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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 et sw=2 tw=80: */
/* 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_ProxyWrappers_h
#define MOZILLA_A11Y_ProxyWrappers_h
#include "HyperTextAccessibleWrap.h"
namespace mozilla {
namespace a11y {
class ProxyAccessibleWrap : public AccessibleWrap {
public:
explicit ProxyAccessibleWrap(ProxyAccessible* aProxy)
: AccessibleWrap(nullptr, nullptr) {
mType = eProxyType;
mBits.proxy = aProxy;
}
virtual void Shutdown() override {
mBits.proxy = nullptr;
mStateFlags |= eIsDefunct;
}
virtual void GetNativeInterface(void** aOutAccessible) override {
mBits.proxy->GetCOMInterface(aOutAccessible);
}
};
class HyperTextProxyAccessibleWrap : public HyperTextAccessibleWrap {
public:
explicit HyperTextProxyAccessibleWrap(ProxyAccessible* aProxy)
: HyperTextAccessibleWrap(nullptr, nullptr) {
mType = eProxyType;
mBits.proxy = aProxy;
}
virtual void Shutdown() override {
mBits.proxy = nullptr;
mStateFlags |= eIsDefunct;
}
virtual void GetNativeInterface(void** aOutAccessible) override {
mBits.proxy->GetCOMInterface(aOutAccessible);
}
};
class DocProxyAccessibleWrap : public HyperTextProxyAccessibleWrap {
public:
explicit DocProxyAccessibleWrap(ProxyAccessible* aProxy)
: HyperTextProxyAccessibleWrap(aProxy) {
mGenericTypes |= eDocument;
}
void AddID(uint32_t aID, AccessibleWrap* aAcc) {
mIDToAccessibleMap.Put(aID, aAcc);
}
void RemoveID(uint32_t aID) { mIDToAccessibleMap.Remove(aID); }
AccessibleWrap* GetAccessibleByID(uint32_t aID) const {
return mIDToAccessibleMap.Get(aID);
}
virtual nsIntRect Bounds() const override {
// OuterDocAccessible can return a DocProxyAccessibleWrap as a child.
// Accessible::ChildAtPoint on an ancestor might retrieve this proxy and
// call Bounds() on it. This will crash on a proxy, so we override it to do
// nothing here.
return nsIntRect();
}
private:
/*
* This provides a mapping from 32 bit id to accessible objects.
*/
nsDataHashtable<nsUint32HashKey, AccessibleWrap*> mIDToAccessibleMap;
};
template <typename T>
inline ProxyAccessible* HyperTextProxyFor(T* aWrapper) {
static_assert(std::is_base_of<IUnknown, T>::value,
"only IAccessible* should be passed in");
auto wrapper = static_cast<HyperTextProxyAccessibleWrap*>(aWrapper);
return wrapper->IsProxy() ? wrapper->Proxy() : nullptr;
}
/**
* Stub AccessibleWrap used in a content process for an embedded document
* residing in another content process.
* There is no ProxyAccessible here, since those only exist in the parent
* process. However, like ProxyAccessibleWrap, the only real method that
* gets called is GetNativeInterface, which returns a COM proxy for the
* document.
*/
class RemoteIframeDocProxyAccessibleWrap : public HyperTextAccessibleWrap {
public:
explicit RemoteIframeDocProxyAccessibleWrap(IDispatch* aCOMProxy)
: HyperTextAccessibleWrap(nullptr, nullptr), mCOMProxy(aCOMProxy) {
mType = eProxyType;
mBits.proxy = nullptr;
}
virtual void Shutdown() override {
mStateFlags |= eIsDefunct;
mCOMProxy = nullptr;
}
virtual void GetNativeInterface(void** aOutAccessible) override {
RefPtr<IDispatch> addRefed = mCOMProxy;
addRefed.forget(aOutAccessible);
}
virtual nsIntRect Bounds() const override {
// OuterDocAccessible can return a RemoteIframeDocProxyAccessibleWrap as a
// child. Accessible::ChildAtPoint on an ancestor might retrieve this proxy
// and call Bounds() on it. This will crash on a proxy, so we override it
// to do nothing here.
return nsIntRect();
}
private:
RefPtr<IDispatch> mCOMProxy;
};
} // namespace a11y
} // namespace mozilla
#endif
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