153 lines
6.1 KiB
Plaintext
153 lines
6.1 KiB
Plaintext
/**
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* Copyright (c) 2015-present, Facebook, Inc.
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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 "RCTMountingManager.h"
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#import <fabric/core/LayoutableShadowNode.h>
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#import <React/RCTAssert.h>
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#import <React/RCTUtils.h>
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#import "RCTComponentViewProtocol.h"
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#import "RCTComponentViewRegistry.h"
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#import "RCTMountItemProtocol.h"
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#import "RCTCreateMountItem.h"
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#import "RCTDeleteMountItem.h"
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#import "RCTInsertMountItem.h"
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#import "RCTRemoveMountItem.h"
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#import "RCTUpdatePropsMountItem.h"
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#import "RCTUpdateLayoutMetricsMountItem.h"
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using namespace facebook::react;
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@implementation RCTMountingManager
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- (instancetype)init
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{
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if (self = [super init]) {
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_componentViewRegistry = [[RCTComponentViewRegistry alloc] init];
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}
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return self;
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}
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- (void)mutateComponentViewTreeWithMutationInstructions:(facebook::react::TreeMutationInstructionList)instructions
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rootTag:(ReactTag)rootTag
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{
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NSMutableArray<RCTMountItemProtocol> *mountItems =
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[[NSMutableArray<RCTMountItemProtocol> alloc] initWithCapacity:instructions.size() * 2 /* ~ the worst case */];
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for (auto instruction : instructions) {
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switch (instruction.getType()) {
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case TreeMutationInstruction::Creation: {
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NSString *componentName = [NSString stringWithCString:instruction.getNewChildNode()->getComponentName().c_str()
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encoding:NSASCIIStringEncoding];
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RCTCreateMountItem *mountItem =
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[[RCTCreateMountItem alloc] initWithComponentName:componentName
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tag:instruction.getNewChildNode()->getTag()];
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[mountItems addObject:mountItem];
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break;
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}
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case TreeMutationInstruction::Deletion: {
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NSString *componentName = [NSString stringWithCString:instruction.getOldChildNode()->getComponentName().c_str()
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encoding:NSASCIIStringEncoding];
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RCTDeleteMountItem *mountItem =
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[[RCTDeleteMountItem alloc] initWithComponentName:componentName
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tag:instruction.getOldChildNode()->getTag()];
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[mountItems addObject:mountItem];
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break;
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}
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case TreeMutationInstruction::Insertion: {
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RCTInsertMountItem *mountItem =
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[[RCTInsertMountItem alloc] initWithChildTag:instruction.getNewChildNode()->getTag()
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parentTag:instruction.getParentNode()->getTag()
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index:instruction.getIndex()];
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[mountItems addObject:mountItem];
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// Props
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[mountItems addObject:[[RCTUpdatePropsMountItem alloc] initWithTag:instruction.getNewChildNode()->getTag()
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oldProps:nullptr
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newProps:instruction.getNewChildNode()->getProps()]];
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// Layout
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SharedLayoutableShadowNode layoutableNewShadowNode =
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std::dynamic_pointer_cast<const LayoutableShadowNode>(instruction.getNewChildNode());
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if (layoutableNewShadowNode) {
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[mountItems addObject:[[RCTUpdateLayoutMetricsMountItem alloc] initWithTag:instruction.getNewChildNode()->getTag()
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oldLayoutMetrics:{}
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newLayoutMetrics:layoutableNewShadowNode->getLayoutMetrics()]];
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}
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break;
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}
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case TreeMutationInstruction::Removal: {
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RCTRemoveMountItem *mountItem =
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[[RCTRemoveMountItem alloc] initWithChildTag:instruction.getOldChildNode()->getTag()
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parentTag:instruction.getParentNode()->getTag()
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index:instruction.getIndex()];
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[mountItems addObject:mountItem];
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break;
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}
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case TreeMutationInstruction::Replacement: {
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SharedShadowNode oldShadowNode = instruction.getOldChildNode();
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SharedShadowNode newShadowNode = instruction.getNewChildNode();
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// Props
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if (oldShadowNode->getProps() != newShadowNode->getProps()) {
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RCTUpdatePropsMountItem *mountItem =
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[[RCTUpdatePropsMountItem alloc] initWithTag:instruction.getOldChildNode()->getTag()
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oldProps:instruction.getOldChildNode()->getProps()
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newProps:instruction.getNewChildNode()->getProps()];
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[mountItems addObject:mountItem];
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}
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// Layout
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SharedLayoutableShadowNode layoutableOldShadowNode =
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std::dynamic_pointer_cast<const LayoutableShadowNode>(oldShadowNode);
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if (layoutableOldShadowNode) {
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SharedLayoutableShadowNode layoutableNewShadowNode =
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std::dynamic_pointer_cast<const LayoutableShadowNode>(newShadowNode);
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if (layoutableOldShadowNode->getLayoutMetrics() != layoutableNewShadowNode->getLayoutMetrics()) {
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RCTUpdateLayoutMetricsMountItem *mountItem =
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[[RCTUpdateLayoutMetricsMountItem alloc] initWithTag:instruction.getOldChildNode()->getTag()
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oldLayoutMetrics:layoutableOldShadowNode->getLayoutMetrics()
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newLayoutMetrics:layoutableNewShadowNode->getLayoutMetrics()];
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[mountItems addObject:mountItem];
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}
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}
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break;
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}
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}
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}
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RCTExecuteOnMainQueue(^{
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[self _performMountItems:mountItems rootTag:rootTag];
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});
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}
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- (void)_performMountItems:(NSArray<RCTMountItemProtocol> *)mountItems
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rootTag:(ReactTag)rootTag
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{
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RCTAssertMainQueue();
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[self.delegate mountingManager:self willMountComponentsWithRootTag:rootTag];
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for (id<RCTMountItemProtocol> mountItem in mountItems) {
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[mountItem executeWithRegistry:_componentViewRegistry];
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}
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[self.delegate mountingManager:self didMountComponentsWithRootTag:rootTag];
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}
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@end
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