Files
GitJournal/lib/editors/checklist_editor.dart
Vishesh Handa 94f8307315 Fix exceptions
Minor problems because of the null safety migration
2021-05-25 11:04:47 +02:00

464 lines
12 KiB
Dart

// @dart=2.9
import 'dart:async';
import 'dart:io';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:easy_localization/easy_localization.dart';
import 'package:time/time.dart';
import 'package:gitjournal/core/checklist.dart';
import 'package:gitjournal/core/note.dart';
import 'package:gitjournal/editors/common.dart';
import 'package:gitjournal/editors/disposable_change_notifier.dart';
import 'package:gitjournal/editors/note_title_editor.dart';
class ChecklistEditor extends StatefulWidget implements Editor {
final Note note;
final bool noteModified;
@override
final NoteCallback noteDeletionSelected;
@override
final NoteCallback noteEditorChooserSelected;
@override
final NoteCallback exitEditorSelected;
@override
final NoteCallback renameNoteSelected;
@override
final NoteCallback editTagsSelected;
@override
final NoteCallback moveNoteToFolderSelected;
@override
final NoteCallback discardChangesSelected;
final bool editMode;
ChecklistEditor({
Key key,
@required this.note,
@required this.noteModified,
@required this.noteDeletionSelected,
@required this.noteEditorChooserSelected,
@required this.exitEditorSelected,
@required this.renameNoteSelected,
@required this.editTagsSelected,
@required this.moveNoteToFolderSelected,
@required this.discardChangesSelected,
@required this.editMode,
}) : super(key: key);
@override
ChecklistEditorState createState() {
return ChecklistEditorState();
}
}
class ChecklistEditorState extends State<ChecklistEditor>
with DisposableChangeNotifier
implements EditorState {
Checklist checklist;
var focusNodes = <UniqueKey, FocusScopeNode>{};
var keys = <UniqueKey, ChecklistItem>{};
var _titleTextController = TextEditingController();
bool _noteModified;
@override
void initState() {
super.initState();
_init();
}
void _init() {
var note = widget.note;
_titleTextController = TextEditingController(text: note.title);
checklist = Checklist(note);
_noteModified = widget.noteModified;
if (checklist.items.isEmpty) {
var item = checklist.buildItem(false, "");
checklist.addItem(item);
}
focusNodes = {};
keys = {};
for (var item in checklist.items) {
keys[UniqueKey()] = item;
}
}
@override
void didUpdateWidget(ChecklistEditor oldWidget) {
if (oldWidget.noteModified != widget.noteModified) {
_noteModified = widget.noteModified;
}
if (oldWidget.note != widget.note) {
_init();
}
super.didUpdateWidget(oldWidget);
}
@override
void dispose() {
_titleTextController.dispose();
super.disposeListenables();
super.dispose();
}
UniqueKey _getKey(ChecklistItem item) {
for (var e in keys.entries) {
if (e.value == item) {
return e.key;
}
}
var key = UniqueKey();
keys[key] = item;
return key;
}
FocusScopeNode _getFn(ChecklistItem item) {
var key = _getKey(item);
var fn = focusNodes[key];
if (fn == null) {
fn = FocusScopeNode();
focusNodes[key] = fn;
}
return fn;
}
@override
Widget build(BuildContext context) {
var itemTiles = <Widget>[];
for (var i = 0; i < checklist.items.length; i++) {
var item = checklist.items[i];
var autofocus = widget.editMode && (i == checklist.items.length - 1);
itemTiles.add(_buildTile(item, i, autofocus));
}
itemTiles.add(AddItemButton(
key: UniqueKey(),
onPressed: () {
_noteTextChanged();
setState(() {
var item = checklist.buildItem(false, "");
var fn = _getFn(item);
checklist.addItem(item);
// FIXME: Make this happen on the next build
Timer(50.milliseconds, () {
FocusScope.of(context).requestFocus();
FocusScope.of(context).requestFocus(fn);
});
});
},
));
Widget checklistWidget = ReorderableListView(
children: itemTiles,
onReorder: (int oldIndex, int newIndex) {
_noteTextChanged();
setState(() {
var item = checklist.removeAt(oldIndex);
if (newIndex > oldIndex) {
checklist.insertItem(newIndex - 1, item);
} else {
checklist.insertItem(newIndex, item);
}
});
},
);
var titleEditor = Padding(
padding: const EdgeInsets.fromLTRB(16.0, 16.0, 16.0, 0.0),
child: NoteTitleEditor(_titleTextController, _noteTextChanged),
);
return EditorScaffold(
editor: widget,
editorState: this,
noteModified: _noteModified,
editMode: widget.editMode,
parentFolder: widget.note.parent,
body: Column(
children: <Widget>[
titleEditor,
Expanded(child: FocusScope(child: checklistWidget)),
],
),
onUndoSelected: _undo,
onRedoSelected: _redo,
undoAllowed: false,
redoAllowed: false,
);
}
@override
Note getNote() {
// Remove trailing empty items
while (checklist.items.isNotEmpty) {
var last = checklist.items.last;
if (last.checked == false && last.text.trim().isEmpty) {
checklist.removeAt(checklist.items.length - 1);
} else {
break;
}
}
var note = checklist.note;
note.title = _titleTextController.text.trim();
note.type = NoteType.Checklist;
return note;
}
void _noteTextChanged() {
notifyListeners();
if (_noteModified) return;
setState(() {
_noteModified = true;
