527 lines
15 KiB
C
527 lines
15 KiB
C
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/*
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* Copyright © 2019 Red Hat, Inc.
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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 "gtkmultiselection.h"
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#include "gtkbitset.h"
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#include "gtksectionmodelprivate.h"
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#include "gtkselectionmodel.h"
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/**
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* GtkMultiSelection:
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*
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* `GtkMultiSelection` is a `GtkSelectionModel` that allows selecting multiple
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* elements.
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*/
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struct _GtkMultiSelection
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{
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GObject parent_instance;
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GListModel *model;
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GtkBitset *selected;
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GHashTable *items; /* item => position */
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};
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struct _GtkMultiSelectionClass
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{
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GObjectClass parent_class;
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};
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enum {
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PROP_0,
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PROP_ITEM_TYPE,
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PROP_MODEL,
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PROP_N_ITEMS,
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N_PROPS,
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};
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static GParamSpec *properties[N_PROPS] = { NULL, };
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static GType
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gtk_multi_selection_get_item_type (GListModel *list)
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{
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return G_TYPE_OBJECT;
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}
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static guint
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gtk_multi_selection_get_n_items (GListModel *list)
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{
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GtkMultiSelection *self = GTK_MULTI_SELECTION (list);
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if (self->model == NULL)
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return 0;
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return g_list_model_get_n_items (self->model);
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}
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static gpointer
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gtk_multi_selection_get_item (GListModel *list,
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guint position)
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{
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GtkMultiSelection *self = GTK_MULTI_SELECTION (list);
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if (self->model == NULL)
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return NULL;
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return g_list_model_get_item (self->model, position);
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}
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static void
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gtk_multi_selection_list_model_init (GListModelInterface *iface)
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{
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iface->get_item_type = gtk_multi_selection_get_item_type;
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iface->get_n_items = gtk_multi_selection_get_n_items;
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iface->get_item = gtk_multi_selection_get_item;
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}
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static void
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gtk_multi_selection_get_section (GtkSectionModel *model,
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guint position,
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guint *out_start,
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guint *out_end)
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{
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GtkMultiSelection *self = GTK_MULTI_SELECTION (model);
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gtk_list_model_get_section (self->model, position, out_start, out_end);
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}
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static void
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gtk_multi_selection_section_model_init (GtkSectionModelInterface *iface)
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{
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iface->get_section = gtk_multi_selection_get_section;
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}
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static gboolean
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gtk_multi_selection_is_selected (GtkSelectionModel *model,
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guint position)
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{
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GtkMultiSelection *self = GTK_MULTI_SELECTION (model);
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return gtk_bitset_contains (self->selected, position);
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}
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static GtkBitset *
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gtk_multi_selection_get_selection_in_range (GtkSelectionModel *model,
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guint pos,
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guint n_items)
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{
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GtkMultiSelection *self = GTK_MULTI_SELECTION (model);
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return gtk_bitset_ref (self->selected);
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}
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static void
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gtk_multi_selection_toggle_selection (GtkMultiSelection *self,
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GtkBitset *changes)
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{
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GListModel *model = G_LIST_MODEL (self);
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GtkBitsetIter change_iter, selected_iter;
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GtkBitset *selected;
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guint change_pos, selected_pos;
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gboolean more;
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gtk_bitset_difference (self->selected, changes);
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selected = gtk_bitset_copy (changes);
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gtk_bitset_intersect (selected, self->selected);
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if (!gtk_bitset_iter_init_first (&selected_iter, selected, &selected_pos))
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selected_pos = G_MAXUINT;
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for (more = gtk_bitset_iter_init_first (&change_iter, changes, &change_pos);
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more;
