Java example source code file (CAccessibility.java)
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* 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
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package sun.lwawt.macosx;
import java.awt.*;
import java.beans.*;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.util.*;
import java.util.concurrent.Callable;
import javax.accessibility.*;
import javax.swing.*;
class CAccessibility implements PropertyChangeListener {
private static Set<String> ignoredRoles;
static {
// Need to load the native library for this code.
java.security.AccessController.doPrivileged(
new java.security.PrivilegedAction<Void>() {
public Void run() {
System.loadLibrary("awt");
return null;
}
});
}
static CAccessibility sAccessibility;
static synchronized CAccessibility getAccessibility(final String[] roles) {
if (sAccessibility != null) return sAccessibility;
sAccessibility = new CAccessibility();
if (roles != null) {
ignoredRoles = new HashSet<String>(roles.length);
for (final String role : roles) ignoredRoles.add(role);
} else {
ignoredRoles = new HashSet<String>();
}
return sAccessibility;
}
private CAccessibility() {
KeyboardFocusManager.getCurrentKeyboardFocusManager().addPropertyChangeListener("focusOwner", this);
}
public void propertyChange(final PropertyChangeEvent evt) {
if (evt.getNewValue() == null) return;
focusChanged();
}
private native void focusChanged();
static <T> T invokeAndWait(final Callable callable, final Component c) {
try {
return LWCToolkit.invokeAndWait(callable, c);
} catch (final Exception e) { e.printStackTrace(); }
return null;
}
static void invokeLater(final Runnable runnable, final Component c) {
try {
LWCToolkit.invokeLater(runnable, c);
} catch (InvocationTargetException e) { e.printStackTrace(); }
}
public static String getAccessibleActionDescription(final AccessibleAction aa, final int index, final Component c) {
if (aa == null) return null;
return invokeAndWait(new Callable<String>() {
public String call() throws Exception {
return aa.getAccessibleActionDescription(index);
}
}, c);
}
public static void doAccessibleAction(final AccessibleAction aa, final int index, final Component c) {
// We make this an invokeLater because we don't need a reply.
if (aa == null) return;
invokeLater(new Runnable() {
public void run() {
aa.doAccessibleAction(index);
}
}, c);
}
public static Dimension getSize(final AccessibleComponent ac, final Component c) {
if (ac == null) return null;
return invokeAndWait(new Callable<Dimension>() {
public Dimension call() throws Exception {
return ac.getSize();
}
}, c);
}
public static AccessibleSelection getAccessibleSelection(final AccessibleContext ac, final Component c) {
if (ac == null) return null;
return invokeAndWait(new Callable<AccessibleSelection>() {
public AccessibleSelection call() throws Exception {
return ac.getAccessibleSelection();
}
}, c);
}
public static Accessible ax_getAccessibleSelection(final AccessibleContext ac, final int index, final Component c) {
if (ac == null) return null;
return invokeAndWait(new Callable<Accessible>() {
public Accessible call() throws Exception {
final AccessibleSelection as = ac.getAccessibleSelection();
if (as == null) return null;
return as.getAccessibleSelection(index);
}
}, c);
}
// KCH - can we make this a postEvent?
