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78 lines
2.9 KiB
Plaintext
78 lines
2.9 KiB
Plaintext
//
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// ASCenterLayoutSpec.mm
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// AsyncDisplayKit
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//
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// Copyright (c) 2014-present, Facebook, Inc. All rights reserved.
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// This source code is licensed under the BSD-style license found in the
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// LICENSE file in the root directory of this source tree. An additional grant
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// of patent rights can be found in the PATENTS file in the same directory.
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//
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#import <AsyncDisplayKit/ASCenterLayoutSpec.h>
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#import <AsyncDisplayKit/ASLayout.h>
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@implementation ASCenterLayoutSpec
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{
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ASCenterLayoutSpecCenteringOptions _centeringOptions;
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ASCenterLayoutSpecSizingOptions _sizingOptions;
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}
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- (instancetype)initWithCenteringOptions:(ASCenterLayoutSpecCenteringOptions)centeringOptions
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sizingOptions:(ASCenterLayoutSpecSizingOptions)sizingOptions
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child:(id<ASLayoutElement>)child;
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{
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ASRelativeLayoutSpecPosition verticalPosition = [self verticalPositionFromCenteringOptions:centeringOptions];
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ASRelativeLayoutSpecPosition horizontalPosition = [self horizontalPositionFromCenteringOptions:centeringOptions];
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if (!(self = [super initWithHorizontalPosition:horizontalPosition verticalPosition:verticalPosition sizingOption:sizingOptions child:child])) {
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return nil;
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}
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_centeringOptions = centeringOptions;
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_sizingOptions = sizingOptions;
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return self;
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}
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+ (instancetype)centerLayoutSpecWithCenteringOptions:(ASCenterLayoutSpecCenteringOptions)centeringOptions
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sizingOptions:(ASCenterLayoutSpecSizingOptions)sizingOptions
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child:(id<ASLayoutElement>)child
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{
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return [[self alloc] initWithCenteringOptions:centeringOptions sizingOptions:sizingOptions child:child];
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}
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- (void)setCenteringOptions:(ASCenterLayoutSpecCenteringOptions)centeringOptions
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{
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ASDisplayNodeAssert(self.isMutable, @"Cannot set properties when layout spec is not mutable");
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_centeringOptions = centeringOptions;
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[self setHorizontalPosition:[self horizontalPositionFromCenteringOptions:centeringOptions]];
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[self setVerticalPosition:[self verticalPositionFromCenteringOptions:centeringOptions]];
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}
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- (void)setSizingOptions:(ASCenterLayoutSpecSizingOptions)sizingOptions
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{
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ASDisplayNodeAssert(self.isMutable, @"Cannot set properties when layout spec is not mutable");
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_sizingOptions = sizingOptions;
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[self setSizingOption:sizingOptions];
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}
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- (ASRelativeLayoutSpecPosition)horizontalPositionFromCenteringOptions:(ASCenterLayoutSpecCenteringOptions)centeringOptions
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{
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if ((centeringOptions & ASCenterLayoutSpecCenteringX) != 0) {
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return ASRelativeLayoutSpecPositionCenter;
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} else {
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return ASRelativeLayoutSpecPositionNone;
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}
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}
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- (ASRelativeLayoutSpecPosition)verticalPositionFromCenteringOptions:(ASCenterLayoutSpecCenteringOptions)centeringOptions
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{
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if ((centeringOptions & ASCenterLayoutSpecCenteringY) != 0) {
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return ASRelativeLayoutSpecPositionCenter;
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} else {
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return ASRelativeLayoutSpecPositionNone;
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}
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}
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@end
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