Renamed variable

@@ -192,6 +192,16 @@ class LayerMask : public ::GreasePencilLayerMask {
   ~LayerMask();
 };
 
+struct LayerTransData {

@@ -195,0 +195,4 @@
+struct LayerTransData {
+  enum FrameTransformationStatus { TRANS_CLEAR, TRANS_INIT, TRANS_RUNNING };
+
+  Map<int, int> trans_map;

@@ -1576,0 +1586,4 @@
+  /* Remove all frames that have a mapping. */
+  for (const int frame_number : trans_frame_numbers.keys()) {
+    layer.remove_frame(frame_number);
+  }

@@ -48,0 +105,4 @@
+
+  switch (trans_data.status) {
+    case LayerTransData::TRANS_INIT:
+      /* The transdata was only initialized. No transformation was applied yet.

@@ -1576,0 +1607,4 @@
+      GreasePencilDrawingBase *drawing_base = this->drawings(frame_to_overwrite.drawing_index);
+      if (drawing_base->type == GP_DRAWING) {
+        reinterpret_cast<GreasePencilDrawing *>(drawing_base)->wrap().remove_user();
+        drawing_indices_to_check_for_deletion.append(frame_to_overwrite.drawing_index);

@@ -1576,0 +1616,4 @@
+  }
+
+  /* Remove drawings if they have no more users. */
+  for (const int drawing_index : drawing_indices_to_check_for_deletion) {

@@ -43,8 +44,125 @@ struct tGPFtransdata {
     float loc[3]; /* #td->val and #td->loc share the same pointer. */
   };
   int *sdata; /* pointer to gpf->framenum */
+  void *extra{};

@@ -761,0 +765,4 @@
+    return -1;
+  }
+  SortedKeysIterator frame_number_it = std::next(this->sorted_keys().begin(), frame_key);
+  if (std::next(frame_number_it) == this->sorted_keys().end()) {

@@ -1604,2 +1606,4 @@
 }
 
+void GreasePencil::move_frames(blender::bke::greasepencil::Layer &layer,
+                               const blender::Map<int, int> &trans_frame_numbers)

@@ -1606,0 +1610,4 @@
+{
+  using namespace blender;
+
+  /* Clear the frames' data. */

@@ -619,0 +866,4 @@
+
+    if ((t->state == TRANS_RUNNING) && ((td->flag & TD_GREASE_PENCIL_FRAME) != 0)) {
+      using namespace blender::bke::greasepencil;
+      grease_pencil_layer_update_trans_data(*static_cast<Layer *>(td->extra),

@@ -640,0 +902,4 @@
+        if (ale->type != ANIMTYPE_GREASE_PENCIL_LAYER) {
+          continue;
+        }
+        grease_pencil_layer_reset_trans_data(*static_cast<Layer *>(ale->data));