Class TXTState

java.lang.Object
org.apache.fop.render.txt.TXTState
public class TXTState extends Object
This keeps information about the current state when writing to txt, i.e. manages coordinate transformation matrices for getting absolute coordinates.

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    private CTM
    resultCTM
    Current result coordinate transformation matrix.
    private LinkedList
    stackCTM
    Keeps all coordinate transformation matrices during rendering.

  • Constructor Summary

    Constructors
    Constructor
    Description
    TXTState()
    Constructs a newly allocated TXTState object.

  • Method Summary

    Modifier and Type
    Method
    Description
    private void
    calcResultCTM()
    Recalculate current result coordinate transformation matrix.
    CTM
    getResultCTM()
     
    void
    pop()
    Pop the coordinate transformation matrix from the stack and reevaluate resultCTM.
    void
    push(CTM ctm)
    Push the current coordinate transformation matrix onto the stack and reevaluate resultCTM.
    CTM
    refineCTM(CTM ctm)
    Modifies coordinate transformation matrix in such a way, so x-shift and y-shift will be transformed in text positions.
    Point
    transformPoint(int x, int y)
    Transforms point (x, y) using resultCTM.
    Point
    transformPoint(Point p, CTM ctm)
    Transforms point using ctm.
    private void
    updateResultCTM(CTM ctm)
    Updates result coordinate transformation matrix (i.e.

    Methods inherited from class Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Field Details

    • stackCTM

      private LinkedList stackCTM
      Keeps all coordinate transformation matrices during rendering.

    • resultCTM

      private CTM resultCTM
      Current result coordinate transformation matrix. It's product of all matrices in order, saved in stackCTM.

  • Constructor Details

    • TXTState

      public TXTState()
      Constructs a newly allocated TXTState object.

  • Method Details

    • updateResultCTM

      private void updateResultCTM(CTM ctm)
      Updates result coordinate transformation matrix (i.e. resultCTM), multipliing it by given matrix.
      Parameters:
      ctm - CTM

    • calcResultCTM

      private void calcResultCTM()
      Recalculate current result coordinate transformation matrix.

    • push

      public void push(CTM ctm)
      Push the current coordinate transformation matrix onto the stack and reevaluate resultCTM.
      Parameters:
      ctm - instance of CTM

    • pop

      public void pop()
      Pop the coordinate transformation matrix from the stack and reevaluate resultCTM.

    • refineCTM

      public CTM refineCTM(CTM ctm)
      Modifies coordinate transformation matrix in such a way, so x-shift and y-shift will be transformed in text positions.
      Parameters:
      ctm - CTM to modify
      Returns:
      instance of CTM

    • transformPoint

      public Point transformPoint(Point p, CTM ctm)
      Transforms point using ctm.
      Parameters:
      p - Point
      ctm - CTM
      Returns:
      transformed Point

    • transformPoint

      public Point transformPoint(int x, int y)
      Transforms point (x, y) using resultCTM.
      Parameters:
      x - x-coordinate
      y - y-coordinate
      Returns:
      transformed Point

    • getResultCTM

      public CTM getResultCTM()
      Returns:
      current result coordinate transformation matrix