зеркало из https://github.com/mozilla/gecko-dev.git
60 строки
2.0 KiB
C++
60 строки
2.0 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef MOZILLA_SVGFRAGMENTIDENTIFIER_H__
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#define MOZILLA_SVGFRAGMENTIDENTIFIER_H__
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#include "nsString.h"
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class nsIDocument;
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namespace mozilla {
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namespace dom {
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class SVGSVGElement;
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}
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/**
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* Implements support for parsing SVG fragment identifiers
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* http://www.w3.org/TR/SVG/linking.html#SVGFragmentIdentifiers
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*/
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class SVGFragmentIdentifier
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{
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// To prevent the class being instantiated
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SVGFragmentIdentifier() = delete;
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public:
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/**
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* Process the SVG fragment identifier, if there is one.
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* @return true if we found a valid svgView()-style fragment identifier,
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* in which case further processing by the caller can stop. Otherwise return
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* false as we may have an ordinary anchor which needs to be :target matched.
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*/
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static bool ProcessFragmentIdentifier(nsIDocument *aDocument,
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const nsAString &aAnchorName);
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private:
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/**
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* Parse an SVG ViewSpec and set applicable attributes on the root element.
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* @return true if there is a valid ViewSpec
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*/
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static bool ProcessSVGViewSpec(const nsAString &aViewSpec, dom::SVGSVGElement *root);
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// Save and restore things we override in case we want to go back e.g. the
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// user presses the back button
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static void SaveOldPreserveAspectRatio(dom::SVGSVGElement *root);
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static void RestoreOldPreserveAspectRatio(dom::SVGSVGElement *root);
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static void SaveOldViewBox(dom::SVGSVGElement *root);
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static void RestoreOldViewBox(dom::SVGSVGElement *root);
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static void SaveOldZoomAndPan(dom::SVGSVGElement *root);
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static void RestoreOldZoomAndPan(dom::SVGSVGElement *root);
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static void SaveOldTransform(dom::SVGSVGElement *root);
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static void RestoreOldTransform(dom::SVGSVGElement *root);
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};
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} // namespace mozilla
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#endif // MOZILLA_SVGFRAGMENTIDENTIFIER_H__
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