gecko-dev/layout/generic/nsIPageSequenceFrame.h

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
#ifndef nsIPageSequenceFrame_h___
#define nsIPageSequenceFrame_h___
#include "nslayout.h"
#include "nsISupports.h"
class nsIPresContext;
// 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}}
// IID for the nsIPrintStatusCallback interface
// a6cf90d3-15b3-11d2-932e-00805f8add32
#define NS_IPRINTSTATUSCALLBACK_IID \
{ 0xa6cf90d3, 0x15b3, 0x11d2,{0x93, 0x2e, 0x00, 0x80, 0x5f, 0x8a, 0xdd, 0x32}}
//----------------------------------------------------------------------
/**
* List of status codes that provide additional information about the
* progress of the print operation.
* @see nsIPrintStatusCallback#OnProgress()
*/
enum nsPrintStatus {
ePrintStatus_StartPage, // beginning the specified page
ePrintStatus_EndPage // finished with the specified page
};
/**
* List of print error codes.
* @see nsIPrintStatusCallback##OnError()
*/
enum nsPrintError {
ePrintError_Error, // unspecified error
ePrintError_Abort, // operation was aborted by the user
ePrintError_OutOfDisk, // system is out of disk space
ePrintError_OutOfMemory // system is out of memory
};
/**
* The page sequence frame provides information on the print operation by
* calling notification methods on the client's nsIPrintStatusCallback
* interface.
*/
class nsIPrintStatusCallback : public nsISupports {
public:
/**
* Indicates the current progress of the print operation.
*
* @param aPageNumber the number of the current page
* @param aTotalPages the total number of pages
* @param aStatusCode additional information regarding the progress
* @param aContinuePrinting return PR_TRUE to continue printing and
* PR_FALSE to cancel the printing operation
*/
NS_IMETHOD OnProgress(PRInt32 aPageNumber,
PRInt32 aTotalPages,
nsPrintStatus aStatusCode,
PRBool& aContinuePrinting) = 0;
/**
* Notification that an error has occured.
*/
NS_IMETHOD OnError(nsPrintError aErrorCode) = 0;
};
//----------------------------------------------------------------------
enum nsPrintRange {
ePrintRange_AllPages, // print all pages
ePrintRange_SpecifiedRange // only print pages in the specified range
};
/**
* Structure containing options for printing.
*/
struct nsPrintOptions {
nsPrintRange range;
PRInt32 startPage, endPage; // only used for ePrintRange_SpecifiedRange
PRPackedBool oddNumberedPages; // print the odd-numbered pages
PRPackedBool evenNumberedPages; // print the even-numbered pages
nsPrintOptions() {
range = ePrintRange_AllPages;
startPage = endPage = 1;
oddNumberedPages = evenNumberedPages = PR_TRUE;
}
};
/**
* Interface for accessing special capabilities of the page sequence frame.
*
* Today all that exists are member functions for printing.
*/
class nsIPageSequenceFrame : public nsISupports {
public:
/**
* 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
* @see nsIPrintStatusCallback#OnProgress()
*/
NS_IMETHOD Print(nsIPresContext& aPresContext,
const nsPrintOptions& aPrintOptions,
nsIPrintStatusCallback* aStatusCallback) = 0;
private:
NS_IMETHOD_(nsrefcnt) AddRef(void) = 0;
NS_IMETHOD_(nsrefcnt) Release(void) = 0;
};
#endif /* nsIPageSequenceFrame_h___ */