feat: use range instead of location/arrangement markers

Signed-off-by: Christopher Arndt <chris@chrisarndt.de>

rename_regions_from_markers.lua

@@ -3,10 +3,10 @@ ardour {
     name        = "Rename regions from markers",
     license     = "MIT",
     author      = "Christopher Arndt",
-    description = [[Rename selected regions using track name and label of location marker at region start]]
+    description = [[Rename selected regions using track name and label of range marker at region start]]
 }
 
-function factory ()
+function factory()
     -- there is currently no direct way to find the track
     -- corresponding to a [selected] region
     function find_track_for_region(region_id)
@@ -20,11 +20,10 @@ function factory ()
         assert (0) -- can't happen, region must be in a playlist
     end
 
-    return function ()
+    return function()
         local sel = Editor:get_selection () -- get current selection
         local loc = Session:locations()     -- get locations
 
-
         -- prepare undo operation
         Session:begin_reversible_command ("Rename regions from markers")
 
@@ -32,17 +31,17 @@ function factory ()
         for region in sel.regions:regionlist():iter () do
             -- test if it's an audio region
             local ar = region:to_audioregion ()
-            if ar:isnil () then
+            if ar:isnil() then
                 goto next
             end
 
             --~ print("Region:", region:name())
             local rid = region:to_stateful():id()
-            --~ print("ID:", id:to_s())
+            --~ print("ID:", rid:to_s())
 
-            -- get marker at region start position
+            -- get range marker at region start position
             local pos = region:position()
-            local mloc = loc:first_mark_at(pos, Temporal.timecnt_t(0))
+            local mloc = loc:range_starts_at(pos, Temporal.timecnt_t(0), true)
             if not mloc then
                 goto next
             end