added basic razor tool

app/node/output/timeline/timeline.cpp

@@ -64,6 +64,7 @@ void TimelineOutput::AttachTimeline(TimelinePanel *timeline)
     //disconnect(view, SIGNAL(RequestInsertBlockAtIndex(Block*, int)), this, SLOT(InsertBlockAtIndex(Block*, int)));
     disconnect(view, SIGNAL(RequestPlaceBlock(Block*, rational, int)), this, SLOT(PlaceBlock(Block*, rational, int)));
     disconnect(view, SIGNAL(RequestReplaceBlock(Block*, Block*, int)), this, SLOT(ReplaceBlock(Block*, Block*, int)));
+    disconnect(view, SIGNAL(RequestSplitAtTime(rational, int)), this, SLOT(SplitAtTime(rational, int)));
 
     // Remove existing UI objects from TimelinePanel
     attached_timeline_->Clear();
@@ -86,6 +87,7 @@ void TimelineOutput::AttachTimeline(TimelinePanel *timeline)
     //connect(view, SIGNAL(RequestInsertBlockAtIndex(Block*, int)), this, SLOT(InsertBlockAtIndex(Block*, int)));
     connect(view, SIGNAL(RequestPlaceBlock(Block*, rational, int)), this, SLOT(PlaceBlock(Block*, rational, int)));
     connect(view, SIGNAL(RequestReplaceBlock(Block*, Block*, int)), this, SLOT(ReplaceBlock(Block*, Block*, int)));
+    connect(view, SIGNAL(RequestSplitAtTime(rational, int)), this, SLOT(SplitAtTime(rational, int)));
   }
 }
 
@@ -255,3 +257,17 @@ void TimelineOutput::ReplaceBlock(Block *old, Block *replace, int track)
 {
   track_cache_.at(track)->ReplaceBlock(old, replace);
 }
+
+void TimelineOutput::SplitAtTime(rational time, int track)
+{
+  if (track >= track_cache_.size()) {
+    return;
+  }
+
+  track_cache_.at(track)->SplitAtTime(time);
+}
+
+void TimelineOutput::ResizeBlock(Block *block, rational new_length)
+{
+  block->set_length(new_length);
+}

app/node/output/timeline/timeline.h

@@ -112,6 +112,16 @@ private slots:
    */
   void ReplaceBlock(Block* old, Block* replace, int track);
 
+  /**
+   * @brief Forwards a SplitAtTime signal to the appropriate track
+   */
+  void SplitAtTime(rational time, int track);
+
+  /**
+   * @brief Resizes a Block
+   */
+  void ResizeBlock(Block* block, rational new_length);
+
 };
 
 #endif // TIMELINEOUTPUT_H

app/node/output/track/track.cpp

@@ -327,6 +327,23 @@ Block* TrackOutput::SplitBlock(Block *block, rational time)
   return copy;
 }
 
+void TrackOutput::SplitAtTime(rational time)
+{
+  // Find Block that contains this time
+  for (int i=0;i<block_cache_.size();i++) {
+    Block* b = block_cache_.at(i);
+
+    if (b->out() == time) {
+      // This time is between blocks, no split needs to occur
+      return;
+    } else if (b->in() < time && b->out() > time) {
+      // We found the Block, split it
+      SplitBlock(b, time);
+      return;
+    }
+  }
+}
+
 void TrackOutput::RippleRemoveArea(rational in, rational out, Block *insert)
 {
   // Block that needs to be split to remove this area

app/node/output/track/track.h

@@ -116,6 +116,13 @@ public:
    */
   Block *SplitBlock(Block* block, rational time);
 
+  /**
+   * @brief Attempt to split at a certain time
+   *
+   * Finds the Block that surrounds this time and splits it. If there is no Block there, this is a no-op.
+   */
+  void SplitAtTime(rational time);
+
   /**
    * @brief Clears the area between in and out
    *