TTRoundedRectangleShape.m

//
// Copyright 2009-2011 Facebook
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//    http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//

#import "Three20Style/TTRoundedRectangleShape.h"

// Style (private)
#import "Three20Style/private/TTShapeInternal.h"


///////////////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////////////
@implementation TTRoundedRectangleShape

@synthesize topLeftRadius     = _topLeftRadius;
@synthesize topRightRadius    = _topRightRadius;
@synthesize bottomRightRadius = _bottomRightRadius;
@synthesize bottomLeftRadius  = _bottomLeftRadius;


///////////////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////////////
#pragma mark -
#pragma mark Class public


///////////////////////////////////////////////////////////////////////////////////////////////////
+ (TTRoundedRectangleShape*)shapeWithRadius:(CGFloat)radius {
  TTRoundedRectangleShape* shape = [[[TTRoundedRectangleShape alloc] init] autorelease];
  shape.topLeftRadius = shape.topRightRadius = shape.bottomRightRadius = shape.bottomLeftRadius
  = radius;
  return shape;
}


///////////////////////////////////////////////////////////////////////////////////////////////////
+ (TTRoundedRectangleShape*)shapeWithTopLeft:(CGFloat)topLeft topRight:(CGFloat)topRight
                                 bottomRight:(CGFloat)bottomRight bottomLeft:(CGFloat)bottomLeft {
  TTRoundedRectangleShape* shape = [[[TTRoundedRectangleShape alloc] init] autorelease];
  shape.topLeftRadius = topLeft;
  shape.topRightRadius = topRight;
  shape.bottomRightRadius = bottomRight;
  shape.bottomLeftRadius = bottomLeft;
  return shape;
}


///////////////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////////////
#pragma mark -
#pragma mark Public


///////////////////////////////////////////////////////////////////////////////////////////////////
- (void)addToPath:(CGRect)rect {
  [self openPath:rect];

  CGFloat fw = rect.size.width;
  CGFloat fh = rect.size.height;

  CGContextRef context = UIGraphicsGetCurrentContext();
  CGContextMoveToPoint(context, fw, floor(fh/2));
  CGContextAddArcToPoint(context, fw, fh, floor(fw/2), fh, RD(_bottomRightRadius));
  CGContextAddArcToPoint(context, 0, fh, 0, floor(fh/2), RD(_bottomLeftRadius));
  CGContextAddArcToPoint(context, 0, 0, floor(fw/2), 0, RD(_topLeftRadius));
  CGContextAddArcToPoint(context, fw, 0, fw, floor(fh/2), RD(_topRightRadius));

  [self closePath:rect];
}


///////////////////////////////////////////////////////////////////////////////////////////////////
- (void)addInverseToPath:(CGRect)rect {
  CGContextRef context = UIGraphicsGetCurrentContext();

  CGFloat fw = rect.size.width;
  CGFloat fh = rect.size.height;

  CGFloat width = 5.0f;
  CGRect shadowRect = CGRectMake(-width, -width, fw+width*2, fh+width*2);
  CGMutablePathRef path = CGPathCreateMutable();
  CGPathAddRect(path, nil, shadowRect);
  CGPathCloseSubpath(path);

  CGPathMoveToPoint(path, nil, fw, floor(fh/2));
  CGPathAddArcToPoint(path, nil, fw, fh, floor(fw/2), fh, RD(_bottomRightRadius));
  CGPathAddArcToPoint(path, nil, 0, fh, 0, floor(fh/2), RD(_bottomLeftRadius));
  CGPathAddArcToPoint(path, nil, 0, 0, floor(fw/2), 0, RD(_topLeftRadius));
  CGPathAddArcToPoint(path, nil, fw, 0, fw, floor(fh/2), RD(_topRightRadius));
  CGPathCloseSubpath(path);

  [self openPath:rect];
  CGContextAddPath(context, path);
  [self closePath:rect];

  CGPathRelease(path);
}


///////////////////////////////////////////////////////////////////////////////////////////////////
- (void)addTopEdgeToPath:(CGRect)rect lightSource:(NSInteger)lightSource {
  CGContextRef context = UIGraphicsGetCurrentContext();
  CGFloat fw = rect.size.width;
  CGFloat fh = rect.size.height;

  if (lightSource >= 0 && lightSource <= 90) {
    CGContextMoveToPoint(context, RD(_topLeftRadius), 0);

  } else {
    CGContextMoveToPoint(context, 0, RD(_topLeftRadius));
    CGContextAddArcToPoint(context, 0, 0, RD(_topLeftRadius), 0, RD(_topLeftRadius));
  }
  CGContextAddArcToPoint(context, fw, 0, fw, RD(_topRightRadius), RD(_topRightRadius));
  CGContextAddLineToPoint(context, fw, RD(_topRightRadius));
}


///////////////////////////////////////////////////////////////////////////////////////////////////
- (void)addRightEdgeToPath:(CGRect)rect lightSource:(NSInteger)lightSource {
  CGContextRef context = UIGraphicsGetCurrentContext();
  CGFloat fw = rect.size.width;
  CGFloat fh = rect.size.height;

  CGContextMoveToPoint(context, fw, RD(_topRightRadius));
  CGContextAddArcToPoint(context, fw, fh, fw-RD(_bottomRightRadius), fh, RD(_bottomRightRadius));
  CGContextAddLineToPoint(context, fw-RD(_bottomRightRadius), fh);
}


///////////////////////////////////////////////////////////////////////////////////////////////////
- (void)addBottomEdgeToPath:(CGRect)rect lightSource:(NSInteger)lightSource {
  CGContextRef context = UIGraphicsGetCurrentContext();
  CGFloat fw = rect.size.width;
  CGFloat fh = rect.size.height;

  CGContextMoveToPoint(context, fw-RD(_bottomRightRadius), fh);
  CGContextAddLineToPoint(context, RD(_bottomLeftRadius), fh);
  CGContextAddArcToPoint(context, 0, fh, 0, fh-RD(_bottomLeftRadius), RD(_bottomLeftRadius));
}


///////////////////////////////////////////////////////////////////////////////////////////////////
- (void)addLeftEdgeToPath:(CGRect)rect lightSource:(NSInteger)lightSource {
  CGContextRef context = UIGraphicsGetCurrentContext();
  CGFloat fh = rect.size.height;

  CGContextMoveToPoint(context, 0, fh-RD(_bottomLeftRadius));
  CGContextAddLineToPoint(context, 0, RD(_topLeftRadius));

  if (lightSource >= 0 && lightSource <= 90) {
    CGContextAddArcToPoint(context, 0, 0, RD(_topLeftRadius), 0, RD(_topLeftRadius));
  }
}


///////////////////////////////////////////////////////////////////////////////////////////////////
//- (UIEdgeInsets)insetsForSize:(CGSize)size {
//  CGFloat fh = size.height/3;
//  return UIEdgeInsetsMake(floor(MAX(RD(_topLeftRadius), RD(_topRightRadius))),
//                          floor(MAX(RD(_topLeftRadius), RD(_bottomLeftRadius))),
//                          floor(MAX(RD(_bottomLeftRadius), RD(_bottomRightRadius))),
//                          floor(MAX(RD(_topRightRadius), RD(_bottomRightRadius))));
//}


@end