add autolabor warning overlay widget

plugins/lua/autolabor.lua

@@ -0,0 +1,47 @@
+local _ENV = mkmodule('plugins.autolabor')
+
+local gui = require('gui')
+local overlay = require('plugins.overlay')
+local widgets = require('gui.widgets')
+
+local function is_labor_panel_visible()
+    local info = df.global.game.main_interface.info
+    return info.open and info.current_mode == df.info_interface_mode_type.LABOR
+end
+
+AutolaborOverlay = defclass(AutolaborOverlay, overlay.OverlayWidget)
+AutolaborOverlay.ATTRS{
+    default_pos={x=7,y=-13},
+    default_enabled=true,
+    viewscreens='dwarfmode',
+    frame={w=29, h=5},
+    frame_style=gui.MEDIUM_FRAME,
+    frame_background=gui.CLEAR_PEN,
+}
+
+function AutolaborOverlay:init()
+    self:addviews{
+        widgets.Label{
+            frame={t=0, l=0},
+            text_pen=COLOR_RED,
+            text={
+                'DFHack autolabor is active!', NEWLINE,
+                'Any changes made on this', NEWLINE,
+                'screen will have no effect.'
+            },
+        },
+    }
+end
+
+function AutolaborOverlay:render(dc)
+    if not is_labor_panel_visible() or not isEnabled() then
+        return false
+    end
+    AutolaborOverlay.super.render(self, dc)
+end
+
+OVERLAY_WIDGETS = {
+    overlay=AutolaborOverlay,
+}
+
+return _ENV