109 lines
3.7 KiB
Plaintext
109 lines
3.7 KiB
Plaintext
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/*
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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#import "RCTSurfaceHostingComponent.h"
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#import "RCTSurfaceHostingComponent+Internal.h"
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#import <UIKit/UIKit.h>
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#import <ComponentKit/CKComponentSubclass.h>
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#import <React/RCTSurface.h>
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#import <React/RCTSurfaceView.h>
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#import "RCTSurfaceHostingComponentController.h"
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#import "RCTSurfaceHostingComponentState.h"
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@implementation RCTSurfaceHostingComponent
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+ (Class<CKComponentControllerProtocol>)controllerClass
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{
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return [RCTSurfaceHostingComponentController class];
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}
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+ (id)initialState
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{
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return [RCTSurfaceHostingComponentState new];
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}
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+ (instancetype)newWithSurface:(RCTSurface *)surface options:(RCTSurfaceHostingComponentOptions)options
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{
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CKComponentScope scope(self, surface);
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RCTSurfaceHostingComponentState *const state = scope.state();
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RCTSurfaceHostingComponentState *const newState =
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[RCTSurfaceHostingComponentState newWithStage:surface.stage
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intrinsicSize:surface.intrinsicSize];
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if (![state isEqual:newState]) {
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CKComponentScope::replaceState(scope, newState);
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}
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RCTSurfaceHostingComponent *const component =
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[super newWithView:{[UIView class]} size:{}];
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if (component) {
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component->_state = scope.state();
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component->_surface = surface;
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component->_options = options;
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}
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return component;
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}
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- (CKComponentLayout)computeLayoutThatFits:(CKSizeRange)constrainedSize
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{
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// Optimistically communicating layout constraints to the `_surface`,
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// just to provide layout constraints to React Native as early as possible.
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// React Native *may* use this info later during applying the own state and
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// related laying out in parallel with ComponentKit execution.
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// This call will not interfere (or introduce any negative side effects) with
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// following invocation of `sizeThatFitsMinimumSize:maximumSize:`.
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// A weak point: We assume here that this particular layout will be
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// mounted eventually, which is technically not guaranteed by ComponentKit.
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// Therefore we also assume that the last layout calculated in a sequence
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// will be mounted anyways, which is probably true for all *real* use cases.
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// We plan to tackle this problem during the next big step in improving
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// interop compatibilities of React Native which will enable us granularly
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// control React Native mounting blocks and, as a result, implement
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// truly synchronous mounting stage between React Native and ComponentKit.
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[_surface setMinimumSize:constrainedSize.min
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maximumSize:constrainedSize.max];
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// Just in case of the very first building pass, we give React Native a chance
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// to prepare its internals for coming synchronous measuring.
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[_surface synchronouslyWaitForStage:RCTSurfaceStageSurfaceDidInitialLayout
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timeout:_options.synchronousLayoutingTimeout];
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CGSize fittingSize = CGSizeZero;
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if (_surface.stage & RCTSurfaceStageSurfaceDidInitialLayout) {
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fittingSize = [_surface sizeThatFitsMinimumSize:constrainedSize.min
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maximumSize:constrainedSize.max];
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}
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else {
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fittingSize = _options.activityIndicatorSize;
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}
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fittingSize = constrainedSize.clamp(fittingSize);
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return {self, fittingSize};
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}
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- (CKComponentBoundsAnimation)boundsAnimationFromPreviousComponent:(RCTSurfaceHostingComponent *)previousComponent
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{
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if (_options.boundsAnimations && (previousComponent->_state.stage != _state.stage)) {
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return {
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.mode = CKComponentBoundsAnimationModeDefault,
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.duration = 0.25,
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.options = UIViewAnimationOptionCurveEaseInOut,
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};
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}
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return {};
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}
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@end
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