119 lines
3.9 KiB
Swift
119 lines
3.9 KiB
Swift
//
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// RxCollectionViewDataSourceProxy.swift
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// RxCocoa
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//
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// Created by Krunoslav Zaher on 6/29/15.
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// Copyright © 2015 Krunoslav Zaher. All rights reserved.
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//
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#if os(iOS) || os(tvOS)
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import Foundation
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import UIKit
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#if !RX_NO_MODULE
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import RxSwift
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#endif
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let collectionViewDataSourceNotSet = CollectionViewDataSourceNotSet()
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class CollectionViewDataSourceNotSet
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: NSObject
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, UICollectionViewDataSource {
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func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
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rxAbstractMethodWithMessage(dataSourceNotSet)
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}
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// The cell that is returned must be retrieved from a call to -dequeueReusableCellWithReuseIdentifier:forIndexPath:
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func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
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rxAbstractMethodWithMessage(dataSourceNotSet)
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}
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}
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/**
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For more information take a look at `DelegateProxyType`.
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*/
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public class RxCollectionViewDataSourceProxy
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: DelegateProxy
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, UICollectionViewDataSource
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, DelegateProxyType {
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/**
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Typed parent object.
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*/
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public weak private(set) var collectionView: UICollectionView?
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private weak var _requiredMethodsDataSource: UICollectionViewDataSource? = collectionViewDataSourceNotSet
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/**
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Initializes `RxCollectionViewDataSourceProxy`
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- parameter parentObject: Parent object for delegate proxy.
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*/
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public required init(parentObject: AnyObject) {
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self.collectionView = (parentObject as! UICollectionView)
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super.init(parentObject: parentObject)
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}
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// MARK: delegate
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/**
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Required delegate method implementation.
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*/
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public func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
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return (_requiredMethodsDataSource ?? collectionViewDataSourceNotSet).collectionView(collectionView, numberOfItemsInSection: section) ?? 0
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}
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/**
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Required delegate method implementation.
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*/
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public func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
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return (_requiredMethodsDataSource ?? collectionViewDataSourceNotSet).collectionView(collectionView, cellForItemAtIndexPath: indexPath)
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}
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// MARK: proxy
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/**
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For more information take a look at `DelegateProxyType`.
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*/
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public override class func createProxyForObject(object: AnyObject) -> AnyObject {
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let collectionView = (object as! UICollectionView)
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return castOrFatalError(collectionView.rx_createDataSourceProxy())
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}
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/**
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For more information take a look at `DelegateProxyType`.
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*/
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public override class func delegateAssociatedObjectTag() -> UnsafePointer<Void> {
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return _pointer(&dataSourceAssociatedTag)
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}
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/**
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For more information take a look at `DelegateProxyType`.
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*/
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public class func setCurrentDelegate(delegate: AnyObject?, toObject object: AnyObject) {
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let collectionView: UICollectionView = castOrFatalError(object)
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collectionView.dataSource = castOptionalOrFatalError(delegate)
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}
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/**
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For more information take a look at `DelegateProxyType`.
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*/
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public class func currentDelegateFor(object: AnyObject) -> AnyObject? {
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let collectionView: UICollectionView = castOrFatalError(object)
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return collectionView.dataSource
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}
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/**
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For more information take a look at `DelegateProxyType`.
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*/
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public override func setForwardToDelegate(forwardToDelegate: AnyObject?, retainDelegate: Bool) {
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let requiredMethodsDataSource: UICollectionViewDataSource? = castOptionalOrFatalError(forwardToDelegate)
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_requiredMethodsDataSource = requiredMethodsDataSource ?? collectionViewDataSourceNotSet
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super.setForwardToDelegate(forwardToDelegate, retainDelegate: retainDelegate)
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}
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}
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#endif
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