//
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// MASConstraintBuilder.m
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// Masonry
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//
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// Created by Jonas Budelmann on 20/07/13.
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// Copyright (c) 2013 cloudling. All rights reserved.
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//
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#import "MASConstraintMaker.h"
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#import "MASViewConstraint.h"
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#import "MASCompositeConstraint.h"
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#import "MASConstraint+Private.h"
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#import "MASViewAttribute.h"
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#import "View+MASAdditions.h"
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@interface MASConstraintMaker () <MASConstraintDelegate>
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@property (nonatomic, weak) MAS_VIEW *view;
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@property (nonatomic, strong) NSMutableArray *constraints;
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@end
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@implementation MASConstraintMaker
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- (id)initWithView:(MAS_VIEW *)view {
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self = [super init];
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if (!self) return nil;
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self.view = view;
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self.constraints = NSMutableArray.new;
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return self;
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}
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- (NSArray *)install {
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if (self.removeExisting) {
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NSArray *installedConstraints = [MASViewConstraint installedConstraintsForView:self.view];
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for (MASConstraint *constraint in installedConstraints) {
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[constraint uninstall];
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}
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}
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NSArray *constraints = self.constraints.copy;
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for (MASConstraint *constraint in constraints) {
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constraint.updateExisting = self.updateExisting;
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[constraint install];
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}
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[self.constraints removeAllObjects];
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return constraints;
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}
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#pragma mark - MASConstraintDelegate
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- (void)constraint:(MASConstraint *)constraint shouldBeReplacedWithConstraint:(MASConstraint *)replacementConstraint {
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NSUInteger index = [self.constraints indexOfObject:constraint];
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NSAssert(index != NSNotFound, @"Could not find constraint %@", constraint);
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[self.constraints replaceObjectAtIndex:index withObject:replacementConstraint];
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}
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- (MASConstraint *)constraint:(MASConstraint *)constraint addConstraintWithLayoutAttribute:(NSLayoutAttribute)layoutAttribute {
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MASViewAttribute *viewAttribute = [[MASViewAttribute alloc] initWithView:self.view layoutAttribute:layoutAttribute];
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MASViewConstraint *newConstraint = [[MASViewConstraint alloc] initWithFirstViewAttribute:viewAttribute];
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if ([constraint isKindOfClass:MASViewConstraint.class]) {
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//replace with composite constraint
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NSArray *children = @[constraint, newConstraint];
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MASCompositeConstraint *compositeConstraint = [[MASCompositeConstraint alloc] initWithChildren:children];
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compositeConstraint.delegate = self;
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[self constraint:constraint shouldBeReplacedWithConstraint:compositeConstraint];
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return compositeConstraint;
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}
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if (!constraint) {
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newConstraint.delegate = self;
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[self.constraints addObject:newConstraint];
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}
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return newConstraint;
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}
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- (MASConstraint *)addConstraintWithAttributes:(MASAttribute)attrs {
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__unused MASAttribute anyAttribute = (MASAttributeLeft | MASAttributeRight | MASAttributeTop | MASAttributeBottom | MASAttributeLeading
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| MASAttributeTrailing | MASAttributeWidth | MASAttributeHeight | MASAttributeCenterX
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| MASAttributeCenterY | MASAttributeBaseline
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#if (__IPHONE_OS_VERSION_MIN_REQUIRED >= 80000) || (__TV_OS_VERSION_MIN_REQUIRED >= 9000) || (__MAC_OS_X_VERSION_MIN_REQUIRED >= 101100)
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| MASAttributeFirstBaseline | MASAttributeLastBaseline
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#endif
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#if TARGET_OS_IPHONE || TARGET_OS_TV
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| MASAttributeLeftMargin | MASAttributeRightMargin | MASAttributeTopMargin | MASAttributeBottomMargin
