Profile context menu entry to split a dive

Allow the user to manually split a dive in two.

Signed-off-by: Robert C. Helling <helling@atdotde.de>

core/dive.c

@@ -3441,6 +3441,10 @@ static int split_dive_at(struct dive *dive, int a, int b)
 	if ((nr = get_divenr(dive)) < 0)
 		return 0;
 
+	/* Splitting should leave at least 3 samples per dive */
+	if (a < 3 || b > dive->dc.samples - 4)
+		return 0;
+
 	/* We're not trying to be efficient here.. */
 	d1 = create_new_copy(dive);
 	d2 = create_new_copy(dive);
@@ -3583,6 +3587,22 @@ int split_dive(struct dive *dive)
 	return 0;
 }
 
+void split_dive_at_time(struct dive *dive, duration_t time)
+{
+	int i = 0;
+	struct sample *sample = dive->dc.sample;
+
+	if (!dive)
+		return;
+	while(sample->time.seconds < time.seconds) {
+		++sample;
+		++i;
+		if (dive->dc.samples == i)
+			return;
+	}
+	split_dive_at(dive, i, i - 1);
+}
+
 /*
  * "dc_maxtime()" is how much total time this dive computer
  * has for this dive. Note that it can differ from "duration"

core/dive.h

@@ -761,6 +761,7 @@ extern int dive_getUniqID(struct dive *d);
 extern unsigned int dc_airtemp(struct divecomputer *dc);
 extern unsigned int dc_watertemp(struct divecomputer *dc);
 extern int split_dive(struct dive *);
+extern void split_dive_at_time(struct dive *dive, duration_t time);
 extern struct dive *merge_dives(struct dive *a, struct dive *b, int offset, bool prefer_downloaded);
 extern struct dive *try_to_merge(struct dive *a, struct dive *b, bool prefer_downloaded);
 extern struct event *clone_event(const struct event *src_ev);

profile-widget/profilewidget2.cpp

@@ -21,6 +21,7 @@
 #include "desktop-widgets/diveplanner.h"
 #include "desktop-widgets/simplewidgets.h"
 #include "desktop-widgets/divepicturewidget.h"
+#include "desktop-widgets/mainwindow.h"
 #include "core/qthelper.h"
 #include "core/gettextfromc.h"
 #endif
@@ -1427,6 +1428,8 @@ void ProfileWidget2::contextMenuEvent(QContextMenuEvent *event)
 	setpointAction->setData(event->globalPos());
 	QAction *action = m.addAction(tr("Add bookmark"), this, SLOT(addBookmark()));
 	action->setData(event->globalPos());
+	QAction *splitAction = m.addAction(tr("Split dive into two"), this, SLOT(splitDive()));
+	splitAction->setData(event->globalPos());
 	struct event *ev = NULL;
 	enum divemode_t divemode = UNDEF_COMP_TYPE;
 	QPointF scenePos = mapToScene(mapFromGlobal(event->globalPos()));
@@ -1640,6 +1643,20 @@ void ProfileWidget2::addSetpointChange()
 	SetpointDialog::instance()->show();
 }
 
+void ProfileWidget2::splitDive()
+{
+	QAction *action = qobject_cast<QAction *>(sender());
+	QPointF scenePos = mapToScene(mapFromGlobal(action->data().toPoint()));
+	duration_t time;
+	time.seconds = lrint(timeAxis->valueAt((scenePos)));
+	split_dive_at_time(&displayed_dive, time);
+	emit updateDiveInfo(false);
+	mark_divelist_changed(true);
+	replot();
+	MainWindow::instance()->refreshProfile();
+	MainWindow::instance()->refreshDisplay();
+}
+
 void ProfileWidget2::changeGas()
 {
 	QAction *action = qobject_cast<QAction *>(sender());

profile-widget/profilewidget2.h

@@ -115,6 +115,7 @@ slots: // Necessary to call from QAction's signals.
 	void setAddState();
 	void changeGas();
 	void addSetpointChange();
+	void splitDive();
 	void addBookmark();
 	void addDivemodeSwitch();
 	void hideEvents();