public static void addAccessibleSelection(final AccessibleContext ac, final int index, final Component c) {
if (ac == null) return;
invokeLater(new Runnable() {
public void run() {
final AccessibleSelection as = ac.getAccessibleSelection();
if (as == null) return;
as.addAccessibleSelection(index);
}
}, c);
}
public static AccessibleContext getAccessibleContext(final Accessible a, final Component c) {
if (a == null) return null;
return invokeAndWait(new Callable<AccessibleContext>() {
public AccessibleContext call() throws Exception {
return a.getAccessibleContext();
}
}, c);
}
public static boolean isAccessibleChildSelected(final Accessible a, final int index, final Component c) {
if (a == null) return false;
return invokeAndWait(new Callable<Boolean>() {
public Boolean call() throws Exception {
final AccessibleContext ac = a.getAccessibleContext();
if (ac == null) return Boolean.FALSE;
final AccessibleSelection as = ac.getAccessibleSelection();
if (as == null) return Boolean.FALSE;
return new Boolean(as.isAccessibleChildSelected(index));
}
}, c);
}
public static AccessibleStateSet getAccessibleStateSet(final AccessibleContext ac, final Component c) {
if (ac == null) return null;
return invokeAndWait(new Callable<AccessibleStateSet>() {
public AccessibleStateSet call() throws Exception {
return ac.getAccessibleStateSet();
}
}, c);
}
public static boolean contains(final AccessibleContext ac, final AccessibleState as, final Component c) {
if (ac == null || as == null) return false;
return invokeAndWait(new Callable<Boolean>() {
public Boolean call() throws Exception {
final AccessibleStateSet ass = ac.getAccessibleStateSet();
if (ass == null) return null;
return ass.contains(as);
}
}, c);
}
static Field getAccessibleBundleKeyFieldWithReflection() {
try {
final Field fieldKey = AccessibleBundle.class.getDeclaredField("key");
fieldKey.setAccessible(true);
return fieldKey;
} catch (final SecurityException e) {
e.printStackTrace();
} catch (final NoSuchFieldException e) {
e.printStackTrace();
}
return null;
}
private static final Field FIELD_KEY = getAccessibleBundleKeyFieldWithReflection();
static String getAccessibleRoleFor(final Accessible a) {
final AccessibleContext ac = a.getAccessibleContext();
if (ac == null) return null;
final AccessibleRole role = ac.getAccessibleRole();
try {
return (String)FIELD_KEY.get(role);
} catch (final IllegalArgumentException e) {
e.printStackTrace();
} catch (final IllegalAccessException e) {
e.printStackTrace();
}
return null;
}
public static String getAccessibleRole(final Accessible a, final Component c) {
if (a == null) return null;
return invokeAndWait(new Callable<String>() {
public String call() throws Exception {
final Accessible sa = CAccessible.getSwingAccessible(a);
final String role = getAccessibleRoleFor(a);
if (!"text".equals(role)) return role;
if (sa instanceof JTextArea || sa instanceof JEditorPane) {
return "textarea";
}
return role;
}
}, c);
}
public static Point getLocationOnScreen(final AccessibleComponent ac, final Component c) {
if (ac == null) return null;
return invokeAndWait(new Callable<Point>() {
public Point call() throws Exception {
return ac.getLocationOnScreen();
}
}, c);
}
public static int getCharCount(final AccessibleText at, final Component c) {
if (at == null) return 0;
return invokeAndWait(new Callable<Integer>() {
public Integer call() throws Exception {
return at.getCharCount();
}
}, c);
}
// Accessibility Threadsafety for JavaComponentAccessibility.m
public static Accessible getAccessibleParent(final Accessible a, final Component c) {
if (a == null) return null;
return invokeAndWait(new Callable<Accessible>() {
public Accessible call() throws Exception {
final AccessibleContext ac = a.getAccessibleContext();
if (ac == null) return null;
return ac.getAccessibleParent();
}
}, c);
}
public static int getAccessibleIndexInParent(final Accessible a, final Component c) {
if (a == null) return 0;
return invokeAndWait(new Callable<Integer>() {
public Integer call() throws Exception {
final AccessibleContext ac = a.getAccessibleContext();
if (ac == null) return null;
return ac.getAccessibleIndexInParent();
}
}, c);
}
public static AccessibleComponent getAccessibleComponent(final Accessible a, final Component c) {
if (a == null) return null;
return invokeAndWait(new Callable<AccessibleComponent>() {
