decompiler: minor optimization - less calculateLines calls

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

@@ -161,7 +161,7 @@ public class ClassWriter {
     ClassNode outerNode = (ClassNode)DecompilerContext.getProperty(DecompilerContext.CURRENT_CLASS_NODE);
     DecompilerContext.setProperty(DecompilerContext.CURRENT_CLASS_NODE, node);
 
-    final int startLine = tracer != null ? tracer.getCurrentSourceLine() : 0;
+    int startLine = tracer != null ? tracer.getCurrentSourceLine() : 0;
     BytecodeMappingTracer dummy_tracer = new BytecodeMappingTracer();
 
     try {
@@ -216,7 +216,7 @@ public class ClassWriter {
       }
 
       // FIXME: fields don't matter at the moment
-      //startLine = buffer.countLines(start_class_def);
+      startLine += buffer.countLines(start_class_def);
 
       // methods
       for (StructMethod mt : cl.getMethods()) {
@@ -228,14 +228,15 @@ public class ClassWriter {
         int position = buffer.length();
         if (hasContent) {
           buffer.appendLineSeparator();
+          startLine++;
         }
-        BytecodeMappingTracer method_tracer = new BytecodeMappingTracer(buffer.countLines() + startLine);
+        BytecodeMappingTracer method_tracer = new BytecodeMappingTracer(startLine);
         boolean methodSkipped = !methodToJava(node, mt, buffer, indent + 1, method_tracer);
         if (!methodSkipped) {
           hasContent = true;
           DecompilerContext.getBytecodeSourceMapper().addTracer(cl.qualifiedName,
                                   InterpreterUtil.makeUniqueKey(mt.getName(), mt.getDescriptor()), method_tracer);
-          //startLine = (method_tracer.getCurrentSourceLine() + 1); // zero-based line index
+          startLine = method_tracer.getCurrentSourceLine()+1; // zero-based line index
         }
         else {
           buffer.setLength(position);