+++ /dev/null
-/*
- * Copyright © 2019 Red Hat, Inc.
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library. If not, see <http://www.gnu.org/licenses/>.
- *
- * Authors: Matthias Clasen <mclasen@redhat.com>
- */
-
-#include "config.h"
-
-#include "gtksearchlistmodel.h"
-
-#include "gtkintl.h"
-#include "gtkselectionmodel.h"
-
-/**
- * SECTION:gtksearchlistmodel
- * @Short_description: A selection model that allows incremental searching
- * @Title: GtkSearchListModel
- * @see_also: #GtkSelectionModel
- *
- * GtkSearchListModel is an implementation of the #GtkSelectionModel interface
- * that allows selecting a single element. The selected element can be determined
- * interactively via a filter.
- */
-struct _GtkSearchListModel
-{
- GObject parent_instance;
-
- GListModel *model;
- guint selected;
- gpointer selected_item;
-
- GtkFilter *filter;
-};
-
-struct _GtkSearchListModelClass
-{
- GObjectClass parent_class;
-};
-
-enum {
- PROP_0,
- PROP_MODEL,
- PROP_FILTER,
- PROP_SELECTED,
- PROP_SELECTED_ITEM,
-
- N_PROPS
-};
-
-static GParamSpec *properties[N_PROPS] = { NULL, };
-
-static GType
-gtk_search_list_model_get_item_type (GListModel *list)
-{
- GtkSearchListModel *self = GTK_SEARCH_LIST_MODEL (list);
-
- return g_list_model_get_item_type (self->model);
-}
-
-static guint
-gtk_search_list_model_get_n_items (GListModel *list)
-{
- GtkSearchListModel *self = GTK_SEARCH_LIST_MODEL (list);
-
- return g_list_model_get_n_items (self->model);
-}
-
-static gpointer
-gtk_search_list_model_get_item (GListModel *list,
- guint position)
-{
- GtkSearchListModel *self = GTK_SEARCH_LIST_MODEL (list);
-
- return g_list_model_get_item (self->model, position);
-}
-
-static void
-gtk_search_list_model_list_model_init (GListModelInterface *iface)
-{
- iface->get_item_type = gtk_search_list_model_get_item_type;
- iface->get_n_items = gtk_search_list_model_get_n_items;
- iface->get_item = gtk_search_list_model_get_item;
-}
-
-static gboolean
-gtk_search_list_model_is_selected (GtkSelectionModel *model,
- guint position)
-{
- GtkSearchListModel *self = GTK_SEARCH_LIST_MODEL (model);
-
- return self->selected == position;
-}
-
-static void
-gtk_search_list_model_query_range (GtkSelectionModel *model,
- guint position,
- guint *start_range,
- guint *n_range,
- gboolean *selected)
-{
- GtkSearchListModel *self = GTK_SEARCH_LIST_MODEL (model);
- guint n_items;
-
- n_items = g_list_model_get_n_items (self->model);
-
- if (position >= n_items)
- {
- *start_range = position;
- *n_range = 0;
- *selected = FALSE;
- }
- else if (self->selected == GTK_INVALID_LIST_POSITION)
- {
- *start_range = 0;
- *n_range = n_items;
- *selected = FALSE;
- }
- else if (position < self->selected)
- {
- *start_range = 0;
- *n_range = self->selected;
- *selected = FALSE;
- }
- else if (position > self->selected)
- {
- *start_range = self->selected + 1;
- *n_range = n_items - *start_range;
- *selected = FALSE;
- }
- else
- {
- *start_range = self->selected;
- *n_range = 1;
- *selected = TRUE;
- }
-}
-
-static void
-gtk_search_list_model_selection_model_init (GtkSelectionModelInterface *iface)
-{
- iface->is_selected = gtk_search_list_model_is_selected;
- iface->query_range = gtk_search_list_model_query_range;
-}
-
-G_DEFINE_TYPE_EXTENDED (GtkSearchListModel, gtk_search_list_model, G_TYPE_OBJECT, 0,
- G_IMPLEMENT_INTERFACE (G_TYPE_LIST_MODEL,
- gtk_search_list_model_list_model_init)
- G_IMPLEMENT_INTERFACE (GTK_TYPE_SELECTION_MODEL,
- gtk_search_list_model_selection_model_init))
-
-static void
-gtk_search_list_model_items_changed_cb (GListModel *model,
- guint position,
- guint removed,
- guint added,
- GtkSearchListModel *self)
-{
- g_object_freeze_notify (G_OBJECT (self));
-
- if (self->selected_item == NULL)
- {
- /* nothing to do */
- }
- else if (self->selected < position)
- {
- /* unchanged */
- }
- else if (self->selected >= position + removed)
- {
- self->selected += added - removed;
- g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_SELECTED]);
- g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_SELECTED_ITEM]);
- }
- else
- {
- guint i;
-
- for (i = 0; i < added; i++)
- {
- gpointer item = g_list_model_get_item (model, position + i);
- if (item == self->selected_item)
- {
