decompiler: move generated lines as it is stated in debug line table (disabled for now)

src/org/jetbrains/java/decompiler/main/ClassWriter.java

@@ -76,7 +76,7 @@ public class ClassWriter {
     }
   }
 
-  public void classLambdaToJava(ClassNode node, StringBuilder buffer, Exprent method_object, int indent) {
+  public void classLambdaToJava(ClassNode node, TextBuffer buffer, Exprent method_object, int indent) {
     // get the class node with the content method
     ClassNode classNode = node;
     while (classNode != null && classNode.type == ClassNode.CLASS_LAMBDA) {
@@ -160,7 +160,7 @@ public class ClassWriter {
     DecompilerContext.getLogger().endWriteClass();
   }
 
-  public void classToJava(ClassNode node, StringBuilder buffer, int indent) {
+  public void classToJava(ClassNode node, TextBuffer buffer, int indent) {
     ClassNode outerNode = (ClassNode)DecompilerContext.getProperty(DecompilerContext.CURRENT_CLASS_NODE);
     DecompilerContext.setProperty(DecompilerContext.CURRENT_CLASS_NODE, node);
 
@@ -279,7 +279,7 @@ public class ClassWriter {
     DecompilerContext.getLogger().endWriteClass();
   }
 
-  private void writeClassDefinition(ClassNode node, StringBuilder buffer, int indent) {
+  private void writeClassDefinition(ClassNode node, TextBuffer buffer, int indent) {
     String lineSeparator = DecompilerContext.getNewLineSeparator();
     String indentString = InterpreterUtil.getIndentString(indent);
 
@@ -390,7 +390,7 @@ public class ClassWriter {
     buffer.append(lineSeparator);
   }
 
-  private void fieldToJava(ClassWrapper wrapper, StructClass cl, StructField fd, StringBuilder buffer, int indent, BytecodeMappingTracer tracer) {
+  private void fieldToJava(ClassWrapper wrapper, StructClass cl, StructField fd, TextBuffer buffer, int indent, BytecodeMappingTracer tracer) {
     String indentString = InterpreterUtil.getIndentString(indent);
     String lineSeparator = DecompilerContext.getNewLineSeparator();
 
@@ -479,7 +479,7 @@ public class ClassWriter {
   private static void methodLambdaToJava(ClassNode lambdaNode,
                                          ClassNode classNode,
                                          StructMethod mt,
-                                         StringBuilder buffer,
+                                         TextBuffer buffer,
                                          int indent,
                                          boolean codeOnly, BytecodeMappingTracer tracer) {
     ClassWrapper classWrapper = classNode.wrapper;
@@ -565,7 +565,7 @@ public class ClassWriter {
     }
   }
 
-  private boolean methodToJava(ClassNode node, StructMethod mt, StringBuilder buffer, int indent, BytecodeMappingTracer tracer) {
+  private boolean methodToJava(ClassNode node, StructMethod mt, TextBuffer buffer, int indent, BytecodeMappingTracer tracer) {
     ClassWrapper wrapper = node.wrapper;
     StructClass cl = wrapper.getClassStruct();
     MethodWrapper methodWrapper = wrapper.getMethodWrapper(mt.getName(), mt.getDescriptor());
@@ -586,6 +586,15 @@ public class ClassWriter {
       boolean isDeprecated = mt.getAttributes().containsKey("Deprecated");
       boolean clinit = false, init = false, dinit = false;
 
+      int startLine = -1;
+      if (DecompilerContext.getOption(IFernflowerPreferences.USE_DEBUG_LINE_NUMBERS)) {
+        StructLineNumberTableAttribute lineNumberTable =
+          (StructLineNumberTableAttribute)mt.getAttributes().getWithKey(StructGeneralAttribute.ATTRIBUTE_LINE_NUMBER_TABLE);
+        if (lineNumberTable != null) {
+          startLine = lineNumberTable.getFirstLine();
+        }
+      }
+
       MethodDescriptor md = MethodDescriptor.parseDescriptor(mt.getDescriptor());
 
       int flags = mt.getAccessFlags();
@@ -800,6 +809,8 @@ public class ClassWriter {
           buffer.append(' ');
         }
 
