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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 CssAltContent_h_
#define CssAltContent_h_
#include "nsStyleStruct.h"
namespace mozilla::a11y {
/**
* Queries alternative text specified in the CSS content property.
*/
class MOZ_STACK_CLASS CssAltContent {
public:
explicit CssAltContent(nsIContent* aContent);
/**
* Checks whether any CSS alt text has been specified. For example:
* if (CssAltContent(someContentNode)) ...
*/
explicit operator bool() const { return !mItems.IsEmpty(); }
/**
* Append all CSS alt text to a string.
*/
void AppendToString(nsAString& aOut);
/**
* Update accessibility if there is CSS alt content on the given element or a
* descendant pseudo-element which references the given attribute.
*/
static bool HandleAttributeChange(nsIContent* aContent, int32_t aNameSpaceID,
nsAtom* aAttribute);
private:
bool HandleAttributeChange(int32_t aNameSpaceID, nsAtom* aAttribute);
dom::Element* mRealElement = nullptr;
dom::Element* mPseudoElement = nullptr;
mozilla::Span<const mozilla::StyleContentItem> mItems;
};
} // namespace mozilla::a11y
#endif
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