mastodon-app-ufficiale-ipho.../MastodonSDK/Sources/MastodonUI/Scene/ComposeContent/EmojiPicker/CustomEmojiPickerInputViewM...

96 lines
3.3 KiB
Swift

//
// CustomEmojiPickerInputViewModel.swift
// Mastodon
//
// Created by MainasuK Cirno on 2021-3-25.
//
import UIKit
import Combine
import MetaTextKit
import MastodonCore
final class CustomEmojiPickerInputViewModel {
var disposeBag = Set<AnyCancellable>()
private var customEmojiReplaceableTextInputReferences: [CustomEmojiReplaceableTextInputReference] = []
// input
weak var customEmojiPickerInputView: CustomEmojiPickerInputView?
@Published var isCustomEmojiComposing = false
}
extension CustomEmojiPickerInputViewModel {
private func removeEmptyReferences() {
customEmojiReplaceableTextInputReferences.removeAll(where: { element in
element.value == nil
})
}
func append(customEmojiReplaceableTextInput textInput: CustomEmojiReplaceableTextInput) {
removeEmptyReferences()
let isContains = customEmojiReplaceableTextInputReferences.contains(where: { element in
element.value === textInput
})
guard !isContains else {
return
}
customEmojiReplaceableTextInputReferences.append(CustomEmojiReplaceableTextInputReference(value: textInput))
}
func insertText(_ text: String) -> CustomEmojiReplaceableTextInputReference? {
removeEmptyReferences()
for reference in customEmojiReplaceableTextInputReferences {
guard let textInput = reference.value else { continue }
guard textInput.isFirstResponder == true else { continue }
// guard let selectedTextRange = textInput.selectedTextRange else { continue }
textInput.insertText(text)
// FIXME: inline emoji
// due to insert text render as attachment
// the cursor reset logic not works
// hack with hard code +2 offset
// assert(text.hasSuffix(": "))
// guard text.hasPrefix(":") && text.hasSuffix(": ") else { continue }
//
// if let _ = textInput as? MetaTextView {
// if let newPosition = textInput.position(from: selectedTextRange.start, offset: 2) {
// let newSelectedTextRange = textInput.textRange(from: newPosition, to: newPosition)
// textInput.selectedTextRange = newSelectedTextRange
// }
// } else {
// if let newPosition = textInput.position(from: selectedTextRange.start, offset: text.length) {
// let newSelectedTextRange = textInput.textRange(from: newPosition, to: newPosition)
// textInput.selectedTextRange = newSelectedTextRange
// }
// }
return reference
}
return nil
}
}
extension CustomEmojiPickerInputViewModel {
public func configure(textInput: CustomEmojiReplaceableTextInput) {
$isCustomEmojiComposing
.receive(on: DispatchQueue.main)
.sink { [weak self] isCustomEmojiComposing in
guard let self = self else { return }
textInput.inputView = isCustomEmojiComposing ? self.customEmojiPickerInputView : nil
textInput.reloadInputViews()
self.append(customEmojiReplaceableTextInput: textInput)
}
.store(in: &disposeBag)
}
}