+        //TODO: for now only start line set
+        buffer.setCurrentLine(startLine);
         buffer.append('{');
         buffer.append(lineSeparator);
 
@@ -861,13 +872,13 @@ public class ClassWriter {
     return true;
   }
 
-  private static void appendDeprecation(StringBuilder buffer, String indentString, String lineSeparator) {
+  private static void appendDeprecation(TextBuffer buffer, String indentString, String lineSeparator) {
     buffer.append(indentString).append("/** @deprecated */").append(lineSeparator);
   }
 
   private enum MType {CLASS, FIELD, METHOD}
 
-  private static void appendRenameComment(StringBuilder buffer, String oldName, MType type, int indent, String lineSeparator) {
+  private static void appendRenameComment(TextBuffer buffer, String oldName, MType type, int indent, String lineSeparator) {
     if (oldName == null) return;
 
     InterpreterUtil.appendIndent(buffer, indent);
@@ -915,14 +926,14 @@ public class ClassWriter {
     return typeText;
   }
 
-  private static void appendComment(StringBuilder buffer, String comment, String indentString, String lineSeparator) {
+  private static void appendComment(TextBuffer buffer, String comment, String indentString, String lineSeparator) {
     buffer.append(indentString).append("// $FF: ").append(comment).append(lineSeparator);
   }
 
   private static final String[] ANNOTATION_ATTRIBUTES = {
     StructGeneralAttribute.ATTRIBUTE_RUNTIME_VISIBLE_ANNOTATIONS, StructGeneralAttribute.ATTRIBUTE_RUNTIME_INVISIBLE_ANNOTATIONS};
 
-  private static void appendAnnotations(StringBuilder buffer, StructMember mb, int indent, String lineSeparator) {
+  private static void appendAnnotations(TextBuffer buffer, StructMember mb, int indent, String lineSeparator) {
 
     BytecodeMappingTracer tracer_dummy = new BytecodeMappingTracer(); // FIXME: replace with a real one
 
@@ -939,7 +950,7 @@ public class ClassWriter {
   private static final String[] PARAMETER_ANNOTATION_ATTRIBUTES = {
     StructGeneralAttribute.ATTRIBUTE_RUNTIME_VISIBLE_PARAMETER_ANNOTATIONS, StructGeneralAttribute.ATTRIBUTE_RUNTIME_INVISIBLE_PARAMETER_ANNOTATIONS};
 
-  private static void appendParameterAnnotations(StringBuilder buffer, StructMethod mt, int param) {
+  private static void appendParameterAnnotations(TextBuffer buffer, StructMethod mt, int param) {
 
     BytecodeMappingTracer tracer_dummy = new BytecodeMappingTracer(); // FIXME: replace with a real one
 
@@ -984,7 +995,7 @@ public class ClassWriter {
   private static final int FIELD_EXCLUDED = CodeConstants.ACC_PUBLIC | CodeConstants.ACC_STATIC | CodeConstants.ACC_FINAL;
   private static final int METHOD_EXCLUDED = CodeConstants.ACC_PUBLIC | CodeConstants.ACC_ABSTRACT;
 
-  private static void appendModifiers(StringBuilder buffer, int flags, int allowed, boolean isInterface, int excluded) {
+  private static void appendModifiers(TextBuffer buffer, int flags, int allowed, boolean isInterface, int excluded) {
     flags &= allowed;
     if (!isInterface) excluded = 0;
     for (int modifier : MODIFIERS.keySet()) {
@@ -994,7 +1005,7 @@ public class ClassWriter {
     }
   }
 
