forked from AuroraMiddleware/gtk
274 lines
8.0 KiB
C
274 lines
8.0 KiB
C
/* gtkaccessibleattributeset.c: Accessible attribute content
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*
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* Copyright 2020 GNOME Foundation
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*
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* SPDX-License-Identifier: LGPL-2.1-or-later
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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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#include "config.h"
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#include "gtkaccessibleattributesetprivate.h"
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#include "gtkbitmaskprivate.h"
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#include "gtkenums.h"
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struct _GtkAccessibleAttributeSet
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{
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gsize n_attributes;
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GtkAccessibleAttributeNameFunc name_func;
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GtkAccessibleAttributeDefaultFunc default_func;
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GtkBitmask *attributes_set;
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GtkAccessibleValue **attribute_values;
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};
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static GtkAccessibleAttributeSet *
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gtk_accessible_attribute_set_init (GtkAccessibleAttributeSet *self,
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gsize n_attributes,
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GtkAccessibleAttributeNameFunc name_func,
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GtkAccessibleAttributeDefaultFunc default_func)
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{
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self->n_attributes = n_attributes;
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self->name_func = name_func;
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self->default_func = default_func;
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self->attribute_values = g_new (GtkAccessibleValue *, n_attributes);
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self->attributes_set = _gtk_bitmask_new ();
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/* Initialize all attribute values, so we can always get the full attribute */
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for (int i = 0; i < self->n_attributes; i++)
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self->attribute_values[i] = (* self->default_func) (i);
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return self;
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}
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GtkAccessibleAttributeSet *
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gtk_accessible_attribute_set_new (gsize n_attributes,
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GtkAccessibleAttributeNameFunc name_func,
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GtkAccessibleAttributeDefaultFunc default_func)
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{
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GtkAccessibleAttributeSet *set = g_rc_box_new0 (GtkAccessibleAttributeSet);
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return gtk_accessible_attribute_set_init (set, n_attributes, name_func, default_func);
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}
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GtkAccessibleAttributeSet *
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gtk_accessible_attribute_set_ref (GtkAccessibleAttributeSet *self)
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{
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g_return_val_if_fail (self != NULL, NULL);
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return g_rc_box_acquire (self);
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}
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static void
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gtk_accessible_attribute_set_free (gpointer data)
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{
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GtkAccessibleAttributeSet *self = data;
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for (int i = 0; i < self->n_attributes; i++)
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{
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if (self->attribute_values[i] != NULL)
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gtk_accessible_value_unref (self->attribute_values[i]);
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}
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g_free (self->attribute_values);
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_gtk_bitmask_free (self->attributes_set);
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}
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void
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gtk_accessible_attribute_set_unref (GtkAccessibleAttributeSet *self)
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{
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g_rc_box_release_full (self, gtk_accessible_attribute_set_free);
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}
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/*< private >
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* gtk_accessible_attribute_set_add:
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* @self: a `GtkAccessibleAttributeSet`
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* @attribute: the attribute to set
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* @value: (nullable): a `GtkAccessibleValue`
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*
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* Adds @attribute to the attributes set, and sets its value.
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*
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* If @value is %NULL, the @attribute is reset to its default value.
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*
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* If you want to remove @attribute from the set, use gtk_accessible_attribute_set_remove()
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* instead.
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*
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* Returns: %TRUE if the set was modified, and %FALSE otherwise
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*/
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gboolean
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gtk_accessible_attribute_set_add (GtkAccessibleAttributeSet *self,
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int attribute,
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GtkAccessibleValue *value)
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{
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g_return_val_if_fail (attribute >= 0 && attribute < self->n_attributes, FALSE);
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if (value != NULL)
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{
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if (gtk_accessible_value_equal (value, self->attribute_values[attribute]))
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return FALSE;
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}
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else
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{
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if (!_gtk_bitmask_get (self->attributes_set, attribute))
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return FALSE;
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}
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g_clear_pointer (&(self->attribute_values[attribute]), gtk_accessible_value_unref);
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if (value != NULL)
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self->attribute_values[attribute] = gtk_accessible_value_ref (value);
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else
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self->attribute_values[attribute] = (* self->default_func) (attribute);
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self->attributes_set = _gtk_bitmask_set (self->attributes_set, attribute, TRUE);
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return TRUE;
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}
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/*< private >
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* gtk_accessible_attribute_set_remove:
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* @self: a `GtkAccessibleAttributeSet`
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* @attribute: the attribute to be removed
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*
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* Resets the @attribute in the given `GtkAccessibleAttributeSet`
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* to its default value.
