gecko/layout/generic/nsIPageSequenceFrame.h

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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 * for the specific language governing rights and limitations under the
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 *
 * The Original Code is mozilla.org code.
 *
 * The Initial Developer of the Original Code is
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 * Portions created by the Initial Developer are Copyright (C) 1998
 * the Initial Developer. All Rights Reserved.
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 * Contributor(s):
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#ifndef nsIPageSequenceFrame_h___
#define nsIPageSequenceFrame_h___

#include "nsISupports.h"
#include "nsRect.h"

class nsPresContext;
class nsIPrintSettings;

// IID for the nsIPageSequenceFrame interface 
// a6cf90d2-15b3-11d2-932e-00805f8add32
#define NS_IPAGESEQUENCEFRAME_IID \
 { 0xa6cf90d2, 0x15b3, 0x11d2,{0x93, 0x2e, 0x00, 0x80, 0x5f, 0x8a, 0xdd, 0x32}}

//----------------------------------------------------------------------

/**
 * Interface for accessing special capabilities of the page sequence frame.
 *
 * Today all that exists are member functions for printing.
 */
class nsIPageSequenceFrame : public nsISupports {
public:
  NS_DECLARE_STATIC_IID_ACCESSOR(NS_IPAGESEQUENCEFRAME_IID)

  /**
   * Print the set of pages.
   *
   * @param   aPrintOptions options for printing
   * @param   aStatusCallback interface that the client provides to receive
   *            progress notifications. Can be NULL
   * @return  NS_OK if successful
   *          NS_ERROR_ABORT if the client cancels printing using the callback
   *            interface
   *          NS_ERROR_INVALID_ARG if printing a range of pages (not all pages)
   *            and the start page is greater than the total number of pages
   *          NS_ERROR_FAILURE if there is an error
   */
  NS_IMETHOD StartPrint(nsPresContext*  aPresContext,
                        nsIPrintSettings* aPrintOptions,
                        PRUnichar* aDocTitle,
                        PRUnichar* aDocURL) = 0;
  NS_IMETHOD PrintNextPage() = 0;
  NS_IMETHOD GetCurrentPageNum(PRInt32* aPageNum) = 0;
  NS_IMETHOD GetNumPages(PRInt32* aNumPages) = 0;
  NS_IMETHOD IsDoingPrintRange(PRBool* aDoing) = 0;
  NS_IMETHOD GetPrintRange(PRInt32* aFromPage, PRInt32* aToPage) = 0;

  NS_IMETHOD DoPageEnd() = 0;
  NS_IMETHOD SetSelectionHeight(nscoord aYOffset, nscoord aHeight) = 0;

  NS_IMETHOD SetTotalNumPages(PRInt32 aTotal) = 0;

  // Gets the dead space (the gray area) around the Print Preview Page
  NS_IMETHOD GetDeadSpaceValue(nscoord* aValue) = 0;

  // For Shrink To Fit
  NS_IMETHOD GetSTFPercent(float& aSTFPercent) = 0;
  
private:
  NS_IMETHOD_(nsrefcnt) AddRef(void) = 0;
  NS_IMETHOD_(nsrefcnt) Release(void) = 0;
};

NS_DEFINE_STATIC_IID_ACCESSOR(nsIPageSequenceFrame, NS_IPAGESEQUENCEFRAME_IID)

#endif /* nsIPageSequenceFrame_h___ */