mirror of
https://gitlab.gnome.org/GNOME/gtk.git
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96e1b85c2c
If set to TRUE, does not call the free func for the removed items. This can be used to move items between arrays without having to do the refcounting dance.
442 lines
12 KiB
C
442 lines
12 KiB
C
/*
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* Copyright © 2019 Matthias Clasen
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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* Authors: Matthias Clasen <mclasen@redhat.com>
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*/
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#include "config.h"
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#include "gtkmultisorter.h"
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#include "gtkbuildable.h"
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#include "gtkintl.h"
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#include "gtksorterprivate.h"
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#include "gtktypebuiltins.h"
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#define GDK_ARRAY_TYPE_NAME GtkSorters
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#define GDK_ARRAY_NAME gtk_sorters
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#define GDK_ARRAY_ELEMENT_TYPE GtkSorter *
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#define GDK_ARRAY_FREE_FUNC g_object_unref
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#include "gdk/gdkarrayimpl.c"
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/**
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* SECTION:gtkmultisorter
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* @Title: GtkMultiSorter
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* @Short_description: Combining multiple sorters
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*
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* GtkMultiSorter combines multiple sorters by trying them
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* in turn. If the first sorter compares two items as equal,
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* the second is tried next, and so on.
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*/
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struct _GtkMultiSorter
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{
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GtkSorter parent_instance;
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GtkSorters sorters;
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};
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typedef struct _GtkMultiSortKey GtkMultiSortKey;
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typedef struct _GtkMultiSortKeys GtkMultiSortKeys;
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struct _GtkMultiSortKey
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{
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gsize offset;
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GtkSortKeys *keys;
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};
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struct _GtkMultiSortKeys
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{
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GtkSortKeys parent_keys;
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guint n_keys;
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GtkMultiSortKey keys[];
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};
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static void
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gtk_multi_sort_keys_free (GtkSortKeys *keys)
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{
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GtkMultiSortKeys *self = (GtkMultiSortKeys *) keys;
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gsize i;
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for (i = 0; i < self->n_keys; i++)
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gtk_sort_keys_unref (self->keys[i].keys);
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g_slice_free1 (sizeof (GtkMultiSortKeys) + self->n_keys * sizeof (GtkMultiSortKey), self);
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}
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static int
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gtk_multi_sort_keys_compare (gconstpointer a,
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gconstpointer b,
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gpointer data)
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{
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GtkMultiSortKeys *self = (GtkMultiSortKeys *) data;
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gsize i;
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for (i = 0; i < self->n_keys; i++)
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{
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GtkOrdering result = gtk_sort_keys_compare (self->keys[i].keys,
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((const char *) a) + self->keys[i].offset,
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((const char *) b) + self->keys[i].offset);
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if (result != GTK_ORDERING_EQUAL)
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return result;
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}
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return GTK_ORDERING_EQUAL;
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}
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static gboolean
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gtk_multi_sort_keys_is_compatible (GtkSortKeys *keys,
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GtkSortKeys *other)
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{
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GtkMultiSortKeys *self = (GtkMultiSortKeys *) keys;
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GtkMultiSortKeys *compare = (GtkMultiSortKeys *) other;
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gsize i;
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if (keys->klass != other->klass)
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return FALSE;
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if (self->n_keys != compare->n_keys)
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return FALSE;
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for (i = 0; i < self->n_keys; i++)
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{
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if (!gtk_sort_keys_is_compatible (self->keys[i].keys, compare->keys[i].keys))
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return FALSE;
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}
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return TRUE;
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}
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static void
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gtk_multi_sort_keys_init_key (GtkSortKeys *keys,
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gpointer item,
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gpointer key_memory)
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{
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GtkMultiSortKeys *self = (GtkMultiSortKeys *) keys;
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char *key = (char *) key_memory;
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gsize i;
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for (i = 0; i < self->n_keys; i++)
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gtk_sort_keys_init_key (self->keys[i].keys, item, key + self->keys[i].offset);
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}
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static void
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gtk_multi_sort_keys_clear_key (GtkSortKeys *keys,
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gpointer key_memory)
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{
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GtkMultiSortKeys *self = (GtkMultiSortKeys *) keys;
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char *key = (char *) key_memory;
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gsize i;
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for (i = 0; i < self->n_keys; i++)
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gtk_sort_keys_clear_key (self->keys[i].keys, key + self->keys[i].offset);
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}
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static const GtkSortKeysClass GTK_MULTI_SORT_KEYS_CLASS =
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{
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gtk_multi_sort_keys_free,
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gtk_multi_sort_keys_compare,
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gtk_multi_sort_keys_is_compatible,
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gtk_multi_sort_keys_init_key,
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gtk_multi_sort_keys_clear_key,
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};
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static GtkSortKeys *
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gtk_multi_sort_keys_new (GtkMultiSorter *self)
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{
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GtkMultiSortKeys *result;
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GtkSortKeys *keys;
