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faeec71701
--HG-- rename : content/html/content/public/nsHTMLCanvasElement.h => content/html/content/public/HTMLCanvasElement.h rename : content/html/content/src/nsHTMLCanvasElement.cpp => content/html/content/src/HTMLCanvasElement.cpp
90 lines
2.3 KiB
C++
90 lines
2.3 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include <stdlib.h>
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#include <stdarg.h>
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#include "prprf.h"
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#include "nsIServiceManager.h"
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#include "nsIConsoleService.h"
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#include "nsIDOMCanvasRenderingContext2D.h"
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#include "nsICanvasRenderingContextInternal.h"
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#include "nsIHTMLCollection.h"
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#include "mozilla/dom/HTMLCanvasElement.h"
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#include "nsIPrincipal.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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#include "mozilla/gfx/Matrix.h"
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using namespace mozilla::gfx;
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namespace mozilla {
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namespace CanvasUtils {
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void
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DoDrawImageSecurityCheck(dom::HTMLCanvasElement *aCanvasElement,
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nsIPrincipal *aPrincipal,
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bool forceWriteOnly,
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bool CORSUsed)
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{
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NS_PRECONDITION(aPrincipal, "Must have a principal here");
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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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// No need to do a security check if the image used CORS for the load
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if (CORSUsed)
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return;
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// Ignore document.domain in this check.
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bool subsumes;
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nsresult rv =
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aCanvasElement->NodePrincipal()->SubsumesIgnoringDomain(aPrincipal,
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&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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aCanvasElement->SetWriteOnly();
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}
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bool
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CoerceDouble(jsval v, double* d)
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{
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if (JSVAL_IS_DOUBLE(v)) {
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*d = JSVAL_TO_DOUBLE(v);
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} else if (JSVAL_IS_INT(v)) {
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*d = double(JSVAL_TO_INT(v));
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} else if (JSVAL_IS_VOID(v)) {
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*d = 0.0;
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} else {
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return false;
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}
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return true;
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}
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} // namespace CanvasUtils
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} // namespace mozilla
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