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more = gtk_bitset_iter_next (&change_iter, &change_pos))
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{
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gpointer item = g_list_model_get_item (model, change_pos);
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if (change_pos < selected_pos)
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{
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g_hash_table_remove (self->items, item);
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g_object_unref (item);
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}
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else
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{
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g_assert (change_pos == selected_pos);
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g_hash_table_insert (self->items, item, GUINT_TO_POINTER (change_pos));
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if (!gtk_bitset_iter_next (&selected_iter, &selected_pos))
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selected_pos = G_MAXUINT;
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}
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}
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gtk_bitset_unref (selected);
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}
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static gboolean
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gtk_multi_selection_set_selection (GtkSelectionModel *model,
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GtkBitset *selected,
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GtkBitset *mask)
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{
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GtkMultiSelection *self = GTK_MULTI_SELECTION (model);
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GtkBitset *changes;
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guint min, max, n_items;
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/* changes = (self->selected XOR selected) AND mask
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* But doing it this way avoids looking at all values outside the mask
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*/
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changes = gtk_bitset_copy (selected);
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gtk_bitset_difference (changes, self->selected);
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gtk_bitset_intersect (changes, mask);
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min = gtk_bitset_get_minimum (changes);
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max = gtk_bitset_get_maximum (changes);
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/* sanity check */
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n_items = self->model ? g_list_model_get_n_items (self->model) : 0;
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if (max >= n_items)
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{
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gtk_bitset_remove_range_closed (changes, n_items, max);
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max = gtk_bitset_get_maximum (changes);
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}
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/* actually do the change */
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gtk_multi_selection_toggle_selection (self, changes);
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gtk_bitset_unref (changes);
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if (min <= max)
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gtk_selection_model_selection_changed (model, min, max - min + 1);
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return TRUE;
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}
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static void
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gtk_multi_selection_selection_model_init (GtkSelectionModelInterface *iface)
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{
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iface->is_selected = gtk_multi_selection_is_selected;
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iface->get_selection_in_range = gtk_multi_selection_get_selection_in_range;
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iface->set_selection = gtk_multi_selection_set_selection;
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}
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G_DEFINE_TYPE_EXTENDED (GtkMultiSelection, gtk_multi_selection, G_TYPE_OBJECT, 0,
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G_IMPLEMENT_INTERFACE (G_TYPE_LIST_MODEL,
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gtk_multi_selection_list_model_init)
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G_IMPLEMENT_INTERFACE (GTK_TYPE_SECTION_MODEL,
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gtk_multi_selection_section_model_init)
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G_IMPLEMENT_INTERFACE (GTK_TYPE_SELECTION_MODEL,
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gtk_multi_selection_selection_model_init))
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static void
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gtk_multi_selection_items_changed_cb (GListModel *model,
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guint position,
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guint removed,
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guint added,
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GtkMultiSelection *self)
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{
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GHashTableIter iter;
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gpointer item, pos_pointer;
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GHashTable *pending = NULL;
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guint i;
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gtk_bitset_splice (self->selected, position, removed, added);
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g_hash_table_iter_init (&iter, self->items);
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while (g_hash_table_iter_next (&iter, &item, &pos_pointer))
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{
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guint pos = GPOINTER_TO_UINT (pos_pointer);
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if (pos < position)
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continue;
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else if (pos >= position + removed)
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g_hash_table_iter_replace (&iter, GUINT_TO_POINTER (pos - removed + added));
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else /* if pos is in the removed range */
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{
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if (added == 0)
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{
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g_hash_table_iter_remove (&iter);
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}
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else
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{
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g_hash_table_iter_steal (&iter);
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if (pending == NULL)
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pending = g_hash_table_new_full (NULL, NULL, g_object_unref, NULL);
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g_hash_table_add (pending, item);
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}
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}
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}
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for (i = position; pending != NULL && i < position + added; i++)
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{
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item = g_list_model_get_item (model, i);
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if (g_hash_table_contains (pending, item))
