gecko/layout/printing/nsPagePrintTimer.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsPagePrintTimer.h"
#include "nsIContentViewer.h"
#include "nsIServiceManager.h"
#include "nsPrintEngine.h"
NS_IMPL_ISUPPORTS1(nsPagePrintTimer, nsITimerCallback)
nsPagePrintTimer::nsPagePrintTimer() :
mPrintEngine(nsnull),
mDelay(0),
mFiringCount(0),
mPrintObj(nsnull)
{
}
nsPagePrintTimer::~nsPagePrintTimer()
{
// "Destroy" the document viewer; this normally doesn't actually
// destroy it because of the IncrementDestroyRefCount call below
// XXX This is messy; the document viewer should use a single approach
// to keep itself alive during printing
nsCOMPtr<nsIContentViewer> cv(do_QueryInterface(mDocViewerPrint));
if (cv) {
cv->Destroy();
}
}
nsresult
nsPagePrintTimer::StartTimer(PRBool aUseDelay)
{
nsresult result;
mTimer = do_CreateInstance("@mozilla.org/timer;1", &result);
if (NS_FAILED(result)) {
NS_WARNING("unable to start the timer");
} else {
PRUint32 delay = 0;
if (aUseDelay) {
if (mFiringCount < 10) {
// Longer delay for the few first pages.
delay = mDelay + ((10 - mFiringCount) * 100);
} else {
delay = mDelay;
}
}
mTimer->InitWithCallback(this, delay, nsITimer::TYPE_ONE_SHOT);
}
return result;
}
// nsITimerCallback
NS_IMETHODIMP
nsPagePrintTimer::Notify(nsITimer *timer)
{
if (mDocViewerPrint) {
PRPackedBool initNewTimer = PR_TRUE;
// Check to see if we are done
// inRange will be true if a page is actually printed
PRBool inRange;
// donePrinting will be true if it completed successfully or
// if the printing was cancelled
PRBool donePrinting = mPrintEngine->PrintPage(mPrintObj, inRange);
if (donePrinting) {
// now clean up print or print the next webshell
if (mPrintEngine->DonePrintingPages(mPrintObj, NS_OK)) {
initNewTimer = PR_FALSE;
}
}
// Note that the Stop() destroys this after the print job finishes
// (The PrintEngine stops holding a reference when DonePrintingPages
// returns true.)
Stop();
if (initNewTimer) {
++mFiringCount;
nsresult result = StartTimer(inRange);
if (NS_FAILED(result)) {
donePrinting = PR_TRUE; // had a failure.. we are finished..
mPrintEngine->SetIsPrinting(PR_FALSE);
}
}
}
return NS_OK;
}
void
nsPagePrintTimer::Init(nsPrintEngine* aPrintEngine,
nsIDocumentViewerPrint* aDocViewerPrint,
PRUint32 aDelay)
{
mPrintEngine = aPrintEngine;
mDocViewerPrint = aDocViewerPrint;
mDelay = aDelay;
mDocViewerPrint->IncrementDestroyRefCount();
}
nsresult
nsPagePrintTimer::Start(nsPrintObject* aPO)
{
mPrintObj = aPO;
return StartTimer(PR_FALSE);
}
void
nsPagePrintTimer::Stop()
{
if (mTimer) {
mTimer->Cancel();
mTimer = nsnull;
}
}
nsresult NS_NewPagePrintTimer(nsPagePrintTimer **aResult)
{
NS_PRECONDITION(aResult, "null param");
nsPagePrintTimer* result = new nsPagePrintTimer;
if (!result) {
*aResult = nsnull;
return NS_ERROR_OUT_OF_MEMORY;
}
NS_ADDREF(result);
*aResult = result;
return NS_OK;
}