDK_AVAILABLE_IN_ALL
GListModel * gtk_filter_list_model_get_model (GtkFilterListModel *self);
GDK_AVAILABLE_IN_ALL
void gtk_filter_list_model_set_incremental (GtkFilterListModel *self,
gboolean incremental);
GDK_AVAILABLE_IN_ALL
gboolean gtk_filter_list_model_get_incremental (GtkFilterListModel *self);
G_END_DECLS