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gsize i;
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if (gtk_sorters_get_size (&self->sorters) == 0)
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return gtk_sort_keys_new_equal ();
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else if (gtk_sorters_get_size (&self->sorters) == 1)
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return gtk_sorter_get_keys (gtk_sorters_get (&self->sorters, 0));
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keys = gtk_sort_keys_alloc (>K_MULTI_SORT_KEYS_CLASS,
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sizeof (GtkMultiSortKeys) + gtk_sorters_get_size (&self->sorters) * sizeof (GtkMultiSortKey),
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0, 1);
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result = (GtkMultiSortKeys *) keys;
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result->n_keys = gtk_sorters_get_size (&self->sorters);
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for (i = 0; i < result->n_keys; i++)
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{
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result->keys[i].keys = gtk_sorter_get_keys (gtk_sorters_get (&self->sorters, i));
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result->keys[i].offset = GTK_SORT_KEYS_ALIGN (keys->key_size, gtk_sort_keys_get_key_align (result->keys[i].keys));
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keys->key_size = result->keys[i].offset + gtk_sort_keys_get_key_size (result->keys[i].keys);
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keys->key_align = MAX (keys->key_align, gtk_sort_keys_get_key_align (result->keys[i].keys));
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}
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return keys;
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}
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static GType
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gtk_multi_sorter_get_item_type (GListModel *list)
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{
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return GTK_TYPE_SORTER;
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}
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static guint
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gtk_multi_sorter_get_n_items (GListModel *list)
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{
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GtkMultiSorter *self = GTK_MULTI_SORTER (list);
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return gtk_sorters_get_size (&self->sorters);
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}
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static gpointer
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gtk_multi_sorter_get_item (GListModel *list,
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guint position)
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{
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GtkMultiSorter *self = GTK_MULTI_SORTER (list);
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if (position < gtk_sorters_get_size (&self->sorters))
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return g_object_ref (gtk_sorters_get (&self->sorters, position));
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else
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return NULL;
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}
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static void
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gtk_multi_sorter_list_model_init (GListModelInterface *iface)
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{
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iface->get_item_type = gtk_multi_sorter_get_item_type;
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iface->get_n_items = gtk_multi_sorter_get_n_items;
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iface->get_item = gtk_multi_sorter_get_item;
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}
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static GtkBuildableIface *parent_buildable_iface;
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static void
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gtk_multi_sorter_buildable_add_child (GtkBuildable *buildable,
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GtkBuilder *builder,
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GObject *child,
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const char *type)
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{
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if (GTK_IS_SORTER (child))
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gtk_multi_sorter_append (GTK_MULTI_SORTER (buildable), g_object_ref (GTK_SORTER (child)));
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else
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parent_buildable_iface->add_child (buildable, builder, child, type);
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}
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static void
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gtk_multi_sorter_buildable_init (GtkBuildableIface *iface)
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{
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parent_buildable_iface = g_type_interface_peek_parent (iface);
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iface->add_child = gtk_multi_sorter_buildable_add_child;
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}
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G_DEFINE_TYPE_WITH_CODE (GtkMultiSorter, gtk_multi_sorter, GTK_TYPE_SORTER,
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G_IMPLEMENT_INTERFACE (G_TYPE_LIST_MODEL, gtk_multi_sorter_list_model_init)
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G_IMPLEMENT_INTERFACE (GTK_TYPE_BUILDABLE, gtk_multi_sorter_buildable_init))
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static GtkOrdering
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gtk_multi_sorter_compare (GtkSorter *sorter,
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gpointer item1,
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gpointer item2)
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{
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GtkMultiSorter *self = GTK_MULTI_SORTER (sorter);
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GtkOrdering result = GTK_ORDERING_EQUAL;
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guint i;
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for (i = 0; i < gtk_sorters_get_size (&self->sorters); i++)
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{
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GtkSorter *child = gtk_sorters_get (&self->sorters, i);
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result = gtk_sorter_compare (child, item1, item2);
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if (result != GTK_ORDERING_EQUAL)
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break;
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}
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return result;
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}
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static GtkSorterOrder
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gtk_multi_sorter_get_order (GtkSorter *sorter)
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{
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GtkMultiSorter *self = GTK_MULTI_SORTER (sorter);
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GtkSorterOrder result = GTK_SORTER_ORDER_NONE;
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guint i;
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for (i = 0; i < gtk_sorters_get_size (&self->sorters); i++)
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{
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GtkSorter *child = gtk_sorters_get (&self->sorters, i);
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GtkSorterOrder child_order;
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child_order = gtk_sorter_get_order (child);
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switch (child_order)
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{
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case GTK_SORTER_ORDER_PARTIAL:
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result = GTK_SORTER_ORDER_PARTIAL;
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break;
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case GTK_SORTER_ORDER_NONE:
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break;
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case GTK_SORTER_ORDER_TOTAL:
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return GTK_SORTER_ORDER_TOTAL;
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default:
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g_assert_not_reached ();
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break;
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}
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}
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return result;
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}
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static void
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gtk_multi_sorter_changed_cb (GtkSorter *sorter,
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GtkSorterChange change,
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GtkMultiSorter *self)