- /* the item moved */
- //TODO refilter
- if (self->selected != position + i)
- {
- self->selected = position + i;
- g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_SELECTED]);
- g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_SELECTED_ITEM]);
- }
- break;
- }
- }
- if (i == added)
- {
- /* the item really was deleted */
- g_clear_object (&self->selected_item);
- self->selected = GTK_INVALID_LIST_POSITION;
- //TODO refilter
- g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_SELECTED]);
- g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_SELECTED_ITEM]);
- }
- }
-
- g_list_model_items_changed (G_LIST_MODEL (self), position, removed, added);
-
- g_object_thaw_notify (G_OBJECT (self));
-}
-
-static void
-set_selected (GtkSearchListModel *self,
- guint position)
-{
- gpointer new_selected = NULL;
- guint old_position;
-
- if (self->selected == position)
- return;
-
- new_selected = g_list_model_get_item (self->model, position);
-
- if (new_selected == NULL)
- position = GTK_INVALID_LIST_POSITION;
-
- if (self->selected == position)
- return;
-
- old_position = self->selected;
- self->selected = position;
- g_clear_object (&self->selected_item);
- self->selected_item = new_selected;
-
- if (old_position == GTK_INVALID_LIST_POSITION)
- gtk_selection_model_selection_changed (GTK_SELECTION_MODEL (self), position, 1);
- else if (position == GTK_INVALID_LIST_POSITION)
- gtk_selection_model_selection_changed (GTK_SELECTION_MODEL (self), old_position, 1);
- else if (position < old_position)
- gtk_selection_model_selection_changed (GTK_SELECTION_MODEL (self), position, old_position - position + 1);
- else
- gtk_selection_model_selection_changed (GTK_SELECTION_MODEL (self), old_position, position - old_position + 1);
-
- g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_SELECTED]);
- g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_SELECTED_ITEM]);
-}
-
-static gboolean
-match_item (GtkSearchListModel *self,
- guint position)
-{
- gpointer item;
- gboolean result;
-
- item = g_list_model_get_item (self->model, position);
- result = gtk_filter_match (self->filter, item);
- g_object_unref (item);
-
- return result;
-}
-
-static guint
-find_next_match (GtkSearchListModel *self,
- guint position,
- gboolean forward)
-{
- guint i;
-
- if (position == GTK_INVALID_LIST_POSITION)
- position = 0;
-
- g_print ("search %s from %u\n", forward ? "forward" : "backward", position);
- if (forward)
- for (i = position; i < g_list_model_get_n_items (self->model); i++)
- {
- if (match_item (self, i))
- return i;
- }
- else
- for (i = position; ; i--)
- {
- if (match_item (self, i))
- return i;
- if (i == 0)
- break;
- }
-
- return GTK_INVALID_LIST_POSITION;
-}
-
-static void
-gtk_search_list_model_filter_changed_cb (GtkFilter *filter,
- GtkFilterChange change,
- GtkSearchListModel *self)
-{
- guint position;
-
-g_print ("filter changed: change %d, strictness %d\n", change, gtk_filter_get_strictness (self->filter));
-
- if (gtk_filter_get_strictness (self->filter) == GTK_FILTER_MATCH_NONE)
- position = GTK_INVALID_LIST_POSITION;
- else
- switch (change)
- {
- case GTK_FILTER_CHANGE_DIFFERENT:
- case GTK_FILTER_CHANGE_LESS_STRICT:
- position = find_next_match (self, 0, TRUE);
- break;
- case GTK_FILTER_CHANGE_MORE_STRICT:
- position = find_next_match (self, self->selected, TRUE);
- break;
- default:
- g_assert_not_reached ();
- }
-
- g_print ("select %u\n", position);
- set_selected (self, position);
-}
-
-static void
-gtk_search_list_model_clear_model (GtkSearchListModel *self)
-{
- if (self->model == NULL)
- return;
-
- g_signal_handlers_disconnect_by_func (self->model,
- gtk_search_list_model_items_changed_cb,
- self);
- g_clear_object (&self->model);
-}
-
-static void
-gtk_search_list_model_clear_filter (GtkSearchListModel *self)
-{
- if (self->filter == NULL)
- return;
-
- g_signal_handlers_disconnect_by_func (self->filter,
- gtk_search_list_model_filter_changed_cb,
- self);
-
- g_clear_object (&self->filter);
-}
-
-static void
-gtk_search_list_model_set_property (GObject *object,
- guint prop_id,
- const GValue *value,
- GParamSpec *pspec)
-
-{
- GtkSearchListModel *self = GTK_SEARCH_LIST_MODEL (object);
-
- switch (prop_id)
- {
- case PROP_MODEL:
