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 class org.apache.fop.area.BlockViewport extends org.apache.fop.area.Block implements org.apache.fop.area.Viewport
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: org.apache.fop.area.BlockViewport
  super_class: org.apache.fop.area.Block
{
  private static final long serialVersionUID;
    descriptor: J
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL
    ConstantValue: -7840580922580735157

  private boolean clip;
    descriptor: Z
    flags: (0x0002) ACC_PRIVATE

  private org.apache.fop.area.CTM viewportCTM;
    descriptor: Lorg/apache/fop/area/CTM;
    flags: (0x0002) ACC_PRIVATE

  public void <init>();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // org.apache.fop.area.BlockViewport this
         0: .line 42
            aload 0 /* this */
            iconst_0
            invokespecial org.apache.fop.area.BlockViewport.<init>:(Z)V
         1: .line 43
            return
        end local 0 // org.apache.fop.area.BlockViewport this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lorg/apache/fop/area/BlockViewport;

  public void <init>(boolean);
    descriptor: (Z)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // org.apache.fop.area.BlockViewport this
        start local 1 // boolean allowBPDUpdate
         0: .line 49
            aload 0 /* this */
            invokespecial org.apache.fop.area.Block.<init>:()V
         1: .line 50
            aload 0 /* this */
            iload 1 /* allowBPDUpdate */
            putfield org.apache.fop.area.BlockViewport.allowBPDUpdate:Z
         2: .line 51
            return
        end local 1 // boolean allowBPDUpdate
        end local 0 // org.apache.fop.area.BlockViewport this
      LocalVariableTable:
        Start  End  Slot            Name  Signature
            0    3     0            this  Lorg/apache/fop/area/BlockViewport;
            0    3     1  allowBPDUpdate  Z
    MethodParameters:
                Name  Flags
      allowBPDUpdate  

  public void setCTM(org.apache.fop.area.CTM);
    descriptor: (Lorg/apache/fop/area/CTM;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // org.apache.fop.area.BlockViewport this
        start local 1 // org.apache.fop.area.CTM ctm
         0: .line 61
            aload 0 /* this */
            aload 1 /* ctm */
            putfield org.apache.fop.area.BlockViewport.viewportCTM:Lorg/apache/fop/area/CTM;
         1: .line 62
            return
        end local 1 // org.apache.fop.area.CTM ctm
        end local 0 // org.apache.fop.area.BlockViewport this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lorg/apache/fop/area/BlockViewport;
            0    2     1   ctm  Lorg/apache/fop/area/CTM;
    MethodParameters:
      Name  Flags
      ctm   

  public org.apache.fop.area.CTM getCTM();
    descriptor: ()Lorg/apache/fop/area/CTM;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.apache.fop.area.BlockViewport this
         0: .line 71
            aload 0 /* this */
            getfield org.apache.fop.area.BlockViewport.viewportCTM:Lorg/apache/fop/area/CTM;
            areturn
        end local 0 // org.apache.fop.area.BlockViewport this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/apache/fop/area/BlockViewport;

  public void setClip(boolean);
    descriptor: (Z)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // org.apache.fop.area.BlockViewport this
        start local 1 // boolean cl
         0: .line 80
            aload 0 /* this */
            iload 1 /* cl */
            putfield org.apache.fop.area.BlockViewport.clip:Z
         1: .line 81
            return
        end local 1 // boolean cl
        end local 0 // org.apache.fop.area.BlockViewport this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lorg/apache/fop/area/BlockViewport;
            0    2     1    cl  Z
    MethodParameters:
      Name  Flags
      cl    

  public boolean hasClip();
    descriptor: ()Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.apache.fop.area.BlockViewport this
         0: .line 85
            aload 0 /* this */
            getfield org.apache.fop.area.BlockViewport.clip:Z
            ireturn
        end local 0 // org.apache.fop.area.BlockViewport this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/apache/fop/area/BlockViewport;

  public java.awt.Rectangle getClipRectangle();
    descriptor: ()Ljava/awt/Rectangle;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=1, args_size=1
        start local 0 // org.apache.fop.area.BlockViewport this
         0: .line 90
            aload 0 /* this */
            getfield org.apache.fop.area.BlockViewport.clip:Z
            ifeq 2
         1: .line 91
            new java.awt.Rectangle
            dup
            aload 0 /* this */
            invokevirtual org.apache.fop.area.BlockViewport.getIPD:()I
            aload 0 /* this */
            invokevirtual org.apache.fop.area.BlockViewport.getBPD:()I
            invokespecial java.awt.Rectangle.<init>:(II)V
            areturn
         2: .line 93
      StackMap locals:
      StackMap stack:
            aconst_null
            areturn
        end local 0 // org.apache.fop.area.BlockViewport this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    3     0  this  Lorg/apache/fop/area/BlockViewport;

  public int getEffectiveIPD();
    descriptor: ()I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.apache.fop.area.BlockViewport this
         0: .line 98
            aload 0 /* this */
            invokevirtual org.apache.fop.area.BlockViewport.getIPD:()I
            ireturn
        end local 0 // org.apache.fop.area.BlockViewport this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/apache/fop/area/BlockViewport;
}
SourceFile: "BlockViewport.java"