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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 01:47:29 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 01:47:29 +0000 |
commit | 0ebf5bdf043a27fd3dfb7f92e0cb63d88954c44d (patch) | |
tree | a31f07c9bcca9d56ce61e9a1ffd30ef350d513aa /dom/svg/SVGMotionSMILPathUtils.h | |
parent | Initial commit. (diff) | |
download | firefox-esr-0ebf5bdf043a27fd3dfb7f92e0cb63d88954c44d.tar.xz firefox-esr-0ebf5bdf043a27fd3dfb7f92e0cb63d88954c44d.zip |
Adding upstream version 115.8.0esr.upstream/115.8.0esr
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'dom/svg/SVGMotionSMILPathUtils.h')
-rw-r--r-- | dom/svg/SVGMotionSMILPathUtils.h | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/dom/svg/SVGMotionSMILPathUtils.h b/dom/svg/SVGMotionSMILPathUtils.h new file mode 100644 index 0000000000..02b3389303 --- /dev/null +++ b/dom/svg/SVGMotionSMILPathUtils.h @@ -0,0 +1,104 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* 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/. */ + +/* Helper class to help with generating anonymous path elements for + <animateMotion> elements to use. */ + +#ifndef DOM_SVG_SVGMOTIONSMILPATHUTILS_H_ +#define DOM_SVG_SVGMOTIONSMILPATHUTILS_H_ + +#include "mozilla/Attributes.h" +#include "mozilla/RefPtr.h" +#include "mozilla/SMILParserUtils.h" +#include "mozilla/gfx/2D.h" +#include "gfxPlatform.h" +#include "nsDebug.h" +#include "nsStringFwd.h" +#include "nsTArray.h" + +namespace mozilla { + +namespace dom { +class SVGElement; +} + +class SVGMotionSMILPathUtils { + using DrawTarget = mozilla::gfx::DrawTarget; + using Path = mozilla::gfx::Path; + using PathBuilder = mozilla::gfx::PathBuilder; + + public: + // Class to assist in generating a Path, based on + // coordinates in the <animateMotion> from/by/to/values attributes. + class PathGenerator { + public: + explicit PathGenerator(const dom::SVGElement* aSVGElement) + : mSVGElement(aSVGElement), mHaveReceivedCommands(false) { + RefPtr<DrawTarget> drawTarget = + gfxPlatform::GetPlatform()->ScreenReferenceDrawTarget(); + NS_ASSERTION( + gfxPlatform::GetPlatform()->SupportsAzureContentForDrawTarget( + drawTarget), + "Should support Moz2D content drawing"); + + mPathBuilder = drawTarget->CreatePathBuilder(); + } + + // Methods for adding various path commands to output path. + // Note: aCoordPairStr is expected to be a whitespace and/or + // comma-separated x,y coordinate-pair -- see description of + // "the specified values for from, by, to, and values" at + // http://www.w3.org/TR/SVG11/animate.html#AnimateMotionElement + void MoveToOrigin(); + bool MoveToAbsolute(const nsAString& aCoordPairStr); + bool LineToAbsolute(const nsAString& aCoordPairStr, + double& aSegmentDistance); + bool LineToRelative(const nsAString& aCoordPairStr, + double& aSegmentDistance); + + // Accessor to let clients check if we've received any commands yet. + inline bool HaveReceivedCommands() { return mHaveReceivedCommands; } + // Accessor to get the finalized path + already_AddRefed<Path> GetResultingPath(); + + protected: + // Helper methods + bool ParseCoordinatePair(const nsAString& aCoordPairStr, float& aXVal, + float& aYVal); + + // Member data + const dom::SVGElement* mSVGElement; // context for converting to user units + RefPtr<PathBuilder> mPathBuilder; + bool mHaveReceivedCommands; + }; + + // Class to assist in passing each subcomponent of a |values| attribute to + // a PathGenerator, for generating a corresponding Path. + class MOZ_STACK_CLASS MotionValueParser + : public SMILParserUtils::GenericValueParser { + public: + MotionValueParser(PathGenerator* aPathGenerator, + FallibleTArray<double>* aPointDistances) + : mPathGenerator(aPathGenerator), + mPointDistances(aPointDistances), + mDistanceSoFar(0.0) { + MOZ_ASSERT(mPointDistances->IsEmpty(), + "expecting point distances array to start empty"); + } + + // SMILParserUtils::GenericValueParser interface + bool Parse(const nsAString& aValueStr) override; + + protected: + PathGenerator* mPathGenerator; + FallibleTArray<double>* mPointDistances; + double mDistanceSoFar; + }; +}; + +} // namespace mozilla + +#endif // DOM_SVG_SVGMOTIONSMILPATHUTILS_H_ |