/*

     File: SKTHandleUIElement.m

 Abstract: Concrete implementation of a element object for accessibility.

  Version: 1.1

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 */

#import "SKTHandleUIElement.h"

#import "SKTGraphicAccessibilityProxy.h"

@implementation SKTHandleUIElement

- (id)initWithHandleCode:(NSInteger)code parent:(id)aParent {

    self = [super initWithRole:NSAccessibilityHandleRole parent:aParent];

    if (self) {

    handleCode = code;

    }

    return self;

}

+ (SKTHandleUIElement *)graphicHandleWithCode:(NSInteger)code parent:(id)aParent {

    return [[[SKTHandleUIElement alloc] initWithHandleCode:code parent:aParent] autorelease];

}

- (NSInteger)handleCode {

    return handleCode;

}

#pragma mark -

#pragma mark Attributes

- (NSArray *)accessibilityAttributeNames {

    NSMutableArray *names = [[[super accessibilityAttributeNames] mutableCopy] autorelease];

    [names addObject:NSAccessibilityEnabledAttribute];

    [names addObject:NSAccessibilityDescriptionAttribute];

    return names;

}

- (id)accessibilityAttributeValue:(NSString *)attribute {

    if ([attribute isEqualToString:NSAccessibilityDescriptionAttribute]) {

    // Ask our parent for the right description

    return [parent descriptionForHandleCode:[self handleCode]];

    } else if ([attribute isEqualToString:NSAccessibilityEnabledAttribute]) {

    // A handle is always enabled in Sketch

    return [NSNumber numberWithBool:YES];

    } else {

    return [super accessibilityAttributeValue:attribute];

    }

}

- (BOOL)accessibilityIsAttributeSettable:(NSString *)attribute {

    if ([attribute isEqualToString:NSAccessibilityPositionAttribute]) {

    return YES;

    } else {

    return [super accessibilityIsAttributeSettable:attribute];

    }

}

- (void)accessibilitySetValue:(id)value forAttribute:(NSString *)attribute {

    if ([attribute isEqualToString:NSAccessibilityPositionAttribute]) {

    if ([value isKindOfClass:[NSValue class]]) {

        NSPoint screenPoint = [value pointValue];

        [parent setPosition:screenPoint forHandleUIElement:self];

    } else {

        NSAccessibilityRaiseBadArgumentException(self, attribute, value);

    }

    } else {

    [super accessibilitySetValue:value forAttribute:attribute];

    }

}

#pragma mark -

#pragma mark NSObject overridden methods

- (BOOL)isEqual:(id)object {

    if ([object isKindOfClass:[SKTHandleUIElement self]]) {

        SKTHandleUIElement *other = object;

        return (handleCode == other->handleCode) && [super isEqual:object];

    } else {

        return NO;

    }

}

- (NSUInteger)hash {

    // Equal objects must hash the same.

    return [super hash] + handleCode;

}

- (NSString *)description {

    return [NSString stringWithFormat:@"%@ Handle Code: %ld", [super description], (long)handleCode];

}

@end