-  private static void appendTypeParameters(StringBuilder buffer, List<String> parameters, List<List<GenericType>> bounds) {
+  private static void appendTypeParameters(TextBuffer buffer, List<String> parameters, List<List<GenericType>> bounds) {
     buffer.append('<');
 
     for (int i = 0; i < parameters.size(); i++) {

src/org/jetbrains/java/decompiler/main/ClassesProcessor.java

@@ -236,7 +236,7 @@ public class ClassesProcessor {
     }
   }
 
-  public void writeClass(StructClass cl, StringBuilder buffer) throws IOException {
+  public void writeClass(StructClass cl, TextBuffer buffer) throws IOException {
     ClassNode root = mapRootClasses.get(cl.qualifiedName);
     if (root.type != ClassNode.CLASS_ROOT) {
       return;
@@ -260,7 +260,7 @@ public class ClassesProcessor {
 
       new NestedMemberAccess().propagateMemberAccess(root);
 
-      StringBuilder classBuffer = new StringBuilder(AVERAGE_CLASS_SIZE);
+      TextBuffer classBuffer = new TextBuffer(AVERAGE_CLASS_SIZE);
       new ClassWriter().classToJava(root, classBuffer, 0);
 
       String lineSeparator = DecompilerContext.getNewLineSeparator();

src/org/jetbrains/java/decompiler/main/Fernflower.java

@@ -80,11 +80,11 @@ public class Fernflower implements IDecompiledData {
   }
 
   @Override
-  public String getClassContent(StructClass cl) {
+  public TextBuffer getClassContent(StructClass cl) {
     try {
-      StringBuilder buffer = new StringBuilder(ClassesProcessor.AVERAGE_CLASS_SIZE);
+      TextBuffer buffer = new TextBuffer(ClassesProcessor.AVERAGE_CLASS_SIZE);
       classesProcessor.writeClass(cl, buffer);
-      return buffer.toString();
+      return buffer;
     }
     catch (Throwable ex) {
       DecompilerContext.getLogger().writeMessage("Class " + cl.qualifiedName + " couldn't be fully decompiled.", ex);

