kmpdfkit_demo/lib/widgets/viewer/pdfsearch/cpdf_search_toolbar.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.

import 'package:compdfkit_flutter/core/cpdf_view_ctrl.dart';
import 'package:compdfkit_flutter/core/document/textsearcher/cpdf_search_data.dart';
import 'package:compdfkit_flutter/core/document/textsearcher/cpdf_text_searcher.dart';
import 'package:compdfkit_flutter/widgets/common/views/cpdf_action_widget.dart';
import 'package:compdfkit_flutter/widgets/viewer/pdfsearch/cpdf_search_result_list_page.dart';
import 'package:flutter/material.dart';

import '../../../common/util/Strings.dart';
import '../../../common/util/cpdf_keyboard_util.dart';
import '../../../theme/themes.dart';

class CPDFSearchToolbar extends StatefulWidget {
  final bool isDark;

  final CPDFViewCtrl ctrl;

  final VoidCallback? onBack;

  const CPDFSearchToolbar(
      {Key? key, this.isDark = false, required this.ctrl, this.onBack})
      : super(key: key);

  @override
  State<CPDFSearchToolbar> createState() => _CPDFSearchToolbarState();
}

class _CPDFSearchToolbarState extends State<CPDFSearchToolbar> {
  final TextEditingController _textEditingController = TextEditingController();

  bool _hasSearchResult = false;

  String _keyword = '';

  @override
  void dispose() {
    super.dispose();
    _textEditingController.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Theme(
        data: widget.isDark
            ? comPDFKitDarkTheme
            : comPDFKitLightTheme.copyWith(
                colorScheme: comPDFKitLightTheme.colorScheme
                    .copyWith(primary: const Color(0xFFFAFCFF))),
        child: Builder(builder: (context) {
          return AppBar(
            leading: IconButton(
              onPressed: widget.onBack,
              icon: Icon(Icons.arrow_back,
                  color: Theme.of(context).colorScheme.onBackground),
            ),
            title: TextField(
              controller: _textEditingController,
              style: Theme.of(context).textTheme.titleMedium,

              decoration: const InputDecoration(
                focusedBorder: UnderlineInputBorder(
                    borderSide: BorderSide(color: Colors.transparent, width: 0)
                ),
                enabledBorder: UnderlineInputBorder(
                    borderSide: BorderSide(color: Colors.transparent, width: 0)),
                hintText: Strings.Search,
                hintStyle: TextStyle(color: Color(0xFFCCCCCC), fontSize: 18),
              ),
              maxLines: 1,
              textInputAction: TextInputAction.search,
              autofocus: false,
              onEditingComplete: () async {
                _keyword = _textEditingController.text;
                if (_textEditingController.text.isNotEmpty) {
                  CPDFKeyboardUtils.hideKeyShowUnfocused();
                  CPDFTextSearcher textSearcher =
                      widget.ctrl.document.textSearcher;
                  var data = await textSearcher.searchFirst(
                      keywords: _textEditingController.text);
                  if (data != null) {
                    textSearcher.searchBegin(
                        pageIndex: data.pageIndex,
                        textRangeIndex: data.textRangeIndex);
                  }
                  setState(() {
                    _hasSearchResult = data != null;
                  });
                }
              },
            ),
            titleSpacing: 10,
            elevation: 2,
            actions: [
              if (_hasSearchResult) ...{
                CPDFActionWidget(
                  image: 'assets/images/ic_arrow_search_backward.png',
                  onPressed: (context) {
                    widget.ctrl.document.textSearcher.searchBackward();
                  },
                ),
                CPDFActionWidget(
                  image: 'assets/images/ic_arrow_search_forward.png',
                  onPressed: (context) {
                    widget.ctrl.document.textSearcher.searchForward();
                  },
                ),
                CPDFActionWidget(
                  image: 'assets/images/ic_searchlist.png',
                  onPressed: (context) async {
                    CPDFSearchData? data = await Navigator.push(context,
                        MaterialPageRoute(builder: (_) {
                      return CPDFSearchResultListPage(
                          isDark: widget.isDark,
                          document: widget.ctrl.document,
                          keywords: _keyword);
                    }));
                    if (data != null) {
                      widget.ctrl.setDisplayPageIndex(data.pageIndex);
                      widget.ctrl.document.textSearcher.searchBegin(
                          pageIndex: data.pageIndex,
                          textRangeIndex: data.textRangeIndex);
                    }
                  },
                )
              }
            ],
          );
        }));
  }
}