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| MASAttributeLeadingMargin | MASAttributeTrailingMargin | MASAttributeCenterXWithinMargins
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| MASAttributeCenterYWithinMargins
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#endif
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);
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NSAssert((attrs & anyAttribute) != 0, @"You didn't pass any attribute to make.attributes(...)");
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NSMutableArray *attributes = [NSMutableArray array];
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if (attrs & MASAttributeLeft) [attributes addObject:self.view.mas_left];
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if (attrs & MASAttributeRight) [attributes addObject:self.view.mas_right];
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if (attrs & MASAttributeTop) [attributes addObject:self.view.mas_top];
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if (attrs & MASAttributeBottom) [attributes addObject:self.view.mas_bottom];
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if (attrs & MASAttributeLeading) [attributes addObject:self.view.mas_leading];
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if (attrs & MASAttributeTrailing) [attributes addObject:self.view.mas_trailing];
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if (attrs & MASAttributeWidth) [attributes addObject:self.view.mas_width];
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if (attrs & MASAttributeHeight) [attributes addObject:self.view.mas_height];
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if (attrs & MASAttributeCenterX) [attributes addObject:self.view.mas_centerX];
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if (attrs & MASAttributeCenterY) [attributes addObject:self.view.mas_centerY];
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if (attrs & MASAttributeBaseline) [attributes addObject:self.view.mas_baseline];
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#if (__IPHONE_OS_VERSION_MIN_REQUIRED >= 80000) || (__TV_OS_VERSION_MIN_REQUIRED >= 9000) || (__MAC_OS_X_VERSION_MIN_REQUIRED >= 101100)
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if (attrs & MASAttributeFirstBaseline) [attributes addObject:self.view.mas_firstBaseline];
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if (attrs & MASAttributeLastBaseline) [attributes addObject:self.view.mas_lastBaseline];
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#endif
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#if TARGET_OS_IPHONE || TARGET_OS_TV
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if (attrs & MASAttributeLeftMargin) [attributes addObject:self.view.mas_leftMargin];
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if (attrs & MASAttributeRightMargin) [attributes addObject:self.view.mas_rightMargin];
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if (attrs & MASAttributeTopMargin) [attributes addObject:self.view.mas_topMargin];
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if (attrs & MASAttributeBottomMargin) [attributes addObject:self.view.mas_bottomMargin];
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if (attrs & MASAttributeLeadingMargin) [attributes addObject:self.view.mas_leadingMargin];
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if (attrs & MASAttributeTrailingMargin) [attributes addObject:self.view.mas_trailingMargin];
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if (attrs & MASAttributeCenterXWithinMargins) [attributes addObject:self.view.mas_centerXWithinMargins];
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if (attrs & MASAttributeCenterYWithinMargins) [attributes addObject:self.view.mas_centerYWithinMargins];
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#endif
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NSMutableArray *children = [NSMutableArray arrayWithCapacity:attributes.count];
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for (MASViewAttribute *a in attributes) {
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[children addObject:[[MASViewConstraint alloc] initWithFirstViewAttribute:a]];
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}
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MASCompositeConstraint *constraint = [[MASCompositeConstraint alloc] initWithChildren:children];
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constraint.delegate = self;
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[self.constraints addObject:constraint];
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return constraint;
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}
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#pragma mark - standard Attributes
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- (MASConstraint *)addConstraintWithLayoutAttribute:(NSLayoutAttribute)layoutAttribute {
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return [self constraint:nil addConstraintWithLayoutAttribute:layoutAttribute];
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}
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- (MASConstraint *)left {
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return [self addConstraintWithLayoutAttribute:NSLayoutAttributeLeft];
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}
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- (MASConstraint *)top {
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return [self addConstraintWithLayoutAttribute:NSLayoutAttributeTop];
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}
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- (MASConstraint *)right {
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return [self addConstraintWithLayoutAttribute:NSLayoutAttributeRight];
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}
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- (MASConstraint *)bottom {
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return [self addConstraintWithLayoutAttribute:NSLayoutAttributeBottom];
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}
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- (MASConstraint *)leading {
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return [self addConstraintWithLayoutAttribute:NSLayoutAttributeLeading];
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}
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- (MASConstraint *)trailing {
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return [self addConstraintWithLayoutAttribute:NSLayoutAttributeTrailing];
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}
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- (MASConstraint *)width {
