Added Duration to filename formatter

src/app/doc_exporter.cpp

@@ -892,7 +892,8 @@ void DocExporter::captureSamples(Samples& samples,
         .outerTagName(outerTag ? outerTag->name(): "")
         .frame(outputFrame)
         .tagFrame(innerTag ? frame - innerTag->fromFrame():
-                             outputFrame);
+                             outputFrame)
+        .duration(sprite->frameDuration(frame));
       ++outputFrame;
 
       std::string filename = filename_formatter(format, fnInfo);

src/app/filename_formatter.cpp

@@ -112,6 +112,7 @@ std::string filename_formatter(
   base::replace_string(output, "{layer}", info.layerName());
   base::replace_string(output, "{group}", info.groupName());
   base::replace_string(output, "{slice}", info.sliceName());
+  base::replace_string(output, "{duration}", std::to_string(info.duration()));
 
   if (replaceFrame) {
     base::replace_string(output, "{tag}", info.innerTagName());

src/app/filename_formatter.h

@@ -24,6 +24,7 @@ namespace app {
     const std::string& sliceName() const { return m_sliceName; }
     int frame() const { return m_frame; }
     int tagFrame() const { return m_tagFrame; }
+    int duration() const { return m_duration; }
 
     FilenameInfo& filename(const std::string& value) {
       m_filename = value;
@@ -65,6 +66,11 @@ namespace app {
       return *this;
     }
 
+    FilenameInfo& duration(int value) {
+      m_duration = value;
+      return *this;
+    }
+
   private:
     std::string m_filename;
     std::string m_layerName;
@@ -74,6 +80,7 @@ namespace app {
     std::string m_sliceName;
     int m_frame;
     int m_tagFrame;
+    int m_duration;
   };
 
   // Returns the information inside {frame} tag.