src/org/jetbrains/java/decompiler/main/TextBuffer.java

@@ -0,0 +1,163 @@
+/*
+ * Copyright 2000-2014 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.jetbrains.java.decompiler.main;
+
+import java.util.*;
+
+/**
+ * Allows to connect text with resulting lines
+ *
+ * @author egor
+ */
+public class TextBuffer {
+  private final String myLineSeparator = DecompilerContext.getNewLineSeparator();
+  private final StringBuilder myStringBuilder;
+  private Map<Integer, Integer> myLineToOffsetMapping = null;
+
+  public TextBuffer() {
+    myStringBuilder = new StringBuilder();
+  }
+
+  public TextBuffer(int size) {
+    myStringBuilder = new StringBuilder(size);
+  }
+
+  public void setCurrentLine(int line) {
+    if (line >= 0) {
+      checkMapCreated();
+      myLineToOffsetMapping.put(line, myStringBuilder.length()+1);
+    }
+  }
+
+  public TextBuffer append(String str) {
+    myStringBuilder.append(str);
+    return this;
+  }
+
+  public TextBuffer append(char ch) {
+    myStringBuilder.append(ch);
+    return this;
+  }
+
+  public TextBuffer appendLineSeparator() {
+    myStringBuilder.append(myLineSeparator);
+    return this;
+  }
+
+  public void addBanner(String banner) {
+    myStringBuilder.insert(0, banner);
+    if (myLineToOffsetMapping != null) {
+      for (Integer line : myLineToOffsetMapping.keySet()) {
+        myLineToOffsetMapping.put(line, myLineToOffsetMapping.get(line) + banner.length());
+      }
+    }
+  }
+
+  @Override
+  public String toString() {
+    String original = myStringBuilder.toString();
+    if (myLineToOffsetMapping == null || myLineToOffsetMapping.isEmpty()) {
+      return original;
+    }
+    else {
+      StringBuilder res = new StringBuilder();
+      String[] srcLines = original.split(myLineSeparator);
+      int currentLineStartOffset = 0;
+      int currentLine = 0;
+      int previousMarkLine = 0;
+      int dumpedLines = 0;
+      ArrayList<Integer> linesWithMarks = new ArrayList<Integer>(myLineToOffsetMapping.keySet());
+      Collections.sort(linesWithMarks);
+      for (Integer markLine : linesWithMarks) {
+        Integer markOffset = myLineToOffsetMapping.get(markLine);
+        while (currentLine < srcLines.length) {
+          String line = srcLines[currentLine];
+          int lineEnd = currentLineStartOffset + line.length() + myLineSeparator.length();
+          if (markOffset >= currentLineStartOffset && markOffset <= lineEnd) {
+            int requiredLinesNumber = markLine - dumpedLines;
+            dumpedLines = markLine;
+            appendLines(res, srcLines, previousMarkLine, currentLine, requiredLinesNumber);
+            previousMarkLine = currentLine;
+            break;
+          }
+          currentLineStartOffset = lineEnd;
+          currentLine++;
+        }
+      }
+      if (previousMarkLine < srcLines.length) {
+        appendLines(res, srcLines, previousMarkLine, srcLines.length, srcLines.length - previousMarkLine);
+      }
+
+      return res.toString();
+    }
+  }
+
+  private void appendLines(StringBuilder res, String[] srcLines, int from, int to, int requiredLineNumber) {
+    if (to - from > requiredLineNumber) {
+      int separatorsRequired = to - from - requiredLineNumber - 1;
+      for (int i = from; i < to; i++) {
+        res.append(srcLines[i]);
+        if (separatorsRequired-- > 0) {
+          res.append(myLineSeparator);
+        }
+      }
+      res.append(myLineSeparator);
+    }
+    else if (to - from <= requiredLineNumber) {
+      for (int i = from; i < to; i++) {
+        res.append(srcLines[i]).append(myLineSeparator);
+      }
+      for (int i = 0; i < requiredLineNumber - to + from; i++) {
+        res.append(myLineSeparator);
+      }
+    }
+  }
+
+  public int length() {
+    return myStringBuilder.length();
+  }
+
+  public String substring(int start) {
+    return myStringBuilder.substring(start);
+  }
+
+  public void setLength(int position) {
+    myStringBuilder.setLength(position);
+  }
+
+  public void append(TextBuffer buffer) {
+    if (buffer.myLineToOffsetMapping != null && !buffer.myLineToOffsetMapping.isEmpty()) {
+      checkMapCreated();
+      for (Map.Entry<Integer, Integer> entry : buffer.myLineToOffsetMapping.entrySet()) {
+        myLineToOffsetMapping.put(entry.getKey(), entry.getValue() + myStringBuilder.length());
+      }
+    }
+    myStringBuilder.append(buffer.myStringBuilder);
+  }
+
+  private void checkMapCreated() {
+    if (myLineToOffsetMapping == null) {
+      myLineToOffsetMapping = new HashMap<Integer, Integer>();
+    }
+  }
+
+  public void insert(int offset, String s) {
+    if (myLineToOffsetMapping != null) {
+      throw new IllegalStateException("insert not yet supported with Line mapping");
+    }
+    myStringBuilder.insert(offset, s);
+  }
+}

src/org/jetbrains/java/decompiler/main/collectors/BytecodeSourceMapper.java

@@ -4,6 +4,7 @@ import java.util.HashMap;
 import java.util.Map.Entry;
 
 import org.jetbrains.java.decompiler.main.DecompilerContext;
+import org.jetbrains.java.decompiler.main.TextBuffer;
 import org.jetbrains.java.decompiler.util.InterpreterUtil;
 
 public class BytecodeSourceMapper {
@@ -37,7 +38,7 @@ public class BytecodeSourceMapper {
     }
   }
 
