http://xmlgraphics.apache.org/fop/: Apache FOP (Formatting Objects Processor) is the world's first print formatter driven by XSL formatting objects (XSL-FO) and the world's first output independent formatter. It is a Java application that reads a formatting object (FO) tree and renders the resulting pages to a specified output. Output formats currently supported include PDF, PCL, PS, AFP, TIFF, PNG, SVG, XML (area tree representation), Print, AWT and TXT. The primary output target is PDF. (Apache Software Foundation) 
public final class org.apache.fop.layoutmgr.AreaAdditionUtil
  minor version: 0
  major version: 59
  flags: flags: (0x0031) ACC_PUBLIC, ACC_FINAL, ACC_SUPER
  this_class: org.apache.fop.layoutmgr.AreaAdditionUtil
  super_class: java.lang.Object
{
  private void <init>();
    descriptor: ()V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.apache.fop.layoutmgr.AreaAdditionUtil this
         0: .line 31
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 32
            return
        end local 0 // org.apache.fop.layoutmgr.AreaAdditionUtil this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lorg/apache/fop/layoutmgr/AreaAdditionUtil;

  public static void addAreas(org.apache.fop.layoutmgr.AbstractLayoutManager, org.apache.fop.layoutmgr.PositionIterator, org.apache.fop.layoutmgr.LayoutContext);
    descriptor: (Lorg/apache/fop/layoutmgr/AbstractLayoutManager;Lorg/apache/fop/layoutmgr/PositionIterator;Lorg/apache/fop/layoutmgr/LayoutContext;)V
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=5, locals=12, args_size=3
        start local 0 // org.apache.fop.layoutmgr.AbstractLayoutManager parentLM
        start local 1 // org.apache.fop.layoutmgr.PositionIterator parentIter
        start local 2 // org.apache.fop.layoutmgr.LayoutContext layoutContext
         0: .line 43
            aload 2 /* layoutContext */
            invokestatic org.apache.fop.layoutmgr.LayoutContext.offspringOf:(Lorg/apache/fop/layoutmgr/LayoutContext;)Lorg/apache/fop/layoutmgr/LayoutContext;
            astore 4 /* lc */
        start local 4 // org.apache.fop.layoutmgr.LayoutContext lc
         1: .line 44
            aconst_null
            astore 5 /* firstLM */
        start local 5 // org.apache.fop.layoutmgr.LayoutManager firstLM
         2: .line 45
            aconst_null
            astore 6 /* lastLM */
        start local 6 // org.apache.fop.layoutmgr.LayoutManager lastLM
         3: .line 46
            aconst_null
            astore 7 /* firstPos */
        start local 7 // org.apache.fop.layoutmgr.Position firstPos
         4: .line 47
            aconst_null
            astore 8 /* lastPos */
        start local 8 // org.apache.fop.layoutmgr.Position lastPos
         5: .line 49
            aload 0 /* parentLM */
            ifnull 7
         6: .line 50
            aload 0 /* parentLM */
            invokevirtual org.apache.fop.layoutmgr.AbstractLayoutManager.addId:()V
         7: .line 55
      StackMap locals: org.apache.fop.layoutmgr.AbstractLayoutManager org.apache.fop.layoutmgr.PositionIterator org.apache.fop.layoutmgr.LayoutContext top org.apache.fop.layoutmgr.LayoutContext org.apache.fop.layoutmgr.LayoutManager org.apache.fop.layoutmgr.LayoutManager org.apache.fop.layoutmgr.Position org.apache.fop.layoutmgr.Position
      StackMap stack:
            new java.util.LinkedList
            dup
            invokespecial java.util.LinkedList.<init>:()V
