html_editor_enhanced_fork_latex 3.1.0

HTML rich text editor for Android, iOS, and Web, using the Summernote library. Enhanced with highly customizable widget-based controls, bug fixes, callbacks, dark mode, and more.

example/lib/main.dart

import 'dart:developer';

import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:flutter_inappwebview/flutter_inappwebview.dart' as inApp;
import 'package:get/get.dart';
import 'package:html_editor_enhanced_fork_latex/html_editor.dart';

void main() => runApp(HtmlEditorExampleApp());

class HtmlEditorExampleApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(),
      darkTheme: ThemeData.dark(),
      home: MyApp2(title: 'Flutter HTML Editor Example'),
      // home: MyApp2(title: 'Flutter HTML Editor Example'),
    );
  }
}

class MyApp2 extends StatefulWidget {
  final String title;

  MyApp2({Key? key, required this.title}) : super(key: key);

  @override
  State<MyApp2> createState() => _MyApp2State();
}

class _MyApp2State extends State<MyApp2> {
  final HtmlEditorController controller1 = HtmlEditorController(
  );
  inApp.InAppWebViewController controller = inApp.InAppWebViewController(0123,inApp.InAppWebView());

  final controller2 = HtmlEditorController();
  @override
  void initState() {
    (_latexToHtml('{x}', controller));
    super.initState();
  }
  Future<String> _latexToHtml(String latex,editorController) async{
    var res =  await editorController!.callAsyncJavaScript(functionBody: r'''
    func(string latex)async{
        const mathlive = await import("https://unpkg.com/mathlive?module");
        const mathML = mathlive.convertLatexToMathMl('\$\$latex\$\$');
        MathMLChannel.postMessage(mathML);
        return(mathML);
    });
    var p = await func();
    return p;
    ''',arguments: {'latex':latex});
    log(res.toString());
    log(res?.toMap().toString()??'');
    return res!.value.toString();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Stack(
        children: [
          SingleChildScrollView(
            child: Column(
              children: [
                tb(controller1),
                tb(controller2),
              ],
            ),
          ),
        ],
      ),
      appBar: AppBar(
        title: Text(this.widget.title),
      ),
    );
  }

  Widget tb(HtmlEditorController controller) {
    var isVisible = false.obs;
    return Column(
        mainAxisAlignment: MainAxisAlignment.center,
        children: <Widget>[
          Obx(
            () => isVisible.value
                ? ToolbarWidget(
                    controller: controller,
                    htmlToolbarOptions: HtmlToolbarOptions(
                      toolbarType: kIsWeb
                          ? ToolbarType.nativeGrid
                          : ToolbarType.nativeScrollable,
                      toolbarPosition: ToolbarPosition
                          .custom, //required to place toolbar anywhere!
                      //other options
                    ),
                    callbacks: null)
                : IconButton(
                    onPressed: () {
                      controller.insertHtml(
                          r'<math><semantics><mrow><mi>y</mi><mi>y</mi></mrow></semantics></>');
                      isVisible.value = true;
                    },
                    icon: Icon(Icons.functions_outlined)),
          ),
          //other widgets here
          HtmlEditor(
            controller: controller,
            callbacks: Callbacks(
              onBlur: () {
                print('onBlur');
                isVisible.value = false;
              },
              onNavigationRequestMobile: (s) async {
                print('on NavReq to $s');
                return NavigationActionPolicy.ALLOW;
              },
              onDialogShown: () => print('onDialogOpen'),
              onFocus: () {
                print('onFocus');
                isVisible.value = true;
              },
            ),
            htmlEditorOptions: HtmlEditorOptions(
              hint: 'Your text here...',
              shouldEnsureVisible: true,
              //initialText: "<p>text content initial, if any</p>",
            ),
            htmlToolbarOptions: HtmlToolbarOptions(
              toolbarPosition:
                  ToolbarPosition.custom, // required to place toolbar anywhere!

