From ad518b7fb272ec6ccec7e891a3374c648fd531dd Mon Sep 17 00:00:00 2001
From: David Capello <davidcapello@gmail.com>
Date: Tue, 14 Jun 2016 11:14:24 -0300
Subject: [PATCH] Add SelectedFrames::reversed() function

---
 src/doc/selected_frames.h         | 17 +++++++++++++++++
 src/doc/selected_frames_tests.cpp |  6 ++++++
 2 files changed, 23 insertions(+)

diff --git a/src/doc/selected_frames.h b/src/doc/selected_frames.h
index c834e2195..caaa08733 100644
--- a/src/doc/selected_frames.h
+++ b/src/doc/selected_frames.h
@@ -97,6 +97,21 @@ namespace doc {
       mutable frame_t m_frame;
     };
 
+    class Reversed {
+    public:
+      typedef const_reverse_iterator const_iterator;
+
+      const_iterator begin() const { return m_selectedFrames.rbegin(); }
+      const_iterator end() const { return m_selectedFrames.rend(); }
+
+      Reversed(const SelectedFrames& selectedFrames)
+        : m_selectedFrames(selectedFrames) {
+      }
+
+    private:
+      const SelectedFrames& m_selectedFrames;
+    };
+
     const_iterator begin() const { return const_iterator(m_ranges.begin()); }
     const_iterator end() const { return const_iterator(m_ranges.end()); }
     const_reverse_iterator rbegin() const { return const_reverse_iterator(m_ranges.rbegin()); }
@@ -114,6 +129,8 @@ namespace doc {
     frame_t firstFrame() const { return (!m_ranges.empty() ? m_ranges.front().fromFrame: -1); }
     frame_t lastFrame() const { return (!m_ranges.empty() ? m_ranges.back().toFrame: -1); }
 
+    Reversed reversed() const { return Reversed(*this); }
+
   private:
     Ranges m_ranges;
   };
diff --git a/src/doc/selected_frames_tests.cpp b/src/doc/selected_frames_tests.cpp
index 8a46af432..a579e7972 100644
--- a/src/doc/selected_frames_tests.cpp
+++ b/src/doc/selected_frames_tests.cpp
@@ -115,6 +115,12 @@ TEST(SelectedFrames, ReverseIterators)
   EXPECT_EQ(6, res[1]);
   EXPECT_EQ(5, res[2]);
   EXPECT_EQ(1, res[3]);
+
+  std::vector<frame_t> res2;
+  for (frame_t frame : f.reversed())
+    res2.push_back(frame);
+
+  EXPECT_EQ(res, res2);
 }
 
 int main(int argc, char** argv)