            astore 9 /* positionList */
        start local 9 // java.util.LinkedList positionList
         8: .line 57
            goto 24
         9: .line 58
      StackMap locals: java.util.LinkedList
      StackMap stack:
            aload 1 /* parentIter */
            invokevirtual org.apache.fop.layoutmgr.PositionIterator.next:()Lorg/apache/fop/layoutmgr/Position;
            astore 10 /* pos */
        start local 10 // org.apache.fop.layoutmgr.Position pos
        10: .line 59
            aload 10 /* pos */
            ifnonnull 12
        11: .line 60
            goto 24
        12: .line 62
      StackMap locals: org.apache.fop.layoutmgr.Position
      StackMap stack:
            aload 10 /* pos */
            invokevirtual org.apache.fop.layoutmgr.Position.getIndex:()I
            iflt 16
        13: .line 63
            aload 7 /* firstPos */
            ifnonnull 15
        14: .line 64
            aload 10 /* pos */
            astore 7 /* firstPos */
        15: .line 66
      StackMap locals:
      StackMap stack:
            aload 10 /* pos */
            astore 8 /* lastPos */
        16: .line 68
      StackMap locals:
      StackMap stack:
            aload 10 /* pos */
            instanceof org.apache.fop.layoutmgr.NonLeafPosition
            ifeq 22
        17: .line 70
            aload 9 /* positionList */
            aload 10 /* pos */
            invokevirtual org.apache.fop.layoutmgr.Position.getPosition:()Lorg/apache/fop/layoutmgr/Position;
            invokevirtual java.util.LinkedList.add:(Ljava/lang/Object;)Z
            pop
        18: .line 71
            aload 10 /* pos */
            invokevirtual org.apache.fop.layoutmgr.Position.getPosition:()Lorg/apache/fop/layoutmgr/Position;
            invokevirtual org.apache.fop.layoutmgr.Position.getLM:()Lorg/apache/fop/layoutmgr/LayoutManager;
            astore 6 /* lastLM */
        19: .line 72
            aload 5 /* firstLM */
            ifnonnull 24
        20: .line 73
            aload 6 /* lastLM */
            astore 5 /* firstLM */
        21: .line 75
            goto 24
      StackMap locals:
      StackMap stack:
        22: aload 10 /* pos */
            instanceof org.apache.fop.layoutmgr.SpaceResolver$SpaceHandlingBreakPosition
            ifeq 24
        23: .line 76
            aload 9 /* positionList */
            aload 10 /* pos */
            invokevirtual java.util.LinkedList.add:(Ljava/lang/Object;)Z
            pop
        end local 10 // org.apache.fop.layoutmgr.Position pos
        24: .line 57
      StackMap locals:
      StackMap stack:
            aload 1 /* parentIter */
            invokevirtual org.apache.fop.layoutmgr.PositionIterator.hasNext:()Z
            ifne 9
        25: .line 81
            aload 7 /* firstPos */
            ifnonnull 27
        26: .line 82
            return
        27: .line 89
      StackMap locals:
      StackMap stack:
            aload 0 /* parentLM */
            ifnull 33
        28: .line 90
            aload 0 /* parentLM */
        29: .line 91
            iconst_1
        30: .line 92
            aload 0 /* parentLM */
            aload 7 /* firstPos */
            invokevirtual org.apache.fop.layoutmgr.AbstractLayoutManager.isFirst:(Lorg/apache/fop/layoutmgr/Position;)Z
        31: .line 93
            aload 0 /* parentLM */
            aload 8 /* lastPos */
            invokevirtual org.apache.fop.layoutmgr.AbstractLayoutManager.isLast:(Lorg/apache/fop/layoutmgr/Position;)Z