-  public void dumpMapping(StringBuilder buffer) {
+  public void dumpMapping(TextBuffer buffer) {
 
     String lineSeparator = DecompilerContext.getNewLineSeparator();
     String indentstr1 = InterpreterUtil.getIndentString(1);

src/org/jetbrains/java/decompiler/main/collectors/ImportCollector.java

@@ -18,6 +18,7 @@ package org.jetbrains.java.decompiler.main.collectors;
 import org.jetbrains.java.decompiler.main.ClassesProcessor;
 import org.jetbrains.java.decompiler.main.ClassesProcessor.ClassNode;
 import org.jetbrains.java.decompiler.main.DecompilerContext;
+import org.jetbrains.java.decompiler.main.TextBuffer;
 import org.jetbrains.java.decompiler.struct.StructContext;
 
 import java.util.*;
@@ -107,7 +108,7 @@ public class ImportCollector {
     return retname == null ? nshort : retname;
   }
 
-  public int writeImports(StringBuilder buffer) {
+  public int writeImports(TextBuffer buffer) {
 
     int importlines_written = 0;
     String new_line_separator = DecompilerContext.getNewLineSeparator();

src/org/jetbrains/java/decompiler/main/decompiler/ConsoleDecompiler.java

@@ -17,6 +17,7 @@ package org.jetbrains.java.decompiler.main.decompiler;
 
 import org.jetbrains.java.decompiler.main.DecompilerContext;
 import org.jetbrains.java.decompiler.main.Fernflower;
+import org.jetbrains.java.decompiler.main.TextBuffer;
 import org.jetbrains.java.decompiler.main.extern.IBytecodeProvider;
 import org.jetbrains.java.decompiler.main.extern.IFernflowerLogger;
 import org.jetbrains.java.decompiler.main.extern.IResultSaver;
@@ -181,12 +182,12 @@ public class ConsoleDecompiler implements IBytecodeProvider, IResultSaver {
   }
 
   @Override
-  public void saveClassFile(String path, String qualifiedName, String entryName, String content) {
+  public void saveClassFile(String path, String qualifiedName, String entryName, TextBuffer content) {
     File file = new File(getAbsolutePath(path), entryName);
     try {
       Writer out = new OutputStreamWriter(new FileOutputStream(file), "UTF8");
       try {
-        out.write(content);
+        out.write(content.toString());
       }
       finally {
         out.close();

src/org/jetbrains/java/decompiler/main/extern/IFernflowerPreferences.java

@@ -45,6 +45,7 @@ public interface IFernflowerPreferences {
   String LAMBDA_TO_ANONYMOUS_CLASS = "lac";
 
   String BYTECODE_SOURCE_MAPPING = "bsm";
+  String USE_DEBUG_LINE_NUMBERS = "udl";
 
   String LOG_LEVEL = "log";
   String MAX_PROCESSING_METHOD = "mpm";
@@ -80,6 +81,7 @@ public interface IFernflowerPreferences {
     put(LAMBDA_TO_ANONYMOUS_CLASS, "0");
 
     put(BYTECODE_SOURCE_MAPPING, "0");
+    put(USE_DEBUG_LINE_NUMBERS, "0");
 
     put(LOG_LEVEL, IFernflowerLogger.Severity.INFO.name());
     put(MAX_PROCESSING_METHOD, "0");

src/org/jetbrains/java/decompiler/main/extern/IResultSaver.java

@@ -15,6 +15,8 @@
  */
 package org.jetbrains.java.decompiler.main.extern;
 
+import org.jetbrains.java.decompiler.main.TextBuffer;
+
 import java.util.jar.Manifest;
 
 public interface IResultSaver {
@@ -22,7 +24,7 @@ public interface IResultSaver {
 
   void copyFile(String source, String path, String entryName);
 
