Feature: Allow GameScripts to add additional text to Industry view window

src/command.cpp

@@ -266,7 +266,7 @@ static const Command _command_proc_table[] = {
 	DEF_CMD(CmdChangeServiceInt,                               0, CMDT_VEHICLE_MANAGEMENT    ), // CMD_CHANGE_SERVICE_INT
 
 	DEF_CMD(CmdBuildIndustry,                          CMD_DEITY, CMDT_LANDSCAPE_CONSTRUCTION), // CMD_BUILD_INDUSTRY
-	DEF_CMD(CmdIndustryCtrl,                           CMD_DEITY, CMDT_OTHER_MANAGEMENT      ), // CMD_INDUSTRY_CTRL
+	DEF_CMD(CmdIndustryCtrl,            CMD_STR_CTRL | CMD_DEITY, CMDT_OTHER_MANAGEMENT      ), // CMD_INDUSTRY_CTRL
 
 	DEF_CMD(CmdSetCompanyManagerFace,                          0, CMDT_OTHER_MANAGEMENT      ), // CMD_SET_COMPANY_MANAGER_FACE
 	DEF_CMD(CmdSetCompanyColour,                               0, CMDT_OTHER_MANAGEMENT      ), // CMD_SET_COMPANY_COLOUR

src/industry.h

@@ -33,6 +33,13 @@ enum ProductionLevels {
 	PRODLEVEL_MAXIMUM = 0x80,  ///< the industry is running at full speed
 };
 
+enum class IndustryAction : byte {
+	SetControlFlags = 0,       ///< Set IndustryControlFlags
+	SetExclusiveSupplier = 1,  ///< Set exclusive supplier
+	SetExclusiveConsumer = 2,  ///< Set exclusive consumer
+	SetText = 3,               ///< Set additional text
+};
+
 /**
  * Flags to control/override the behaviour of an industry.
  * These flags are controlled by game scripts.
@@ -91,6 +98,7 @@ struct Industry : IndustryPool::PoolItem<&_industry_pool> {
 	byte selected_layout;          ///< Which tile layout was used when creating the industry
 	Owner exclusive_supplier;      ///< Which company has exclusive rights to deliver cargo (INVALID_OWNER = anyone)
 	Owner exclusive_consumer;      ///< Which company has exclusive rights to take cargo (INVALID_OWNER = anyone)
+	std::string text;              ///< General text with additional information.
 
 	uint16 random;                 ///< Random value used for randomisation of all kinds of things
 

src/industry_cmd.cpp

@@ -40,6 +40,8 @@
 #include "object_base.h"
 #include "game/game.hpp"
 #include "error.h"
+#include "cmd_helper.h"
+#include "string_func.h"
 
 #include "table/strings.h"
 #include "table/industry_land.h"
@@ -2063,16 +2065,13 @@ CommandCost CmdBuildIndustry(TileIndex tile, DoCommandFlag flags, uint32 p1, uin
  * @param flags Type of operation.
  * @param p1 IndustryID
  * @param p2 various bitstuffed elements
- * - p2 = (bit 0 - 7) - action to perform:
- *                      0 = set control flags
- *                      1 = set exclusive supplier
- *                      2 = set exclusive consumer
+ * - p2 = (bit 0 - 7) - IndustryAction to perform
  * - p2 = (bit 8 - 15) - IndustryControlFlags
  *                       (only used with set control flags)
  * - p2 = (bit 16 - 23) - CompanyID to set or INVALID_OWNER (available to everyone) or
  *                        OWNER_NONE (neutral stations only) or OWNER_DEITY (no one)
  *                        (only used with set exclusive supplier / consumer)
- * @param text unused
+ * @param text - Additional industry text (only used with set text action)
  * @return Empty cost or an error.
  */
 CommandCost CmdIndustryCtrl(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
@@ -2082,10 +2081,10 @@ CommandCost CmdIndustryCtrl(TileIndex tile, DoCommandFlag flags, uint32 p1, uint
 	Industry *ind = Industry::GetIfValid(p1);
 	if (ind == nullptr) return CMD_ERROR;
 
-	uint8 action = GB(p2, 0, 8);
+	auto action = static_cast<IndustryAction>(GB(p2, 0, 8));
 
 	switch (action) {
-		case 0: {
+		case IndustryAction::SetControlFlags: {
 			IndustryControlFlags ctlflags = (IndustryControlFlags)GB(p2, 8, 8) & INDCTL_MASK;
 
 			if (flags & DC_EXEC) ind->ctlflags = ctlflags;
@@ -2093,15 +2092,15 @@ CommandCost CmdIndustryCtrl(TileIndex tile, DoCommandFlag flags, uint32 p1, uint
 			break;
 		}
 