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{
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gtk_bitset_add (self->selected, i);
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g_hash_table_insert (self->items, item, GUINT_TO_POINTER (i));
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g_hash_table_remove (pending, item);
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if (g_hash_table_size (pending) == 0)
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g_clear_pointer (&pending, g_hash_table_unref);
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}
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else
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{
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g_object_unref (item);
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}
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}
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g_clear_pointer (&pending, g_hash_table_unref);
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g_list_model_items_changed (G_LIST_MODEL (self), position, removed, added);
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if (removed != added)
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g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_N_ITEMS]);
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}
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static void
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gtk_multi_selection_sections_changed_cb (GtkSectionModel *model,
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unsigned int position,
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unsigned int n_items,
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gpointer user_data)
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{
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GtkMultiSelection *self = GTK_MULTI_SELECTION (user_data);
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gtk_section_model_sections_changed (GTK_SECTION_MODEL (self), position, n_items);
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}
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static void
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gtk_multi_selection_clear_model (GtkMultiSelection *self)
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{
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if (self->model == NULL)
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return;
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g_signal_handlers_disconnect_by_func (self->model,
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gtk_multi_selection_items_changed_cb,
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self);
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g_signal_handlers_disconnect_by_func (self->model,
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gtk_multi_selection_sections_changed_cb,
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self);
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g_clear_object (&self->model);
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}
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static void
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gtk_multi_selection_set_property (GObject *object,
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guint prop_id,
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const GValue *value,
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GParamSpec *pspec)
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{
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GtkMultiSelection *self = GTK_MULTI_SELECTION (object);
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switch (prop_id)
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{
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case PROP_MODEL:
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gtk_multi_selection_set_model (self, g_value_get_object (value));
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gtk_multi_selection_get_property (GObject *object,
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guint prop_id,
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GValue *value,
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GParamSpec *pspec)
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{
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GtkMultiSelection *self = GTK_MULTI_SELECTION (object);
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switch (prop_id)
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{
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case PROP_ITEM_TYPE:
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g_value_set_gtype (value, gtk_multi_selection_get_item_type (G_LIST_MODEL (self)));
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break;
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case PROP_MODEL:
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g_value_set_object (value, self->model);
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break;
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case PROP_N_ITEMS:
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g_value_set_uint (value, gtk_multi_selection_get_n_items (G_LIST_MODEL (self)));
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gtk_multi_selection_dispose (GObject *object)
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{
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GtkMultiSelection *self = GTK_MULTI_SELECTION (object);
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gtk_multi_selection_clear_model (self);
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g_clear_pointer (&self->selected, gtk_bitset_unref);
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g_clear_pointer (&self->items, g_hash_table_unref);
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G_OBJECT_CLASS (gtk_multi_selection_parent_class)->dispose (object);
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}
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static void
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gtk_multi_selection_class_init (GtkMultiSelectionClass *klass)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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gobject_class->get_property = gtk_multi_selection_get_property;
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gobject_class->set_property = gtk_multi_selection_set_property;
|
||
|
|
gobject_class->dispose = gtk_multi_selection_dispose;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* GtkMultiSelection:item-type:
|
||
|
|
*
|
||
|
|
* The type of items. See [method@Gio.ListModel.get_item_type].
|
||
|
|
*
|
||
|
|
* Since: 4.8
|
||
|
|
**/
|
||
|
|
properties[PROP_ITEM_TYPE] =
|
||
|
|
g_param_spec_gtype ("item-type", NULL, NULL,
|
||
|
|
G_TYPE_OBJECT,
|
||
|
|
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* GtkMultiSelection:model: (attributes org.gtk.Property.get=gtk_multi_selection_get_model org.gtk.Property.set=gtk_multi_selection_set_model)
|
||
|
|
*
|
||
|
|
* The list managed by this selection.
|
||
|
|
*/
|
||
|
|
properties[PROP_MODEL] =
|
||
|
|
g_param_spec_object ("model", NULL, NULL,
|
||
|
|
G_TYPE_LIST_MODEL,
|
||
|
|
G_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY | G_PARAM_STATIC_STRINGS);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* GtkMultiSelection:n-items:
|
||
|
|
*
|
||
|
|
* The number of items. See [method@Gio.ListModel.get_n_items].
|
||
|
|
*
|
||
|
|
* Since: 4.8
|
||
|
|
**/
|
||
|
|
properties[PROP_N_ITEMS] =
|
||
|
|
g_param_spec_uint ("n-items", NULL, NULL,
|
||
|
|
0, G_MAXUINT, 0,
|
||
|
|
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
|
||
|
|
|
||
|
|
g_object_class_install_properties (gobject_class, N_PROPS, properties);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
gtk_multi_selection_init (GtkMultiSelection *self)
|
||
|
|
{
|
||
|
|
self->selected = gtk_bitset_new_empty ();
|
||
|
|
self->items = g_hash_table_new_full (NULL, NULL, g_object_unref, NULL);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* gtk_multi_selection_new:
|
||
|
|
* @model: (nullable) (transfer full): the `GListModel` to manage
|
||
|
|
*
|
||
|
|
* Creates a new selection to handle @model.
