suixinkan_uikit/Pods/IQKeyboardToolbarManager/IQKeyboardToolbarManager/Classes/Toolbar/IQKeyboardToolbarManager+Action.swift

//
//  IQKeyboardToolbarManager+Action.swift
//  https://github.com/hackiftekhar/IQKeyboardToolbarManager
//  Copyright (c) 2013-24 Iftekhar Qurashi.
//
//  Permission is hereby granted, free of charge, to any person obtaining a copy
//  of this software and associated documentation files (the "Software"), to deal
//  in the Software without restriction, including without limitation the rights
//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
//  copies of the Software, and to permit persons to whom the Software is
//  furnished to do so, subject to the following conditions:
//
//  The above copyright notice and this permission notice shall be included in
//  all copies or substantial portions of the Software.
//
//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
//  THE SOFTWARE.

import UIKit
import IQKeyboardCore
import IQKeyboardToolbar

// MARK: Previous next button actions
@available(iOSApplicationExtension, unavailable)
@MainActor
@objc public extension IQKeyboardToolbarManager {

    /**
     Returns YES if can navigate to previous responder textInputView, otherwise NO.
    */
    var canGoPrevious: Bool {
        // If it is not first textInputView. then it's previous object canBecomeFirstResponder.
        guard let textInputView: any IQTextInputView = self.textInputView,
              let textInputViews: [any IQTextInputView] = responderViews(of: textInputView),
              let index: Int = textInputViews.firstIndex(where: { $0 == textInputView }),
              index > 0 else {
            return false
        }
        return true
    }

    /**
     Returns YES if can navigate to next responder textInputViews, otherwise NO.
    */
    var canGoNext: Bool {
        // If it is not first textInputView. then it's previous object canBecomeFirstResponder.
        guard let textInputView: any IQTextInputView = self.textInputView,
              let textInputViews: [any IQTextInputView] = responderViews(of: textInputView),
              let index: Int = textInputViews.firstIndex(where: { $0 == textInputView }),
              index < textInputViews.count-1 else {
            return false
        }
        return true
    }

    /**
     Navigate to previous responder textInputViews
    */
    @discardableResult
    func goPrevious() -> Bool {

        // If it is not first textInputView. then it's previous object becomeFirstResponder.
        guard let textInputView: any IQTextInputView = self.textInputView,
              let textInputViews: [any IQTextInputView] = responderViews(of: textInputView),
              let index: Int = textInputViews.firstIndex(where: { $0 == textInputView }),
              index > 0 else {
            return false
        }

        let nextTextInputView: any IQTextInputView = textInputViews[index-1]

        let isAcceptAsFirstResponder: Bool = nextTextInputView.becomeFirstResponder()

        //  If it refuses then becoming previous textInputView as first responder again.    (Bug ID: #96)
        if !isAcceptAsFirstResponder {
            showLog("Refuses to become first responder: \(nextTextInputView)")
        }

        return isAcceptAsFirstResponder
    }

    /**
     Navigate to next responder textInputView.
    */
    @discardableResult
    func goNext() -> Bool {

        // If it is not first textInputView. then it's previous object becomeFirstResponder.
        guard let textInputView: any IQTextInputView = self.textInputView,
              let textInputViews: [any IQTextInputView] = responderViews(of: textInputView),
              let index: Int = textInputViews.firstIndex(where: { $0 == textInputView }),
              index < textInputViews.count-1 else {
            return false
        }

        let nextTextInputView: any IQTextInputView = textInputViews[index+1]

        let isAcceptAsFirstResponder: Bool = nextTextInputView.becomeFirstResponder()

        //  If it refuses then becoming previous textInputView as first responder again.    (Bug ID: #96)
        if !isAcceptAsFirstResponder {
            showLog("Refuses to become first responder: \(nextTextInputView)")
        }

        return isAcceptAsFirstResponder
    }
}

@available(iOSApplicationExtension, unavailable)
@MainActor
internal extension IQKeyboardToolbarManager {

    /**    previousAction. */
    func previousAction(_ barButton: IQBarButtonItem) {

        // If user wants to play input Click sound.
        if playInputClicks {
            // Play Input Click Sound.
            UIDevice.current.playInputClick()
        }

        guard canGoPrevious,
              let textInputView: any IQTextInputView = self.textInputView else {
            return
        }

        let isAcceptedAsFirstResponder: Bool = goPrevious()

        if isAcceptedAsFirstResponder {
            Self.sendInvokeAction(of: barButton, sender: textInputView)
        }
    }

    /**    nextAction. */
    func nextAction(_ barButton: IQBarButtonItem) {

        // If user wants to play input Click sound.
        if playInputClicks {
            // Play Input Click Sound.
            UIDevice.current.playInputClick()
        }

        guard canGoNext,
              let textInputView: any IQTextInputView = self.textInputView else {
            return
        }

        let isAcceptedAsFirstResponder: Bool = goNext()

        if isAcceptedAsFirstResponder {
            Self.sendInvokeAction(of: barButton, sender: textInputView)
        }
    }

    /**    doneAction. Resigning current textInputView. */
    func doneAction(_ barButton: IQBarButtonItem) {

        // If user wants to play input Click sound.
        if playInputClicks {
            // Play Input Click Sound.
            UIDevice.current.playInputClick()
        }

        guard let textInputView: any IQTextInputView = self.textInputView else {
            return
        }

        // Resign textInputView.
        let isResignedFirstResponder: Bool = textInputView.resignFirstResponder()

        if isResignedFirstResponder {
            Self.sendInvokeAction(of: barButton, sender: textInputView)
        }
    }
}

@available(iOSApplicationExtension, unavailable)
@MainActor
private extension IQKeyboardToolbarManager {
    private static func sendInvokeAction(of barButton: IQBarButtonItem, sender: some IQTextInputView) {
        // Handling search bar special case
        if let searchBar: UISearchBar = sender.iq.textFieldSearchBar() {
            switch barButton {
            case sender.internalToolbar.nextBarButton:
                searchBar.internalToolbar.nextBarButton.invocation?.invoke(from: searchBar)
            case sender.internalToolbar.previousBarButton:
                searchBar.internalToolbar.previousBarButton.invocation?.invoke(from: searchBar)
            case sender.internalToolbar.doneBarButton:
                searchBar.internalToolbar.doneBarButton.invocation?.invoke(from: searchBar)
            default:
                break
            }
        } else {
            barButton.invocation?.invoke(from: sender)
        }
    }
}

@available(iOSApplicationExtension, unavailable)
@MainActor
fileprivate extension IQTextInputView {
    var internalToolbar: IQKeyboardToolbar {
        return iq.toolbar
    }
}