PDF_Office/PDF Office/PDF Master/Class/PDFTools/Compare/View/CompareFilesView/KMCompareFilesView.swift

//
//  KMCompareFilesView.swift
//  PDF Reader Pro
//
//  Created by lizhe on 2023/11/15.
//

import Cocoa

typealias KMCompareFilesViewDragEnteredCallBack = (Bool) -> Void
typealias KMCompareFilesViewDragSuccessCallBack = (String) -> Void
typealias KMCompareFilesViewMouseUpCallBack = (KMCompareFilesView) -> Void

class KMCompareFilesView: NSView {

    var dragEnteredBlock: KMCompareFilesViewDragEnteredCallBack?
    var dragSuccessBlock: KMCompareFilesViewDragSuccessCallBack?
    var mouseUpBack: KMCompareFilesViewMouseUpCallBack?

    override func awakeFromNib() {
        super.awakeFromNib()
        registerForDraggedTypes([NSPasteboard.PasteboardType.fileURL])
    }

    override func draggingExited(_ sender: NSDraggingInfo?) {
        if let block = dragEnteredBlock {
            block(false)
        }
    }

    override func draggingEntered(_ sender: NSDraggingInfo) -> NSDragOperation {
        if let block = dragEnteredBlock {
            block(true)
        }

        guard let pboard = sender.draggingPasteboard.propertyList(forType: NSPasteboard.PasteboardType.fileURL) as? [String: Any],
              let fileNames = pboard[NSPasteboard.PasteboardType.fileURL.rawValue] as? [String],
              let path = fileNames.first, (path as NSString).pathExtension.lowercased() == "pdf" else {
            self.layer?.borderColor = NSColor.clear.cgColor
            return []
        }

        return NSDragOperation.copy
    }

    override func prepareForDragOperation(_ sender: NSDraggingInfo) -> Bool {
        guard let pboard = sender.draggingPasteboard.propertyList(forType: NSPasteboard.PasteboardType.fileURL) as? [String: Any],
              let fileNames = pboard[NSPasteboard.PasteboardType.fileURL.rawValue] as? [String],
              let path = fileNames.first, (path as NSString).pathExtension.lowercased() == "pdf" else {
            return false
        }

        if let block = dragSuccessBlock {
            block(path)
        }

        return true
    }

    override func mouseUp(with event: NSEvent) {
        super.mouseUp(with: event)
        if let block = mouseUpBack {
            block(self)
        }
    }
}