              //other options
            ),
            otherOptions: OtherOptions(height: 550),
          ),
        ]);
  }
}

class HtmlEditorExample extends StatefulWidget {
  HtmlEditorExample({Key? key, required this.title}) : super(key: key);

  final String title;

  @override
  _HtmlEditorExampleState createState() => _HtmlEditorExampleState();
}

class _HtmlEditorExampleState extends State<HtmlEditorExample> {
  String result = '';
  final HtmlEditorController controller = HtmlEditorController();

  @override
  Widget build(BuildContext context) {
    return GestureDetector(
      onTap: () {
        if (!kIsWeb) {
          controller.clearFocus();
        }
      },
      child: Scaffold(
        appBar: AppBar(
          title: Text(widget.title),
          elevation: 0,
          actions: [
            IconButton(
                icon: Icon(Icons.refresh),
                onPressed: () {
                  if (kIsWeb) {
                    controller.reloadWeb();
                  } else {
                    controller.editorController!.reload();
                  }
                })
          ],
        ),
        floatingActionButton: FloatingActionButton(
          onPressed: () {
            controller.toggleCodeView();
          },
          child: Text(r'<\>',
              style: TextStyle(fontWeight: FontWeight.bold, fontSize: 18)),
        ),
        body: SingleChildScrollView(
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: <Widget>[
              HtmlEditor(
                controller: controller,
                htmlEditorOptions: HtmlEditorOptions(
                  hint: 'Your text here...',
                  shouldEnsureVisible: true,
                  //initialText: "<p>text content initial, if any</p>",
                ),
                htmlToolbarOptions: HtmlToolbarOptions(
                  toolbarPosition: ToolbarPosition.aboveEditor,
                  //by default
                  toolbarType: ToolbarType.nativeScrollable,
                  //by default

