/*

 Erica Sadun, http://ericasadun.com
 https://github.com/erica/iOS-Drawing/tree/master/C08/Quartz%20Book%20Pack/Bezier
 */

#import "RNSVGBezierElement.h"

#pragma mark - Bezier Element -

@implementation RNSVGBezierElement
- (instancetype)init
{
  self = [super init];
  if (self) {
    _elementType = kCGPathElementMoveToPoint;
    _point = RNSVGNULLPOINT;
    _controlPoint1 = RNSVGNULLPOINT;
    _controlPoint2 = RNSVGNULLPOINT;
  }
  return self;
}

+ (instancetype)elementWithPathElement:(CGPathElement)element
{
  RNSVGBezierElement *newElement = [[self alloc] init];
  newElement.elementType = element.type;

  switch (newElement.elementType) {
    case kCGPathElementCloseSubpath:
      break;
    case kCGPathElementMoveToPoint:
    case kCGPathElementAddLineToPoint: {
      newElement.point = element.points[0];
      break;
    }
    case kCGPathElementAddQuadCurveToPoint: {
      newElement.point = element.points[1];
      newElement.controlPoint1 = element.points[0];
      break;
    }
    case kCGPathElementAddCurveToPoint: {
      newElement.point = element.points[2];
      newElement.controlPoint1 = element.points[0];
      newElement.controlPoint2 = element.points[1];
      break;
    }
    default:
      break;
  }

  return newElement;
}

// Convert one element to RNSVGBezierElement and save to array
void RNSVGBezierElement_getBezierElements(void *info, const CGPathElement *element)
{
  NSMutableArray *bezierElements = (__bridge NSMutableArray *)info;
  if (element)
    [bezierElements addObject:[RNSVGBezierElement elementWithPathElement:*element]];
}

// Retrieve array of component elements
+ (NSArray *)elementsFromCGPath:(CGPathRef)path
{
  NSMutableArray *elements = [NSMutableArray array];
  CGPathApply(path, (__bridge void *)elements, RNSVGBezierElement_getBezierElements);
  return elements;
}

@end