Added a command to build a plate to the factory tab in spot BZ aka ro…

…w 3, column 1. When command is issued, cursor shows a plate icon, and if cursor moves in range of a factory, the active command gets switched to building a plate of that factory.

It's implemented as a generic do-nothing command in LuaRules, and I edited cmd_factory_plate_placer.lua in LuaUI to add the behavior there in a way that does not disrupt the current plating behavior.  This allows it to also use the LuaUI glsl stuff in the current widget, which is familiar and looks nicer.

Anims/cursorplate.txt

@@ -0,0 +1,2 @@
+hotspot topleft
+frame  anims/cursorplate_0.png  0.1

Anims/zk_large/cursorplate.txt

@@ -0,0 +1,2 @@
+hotspot topleft
+frame  anims/cursorplate_0.png  0.1

LuaRules/Configs/customcmds.lua

@@ -104,4 +104,7 @@ return {
 	RESTORE = 39739,
 	BUMPY = 39740,
 	TERRAFORM_INTERNAL = 39801,
+
+	-- build plate
+	PLATE = 39802,
 }

LuaRules/Gadgets/cmd_generic_plate.lua

@@ -0,0 +1,124 @@
+--------------------------------------------------------------------------------
+--------------------------------------------------------------------------------
+
+function gadget:GetInfo()
+	return {
+		name      = "Generic Plate Command",
+		desc      = "Implements CMD_PLATE as a do-nothing command, behaviour is defined in LuaUI",
+		author    = "DavetheBrave",
+		date      = "23 September 2021",
+		license   = "GNU GPL, v2 or later",
+		layer     = 0,
+		enabled   = true,
+	}
+end
+
+--------------------------------------------------------------------------------
+--------------------------------------------------------------------------------
+-- Speedup
+include("LuaRules/Configs/customcmds.h.lua")
+
+if gadgetHandler:IsSyncedCode() then
+
+local spInsertUnitCmdDesc   = Spring.InsertUnitCmdDesc
+local spGetUnitAllyTeam     = Spring.GetUnitAllyTeam
+local spGetUnitIsDead       = Spring.GetUnitIsDead
+
+local constructors          = 0
+local constructor           = {}
+local constructorTable      = {}
+local constructors          = 0
+
+
+local exceptionArray = {
+	[UnitDefNames["athena"].id] = true,
+}
+local plateCmdDesc = {
+	id      = CMD_PLATE,
+	type    = CMDTYPE.ICON_MAP,
+	name    = 'plate',
+	cursor  = 'Plate',
+	action  = 'plate',
+	tooltip = 'Build a Plate of a nearby factory',
+}
+
+local wantedCommands = {
+	[CMD_PLATE] = true,
+}
+
+function gadget:AllowCommand_GetWantedCommand()
+	return wantedCommands
+end
+
+function gadget:AllowCommand_GetWantedUnitDefID()
+	return true
+end
+
+-- local function dump(o)
+   -- if type(o) == 'table' then
+      -- local s = '{ '
+      -- for k,v in pairs(o) do
+         -- if type(k) ~= 'number' then k = '"'..k..'"' end
+         -- s = s .. '['..k..'] = ' .. dump(v) .. ','
+      -- end
+      -- return s .. '} '
+   -- else
+      -- return tostring(o)
+   -- end
+-- end
+
+local plateUnitDefIDs = {}
+for i = 1, #UnitDefs do
+	local ud = UnitDefs[i]
+	if ud and ud.isMobileBuilder and not ud.isFactory and not exceptionArray[i] then
+		plateUnitDefIDs[i] = true
+	end
+end
+
+function gadget:AllowCommand(unitID, unitDefID, teamID, cmdID, cmdParams, cmdOptions)
+	-- Don't allow non-constructors to queue terraform fallback.
+	if not plateUnitDefIDs[unitDefID] then
+		return false
+	end
+	return true
+--------------------------------------------------------------------------------
+--------------------------------------------------------------------------------
+end
+
+function gadget:UnitCreated(unitID, unitDefID, teamID)
+	if spGetUnitIsDead(unitID) then
+		return
+	end
+
+	local ud = UnitDefs[unitDefID]
+	-- add plate command to builders
+	if plateUnitDefIDs[unitDefID] then
+		spInsertUnitCmdDesc(unitID, plateCmdDesc)
+		local aTeam = spGetUnitAllyTeam(unitID)
+		constructors = constructors + 1
+		constructorTable[constructors] = unitID
+		constructor[unitID]    = {allyTeam = aTeam, index = constructors}
+	end
+end
+
+function gadget:UnitDestroyed(unitID, unitDefID, teamID)
+	if constructor[unitID] then
+		local index = constructor[unitID].index
+		if index ~= constructors then
+			constructorTable[index] = constructorTable[constructors]
+		end
+		constructorTable[constructors] = nil
+		constructors = constructors - 1
+		constructor[unitID]    = nil
+	end
+end
+
+function gadget:Initialize()
+	gadgetHandler:RegisterCMDID(CMD_PLATE)
+end
+
+else
+function gadget:Initialize()
+	Spring.AssignMouseCursor("Plate", "cursorplate", true, true)
+end
+end

