implemented reveal in footage viewer option

Fixes #1958

app/widget/timelinewidget/timelinewidget.cpp

@@ -1073,6 +1073,11 @@ void TimelineWidget::ShowContextMenu()
 
     if (ClipBlock *clip = dynamic_cast<ClipBlock*>(selected.first())) {
       if (clip->connected_viewer()) {
+        QAction *reveal_in_footage_viewer = menu.addAction(tr("Reveal in Footage Viewer"));
+        reveal_in_footage_viewer->setData(reinterpret_cast<quintptr>(clip->connected_viewer()));
+        reveal_in_footage_viewer->setProperty("range", QVariant::fromValue(clip->media_range()));
+        connect(reveal_in_footage_viewer, &QAction::triggered, this, &TimelineWidget::RevealInFootageViewer);
+
         QAction *reveal_in_project = menu.addAction(tr("Reveal in Project"));
         reveal_in_project->setData(reinterpret_cast<quintptr>(clip->connected_viewer()));
         connect(reveal_in_project, &QAction::triggered, this, &TimelineWidget::RevealInProject);
@@ -1203,6 +1208,16 @@ void TimelineWidget::SignalBlockSelectionChange()
   signal_block_change_timer_->start();
 }
 
+void TimelineWidget::RevealInFootageViewer()
+{
+  QAction *a = static_cast<QAction*>(sender());
+
+  ViewerOutput *item_to_reveal = reinterpret_cast<ViewerOutput*>(a->data().value<quintptr>());
+  TimeRange r = a->property("range").value<TimeRange>();
+
+  emit RevealViewerInFootageViewer(item_to_reveal, r);
+}
+
 void TimelineWidget::RevealInProject()
 {
   QAction *a = static_cast<QAction*>(sender());

app/widget/timelinewidget/timelinewidget.h

@@ -277,6 +277,7 @@ signals:
 
   void RequestCaptureStart(const TimeRange &time, const Track::Reference &track);
 
+  void RevealViewerInFootageViewer(ViewerOutput *r, const TimeRange &range);
   void RevealViewerInProject(ViewerOutput *r);
 
 protected:
@@ -425,6 +426,7 @@ private slots:
 
   void SignalBlockSelectionChange();
 
+  void RevealInFootageViewer();
   void RevealInProject();
 
   void RenameSelectedBlocks();

app/widget/viewer/footageviewer.cpp

@@ -38,6 +38,22 @@ FootageViewerWidget::FootageViewerWidget(QWidget *parent) :
   controls_->SetAudioVideoDragButtonsVisible(true);
   connect(controls_, &PlaybackControls::VideoPressed, this, &FootageViewerWidget::StartVideoDrag);
   connect(controls_, &PlaybackControls::AudioPressed, this, &FootageViewerWidget::StartAudioDrag);
+
+  override_workarea_ = new TimelineWorkArea(this);
+}
+
+void FootageViewerWidget::OverrideWorkArea(const TimeRange &r)
+{
+  override_workarea_->set_enabled(true);
+  override_workarea_->set_range(r);
+  this->ConnectWorkArea(override_workarea_);
+}
+
+void FootageViewerWidget::ResetWorkArea()
+{
+  if (GetConnectedWorkArea() == override_workarea_) {
+    this->ConnectWorkArea(GetConnectedNode() ? GetConnectedNode()->GetWorkArea() : nullptr);
+  }
 }
 
 void FootageViewerWidget::ConnectNodeEvent(ViewerOutput *n)

app/widget/viewer/footageviewer.h

@@ -32,6 +32,9 @@ class FootageViewerWidget : public ViewerWidget
 public:
   FootageViewerWidget(QWidget* parent = nullptr);
 
+  void OverrideWorkArea(const TimeRange &r);
+  void ResetWorkArea();
+
 protected:
   virtual void ConnectNodeEvent(ViewerOutput *) override;
 
@@ -42,6 +45,8 @@ private:
 
   QHash<ViewerOutput*, rational> cached_timestamps_;
 
+  TimelineWorkArea *override_workarea_;
+
 private slots:
   void StartFootageDrag();