mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-23 12:51:06 +00:00
a9bc6f0257
We only need to cache the existance of a longdesc in an image. This increments the action count. Differential Revision: https://phabricator.services.mozilla.com/D135906
95 lines
2.8 KiB
C++
95 lines
2.8 KiB
C++
/* -*- 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 mozilla_a11y_ImageAccessible_h__
|
|
#define mozilla_a11y_ImageAccessible_h__
|
|
|
|
#include "BaseAccessibles.h"
|
|
#include "imgINotificationObserver.h"
|
|
|
|
namespace mozilla {
|
|
namespace a11y {
|
|
|
|
/* LocalAccessible for supporting images
|
|
* supports:
|
|
* - gets name, role
|
|
* - support basic state
|
|
*/
|
|
class ImageAccessible : public LinkableAccessible,
|
|
public imgINotificationObserver {
|
|
public:
|
|
ImageAccessible(nsIContent* aContent, DocAccessible* aDoc);
|
|
|
|
NS_DECL_ISUPPORTS_INHERITED
|
|
NS_DECL_IMGINOTIFICATIONOBSERVER
|
|
|
|
// LocalAccessible
|
|
virtual void Shutdown() override;
|
|
virtual a11y::role NativeRole() const override;
|
|
virtual uint64_t NativeState() const override;
|
|
virtual already_AddRefed<AccAttributes> NativeAttributes() override;
|
|
|
|
// ActionAccessible
|
|
virtual uint8_t ActionCount() const override;
|
|
virtual void ActionNameAt(uint8_t aIndex, nsAString& aName) override;
|
|
virtual bool DoAction(uint8_t aIndex) const override;
|
|
|
|
// ImageAccessible
|
|
LayoutDeviceIntPoint Position(uint32_t aCoordType);
|
|
LayoutDeviceIntSize Size();
|
|
|
|
/**
|
|
* Return whether the element has a longdesc URI.
|
|
*/
|
|
bool HasLongDesc() const {
|
|
nsCOMPtr<nsIURI> uri = GetLongDescURI();
|
|
return uri;
|
|
}
|
|
|
|
protected:
|
|
virtual ~ImageAccessible();
|
|
|
|
// LocalAccessible
|
|
virtual ENameValueFlag NativeName(nsString& aName) const override;
|
|
|
|
virtual void DOMAttributeChanged(int32_t aNameSpaceID, nsAtom* aAttribute,
|
|
int32_t aModType,
|
|
const nsAttrValue* aOldValue,
|
|
uint64_t aOldState) override;
|
|
|
|
private:
|
|
/**
|
|
* Return an URI for showlongdesc action if any.
|
|
*/
|
|
already_AddRefed<nsIURI> GetLongDescURI() const;
|
|
|
|
/**
|
|
* Used by ActionNameAt and DoAction to ensure the index for opening the
|
|
* longdesc URL is valid.
|
|
* It is always assumed that the highest possible index opens the longdesc.
|
|
* This doesn't check that there is actually a longdesc, just that the index
|
|
* would be correct if there was one.
|
|
*
|
|
* @param aIndex The 0-based index to be tested.
|
|
*
|
|
* @returns true if index is valid for longdesc action.
|
|
*/
|
|
inline bool IsLongDescIndex(uint8_t aIndex) const;
|
|
|
|
uint32_t mImageRequestStatus;
|
|
};
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
// LocalAccessible downcasting method
|
|
|
|
inline ImageAccessible* LocalAccessible::AsImage() {
|
|
return IsImage() ? static_cast<ImageAccessible*>(this) : nullptr;
|
|
}
|
|
|
|
} // namespace a11y
|
|
} // namespace mozilla
|
|
|
|
#endif
|