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-rw-r--r--image/SVGDocumentWrapper.h157
1 files changed, 157 insertions, 0 deletions
diff --git a/image/SVGDocumentWrapper.h b/image/SVGDocumentWrapper.h
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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 "nsIDocumentViewer.h"
+#include "nsWeakReference.h"
+#include "nsSize.h"
+
+class nsIRequest;
+class nsILoadGroup;
+class nsIFrame;
+
+#define OBSERVER_SVC_CID "@mozilla.org/observer-service;1"
+
+namespace mozilla {
+class PresShell;
+namespace dom {
+class SVGSVGElement;
+class SVGDocument;
+} // namespace dom
+
+namespace image {
+class AutoRestoreSVGState;
+
+class SVGDocumentWrapper final : public nsIStreamListener,
+ public nsIObserver,
+ public 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.)
+ */
+ mozilla::dom::SVGDocument* 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 the mozilla::PresShell for the wrapped document.
+ */
+ inline mozilla::PresShell* GetPresShell() { return mViewer->GetPresShell(); }
+
+ /**
+ * Modifier to update the viewport dimensions of the wrapped document. This
+ * method performs a synchronous "FlushType::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; }
+
+ /**
+ * Returns a bool indicating whether the document is currently drawing.
+ *
+ * @return true if the document is drawing. Else, false.
+ */
+ bool IsDrawing() const { return mIsDrawing; }
+
+ /**
+ * Methods to control animation.
+ */
+ void StartAnimation();
+ void StopAnimation();
+ void ResetAnimation();
+ float GetCurrentTimeAsFloat();
+ void SetCurrentTime(float aTime);
+ void TickRefreshDriver();
+
+ /**
+ * Force a layout flush of the underlying SVG document.
+ */
+ void FlushLayout();
+
+ private:
+ friend class AutoRestoreSVGState;
+
+ ~SVGDocumentWrapper();
+
+ nsresult SetupViewer(nsIRequest* aRequest, nsIDocumentViewer** aViewer,
+ nsILoadGroup** aLoadGroup);
+ void DestroyViewer();
+ void RegisterForXPCOMShutdown();
+ void UnregisterForXPCOMShutdown();
+
+ nsCOMPtr<nsIDocumentViewer> mViewer;
+ nsCOMPtr<nsILoadGroup> mLoadGroup;
+ nsCOMPtr<nsIStreamListener> mListener;
+ bool mIgnoreInvalidation;
+ bool mRegisteredForXPCOMShutdown;
+ bool mIsDrawing;
+};
+
+} // namespace image
+} // namespace mozilla
+
+/**
+ * Casting SVGDocumentWrapper to nsISupports is ambiguous. This method handles
+ * that.
+ */
+inline nsISupports* ToSupports(mozilla::image::SVGDocumentWrapper* p) {
+ return NS_ISUPPORTS_CAST(nsSupportsWeakReference*, p);
+}
+
+#endif // mozilla_image_SVGDocumentWrapper_h