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{
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/* Using an enum on purpose, so gcc complains about this case if
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* new values are added to the enum
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*/
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switch (change)
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{
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case GTK_SORTER_CHANGE_INVERTED:
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/* This could do a lot better with change handling, in particular in
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* cases where self->n_sorters == 1 or if sorter == self->sorters[0]
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*/
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change = GTK_SORTER_CHANGE_DIFFERENT;
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break;
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case GTK_SORTER_CHANGE_DIFFERENT:
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case GTK_SORTER_CHANGE_LESS_STRICT:
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case GTK_SORTER_CHANGE_MORE_STRICT:
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break;
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default:
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g_assert_not_reached ();
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change = GTK_SORTER_CHANGE_DIFFERENT;
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}
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gtk_sorter_changed_with_keys (GTK_SORTER (self),
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change,
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gtk_multi_sort_keys_new (self));
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}
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static void
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gtk_multi_sorter_dispose (GObject *object)
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{
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GtkMultiSorter *self = GTK_MULTI_SORTER (object);
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guint i;
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for (i = 0; i < gtk_sorters_get_size (&self->sorters); i++)
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{
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GtkSorter *sorter = gtk_sorters_get (&self->sorters, i);
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g_signal_handlers_disconnect_by_func (sorter, gtk_multi_sorter_changed_cb, self);
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}
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gtk_sorters_clear (&self->sorters);
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G_OBJECT_CLASS (gtk_multi_sorter_parent_class)->dispose (object);
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}
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static void
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gtk_multi_sorter_class_init (GtkMultiSorterClass *class)
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{
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GtkSorterClass *sorter_class = GTK_SORTER_CLASS (class);
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GObjectClass *object_class = G_OBJECT_CLASS (class);
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sorter_class->compare = gtk_multi_sorter_compare;
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sorter_class->get_order = gtk_multi_sorter_get_order;
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object_class->dispose = gtk_multi_sorter_dispose;
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}
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static void
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gtk_multi_sorter_init (GtkMultiSorter *self)
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{
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gtk_sorters_init (&self->sorters);
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gtk_sorter_changed_with_keys (GTK_SORTER (self),
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GTK_SORTER_CHANGE_DIFFERENT,
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gtk_multi_sort_keys_new (self));
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}
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/**
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* gtk_multi_sorter_new:
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*
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* Creates a new multi sorter.
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*
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* This sorter compares items by trying each of the sorters
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* in turn, until one returns non-zero. In particular, if
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* no sorter has been added to it, it will always compare
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* items as equal.
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*
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* Returns: a new #GtkMultiSorter
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*/
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GtkMultiSorter *
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gtk_multi_sorter_new (void)
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{
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return g_object_new (GTK_TYPE_MULTI_SORTER, NULL);
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}
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/**
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* gtk_multi_sorter_append:
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* @self: a #GtkMultiSorter
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* @sorter: (transfer full): a sorter to add
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*
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* Add @sorter to @self to use for sorting at the end. @self
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* will consult all existing sorters before it will sort with
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* the given @sorter.
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*/
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void
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gtk_multi_sorter_append (GtkMultiSorter *self,
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GtkSorter *sorter)
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{
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g_return_if_fail (GTK_IS_MULTI_SORTER (self));
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g_return_if_fail (GTK_IS_SORTER (sorter));
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g_signal_connect (sorter, "changed", G_CALLBACK (gtk_multi_sorter_changed_cb), self);
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gtk_sorters_append (&self->sorters, sorter);
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gtk_sorter_changed_with_keys (GTK_SORTER (self),
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GTK_SORTER_CHANGE_MORE_STRICT,
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gtk_multi_sort_keys_new (self));
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}
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/**
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* gtk_multi_sorter_remove:
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* @self: a #GtkMultiSorter
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* @position: position of sorter to remove
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*
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* Removes the sorter at the given @position from the list of sorter
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* used by @self.
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*
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* If @position is larger than the number of sorters, nothing happens.
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*/
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void
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gtk_multi_sorter_remove (GtkMultiSorter *self,
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guint position)
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{
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guint length;
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GtkSorter *sorter;
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g_return_if_fail (GTK_IS_MULTI_SORTER (self));
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length = gtk_sorters_get_size (&self->sorters);
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if (position >= length)
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return;
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sorter = gtk_sorters_get (&self->sorters, position);
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g_signal_handlers_disconnect_by_func (sorter, gtk_multi_sorter_changed_cb, self);
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gtk_sorters_splice (&self->sorters, position, 1, FALSE, NULL, 0);
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gtk_sorter_changed_with_keys (GTK_SORTER (self),
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GTK_SORTER_CHANGE_LESS_STRICT,
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gtk_multi_sort_keys_new (self));
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}
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