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611894329a
* Initial commit for ASStackLayoutSpec improvements * Remove the lock in ASStackLayoutSpec and make the ASStackLayoutSpecStyle const I think we don't need lock here as the style already has a lock while we set the value * Add ASStackLayoutSpecItem that replaces layout specific items * Prevent baseline pass if not needed * Update comments
48 lines
1.7 KiB
Objective-C
48 lines
1.7 KiB
Objective-C
//
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// ASStackUnpositionedLayout.h
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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 <vector>
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#import "ASLayout.h"
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#import "ASStackLayoutSpecUtilities.h"
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#import "ASStackLayoutSpec.h"
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struct ASStackLayoutSpecChild {
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/** The original source child. */
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id<ASLayoutElement> element;
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/** Style object of element. */
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ASLayoutElementStyle *style;
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/** Size object of the element */
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ASLayoutElementSize size;
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};
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struct ASStackLayoutSpecItem {
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/** The original source child. */
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ASStackLayoutSpecChild child;
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/** The proposed layout or nil if no is calculated yet. */
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ASLayout *layout;
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};
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/** Represents a set of stack layout children that have their final layout computed, but are not yet positioned. */
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struct ASStackUnpositionedLayout {
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/** A set of proposed child layouts, not yet positioned. */
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const std::vector<ASStackLayoutSpecItem> items;
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/** The total size of the children in the stack dimension, including all spacing. */
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const CGFloat stackDimensionSum;
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/** The amount by which stackDimensionSum violates constraints. If positive, less than min; negative, greater than max. */
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const CGFloat violation;
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/** Given a set of children, computes the unpositioned layouts for those children. */
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static ASStackUnpositionedLayout compute(const std::vector<ASStackLayoutSpecChild> &children,
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const ASStackLayoutSpecStyle &style,
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const ASSizeRange &sizeRange);
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};
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