                ),
                otherOptions: OtherOptions(height: 550),
                callbacks: Callbacks(onBeforeCommand: (String? currentHtml) {
                  print('html before change is $currentHtml');
                }, onChangeContent: (String? changed) {
                  print('content changed to $changed');
                }, onChangeCodeview: (String? changed) {
                  print('code changed to $changed');
                }, onChangeSelection: (EditorSettings settings) {
                  print('parent element is ${settings.parentElement}');
                  print('font name is ${settings.fontName}');
                }, onDialogShown: () {
                  print('dialog shown');
                }, onEnter: () {
                  print('enter/return pressed');
                }, onFocus: () {
                  print('editor focused');
                }, onBlur: () {
                  print('editor unfocused');
                }, onBlurCodeview: () {
                  print('codeview either focused or unfocused');
                }, onInit: () {
                  print('init');
                },
                    //this is commented because it overrides the default Summernote handlers
                    /*onImageLinkInsert: (String? url) {
                    print(url ?? "unknown url");
                  },
                  onImageUpload: (FileUpload file) async {
                    print(file.name);
                    print(file.size);
                    print(file.type);
                    print(file.base64);
                  },*/
                    onImageUploadError: (FileUpload? file, String? base64Str,
                        UploadError error) {
                  print((error.name));
                  print(base64Str ?? '');
                  if (file != null) {
                    print(file.name);
                    print(file.size);
                    print(file.type);
                  }
                }, onKeyDown: (int? keyCode) {
                  print('$keyCode key downed');
                  print(
                      'current character count: ${controller.characterCount}');
                }, onKeyUp: (int? keyCode) {
                  print('$keyCode key released');
                }, onMouseDown: () {
                  print('mouse downed');
                }, onMouseUp: () {
                  print('mouse released');
                }, onNavigationRequestMobile: (String url) {
                  print(url);
                  return NavigationActionPolicy.ALLOW;
                }, onPaste: () {
                  print('pasted into editor');
                }, onScroll: () {
                  print('editor scrolled');
                }),
                plugins: [
                  SummernoteAtMention(
                      getSuggestionsMobile: (String value) {
                        var mentions = <String>['test1', 'test2', 'test3'];
                        return mentions
                            .where((element) => element.contains(value))
                            .toList();
                      },
                      mentionsWeb: ['test1', 'test2', 'test3'],
                      onSelect: (String value) {
                        print(value);
                      }),
                ],
              ),
              Padding(
                padding: const EdgeInsets.all(8.0),
                child: Row(
                  mainAxisAlignment: MainAxisAlignment.center,
                  children: <Widget>[
                    TextButton(
                      style: TextButton.styleFrom(
                          backgroundColor: Colors.blueGrey),
                      onPressed: () {
                        controller.undo();
                      },
                      child:
                          Text('Undo', style: TextStyle(color: Colors.white)),
                    ),
                    SizedBox(
                      width: 16,
                    ),
                    TextButton(
                      style: TextButton.styleFrom(
                          backgroundColor: Colors.blueGrey),
                      onPressed: () {
                        controller.clear();
                      },
                      child:
                          Text('Reset', style: TextStyle(color: Colors.white)),
                    ),
                    SizedBox(
                      width: 16,
                    ),
                    TextButton(
                      style: TextButton.styleFrom(
                          backgroundColor:
                              Theme.of(context).colorScheme.secondary),
                      onPressed: () async {
                        var txt = await controller.getHtmlStringWithLatex();
                        if (txt.contains('src=\"data:')) {
                          txt =
                              '<text removed due to base-64 data, displaying the text could cause the app to crash>';
                        }
                        setState(() {
                          result = txt;
                        });
                      },
                      child: Text(
                        'Submit',
                        style: TextStyle(color: Colors.white),
                      ),
                    ),
                    SizedBox(
                      width: 16,
                    ),
                    TextButton(
                      style: TextButton.styleFrom(
                          backgroundColor:
                              Theme.of(context).colorScheme.secondary),
                      onPressed: () {
                        controller.redo();
                      },
                      child: Text(
                        'Redo',
                        style: TextStyle(color: Colors.white),
                      ),
                    ),
                  ],
                ),
              ),
              Padding(
                padding: const EdgeInsets.all(8.0),
                child: Text(result),
              ),
              Padding(
                padding: const EdgeInsets.all(8.0),
                child: Row(
                  mainAxisAlignment: MainAxisAlignment.center,
                  children: <Widget>[
                    TextButton(
                      style: TextButton.styleFrom(
                          backgroundColor: Colors.blueGrey),
                      onPressed: () {
                        controller.disable();
                      },
                      child: Text('Disable',
                          style: TextStyle(color: Colors.white)),
                    ),
                    SizedBox(
                      width: 16,
                    ),
                    TextButton(
                      style: TextButton.styleFrom(
                          backgroundColor:
                              Theme.of(context).colorScheme.secondary),
                      onPressed: () async {
                        controller.enable();
                      },
                      child: Text(
                        'Enable',
