[PATCH] planning: Add option to have last stop at 6m/20ft

[Anton Lundin]

When diving in areas where there are risk of boats passing above you,
its common practise to do the last stop at 6m to better stay out of
harms way. When doing o2-deco, it doesn't matter for the deco time if
you are doing all the time at 6m, due to that you don't have any inert
gas in your breathing gas.

Signed-off-by: Anton Lundin <glance at acc.umu.se>
---
 planner.c |   26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/planner.c b/planner.c
index 68f4448..6e279b8 100644
--- a/planner.c
+++ b/planner.c
@@ -677,6 +677,12 @@ void plan(struct diveplan *diveplan, char **cached_datap, struct dive **divep)
 		record_dive(dive);
 	}
 	while (stopidx > 0) { /* this indicates that we aren't surfacing directly */
+		/* if we are in a double-step, eg, when 3m/10ft stop is disabled,
+		 * just skip the first stop at that depth */
+		if (stoplevels[stopidx] == stoplevels[stopidx - 1]) {
+			stopidx--;
+			continue;
+		}
 		if (gi >= 0 && stoplevels[stopidx] == gaschanges[gi].depth) {
 			o2 = dive->cylinder[gaschanges[gi].gasidx].gasmix.o2.permille;
 			he = dive->cylinder[gaschanges[gi].gasidx].gasmix.he.permille;
@@ -1191,6 +1197,16 @@ static gboolean gf_focus_out_cb(GtkWidget *entry, GdkEvent * event, gpointer dat
 	return FALSE;
 }
 
+static gboolean last_stop_toggled_cb(GtkWidget *entry, GdkEvent * event, gpointer data)
+{
+	if (gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(entry)) == TRUE)
+		decostoplevels[1] = 6000;
+	else
+		decostoplevels[1] = 3000;
+	show_planned_dive();
+	return FALSE;
+}
+
 static GtkWidget *add_gas_combobox_to_box(GtkWidget *box, const char *label, int idx)
 {
 	GtkWidget *frame, *combo;
@@ -1319,6 +1335,16 @@ void input_plan()
 	add_entry_with_callback(hbox, 12, _("Dive starts when?"), "+60:00", starttime_focus_out_cb, NULL);
 	add_entry_with_callback(hbox, 12, _("Surface Pressure (mbar)"), SURFACE_PRESSURE_STRING, surfpres_focus_out_cb, NULL);
 
+	if (get_units()->length == METERS)
+		labeltext = _("Last stop at 6 Meters");
+	else
+		labeltext = _("Last stop at 20 Feet");
+
+	content = gtk_check_button_new_with_label(labeltext);
+	gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(content), 0);
+	gtk_box_pack_start(GTK_BOX(hbox), content, FALSE, FALSE, 6);
+	g_signal_connect(G_OBJECT(content), "toggled", G_CALLBACK(last_stop_toggled_cb), NULL);
+
 	hbox = gtk_hbox_new(FALSE, 0);
 	gtk_box_pack_start(GTK_BOX(vbox), hbox, TRUE, TRUE, 0);
 	if (get_units()->volume == CUFT) {
-- 
1.7.10.4