UI: add "compositor" layer to merge grids for TUI use in a correct way

Initially we will use this for the popupmenu, floating windows will
follow soon

NB: writedelay + compositor is weird, we need more flexible
redraw introspection.

2 files changed, 25 insertions, 7 deletions

diff --git a/src/nvim/generators/c_grammar.lua b/src/nvim/generators/c_grammar.lua
index d3047e1a9c..40bdc3e30c 100644
--- a/src/nvim/generators/c_grammar.lua
+++ b/src/nvim/generators/c_grammar.lua
@@ -25,6 +25,7 @@ local c_id = (
 local c_void = P('void')
 local c_param_type = (
   ((P('Error') * fill * P('*') * fill) * Cc('error')) +
+  C((P('const ') ^ -1) * (c_id) * (ws ^ 1) * P('*')) +
   (C(c_id) * (ws ^ 1))
   )
 local c_type = (C(c_void) * (ws ^ 1)) + c_param_type
@@ -43,6 +44,7 @@ local c_proto = Ct(
   (fill * Cg((P('FUNC_API_REMOTE_ONLY') * Cc(true)), 'remote_only') ^ -1) *
   (fill * Cg((P('FUNC_API_REMOTE_IMPL') * Cc(true)), 'remote_impl') ^ -1) *
   (fill * Cg((P('FUNC_API_BRIDGE_IMPL') * Cc(true)), 'bridge_impl') ^ -1) *
+  (fill * Cg((P('FUNC_API_COMPOSITOR_IMPL') * Cc(true)), 'compositor_impl') ^ -1) *
   fill * P(';')
   )
 
diff --git a/src/nvim/generators/gen_api_ui_events.lua b/src/nvim/generators/gen_api_ui_events.lua
index e76b601d8a..c8ab310b02 100644
--- a/src/nvim/generators/gen_api_ui_events.lua
+++ b/src/nvim/generators/gen_api_ui_events.lua
@@ -54,7 +54,7 @@ for i = 1, #events do
   ev = events[i]
   assert(ev.return_type == 'void')
 
-  if ev.since == nil then
+  if ev.since == nil and not ev.noexport then
     print("Ui event "..ev.name.." lacks since field.\n")
     os.exit(1)
   end
@@ -65,7 +65,7 @@ for i = 1, #events do
     write_signature(proto_output, ev, 'UI *ui')
     proto_output:write(';\n')
 
-    if not ev.remote_impl then
+    if not ev.remote_impl and not ev.noexport then
       remote_output:write('static void remote_ui_'..ev.name)
       write_signature(remote_output, ev, 'UI *ui')
       remote_output:write('\n{\n')
@@ -74,8 +74,7 @@ for i = 1, #events do
       remote_output:write('}\n\n')
     end
 
-    if not ev.bridge_impl then
-
+    if not ev.bridge_impl and not ev.noexport then
       send, argv, recv, recv_argv, recv_cleanup = '', '', '', '', ''
       argc = 1
       for j = 1, #ev.parameters do
@@ -138,21 +137,36 @@ for i = 1, #events do
     call_output:write('\n{\n')
     if ev.remote_only then
       write_arglist(call_output, ev, false)
-      call_output:write('  UI_LOG('..ev.name..', 0);\n')
+      call_output:write('  UI_LOG('..ev.name..');\n')
       call_output:write('  ui_event("'..ev.name..'", args);\n')
+    elseif ev.compositor_impl then
+      call_output:write('  UI_CALL')
+      write_signature(call_output, ev, '!ui->composed, '..ev.name..', ui', true)
+      call_output:write(";\n")
     else
       call_output:write('  UI_CALL')
-      write_signature(call_output, ev, ev.name, true)
+      write_signature(call_output, ev, 'true, '..ev.name..', ui', true)
       call_output:write(";\n")
     end
     call_output:write("}\n\n")
   end
 
+  if ev.compositor_impl then
+    call_output:write('void ui_composed_call_'..ev.name)
+    write_signature(call_output, ev, '')
+    call_output:write('\n{\n')
+    call_output:write('  UI_CALL')
+    write_signature(call_output, ev, 'ui->composed, '..ev.name..', ui', true)
+    call_output:write(";\n")
+    call_output:write("}\n\n")
+  end
+
 end
 
 proto_output:close()
 call_output:close()
 remote_output:close()
+bridge_output:close()
 
 -- don't expose internal attributes like "impl_name" in public metadata
 exported_attributes = {'name', 'parameters',
@@ -168,7 +182,9 @@ for _,ev in ipairs(events) do
       p[1] = 'Dictionary'
     end
   end
-  exported_events[#exported_events+1] = ev_exported
+  if not ev.noexport then
+    exported_events[#exported_events+1] = ev_exported
+  end
 end
 
 packed = mpack.pack(exported_events)