                        style: TextStyle(color: Colors.white),
                      ),
                    ),
                  ],
                ),
              ),
              SizedBox(height: 16),
              Padding(
                padding: const EdgeInsets.all(8.0),
                child: Row(
                  mainAxisAlignment: MainAxisAlignment.center,
                  children: <Widget>[
                    TextButton(
                      style: TextButton.styleFrom(
                          backgroundColor:
                              Theme.of(context).colorScheme.secondary),
                      onPressed: () {
                        controller.insertText('Google');
                      },
                      child: Text('Insert Text',
                          style: TextStyle(color: Colors.white)),
                    ),
                    SizedBox(
                      width: 16,
                    ),
                    TextButton(
                      style: TextButton.styleFrom(
                          backgroundColor:
                              Theme.of(context).colorScheme.secondary),
                      onPressed: () {
                        controller.insertHtml(
                            '''<p style="color: blue">Google in blue</p>''');
                      },
                      child: Text('Insert HTML',
                          style: TextStyle(color: Colors.white)),
                    ),
                  ],
                ),
              ),
              Padding(
                padding: const EdgeInsets.all(8.0),
                child: Row(
                  mainAxisAlignment: MainAxisAlignment.center,
                  children: <Widget>[
                    TextButton(
                      style: TextButton.styleFrom(
                          backgroundColor:
                              Theme.of(context).colorScheme.secondary),
                      onPressed: () async {
                        controller.insertLink(
                            'Google linked', 'https://google.com', true);
                      },
                      child: Text(
                        'Insert Link',
                        style: TextStyle(color: Colors.white),
                      ),
                    ),
                    SizedBox(
                      width: 16,
                    ),
                    TextButton(
                      style: TextButton.styleFrom(
                          backgroundColor:
                              Theme.of(context).colorScheme.secondary),
                      onPressed: () {
                        controller.insertNetworkImage(
                            'https://www.google.com/images/branding/googlelogo/2x/googlelogo_color_92x30dp.png',
                            filename: 'Google network image');
                      },
                      child: Text(
                        'Insert network image',
                        style: TextStyle(color: Colors.white),
                      ),
                    ),
                  ],
                ),
              ),
              SizedBox(height: 16),
              Padding(
                padding: const EdgeInsets.all(8.0),
                child: Row(
                  mainAxisAlignment: MainAxisAlignment.center,
                  children: <Widget>[
                    TextButton(
                      style: TextButton.styleFrom(
                          backgroundColor: Colors.blueGrey),
                      onPressed: () {
                        controller.addNotification(
                            'Info notification', NotificationType.info);
                      },
                      child:
                          Text('Info', style: TextStyle(color: Colors.white)),
                    ),
                    SizedBox(
                      width: 16,
                    ),
                    TextButton(
                      style: TextButton.styleFrom(
                          backgroundColor: Colors.blueGrey),
                      onPressed: () {
                        controller.addNotification(
                            'Warning notification', NotificationType.warning);
                      },
                      child: Text('Warning',
                          style: TextStyle(color: Colors.white)),
                    ),
                    SizedBox(
                      width: 16,
                    ),
                    TextButton(
                      style: TextButton.styleFrom(
                          backgroundColor:
                              Theme.of(context).colorScheme.secondary),
                      onPressed: () async {
                        controller.addNotification(
                            'Success notification', NotificationType.success);
                      },
                      child: Text(
                        'Success',
                        style: TextStyle(color: Colors.white),
                      ),
                    ),
                    SizedBox(
                      width: 16,
                    ),
                    TextButton(
                      style: TextButton.styleFrom(
                          backgroundColor:
                              Theme.of(context).colorScheme.secondary),
                      onPressed: () {
                        controller.addNotification(
                            'Danger notification', NotificationType.danger);
                      },
                      child: Text(
                        'Danger',
                        style: TextStyle(color: Colors.white),
                      ),
                    ),
                  ],
                ),
              ),
              SizedBox(height: 16),
              Padding(
                padding: const EdgeInsets.all(8.0),
                child: Row(
                  mainAxisAlignment: MainAxisAlignment.center,
                  children: <Widget>[
                    TextButton(
                      style: TextButton.styleFrom(
                          backgroundColor: Colors.blueGrey),
                      onPressed: () {
                        controller.addNotification('Plaintext notification',
                            NotificationType.plaintext);
                      },
                      child: Text('Plaintext',
                          style: TextStyle(color: Colors.white)),
                    ),
                    SizedBox(
                      width: 16,
                    ),
                    TextButton(
                      style: TextButton.styleFrom(
                          backgroundColor:
                              Theme.of(context).colorScheme.secondary),
                      onPressed: () async {
                        controller.removeNotification();
                      },
                      child: Text(
                        'Remove',
                        style: TextStyle(color: Colors.white),
                      ),
                    ),
                  ],
                ),
              ),
            ],
          ),
        ),
      ),
    );
  }
}