accessible/windows/ProxyWrappers.h
author Kartikaya Gupta <kgupta@mozilla.com>
Fri, 24 May 2019 14:25:18 +0000
changeset 475381 00fe5cbd527fcf3d60ee5c5b98e18291835d2727
parent 448947 6f3709b3878117466168c40affa7bca0b60cf75b
child 476164 eed17a01f44fd2477e6acf2f9ff7d17c1a6a2c6b
permissions -rw-r--r--
Bug 1553593 - Allow the searchplugins stat call to happen later with WebRender. r=florian Differential Revision: https://phabricator.services.mozilla.com/D32471

/* -*- 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 "HyperTextAccessible.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);
  }

 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(mozilla::IsBaseOf<IUnknown, T>::value,
                "only IAccessible* should be passed in");
  auto wrapper = static_cast<HyperTextProxyAccessibleWrap*>(aWrapper);
  return wrapper->IsProxy() ? wrapper->Proxy() : nullptr;
}

}  // namespace a11y
}  // namespace mozilla

#endif