Add highlight=yes|no to [scroll_to], [scroll_to_unit], [message]

Defaults to no in the first two cases, yes in the third
If yes, the target hex is outlined.

changelog

@@ -6,6 +6,9 @@ Version 1.13.4+dev:
    * Fix some issues with [foreach]
    * Fix some issues with backstab-like weapon specials
    * Support [effect]times=<integer>
+   * Add highlight=yes|no to [scroll_to], [scroll_to_unit], [message]
+     Defaults to no in the first two cases, yes in the third
+     If yes, the target hex is outlined.
  * Lua API:
    * wesnoth.match_unit can now take a location (rather than a unit) as
      the optional third parameter. This will cause the filter to consider

data/lua/wml-tags.lua

@@ -573,13 +573,21 @@ function wml_actions.scroll_to(cfg)
 	if not loc then return end
 	if not utils.optional_side_filter(cfg) then return end
 	wesnoth.scroll_to_tile(loc[1], loc[2], cfg.check_fogged, cfg.immediate)
+	if cfg.highlight then
+		wesnoth.highlight_hex(loc[1], loc[2])
+		wml_actions.redraw{}
+	end
 end
 
 function wml_actions.scroll_to_unit(cfg)
 	local u = wesnoth.get_units(cfg)[1]
 	if not u then return end
 	if not utils.optional_side_filter(cfg, "for_side", "for_side") then return end
 	wesnoth.scroll_to_tile(u.x, u.y, cfg.check_fogged, cfg.immediate)
+	if cfg.highlight then
+		wesnoth.highlight_hex(u.x, u.y)
+		wml_actions.redraw{}
+	end
 end
 
 function wml_actions.lock_view(cfg)
@@ -593,7 +601,7 @@ end
 function wml_actions.select_unit(cfg)
 	local u = wesnoth.get_units(cfg)[1]
 	if not u then return end
-	wesnoth.select_hex(u.x, u.y, cfg.highlight, cfg.fire_event)
+	wesnoth.select_unit(u.x, u.y, cfg.highlight, cfg.fire_event)
 end
 
 function wml_actions.unit_overlay(cfg)

data/lua/wml/message.lua

@@ -206,6 +206,8 @@ function wesnoth.wml_actions.message(cfg)
 		-- No matching unit found, continue onto the next message
 		log("No speaker found for [message]", "debug")
 		return
+	elseif cfg.highlight == false then
+		-- Nothing to do here
 	elseif speaker == "narrator" then
 		-- Narrator, so deselect units
 		wesnoth.deselect_hex()