From 54f626c14f9d6e1b3fca154d2d02facac4d3d212 Mon Sep 17 00:00:00 2001
From: Paul Beckingham <paul@beckingham.net>
Date: Wed, 27 Apr 2016 22:27:24 -0400
Subject: [PATCH] Timeline: Described ::untracked

---
 src/Timeline.cpp | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/src/Timeline.cpp b/src/Timeline.cpp
index e71decd0..9098c482 100644
--- a/src/Timeline.cpp
+++ b/src/Timeline.cpp
@@ -111,12 +111,16 @@ std::vector <Interval> Timeline::tracked (Rules& rules) const
 // Untracked time is that which is not excluded, and not filled. Gaps.
 std::vector <Interval> Timeline::untracked (Rules& rules) const
 {
-  std::vector <Interval> combined;
+  std::vector <Interval> gaps;
 
-  // TODO Combine _inclusions and _exclusions to yield a set of collapsed
-  //      unracked intervals.
+  // Get the set of expanded exclusions that overlap the range defined by the
+  // timeline. If no range is defined, derive it from the set of all data.
+  auto exclusions = excluded (rules);
 
-  return combined;
+  // TODO subtract all exclusions
+  // TODO subtract all inclusions
+
+  return gaps;
 }
 
 ////////////////////////////////////////////////////////////////////////////////