timelinepoints: implemented saving/loading into project files

app/timeline/timelineworkarea.cpp

@@ -1,5 +1,7 @@
 #include "timelineworkarea.h"
 
+#include "common/xmlutils.h"
+
 const rational TimelineWorkArea::kResetIn = 0;
 const rational TimelineWorkArea::kResetOut = RATIONAL_MAX;
 
@@ -30,6 +32,41 @@ void TimelineWorkArea::set_range(const TimeRange &range)
   emit RangeChanged(workarea_range_);
 }
 
+void TimelineWorkArea::Load(QXmlStreamReader *reader)
+{
+  rational range_in = workarea_range_.in();
+  rational range_out = workarea_range_.out();
+
+  XMLAttributeLoop(reader, attr) {
+    if (attr.name() == QStringLiteral("enabled")) {
+      set_enabled(attr.value() != 0);
+    } else if (attr.name() == QStringLiteral("in")) {
+      range_in = rational::fromString(attr.value().toString());
+    } else if (attr.name() == QStringLiteral("out")) {
+      range_out = rational::fromString(attr.value().toString());
+    }
+  }
+
+  TimeRange loaded_workarea(range_in, range_out);
+
+  if (loaded_workarea != workarea_range_) {
+    set_range(loaded_workarea);
+  }
+
+  reader->skipCurrentElement();
+}
+
+void TimelineWorkArea::Save(QXmlStreamWriter *writer) const
+{
+  writer->writeStartElement(QStringLiteral("workarea"));
+
+  writer->writeAttribute(QStringLiteral("enabled"), QString::number(workarea_enabled_));
+  writer->writeAttribute(QStringLiteral("in"), workarea_range_.in().toString());
+  writer->writeAttribute(QStringLiteral("out"), workarea_range_.out().toString());
+
+  writer->writeEndElement(); // workarea
+}
+
 const rational &TimelineWorkArea::in() const
 {
   return workarea_range_.in();