-  void saveClassFile(String path, String qualifiedName, String entryName, String content);
+  void saveClassFile(String path, String qualifiedName, String entryName, TextBuffer content);
 
   void createArchive(String path, String archiveName, Manifest manifest);
 

src/org/jetbrains/java/decompiler/modules/decompiler/ExprProcessor.java

@@ -20,6 +20,7 @@ import org.jetbrains.java.decompiler.code.Instruction;
 import org.jetbrains.java.decompiler.code.InstructionSequence;
 import org.jetbrains.java.decompiler.code.cfg.BasicBlock;
 import org.jetbrains.java.decompiler.main.DecompilerContext;
+import org.jetbrains.java.decompiler.main.TextBuffer;
 import org.jetbrains.java.decompiler.main.collectors.BytecodeMappingTracer;
 import org.jetbrains.java.decompiler.modules.decompiler.exps.*;
 import org.jetbrains.java.decompiler.modules.decompiler.sforms.DirectGraph;
@@ -857,14 +858,14 @@ public class ExprProcessor implements CodeConstants {
     return defaultval;
   }
 
-  public static boolean getCastedExprent(Exprent exprent, VarType leftType, StringBuilder buffer, int indent,
+  public static boolean getCastedExprent(Exprent exprent, VarType leftType, TextBuffer buffer, int indent,
                                                                boolean castNull, BytecodeMappingTracer tracer) {
     return getCastedExprent(exprent, leftType, buffer, indent, castNull, false, tracer);
   }
 
   public static boolean getCastedExprent(Exprent exprent,
                                          VarType leftType,
-                                         StringBuilder buffer,
+                                         TextBuffer buffer,
                                          int indent,
                                          boolean castNull,
                                          boolean castAlways, BytecodeMappingTracer tracer) {

src/org/jetbrains/java/decompiler/modules/decompiler/exps/ExitExprent.java

@@ -18,6 +18,7 @@ package org.jetbrains.java.decompiler.modules.decompiler.exps;
 import org.jetbrains.java.decompiler.code.CodeConstants;
 import org.jetbrains.java.decompiler.main.ClassesProcessor.ClassNode;
 import org.jetbrains.java.decompiler.main.DecompilerContext;
+import org.jetbrains.java.decompiler.main.TextBuffer;
 import org.jetbrains.java.decompiler.main.collectors.BytecodeMappingTracer;
 import org.jetbrains.java.decompiler.main.rels.MethodWrapper;
 import org.jetbrains.java.decompiler.modules.decompiler.ExprProcessor;
@@ -81,7 +82,7 @@ public class ExitExprent extends Exprent {
     tracer.addMapping(bytecode);
 
     if (exittype == EXIT_RETURN) {
-      StringBuilder buffer = new StringBuilder();
+      TextBuffer buffer = new TextBuffer();
 
       if (rettype.type != CodeConstants.TYPE_VOID) {
         buffer.append(" ");
@@ -115,7 +116,7 @@ public class ExitExprent extends Exprent {
           if (classname != null) {
             VarType exctype = new VarType(classname, true);
 
-            StringBuilder buffer = new StringBuilder();
+            TextBuffer buffer = new TextBuffer();
             ExprProcessor.getCastedExprent(value, exctype, buffer, indent, false, tracer);
 
             return "throw " + buffer.toString();

src/org/jetbrains/java/decompiler/modules/decompiler/exps/FieldExprent.java

@@ -18,6 +18,7 @@ package org.jetbrains.java.decompiler.modules.decompiler.exps;
 import org.jetbrains.java.decompiler.code.CodeConstants;
 import org.jetbrains.java.decompiler.main.ClassesProcessor.ClassNode;
 import org.jetbrains.java.decompiler.main.DecompilerContext;
+import org.jetbrains.java.decompiler.main.TextBuffer;
 import org.jetbrains.java.decompiler.main.collectors.BytecodeMappingTracer;
 import org.jetbrains.java.decompiler.main.rels.MethodWrapper;
 import org.jetbrains.java.decompiler.modules.decompiler.ExprProcessor;
@@ -137,7 +138,7 @@ public class FieldExprent extends Exprent {
         buf.append("super");
       }
       else {
-        StringBuilder buff = new StringBuilder();
+        TextBuffer buff = new TextBuffer();
         boolean casted = ExprProcessor.getCastedExprent(instance, new VarType(CodeConstants.TYPE_OBJECT, 0, classname), buff, indent, true, tracer);
         String res = buff.toString();
 