public AccessibleComponent call() throws Exception {
final AccessibleContext ac = a.getAccessibleContext();
if (ac == null) return null;
return ac.getAccessibleComponent();
}
}, c);
}
public static AccessibleValue getAccessibleValue(final Accessible a, final Component c) {
if (a == null) return null;
return invokeAndWait(new Callable<AccessibleValue>() {
public AccessibleValue call() throws Exception {
final AccessibleContext ac = a.getAccessibleContext();
if (ac == null) return null;
AccessibleValue accessibleValue = ac.getAccessibleValue();
return accessibleValue;
}
}, c);
}
public static String getAccessibleName(final Accessible a, final Component c) {
if (a == null) return null;
return invokeAndWait(new Callable<String>() {
public String call() throws Exception {
final AccessibleContext ac = a.getAccessibleContext();
if (ac == null) return null;
final String accessibleName = ac.getAccessibleName();
if (accessibleName == null) {
return ac.getAccessibleDescription();
}
return accessibleName;
}
}, c);
}
public static AccessibleText getAccessibleText(final Accessible a, final Component c) {
if (a == null) return null;
return invokeAndWait(new Callable<AccessibleText>() {
public AccessibleText call() throws Exception {
final AccessibleContext ac = a.getAccessibleContext();
if (ac == null) return null;
AccessibleText accessibleText = ac.getAccessibleText();
return accessibleText;
}
}, c);
}
public static String getAccessibleDescription(final Accessible a, final Component c) {
if (a == null) return null;
return invokeAndWait(new Callable<String>() {
public String call() throws Exception {
final AccessibleContext ac = a.getAccessibleContext();
if (ac == null) return null;
final String accessibleDescription = ac.getAccessibleDescription();
if (accessibleDescription == null) {
if (c instanceof JComponent) {
String toolTipText = ((JComponent)c).getToolTipText();
if (toolTipText != null) {
return toolTipText;
}
}
}
return accessibleDescription;
}
}, c);
}
public static boolean isFocusTraversable(final Accessible a, final Component c) {
if (a == null) return false;
return invokeAndWait(new Callable<Boolean>() {
public Boolean call() throws Exception {
final AccessibleContext ac = a.getAccessibleContext();
if (ac == null) return null;
final AccessibleComponent aComp = ac.getAccessibleComponent();
if (aComp == null) return null;
return aComp.isFocusTraversable();
}
}, c);
}
public static Accessible accessibilityHitTest(final Container parent, final float hitPointX, final float hitPointY) {
return invokeAndWait(new Callable<Accessible>() {
public Accessible call() throws Exception {
final Point p = parent.getLocationOnScreen();
// Make it into local coords
final Point localPoint = new Point((int)(hitPointX - p.getX()), (int)(hitPointY - p.getY()));
final Component component = parent.findComponentAt(localPoint);
if (component == null) return null;
final AccessibleContext axContext = component.getAccessibleContext();
if (axContext == null) return null;
final AccessibleComponent axComponent = axContext.getAccessibleComponent();
if (axComponent == null) return null;
final int numChildren = axContext.getAccessibleChildrenCount();
if (numChildren > 0) {
// It has children, check to see which one is hit.
final Point p2 = axComponent.getLocationOnScreen();
final Point localP2 = new Point((int)(hitPointX - p2.getX()), (int)(hitPointY - p2.getY()));
return CAccessible.getCAccessible(axComponent.getAccessibleAt(localP2));
}
if (!(component instanceof Accessible)) return null;
return CAccessible.getCAccessible((Accessible)component);
}
}, parent);
}
public static AccessibleAction getAccessibleAction(final Accessible a, final Component c) {
return invokeAndWait(new Callable<AccessibleAction>() {
public AccessibleAction call() throws Exception {
final AccessibleContext ac = a.getAccessibleContext();
if (ac == null) return null;
return ac.getAccessibleAction();
}
}, c);
}
public static boolean isEnabled(final Accessible a, final Component c) {
if (a == null) return false;
return invokeAndWait(new Callable<Boolean>() {
public Boolean call() throws Exception {
final AccessibleContext ac = a.getAccessibleContext();
if (ac == null) return null;
final AccessibleComponent aComp = ac.getAccessibleComponent();
if (aComp == null) return null;
return aComp.isEnabled();
}
}, c);
}
// KCH - can we make this a postEvent instead?
