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//
// PSTCollectionLayoutSection.h
// PSPDFKit
//
// Copyright (c) 2012 Peter Steinberger. All rights reserved.
//
#import <Foundation/Foundation.h>
@class PSTGridLayoutInfo, PSTGridLayoutRow, PSTGridLayoutItem;
@interface PSTGridLayoutSection : NSObject
@property (nonatomic, strong, readonly) NSArray *items;
@property (nonatomic, strong, readonly) NSArray *rows;
// fast path for equal-size items
@property (nonatomic, assign) BOOL fixedItemSize;
@property (nonatomic, assign) CGSize itemSize;
// depending on fixedItemSize, this either is a _ivar or queries items.
@property (nonatomic, assign) NSInteger itemsCount;
@property (nonatomic, assign) CGFloat verticalInterstice;
@property (nonatomic, assign) CGFloat horizontalInterstice;
@property (nonatomic, assign) UIEdgeInsets sectionMargins;
@property (nonatomic, assign) CGRect frame;
@property (nonatomic, assign) CGRect headerFrame;
@property (nonatomic, assign) CGRect footerFrame;
@property (nonatomic, assign) CGFloat headerDimension;
@property (nonatomic, assign) CGFloat footerDimension;
@property (nonatomic, unsafe_unretained) PSTGridLayoutInfo *layoutInfo;
@property (nonatomic, strong) NSDictionary *rowAlignmentOptions;
@property (nonatomic, assign, readonly) CGFloat otherMargin;
@property (nonatomic, assign, readonly) CGFloat beginMargin;
@property (nonatomic, assign, readonly) CGFloat endMargin;
@property (nonatomic, assign, readonly) CGFloat actualGap;
@property (nonatomic, assign, readonly) CGFloat lastRowBeginMargin;
@property (nonatomic, assign, readonly) CGFloat lastRowEndMargin;
@property (nonatomic, assign, readonly) CGFloat lastRowActualGap;
@property (nonatomic, assign, readonly) BOOL lastRowIncomplete;
@property (nonatomic, assign, readonly) NSInteger itemsByRowCount;
@property (nonatomic, assign, readonly) NSInteger indexOfImcompleteRow; // typo as of iOS6B3
//- (PSTGridLayoutSection *)copyFromLayoutInfo:(PSTGridLayoutInfo *)layoutInfo;
// Faster variant of invalidate/compute
- (void)recomputeFromIndex:(NSInteger)index;
// Invalidate layout. Destroys rows.
- (void)invalidate;
// Compute layout. Creates rows.
- (void)computeLayout;
- (PSTGridLayoutItem *)addItem;
- (PSTGridLayoutRow *)addRow;
// Copy snapshot of current object
- (PSTGridLayoutSection *)snapshot;
@end
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