        32: .line 90
            invokevirtual org.apache.fop.layoutmgr.AbstractLayoutManager.registerMarkers:(ZZZ)V
        33: .line 96
      StackMap locals:
      StackMap stack:
            new org.apache.fop.layoutmgr.PositionIterator
            dup
            aload 9 /* positionList */
            invokevirtual java.util.LinkedList.listIterator:()Ljava/util/ListIterator;
            invokespecial org.apache.fop.layoutmgr.PositionIterator.<init>:(Ljava/util/Iterator;)V
            astore 11 /* childPosIter */
        start local 11 // org.apache.fop.layoutmgr.PositionIterator childPosIter
        34: .line 98
            goto 48
        start local 3 // org.apache.fop.layoutmgr.LayoutManager childLM
        35: .line 102
      StackMap locals: org.apache.fop.layoutmgr.AbstractLayoutManager org.apache.fop.layoutmgr.PositionIterator org.apache.fop.layoutmgr.LayoutContext org.apache.fop.layoutmgr.LayoutManager org.apache.fop.layoutmgr.LayoutContext org.apache.fop.layoutmgr.LayoutManager org.apache.fop.layoutmgr.LayoutManager org.apache.fop.layoutmgr.Position org.apache.fop.layoutmgr.Position java.util.LinkedList top org.apache.fop.layoutmgr.PositionIterator
      StackMap stack:
            aload 4 /* lc */
            iconst_4
            aload 3 /* childLM */
            aload 5 /* firstLM */
            if_acmpne 36
            iconst_1
            goto 37
      StackMap locals: org.apache.fop.layoutmgr.AbstractLayoutManager org.apache.fop.layoutmgr.PositionIterator org.apache.fop.layoutmgr.LayoutContext org.apache.fop.layoutmgr.LayoutManager org.apache.fop.layoutmgr.LayoutContext org.apache.fop.layoutmgr.LayoutManager org.apache.fop.layoutmgr.LayoutManager org.apache.fop.layoutmgr.Position org.apache.fop.layoutmgr.Position java.util.LinkedList top org.apache.fop.layoutmgr.PositionIterator
      StackMap stack: org.apache.fop.layoutmgr.LayoutContext int
        36: iconst_0
      StackMap locals: org.apache.fop.layoutmgr.AbstractLayoutManager org.apache.fop.layoutmgr.PositionIterator org.apache.fop.layoutmgr.LayoutContext org.apache.fop.layoutmgr.LayoutManager org.apache.fop.layoutmgr.LayoutContext org.apache.fop.layoutmgr.LayoutManager org.apache.fop.layoutmgr.LayoutManager org.apache.fop.layoutmgr.Position org.apache.fop.layoutmgr.Position java.util.LinkedList top org.apache.fop.layoutmgr.PositionIterator
      StackMap stack: org.apache.fop.layoutmgr.LayoutContext int int
        37: invokevirtual org.apache.fop.layoutmgr.LayoutContext.setFlags:(IZ)V
        38: .line 103
            aload 4 /* lc */
            bipush 8
            aload 3 /* childLM */
            aload 6 /* lastLM */
            if_acmpne 39
            iconst_1
            goto 40
      StackMap locals: org.apache.fop.layoutmgr.AbstractLayoutManager org.apache.fop.layoutmgr.PositionIterator org.apache.fop.layoutmgr.LayoutContext org.apache.fop.layoutmgr.LayoutManager org.apache.fop.layoutmgr.LayoutContext org.apache.fop.layoutmgr.LayoutManager org.apache.fop.layoutmgr.LayoutManager org.apache.fop.layoutmgr.Position org.apache.fop.layoutmgr.Position java.util.LinkedList top org.apache.fop.layoutmgr.PositionIterator
      StackMap stack: org.apache.fop.layoutmgr.LayoutContext int
        39: iconst_0