|
||
|
|
*
|
||
|
|
* Returns: (transfer full): a new `GtkMultiSelection`
|
||
|
|
*/
|
||
|
|
GtkMultiSelection *
|
||
|
|
gtk_multi_selection_new (GListModel *model)
|
||
|
|
{
|
||
|
|
GtkMultiSelection *self;
|
||
|
|
|
||
|
|
g_return_val_if_fail (model == NULL || G_IS_LIST_MODEL (model), NULL);
|
||
|
|
|
||
|
|
self = g_object_new (GTK_TYPE_MULTI_SELECTION,
|
||
|
|
"model", model,
|
||
|
|
NULL);
|
||
|
|
|
||
|
|
/* consume the reference */
|
||
|
|
g_clear_object (&model);
|
||
|
|
|
||
|
|
return self;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* gtk_multi_selection_get_model: (attributes org.gtk.Method.get_property=model)
|
||
|
|
* @self: a `GtkMultiSelection`
|
||
|
|
*
|
||
|
|
* Returns the underlying model of @self.
|
||
|
|
*
|
||
|
|
* Returns: (transfer none) (nullable): the underlying model
|
||
|
|
*/
|
||
|
|
GListModel *
|
||
|
|
gtk_multi_selection_get_model (GtkMultiSelection *self)
|
||
|
|
{
|
||
|
|
g_return_val_if_fail (GTK_IS_MULTI_SELECTION (self), NULL);
|
||
|
|
|
||
|
|
return self->model;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* gtk_multi_selection_set_model: (attributes org.gtk.Method.set_property=model)
|
||
|
|
* @self: a `GtkMultiSelection`
|
||
|
|
* @model: (nullable): A `GListModel` to wrap
|
||
|
|
*
|
||
|
|
* Sets the model that @self should wrap.
|
||
|
|
*
|
||
|
|
* If @model is %NULL, @self will be empty.
|
||
|
|
*/
|
||
|
|
void
|
||
|
|
gtk_multi_selection_set_model (GtkMultiSelection *self,
|
||
|
|
GListModel *model)
|
||
|
|
{
|
||
|
|
guint n_items_before;
|
||
|
|
|
||
|
|
g_return_if_fail (GTK_IS_MULTI_SELECTION (self));
|
||
|
|
g_return_if_fail (model == NULL || G_IS_LIST_MODEL (model));
|
||
|
|
|
||
|
|
if (self->model == model)
|
||
|
|
return;
|
||
|
|
|
||
|
|
n_items_before = self->model ? g_list_model_get_n_items (self->model) : 0;
|
||
|
|
gtk_multi_selection_clear_model (self);
|
||
|
|
|
||
|
|
if (model)
|
||
|
|
{
|
||
|
|
self->model = g_object_ref (model);
|
||
|
|
g_signal_connect (self->model,
|
||
|
|
"items-changed",
|
||
|
|
G_CALLBACK (gtk_multi_selection_items_changed_cb),
|
||
|
|
self);
|
||
|
|
if (GTK_IS_SECTION_MODEL (self->model))
|
||
|
|
g_signal_connect (self->model, "sections-changed",
|
||
|
|
G_CALLBACK (gtk_multi_selection_sections_changed_cb), self);
|
||
|
|
gtk_multi_selection_items_changed_cb (self->model,
|
||
|
|
0,
|
||
|
|
n_items_before,
|
||
|
|
g_list_model_get_n_items (model),
|
||
|
|
self);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
gtk_bitset_remove_all (self->selected);
|
||
|
|
g_hash_table_remove_all (self->items);
|
||
|
|
g_list_model_items_changed (G_LIST_MODEL (self), 0, n_items_before, 0);
|
||
|
|
if (n_items_before)
|
||
|
|
g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_N_ITEMS]);
|
||
|
|
}
|
||
|
|
|
||
|
|
g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_MODEL]);
|
||
|
|
}
|