From ac500f4a786d975b492cc879bf6195a066b0a398 Mon Sep 17 00:00:00 2001
From: tomsmeding <tom.smeding@gmail.com>
Date: Sun, 19 Mar 2017 11:27:32 +0100
Subject: Add colours to terminal sim output

---
 screenbuffer.cpp | 41 +++++++++++++++++++++++++++++++++--------
 screenbuffer.h   | 18 +++++++++++++++++-
 world.cpp        | 14 ++++++++++++++
 3 files changed, 64 insertions(+), 9 deletions(-)

diff --git a/screenbuffer.cpp b/screenbuffer.cpp
index d224181..781e646 100644
--- a/screenbuffer.cpp
+++ b/screenbuffer.cpp
@@ -10,6 +10,15 @@
 using namespace std;
 
 
+bool operator!=(const ScreenBuffer::Style &a,const ScreenBuffer::Style &b){
+	return memcmp(&a,&b,sizeof(ScreenBuffer::Style))!=0;
+}
+
+bool operator!=(const ScreenBuffer::Cell &a,const ScreenBuffer::Cell &b){
+	return memcmp(&a,&b,sizeof(ScreenBuffer::Cell))!=0;
+}
+
+
 static void initTerminal(){
 	cout<<"\x1B[?1049h"  // start alternate screen
 	      "\x1B[2J"  // clear screen
@@ -25,10 +34,8 @@ static void deinitTerminal(){
 
 ScreenBuffer::ScreenBuffer(int W,int H)
 		:W(W),H(H){
-	screen=new char[W*H];
-	prevscreen=new char[W*H];
-	memset(screen,' ',W*H);
-	memset(prevscreen,' ',W*H);
+	screen=new Cell[W*H];
+	prevscreen=new Cell[W*H];
 	initTerminal();
 }
 
@@ -56,7 +63,8 @@ void ScreenBuffer::printstr(const char *buf){
 				curx=basex;
 				cury++;
 			}
-			screen[W*cury+curx]=buf[i];
+			screen[W*cury+curx].c=buf[i];
+			screen[W*cury+curx].style=curstyle;
 			curx++;
 		} else {
 			if(cury==H-1)break;
@@ -103,6 +111,16 @@ int ScreenBuffer::mvprintf(int x,int y,const char *format,...){
 	return ret;
 }
 
+void ScreenBuffer::setfg(int fg){
+	assert((fg>=0&&fg<=7)||fg==9);
+	curstyle.fg=fg;
+}
+
+void ScreenBuffer::setbg(int bg){
+	assert((bg>=0&&bg<=7)||bg==9);
+	curstyle.bg=bg;
+}
+
 void ScreenBuffer::draw(){
 	bool changed[W*H];
 	for(int i=0;i<W*H;i++){
@@ -116,6 +134,8 @@ void ScreenBuffer::draw(){
 
 	bool prepped=false;
 
+	Style termstyle;
+
 	for(int y=0;y<H;y++){
 		bool needtomove=true;
 		for(int x=0;x<W;x++){
@@ -124,14 +144,19 @@ void ScreenBuffer::draw(){
 				continue;
 			}
 			if(!prepped){
-				cout<<"\x1B[?25l";  // invisible cursor
+				cout<<"\x1B[?25l"  // invisible cursor
+				      "\x1B[0m";  // reset style
 				prepped=true;
 			}
 			if(needtomove){
 				cout<<"\x1B["<<y+1<<';'<<x+1<<'H';
 				needtomove=false;
 			}
-			cout.put(screen[W*y+x]);
+			if(screen[W*y+x].style!=termstyle){
+				cout<<"\x1B[0;3"<<screen[W*y+x].style.fg<<";4"<<screen[W*y+x].style.bg<<"m";
+				termstyle=screen[W*y+x].style;
+			}
+			cout.put(screen[W*y+x].c);
 		}
 	}
 	if(prepped){
@@ -140,7 +165,7 @@ void ScreenBuffer::draw(){
 		    <<flush;
 	}
 
-	memcpy(prevscreen,screen,W*H);
+	memcpy(prevscreen,screen,W*H*sizeof(Cell));
 }
 
 void ScreenBuffer::emergencyDeinit(){
diff --git a/screenbuffer.h b/screenbuffer.h
index 7a2883e..a461145 100644
--- a/screenbuffer.h
+++ b/screenbuffer.h
@@ -6,13 +6,26 @@ using namespace std;
 
 
 class ScreenBuffer{
+	struct Style{
+		int fg=9,bg=9;
+	};
+
+	struct Cell{
+		char c=' ';
+		Style style;
+	};
+
 	int W,H;
-	char *prevscreen,*screen;
+	Cell *prevscreen,*screen;
 	int curx=0,cury=0;
+	Style curstyle;
 
 	void printstr(const char *buf);
 	int printf_varargs(const char *format,va_list ap);
 
+	friend bool operator!=(const ScreenBuffer::Style &a,const ScreenBuffer::Style &b);
+	friend bool operator!=(const ScreenBuffer::Cell &a,const ScreenBuffer::Cell &b);
+
 public:
 	ScreenBuffer(int W,int H);
 	~ScreenBuffer();
@@ -21,6 +34,9 @@ public:
 	int printf(const char *format,...) __attribute__((format (printf, 2, 3)));
 	int mvprintf(int x,int y,const char *format,...) __attribute__((format (printf, 4, 5)));
 
+	void setfg(int fg);
+	void setbg(int bg);
+
 	void draw();
 
 	void emergencyDeinit();
diff --git a/world.cpp b/world.cpp
index 5d82073..1d5efa3 100644
--- a/world.cpp
+++ b/world.cpp
@@ -1,6 +1,7 @@
 #include <cstdlib>
 #include <cassert>
 #include <cstring>
+#include <unordered_map>
 
 #include "world.h"
 
@@ -351,6 +352,17 @@ Robot* World::targetbot(const Robot *r){
 	return *targetbotptr(r);
 }
 
+static int colourCode(const Team *team){
+	static unordered_map<const Team*,int> mappings;
+	static int nextCode=1;
+	auto it=mappings.find(team);
+	if(it!=mappings.end())return it->second;
+	int code=nextCode;
+	mappings[team]=code;
+	nextCode=nextCode%6+1;
+	return code;
+}
+
 void World::print(ScreenBuffer &sb) const {
 	for(int y=0;y<SIZE;y++){
 		sb.moveto(0,y);
@@ -359,7 +371,9 @@ void World::print(ScreenBuffer &sb) const {
 			else {
 				char c2="^>v<"[board[y][x]->heading%4];
 				char c1=board[y][x]->active?c2:'X';
+				sb.setfg(colourCode(board[y][x]->team));
 				sb.printf("%c%c",c1,c2);
+				sb.setfg(9);
 			}
 			sb.printf(" ");
 		}
-- 
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