Register buffer feedback finalizers

1 files changed, 29 insertions, 0 deletions

diff --git a/lua/clever_f/feedback_service.lua b/lua/clever_f/feedback_service.lua
index 39ae527..492eda6 100644
--- a/lua/clever_f/feedback_service.lua
+++ b/lua/clever_f/feedback_service.lua
@@ -15,6 +15,11 @@ M.Priority = {
   HIGH = "high",
   ORDINARY = "ordinary",
 }
+M.FINALIZER_EVENTS = {
+  "CursorMoved",
+  "InsertEnter",
+  "TextChanged",
+}
 
 local OVERLAY_PRIORITIES = {
   CleverFCursor = M.Priority.HIGH,
@@ -95,6 +100,8 @@ local function require_host(host)
     or type(host.define_highlight_group) ~= "function"
     or type(host.create_highlight) ~= "function"
     or type(host.remove_highlight) ~= "function"
+    or type(host.read_buffer) ~= "function"
+    or type(host.register_events) ~= "function"
     or type(host.supports_cursor_presentation) ~= "function"
     or type(host.suppress_cursor_presentation) ~= "function"
     or type(host.restore_cursor_presentation) ~= "function"
@@ -111,6 +118,7 @@ local function require_transitions(transitions, state)
     or type(transitions.RemoveTemporaryOverlay) ~= "function"
     or type(transitions.AddTargetOverlay) ~= "function"
     or type(transitions.ClearTargetOverlays) ~= "function"
+    or type(transitions.AddFinalizer) ~= "function"
   then
     fail("FeedbackService transitions must manage overlay resources", 3)
   end
@@ -447,6 +455,26 @@ function FeedbackService:remove_character_overlays(window)
   return remove_target_overlays(service_records[self], window)
 end
 
+function FeedbackService:handle_finalizer_event()
+  return false
+end
+
+local function register_finalizers(service, record)
+  local buffer = record.host:read_buffer()
+  local identity = record.host:register_events(
+    M.FINALIZER_EVENTS,
+    function(name, payload)
+      service:handle_finalizer_event(name, payload)
+    end,
+    { buffer = buffer }
+  )
+  record.transitions:AddFinalizer(identity, buffer)
+  return {
+    identity = identity,
+    buffer = buffer,
+  }
+end
+
 function FeedbackService:request_persistent(specification)
   local request = self:build_persistent(specification)
   if request.window == nil then
@@ -471,6 +499,7 @@ function FeedbackService:request_persistent(specification)
     request.window,
     request.anchor.line
   )
+  request.finalizers = register_finalizers(self, record)
   local requests = record.persistent_requests
   requests[#requests + 1] = request
   return request