xfrecord.java

jexcelapi_2_4, JXL的API, JXL是JAVA读取EXCEL的开源项目

  protected void setXFBorder(Border b, BorderLineStyle ls)
  {
    Assert.verify(!initialized);

    if (b == Border.LEFT)
    {
      leftBorder = ls;
    }
    else if (b == Border.RIGHT)
    {
      rightBorder = ls;
    }
    else if (b == Border.TOP)
    {
      topBorder = ls;
    }
    else if (b == Border.BOTTOM)
    {
      bottomBorder = ls;
    }
    return;
  }

  /**
   * Gets the line style for the given cell border
   * If a border type of ALL or NONE is specified, then a line style of
   * NONE is returned
   *
   * @param border the cell border we are interested in
   * @return the line style of the specified border
   */
  public BorderLineStyle getBorder(Border border)
  {
    // Don't bother with the short cut records
    if (border == Border.NONE ||
        border == Border.ALL)
    {
      return BorderLineStyle.NONE;
    }

    if (!formatInfoInitialized)
    {
      initializeFormatInformation();
    }

    if (border == Border.LEFT)
    {
      return leftBorder;
    }
    else if (border == Border.RIGHT)
    {
      return rightBorder;
    }
    else if (border == Border.TOP)
    {
      return topBorder;
    }
    else if (border == Border.BOTTOM)
    {
      return bottomBorder;
    }

    return BorderLineStyle.NONE;
  }

  /**
   * Determines if this cell format has any borders at all.  Used to
   * set the new borders when merging a group of cells
   *
   * @return TRUE if this cell has any borders, FALSE otherwise
   */
  public final boolean hasBorders()
  {
    if (!formatInfoInitialized)
    {
      initializeFormatInformation();
    }

    if (leftBorder   == BorderLineStyle.NONE &&
        rightBorder  == BorderLineStyle.NONE &&
        topBorder    == BorderLineStyle.NONE &&
        bottomBorder == BorderLineStyle.NONE)
    {
      return false;
    }

    return true;
  }

  /**
   * If this cell has not been read in from an existing Excel sheet,
   * then initializes this record with the XF index passed in. Calls
   * initialized on the font and format record
   *
   * @param pos the xf index to initialize this record with
   * @param fr the containing formatting records
   * @param fonts the container for the fonts
   * @exception NumFormatRecordsException
   */
  public final void initialize(int pos, FormattingRecords fr, Fonts fonts)
    throws NumFormatRecordsException
  {
    xfIndex = pos;
    formattingRecords = fr;

    // If this file has been read in or copied,
    // the font and format indexes will
    // already be initialized, so just set the initialized flag and
    // return
    if (read || copied)
    {
      initialized = true;
      return;
    }

    if (!font.isInitialized())
    {
      fonts.addFont(font);
    }

    if (!format.isInitialized())
    {
      fr.addFormat(format);
    }

    fontIndex = font.getFontIndex();
    formatIndex = format.getFormatIndex();

    initialized = true;
  }

  /**
   * Resets the initialize flag.  This is called by the constructor of
   * WritableWorkbookImpl to reset the statically declared fonts
   */
  public final void uninitialize()
  {
    initialized = false;
  }

  /**
   * Sets the XF index.  Called when rationalizing the XF records
   * immediately prior to writing
   *
   * @param xfi the new xf index
   */
  final void setXFIndex(int xfi)
  {
    xfIndex = xfi;
  }

  /**
   * Accessor for the XF index
   *
   * @return the XF index for this cell
   */
  public final int getXFIndex()
  {
    return xfIndex;
  }

  /**
   * Accessor to see if this format is initialized
   *
   * @return TRUE if this format is initialized, FALSE otherwise
   */
  public final boolean isInitialized()
  {
    return initialized;
  }

  /**
   * Accessor to see if this format was read in.  Used when checking merged
   * cells
   *
   * @return TRUE if this XF record was read in, FALSE if it was generated by
   *         the user API
   */
  public final boolean isRead()
  {
    return read;
  }

  /**
   * Gets the format used by this format
   *
   * @return the format
   */
  public Format getFormat()
  {
    if (!formatInfoInitialized)
    {
      initializeFormatInformation();
    }
    return excelFormat;
  }

  /**
   * Gets the font used by this format
   *
   * @return the font
   */
  public Font getFont()
  {
    if (!formatInfoInitialized)
    {
      initializeFormatInformation();
    }
    return font;
  }

  /**
   * Initializes the internal format information from the data read in
   */
  private void initializeFormatInformation()
  {
    // Initialize the cell format string
    if (formatIndex < BuiltInFormat.builtIns.length &&
        BuiltInFormat.builtIns[formatIndex] != null)
    {
      excelFormat = BuiltInFormat.builtIns[formatIndex];
    }
    else
    {
      excelFormat = formattingRecords.getFormatRecord(formatIndex);
    }

    // Initialize the font
    font = formattingRecords.getFonts().getFont(fontIndex);

    // Initialize the cell format data from the binary record
    byte[] data = getRecord().getData();

    // Get the parent record
    int cellAttributes = IntegerHelper.getInt(data[4], data[5]);
    parentFormat = (cellAttributes & 0xfff0) >> 4;
    int formatType = cellAttributes & 0x4;
    xfFormatType = formatType == 0 ? cell : style;
    locked = ((cellAttributes & 0x1) != 0);
    hidden = ((cellAttributes & 0x2) != 0);

    int alignMask = IntegerHelper.getInt(data[6], data[7]);