-		case 1:
-		case 2: {
+		case IndustryAction::SetExclusiveSupplier:
+		case IndustryAction::SetExclusiveConsumer: {
 			Owner company_id = (Owner)GB(p2, 16, 8);
 
 			if (company_id != OWNER_NONE && company_id != INVALID_OWNER && company_id != OWNER_DEITY
 				&& !Company::IsValidID(company_id)) return CMD_ERROR;
 
 			if (flags & DC_EXEC) {
-				if (action == 1) {
+				if (action == IndustryAction::SetExclusiveSupplier) {
 					ind->exclusive_supplier = company_id;
 				} else {
 					ind->exclusive_consumer = company_id;
@@ -2111,6 +2110,13 @@ CommandCost CmdIndustryCtrl(TileIndex tile, DoCommandFlag flags, uint32 p1, uint
 			break;
 		}
 
+		case IndustryAction::SetText: {
+			ind->text.clear();
+			if (!StrEmpty(text)) ind->text = text;
+			InvalidateWindowData(WC_INDUSTRY_VIEW, ind->index);
+			break;
+		}
+
 		default:
 			NOT_REACHED();
 	}

src/industry_gui.cpp

@@ -913,6 +913,13 @@ public:
 				}
 			}
 		}
+
+		if (!i->text.empty()) {
+			SetDParamStr(0, i->text.c_str());
+			y += WD_PAR_VSEP_WIDE;
+			y = DrawStringMultiLine(left + WD_FRAMERECT_LEFT, right - WD_FRAMERECT_RIGHT, y, UINT16_MAX, STR_JUST_RAW_STRING, TC_BLACK);
+		}
+
 		return y + WD_FRAMERECT_BOTTOM;
 	}
 

src/saveload/industry_sl.cpp

@@ -72,6 +72,7 @@ static const SaveLoad _industry_desc[] = {
 
 	SLE_CONDNULL(1, SLV_82, SLV_197), // random_triggers
 	SLE_CONDVAR(Industry, random,                     SLE_UINT16,                SLV_82, SL_MAX_VERSION),
+	SLE_CONDSSTR(Industry, text,     SLE_STR | SLF_ALLOW_CONTROL,     SLV_INDUSTRY_TEXT, SL_MAX_VERSION),
 
 	SLE_CONDNULL(32, SLV_2, SLV_144), // old reserved space
 

src/saveload/saveload.h

@@ -323,6 +323,7 @@ enum SaveLoadVersion : uint16 {
 
 	SLV_GS_INDUSTRY_CONTROL,                ///< 287  PR#7912 and PR#8115 GS industry control.
 	SLV_VEH_MOTION_COUNTER,                 ///< 288  PR#8591 Desync safe motion counter
+	SLV_INDUSTRY_TEXT,                      ///< 289  PR#8576 Additional GS text for industries.
 
 	SL_MAX_VERSION,                         ///< Highest possible saveload version
 };

src/script/api/game_changelog.hpp

@@ -30,6 +30,7 @@
  * \li GSIndustry::SetControlFlags
  * \li GSIndustry::SetExclusiveConsumer
  * \li GSIndustry::SetExclusiveSupplier
+ * \li GSIndustry::SetText
  * \li GSStoryPage::MakePushButtonReference
  * \li GSStoryPage::MakeTileButtonReference
  * \li GSStoryPage::MakeVehicleButtonReference

src/script/api/script_industry.cpp

@@ -15,6 +15,7 @@
 #include "script_map.hpp"
 #include "../../company_base.h"
 #include "../../industry.h"
+#include "../../string_func.h"
 #include "../../strings_func.h"
 #include "../../station_base.h"
 #include "../../newgrf_industries.h"
@@ -47,6 +48,20 @@
 	return GetString(STR_INDUSTRY_NAME);
 }
 
+/* static */ bool ScriptIndustry::SetText(IndustryID industry_id, Text *text)
+{
+	CCountedPtr<Text> counter(text);
+
+	const char *encoded_text = nullptr;
+	if (text != nullptr) {
+		encoded_text = text->GetEncodedText();
+		EnforcePreconditionEncodedText(false, encoded_text);
+	}
+	EnforcePrecondition(false, IsValidIndustry(industry_id));
+
+	return ScriptObject::DoCommand(0, industry_id, static_cast<uint32>(IndustryAction::SetText), CMD_INDUSTRY_CTRL, encoded_text);
+}
+
 /* static */ ScriptIndustry::CargoAcceptState ScriptIndustry::IsCargoAccepted(IndustryID industry_id, CargoID cargo_id)
 {
 	if (!IsValidIndustry(industry_id)) return CAS_NOT_ACCEPTED;

src/script/api/script_industry.hpp

@@ -81,6 +81,16 @@ public:
 	 */
 	static char *GetName(IndustryID industry_id);
 
+	/**
+	 * Set the custom text of an industry, shown in the GUI.
+	 * @param industry_id The industry to set the custom text of.
+	 * @param text The text to set it to (can be either a raw string, or a ScriptText object). If null is passed, the text will be removed.
+	 * @pre IsValidIndustry(industry_id).
+	 * @return True if the action succeeded.
+	 * @api -ai
+	 */
+	static bool SetText(IndustryID industry_id, Text *text);
+
 	/**
 	 * See whether an industry currently accepts a certain cargo.
 	 * @param industry_id The index of the industry.