Swiftgram/Source/Base/ASAvailability.h
appleguy b285ece35f [Yoga] Implement ASYogaLayoutSpec, a simplified integration strategy for Yoga. (#270)
* [Yoga] Implement ASYogaLayoutSpec, an experimental alternative to full-tree integration.

This approach allows us to avoid any ASDisplayNode.mm integration points.
However, it is not yet proven to be possible to achieve correctness with this approach.

The entry point (to start calculating), and the measurement function inputs, lack
the full expressiveness of ASSizeRange; we need to make sure that workarounds like
using style.minSize are successful in simulating the behavior of a full Yoga tree.

* [Yoga] Fix file comments, move towards <ASLayoutElement> support.

* [Yoga] Important fix for simplified, non-contiguous Yoga integration.

* [Yoga] Complete implementation of manual memory management (__bridge_transfer, YGNodeFree)
2017-05-29 15:39:24 -07:00

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Objective-C

//
// ASAvailability.h
// Texture
//
// Copyright (c) 2014-present, Facebook, Inc. All rights reserved.
// This source code is licensed under the BSD-style license found in the
// LICENSE file in the /ASDK-Licenses directory of this source tree. An additional
// grant of patent rights can be found in the PATENTS file in the same directory.
//
// Modifications to this file made after 4/13/2017 are: Copyright (c) 2017-present,
// Pinterest, Inc. Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
#import <CoreFoundation/CFBase.h>
#pragma once
#ifndef kCFCoreFoundationVersionNumber_iOS_9_0
#define kCFCoreFoundationVersionNumber_iOS_9_0 1240.10
#endif
#ifndef kCFCoreFoundationVersionNumber_iOS_10_0
#define kCFCoreFoundationVersionNumber_iOS_10_0 1348.00
#endif
#define AS_AT_LEAST_IOS9 (kCFCoreFoundationVersionNumber >= kCFCoreFoundationVersionNumber_iOS_9_0)
#define AS_AT_LEAST_IOS10 (kCFCoreFoundationVersionNumber >= kCFCoreFoundationVersionNumber_iOS_10_0)
// If Yoga is available, make it available anywhere we use ASAvailability.
// This reduces Yoga-specific code in other files.
// NOTE: Yoga integration is experimental and not fully tested. Use with caution and test layouts carefully.
#ifndef YOGA_HEADER_PATH
#define YOGA_HEADER_PATH <Yoga/Yoga.h>
#endif
#ifndef YOGA
#define YOGA __has_include(YOGA_HEADER_PATH)
#endif
// Contiguous Yoga layout attempts to build a connected tree of YGNodeRef objects, across multiple levels
// in the ASDisplayNode tree (based on .yogaChildren). When disabled, ASYogaLayoutSpec is used, with a
// disjoint Yoga tree for each level in the hierarchy. Currently, both modes are experimental.
#ifndef YOGA_TREE_CONTIGUOUS
#define YOGA_TREE_CONTIGUOUS 0 // To enable, set to YOGA, as the code depends on YOGA also being set.
#endif
#define AS_PIN_REMOTE_IMAGE __has_include(<PINRemoteImage/PINRemoteImage.h>)
#define AS_IG_LIST_KIT __has_include(<IGListKit/IGListKit.h>)
/**
* For IGListKit versions < 3.0, you have to use IGListCollectionView.
* For 3.0 and later, that class is removed and you use UICollectionView.
*/
#define IG_LIST_COLLECTION_VIEW __has_include(<IGListKit/IGListCollectionView.h>)