1 files changed, 62 insertions, 0 deletions

diff --git a/src/cuchaz/enigma/gui/SourceFormatter.java b/src/cuchaz/enigma/gui/SourceFormatter.java
new file mode 100644
index 0000000..f387840
--- /dev/null
+++ b/src/cuchaz/enigma/gui/SourceFormatter.java
@@ -0,0 +1,62 @@
+/*******************************************************************************
+ * Copyright (c) 2014 Jeff Martin.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the GNU Public License v3.0
+ * which accompanies this distribution, and is available at
+ * http://www.gnu.org/licenses/gpl.html
+ * 
+ * Contributors:
+ *     Jeff Martin - initial API and implementation
+ ******************************************************************************/
+package cuchaz.enigma.gui;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.StringReader;
+
+public class SourceFormatter
+{
+        public static String format( String in )
+        {
+                return collapseNewlines( in );
+        }
+        
+        private static String collapseNewlines( String in )
+        {
+                StringBuffer buf = new StringBuffer();
+                int numBlankLines = 0;
+                
+                BufferedReader reader = new BufferedReader( new StringReader( in ) );
+                String line = null;
+                try
+                {
+                        while( ( line = reader.readLine() ) != null )
+                        {
+                                // how blank lines is this?
+                                boolean isBlank = line.trim().length() == 0;
+                                if( isBlank )
+                                {
+                                        numBlankLines++;
+                                        
+                                        // stop printing blank lines after the first one
+                                        if( numBlankLines < 2 )
+                                        {
+                                                buf.append( line );
+                                                buf.append( "\n" );
+                                        }
+                                }
+                                else
+                                {
+                                        numBlankLines = 0;
+                                        buf.append( line );
+                                        buf.append( "\n" );
+                                }
+                        }
+                }
+                catch( IOException ex )
+                {
+                        // StringReader will never throw an IOExecption here...
+                }
+                return buf.toString();
+        }
+}