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-rw-r--r--image/AutoRestoreSVGState.h72
1 files changed, 72 insertions, 0 deletions
diff --git a/image/AutoRestoreSVGState.h b/image/AutoRestoreSVGState.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/. */
+
+#ifndef mozilla_image_AutoRestoreSVGState_h
+#define mozilla_image_AutoRestoreSVGState_h
+
+#include "mozilla/Attributes.h"
+#include "mozilla/AutoRestore.h"
+#include "mozilla/SVGContextPaint.h"
+#include "mozilla/dom/SVGSVGElement.h"
+#include "nsPresContext.h"
+#include "SVGDrawingParameters.h"
+#include "SVGDocumentWrapper.h"
+#include "mozilla/dom/DocumentInlines.h"
+#include "mozilla/dom/SVGDocument.h"
+#include "mozilla/dom/BrowsingContextBinding.h"
+
+namespace mozilla::image {
+
+class MOZ_STACK_CLASS AutoRestoreSVGState final {
+ public:
+ AutoRestoreSVGState(const SVGDrawingParameters& aParams,
+ SVGDocumentWrapper* aSVGDocumentWrapper,
+ bool aContextPaint)
+ : AutoRestoreSVGState(aParams.svgContext, aParams.animationTime,
+ aSVGDocumentWrapper, aContextPaint) {}
+
+ AutoRestoreSVGState(const SVGImageContext& aSVGContext, float aAnimationTime,
+ SVGDocumentWrapper* aSVGDocumentWrapper,
+ bool aContextPaint)
+ : mIsDrawing(aSVGDocumentWrapper->mIsDrawing),
+ // Apply any 'preserveAspectRatio' override (if specified) to the root
+ // element:
+ mPAR(aSVGContext, aSVGDocumentWrapper->GetRootSVGElem()),
+ // Set the animation time:
+ mTime(aSVGDocumentWrapper->GetRootSVGElem(), aAnimationTime) {
+ MOZ_ASSERT(!mIsDrawing.SavedValue());
+ MOZ_ASSERT(aSVGDocumentWrapper->GetDocument());
+
+ if (auto* pc = aSVGDocumentWrapper->GetDocument()->GetPresContext()) {
+ pc->SetColorSchemeOverride([&] {
+ if (auto scheme = aSVGContext.GetColorScheme()) {
+ return *scheme == ColorScheme::Light
+ ? dom::PrefersColorSchemeOverride::Light
+ : dom::PrefersColorSchemeOverride::Dark;
+ }
+ return dom::PrefersColorSchemeOverride::None;
+ }());
+ }
+
+ aSVGDocumentWrapper->mIsDrawing = true;
+
+ // Set context paint (if specified) on the document:
+ if (aContextPaint) {
+ MOZ_ASSERT(aSVGContext.GetContextPaint());
+ mContextPaint.emplace(aSVGContext.GetContextPaint(),
+ aSVGDocumentWrapper->GetDocument());
+ }
+ }
+
+ private:
+ AutoRestore<bool> mIsDrawing;
+ AutoPreserveAspectRatioOverride mPAR;
+ AutoSVGTimeSetRestore mTime;
+ Maybe<AutoSetRestoreSVGContextPaint> mContextPaint;
+};
+
+} // namespace mozilla::image
+
+#endif // mozilla_image_AutoRestoreSVGState_h