src/org/jetbrains/java/decompiler/modules/decompiler/exps/InvocationExprent.java

@@ -18,6 +18,7 @@ package org.jetbrains.java.decompiler.modules.decompiler.exps;
 import org.jetbrains.java.decompiler.code.CodeConstants;
 import org.jetbrains.java.decompiler.main.ClassesProcessor.ClassNode;
 import org.jetbrains.java.decompiler.main.DecompilerContext;
+import org.jetbrains.java.decompiler.main.TextBuffer;
 import org.jetbrains.java.decompiler.main.collectors.BytecodeMappingTracer;
 import org.jetbrains.java.decompiler.main.extern.IFernflowerPreferences;
 import org.jetbrains.java.decompiler.main.rels.MethodWrapper;
@@ -360,7 +361,7 @@ public class InvocationExprent extends Exprent {
           buf.append(", ");
         }
 
-        StringBuilder buff = new StringBuilder();
+        TextBuffer buff = new TextBuffer();
         ExprProcessor.getCastedExprent(lstParameters.get(i), descriptor.params[i], buff, indent, true, setAmbiguousParameters.contains(i), tracer);
 
         buf.append(buff);

src/org/jetbrains/java/decompiler/modules/decompiler/exps/NewExprent.java

@@ -19,6 +19,7 @@ import org.jetbrains.java.decompiler.code.CodeConstants;
 import org.jetbrains.java.decompiler.main.ClassWriter;
 import org.jetbrains.java.decompiler.main.ClassesProcessor.ClassNode;
 import org.jetbrains.java.decompiler.main.DecompilerContext;
+import org.jetbrains.java.decompiler.main.TextBuffer;
 import org.jetbrains.java.decompiler.main.collectors.BytecodeMappingTracer;
 import org.jetbrains.java.decompiler.main.extern.IFernflowerPreferences;
 import org.jetbrains.java.decompiler.modules.decompiler.ExprProcessor;
@@ -172,7 +173,7 @@ public class NewExprent extends Exprent {
 
   @Override
   public String toJava(int indent, BytecodeMappingTracer tracer) {
-    StringBuilder buf = new StringBuilder();
+    TextBuffer buf = new TextBuffer();
 
     if (anonymous) {
 
@@ -220,7 +221,7 @@ public class NewExprent extends Exprent {
               }
             }
 
-            StringBuilder buff = new StringBuilder();
+            TextBuffer buff = new TextBuffer();
             ExprProcessor.getCastedExprent(param, invsuper.getDescriptor().params[i], buff, indent, true, tracer);
 
             buf.append(buff);
@@ -317,7 +318,7 @@ public class NewExprent extends Exprent {
                   buf.append(", ");
                 }
 
-                StringBuilder buff = new StringBuilder();
+                TextBuffer buff = new TextBuffer();
                 ExprProcessor.getCastedExprent(lstParameters.get(i), constructor.getDescriptor().params[i], buff, indent, true, tracer);
 
                 buf.append(buff);
@@ -373,7 +374,7 @@ public class NewExprent extends Exprent {
             if (i > 0) {
               buf.append(", ");
             }
-            StringBuilder buff = new StringBuilder();
+            TextBuffer buff = new TextBuffer();
             ExprProcessor.getCastedExprent(lstArrayElements.get(i), leftType, buff, indent, false, tracer);
 
             buf.append(buff);

