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//
// MASConstraintMaker.m
// Masonry
//
// Created by Jonas Budelmann on 20/07/13.
// Copyright (c) 2013 cloudling. All rights reserved.
//
#import "MASConstraintMaker.h"
#import "MASViewConstraint.h"
#import "MASCompositeConstraint.h"
#import "MASConstraint+Private.h"
#import "MASViewAttribute.h"
#import "View+MASAdditions.h"
@interface MASConstraintMaker () <MASConstraintDelegate>
@property (nonatomic, weak) MAS_VIEW *view;
@property (nonatomic, strong) NSMutableArray *constraints;
@end
@implementation MASConstraintMaker
- (id)initWithView:(MAS_VIEW *)view {
self = [super init];
if (!self) return nil;
self.view = view;
self.constraints = NSMutableArray.new;
return self;
}
- (NSArray *)install {
if (self.removeExisting) {
NSArray *installedConstraints = [MASViewConstraint installedConstraintsForView:self.view];
for (MASConstraint *constraint in installedConstraints) {
[constraint uninstall];
}
}
NSArray *constraints = self.constraints.copy;
for (MASConstraint *constraint in constraints) {
constraint.updateExisting = self.updateExisting;
[constraint install];
}
[self.constraints removeAllObjects];
return constraints;
}
#pragma mark - MASConstraintDelegate
- (void)constraint:(MASConstraint *)constraint shouldBeReplacedWithConstraint:(MASConstraint *)replacementConstraint {
NSUInteger index = [self.constraints indexOfObject:constraint];
NSAssert(index != NSNotFound, @"Could not find constraint %@", constraint);
[self.constraints replaceObjectAtIndex:index withObject:replacementConstraint];
}
- (MASConstraint *)constraint:(MASConstraint *)constraint addConstraintWithLayoutAttribute:(NSLayoutAttribute)layoutAttribute {
MASViewAttribute *viewAttribute = [[MASViewAttribute alloc] initWithView:self.view layoutAttribute:layoutAttribute];
MASViewConstraint *newConstraint = [[MASViewConstraint alloc] initWithFirstViewAttribute:viewAttribute];
if ([constraint isKindOfClass:MASViewConstraint.class]) {
//replace with composite constraint
NSArray *children = @[constraint, newConstraint];
MASCompositeConstraint *compositeConstraint = [[MASCompositeConstraint alloc] initWithChildren:children];
compositeConstraint.delegate = self;
[self constraint:constraint shouldBeReplacedWithConstraint:compositeConstraint];
return compositeConstraint;
}
if (!constraint) {
newConstraint.delegate = self;
[self.constraints addObject:newConstraint];
}
return newConstraint;
}
- (MASConstraint *)addConstraintWithAttributes:(MASAttribute)attrs {
__unused MASAttribute anyAttribute = (MASAttributeLeft | MASAttributeRight | MASAttributeTop | MASAttributeBottom | MASAttributeLeading
| MASAttributeTrailing | MASAttributeWidth | MASAttributeHeight | MASAttributeCenterX
| MASAttributeCenterY | MASAttributeBaseline
| MASAttributeFirstBaseline | MASAttributeLastBaseline
#if TARGET_OS_IPHONE || TARGET_OS_TV
| MASAttributeLeftMargin | MASAttributeRightMargin | MASAttributeTopMargin | MASAttributeBottomMargin
| MASAttributeLeadingMargin | MASAttributeTrailingMargin | MASAttributeCenterXWithinMargins
| MASAttributeCenterYWithinMargins
#endif
);
NSAssert((attrs & anyAttribute) != 0, @"You didn't pass any attribute to make.attributes(...)");
NSMutableArray *attributes = [NSMutableArray array];
if (attrs & MASAttributeLeft) [attributes addObject:self.view.mas_left];
if (attrs & MASAttributeRight) [attributes addObject:self.view.mas_right];
if (attrs & MASAttributeTop) [attributes addObject:self.view.mas_top];
if (attrs & MASAttributeBottom) [attributes addObject:self.view.mas_bottom];
if (attrs & MASAttributeLeading) [attributes addObject:self.view.mas_leading];
if (attrs & MASAttributeTrailing) [attributes addObject:self.view.mas_trailing];
if (attrs & MASAttributeWidth) [attributes addObject:self.view.mas_width];
if (attrs & MASAttributeHeight) [attributes addObject:self.view.mas_height];
if (attrs & MASAttributeCenterX) [attributes addObject:self.view.mas_centerX];
if (attrs & MASAttributeCenterY) [attributes addObject:self.view.mas_centerY];
if (attrs & MASAttributeBaseline) [attributes addObject:self.view.mas_baseline];
if (attrs & MASAttributeFirstBaseline) [attributes addObject:self.view.mas_firstBaseline];
if (attrs & MASAttributeLastBaseline) [attributes addObject:self.view.mas_lastBaseline];
#if TARGET_OS_IPHONE || TARGET_OS_TV
if (attrs & MASAttributeLeftMargin) [attributes addObject:self.view.mas_leftMargin];
if (attrs & MASAttributeRightMargin) [attributes addObject:self.view.mas_rightMargin];
