84 lines
2.7 KiB
Swift
84 lines
2.7 KiB
Swift
//
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// CustomEmojiPickerInputViewModel.swift
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// Mastodon
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//
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// Created by MainasuK Cirno on 2021-3-25.
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//
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import UIKit
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import Combine
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import MetaTextKit
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import MastodonCore
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import MastodonUI
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final class CustomEmojiPickerInputViewModel {
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var disposeBag = Set<AnyCancellable>()
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private var customEmojiReplaceableTextInputReferences: [CustomEmojiReplaceableTextInputReference] = []
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// input
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weak var customEmojiPickerInputView: CustomEmojiPickerInputView?
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// output
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let isCustomEmojiComposing = CurrentValueSubject<Bool, Never>(false)
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}
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extension CustomEmojiPickerInputViewModel {
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private func removeEmptyReferences() {
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customEmojiReplaceableTextInputReferences.removeAll(where: { element in
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element.value == nil
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})
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}
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func append(customEmojiReplaceableTextInput textInput: CustomEmojiReplaceableTextInput) {
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removeEmptyReferences()
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let isContains = customEmojiReplaceableTextInputReferences.contains(where: { element in
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element.value === textInput
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})
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guard !isContains else {
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return
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}
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customEmojiReplaceableTextInputReferences.append(CustomEmojiReplaceableTextInputReference(value: textInput))
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}
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func insertText(_ text: String) -> CustomEmojiReplaceableTextInputReference? {
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removeEmptyReferences()
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for reference in customEmojiReplaceableTextInputReferences {
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guard let textInput = reference.value else { continue }
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guard textInput.isFirstResponder == true else { continue }
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guard let selectedTextRange = textInput.selectedTextRange else { continue }
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textInput.insertText(text)
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// due to insert text render as attachment
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// the cursor reset logic not works
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// hack with hard code +2 offset
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assert(text.hasSuffix(": "))
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guard text.hasPrefix(":") && text.hasSuffix(": ") else { continue }
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if let _ = textInput as? MetaTextView {
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if let newPosition = textInput.position(from: selectedTextRange.start, offset: 2) {
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let newSelectedTextRange = textInput.textRange(from: newPosition, to: newPosition)
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textInput.selectedTextRange = newSelectedTextRange
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}
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} else {
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if let newPosition = textInput.position(from: selectedTextRange.start, offset: text.length) {
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let newSelectedTextRange = textInput.textRange(from: newPosition, to: newPosition)
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textInput.selectedTextRange = newSelectedTextRange
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}
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}
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return reference
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}
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return nil
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}
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}
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