timelinepoints: implemented saving/loading into project files

app/timeline/timelinemarker.cpp

@@ -1,5 +1,7 @@
 #include "timelinemarker.h"
 
+#include "common/xmlutils.h"
+
 TimelineMarker::TimelineMarker(const TimeRange &time, const QString &name, QObject *parent) :
   QObject(parent),
   time_(time),
@@ -29,6 +31,24 @@ void TimelineMarker::set_name(const QString &name)
   emit NameChanged(name_);
 }
 
+void TimelineMarkerList::Save(QXmlStreamWriter *writer) const
+{
+  writer->writeStartElement(QStringLiteral("markers"));
+
+  foreach (TimelineMarker* marker, markers_) {
+    writer->writeStartElement(QStringLiteral("marker"));
+
+    writer->writeAttribute(QStringLiteral("name"), marker->name());
+
+    writer->writeAttribute(QStringLiteral("in"), marker->time().in().toString());
+    writer->writeAttribute(QStringLiteral("out"), marker->time().out().toString());
+
+    writer->writeEndElement(); // marker
+  }
+
+  writer->writeEndElement(); // markers
+}
+
 TimelineMarkerList::~TimelineMarkerList()
 {
   qDeleteAll(markers_);
@@ -59,3 +79,25 @@ const QList<TimelineMarker*> &TimelineMarkerList::list() const
 {
   return markers_;
 }
+
+void TimelineMarkerList::Load(QXmlStreamReader *reader)
+{
+  while (XMLReadNextStartElement(reader)) {
+    if (reader->name() == QStringLiteral("marker")) {
+      QString name;
+      TimeRange range;
+
+      XMLAttributeLoop(reader, attr) {
+        if (attr.name() == QStringLiteral("name")) {
+          name = attr.value().toString();
+        } else if (attr.name() == QStringLiteral("in")) {
+          range.set_in(rational::fromString(attr.value().toString()));
+        } else if (attr.name() == QStringLiteral("out")) {
+          range.set_out(rational::fromString(attr.value().toString()));
+        }
+      }
+    }
+
+    reader->skipCurrentElement();
+  }
+}