mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-10-30 21:55:31 +00:00
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 -*- */
|
|
/* 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/. */
|
|
|
|
#pragma once
|
|
|
|
#if defined(ACCESSIBILITY)
|
|
|
|
#include "nsCOMPtr.h"
|
|
#include "nsIObserver.h"
|
|
#include "nsIObserverService.h"
|
|
#include "nsServiceManagerUtils.h"
|
|
#include "mozilla/a11y/Accessible.h"
|
|
|
|
#include "mozwrlbase.h"
|
|
|
|
namespace mozilla {
|
|
namespace widget {
|
|
namespace winrt {
|
|
|
|
// Connects to our accessibility framework to receive
|
|
// events and query the dom.
|
|
class AccessibilityBridge : public nsIObserver
|
|
{
|
|
public:
|
|
NS_DECL_ISUPPORTS
|
|
NS_DECL_NSIOBSERVER
|
|
|
|
AccessibilityBridge() {}
|
|
|
|
~AccessibilityBridge() {
|
|
Disconnect();
|
|
}
|
|
|
|
bool Init(IUnknown* aBridge, mozilla::a11y::Accessible* aPtr) {
|
|
mAccess = aPtr;
|
|
mBridge = aBridge;
|
|
return Connect();
|
|
}
|
|
|
|
bool Connect() {
|
|
nsresult rv;
|
|
|
|
nsCOMPtr<nsIObserverService> observerService =
|
|
do_GetService("@mozilla.org/observer-service;1", &rv);
|
|
if (NS_FAILED(rv)) {
|
|
return false;
|
|
}
|
|
rv = observerService->AddObserver(this, "accessible-event", false);
|
|
if (NS_FAILED(rv)) {
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
bool Connected() {
|
|
return mAccess ? true : false;
|
|
}
|
|
|
|
void Disconnect() {
|
|
nsresult rv;
|
|
nsCOMPtr<nsIObserverService> observerService =
|
|
do_GetService("@mozilla.org/observer-service;1", &rv);
|
|
if (NS_FAILED(rv)) {
|
|
NS_WARNING("failed to get observersvc on shutdown.");
|
|
return;
|
|
}
|
|
observerService->RemoveObserver(this, "accessible-event");
|
|
mAccess = nullptr;
|
|
}
|
|
|
|
private:
|
|
nsRefPtr<mozilla::a11y::Accessible> mAccess;
|
|
Microsoft::WRL::ComPtr<IUnknown> mBridge;
|
|
};
|
|
|
|
} } }
|
|
|
|
#endif // ACCESSIBILITY
|