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086bd8a52b
This spec allows positioning a child at any 9-part box position (corners, edges, or center).
81 lines
2.9 KiB
Plaintext
81 lines
2.9 KiB
Plaintext
/*
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* Copyright (c) 2014-present, Facebook, Inc.
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* All rights reserved.
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*
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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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*/
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#import "ASCenterLayoutSpec.h"
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#import "ASInternalHelpers.h"
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#import "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<ASLayoutable>)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<ASLayoutable>)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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BOOL centerX = (centeringOptions & ASCenterLayoutSpecCenteringX) != 0;
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if (centerX) {
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return ASRelativeLayoutSpecPositionCenter;
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} else {
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return ASRelativeLayoutSpecPositionStart;
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}
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}
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- (ASRelativeLayoutSpecPosition)verticalPositionFromCenteringOptions:(ASCenterLayoutSpecCenteringOptions)centeringOptions
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{
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BOOL centerY = (centeringOptions & ASCenterLayoutSpecCenteringY) != 0;
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if (centerY) {
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return ASRelativeLayoutSpecPositionCenter;
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} else {
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return ASRelativeLayoutSpecPositionStart;
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}
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}
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@end
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