//
//  MPRootFunctionLayout.m
//  MathPad
//
//  Created by Kim Wittenburg on 22.10.14.
//  Copyright (c) 2014 Kim Wittenburg. All rights reserved.
//

#import "MPRootFunctionLayout.h"

#import "MPRootFunction.h"

#define kRootFunctionSpaceBetweenRadicantAndExponent 5

@implementation MPRootFunctionLayout

- (MPRootFunction *)rootFunction
{
    return (MPRootFunction *)self.function;
}

- (NSUInteger)indexOfLeadingChild
{
    return 0;
}

- (NSUInteger)indexOfTrailingChild
{
    return 1;
}

- (NSUInteger)indexOfChildAfterChildAtIndex:(NSUInteger)index
{
    return index == 0 ? 1 : [super indexOfChildAfterChildAtIndex:index];
}

- (NSUInteger)indexOfChildBeforeChildAtIndex:(NSUInteger)index
{
    return index == 1 ? 0 : [super indexOfChildBeforeChildAtIndex:index];
}

- (NSUInteger)indexOfChildBelowChildAtIndex:(NSUInteger)index
{
    return 1;
}

- (NSUInteger)indexOfChildAboveChildAtIndex:(NSUInteger)index
{
    return 0;
}

- (NSIndexSet *)indexesOfRemainingChildren
{
    return [NSIndexSet indexSetWithIndex:1];
}

- (NSPoint)offsetOfChildLayoutAtIndex:(NSUInteger)index
{
    NSRect exponentBounds = [self childLayoutAtIndex:0].bounds;
    NSRect radicandBounds = [self childLayoutAtIndex:1].bounds;
    if (index == 0) {
        return NSMakePoint(0, (radicandBounds.size.height + radicandBounds.origin.y) / 2);
    } else {
        
        return NSMakePoint(exponentBounds.size.width + kRootFunctionSpaceBetweenRadicantAndExponent, 0);
    }
}

- (BOOL)childAtIndexUsesSmallSize:(NSUInteger)index
{
    return index == 0;
}

- (NSRect)generateBounds
{
    return NSZeroRect;
}

- (void)draw
{
    
}

@end