1/* 2 * Copyright (c) 2021, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26#import "ScrollAreaAccessibility.h" 27#import "ThreadUtilities.h" 28#import "JNIUtilities.h" 29 30/* 31 * Implementation of the accessibility peer for the ScrollArea role 32 */ 33@implementation ScrollAreaAccessibility 34 35- (NSArray * _Nullable)accessibilityContentsAttribute 36{ 37 JNIEnv *env = [ThreadUtilities getJNIEnv]; 38 NSArray *children = [JavaComponentAccessibility childrenOfParent:self withEnv:env withChildrenCode:JAVA_AX_ALL_CHILDREN allowIgnored:YES]; 39 40 if ([children count] <= 0) return nil; 41 NSArray *contents = [NSMutableArray arrayWithCapacity:[children count]]; 42 43 // The scroll bars are in the children. children less the scroll bars is the contents 44 NSEnumerator *enumerator = [children objectEnumerator]; 45 JavaComponentAccessibility *aElement; 46 while ((aElement = (JavaComponentAccessibility *)[enumerator nextObject])) { 47 if (![[aElement accessibilityRoleAttribute] isEqualToString:NSAccessibilityScrollBarRole]) { 48 // no scroll bars in contents 49 [(NSMutableArray *)contents addObject:aElement]; 50 } 51 } 52 return contents; 53} 54 55- (id _Nullable)getScrollBarwithOrientation:(enum NSAccessibilityOrientation)orientation 56{ 57 JNIEnv *env = [ThreadUtilities getJNIEnv]; 58 59 NSArray *children = [JavaComponentAccessibility childrenOfParent:self withEnv:env withChildrenCode:JAVA_AX_ALL_CHILDREN allowIgnored:YES]; 60 if ([children count] <= 0) return nil; 61 62 // The scroll bars are in the children. 63 JavaComponentAccessibility *aElement; 64 NSEnumerator *enumerator = [children objectEnumerator]; 65 while ((aElement = (JavaComponentAccessibility *)[enumerator nextObject])) { 66 if ([[aElement accessibilityRoleAttribute] isEqualToString:NSAccessibilityScrollBarRole]) { 67 jobject elementAxContext = [aElement axContextWithEnv:env]; 68 if (orientation == NSAccessibilityOrientationHorizontal) { 69 if (isHorizontal(env, elementAxContext, fComponent)) { 70 (*env)->DeleteLocalRef(env, elementAxContext); 71 return aElement; 72 } 73 } else if (orientation == NSAccessibilityOrientationVertical) { 74 if (isVertical(env, elementAxContext, fComponent)) { 75 (*env)->DeleteLocalRef(env, elementAxContext); 76 return aElement; 77 } 78 } else { 79 (*env)->DeleteLocalRef(env, elementAxContext); 80 } 81 } 82 } 83 return nil; 84} 85 86- (NSAccessibilityRole _Nonnull)accessibilityRole 87{ 88 return NSAccessibilityScrollAreaRole; 89} 90 91- (NSArray * _Nullable)accessibilityContents 92{ 93 return [self accessibilityContentsAttribute]; 94} 95 96- (id _Nullable)accessibilityHorizontalScrollBar 97{ 98 return [self getScrollBarwithOrientation:NSAccessibilityOrientationHorizontal]; 99} 100 101- (id _Nullable)accessibilityVerticalScrollBar 102{ 103 return [self getScrollBarwithOrientation:NSAccessibilityOrientationVertical]; 104} 105@end 106