1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/widget/windows/winrt/UIAAccessibilityBridge.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,80 @@
1.4 +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#pragma once
1.10 +
1.11 +#if defined(ACCESSIBILITY)
1.12 +
1.13 +#include "nsCOMPtr.h"
1.14 +#include "nsIObserver.h"
1.15 +#include "nsIObserverService.h"
1.16 +#include "nsServiceManagerUtils.h"
1.17 +#include "mozilla/a11y/Accessible.h"
1.18 +
1.19 +#include "mozwrlbase.h"
1.20 +
1.21 +namespace mozilla {
1.22 +namespace widget {
1.23 +namespace winrt {
1.24 +
1.25 +// Connects to our accessibility framework to receive
1.26 +// events and query the dom.
1.27 +class AccessibilityBridge : public nsIObserver
1.28 +{
1.29 +public:
1.30 + NS_DECL_ISUPPORTS
1.31 + NS_DECL_NSIOBSERVER
1.32 +
1.33 + AccessibilityBridge() {}
1.34 +
1.35 + ~AccessibilityBridge() {
1.36 + Disconnect();
1.37 + }
1.38 +
1.39 + bool Init(IUnknown* aBridge, mozilla::a11y::Accessible* aPtr) {
1.40 + mAccess = aPtr;
1.41 + mBridge = aBridge;
1.42 + return Connect();
1.43 + }
1.44 +
1.45 + bool Connect() {
1.46 + nsresult rv;
1.47 +
1.48 + nsCOMPtr<nsIObserverService> observerService =
1.49 + do_GetService("@mozilla.org/observer-service;1", &rv);
1.50 + if (NS_FAILED(rv)) {
1.51 + return false;
1.52 + }
1.53 + rv = observerService->AddObserver(this, "accessible-event", false);
1.54 + if (NS_FAILED(rv)) {
1.55 + return false;
1.56 + }
1.57 + return true;
1.58 + }
1.59 +
1.60 + bool Connected() {
1.61 + return mAccess ? true : false;
1.62 + }
1.63 +
1.64 + void Disconnect() {
1.65 + nsresult rv;
1.66 + nsCOMPtr<nsIObserverService> observerService =
1.67 + do_GetService("@mozilla.org/observer-service;1", &rv);
1.68 + if (NS_FAILED(rv)) {
1.69 + NS_WARNING("failed to get observersvc on shutdown.");
1.70 + return;
1.71 + }
1.72 + observerService->RemoveObserver(this, "accessible-event");
1.73 + mAccess = nullptr;
1.74 + }
1.75 +
1.76 +private:
1.77 + nsRefPtr<mozilla::a11y::Accessible> mAccess;
1.78 + Microsoft::WRL::ComPtr<IUnknown> mBridge;
1.79 +};
1.80 +
1.81 +} } }
1.82 +
1.83 +#endif // ACCESSIBILITY
