+/* PSPPIRE - a graphical user interface for PSPP.
+ Copyright (C) 2008 Free Software Foundation
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program 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 General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
+
+#include <config.h>
+#include <string.h>
+#include <stdlib.h>
+
+#include <libpspp/tower.h>
+#include <libpspp/pool.h>
+#include "psppire-axis-hetero.h"
+#include <gtk/gtk.h>
+
+
+/* --- prototypes --- */
+static void psppire_axis_hetero_class_init (PsppireAxisHeteroClass *class);
+static void psppire_axis_hetero_init (PsppireAxisHetero *axis);
+static void psppire_axis_hetero_finalize (GObject *object);
+
+
+/* --- variables --- */
+static GObjectClass *parent_class = NULL;
+
+
+static gint
+get_unit_at_pixel (const PsppireAxis *a, glong pixel)
+{
+ PsppireAxisHetero *ah = PSPPIRE_AXIS_HETERO (a);
+ const struct tower_node *node;
+ unsigned long int node_start;
+
+ if (pixel >= tower_height (&ah->tower))
+ return tower_count (&ah->tower);
+
+ node = tower_lookup (&ah->tower, pixel, &node_start);
+
+ return tower_node_get_index (node);
+}
+
+
+static gint
+unit_count (const PsppireAxis *a)
+{
+ PsppireAxisHetero *ah = PSPPIRE_AXIS_HETERO (a);
+ return tower_count (&ah->tower);
+}
+
+
+static glong
+pixel_start (const PsppireAxis *a, gint unit)
+{
+ PsppireAxisHetero *ah = PSPPIRE_AXIS_HETERO (a);
+ const struct tower_node *node;
+
+ if ( unit >= tower_count (&ah->tower))
+ return tower_height (&ah->tower);
+
+ node = tower_get (&ah->tower, unit);
+
+ return tower_node_get_level (node);
+}
+
+
+static gint
+unit_size (const PsppireAxis *a, gint unit)
+{
+ PsppireAxisHetero *ah = PSPPIRE_AXIS_HETERO (a);
+ const struct tower_node *node;
+ if (unit >= tower_count (&ah->tower))
+ return 0;
+
+ node = tower_get (&ah->tower, unit);
+
+ return tower_node_get_size (node);
+}
+
+
+static glong
+total_size (const PsppireAxis *a)
+{
+ glong s;
+ PsppireAxisHetero *ah = PSPPIRE_AXIS_HETERO (a);
+
+ s = tower_height (&ah->tower);
+ return s;
+}
+
+static void
+psppire_hetero_iface_init (PsppireAxisIface *iface)
+{
+ iface->unit_size = unit_size;
+ iface->unit_count = unit_count;
+ iface->pixel_start = pixel_start;
+ iface->get_unit_at_pixel = get_unit_at_pixel;
+ iface->total_size = total_size;
+}
+
+/* --- functions --- */
+/**
+ * psppire_axis_hetero_get_type:
+ * @returns: the type ID for accelerator groups.
+ */
+GType
+psppire_axis_hetero_get_type (void)
+{
+ static GType object_type = 0;
+
+ if (!object_type)
+ {
+ static const GTypeInfo object_info = {
+ sizeof (PsppireAxisHeteroClass),
+ (GBaseInitFunc) NULL,
+ (GBaseFinalizeFunc) NULL,
+ (GClassInitFunc) psppire_axis_hetero_class_init,
+ NULL, /* class_finalize */
+ NULL, /* class_data */
+ sizeof (PsppireAxisHetero),
+ 0, /* n_preallocs */
+ (GInstanceInitFunc) psppire_axis_hetero_init,
+ };
+
+
+ static const GInterfaceInfo interface_info =
+ {
+ (GInterfaceInitFunc) psppire_hetero_iface_init,
+ NULL,
+ NULL
+ };
+
+ object_type = g_type_register_static (G_TYPE_PSPPIRE_AXIS,
+ "PsppireAxisHetero",
+ &object_info, 0);
+
+ g_type_add_interface_static (object_type,
+ PSPPIRE_TYPE_AXIS_IFACE,
+ &interface_info);
+ }
+
+ return object_type;
+}
+
+static void
+psppire_axis_hetero_class_init (PsppireAxisHeteroClass *class)
+{
+ GObjectClass *object_class = G_OBJECT_CLASS (class);
+ parent_class = g_type_class_peek_parent (class);
+
+ object_class->finalize = psppire_axis_hetero_finalize;
+}
+
+
+static void
+psppire_axis_hetero_init (PsppireAxisHetero *axis)
+{
+ axis->pool = NULL;
+ psppire_axis_hetero_clear (axis);
+}
+
+
+static void
+psppire_axis_hetero_finalize (GObject *object)
+{
+ PsppireAxisHetero *a = PSPPIRE_AXIS_HETERO (object);
+ pool_destroy (a->pool);
+ G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+
+/**
+ * psppire_axis_hetero_new:
+ * @returns: a new #PsppireAxisHetero object
+ *
+ * Creates a new #PsppireAxisHetero.
+ */
+PsppireAxisHetero*
+psppire_axis_hetero_new (void)
+{
+ return g_object_new (G_TYPE_PSPPIRE_AXIS_HETERO, NULL);
+}
+
+
+void
+psppire_axis_hetero_append (PsppireAxisHetero *a, gint size)
+{
+ struct tower_node *new ;
+
+ g_return_if_fail (PSPPIRE_IS_AXIS_HETERO (a));
+
+ new = pool_malloc (a->pool, sizeof *new);
+
+ tower_insert (&a->tower, size, new, NULL);
+}
+
+
+
+/* Insert a new unit of size SIZE before position POSN */
+void
+psppire_axis_hetero_insert (PsppireAxisHetero *a, gint size, gint posn)
+{
+ struct tower_node *new;
+ struct tower_node *before = NULL;
+
+ g_return_if_fail (PSPPIRE_IS_AXIS_HETERO (a));
+
+ new = pool_malloc (a->pool, sizeof *new);
+
+ if ( posn != tower_count (&a->tower))
+ before = tower_get (&a->tower, posn);
+
+ tower_insert (&a->tower, size, new, before);
+}
+
+
+void
+psppire_axis_hetero_remove (PsppireAxisHetero *a, gint posn)
+{
+ struct tower_node *node;
+
+ g_return_if_fail (PSPPIRE_IS_AXIS_HETERO (a));
+
+ node = tower_get (&a->tower, posn);
+
+ tower_delete (&a->tower, node);
+
+ pool_free (a->pool, node);
+}
+
+
+void
+psppire_axis_hetero_resize_unit (PsppireAxisHetero *a, gint size, gint posn)
+{
+ struct tower_node *node;
+
+ g_return_if_fail (PSPPIRE_IS_AXIS_HETERO (a));
+
+ node = tower_get (&a->tower, posn);
+
+ tower_resize (&a->tower, node, size);
+}
+
+
+void
+psppire_axis_hetero_clear (PsppireAxisHetero *a)
+{
+ g_return_if_fail (PSPPIRE_IS_AXIS_HETERO (a));
+
+ pool_destroy (a->pool);
+ a->pool = pool_create ();
+ tower_init (&a->tower);
+}
+
+