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//
// NCViewerPDFSearch.swift
// Nextcloud
//
// Created by Marino Faggiana on 23/03/2020.
// Copyright © 2020 Marino Faggiana. All rights reserved.
//
// Author Marino Faggiana <marino.faggiana@nextcloud.com>
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//
import UIKit
import PDFKit
@objc protocol NCViewerPDFSearchDelegate: AnyObject {
func searchPdfSelection(_ pdfSelection: PDFSelection)
}
class NCViewerPDFSearch: UITableViewController, UISearchBarDelegate, PDFDocumentDelegate {
var searchBar = UISearchBar()
var pdfDocument: PDFDocument?
var searchResultArray: [PDFSelection] = []
weak var delegate: NCViewerPDFSearchDelegate?
// MARK: - View Life Cycle
override func viewDidLoad() {
super.viewDidLoad()
searchBar.delegate = self
searchBar.sizeToFit()
searchBar.searchBarStyle = .minimal
navigationItem.titleView = searchBar
tableView.dataSource = self
tableView.delegate = self
tableView.register(UINib(nibName: "NCViewerPDFSearchCell", bundle: nil), forCellReuseIdentifier: "Cell")
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
searchBar.becomeFirstResponder()
}
// MARK: - UITableView DataSource / Delegate
override func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
return 82
}
override func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return self.searchResultArray.count
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath) as! NCViewerPDFSearchCell
let pdfSelection = searchResultArray[indexPath.row] as PDFSelection
// if let pdfOutline = pdfDocument?.outlineItem(for: pdfSelection) {
// cell.outlineLabel.text = pdfOutline.label
// }
let pdfPage = pdfSelection.pages.first
let pageNumber = pdfPage?.pageRef?.pageNumber ?? 0
cell.pageNumberLabel.text = NSLocalizedString("_scan_document_pdf_page_", comment: "") + ": " + String(pageNumber)
let extendSelection = pdfSelection.copy() as! PDFSelection
extendSelection.extend(atStart: 10)
extendSelection.extend(atEnd: 90)
extendSelection.extendForLineBoundaries()
let nsRange = NSString(string: extendSelection.string!).range(of: pdfSelection.string!, options: String.CompareOptions.caseInsensitive)
if nsRange.location != NSNotFound {
let attributedSubString = NSAttributedString(string: NSString(string: extendSelection.string!).substring(with: nsRange), attributes: [NSAttributedString.Key.font: UIFont.boldSystemFont(ofSize: 17), NSAttributedString.Key.foregroundColor : UIColor.systemBlue])
let attributedString = NSMutableAttributedString(string: extendSelection.string!)
attributedString.replaceCharacters(in: nsRange, with: attributedSubString)
cell.searchResultTextLabel.attributedText = attributedString
}
return cell
}
override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
let pdfSelection = searchResultArray[indexPath.row]
delegate?.searchPdfSelection(pdfSelection)
dismiss(animated: true)
}
// MARK: - PDFSelection Delegate
func didMatchString(_ instance: PDFSelection) {
searchResultArray.append(instance)
tableView.reloadData()
}
// MARK: - UIScrollView Delegate
override func scrollViewWillBeginDragging(_ scrollView: UIScrollView) {
searchBar.resignFirstResponder()
}
// MARK: - UISearchBarDelegate
func searchBarSearchButtonClicked(_ searchBar: UISearchBar) {
searchBar.resignFirstResponder()
}
func searchBarCancelButtonClicked(_ searchBar: UISearchBar) {
pdfDocument?.cancelFindString()
navigationItem.setRightBarButton(nil, animated: false)
dismiss(animated: true)
}
func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
if searchText.count < 2 { return }
searchResultArray.removeAll()
tableView.reloadData()
pdfDocument?.cancelFindString()
pdfDocument?.delegate = self
pdfDocument?.beginFindString(searchText, withOptions: .caseInsensitive)
}
func searchBarShouldBeginEditing(_ searchBar: UISearchBar) -> Bool {
let cancelBarButtonItem = UIBarButtonItem(title: NSLocalizedString("_cancel_", comment: ""), style: .plain, target: self, action: #selector(cancelBarButtonItemClicked))
navigationItem.setRightBarButton(cancelBarButtonItem, animated: true)
return true
}
@objc func cancelBarButtonItemClicked() {
searchBarCancelButtonClicked(searchBar)
}
}
class NCViewerPDFSearchCell: UITableViewCell {
@IBOutlet weak var outlineLabel: UILabel!
@IBOutlet weak var pageNumberLabel: UILabel!
@IBOutlet weak var searchResultTextLabel: UILabel!
override func awakeFromNib() {
super.awakeFromNib()
}
}
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