108 lines
3.7 KiB
C++
108 lines
3.7 KiB
C++
/*
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* Copyright (C) 2008-2020 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include "AccessibilityUIElement.h"
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#include <JavaScriptCore/JSObjectRef.h>
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#include <JavaScriptCore/JSRetainPtr.h>
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#include <string>
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#include <wtf/HashMap.h>
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#include <wtf/Platform.h>
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#if PLATFORM(WIN)
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#include <windows.h>
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#endif
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#if HAVE(ACCESSIBILITY) && PLATFORM(GTK)
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#include "AccessibilityNotificationHandlerAtk.h"
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#include <atk/atk.h>
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#endif
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class AccessibilityController {
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WTF_MAKE_FAST_ALLOCATED;
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public:
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AccessibilityController();
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~AccessibilityController();
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void makeWindowObject(JSContextRef);
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// Controller Methods - platform-independent implementations
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AccessibilityUIElement rootElement();
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AccessibilityUIElement focusedElement();
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AccessibilityUIElement elementAtPoint(int x, int y);
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AccessibilityUIElement accessibleElementById(JSStringRef id);
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void setLogFocusEvents(bool);
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void setLogValueChangeEvents(bool);
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void setLogScrollingStartEvents(bool);
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void setLogAccessibilityEvents(bool);
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void resetToConsistentState();
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// Global notification listener, captures notifications on any object.
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bool addNotificationListener(JSObjectRef functionCallback);
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void removeNotificationListener();
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// Enhanced accessibility.
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void enableEnhancedAccessibility(bool);
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bool enhancedAccessibilityEnabled();
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JSRetainPtr<JSStringRef> platformName() const;
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#if PLATFORM(WIN)
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// Helper methods so this class can add the listeners on behalf of AccessibilityUIElement.
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void winAddNotificationListener(PlatformUIElement, JSObjectRef functionCallback);
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void winNotificationReceived(PlatformUIElement, const std::string& eventName);
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#endif
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#if HAVE(ACCESSIBILITY) && PLATFORM(GTK)
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AtkObject* childElementById(AtkObject* parent, const char* id);
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#endif
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private:
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static JSRetainPtr<JSClassRef> createJSClass();
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#if PLATFORM(WIN)
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HWINEVENTHOOK m_focusEventHook { nullptr };
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HWINEVENTHOOK m_valueChangeEventHook { nullptr };
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HWINEVENTHOOK m_scrollingStartEventHook { nullptr };
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HWINEVENTHOOK m_allEventsHook { nullptr };
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HWINEVENTHOOK m_notificationsEventHook { nullptr };
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HashMap<PlatformUIElement, JSObjectRef> m_notificationListeners;
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#endif
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#if PLATFORM(COCOA)
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RetainPtr<id> m_globalNotificationHandler;
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#endif
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#if HAVE(ACCESSIBILITY) && PLATFORM(GTK)
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RefPtr<AccessibilityNotificationHandler> m_globalNotificationHandler;
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#endif
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void platformResetToConsistentState();
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};
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