Tracerestrict: Add program append management action.

src/lang/english.txt

@@ -2465,6 +2465,7 @@ STR_TRACE_RESTRICT_INSERT                                       :{BLACK}Insert
 STR_TRACE_RESTRICT_REMOVE                                       :{BLACK}Remove
 STR_TRACE_RESTRICT_RESET                                        :{BLACK}Reset
 STR_TRACE_RESTRICT_COPY                                         :{BLACK}Copy
+STR_TRACE_RESTRICT_APPEND                                       :{BLACK}Append
 STR_TRACE_RESTRICT_SHARE                                        :{BLACK}Share
 STR_TRACE_RESTRICT_UNSHARE                                      :{BLACK}Unshare
 STR_TRACE_RESTRICT_SELECT_TARGET                                :{BLACK}Select Target
@@ -2472,7 +2473,7 @@ STR_TRACE_RESTRICT_SELECT_SIGNAL                                :{BLACK}Select S
 STR_TRACE_RESTRICT_INSERT_TOOLTIP                               :{BLACK}Insert an instruction
 STR_TRACE_RESTRICT_REMOVE_TOOLTIP                               :{BLACK}Remove the selected instruction{}Ctrl+Click to remove the selected conditional instruction but retain its contents
 STR_TRACE_RESTRICT_RESET_TOOLTIP                                :{BLACK}Reset the current signal (without affecting shared programs)
-STR_TRACE_RESTRICT_COPY_TOOLTIP                                 :{BLACK}Copy program from another signal
+STR_TRACE_RESTRICT_COPY_TOOLTIP                                 :{BLACK}Copy program from another signal{}Ctrl+click to append program from another signal
 STR_TRACE_RESTRICT_SHARE_TOOLTIP                                :{BLACK}Share program with another signal
 STR_TRACE_RESTRICT_UNSHARE_TOOLTIP                              :{BLACK}Stop sharing program with other signals, create a copy of the program
 STR_TRACE_RESTRICT_SIGNAL_GUI_TOOLTIP                           :{BLACK}Routefinding restriction
@@ -2495,6 +2496,7 @@ STR_TRACE_RESTRICT_ERROR_VALIDATE_UNKNOWN_INSTRUCTION           :Validation fail
 STR_TRACE_RESTRICT_ERROR_SOURCE_SAME_AS_TARGET                  :Source and target signals are the same
 STR_TRACE_RESTRICT_ERROR_CAN_T_RESET_SIGNAL                     :{WHITE}Can't reset signal
 STR_TRACE_RESTRICT_ERROR_CAN_T_COPY_PROGRAM                     :{WHITE}Can't copy program
+STR_TRACE_RESTRICT_ERROR_CAN_T_COPY_APPEND_PROGRAM              :{WHITE}Can't append program
 STR_TRACE_RESTRICT_ERROR_CAN_T_SHARE_PROGRAM                    :{WHITE}Can't share program
 STR_TRACE_RESTRICT_ERROR_CAN_T_UNSHARE_PROGRAM                  :{WHITE}Can't unshare program
 

src/tracerestrict.cpp

@@ -1167,7 +1167,8 @@ CommandCost CmdProgramSignalTraceRestrictProgMgmt(TileIndex tile, DoCommandFlag
 		if (self == source) {
 			return_cmd_error(STR_TRACE_RESTRICT_ERROR_SOURCE_SAME_AS_TARGET);
 		}
-
+	}
+	if (type == TRDCT_PROG_SHARE || type == TRDCT_PROG_COPY || type == TRDCT_PROG_COPY_APPEND) {
 		ret = TraceRestrictCheckTileIsUsable(source_tile, source_track);
 		if (ret.Failed()) {
 			return ret;
@@ -1199,6 +1200,21 @@ CommandCost CmdProgramSignalTraceRestrictProgMgmt(TileIndex tile, DoCommandFlag
 			break;
 		}
 
