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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/* This class wraps an SVG document, for use by VectorImage objects. */
#ifndef mozilla_image_SVGDocumentWrapper_h
#define mozilla_image_SVGDocumentWrapper_h
#include "mozilla/Attributes.h"
#include "nsCOMPtr.h"
#include "nsIStreamListener.h"
#include "nsIObserver.h"
#include "nsIContentViewer.h"
#include "nsWeakReference.h"
#include "nsSize.h"
class nsIPresShell;
class nsIRequest;
class nsILoadGroup;
class nsIFrame;
#define OBSERVER_SVC_CID "@mozilla.org/observer-service;1"
// undef the GetCurrentTime macro defined in WinBase.h from the MS Platform SDK
#undef GetCurrentTime
namespace mozilla {
namespace dom {
class SVGSVGElement;
} // namespace dom
namespace image {
class SVGDocumentWrapper final : public nsIStreamListener,
public nsIObserver,
nsSupportsWeakReference
{
public:
SVGDocumentWrapper();
NS_DECL_ISUPPORTS
NS_DECL_NSISTREAMLISTENER
NS_DECL_NSIREQUESTOBSERVER
NS_DECL_NSIOBSERVER
enum Dimension {
eWidth,
eHeight
};
/**
* Returns the wrapped document, or nullptr on failure. (No AddRef.)
*/
nsIDocument* GetDocument();
/**
* Returns the root <svg> element for the wrapped document, or nullptr on
* failure.
*/
mozilla::dom::SVGSVGElement* GetRootSVGElem();
/**
* Returns the root nsIFrame* for the wrapped document, or nullptr on failure.
*
* @return the root nsIFrame* for the wrapped document, or nullptr on failure.
*/
nsIFrame* GetRootLayoutFrame();
/**
* Returns (by reference) the nsIPresShell for the wrapped document.
*
* @param[out] aPresShell On success, this will be populated with a pointer
* to the wrapped document's nsIPresShell.
*
* @return NS_OK on success, or an error code on failure.
*/
inline nsresult GetPresShell(nsIPresShell** aPresShell)
{ return mViewer->GetPresShell(aPresShell); }
/**
* Modifier to update the viewport dimensions of the wrapped document. This
* method performs a synchronous "Flush_Layout" on the wrapped document,
* since a viewport-change affects layout.
*
* @param aViewportSize The new viewport dimensions.
*/
void UpdateViewportBounds(const nsIntSize& aViewportSize);
/**
* If an SVG image's helper document has a pending notification for an
* override on the root node's "preserveAspectRatio" attribute, then this
* method will flush that notification so that the image can paint correctly.
* (First, though, it sets the mIgnoreInvalidation flag so that we won't
* notify the image's observers and trigger unwanted repaint-requests.)
*/
void FlushImageTransformInvalidation();
/**
* Returns a bool indicating whether the document has any SMIL animations.
*
* @return true if the document has any SMIL animations. Else, false.
*/
bool IsAnimated();
/**
* Indicates whether we should currently ignore rendering invalidations sent
* from the wrapped SVG doc.
*
* @return true if we should ignore invalidations sent from this SVG doc.
*/
bool ShouldIgnoreInvalidation() { return mIgnoreInvalidation; }
/**
* Methods to control animation.
*/
void StartAnimation();
void StopAnimation();
void ResetAnimation();
float GetCurrentTime();
void SetCurrentTime(float aTime);
void TickRefreshDriver();
/**
* Force a layout flush of the underlying SVG document.
*/
void FlushLayout();
private:
~SVGDocumentWrapper();
nsresult SetupViewer(nsIRequest* aRequest,
nsIContentViewer** aViewer,
nsILoadGroup** aLoadGroup);
void DestroyViewer();
void RegisterForXPCOMShutdown();
void UnregisterForXPCOMShutdown();
nsCOMPtr<nsIContentViewer> mViewer;
nsCOMPtr<nsILoadGroup> mLoadGroup;
nsCOMPtr<nsIStreamListener> mListener;
bool mIgnoreInvalidation;
bool mRegisteredForXPCOMShutdown;
};
} // namespace image
} // namespace mozilla
#endif // mozilla_image_SVGDocumentWrapper_h
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