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return [self addConstraintWithLayoutAttribute:NSLayoutAttributeWidth];
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}
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- (MASConstraint *)height {
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return [self addConstraintWithLayoutAttribute:NSLayoutAttributeHeight];
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}
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- (MASConstraint *)centerX {
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return [self addConstraintWithLayoutAttribute:NSLayoutAttributeCenterX];
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}
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- (MASConstraint *)centerY {
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return [self addConstraintWithLayoutAttribute:NSLayoutAttributeCenterY];
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}
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- (MASConstraint *)baseline {
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return [self addConstraintWithLayoutAttribute:NSLayoutAttributeBaseline];
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}
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- (MASConstraint *(^)(MASAttribute))attributes {
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return ^(MASAttribute attrs){
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return [self addConstraintWithAttributes:attrs];
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};
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}
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#if (__IPHONE_OS_VERSION_MIN_REQUIRED >= 80000) || (__TV_OS_VERSION_MIN_REQUIRED >= 9000) || (__MAC_OS_X_VERSION_MIN_REQUIRED >= 101100)
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- (MASConstraint *)firstBaseline {
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return [self addConstraintWithLayoutAttribute:NSLayoutAttributeFirstBaseline];
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}
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- (MASConstraint *)lastBaseline {
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return [self addConstraintWithLayoutAttribute:NSLayoutAttributeLastBaseline];
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}
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#endif
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#if TARGET_OS_IPHONE || TARGET_OS_TV
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- (MASConstraint *)leftMargin {
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return [self addConstraintWithLayoutAttribute:NSLayoutAttributeLeftMargin];
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}
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- (MASConstraint *)rightMargin {
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return [self addConstraintWithLayoutAttribute:NSLayoutAttributeRightMargin];
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}
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- (MASConstraint *)topMargin {
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return [self addConstraintWithLayoutAttribute:NSLayoutAttributeTopMargin];
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}
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- (MASConstraint *)bottomMargin {
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return [self addConstraintWithLayoutAttribute:NSLayoutAttributeBottomMargin];
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}
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- (MASConstraint *)leadingMargin {
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return [self addConstraintWithLayoutAttribute:NSLayoutAttributeLeadingMargin];
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}
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- (MASConstraint *)trailingMargin {
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return [self addConstraintWithLayoutAttribute:NSLayoutAttributeTrailingMargin];
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}
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- (MASConstraint *)centerXWithinMargins {
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return [self addConstraintWithLayoutAttribute:NSLayoutAttributeCenterXWithinMargins];
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}
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- (MASConstraint *)centerYWithinMargins {
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return [self addConstraintWithLayoutAttribute:NSLayoutAttributeCenterYWithinMargins];
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}
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#endif
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#pragma mark - composite Attributes
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- (MASConstraint *)edges {
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return [self addConstraintWithAttributes:MASAttributeTop | MASAttributeLeft | MASAttributeRight | MASAttributeBottom];
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}
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- (MASConstraint *)size {
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return [self addConstraintWithAttributes:MASAttributeWidth | MASAttributeHeight];
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}
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- (MASConstraint *)center {
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return [self addConstraintWithAttributes:MASAttributeCenterX | MASAttributeCenterY];
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}
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#pragma mark - grouping
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- (MASConstraint *(^)(dispatch_block_t group))group {
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return ^id(dispatch_block_t group) {
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NSInteger previousCount = self.constraints.count;
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group();
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NSArray *children = [self.constraints subarrayWithRange:NSMakeRange(previousCount, self.constraints.count - previousCount)];
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MASCompositeConstraint *constraint = [[MASCompositeConstraint alloc] initWithChildren:children];
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constraint.delegate = self;
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return constraint;
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};
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}
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@end
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