- self->model = g_value_dup_object (value);
- g_signal_connect (self->model, "items-changed",
- G_CALLBACK (gtk_search_list_model_items_changed_cb), self);
- break;
-
- case PROP_FILTER:
- self->filter = g_value_dup_object (value);
- g_signal_connect (self->filter, "changed",
- G_CALLBACK (gtk_search_list_model_filter_changed_cb), self);
- break;
-
- default:
- G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
- break;
- }
-}
-
-static void
-gtk_search_list_model_get_property (GObject *object,
- guint prop_id,
- GValue *value,
- GParamSpec *pspec)
-{
- GtkSearchListModel *self = GTK_SEARCH_LIST_MODEL (object);
-
- switch (prop_id)
- {
- case PROP_MODEL:
- g_value_set_object (value, self->model);
- break;
-
- case PROP_FILTER:
- g_value_set_object (value, self->filter);
- break;
-
- case PROP_SELECTED:
- g_value_set_uint (value, self->selected);
- break;
-
- case PROP_SELECTED_ITEM:
- g_value_set_object (value, self->selected_item);
- break;
-
- default:
- G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
- break;
- }
-}
-
-static void
-gtk_search_list_model_dispose (GObject *object)
-{
- GtkSearchListModel *self = GTK_SEARCH_LIST_MODEL (object);
-
- gtk_search_list_model_clear_model (self);
- gtk_search_list_model_clear_filter (self);
-
- self->selected = GTK_INVALID_LIST_POSITION;
- g_clear_object (&self->selected_item);
-
- G_OBJECT_CLASS (gtk_search_list_model_parent_class)->dispose (object);
-}
-
-static void
-gtk_search_list_model_class_init (GtkSearchListModelClass *klass)
-{
- GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
-
- gobject_class->get_property = gtk_search_list_model_get_property;
- gobject_class->set_property = gtk_search_list_model_set_property;
- gobject_class->dispose = gtk_search_list_model_dispose;
-
- /**
- * GtkSearchListModel:selected:
- *
- * Position of the selected item
- */
- properties[PROP_SELECTED] =
- g_param_spec_uint ("selected",
- P_("Selected"),
- P_("Position of the selected item"),
- 0, G_MAXUINT, GTK_INVALID_LIST_POSITION,
- G_PARAM_READABLE | G_PARAM_EXPLICIT_NOTIFY | G_PARAM_STATIC_STRINGS);
-
- /**
- * GtkSearchListModel:selected-item:
- *
- * The selected item
- */
- properties[PROP_SELECTED_ITEM] =
- g_param_spec_object ("selected-item",
- P_("Selected Item"),
- P_("The selected item"),
- G_TYPE_OBJECT,
- G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
-
- /**
- * GtkSearchListModel:model:
- *
- * The model being managed
- */
- properties[PROP_MODEL] =
- g_param_spec_object ("model",
- P_("The model"),
- P_("The model being managed"),
- G_TYPE_LIST_MODEL,
- G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS);
-
- /**
- * GtkSearchListModel:filter:
- *
- * The filter determining the selected item
- */
- properties[PROP_FILTER] =
- g_param_spec_object ("filter",
- P_("The filter"),
- P_("The filter being used"),
- GTK_TYPE_FILTER,
- G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS);
-
- g_object_class_install_properties (gobject_class, N_PROPS, properties);
-}
-
-static void
-gtk_search_list_model_init (GtkSearchListModel *self)
-{
- self->selected = GTK_INVALID_LIST_POSITION;
-}
-
-/**
- * gtk_search_list_model_new:
- * @model: (transfer none): the #GListModel to manage
- * @filter: (transfer none): the #GtkFilter to use
- *
- * Creates a new selection to handle @model.
- *
- * Returns: (transfer full) (type GtkSearchListModel): a new #GtkSearchListModel
- **/
-GtkSearchListModel *
-gtk_search_list_model_new (GListModel *model,
- GtkFilter *filter)
-{
- g_return_val_if_fail (G_IS_LIST_MODEL (model), NULL);
-
- return g_object_new (GTK_TYPE_SEARCH_LIST_MODEL,
- "model", model,
- "filter", filter,
- NULL);
-}
-
-gboolean
-gtk_search_list_model_next_match (GtkSearchListModel *self)
-{
- guint position;
-
- position = find_next_match (self, self->selected, TRUE);
- if (position == GTK_INVALID_LIST_POSITION)
- return FALSE;
-
- set_selected (self, position);
-
- return TRUE;
-}
-
-gboolean
-gtk_search_list_model_previous_match (GtkSearchListModel *self)
-{
- guint position;
-
- position = find_next_match (self, self->selected, FALSE);
- if (position == GTK_INVALID_LIST_POSITION)
- return FALSE;
-
- set_selected (self, position);
-
- return TRUE;
-}
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