gecko/layout/printing/nsPrintObject.cpp
Olli Pettay f0c80d0185 Bug 620158 - Crash while printing, r=mats, a=blocking
--HG--
extra : rebase_source : 9aab81626cf1d2e68f266a78ac4bbee780706067
2011-01-14 14:27:31 +02:00

143 lines
4.8 KiB
C++

/* -*- 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 "nsPrintObject.h"
#include "nsIContentViewer.h"
#include "nsIDOMDocument.h"
#include "nsContentUtils.h"
#include "nsIInterfaceRequestorUtils.h"
#include "nsPIDOMWindow.h"
#include "nsGkAtoms.h"
#include "nsComponentManagerUtils.h"
#include "nsIDocShellTreeItem.h"
#include "nsIBaseWindow.h"
//---------------------------------------------------
//-- nsPrintObject Class Impl
//---------------------------------------------------
nsPrintObject::nsPrintObject() :
mContent(nsnull), mFrameType(eFrame), mParent(nsnull),
mHasBeenPrinted(PR_FALSE), mDontPrint(PR_TRUE), mPrintAsIs(PR_FALSE),
mSharedPresShell(PR_FALSE), mInvisible(PR_FALSE), mDidCreateDocShell(PR_FALSE),
mShrinkRatio(1.0), mZoomRatio(1.0)
{
}
nsPrintObject::~nsPrintObject()
{
for (PRUint32 i=0;i<mKids.Length();i++) {
nsPrintObject* po = mKids[i];
delete po;
}
DestroyPresentation();
if (mDidCreateDocShell && mDocShell) {
nsCOMPtr<nsIBaseWindow> baseWin(do_QueryInterface(mDocShell));
if (baseWin) {
baseWin->Destroy();
}
}
mDocShell = nsnull;
mTreeOwner = nsnull; // mTreeOwner must be released after mDocShell;
}
//------------------------------------------------------------------
nsresult
nsPrintObject::Init(nsIDocShell* aDocShell, nsIDOMDocument* aDoc,
PRBool aPrintPreview)
{
mPrintPreview = aPrintPreview;
if (mPrintPreview || mParent) {
mDocShell = aDocShell;
} else {
mTreeOwner = do_GetInterface(aDocShell);
nsCOMPtr<nsIDocShellTreeItem> item = do_QueryInterface(aDocShell);
PRInt32 itemType = 0;
item->GetItemType(&itemType);
// Create a container docshell for printing.
mDocShell = do_CreateInstance("@mozilla.org/docshell;1");
NS_ENSURE_TRUE(mDocShell, NS_ERROR_OUT_OF_MEMORY);
mDidCreateDocShell = PR_TRUE;
nsCOMPtr<nsIDocShellTreeItem> newItem = do_QueryInterface(mDocShell);
newItem->SetItemType(itemType);
newItem->SetTreeOwner(mTreeOwner);
}
NS_ENSURE_TRUE(mDocShell, NS_ERROR_FAILURE);
nsCOMPtr<nsIDOMDocument> dummy = do_GetInterface(mDocShell);
nsCOMPtr<nsIContentViewer> viewer;
mDocShell->GetContentViewer(getter_AddRefs(viewer));
NS_ENSURE_STATE(viewer);
nsCOMPtr<nsIDocument> doc = do_QueryInterface(aDoc);
NS_ENSURE_STATE(doc);
if (mParent) {
nsCOMPtr<nsPIDOMWindow> window = doc->GetWindow();
if (window) {
mContent = do_QueryInterface(window->GetFrameElementInternal());
}
mDocument = doc;
return NS_OK;
}
mDocument = doc->CreateStaticClone(mDocShell);
nsCOMPtr<nsIDOMDocument> clonedDOMDoc = do_QueryInterface(mDocument);
NS_ENSURE_STATE(clonedDOMDoc);
viewer->SetDOMDocument(clonedDOMDoc);
return NS_OK;
}
//------------------------------------------------------------------
// Resets PO by destroying the presentation
void
nsPrintObject::DestroyPresentation()
{
mPresContext = nsnull;
if (mPresShell) {
mPresShell->EndObservingDocument();
nsAutoScriptBlocker scriptBlocker;
mPresShell->Destroy();
}
mPresShell = nsnull;
mViewManager = nsnull;
}