forked from AuroraMiddleware/gtk
296 lines
7.3 KiB
C
296 lines
7.3 KiB
C
/*
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* Copyright © 2020 Benjamin Otte
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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: Benjamin Otte <otte@gnome.org>
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*/
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#include "config.h"
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#include "gtkboolfilter.h"
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#include "gtkintl.h"
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#include "gtktypebuiltins.h"
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/**
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* SECTION:gtkboolfilter
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* @Title: GtkBoolFilter
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* @Short_description: Filtering by boolean expressions
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*
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* GtkBoolFilter is a simple filter that takes a boolean #GtkExpression
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* to determine whether to include items.
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*/
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struct _GtkBoolFilter
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{
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GtkFilter parent_instance;
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gboolean invert;
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GtkExpression *expression;
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};
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enum {
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PROP_0,
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PROP_EXPRESSION,
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PROP_INVERT,
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NUM_PROPERTIES
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};
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G_DEFINE_TYPE (GtkBoolFilter, gtk_bool_filter, GTK_TYPE_FILTER)
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static GParamSpec *properties[NUM_PROPERTIES] = { NULL, };
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static gboolean
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gtk_bool_filter_match (GtkFilter *filter,
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gpointer item)
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{
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GtkBoolFilter *self = GTK_BOOL_FILTER (filter);
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GValue value = G_VALUE_INIT;
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gboolean result;
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if (self->expression == NULL ||
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!gtk_expression_evaluate (self->expression, item, &value))
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return FALSE;
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result = g_value_get_boolean (&value);
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g_value_unset (&value);
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if (self->invert)
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result = !result;
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return result;
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}
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static GtkFilterMatch
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gtk_bool_filter_get_strictness (GtkFilter *filter)
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{
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GtkBoolFilter *self = GTK_BOOL_FILTER (filter);
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if (self->expression == NULL)
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return GTK_FILTER_MATCH_NONE;
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return GTK_FILTER_MATCH_SOME;
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}
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static void
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gtk_bool_filter_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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GtkBoolFilter *self = GTK_BOOL_FILTER (object);
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switch (prop_id)
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{
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case PROP_EXPRESSION:
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gtk_bool_filter_set_expression (self, gtk_value_get_expression (value));
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break;
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case PROP_INVERT:
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gtk_bool_filter_set_invert (self, g_value_get_boolean (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_bool_filter_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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GtkBoolFilter *self = GTK_BOOL_FILTER (object);
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switch (prop_id)
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{
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case PROP_EXPRESSION:
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gtk_value_set_expression (value, self->expression);
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break;
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case PROP_INVERT:
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g_value_set_boolean (value, self->invert);
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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_bool_filter_dispose (GObject *object)
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{
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GtkBoolFilter *self = GTK_BOOL_FILTER (object);
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g_clear_pointer (&self->expression, gtk_expression_unref);
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G_OBJECT_CLASS (gtk_bool_filter_parent_class)->dispose (object);
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}
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static void
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gtk_bool_filter_class_init (GtkBoolFilterClass *class)
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{
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GtkFilterClass *filter_class = GTK_FILTER_CLASS (class);
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GObjectClass *object_class = G_OBJECT_CLASS (class);
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filter_class->match = gtk_bool_filter_match;
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filter_class->get_strictness = gtk_bool_filter_get_strictness;
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object_class->get_property = gtk_bool_filter_get_property;
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object_class->set_property = gtk_bool_filter_set_property;
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object_class->dispose = gtk_bool_filter_dispose;
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/**
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* GtkBoolFilter:expression: (type GtkExpression)
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*
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* The boolean expression to evalute on item
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*/
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properties[PROP_EXPRESSION] =
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gtk_param_spec_expression ("expression",
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P_("Expression"),
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P_("Expression to evaluate"),
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | G_PARAM_EXPLICIT_NOTIFY);
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/**
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* GtkBoolFilter:invert:
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*
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* If the expression result should be inverted
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*/
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properties[PROP_INVERT] =
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g_param_spec_boolean ("invert",
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P_("Invert"),
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P_("If the expression result should be inverted"),
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FALSE,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | G_PARAM_EXPLICIT_NOTIFY);
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g_object_class_install_properties (object_class, NUM_PROPERTIES, properties);
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}
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static void
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gtk_bool_filter_init (GtkBoolFilter *self)
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{
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}
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/**
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* gtk_bool_filter_new:
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* @expression: (transfer full) (nullable): The expression to evaluate
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* or %NULL for none
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*
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* Creates a new bool filter.
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*
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* Returns: a new #GtkBoolFilter
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**/
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GtkFilter *
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gtk_bool_filter_new (GtkExpression *expression)
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{
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GtkFilter *result;
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result = g_object_new (GTK_TYPE_BOOL_FILTER,
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"expression", expression,
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NULL);
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g_clear_pointer (&expression, gtk_expression_unref);
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return result;
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}
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/**
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* gtk_bool_filter_get_expression:
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* @self: a #GtkBoolFilter
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*
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* Gets the expression that the filter uses to evaluate if
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* an item should be filtered.
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*
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* Returns: (transfer none): a #GtkExpression
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*/
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GtkExpression *
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gtk_bool_filter_get_expression (GtkBoolFilter *self)
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{
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g_return_val_if_fail (GTK_IS_BOOL_FILTER (self), NULL);
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return self->expression;
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}
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/**
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* gtk_bool_filter_set_expression:
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* @self: a #GtkBoolFilter
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* @expression: a #GtkExpression
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*
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* Sets the expression that the filter uses to
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* check if items should be filtered. The expression must have
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* a value type of #G_TYPE_BOOLEAN.
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*/
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void
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gtk_bool_filter_set_expression (GtkBoolFilter *self,
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GtkExpression *expression)
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{
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g_return_if_fail (GTK_IS_BOOL_FILTER (self));
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g_return_if_fail (expression == NULL || gtk_expression_get_value_type (expression) == G_TYPE_BOOLEAN);
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if (self->expression == expression)
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return;
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g_clear_pointer (&self->expression, gtk_expression_unref);
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if (expression)
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self->expression = gtk_expression_ref (expression);
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gtk_filter_changed (GTK_FILTER (self), GTK_FILTER_CHANGE_DIFFERENT);
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g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_EXPRESSION]);
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}
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/**
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* gtk_bool_filter_get_invert:
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* @self: a #GtkBoolFilter
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*
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* Returns whether the filter inverts the expression.
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*
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* Returns: %TRUE if the filter inverts
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*/
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gboolean
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gtk_bool_filter_get_invert (GtkBoolFilter *self)
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{
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g_return_val_if_fail (GTK_IS_BOOL_FILTER (self), TRUE);
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return self->invert;
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}
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/**
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* gtk_bool_filter_set_invert:
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* @self: a #GtkBoolFilter
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* @invert: %TRUE to invert
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*
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* Sets whether the filter should invert the expression.
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*/
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void
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gtk_bool_filter_set_invert (GtkBoolFilter *self,
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gboolean invert)
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{
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g_return_if_fail (GTK_IS_BOOL_FILTER (self));
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if (self->invert == invert)
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return;
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self->invert = invert;
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gtk_filter_changed (GTK_FILTER (self), GTK_FILTER_CHANGE_DIFFERENT);
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g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_INVERT]);
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}
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