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123 lines
3.6 KiB
C++
123 lines
3.6 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_DocAccessibleParent_h
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#define mozilla_a11y_DocAccessibleParent_h
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#include "nsAccessibilityService.h"
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#include "ProxyAccessible.h"
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#include "mozilla/a11y/PDocAccessibleParent.h"
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#include "nsClassHashtable.h"
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#include "nsHashKeys.h"
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#include "nsISupportsImpl.h"
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namespace mozilla {
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namespace a11y {
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/*
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* These objects live in the main process and comunicate with and represent
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* an accessible document in a content process.
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*/
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class DocAccessibleParent : public ProxyAccessible,
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public PDocAccessibleParent
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{
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public:
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DocAccessibleParent() :
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ProxyAccessible(this), mParentDoc(nullptr)
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{ MOZ_COUNT_CTOR_INHERITED(DocAccessibleParent, ProxyAccessible); }
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~DocAccessibleParent()
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{
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MOZ_COUNT_DTOR_INHERITED(DocAccessibleParent, ProxyAccessible);
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MOZ_ASSERT(mChildDocs.Length() == 0);
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MOZ_ASSERT(!mParentDoc);
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}
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/*
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* Called when a message from a document in a child process notifies the main
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* process it is firing an event.
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*/
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virtual bool RecvEvent(const uint64_t& aID, const uint32_t& aType)
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MOZ_OVERRIDE;
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virtual bool RecvShowEvent(const ShowEventData& aData) MOZ_OVERRIDE;
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virtual bool RecvHideEvent(const uint64_t& aRootID) MOZ_OVERRIDE;
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virtual void ActorDestroy(ActorDestroyReason aWhy) MOZ_OVERRIDE;
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/*
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* Return the main processes representation of the parent document (if any)
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* of the document this object represents.
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*/
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DocAccessibleParent* Parent() const { return mParentDoc; }
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/*
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* Called when a document in a content process notifies the main process of a
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* new child document.
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*/
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bool AddChildDoc(DocAccessibleParent* aChildDoc, uint64_t aParentID);
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/*
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* Called when the document in the content process this object represents
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* notifies the main process a child document has been removed.
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*/
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void RemoveChildDoc(DocAccessibleParent* aChildDoc)
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{
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aChildDoc->mParent->SetChildDoc(nullptr);
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mChildDocs.RemoveElement(aChildDoc);
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aChildDoc->mParentDoc = nullptr;
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MOZ_ASSERT(aChildDoc->mChildDocs.Length() == 0);
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}
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void RemoveAccessible(ProxyAccessible* aAccessible)
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{
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MOZ_ASSERT(mAccessibles.GetEntry(aAccessible->ID()));
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mAccessibles.RemoveEntry(aAccessible->ID());
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}
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private:
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class ProxyEntry : public PLDHashEntryHdr
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{
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public:
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explicit ProxyEntry(const void*) : mProxy(nullptr) {}
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ProxyEntry(ProxyEntry&& aOther) :
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mProxy(aOther.mProxy) { aOther.mProxy = nullptr; }
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~ProxyEntry() { delete mProxy; }
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typedef uint64_t KeyType;
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typedef const void* KeyTypePointer;
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bool KeyEquals(const void* aKey) const
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{ return mProxy->ID() == (uint64_t)aKey; }
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static const void* KeyToPointer(uint64_t aKey) { return (void*)aKey; }
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static PLDHashNumber HashKey(const void* aKey) { return (uint64_t)aKey; }
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enum { ALLOW_MEMMOVE = true };
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ProxyAccessible* mProxy;
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};
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uint32_t AddSubtree(ProxyAccessible* aParent,
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const nsTArray<AccessibleData>& aNewTree, uint32_t aIdx,
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uint32_t aIdxInParent);
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nsTArray<DocAccessibleParent*> mChildDocs;
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DocAccessibleParent* mParentDoc;
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/*
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* Conceptually this is a map from IDs to proxies, but we store the ID in the
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* proxy object so we can't use a real map.
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*/
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nsTHashtable<ProxyEntry> mAccessibles;
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};
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}
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}
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#endif
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