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## org.apache.fop.area
Class AreaTreeModel

    java.lang.Object
      org.apache.fop.area.AreaTreeModel

Direct Known Subclasses:
  RenderPagesModel

public class AreaTreeModel
extends java.lang.Object

This is the model for the area tree object. The model implementation can handle the page sequence, page and off-document items. The methods to access the page viewports can only assume the PageViewport is valid as it remains for the life of the area tree model.

Field Summary
`protected PageSequence` | `currentPageSequence` the current page sequence
`protected static org.apache.commons.logging.Log` | `log` logger instance

Constructor Summary
`AreaTreeModel()` Create a new store pages model

Method Summary
`void` | `addPage(PageViewport page)` Add a page to this model.
`void` | `endDocument()` Signal the end of the document for any processing.
`PageSequence` | `getCurrentPageSequence()` Returns the currently active page-sequence.
`PageViewport` | `getPage(int seq, int count)` Get the page for a position in the document.
`int` | `getPageCount(int seq)` Get the page count.
`int` | `getPageSequenceCount()` Get the page sequence count.
`void` | `handleOffDocumentItem(OffDocumentItem ext)` Handle an OffDocumentItem
`void` | `startPageSequence(PageSequence pageSequence)` Start a page sequence on this model.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

### currentPageSequence

    protected PageSequence currentPageSequence

  the current page sequence

### log

    protected static org.apache.commons.logging.Log log

  logger instance

Constructor Detail

### AreaTreeModel

    public AreaTreeModel()

  Create a new store pages model

Method Detail

### startPageSequence

    public void startPageSequence(PageSequence pageSequence)

  Start a page sequence on this model.

  Parameters:
    `pageSequence` - the page sequence about to start

### addPage

    public void addPage(PageViewport page)

  Add a page to this model.

  Parameters:
    `page` - the page to add to the model.

### handleOffDocumentItem

    public void handleOffDocumentItem(OffDocumentItem ext)

  Handle an OffDocumentItem

  Parameters:
    `ext` - the extension to handle

### endDocument

    public void endDocument()
                     throws org.xml.sax.SAXException

  Signal the end of the document for any processing.

  Throws:
    `org.xml.sax.SAXException` - if a problem was encountered.

### getCurrentPageSequence

    public PageSequence getCurrentPageSequence()

  Returns the currently active page-sequence.

  Returns:
    the currently active page-sequence

### getPageSequenceCount

    public int getPageSequenceCount()

  Get the page sequence count.

  Returns:
    the number of page sequences in the document.

### getPageCount

    public int getPageCount(int seq)

  Get the page count.

  Parameters:
    `seq` - the page sequence to count.
  Returns:
    returns the number of pages in a page sequence

### getPage

    public PageViewport getPage(int seq,
                                int count)

  Get the page for a position in the document.

  Parameters:
    `seq` - the page sequence number
    `count` - the page count in the sequence
  Returns:
    the PageViewport for the particular page

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