refresh overlay and helpdb on new world to pick up mod content

library/lua/helpdb.lua

@@ -12,6 +12,8 @@ local TAG_DEFINITIONS = 'hack/docs/docs/Tags.txt'
 local SCRIPT_DOC_BEGIN = '[====['
 local SCRIPT_DOC_END = ']====]'
 
+local GLOBAL_KEY = 'HELPDB'
+
 -- enums
 local ENTRY_TYPES = {
     BUILTIN='builtin',
@@ -423,6 +425,14 @@ function refresh()
     ensure_db()
 end
 
+dfhack.onStateChange[GLOBAL_KEY] = function(sc)
+    if sc ~= SC_WORLD_LOADED then
+        return
+    end
+    -- pick up widgets from active mods
+    refresh()
+end
+
 local function parse_blocks(text)
     local blocks = {}
     for line in text:gmatch('[^\n]*') do

plugins/lua/overlay.lua

@@ -8,6 +8,7 @@ local widgets = require('gui.widgets')
 
 local OVERLAY_CONFIG_FILE = 'dfhack-config/overlay.json'
 local OVERLAY_WIDGETS_VAR = 'OVERLAY_WIDGETS'
+local GLOBAL_KEY = 'OVERLAY'
 
 local DEFAULT_X_POS, DEFAULT_Y_POS = -2, -2
 
@@ -311,6 +312,14 @@ function reload()
     reposition_widgets()
 end
 
+dfhack.onStateChange[GLOBAL_KEY] = function(sc)
+    if sc ~= SC_WORLD_LOADED then
+        return
+    end
+    -- pick up widgets from active mods
+    reload()
+end
+
 local function dump_widget_config(name, widget)
     local pos = overlay_config[name].pos
     print(('widget %s is positioned at x=%d, y=%d'):format(name, pos.x, pos.y))