89 lines
2.8 KiB
Swift
89 lines
2.8 KiB
Swift
//
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// Operators.swift
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// RxExample
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//
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// Created by Krunoslav Zaher on 12/6/15.
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// Copyright © 2015 Krunoslav Zaher. All rights reserved.
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//
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import Foundation
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#if !RX_NO_MODULE
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import RxSwift
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import RxCocoa
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#endif
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import UIKit
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// Two way binding operator between control property and variable, that's all it takes {
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infix operator <-> {
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}
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func nonMarkedText(textInput: UITextInput) -> String? {
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let start = textInput.beginningOfDocument
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let end = textInput.endOfDocument
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guard let rangeAll = textInput.textRangeFromPosition(start, toPosition: end),
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text = textInput.textInRange(rangeAll) else {
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return nil
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}
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guard let markedTextRange = textInput.markedTextRange else {
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return text
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}
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guard let startRange = textInput.textRangeFromPosition(start, toPosition: markedTextRange.start),
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endRange = textInput.textRangeFromPosition(markedTextRange.end, toPosition: end) else {
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return text
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}
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return (textInput.textInRange(startRange) ?? "") + (textInput.textInRange(endRange) ?? "")
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}
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func <-> (textInput: RxTextInput, variable: Variable<String>) -> Disposable {
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let bindToUIDisposable = variable.asObservable()
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.bindTo(textInput.rx_text)
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let bindToVariable = textInput.rx_text
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.subscribe(onNext: { [weak textInput] n in
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guard let textInput = textInput else {
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return
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}
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let nonMarkedTextValue = nonMarkedText(textInput)
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if nonMarkedTextValue != variable.value {
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variable.value = nonMarkedTextValue ?? ""
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}
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}, onCompleted: {
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bindToUIDisposable.dispose()
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})
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return StableCompositeDisposable.create(bindToUIDisposable, bindToVariable)
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}
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func <-> <T>(property: ControlProperty<T>, variable: Variable<T>) -> Disposable {
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if T.self == String.self {
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#if DEBUG
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fatalError("It is ok to delete this message, but this is here to warn that you are maybe trying to bind to some `rx_text` property directly to variable.\n" +
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"That will usually work ok, but for some languages that use IME, that simplistic method could cause unexpected issues because it will return intermediate results while text is being inputed.\n" +
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"REMEDY: Just use `textField <-> variable` instead of `textField.rx_text <-> variable`.\n" +
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"Find out more here: https://github.com/ReactiveX/RxSwift/issues/649\n"
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)
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#endif
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}
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let bindToUIDisposable = variable.asObservable()
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.bindTo(property)
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let bindToVariable = property
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.subscribe(onNext: { n in
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variable.value = n
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}, onCompleted: {
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bindToUIDisposable.dispose()
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})
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return StableCompositeDisposable.create(bindToUIDisposable, bindToVariable)
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}
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// }
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