Generate unique foreground for each user

application/CayaUtils.cpp

@@ -177,6 +177,32 @@ CayaTintColor(rgb_color color, int severity)
 }
 
 
+rgb_color
+CayaForegroundColor(rgb_color background)
+{
+	rgb_color foreground;
+	int32 brighter;
+	int32 darker;
+	float ratio;
+
+	do {
+		foreground.set_to(rand() % 255, rand() % 255, rand() %255);
+		if (foreground.Brightness() > background.Brightness()) {
+			brighter = foreground.Brightness();
+			darker = background.Brightness();
+		}
+		else {
+			brighter = background.Brightness();
+			darker = foreground.Brightness();
+		}
+		ratio = (brighter + .05) / (darker + .05);
+	}
+	while (ratio > 5 || ratio < 4);
+
+	return foreground;
+}
+
+
 status_t
 ReadAttributeData(BNode* node, const char* name, char** buffer, int32 *size) {
 		attr_info info;

application/CayaUtils.h

@@ -25,6 +25,7 @@ const char* CayaCachePath();
 const char* CayaLogPath(const char* signature, const char* subsignature);
 
 rgb_color	CayaTintColor(rgb_color color, int severity);
+rgb_color	CayaForegroundColor(rgb_color background);
 
 // Borrowed from BePodder's own libfunky
 status_t	ReadAttributeData(BNode* node, const char* name, char** buffer, int32 *size);

application/User.cpp

@@ -29,6 +29,7 @@ User::User(BString id, BMessenger msgn)
 	fMessenger(msgn),
 	fLooper(NULL),
 	fListItem(NULL),
+	fItemColor(CayaForegroundColor(ui_color(B_LIST_BACKGROUND_COLOR))),
 	fStatus(CAYA_OFFLINE),
 	fPopUp(NULL)
 {

application/User.h

@@ -63,6 +63,8 @@ public:
 
 	ChatMap			Conversations();
 
+	rgb_color		fItemColor;
+
 protected:
 	BMessenger		fMessenger;
 	ProtocolLooper*	fLooper;