more refactoring and timeline rewriting

timeline/selection.cpp

@@ -0,0 +1,67 @@
+#include "selection.h"
+
+Selection::Selection(long in, long out, Track *track) :
+  in_(in),
+  out_(out),
+  track_(track),
+  old_in_(in),
+  old_out_(out),
+  old_track_(track)
+{
+}
+
+long Selection::in() const
+{
+  return in_;
+}
+
+long Selection::out() const
+{
+  return out_;
+}
+
+Track *Selection::track() const
+{
+  return track_;
+}
+
+void Selection::set_in(long in)
+{
+  in_ = in;
+}
+
+void Selection::set_out(long out)
+{
+  out_ = out;
+}
+
+void Selection::Tidy(QVector<Selection &> selections)
+{
+  for (int i=0;i<selections.size();i++) {
+      Selection& s = selections[i];
+      for (int j=0;j<selections.size();j++) {
+        if (i != j) {
+          Selection& ss = selections[j];
+          if (s.track() == ss.track()) {
+            bool remove = false;
+            if (s.in() < ss.in() && s.out() > ss.out()) {
+              // do nothing
+            } else if (s.in() >= ss.in() && s.out() <= ss.out()) {
+              remove = true;
+            } else if (s.in() <= ss.out() && s.out() > ss.out()) {
+              ss.out = s.out();
+              remove = true;
+            } else if (s.out() >= ss.in() && s.in() < ss.in()) {
+              ss.in = s.in();
+              remove = true;
+            }
+            if (remove) {
+              selections.removeAt(i);
+              i--;
+              break;
+            }
+          }
+        }
+      }
+  }
+}