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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 09:22:09 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 09:22:09 +0000
commit43a97878ce14b72f0981164f87f2e35e14151312 (patch)
tree620249daf56c0258faa40cbdcf9cfba06de2a846 /dom/svg/SVGMotionSMILPathUtils.h
parentInitial commit. (diff)
downloadfirefox-43a97878ce14b72f0981164f87f2e35e14151312.tar.xz
firefox-43a97878ce14b72f0981164f87f2e35e14151312.zip
Adding upstream version 110.0.1.upstream/110.0.1upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'dom/svg/SVGMotionSMILPathUtils.h')
-rw-r--r--dom/svg/SVGMotionSMILPathUtils.h104
1 files changed, 104 insertions, 0 deletions
diff --git a/dom/svg/SVGMotionSMILPathUtils.h b/dom/svg/SVGMotionSMILPathUtils.h
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+/* -*- 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_