decompiler: line mapping for break and continue

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

@@ -768,6 +768,16 @@ public class ExprProcessor implements CodeConstants {
                .isClassDef()));
   }
 
+  private static void addDeletedGotoInstructionMapping(Statement stat, BytecodeMappingTracer tracer) {
+    if (stat instanceof BasicBlockStatement) {
+      BasicBlock block = ((BasicBlockStatement)stat).getBlock();
+      List<Integer> offsets = block.getInstrOldOffsets();
+      if (!offsets.isEmpty() && offsets.size() > block.getSeq().length()) { // some instructions have been deleted, but we still have offsets
+        tracer.addMapping(offsets.get(offsets.size() - 1)); // add the last offset
+      }
+    }
+  }
+
   public static TextBuffer jmpWrapper(Statement stat, int indent, boolean semicolon, BytecodeMappingTracer tracer) {
     TextBuffer buf = stat.toJava(indent, tracer);
 
@@ -779,9 +789,11 @@ public class ExprProcessor implements CodeConstants {
 
         switch (edge.getType()) {
           case StatEdge.TYPE_BREAK:
+            addDeletedGotoInstructionMapping(stat, tracer);
             buf.append("break");
             break;
           case StatEdge.TYPE_CONTINUE:
+            addDeletedGotoInstructionMapping(stat, tracer);
             buf.append("continue");
         }
 

testData/results/TestClassLoop.dec

@@ -32,7 +32,7 @@ public class TestClassLoop {
             } finally {
                if(var0) {// 52
                   System.out.println("3");// 53
-                  continue;
+                  continue;// 54
                }
             }
          }
@@ -72,6 +72,7 @@ class 'pkg/TestClassLoop' {
       2a      33
       2d      33
       2f      33
+      32      34
       37      39
       3a      39
       3c      39
@@ -88,7 +89,7 @@ Lines mapping:
 49 <-> 30
 52 <-> 33
 53 <-> 34
+54 <-> 35
 58 <-> 40
 Not mapped:
 39
-54

testData/results/TestClassTypes.dec

@@ -27,10 +27,10 @@ public class TestClassTypes {
       switch(var1) {// 46
       case 88:
          System.out.println("1");// 48
-         break;
+         break;// 49
       case 656:
          System.out.println("2");// 51
-         break;
+         break;// 52
       case 65201:
       case 65489:
          System.out.println("3");// 55
@@ -87,9 +87,11 @@ class 'pkg/TestClassTypes' {
       2c      28
       2f      28
       31      28
+      34      29
       37      31
       3a      31
       3c      31
+      3f      32
       42      35
       45      35
       47      35
@@ -122,7 +124,9 @@ Lines mapping:
 41 <-> 23
 46 <-> 27
 48 <-> 29
+49 <-> 30
 51 <-> 32
+52 <-> 33
 55 <-> 36
 57 <-> 39
 61 <-> 42
@@ -130,6 +134,3 @@ Lines mapping:
 64 <-> 44
 67 <-> 47
 68 <-> 48
-Not mapped:
-49
-52