+		case TRDCT_PROG_COPY_APPEND: {
+			TraceRestrictProgram *source_prog = GetTraceRestrictProgram(source, false);
+			if (source_prog && !source_prog->items.empty()) {
+				TraceRestrictProgram *prog = GetTraceRestrictProgram(self, true);
+				if (!prog) {
+					// allocation failed
+					return CMD_ERROR;
+				}
+				prog->items.reserve(prog->items.size() + source_prog->items.size()); // this is in case prog == source_prog
+				prog->items.insert(prog->items.end(), source_prog->items.begin(), source_prog->items.end()); // append
+				prog->Validate();
+			}
+			break;
+		}
+
 		case TRDCT_PROG_SHARE: {
 			TraceRestrictRemoveProgramMapping(self);
 			TraceRestrictProgram *source_prog = GetTraceRestrictProgram(source, true);

src/tracerestrict.h

@@ -632,6 +632,7 @@ enum TraceRestrictDoCommandType {
 	TRDCT_MOVE_ITEM,                         ///< move instruction or block at offset field
 
 	TRDCT_PROG_COPY,                         ///< copy program operation. Do not re-order this with respect to other values
+	TRDCT_PROG_COPY_APPEND,                  ///< copy and append program operation
 	TRDCT_PROG_SHARE,                        ///< share program operation
 	TRDCT_PROG_UNSHARE,                      ///< unshare program (copy as a new program)
 	TRDCT_PROG_RESET,                        ///< reset program state of signal

src/tracerestrict_gui.cpp

@@ -50,6 +50,7 @@ enum TraceRestrictWindowWidgets {
 	TR_WIDGET_SEL_TOP_MIDDLE,
 	TR_WIDGET_SEL_TOP_RIGHT,
 	TR_WIDGET_SEL_SHARE,
+	TR_WIDGET_SEL_COPY,
 
 	TR_WIDGET_UP_BTN,
 	TR_WIDGET_DOWN_BTN,
@@ -74,6 +75,7 @@ enum TraceRestrictWindowWidgets {
 	TR_WIDGET_REMOVE,
 	TR_WIDGET_RESET,
 	TR_WIDGET_COPY,
+	TR_WIDGET_COPY_APPEND,
 	TR_WIDGET_SHARE,
 	TR_WIDGET_UNSHARE,
 };
@@ -104,6 +106,10 @@ enum PanelWidgets {
 	// Share
 	DPS_SHARE = 0,
 	DPS_UNSHARE,
+
+	// Copy
+	DPC_COPY = 0,
+	DPC_APPEND,
 };
 
 /**
@@ -1191,6 +1197,7 @@ public:
 			}
 
 			case TR_WIDGET_COPY:
+			case TR_WIDGET_COPY_APPEND:
 			case TR_WIDGET_SHARE:
 				SetObjectToPlaceAction(widget, ANIMCURSOR_BUILDSIGNALS);
 				break;
@@ -1353,6 +1360,10 @@ public:
 				OnPlaceObjectSignal(pt, tile, widget, STR_TRACE_RESTRICT_ERROR_CAN_T_COPY_PROGRAM);
 				break;
 
+			case TR_WIDGET_COPY_APPEND:
+				OnPlaceObjectSignal(pt, tile, widget, STR_TRACE_RESTRICT_ERROR_CAN_T_COPY_APPEND_PROGRAM);
+				break;
+
 			case TR_WIDGET_SHARE:
 				OnPlaceObjectSignal(pt, tile, widget, STR_TRACE_RESTRICT_ERROR_CAN_T_SHARE_PROGRAM);
 				break;
@@ -1411,6 +1422,11 @@ public:
 						source_tile, source_track, STR_TRACE_RESTRICT_ERROR_CAN_T_COPY_PROGRAM);
 				break;
 