    // Get the wrap
    if ((alignMask & 0x08) != 0)
    {
      wrap = true;
    }

    // Get the horizontal alignment
    align = Alignment.getAlignment(alignMask & 0x7);

    // Get the vertical alignment
    valign = VerticalAlignment.getAlignment((alignMask >> 4) & 0x7);

    // Get the orientation
    orientation = Orientation.getOrientation((alignMask >> 8) & 0xff);

    int attr = IntegerHelper.getInt(data[8], data[9]);

    // Get the shrink to fit flag
    shrinkToFit = (attr & 0x10) != 0;

    // Get the used attribute
    if (biffType == biff8)
    {
      usedAttributes = data[9];
    }

    // Get the borders
    int borderMask = IntegerHelper.getInt(data[10], data[11]);

    leftBorder   = BorderLineStyle.getStyle(borderMask & 0x7);
    rightBorder  = BorderLineStyle.getStyle((borderMask >> 4) & 0x7);
    topBorder    = BorderLineStyle.getStyle((borderMask >> 8) & 0x7);
    bottomBorder = BorderLineStyle.getStyle((borderMask >> 12) & 0x7);

    if (biffType == biff8)
    {
      // Get the background pattern
      int patternVal = IntegerHelper.getInt(data[16], data[17]);
      pattern = Pattern.getPattern(patternVal);

      // Get the background colour
      int colourPaletteMask = IntegerHelper.getInt(data[18], data[19]);
      backgroundColour = Colour.getInternalColour(colourPaletteMask & 0x3f);


      if (backgroundColour == Colour.UNKNOWN ||
          backgroundColour == Colour.DEFAULT_BACKGROUND1)
      {
        backgroundColour = Colour.DEFAULT_BACKGROUND;
      }
    }
    else
    {
      pattern = Pattern.NONE;
      backgroundColour = Colour.DEFAULT_BACKGROUND;
    }

    // Set the lazy initialization flag
    formatInfoInitialized = true;
  }

  /**
   * Standard hash code implementation
   * @return the hash code
   */
  public int hashCode()
  {
    return 17;
  }

  /**
   * Equals method.  This is called when comparing writable formats
   * in order to prevent duplicate formats being added to the workbook
   *
   * @param o object to compare
   * @return TRUE if the objects are equal, FALSE otherwise
   */
  public boolean equals(Object o)
  {
    if (o == this)
    {
      return true;
    }

    if (!(o instanceof XFRecord))
    {
      return false;
    }

    XFRecord xfr = (XFRecord) o;

    // Both records must be writable and have their format info initialized
    if (!formatInfoInitialized)
    {
      initializeFormatInformation();
    }

    if (!xfr.formatInfoInitialized)
    {
      xfr.initializeFormatInformation();
    }

    if (xfFormatType   != xfr.xfFormatType ||
        parentFormat   != parentFormat ||
        locked         != xfr.locked ||
        hidden         != xfr.hidden ||
        usedAttributes != xfr.usedAttributes)
    {
      return false;
    }

    if (align       != xfr.align ||
        valign      != xfr.valign ||
        orientation != xfr.orientation ||
        wrap        != xfr.wrap ||
        shrinkToFit != xfr.shrinkToFit)
    {
      return false;
    }

    if (leftBorder   != xfr.leftBorder ||
        rightBorder  != xfr.rightBorder ||
        topBorder    != xfr.topBorder ||
        bottomBorder != xfr.bottomBorder)
    {
      return false;
    }

    if (backgroundColour != xfr.backgroundColour ||
        pattern          != xfr.pattern)
    {
      return false;
    }

    // Sufficient to just do shallow equals on font, format objects,
    // since we are testing for the presence of clones anwyay
    // Use indices rather than objects because of the rationalization
    // process (which does not set the object on an XFRecord)
    if (fontIndex   != xfr.fontIndex ||
        formatIndex != xfr.formatIndex)
    {
      return false;
    }

    return true;
  }

  /**
   * Sets the format index.  This is called during the rationalization process
   * when some of the duplicate number formats have been removed
   * @param newindex the new format index
   */
  void setFormatIndex(int newindex)
  {
    formatIndex = newindex;
  }

  /**
   * Accessor for the font index.  Called by the FormattingRecords objects
   * during the rationalization process
   * @return the font index
   */
  int getFontIndex()
  {
    return fontIndex;
  }


  /**
   * Sets the font index.  This is called during the rationalization process
   * when some of the duplicate fonts have been removed
   * @param newindex the new index
   */
  void setFontIndex(int newindex)
  {
    fontIndex = newindex;
  }

  /**
   * Sets the format type and parent format from the writable subclass
   * @param t the xf type
   * @param pf the parent format
   */
  protected void setXFDetails(XFType t, int pf)
  {
    xfFormatType = t;
    parentFormat = pf;
  }

  /**
   * Changes the appropriate indexes during the rationalization process
   * @param xfMapping the xf index re-mappings
   */
  void rationalize(IndexMapping xfMapping)
  {
    xfIndex = xfMapping.getNewIndex(xfIndex);

    if (xfFormatType == cell)
    {
      parentFormat = xfMapping.getNewIndex(parentFormat);
    }
  }
}