if (attrs & MASAttributeTopMargin) [attributes addObject:self.view.mas_topMargin];
if (attrs & MASAttributeBottomMargin) [attributes addObject:self.view.mas_bottomMargin];
if (attrs & MASAttributeLeadingMargin) [attributes addObject:self.view.mas_leadingMargin];
if (attrs & MASAttributeTrailingMargin) [attributes addObject:self.view.mas_trailingMargin];
if (attrs & MASAttributeCenterXWithinMargins) [attributes addObject:self.view.mas_centerXWithinMargins];
if (attrs & MASAttributeCenterYWithinMargins) [attributes addObject:self.view.mas_centerYWithinMargins];
#endif
NSMutableArray *children = [NSMutableArray arrayWithCapacity:attributes.count];
for (MASViewAttribute *a in attributes) {
[children addObject:[[MASViewConstraint alloc] initWithFirstViewAttribute:a]];
}
MASCompositeConstraint *constraint = [[MASCompositeConstraint alloc] initWithChildren:children];
constraint.delegate = self;
[self.constraints addObject:constraint];
return constraint;
}
#pragma mark - standard Attributes
- (MASConstraint *)addConstraintWithLayoutAttribute:(NSLayoutAttribute)layoutAttribute {
return [self constraint:nil addConstraintWithLayoutAttribute:layoutAttribute];
}
- (MASConstraint *)left {
return [self addConstraintWithLayoutAttribute:NSLayoutAttributeLeft];
}
- (MASConstraint *)top {
return [self addConstraintWithLayoutAttribute:NSLayoutAttributeTop];
}
- (MASConstraint *)right {
return [self addConstraintWithLayoutAttribute:NSLayoutAttributeRight];
}
- (MASConstraint *)bottom {
return [self addConstraintWithLayoutAttribute:NSLayoutAttributeBottom];
}
- (MASConstraint *)leading {
return [self addConstraintWithLayoutAttribute:NSLayoutAttributeLeading];
}
- (MASConstraint *)trailing {
return [self addConstraintWithLayoutAttribute:NSLayoutAttributeTrailing];
}
- (MASConstraint *)width {
return [self addConstraintWithLayoutAttribute:NSLayoutAttributeWidth];
}
- (MASConstraint *)height {
return [self addConstraintWithLayoutAttribute:NSLayoutAttributeHeight];
}
- (MASConstraint *)centerX {
return [self addConstraintWithLayoutAttribute:NSLayoutAttributeCenterX];
}
- (MASConstraint *)centerY {
return [self addConstraintWithLayoutAttribute:NSLayoutAttributeCenterY];
}
- (MASConstraint *)baseline {
return [self addConstraintWithLayoutAttribute:NSLayoutAttributeBaseline];
}
- (MASConstraint *(^)(MASAttribute))attributes {
return ^(MASAttribute attrs){
return [self addConstraintWithAttributes:attrs];
};
}
- (MASConstraint *)firstBaseline {
return [self addConstraintWithLayoutAttribute:NSLayoutAttributeFirstBaseline];
}
- (MASConstraint *)lastBaseline {
return [self addConstraintWithLayoutAttribute:NSLayoutAttributeLastBaseline];
}
#if TARGET_OS_IPHONE || TARGET_OS_TV
- (MASConstraint *)leftMargin {
return [self addConstraintWithLayoutAttribute:NSLayoutAttributeLeftMargin];
}
- (MASConstraint *)rightMargin {
return [self addConstraintWithLayoutAttribute:NSLayoutAttributeRightMargin];
}
- (MASConstraint *)topMargin {
return [self addConstraintWithLayoutAttribute:NSLayoutAttributeTopMargin];
}
- (MASConstraint *)bottomMargin {
return [self addConstraintWithLayoutAttribute:NSLayoutAttributeBottomMargin];
}
- (MASConstraint *)leadingMargin {
return [self addConstraintWithLayoutAttribute:NSLayoutAttributeLeadingMargin];
}
- (MASConstraint *)trailingMargin {
return [self addConstraintWithLayoutAttribute:NSLayoutAttributeTrailingMargin];
}
- (MASConstraint *)centerXWithinMargins {
return [self addConstraintWithLayoutAttribute:NSLayoutAttributeCenterXWithinMargins];
}
- (MASConstraint *)centerYWithinMargins {
return [self addConstraintWithLayoutAttribute:NSLayoutAttributeCenterYWithinMargins];
}
#endif
#pragma mark - composite Attributes
- (MASConstraint *)edges {
return [self addConstraintWithAttributes:MASAttributeTop | MASAttributeLeft | MASAttributeRight | MASAttributeBottom];
}
- (MASConstraint *)size {
return [self addConstraintWithAttributes:MASAttributeWidth | MASAttributeHeight];
}
- (MASConstraint *)center {
return [self addConstraintWithAttributes:MASAttributeCenterX | MASAttributeCenterY];
}
#pragma mark - grouping
- (MASConstraint *(^)(dispatch_block_t group))group {
return ^id(dispatch_block_t group) {
NSInteger previousCount = self.constraints.count;
group();
NSArray *children = [self.constraints subarrayWithRange:NSMakeRange(previousCount, self.constraints.count - previousCount)];
MASCompositeConstraint *constraint = [[MASCompositeConstraint alloc] initWithChildren:children];
constraint.delegate = self;
return constraint;
};
}
@end