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fed60784c3
We need to implement things like https://developer.gnome.org/atk/unstable/AtkObject.html#atk-object-ref-state-set and the same basic thing on windows. That API is fundamentally sync, but the information necessary to implement it is only available in the child process. That seems to leave us with two options, either we can use sync ipc or we can use async ipc but spin a nested event loop. If we were to spin nested event loops we'd have to be careful to make sure a11y didn't do anything until the nested event loop was done, and then a11y would have to deal with whatever changed. I'm not sure that will work, and since the system is probably waiting for the accessibility information anyway I don't think we get much out of spinning the event loop. So I think its somewhat less bad to use sync ipc here.
49 lines
1.2 KiB
C++
49 lines
1.2 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=2 et sw=2 tw=80: */
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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_a11y_DocAccessibleChild_h
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#define mozilla_a11y_DocAccessibleChild_h
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#include "mozilla/a11y/DocAccessible.h"
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#include "mozilla/a11y/PDocAccessibleChild.h"
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#include "nsISupportsImpl.h"
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namespace mozilla {
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namespace a11y {
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class AccShowEvent;
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/*
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* These objects handle content side communication for an accessible document,
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* and their lifetime is the same as the document they represent.
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*/
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class DocAccessibleChild : public PDocAccessibleChild
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{
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public:
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DocAccessibleChild(DocAccessible* aDoc) :
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mDoc(aDoc)
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{ MOZ_COUNT_CTOR(DocAccessibleChild); }
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~DocAccessibleChild()
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{
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mDoc->SetIPCDoc(nullptr);
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MOZ_COUNT_DTOR(DocAccessibleChild);
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}
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void ShowEvent(AccShowEvent* aShowEvent);
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/*
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* Return the state for the accessible with given ID.
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*/
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virtual bool RecvState(const uint64_t& aID, uint64_t* aState) MOZ_OVERRIDE;
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private:
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DocAccessible* mDoc;
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};
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}
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}
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#endif
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