      StackMap locals: org.apache.fop.layoutmgr.AbstractLayoutManager org.apache.fop.layoutmgr.PositionIterator org.apache.fop.layoutmgr.LayoutContext org.apache.fop.layoutmgr.LayoutManager org.apache.fop.layoutmgr.LayoutContext org.apache.fop.layoutmgr.LayoutManager org.apache.fop.layoutmgr.LayoutManager org.apache.fop.layoutmgr.Position org.apache.fop.layoutmgr.Position java.util.LinkedList top org.apache.fop.layoutmgr.PositionIterator
      StackMap stack: org.apache.fop.layoutmgr.LayoutContext int int
        40: invokevirtual org.apache.fop.layoutmgr.LayoutContext.setFlags:(IZ)V
        41: .line 105
            aload 4 /* lc */
            aload 2 /* layoutContext */
            invokevirtual org.apache.fop.layoutmgr.LayoutContext.getSpaceAdjust:()D
            invokevirtual org.apache.fop.layoutmgr.LayoutContext.setSpaceAdjust:(D)V
        42: .line 108
            aload 4 /* lc */
            aload 3 /* childLM */
            aload 5 /* firstLM */
            if_acmpne 43
            aload 2 /* layoutContext */
            invokevirtual org.apache.fop.layoutmgr.LayoutContext.getSpaceBefore:()I
            goto 44
      StackMap locals:
      StackMap stack: org.apache.fop.layoutmgr.LayoutContext
        43: iconst_0
      StackMap locals: org.apache.fop.layoutmgr.AbstractLayoutManager org.apache.fop.layoutmgr.PositionIterator org.apache.fop.layoutmgr.LayoutContext org.apache.fop.layoutmgr.LayoutManager org.apache.fop.layoutmgr.LayoutContext org.apache.fop.layoutmgr.LayoutManager org.apache.fop.layoutmgr.LayoutManager org.apache.fop.layoutmgr.Position org.apache.fop.layoutmgr.Position java.util.LinkedList top org.apache.fop.layoutmgr.PositionIterator
      StackMap stack: org.apache.fop.layoutmgr.LayoutContext int
        44: invokevirtual org.apache.fop.layoutmgr.LayoutContext.setSpaceBefore:(I)V
        45: .line 111
            aload 4 /* lc */
            aload 2 /* layoutContext */
            invokevirtual org.apache.fop.layoutmgr.LayoutContext.getSpaceAfter:()I
            invokevirtual org.apache.fop.layoutmgr.LayoutContext.setSpaceAfter:(I)V
        46: .line 112
            aload 4 /* lc */
            aload 2 /* layoutContext */
            invokevirtual org.apache.fop.layoutmgr.LayoutContext.getStackLimitBP:()Lorg/apache/fop/traits/MinOptMax;
            invokevirtual org.apache.fop.layoutmgr.LayoutContext.setStackLimitBP:(Lorg/apache/fop/traits/MinOptMax;)V
        47: .line 113
            aload 3 /* childLM */
            aload 11 /* childPosIter */
            aload 4 /* lc */
            invokeinterface org.apache.fop.layoutmgr.LayoutManager.addAreas:(Lorg/apache/fop/layoutmgr/PositionIterator;Lorg/apache/fop/layoutmgr/LayoutContext;)V
        end local 3 // org.apache.fop.layoutmgr.LayoutManager childLM
        48: .line 98
      StackMap locals: org.apache.fop.layoutmgr.AbstractLayoutManager org.apache.fop.layoutmgr.PositionIterator org.apache.fop.layoutmgr.LayoutContext top org.apache.fop.layoutmgr.LayoutContext org.apache.fop.layoutmgr.LayoutManager org.apache.fop.layoutmgr.LayoutManager org.apache.fop.layoutmgr.Position org.apache.fop.layoutmgr.Position java.util.LinkedList top org.apache.fop.layoutmgr.PositionIterator
      StackMap stack:
            aload 11 /* childPosIter */
            invokevirtual org.apache.fop.layoutmgr.PositionIterator.getNextChildLM:()Lorg/apache/fop/layoutmgr/LayoutManager;
            dup
            astore 3 /* childLM */
        start local 3 // org.apache.fop.layoutmgr.LayoutManager childLM
        49: ifnonnull 35
        50: .line 116
