2009-06-25 13:30:56 -07:00
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/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Vladimir Vukicevic <vladimir@pobox.com>
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* Portions created by the Initial Developer are Copyright (C) 2009
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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2009-09-02 17:47:49 -07:00
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#include <stdlib.h>
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#include <stdarg.h>
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2009-06-25 13:30:56 -07:00
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#include "prmem.h"
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2009-09-04 14:57:33 -07:00
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#include "prprf.h"
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2009-06-25 13:30:56 -07:00
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#include "nsIServiceManager.h"
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2009-09-02 17:47:49 -07:00
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#include "nsIConsoleService.h"
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2009-06-25 13:30:56 -07:00
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#include "nsIDOMDocument.h"
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#include "nsIDocument.h"
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#include "nsIDOMCanvasRenderingContext2D.h"
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#include "nsICanvasRenderingContextInternal.h"
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#include "nsICanvasElement.h"
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#include "nsIPrincipal.h"
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#include "nsINode.h"
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#include "nsGfxCIID.h"
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#include "nsTArray.h"
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#include "CanvasUtils.h"
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using namespace mozilla;
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void
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CanvasUtils::DoDrawImageSecurityCheck(nsICanvasElement *aCanvasElement,
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nsIPrincipal *aPrincipal,
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PRBool forceWriteOnly)
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{
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// Callers should ensure that mCanvasElement is non-null before calling this
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if (!aCanvasElement) {
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NS_WARNING("DoDrawImageSecurityCheck called without canvas element!");
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return;
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}
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if (aCanvasElement->IsWriteOnly())
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return;
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// If we explicitly set WriteOnly just do it and get out
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if (forceWriteOnly) {
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aCanvasElement->SetWriteOnly();
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return;
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}
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if (aPrincipal == nsnull)
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return;
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nsCOMPtr<nsINode> elem = do_QueryInterface(aCanvasElement);
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if (elem) { // XXXbz How could this actually be null?
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PRBool subsumes;
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nsresult rv =
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elem->NodePrincipal()->Subsumes(aPrincipal, &subsumes);
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if (NS_SUCCEEDED(rv) && subsumes) {
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// This canvas has access to that image anyway
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return;
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}
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}
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aCanvasElement->SetWriteOnly();
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}
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2009-09-02 17:47:49 -07:00
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void
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CanvasUtils::LogMessage (const nsCString& errorString)
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{
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nsCOMPtr<nsIConsoleService> console(do_GetService(NS_CONSOLESERVICE_CONTRACTID));
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if (!console)
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return;
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console->LogStringMessage(NS_ConvertUTF8toUTF16(errorString).get());
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fprintf(stderr, "%s\n", errorString.get());
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}
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void
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CanvasUtils::LogMessagef (const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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char buf[256];
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nsCOMPtr<nsIConsoleService> console(do_GetService(NS_CONSOLESERVICE_CONTRACTID));
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if (console) {
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2009-09-04 14:57:33 -07:00
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PR_vsnprintf(buf, 256, fmt, ap);
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2009-09-02 17:47:49 -07:00
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console->LogStringMessage(NS_ConvertUTF8toUTF16(nsDependentCString(buf)).get());
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fprintf(stderr, "%s\n", buf);
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}
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va_end(ap);
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}
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