public static void requestFocus(final Accessible a, final Component c) {
if (a == null) return;
invokeLater(new Runnable() {
public void run() {
final AccessibleContext ac = a.getAccessibleContext();
if (ac == null) return;
final AccessibleComponent aComp = ac.getAccessibleComponent();
if (aComp == null) return;
aComp.requestFocus();
}
}, c);
}
public static Number getMaximumAccessibleValue(final Accessible a, final Component c) {
if (a == null) return null;
return invokeAndWait(new Callable<Number>() {
public Number call() throws Exception {
final AccessibleContext ac = a.getAccessibleContext();
if (ac == null) return null;
final AccessibleValue av = ac.getAccessibleValue();
if (av == null) return null;
return av.getMaximumAccessibleValue();
}
}, c);
}
public static Number getMinimumAccessibleValue(final Accessible a, final Component c) {
if (a == null) return null;
return invokeAndWait(new Callable<Number>() {
public Number call() throws Exception {
final AccessibleContext ac = a.getAccessibleContext();
if (ac == null) return null;
final AccessibleValue av = ac.getAccessibleValue();
if (av == null) return null;
return av.getMinimumAccessibleValue();
}
}, c);
}
public static String getAccessibleRoleDisplayString(final Accessible a, final Component c) {
if (a == null) return null;
return invokeAndWait(new Callable<String>() {
public String call() throws Exception {
final AccessibleContext ac = a.getAccessibleContext();
if (ac == null) return null;
final AccessibleRole ar = ac.getAccessibleRole();
if (ar == null) return null;
return ar.toDisplayString();
}
}, c);
}
public static Number getCurrentAccessibleValue(final AccessibleValue av, final Component c) {
if (av == null) return null;
return invokeAndWait(new Callable<Number>() {
public Number call() throws Exception {
Number currentAccessibleValue = av.getCurrentAccessibleValue();
return currentAccessibleValue;
}
}, c);
}
public static Accessible getFocusOwner(final Component c) {
return invokeAndWait(new Callable<Accessible>() {
public Accessible call() throws Exception {
Component c = KeyboardFocusManager.getCurrentKeyboardFocusManager().getFocusOwner();
if (c == null || !(c instanceof Accessible)) return null;
return CAccessible.getCAccessible((Accessible)c);
}
}, c);
}
public static boolean[] getInitialAttributeStates(final Accessible a, final Component c) {
final boolean[] ret = new boolean[7];
if (a == null) return ret;
return invokeAndWait(new Callable<boolean[]>() {
public boolean[] call() throws Exception {
final AccessibleContext aContext = a.getAccessibleContext();
if (aContext == null) return ret;
final AccessibleComponent aComponent = aContext.getAccessibleComponent();
ret[0] = (aComponent != null);
ret[1] = ((aComponent != null) && (aComponent.isFocusTraversable()));
ret[2] = (aContext.getAccessibleValue() != null);
ret[3] = (aContext.getAccessibleText() != null);
final AccessibleStateSet aStateSet = aContext.getAccessibleStateSet();
ret[4] = (aStateSet.contains(AccessibleState.HORIZONTAL) || aStateSet.contains(AccessibleState.VERTICAL));
ret[5] = (aContext.getAccessibleName() != null);
ret[6] = (aContext.getAccessibleChildrenCount() > 0);
return ret;
}
}, c);
}
// Duplicated from JavaComponentAccessibility
// Note that values >=0 are indexes into the child array
final static int JAVA_AX_ALL_CHILDREN = -1;
final static int JAVA_AX_SELECTED_CHILDREN = -2;
final static int JAVA_AX_VISIBLE_CHILDREN = -3;
// Each child takes up two entries in the array: one for itself and one for its role
public static Object[] getChildrenAndRoles(final Accessible a, final Component c, final int whichChildren, final boolean allowIgnored) {
if (a == null) return null;
return invokeAndWait(new Callable<Object[]>() {
public Object[] call() throws Exception {
final ArrayList<Object> childrenAndRoles = new ArrayList
