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https://gitlab.winehq.org/wine/wine-gecko.git
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81 lines
1.8 KiB
C++
81 lines
1.8 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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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#pragma once
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#if defined(ACCESSIBILITY)
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#include "nsCOMPtr.h"
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#include "nsIObserver.h"
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#include "nsIObserverService.h"
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#include "nsServiceManagerUtils.h"
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#include "mozilla/a11y/Accessible.h"
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#include "mozwrlbase.h"
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namespace mozilla {
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namespace widget {
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namespace winrt {
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// Connects to our accessibility framework to receive
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// events and query the dom.
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class AccessibilityBridge : public nsIObserver
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{
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public:
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NS_DECL_ISUPPORTS
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NS_DECL_NSIOBSERVER
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AccessibilityBridge() {}
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~AccessibilityBridge() {
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Disconnect();
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}
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bool Init(IUnknown* aBridge, mozilla::a11y::Accessible* aPtr) {
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mAccess = aPtr;
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mBridge = aBridge;
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return Connect();
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}
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bool Connect() {
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nsresult rv;
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nsCOMPtr<nsIObserverService> observerService =
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do_GetService("@mozilla.org/observer-service;1", &rv);
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if (NS_FAILED(rv)) {
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return false;
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}
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rv = observerService->AddObserver(this, "accessible-event", false);
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if (NS_FAILED(rv)) {
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return false;
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}
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return true;
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}
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bool Connected() {
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return mAccess ? true : false;
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}
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void Disconnect() {
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nsresult rv;
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nsCOMPtr<nsIObserverService> observerService =
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do_GetService("@mozilla.org/observer-service;1", &rv);
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if (NS_FAILED(rv)) {
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NS_WARNING("failed to get observersvc on shutdown.");
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return;
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}
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observerService->RemoveObserver(this, "accessible-event");
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mAccess = nullptr;
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}
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private:
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nsRefPtr<mozilla::a11y::Accessible> mAccess;
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Microsoft::WRL::ComPtr<IUnknown> mBridge;
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};
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} } }
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#endif // ACCESSIBILITY
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