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*
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* Returns: %TRUE if the set was modified, and %FALSE otherwise
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*/
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gboolean
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gtk_accessible_attribute_set_remove (GtkAccessibleAttributeSet *self,
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int attribute)
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{
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g_return_val_if_fail (attribute >= 0 && attribute < self->n_attributes, FALSE);
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if (!_gtk_bitmask_get (self->attributes_set, attribute))
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return FALSE;
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g_clear_pointer (&(self->attribute_values[attribute]), gtk_accessible_value_unref);
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self->attribute_values[attribute] = (* self->default_func) (attribute);
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self->attributes_set = _gtk_bitmask_set (self->attributes_set, attribute, FALSE);
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return TRUE;
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}
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gboolean
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gtk_accessible_attribute_set_contains (GtkAccessibleAttributeSet *self,
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int attribute)
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{
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g_return_val_if_fail (attribute >= 0 && attribute < self->n_attributes, FALSE);
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return _gtk_bitmask_get (self->attributes_set, attribute);
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}
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/*< private >
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* gtk_accessible_attribute_set_get_value:
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* @self: a `GtkAccessibleAttributeSet`
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* @attribute: the attribute to retrieve
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*
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* Retrieves the value of the given @attribute in the set.
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*
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* Returns: (transfer none): the value for the attribute
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*/
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GtkAccessibleValue *
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gtk_accessible_attribute_set_get_value (GtkAccessibleAttributeSet *self,
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int attribute)
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{
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g_return_val_if_fail (attribute >= 0 && attribute < self->n_attributes, NULL);
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return self->attribute_values[attribute];
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}
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gsize
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gtk_accessible_attribute_set_get_length (GtkAccessibleAttributeSet *self)
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{
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return self->n_attributes;
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}
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guint
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gtk_accessible_attribute_set_get_changed (GtkAccessibleAttributeSet *self)
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{
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guint changed = 0;
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for (gsize i = 0; i < self->n_attributes; i++)
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{
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if (gtk_accessible_attribute_set_contains (self, i))
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changed |= (1 << i);
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}
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return changed;
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}
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/*< private >
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* gtk_accessible_attribute_set_print:
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* @self: a `GtkAccessibleAttributeSet`
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* @only_set: %TRUE if only the set attributes should be printed
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* @buffer: a `GString`
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*
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* Prints the contents of the `GtkAccessibleAttributeSet` into @buffer.
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*/
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void
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gtk_accessible_attribute_set_print (GtkAccessibleAttributeSet *self,
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gboolean only_set,
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GString *buffer)
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{
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if (only_set && _gtk_bitmask_is_empty (self->attributes_set))
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{
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g_string_append (buffer, "{}");
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return;
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}
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g_string_append (buffer, "{\n");
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for (gsize i = 0; i < self->n_attributes; i++)
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{
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if (only_set && !_gtk_bitmask_get (self->attributes_set, i))
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continue;
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g_string_append (buffer, " ");
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g_string_append (buffer, self->name_func (i));
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g_string_append (buffer, ": ");
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gtk_accessible_value_print (self->attribute_values[i], buffer);
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g_string_append (buffer, ",\n");
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}
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g_string_append (buffer, "}");
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}
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/*< private >
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* gtk_accessible_attribute_set_to_string:
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* @self: a `GtkAccessibleAttributeSet`
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*
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* Prints the contents of a `GtkAccessibleAttributeSet` into a string.
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*
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* Returns: (transfer full): a newly allocated string with the contents
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* of the `GtkAccessibleAttributeSet`
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*/
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char *
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gtk_accessible_attribute_set_to_string (GtkAccessibleAttributeSet *self)
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{
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GString *buf = g_string_new (NULL);
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gtk_accessible_attribute_set_print (self, TRUE, buf);
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return g_string_free (buf, FALSE);
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}
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