libsysprof-gtk: add new SysprofTimeSeries

This is to replace what is in libsysprof-analyze currently, so we can do
charting in a more flexible manner.

src/libsysprof-gtk/sysprof-time-series-item.c

@@ -0,0 +1,142 @@
+/* sysprof-time-series-item.c
+ *
+ * Copyright 2023 Christian Hergert <chergert@redhat.com>
+ *
+ * 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/>.
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+#include "config.h"
+
+#include "sysprof-time-series-item-private.h"
+
+struct _SysprofTimeSeriesItem
+{
+  GObject parent_instance;
+  GtkExpression *time_expression;
+  GtkExpression *duration_expression;
+  GObject *item;
+};
+
+enum {
+  PROP_0,
+  PROP_ITEM,
+  N_PROPS
+};
+
+G_DEFINE_FINAL_TYPE (SysprofTimeSeriesItem, sysprof_time_series_item, G_TYPE_OBJECT)
+
+static GParamSpec *properties [N_PROPS];
+
+static void
+sysprof_time_series_item_finalize (GObject *object)
+{
+  SysprofTimeSeriesItem *self = (SysprofTimeSeriesItem *)object;
+
+  g_clear_object (&self->item);
+  g_clear_pointer (&self->time_expression, gtk_expression_unref);
+  g_clear_pointer (&self->duration_expression, gtk_expression_unref);
+
+  G_OBJECT_CLASS (sysprof_time_series_item_parent_class)->finalize (object);
+}
+
+static void
+sysprof_time_series_item_get_property (GObject    *object,
+                                       guint       prop_id,
+                                       GValue     *value,
+                                       GParamSpec *pspec)
+{
+  SysprofTimeSeriesItem *self = SYSPROF_TIME_SERIES_ITEM (object);
+
+  switch (prop_id)
+    {
+    case PROP_ITEM:
+      g_value_set_object (value, self->item);
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+    }
+}
+
+static void
+sysprof_time_series_item_class_init (SysprofTimeSeriesItemClass *klass)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
+
+  object_class->finalize = sysprof_time_series_item_finalize;
+  object_class->get_property = sysprof_time_series_item_get_property;
+
+  properties [PROP_ITEM] =
+    g_param_spec_object ("item", NULL, NULL,
+                         G_TYPE_OBJECT,
+                         (G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
+
+  g_object_class_install_properties (object_class, N_PROPS, properties);
+}
+
+static void
+sysprof_time_series_item_init (SysprofTimeSeriesItem *self)
+{
+}
+
+SysprofTimeSeriesItem *
+_sysprof_time_series_item_new (GObject       *item,
+                               GtkExpression *time_expression,
+                               GtkExpression *duration_expression)
+{
+  SysprofTimeSeriesItem *self;
+
+  self = g_object_new (SYSPROF_TYPE_TIME_SERIES_ITEM, NULL);
+  self->item = item;
+  self->time_expression = time_expression;
+  self->duration_expression = duration_expression;
+
+  return self;
+}
+
+/**
+ * sysprof_time_series_item_get_item:
+ * @self: a #SysprofTimeSeriesItem
+ *
+ * Gets the item used to generate X/Y values.
+ *
+ * Returns: (transfer none): a #GObject
+ */
+gpointer
+sysprof_time_series_item_get_item (SysprofTimeSeriesItem *self)
+{
+  g_return_val_if_fail (SYSPROF_IS_TIME_SERIES_ITEM (self), NULL);
+
+  return self->item;
+}
+
+void
+sysprof_time_series_item_get_time_value (SysprofTimeSeriesItem *self,
+                                         GValue                *time_value)
+{
+  g_return_if_fail (SYSPROF_IS_TIME_SERIES_ITEM (self));
+
+  gtk_expression_evaluate (self->time_expression, self->item, time_value);
+}
+
+void
+sysprof_time_series_item_get_duration_value (SysprofTimeSeriesItem *self,
+                                             GValue                *duration_value)
+{
+  g_return_if_fail (SYSPROF_IS_TIME_SERIES_ITEM (self));
+
+  gtk_expression_evaluate (self->duration_expression, self->item, duration_value);
+}