This will be a Hop Skin when it grows up.

src/helma/framework/core/Skin.java

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+// Skin.java
+// Copyright (c) Hannes Wallnöfer 2001
+ 
+package helma.framework.core;
+
+import java.util.*;
+import java.io.*;
+import helma.framework.*;
+import FESI.Data.*;
+
+
+/**
+ * This represents a HOP skin, i.e. a template created from JavaScript. It uses the request path array
+ * from the RequestEvaluator object to resolve dynamic tokens.
+ */
+
+public class Skin {
+
+    Object[] parts;
+
+    public Skin (String content) {
+	parse (content);
+    }
+
+    public void parse (String content) {
+
+	Vector partBuffer = new Vector ();
+	int l = content.length ();
+	char cnt[] = new char[l];
+	content.getChars (0, l, cnt, 0);
+
+	int lastIdx = 0;
+	for (int i = 0; i < l-1; i++) {
+	    if (cnt[i] == '<' && cnt[i+1] == '%') {
+	        int j = i+2;
+	        while (j < l-1 && (cnt[j] != '%' || cnt[j+1] != '>')) {
+	            j++;
+	        }
+	        if (j > i+2) {
+	            if (i - lastIdx > 0)
+	                partBuffer.addElement (new String (cnt, lastIdx, i - lastIdx));
+	            String macrotext = new String (cnt, i+2, (j-i)-2);
+	            partBuffer.addElement (new Macro (macrotext));
+	            lastIdx = j+2;
+	        }
+	        i = j+1;
+	    }
+	}
+	if (lastIdx < l)
+	    partBuffer.addElement (new String (cnt, lastIdx, l - lastIdx));
+
+             parts = partBuffer.toArray ();
+   }
+
+    public String toString () {
+	if (parts == null)
+	    return "";
+	StringBuffer b = new StringBuffer ();
+	for (int i=0; i<parts.length; i++)
+	    b.append (parts[i]);
+	return b.toString ();
+    }
+
+
+    class Macro {
+
+	String handler;
+	String name;
+	HashMap parameters;
+
+	public Macro (String str) {
+	    int dot = str.indexOf (".");
+	    if (dot < 0) {
+	        handler = null;
+	        name = str;
+	    } else {
+	        handler = str.substring (0, dot);
+	        name = str.substring (dot+1);
+	    }
+	}
+
+
+	public String toString () {
+	    return "[HopMacro: "+handler+","+name+"]";
+	}
+
+    }
+
+
+}
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