com.sun.glass.ui.Accessible Maven / Gradle / Ivy
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/*
* Copyright (c) 2014, 2021, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
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*/
package com.sun.glass.ui;
import static javafx.scene.AccessibleAttribute.PARENT;
import static javafx.scene.AccessibleAttribute.ROLE;
import java.security.AccessControlContext;
import java.security.AccessController;
import java.security.PrivilegedAction;
import com.sun.javafx.scene.NodeHelper;
import com.sun.javafx.scene.SceneHelper;
import com.sun.javafx.tk.quantum.QuantumToolkit;
import javafx.scene.AccessibleAction;
import javafx.scene.AccessibleAttribute;
import javafx.scene.AccessibleRole;
import javafx.scene.Node;
import javafx.scene.Scene;
public abstract class Accessible {
private EventHandler eventHandler;
private View view;
public static abstract class EventHandler {
public Object getAttribute(AccessibleAttribute attribute, Object... parameters) {
return null;
}
public void executeAction(AccessibleAction action, Object... parameters) {
}
@SuppressWarnings("removal")
public abstract AccessControlContext getAccessControlContext();
}
public EventHandler getEventHandler() {
return this.eventHandler;
}
public void setEventHandler(EventHandler eventHandler) {
this.eventHandler = eventHandler;
}
public void setView(View view) {
this.view = view;
}
public View getView() {
return view;
}
public void dispose() {
eventHandler = null;
view = null;
}
public boolean isDisposed() {
return getNativeAccessible() == 0L;
}
@Override
public String toString() {
return getClass().getSimpleName() + " (" + eventHandler + ")";
}
protected boolean isIgnored() {
AccessibleRole role = (AccessibleRole)getAttribute(ROLE);
if (role == null) return true;
return role == AccessibleRole.NODE || role == AccessibleRole.PARENT;
}
protected abstract long getNativeAccessible();
protected Accessible getAccessible(Scene scene) {
if (scene == null) return null;
return SceneHelper.getAccessible(scene);
}
protected Accessible getAccessible(Node node) {
if (node == null) return null;
return NodeHelper.getAccessible(node);
}
protected long getNativeAccessible(Node node) {
if (node == null) return 0L;
Accessible acc = getAccessible(node);
if (acc == null) return 0L;
return acc.getNativeAccessible();
}
protected Accessible getContainerAccessible(AccessibleRole targetRole) {
Node node = (Node)getAttribute(PARENT);
while (node != null) {
Accessible acc = getAccessible(node);
AccessibleRole role = (AccessibleRole)acc.getAttribute(ROLE);
if (role == targetRole) return acc;
node = (Node)acc.getAttribute(PARENT);
}
return null;
}
/*
* IMPORTANT: Calling to the user code should not proceed if
* this method returns NULL.
*/
@SuppressWarnings("removal")
private final AccessControlContext getAccessControlContext() {
AccessControlContext acc = null;
try {
acc = eventHandler.getAccessControlContext();
} catch (Exception e) {
/* The node was already removed from the scene */
}
return acc;
}
private class GetAttribute implements PrivilegedAction