+			case TR_WIDGET_COPY_APPEND:
+				TraceRestrictProgMgmtWithSourceDoCommandP(this->tile, this->track, TRDCT_PROG_COPY_APPEND,
+						source_tile, source_track, STR_TRACE_RESTRICT_ERROR_CAN_T_COPY_APPEND_PROGRAM);
+				break;
+
 			case TR_WIDGET_SHARE:
 				TraceRestrictProgMgmtWithSourceDoCommandP(this->tile, this->track, TRDCT_PROG_SHARE,
 						source_tile, source_track, STR_TRACE_RESTRICT_ERROR_CAN_T_SHARE_PROGRAM);
@@ -1782,6 +1798,7 @@ private:
 		NWidgetStacked *middle_sel = this->GetWidget<NWidgetStacked>(TR_WIDGET_SEL_TOP_MIDDLE);
 		NWidgetStacked *right_sel  = this->GetWidget<NWidgetStacked>(TR_WIDGET_SEL_TOP_RIGHT);
 		NWidgetStacked *share_sel  = this->GetWidget<NWidgetStacked>(TR_WIDGET_SEL_SHARE);
+		NWidgetStacked *copy_sel  = this->GetWidget<NWidgetStacked>(TR_WIDGET_SEL_COPY);
 
 		this->DisableWidget(TR_WIDGET_TYPE_COND);
 		this->DisableWidget(TR_WIDGET_TYPE_NONCOND);
@@ -1808,11 +1825,14 @@ private:
 		this->DisableWidget(TR_WIDGET_UP_BTN);
 		this->DisableWidget(TR_WIDGET_DOWN_BTN);
 
+		this->EnableWidget(TR_WIDGET_COPY_APPEND);
+
 		left_2_sel->SetDisplayedPlane(DPL2_BLANK);
 		left_sel->SetDisplayedPlane(DPL_BLANK);
 		middle_sel->SetDisplayedPlane(DPM_BLANK);
 		right_sel->SetDisplayedPlane(DPR_BLANK);
 		share_sel->SetDisplayedPlane(DPS_SHARE);
+		copy_sel->SetDisplayedPlane(_ctrl_pressed ? DPC_APPEND : DPC_COPY);
 
 		const TraceRestrictProgram *prog = this->GetProgram();
 
@@ -2178,8 +2198,12 @@ static const NWidgetPart _nested_program_widgets[] = {
 														SetDataTip(STR_TRACE_RESTRICT_REMOVE, STR_TRACE_RESTRICT_REMOVE_TOOLTIP), SetResize(1, 0),
 				NWidget(WWT_TEXTBTN, COLOUR_GREY, TR_WIDGET_RESET), SetMinimalSize(124, 12), SetFill(1, 0),
 														SetDataTip(STR_TRACE_RESTRICT_RESET, STR_TRACE_RESTRICT_RESET_TOOLTIP), SetResize(1, 0),
+				NWidget(NWID_SELECTION, INVALID_COLOUR, TR_WIDGET_SEL_COPY),
 					NWidget(WWT_TEXTBTN, COLOUR_GREY, TR_WIDGET_COPY), SetMinimalSize(124, 12), SetFill(1, 0),
 														SetDataTip(STR_TRACE_RESTRICT_COPY, STR_TRACE_RESTRICT_COPY_TOOLTIP), SetResize(1, 0),
+					NWidget(WWT_TEXTBTN, COLOUR_GREY, TR_WIDGET_COPY_APPEND), SetMinimalSize(124, 12), SetFill(1, 0),
+														SetDataTip(STR_TRACE_RESTRICT_APPEND, STR_TRACE_RESTRICT_COPY_TOOLTIP), SetResize(1, 0),
+				EndContainer(),
 				NWidget(NWID_SELECTION, INVALID_COLOUR, TR_WIDGET_SEL_SHARE),
 					NWidget(WWT_TEXTBTN, COLOUR_GREY, TR_WIDGET_SHARE), SetMinimalSize(124, 12), SetFill(1, 0),
 														SetDataTip(STR_TRACE_RESTRICT_SHARE, STR_TRACE_RESTRICT_SHARE_TOOLTIP), SetResize(1, 0),