});
}
ChecklistItemTile _buildTile(ChecklistItem item, int index, bool autofocus) {
return ChecklistItemTile(
key: UniqueKey(),
item: item,
focusNode: _getFn(item),
autofocus: autofocus,
statusChanged: (bool newVal) {
setState(() {
item.checked = newVal;
});
_noteTextChanged();
},
textChanged: (String newVal) {
item.text = newVal;
_noteTextChanged();
},
itemRemoved: () {
_noteTextChanged();
setState(() {
// Give next item the focus
var nextIndex = index + 1;
if (index >= checklist.items.length - 1) {
nextIndex = index - 1;
}
print("Next focus index $nextIndex");
FocusNode fn;
if (nextIndex >= 0) {
var nextItemForFocus = checklist.items[nextIndex];
fn = _getFn(nextItemForFocus);
print("Giving focus to $nextItemForFocus");
}
var k = _getKey(item);
focusNodes.remove(k);
keys.remove(k);
checklist.removeItem(item);
// FIXME: Make this happen on the next build
Timer(200.milliseconds, () {
if (fn != null) {
FocusScope.of(context).requestFocus();
FocusScope.of(context).requestFocus(fn);
}
});
});
},
itemFinished: () {
_noteTextChanged();
setState(() {
var item = checklist.buildItem(false, "");
var fn = _getFn(item);
checklist.insertItem(index + 1, item);
// FIXME: Make this happen on the next build
Timer(50.milliseconds, () {
print("Asking focus to ${index + 1}");
FocusScope.of(context).requestFocus();
FocusScope.of(context).requestFocus(fn);
});
});
},
);
}
@override
Future<void> addImage(File file) async {
var note = getNote();
await note.addImage(file);
setState(() {
checklist = Checklist(note);
_noteModified = true;
});
}
@override
bool get noteModified => _noteModified;
Future<void> _undo() async {}
Future<void> _redo() async {}
}
typedef TextChangedFunction = void Function(String);
typedef StatusChangedFunction = void Function(bool);
class ChecklistItemTile extends StatefulWidget {
final ChecklistItem item;
final StatusChangedFunction statusChanged;
final TextChangedFunction textChanged;
final Function itemRemoved;
final Function itemFinished;
final FocusNode focusNode;
final bool autofocus;
ChecklistItemTile({
Key key,
@required this.item,
@required this.statusChanged,
@required this.textChanged,
@required this.itemRemoved,
@required this.itemFinished,
@required this.focusNode,
this.autofocus = false,
}) : super(key: key);
@override
_ChecklistItemTileState createState() => _ChecklistItemTileState();
}
class _ChecklistItemTileState extends State<ChecklistItemTile> {
TextEditingController _textController;
@override
void initState() {
super.initState();
_textController = TextEditingController(text: widget.item.text);
_textController.addListener(() {
widget.textChanged(_textController.value.text);
});
assert(widget.focusNode != null);
widget.focusNode.addListener(_onFocus);
}
@override
void dispose() {
_textController.dispose();
widget.focusNode.removeListener(_onFocus);
super.dispose();
}
void _onFocus() {
setState(() {}); // rebuild to show/hide close button
}
@override
Widget build(BuildContext context) {
var theme = Theme.of(context);
var style = theme.textTheme.subtitle1;
if (widget.item.checked) {
style = style.copyWith(
decoration: TextDecoration.lineThrough,
color: theme.disabledColor,
);
}
var editor = TextField(
autofocus: widget.autofocus,
focusNode: widget.focusNode,
keyboardType: TextInputType.text,
maxLines: null,
style: style,
textCapitalization: TextCapitalization.sentences,
controller: _textController,
decoration: const InputDecoration(
border: InputBorder.none,
isDense: true,
),
onEditingComplete: widget.itemFinished,
);
return ListTile(
dense: true,
leading: Row(
children: <Widget>[
Container(
height: 24.0,
width: 24.0,
child: const Icon(Icons.drag_handle),
),
const SizedBox(width: 8.0),
SizedBox(
height: 24.0,
width: 24.0,
child: Checkbox(
value: widget.item.checked,
onChanged: widget.statusChanged,
),
),
],
mainAxisSize: MainAxisSize.min,
),
title: editor,
trailing: IconButton(
icon: Icon(widget.focusNode.hasFocus ? Icons.clear : null),
onPressed: widget.itemRemoved,
),
enabled: !widget.item.checked,
);
}
}
class AddItemButton extends StatelessWidget {
final Function onPressed;
AddItemButton({Key key, @required this.onPressed}) : super(key: key);
@override
Widget build(BuildContext context) {
var style = Theme.of(context).textTheme.subtitle1;
var tile = ListTile(
dense: true,
leading: Row(
children: <Widget>[
Container(height: 24.0, width: 24.0),
const SizedBox(width: 8.0),
Container(
padding: const EdgeInsets.all(0.0),
width: 24.0,
child: IconButton(
padding: const EdgeInsets.fromLTRB(0.0, 0.0, 0.0, 0.0),
icon: const Icon(Icons.add),
onPressed: onPressed,
),
),
],
mainAxisSize: MainAxisSize.min,
),
title: Text(tr("editors.checklist.add"), style: style),
);
return GestureDetector(
onTap: onPressed,
child: tile,
);
}
}
// FIXME: The body needs to be scrollable
// FIXME: Support removing an item when pressing backspace
// FIXME: Align the checkbox and close button on top
// FIXME: Move checked items to the bottom?