color hashing of groups

pub/code/reverted_pim_links.user.js

@@ -12,8 +12,6 @@
  * todo
  * 	generate the data store on demand
  * 		check link_extractor/revertingpimlinks.sh
- * 	change background-color based on a hash of the group
- * 		within bound of readable values
  *
  * add links to the database
  * 	note that date is optional but the source is not
@@ -35,6 +33,18 @@ for SCANNETWORK in $(ls ~/irclogs/); do echo -n -e "$SCANNETWORK\t" && grep http
  *
  */
 
+String.prototype.ColorHash = function(){
+	var hash = 0;
+	if (this.length == 0) return hash;
+	for (i = 0; i < this.length; i++) { 
+		char = this.charCodeAt(i); 
+		hash = ((hash<<5)-hash)+char; 
+		hash = hash & hash; // Convert to 32bit integer 
+	} 
+	hash = Math.round(Math.sqrt(Math.abs(hash))); // How to convert to 16bit integer?
+	return hash; 
+	// suppose to send back a correct HTML color value 
+}
 
 // configuration
 var script_name = "rPIMlinks";
@@ -63,8 +73,14 @@ if (PIMpages != "fail")
 	var myDiv = document.createElement('div');
 	myDiv.id = "GM_PIM_Window";
 	while (page = pages.shift()){
+		grouppage = page.split(".");
+		group = grouppage[0];
+		page = grouppage[1];
 		myDiv.innerHTML += "<p class=\"GM_PIM_link\">"
-		+"<a href=\""+PIM_URL+page+"\">"+page+"</a>"
+		+"<a href=\""+PIM_URL+group+"/"+page+"\">"
+		+"<font color=\""+group.ColorHash()+"\">"+group+"</font>/"
+		+"<font color=\"white\">"+page+"</font>/"
+		+"</a>"
 		+"<sup><a href=\""+PIM_URL+page+"?action=edit\">[e]</a></sup>"
 		+"</p>";
 	}
@@ -111,8 +127,6 @@ function unregisterShortcuts() {
 
 registerShortcuts();
 
-$x('//input | //textarea | //select').forEach(registerListener);
-
 function registerListener(node) { 
 	node.addEventListener("mouseover", function() { 
 			unregisterShortcuts();