Rewrite PSPP output engine.

[pspp-builds.git] / src / output / charts / np-plot.h

diff --git a/src/output/charts/np-plot.h b/src/output/charts/np-plot.h
index c9742359e9091f1ae15900a1c98571f63c5f21c8..82194e2016bd984668b303267751bd8b99365c86 100644 (file)
--- a/src/output/charts/np-plot.h
+++ b/src/output/charts/np-plot.h
@@ -17,12 +17,94 @@
 #ifndef OUTPUT_CHARTS_NP_PLOT_H
 #define OUTPUT_CHARTS_NP_PLOT_H 1
 
-struct casereader;
+#include <output/chart-item.h>
+
 struct np;
 
-struct chart *np_plot_create (const struct np *, const struct casereader *,
-                              const char *label);
-struct chart *dnp_plot_create (const struct np *, const struct casereader *,
-                               const char *label);
+/* An NP or DNP plot. */
+struct np_plot_chart
+  {
+    struct chart_item chart_item;
+    char *label;
+    struct casereader *data;
+    bool detrended;
+
+    /* Copied directly from struct np. */
+    double y_min, y_max;
+    double dns_min, dns_max;
+
+    /* Calculated. */
+    double slope, intercept;
+    double y_first, y_last;
+    double x_lower, x_upper;
+    double slack;
+  };
+
+struct chart_item *np_plot_create (const struct np *,
+                                   const struct casereader *,
+                                   const char *label);
+struct chart_item *dnp_plot_create (const struct np *,
+                                    const struct casereader *,
+                                    const char *label);
+\f
+/* This boilerplate for np_plot_chart, a subclass of chart_item, was
+   autogenerated by mk-class-boilerplate. */
+
+#include <assert.h>
+#include <libpspp/cast.h>
+
+extern const struct chart_item_class np_plot_chart_class;
+
+/* Returns true if SUPER is a np_plot_chart, otherwise false. */
+static inline bool
+is_np_plot_chart (const struct chart_item *super)
+{
+  return super->class == &np_plot_chart_class;
+}
+
+/* Returns SUPER converted to np_plot_chart.  SUPER must be a np_plot_chart, as
+   reported by is_np_plot_chart. */
+static inline struct np_plot_chart *
+to_np_plot_chart (const struct chart_item *super)
+{
+  assert (is_np_plot_chart (super));
+  return UP_CAST (super, struct np_plot_chart, chart_item);
+}
+
+/* Returns INSTANCE converted to chart_item. */
+static inline struct chart_item *
+np_plot_chart_super (const struct np_plot_chart *instance)
+{
+  return CONST_CAST (struct chart_item *, &instance->chart_item);
+}
+
+/* Increments INSTANCE's reference count and returns INSTANCE. */
+static inline struct np_plot_chart *
+np_plot_chart_ref (const struct np_plot_chart *instance)
+{
+  return to_np_plot_chart (chart_item_ref (&instance->chart_item));
+}
+
+/* Decrements INSTANCE's reference count, then destroys INSTANCE if
+   the reference count is now zero. */
+static inline void
+np_plot_chart_unref (struct np_plot_chart *instance)
+{
+  chart_item_unref (&instance->chart_item);
+}
+
+/* Returns true if INSTANCE's reference count is greater than 1,
+   false otherwise. */
+static inline bool
+np_plot_chart_is_shared (const struct np_plot_chart *instance)
+{
+  return chart_item_is_shared (&instance->chart_item);
+}
 
+static inline void
+np_plot_chart_submit (struct np_plot_chart *instance)
+{
+  chart_item_submit (&instance->chart_item);
+}
+\f
 #endif /* output/charts/np-plot.h */