            aload 0 /* parentLM */
            ifnull 56
        51: .line 117
            aload 0 /* parentLM */
        52: .line 118
            iconst_0
        53: .line 119
            aload 0 /* parentLM */
            aload 7 /* firstPos */
            invokevirtual org.apache.fop.layoutmgr.AbstractLayoutManager.isFirst:(Lorg/apache/fop/layoutmgr/Position;)Z
        54: .line 120
            aload 0 /* parentLM */
            aload 8 /* lastPos */
            invokevirtual org.apache.fop.layoutmgr.AbstractLayoutManager.isLast:(Lorg/apache/fop/layoutmgr/Position;)Z
        55: .line 117
            invokevirtual org.apache.fop.layoutmgr.AbstractLayoutManager.registerMarkers:(ZZZ)V
        56: .line 124
      StackMap locals: org.apache.fop.layoutmgr.AbstractLayoutManager org.apache.fop.layoutmgr.PositionIterator org.apache.fop.layoutmgr.LayoutContext org.apache.fop.layoutmgr.LayoutManager org.apache.fop.layoutmgr.LayoutContext org.apache.fop.layoutmgr.LayoutManager org.apache.fop.layoutmgr.LayoutManager org.apache.fop.layoutmgr.Position org.apache.fop.layoutmgr.Position java.util.LinkedList top org.apache.fop.layoutmgr.PositionIterator
      StackMap stack:
            return
        end local 11 // org.apache.fop.layoutmgr.PositionIterator childPosIter
        end local 9 // java.util.LinkedList positionList
        end local 8 // org.apache.fop.layoutmgr.Position lastPos
        end local 7 // org.apache.fop.layoutmgr.Position firstPos
        end local 6 // org.apache.fop.layoutmgr.LayoutManager lastLM
        end local 5 // org.apache.fop.layoutmgr.LayoutManager firstLM
        end local 4 // org.apache.fop.layoutmgr.LayoutContext lc
        end local 3 // org.apache.fop.layoutmgr.LayoutManager childLM
        end local 2 // org.apache.fop.layoutmgr.LayoutContext layoutContext
        end local 1 // org.apache.fop.layoutmgr.PositionIterator parentIter
        end local 0 // org.apache.fop.layoutmgr.AbstractLayoutManager parentLM
      LocalVariableTable:
        Start  End  Slot           Name  Signature
            0   57     0       parentLM  Lorg/apache/fop/layoutmgr/AbstractLayoutManager;
            0   57     1     parentIter  Lorg/apache/fop/layoutmgr/PositionIterator;
            0   57     2  layoutContext  Lorg/apache/fop/layoutmgr/LayoutContext;
           35   48     3        childLM  Lorg/apache/fop/layoutmgr/LayoutManager;
           49   57     3        childLM  Lorg/apache/fop/layoutmgr/LayoutManager;
            1   57     4             lc  Lorg/apache/fop/layoutmgr/LayoutContext;
            2   57     5        firstLM  Lorg/apache/fop/layoutmgr/LayoutManager;
            3   57     6         lastLM  Lorg/apache/fop/layoutmgr/LayoutManager;
            4   57     7       firstPos  Lorg/apache/fop/layoutmgr/Position;
            5   57     8        lastPos  Lorg/apache/fop/layoutmgr/Position;
            8   57     9   positionList  Ljava/util/LinkedList<Lorg/apache/fop/layoutmgr/Position;>;
           10   24    10            pos  Lorg/apache/fop/layoutmgr/Position;
           34   57    11   childPosIter  Lorg/apache/fop/layoutmgr/PositionIterator;
    MethodParameters:
               Name  Flags
      parentLM       
      parentIter     
      layoutContext  
}
SourceFile: "AreaAdditionUtil.java"
InnerClasses:
  public SpaceHandlingBreakPosition = org.apache.fop.layoutmgr.SpaceResolver$SpaceHandlingBreakPosition of org.apache.fop.layoutmgr.SpaceResolver