LuaUI/Configs/border_menu_commands.lua

@@ -51,6 +51,7 @@ local buildoptions = {
 		{ "platetank",  notSea=true },
 
 		{ "striderhub" },
+		{CMD_PLATE, tech=3 },
 	},
 
 	{-- economy
@@ -215,6 +216,7 @@ local overrides = {
 	[CMD_SMOOTH] = {texture = imageDir .. 'smooth.png'},
 	[CMD_RESTORE] = {texture = imageDir .. 'restore.png'},
 	[CMD_BUMPY] = {texture = imageDir .. 'bumpy.png'},
+	[CMD_PLATE] = {texture = imageDir .. 'plate.png'},
 
 	[CMD_AREA_MEX] = {caption = '', texture = imageDir .. 'Bold/mex.png'},
 	[CMD_AREA_TERRA_MEX] = {caption = '', texture = imageDir .. 'Bold/mex.png'},
@@ -333,6 +335,7 @@ local custom_cmd_actions = {	-- states are 2, not states are 1
 	smoothground=1,
 	restoreground=1,
 	--terraform_internal=1,
+	plate=1,
 
 	resetfire=1,
 	resetmove=1,

LuaUI/Configs/customCmdTypes.lua

@@ -90,6 +90,9 @@ local custom_cmd_actions = {
 	restoreground = {cmdType = 1, name = "Terraform Restore"},
 	--terraform_internal = {cmdType = 1, name = "--terraform_internal"},
 
+	--build a "generic" plate from build factory menu
+	plate = {cmdType = 1, name = "plate"}, 
+
 	resetfire = {cmdType = 3, name = "Reset Fire"},
 	resetmove = {cmdType = 3, name = "Reset Move"},
 
@@ -163,6 +166,7 @@ local usedActions = {
 	["raiseground"] = true,
 	["smoothground"] = true,
 	["restoreground"] = true,
+	["buildplate"] = true,
 	["jump"] = true,
 	["idlemode"] = true,
 	["areaattack"] = true,

LuaUI/Configs/integral_menu_commands.lua

@@ -24,6 +24,8 @@ local cmdPosDef = {
 	[CMD_AREA_GUARD]    = {pos = 1, priority = 10},
 	[CMD.AREA_ATTACK]   = {pos = 1, priority = 11},
 
+	--[CMD_PLATE]       = {pos = 7, priority = 12},
+
 	[CMD_UPGRADE_UNIT]  = {pos = 7, priority = -8},
 	[CMD_UPGRADE_STOP]  = {pos = 7, priority = -7},
 	[CMD_MORPH]         = {pos = 7, priority = -6},
@@ -290,6 +292,7 @@ local factory_commands = {
 	factoryamph       = {order = 10, row = 2, col = 4},
 	factoryship       = {order = 11, row = 2, col = 5},
 	striderhub        = {order = 12, row = 2, col = 6},
+	[CMD_PLATE]       = {order = 13, row = 3, col = 1},
 }
 
 local econ_commands = {

LuaUI/Configs/integral_menu_config.lua

@@ -71,6 +71,7 @@ local commandDisplayConfig = {
 	[CMD_SMOOTH] = {texture = imageDir .. 'smooth.png'},
 	[CMD_RESTORE] = {texture = imageDir .. 'restore.png'},
 	[CMD_BUMPY] = {texture = imageDir .. 'bumpy.png'},
+	[CMD_PLATE] = {texture = imageDir .. 'plate.png'},
 
 	[CMD_AREA_GUARD] = { texture = imageDir .. 'Bold/guard.png', tooltip = "Guard: Protect the target and assist its production."},
 
@@ -421,12 +422,20 @@ for i = 1, 5 do
 	}
 end
 
+local factoryButtonLayoutOverride = {}
+	factoryButtonLayoutOverride[1] = {
+		[3] = {
+			buttonLayoutConfig = buttonLayoutConfig.command,
+			isStructure = false,
+		}
+	}
+
 local commandPanels = {
 	{
 		humanName = "Orders",
 		name = "orders",
 		inclusionFunction = function(cmdID)
-			return cmdID >= 0 and not buildCmdSpecial[cmdID] -- Terraform
+			return cmdID >= 0 and not buildCmdFactory[cmdID] and not buildCmdSpecial[cmdID]-- Terraform and Plate
 		end,
 		loiterable = true,
 		buttonLayoutConfig = buttonLayoutConfig.command,
@@ -484,10 +493,12 @@ local commandPanels = {
 		end,
 		isBuild = true,
 		isStructure = true,
+		notBuildRow = 3,
 		gridHotkeys = true,
 		returnOnClick = "orders",
 		optionName = "tab_factory",
 		buttonLayoutConfig = buttonLayoutConfig.build,
+		buttonLayoutOverride = factoryButtonLayoutOverride,
 	},
 	{
 		humanName = "Units",