| /* |
| * Copyright (C) 2011 Google Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following disclaimer |
| * in the documentation and/or other materials provided with the |
| * distribution. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #import "config.h" |
| #import "AccessibilityNotificationHandler.h" |
| |
| #import "AccessibilityCommonMac.h" |
| #import "AccessibilityUIElement.h" |
| #import "InjectedBundle.h" |
| #import "InjectedBundlePage.h" |
| #import "JSWrapper.h" |
| #import <JavaScriptCore/JSRetainPtr.h> |
| #import <JavaScriptCore/JSStringRef.h> |
| #import <JavaScriptCore/JSStringRefCF.h> |
| #import <WebKit/WKBundleFrame.h> |
| #import <wtf/RetainPtr.h> |
| |
| @interface NSObject (WebAccessibilityObjectWrapperAdditions) |
| + (void)accessibilitySetShouldRepostNotifications:(BOOL)repost; |
| @end |
| |
| @implementation AccessibilityNotificationHandler |
| |
| - (id)init |
| { |
| if (!(self = [super init])) |
| return nil; |
| |
| return self; |
| } |
| |
| - (void)setPlatformElement:(id)platformElement |
| { |
| m_platformElement = platformElement; |
| } |
| |
| - (void)dealloc |
| { |
| [self stopObserving]; |
| |
| WKBundleFrameRef mainFrame = WKBundlePageGetMainFrame(WTR::InjectedBundle::singleton().page()->page()); |
| JSContextRef context = WKBundleFrameGetJavaScriptContext(mainFrame); |
| |
| JSValueUnprotect(context, m_notificationFunctionCallback); |
| m_notificationFunctionCallback = 0; |
| |
| [super dealloc]; |
| } |
| |
| - (void)setCallback:(JSValueRef)callback |
| { |
| if (!callback) |
| return; |
| |
| WKBundleFrameRef mainFrame = WKBundlePageGetMainFrame(WTR::InjectedBundle::singleton().page()->page()); |
| JSContextRef context = WKBundleFrameGetJavaScriptContext(mainFrame); |
| |
| if (m_notificationFunctionCallback) |
| JSValueUnprotect(context, m_notificationFunctionCallback); |
| |
| m_notificationFunctionCallback = callback; |
| JSValueProtect(context, m_notificationFunctionCallback); |
| } |
| |
| - (void)startObserving |
| { |
| // Once we start requesting notifications, it's on for the duration of the program. |
| // This is to avoid any race conditions between tests turning this flag on and off. Instead |
| // AccessibilityNotificationHandler can ignore events it doesn't care about. |
| [WTR::webAccessibilityObjectWrapperClass() accessibilitySetShouldRepostNotifications:YES]; |
| [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(_notificationReceived:) name:@"AXDRTNotification" object:nil]; |
| } |
| |
| - (void)stopObserving |
| { |
| [[NSNotificationCenter defaultCenter] removeObserver:self]; |
| } |
| |
| - (void)_notificationReceived:(NSNotification *)notification |
| { |
| NSString *notificationName = [[notification userInfo] objectForKey:@"notificationName"]; |
| if (!notificationName) |
| return; |
| if (m_platformElement && m_platformElement != [notification object]) |
| return; |
| |
| NSDictionary *userInfo = [[notification userInfo] objectForKey:@"userInfo"]; |
| |
| WKBundleFrameRef mainFrame = WKBundlePageGetMainFrame(WTR::InjectedBundle::singleton().page()->page()); |
| JSContextRef context = WKBundleFrameGetJavaScriptContext(mainFrame); |
| |
| JSValueRef notificationNameArgument = JSValueMakeString(context, [notificationName createJSStringRef].get()); |
| JSValueRef userInfoArgument = WTR::makeValueRefForValue(context, userInfo); |
| if (m_platformElement) { |
| // Listener for one element gets the notification name and userInfo. |
| JSValueRef arguments[2]; |
| arguments[0] = notificationNameArgument; |
| arguments[1] = userInfoArgument; |
| JSObjectCallAsFunction(context, const_cast<JSObjectRef>(m_notificationFunctionCallback), 0, 2, arguments, 0); |
| } else { |
| // A global listener gets the element, notification name and userInfo. |
| JSValueRef arguments[3]; |
| id notificationObject = [notification object]; |
| arguments[0] = toJS(context, notificationObject ? WTR::AccessibilityUIElement::create(notificationObject).ptr() : nullptr); |
| arguments[1] = notificationNameArgument; |
| arguments[2] = userInfoArgument; |
| JSObjectCallAsFunction(context, const_cast<JSObjectRef>(m_notificationFunctionCallback), 0, 3, arguments, 0); |
| } |
| } |
| |
| @end |
| |