add barebones plugin framework, cleanup

1 files changed, 20 insertions, 1 deletions

diff --git a/src/main/java/cuchaz/enigma/analysis/Token.java b/src/main/java/cuchaz/enigma/analysis/Token.java
index 266d202..14fa7ca 100644
--- a/src/main/java/cuchaz/enigma/analysis/Token.java
+++ b/src/main/java/cuchaz/enigma/analysis/Token.java
@@ -25,6 +25,25 @@ public class Token implements Comparable<Token> {
                 }
         }
 
+        public int getRenameOffset(String to) {
+                int length = this.end - this.start;
+                return to.length() - length;
+        }
+
+        public String rename(String source, String to) {
+                int oldEnd = this.end;
+                this.text = to;
+                this.end = this.start + to.length();
+
+                return source.substring(0, this.start) + to + source.substring(oldEnd);
+        }
+
+        public Token move(int offset) {
+                Token token = new Token(this.start + offset, this.end + offset, null);
+                token.text = text;
+                return token;
+        }
+
         public boolean contains(int pos) {
                 return pos >= start && pos <= end;
         }
@@ -41,7 +60,7 @@ public class Token implements Comparable<Token> {
 
         @Override
         public int hashCode() {
-                return Integer.hashCode(start) + Integer.hashCode(end) + (text != null ? text.hashCode() : 0);
+                return start * 37 + end;
         }
 
         public boolean equals(Token other) {