kmpdfkit_demo/lib/core/document/cpdf_document.dart

import 'dart:convert';
import 'package:compdfkit_flutter/core/document/cpdf_outline_data.dart';
import 'package:compdfkit_flutter/core/document/cpdf_permissions_info.dart';
import 'package:compdfkit_flutter/core/document/textsearcher/cpdf_text_searcher.dart';
import 'package:flutter/services.dart';

import 'cpdf_bookmark.dart';
import 'cpdf_document_error.dart';
import 'cpdf_info.dart';

///  Copyright © 2014-2023 PDF Technologies, Inc. All Rights Reserved.
///
///  THIS SOURCE CODE AND ANY ACCOMPANYING DOCUMENTATION ARE PROTECTED BY INTERNATIONAL COPYRIGHT LAW
///  AND MAY NOT BE RESOLD OR REDISTRIBUTED. USAGE IS BOUND TO THE ComPDFKit LICENSE AGREEMENT.
///  UNAUTHORIZED REPRODUCTION OR DISTRIBUTION IS SUBJECT TO CIVIL AND CRIMINAL PENALTIES.
///  This notice may not be removed from this file.

class CPDFDocument {
  int _viewId = 0;

  late final MethodChannel _methodChannel;

  late final CPDFTextSearcher textSearcher;

  CPDFDocument(this._viewId) {
    _methodChannel =
        MethodChannel('com.compdfkit.flutter.pdfviewer.document.$_viewId');
    textSearcher = CPDFTextSearcher(_methodChannel);
  }

  CPDFDocument.create() : this(1000);

  Future<PDFDocumentError> open(String document, {String password = ''}) async {
    int errorCode = await _methodChannel
        .invokeMethod('openPDF', {'document': document, 'password': password});
    return PDFDocumentError.values
        .firstWhere((element) => element.index == errorCode);
  }

  /// Get the number of pages in a pdf file
  Future<int> getPageCount() async {
    return await _methodChannel.invokeMethod('getPageCount');
  }

  /// Get the page size of the specified page number in the pdf file
  Future<List<double>> getPageSize(int pageIndex) async {
    Map<dynamic, dynamic> map =
        await _methodChannel.invokeMethod('getPageSize', pageIndex);
    return Future(() => [map['width'], map['height']]);
  }

  /// Render the page with the specified page number and return the image
  Future<Uint8List> renderPageAtIndex(
      int pageIndex, int width, int height) async {
    Uint8List imageData = await _methodChannel.invokeMethod('renderPageAtIndex',
        {'pageIndex': pageIndex, 'width': width, 'height': height});
    return imageData;
  }

  Future<List<CPDFOutlineData>> getOutline() async {
    String outlineJson = await _methodChannel.invokeMethod('getOutline');
    List<dynamic> list = json.decode(outlineJson);
    List<CPDFOutlineData> datas = List.empty(growable: true);
    for (var value in list) {
      datas.add(CPDFOutlineData.formJson(value));
    }
    return datas;
  }

  /// Get pdf document information
  /// fileName : xxx.pdf
  /// fileSize : 1024
  /// title : xxx
  /// author : The name of the author of the document
  /// subject :
  /// creator : The name of the creator of the document
  /// producer :
  /// creationDate : Document Creation Timestamp
  /// modificationDate : Timestamp when the document was modified
  /// keywords :
  /// pageCount : Total number of document pages
  /// majorVersion :
  Future<CPDFInfo> getInfo() async {
    String infoJson = await _methodChannel.invokeMethod('getInfo');
    return CPDFInfo.formJson(json.decode(infoJson));
  }

  /// Get document permission information
  Future<CPDFPermissionsInfo> getPermissionsInfo() async {
    String permissionsInfo =
        await _methodChannel.invokeMethod('getPermissionsInfo');
    return CPDFPermissionsInfo.formJson(json.decode(permissionsInfo));
  }

  Future<List<CPDFBookmark>> getBookmarks() async {
    String bookmarkJson = await _methodChannel.invokeMethod('getBookmarks');
    if(bookmarkJson.isNotEmpty){
      List<dynamic> list = json.decode(bookmarkJson);
      return list.map((e) => CPDFBookmark.formJson(e)).toList();
    }else {
      return List.empty(growable: true);
    }
  }

  Future<bool> addBookmark(CPDFBookmark bookmark) async {
    return await _methodChannel.invokeMethod('addBookmark',
        {'title': bookmark.title, 'pageIndex': bookmark.pageIndex});
  }

  Future<bool> removeBookmark(int pageIndex) async {
    return await _methodChannel.invokeMethod('removeBookmark', pageIndex);
  }

  Future<bool> updateBookmark(int pageIndex, String title) async {
    return await _methodChannel.invokeMethod(
        'updateBookmark', {'title': title, 'pageIndex': pageIndex});
  }

  Future<bool> hasBookmark(int pageIndex) async {
    return await _methodChannel.invokeMethod('hasBookmark', pageIndex);
  }
}