src/org/jetbrains/java/decompiler/modules/decompiler/exps/VarExprent.java

@@ -18,6 +18,7 @@ package org.jetbrains.java.decompiler.modules.decompiler.exps;
 import org.jetbrains.java.decompiler.code.CodeConstants;
 import org.jetbrains.java.decompiler.main.ClassWriter;
 import org.jetbrains.java.decompiler.main.ClassesProcessor.ClassNode;
+import org.jetbrains.java.decompiler.main.TextBuffer;
 import org.jetbrains.java.decompiler.main.collectors.BytecodeMappingTracer;
 import org.jetbrains.java.decompiler.main.DecompilerContext;
 import org.jetbrains.java.decompiler.modules.decompiler.ExprProcessor;
@@ -83,7 +84,7 @@ public class VarExprent extends Exprent {
 
   @Override
   public String toJava(int indent, BytecodeMappingTracer tracer) {
-    StringBuilder buffer = new StringBuilder();
+    TextBuffer buffer = new TextBuffer();
 
     tracer.addMapping(bytecode);
 

src/org/jetbrains/java/decompiler/struct/ContextUnit.java

@@ -15,6 +15,7 @@
  */
 package org.jetbrains.java.decompiler.struct;
 
+import org.jetbrains.java.decompiler.main.TextBuffer;
 import org.jetbrains.java.decompiler.main.extern.IResultSaver;
 import org.jetbrains.java.decompiler.struct.lazy.LazyLoader;
 import org.jetbrains.java.decompiler.struct.lazy.LazyLoader.Link;
@@ -110,7 +111,7 @@ public class ContextUnit {
           StructClass cl = classes.get(i);
           String entryName = decompiledData.getClassEntryName(cl, classEntries.get(i));
           if (entryName != null) {
-            String content = decompiledData.getClassContent(cl);
+            TextBuffer content = decompiledData.getClassContent(cl);
             if (content != null) {
               resultSaver.saveClassFile(filename, cl.qualifiedName, entryName, content);
             }
@@ -142,8 +143,8 @@ public class ContextUnit {
           StructClass cl = classes.get(i);
           String entryName = decompiledData.getClassEntryName(cl, classEntries.get(i));
           if (entryName != null) {
-            String content = decompiledData.getClassContent(cl);
-            resultSaver.saveClassEntry(archivePath, filename, cl.qualifiedName, entryName, content);
+            TextBuffer content = decompiledData.getClassContent(cl);
+            resultSaver.saveClassEntry(archivePath, filename, cl.qualifiedName, entryName, content.toString());
           }
         }
 

src/org/jetbrains/java/decompiler/struct/IDecompiledData.java

@@ -15,9 +15,11 @@
  */
 package org.jetbrains.java.decompiler.struct;
 
+import org.jetbrains.java.decompiler.main.TextBuffer;
+
 public interface IDecompiledData {
 
   String getClassEntryName(StructClass cl, String entryname);
 
-  String getClassContent(StructClass cl);
+  TextBuffer getClassContent(StructClass cl);
 }

src/org/jetbrains/java/decompiler/util/InterpreterUtil.java

@@ -16,6 +16,7 @@
 package org.jetbrains.java.decompiler.util;
 
 import org.jetbrains.java.decompiler.main.DecompilerContext;
+import org.jetbrains.java.decompiler.main.TextBuffer;
 import org.jetbrains.java.decompiler.main.extern.IFernflowerPreferences;
 
 import java.io.*;
@@ -91,12 +92,12 @@ public class InterpreterUtil {
 
   public static String getIndentString(int length) {
     if (length == 0) return "";
-    StringBuilder buf = new StringBuilder();
+    TextBuffer buf = new TextBuffer();
     appendIndent(buf, length);
     return buf.toString();
   }
 
-  public static void appendIndent(StringBuilder buffer, int length) {
+  public static void appendIndent(TextBuffer buffer, int length) {
     if (length == 0) return;
     String indent = (String)DecompilerContext.getProperty(IFernflowerPreferences.INDENT_STRING);
     while (length-- > 0) {