Create persistent character overlay

1 files changed, 37 insertions, 2 deletions

diff --git a/lua/clever_f/feedback_service.lua b/lua/clever_f/feedback_service.lua
index 9c16cca..a5b0dd0 100644
--- a/lua/clever_f/feedback_service.lua
+++ b/lua/clever_f/feedback_service.lua
@@ -104,8 +104,10 @@ local function require_transitions(transitions, state)
   if type(transitions) ~= "table"
     or type(transitions.AddTemporaryOverlay) ~= "function"
     or type(transitions.RemoveTemporaryOverlay) ~= "function"
+    or type(transitions.AddTargetOverlay) ~= "function"
+    or type(transitions.ClearTargetOverlays) ~= "function"
   then
-    fail("FeedbackService transitions must manage temporary overlays", 3)
+    fail("FeedbackService transitions must manage overlay resources", 3)
   end
   return transitions
 end
@@ -426,9 +428,42 @@ function FeedbackService:build_persistent(specification)
   }
 end
 
+local function remove_target_overlays(record, window)
+  local resources = record.transitions:ClearTargetOverlays(window)
+  for _, resource in ipairs(resources) do
+    record.host:remove_highlight(resource.identity)
+  end
+  return resources
+end
+
+function FeedbackService:remove_character_overlays(window)
+  if window == nil then
+    fail("character overlay window must identify its host window", 2)
+  end
+  return remove_target_overlays(service_records[self], window)
+end
+
 function FeedbackService:request_persistent(specification)
   local request = self:build_persistent(specification)
-  local requests = service_records[self].persistent_requests
+  if request.window == nil then
+    fail("persistent feedback window must identify its host window", 2)
+  end
+  local record = service_records[self]
+  remove_target_overlays(record, request.window)
+  request.identity = record.host:create_highlight({
+    group = "CleverFChar",
+    window = request.window,
+    positions = request.positions,
+    priority = M.overlay_priority("CleverFChar"),
+    target_plan = request.target_plan,
+    descriptor = request.descriptor,
+    endpoint_policy = request.endpoint_policy,
+    match_start_line = request.match_start_line,
+  })
+  request.group = "CleverFChar"
+  request.priority = M.overlay_priority("CleverFChar")
+  record.transitions:AddTargetOverlay(request.identity, request.window)
+  local requests = record.persistent_requests
   requests[#requests + 1] = request
   return request
 end