114 lines
3.5 KiB
C++
114 lines
3.5 KiB
C++
/* -*- Mode: C++; tab-width: 8; 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_dom_SVGTests_h
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#define mozilla_dom_SVGTests_h
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#include "nsStringFwd.h"
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#include "SVGStringList.h"
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#include "nsCOMPtr.h"
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class nsAttrValue;
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class nsIAtom;
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class nsString;
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namespace mozilla {
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class DOMSVGStringList;
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#define MOZILLA_DOMSVGTESTS_IID \
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{ 0x92370da8, 0xda28, 0x4895, \
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{0x9b, 0x1b, 0xe0, 0x06, 0x0d, 0xb7, 0x3f, 0xc3 } }
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namespace dom {
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class SVGTests : public nsISupports
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{
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public:
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NS_DECLARE_STATIC_IID_ACCESSOR(MOZILLA_DOMSVGTESTS_IID)
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SVGTests();
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friend class mozilla::DOMSVGStringList;
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typedef mozilla::SVGStringList SVGStringList;
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/**
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* Compare the language name(s) in a systemLanguage attribute to the
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* user's language preferences, as defined in
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* http://www.w3.org/TR/SVG11/struct.html#SystemLanguageAttribute
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* We have a match if a language name in the users language preferences
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* exactly equals one of the language names or exactly equals a prefix of
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* one of the language names in the systemLanguage attribute.
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* @returns 2 * the lowest index in the aAcceptLangs that matches + 1
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* if only the prefix matches, -2 if there's no systemLanguage attribute,
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* or -1 if no indices match.
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* XXX This algorithm is O(M*N).
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*/
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int32_t GetBestLanguagePreferenceRank(const nsSubstring& aAcceptLangs) const;
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/**
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* Special value to pass to PassesConditionalProcessingTests to ignore systemLanguage
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* attributes
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*/
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static const nsString * const kIgnoreSystemLanguage;
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/**
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* Check whether the conditional processing attributes requiredFeatures,
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* requiredExtensions and systemLanguage all "return true" if they apply to
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* and are specified on the given element. Returns true if this element
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* should be rendered, false if it should not.
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*
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* @param aAcceptLangs Optional parameter to pass in the value of the
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* intl.accept_languages preference if the caller has it cached.
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* Alternatively, pass in kIgnoreSystemLanguage to skip the systemLanguage
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* check if the caller is giving that special treatment.
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*/
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bool PassesConditionalProcessingTests(
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const nsString *aAcceptLangs = nullptr) const;
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/**
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* Returns true if the attribute is one of the conditional processing
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* attributes.
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*/
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bool IsConditionalProcessingAttribute(const nsIAtom* aAttribute) const;
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bool ParseConditionalProcessingAttribute(
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nsIAtom* aAttribute,
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const nsAString& aValue,
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nsAttrValue& aResult);
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/**
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* Unsets a conditional processing attribute.
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*/
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void UnsetAttr(const nsIAtom* aAttribute);
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nsIAtom* GetAttrName(uint8_t aAttrEnum) const;
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void GetAttrValue(uint8_t aAttrEnum, nsAttrValue &aValue) const;
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void MaybeInvalidate();
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// WebIDL
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already_AddRefed<DOMSVGStringList> RequiredFeatures();
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already_AddRefed<DOMSVGStringList> RequiredExtensions();
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already_AddRefed<DOMSVGStringList> SystemLanguage();
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bool HasExtension(const nsAString& aExtension);
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virtual bool IsInChromeDoc() const = 0;
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protected:
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virtual ~SVGTests() {}
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private:
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enum { FEATURES, EXTENSIONS, LANGUAGE };
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SVGStringList mStringListAttributes[3];
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static nsIAtom** sStringListNames[3];
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};
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NS_DEFINE_STATIC_IID_ACCESSOR(SVGTests, MOZILLA_DOMSVGTESTS_IID)
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} // namespace dom
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} // namespace mozilla
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#endif // mozilla_dom_SVGTests_h
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