Give each Note a title

We're moving away from being a Journal Editor to being a Note Editor. I
don't want to discard the Journaling parts, as Journaling is really a
subset of Note Taking - so in the future it would be nice if this could
be somehow toggled.

Maybe each Folder can have different display settings. Probably in the
"pro" version.

lib/core/note.dart

@@ -20,6 +20,7 @@ class Note with ChangeNotifier implements Comparable<Note> {
   NotesFolder parent;
   String _filePath;
 
+  String _title = "";
   DateTime _created;
   DateTime _modified;
   NoteData _data = NoteData();
@@ -86,6 +87,21 @@ class Note with ChangeNotifier implements Comparable<Note> {
     notifyListeners();
   }
 
+  String get title {
+    return _title;
+  }
+
+  set title(String title) {
+    _title = title;
+
+    if (_title.isEmpty) {
+      _data.props.remove('title');
+    } else {
+      _data.props['title'] = title;
+    }
+    notifyListeners();
+  }
+
   NoteData get data {
     return _data;
   }
@@ -99,6 +115,9 @@ class Note with ChangeNotifier implements Comparable<Note> {
     if (data.props.containsKey("modified")) {
       _modified = parseDateTime(data.props['modified'].toString());
     }
+    if (data.props.containsKey("title")) {
+      _title = data.props['title'].toString();
+    }
 
     _created ??= DateTime(0, 0, 0, 0, 0, 0, 0, 0);
     notifyListeners();

lib/screens/journal_browsing.dart

@@ -49,7 +49,7 @@ class JournalBrowsingScreenState extends State<JournalBrowsingScreen> {
 
     return Scaffold(
       appBar: AppBar(
-        title: const Text('TIMELINE'),
+        title: const Text('BROWSE'),
         actions: <Widget>[
           IconButton(
             icon: Icon(Icons.delete),
@@ -124,6 +124,9 @@ class NoteViewer extends StatelessWidget {
   final Note note;
   const NoteViewer({Key key, @required this.note}) : super(key: key);
 
+  final bool showJournalHeader = false;
+  final bool showTitle = true;
+
   @override
   Widget build(BuildContext context) {
     ThemeData theme = Theme.of(context);
@@ -137,11 +140,17 @@ class NoteViewer extends StatelessWidget {
     var view = SingleChildScrollView(
       child: Column(
         children: <Widget>[
-          note.hasValidDate() ? JournalEditorHeader(note) : Container(),
-          MarkdownBody(
+          if (note.hasValidDate() && showJournalHeader)
+            JournalEditorHeader(note),
+          if (showTitle && note.title.isNotEmpty)
+            NoteTitleHeader(note.title),
+          Padding(
+            padding: const EdgeInsets.only(top: 8.0, bottom: 8.0),
+            child: MarkdownBody(
               data: note.body,
               styleSheet: MarkdownStyleSheet.fromTheme(theme),
             ),
+          ),
           const SizedBox(height: 64.0),
           // _buildFooter(context),
         ],
@@ -179,3 +188,17 @@ class NoteViewer extends StatelessWidget {
   }
   */
 }
+
+class NoteTitleHeader extends StatelessWidget {
+  final String header;
+  NoteTitleHeader(this.header);
+
+  @override
+  Widget build(BuildContext context) {
+    var textTheme = Theme.of(context).textTheme;
+    return Padding(
+      padding: const EdgeInsets.only(top: 8.0, bottom: 8.0),
+      child: Text(header, style: textTheme.title),
+    );
+  }
+}

lib/screens/journal_editor.dart

@@ -29,20 +29,27 @@ class JournalEditorState extends State<JournalEditor> {
   Note note;
   final bool newNote;
   TextEditingController _textController = TextEditingController();
+  TextEditingController _titleTextController = TextEditingController();
+
   bool rawEditor = false;
   final serializer = MarkdownYAMLSerializer();
 
+  final bool journalMode = false;
+  final bool showTitle = true;
+
   JournalEditorState.newNote(NotesFolder folder) : newNote = true {
     note = Note.newNote(folder);
   }
 
   JournalEditorState.fromNote(this.note) : newNote = false {
     _textController = TextEditingController(text: note.body);
+    _titleTextController = TextEditingController(text: note.title);
   }
 
   @override
   void dispose() {
     _textController.dispose();
+    _titleTextController.dispose();
     super.dispose();
   }
 
@@ -50,7 +57,8 @@ class JournalEditorState extends State<JournalEditor> {
   Widget build(BuildContext context) {
     Widget editor = Column(
       children: <Widget>[
-        JournalEditorHeader(note),
+        if (journalMode) JournalEditorHeader(note),
+        if (showTitle && !rawEditor) NoteTitleEditor(_titleTextController),
         NoteMarkdownEditor(_textController, false),
       ],
     );
@@ -82,11 +90,13 @@ class JournalEditorState extends State<JournalEditor> {
                   }
                   break;
                 case NoteEditorDropDownChoices.SwitchEditor:
+                  note.title = _titleTextController.text.trim();
                   setState(() {
                     if (rawEditor) {
                       rawEditor = false;
                       note.data = serializer.decode(_textController.text);
                       _textController.text = note.body;
+                      _titleTextController.text = note.title;
                     } else {
                       rawEditor = true;
                       var noteData =
@@ -158,14 +168,15 @@ class JournalEditorState extends State<JournalEditor> {
 
   bool _noteModified() {
     var noteContent = _textController.text.trim();
-    if (noteContent.isEmpty) {
+    var titleContent = _titleTextController.text.trim();
+    if (noteContent.isEmpty && titleContent.isEmpty) {
       return false;
     }
     if (note != null) {
       if (rawEditor) {
         return serializer.encode(note.data) != noteContent;
       } else {
-        return noteContent != note.body;
+        return noteContent != note.body || titleContent != note.title;
       }
     }
 
@@ -177,7 +188,8 @@ class JournalEditorState extends State<JournalEditor> {
 
     final stateContainer = StateContainer.of(context);
     if (rawEditor == false) {
-      note.body = _textController.text;
+      note.body = _textController.text.trim();
+      note.title = _titleTextController.text.trim();
     } else {
       note.data = serializer.decode(_textController.text);
     }
@@ -209,6 +221,33 @@ class NoteMarkdownEditor extends StatelessWidget {
       decoration: InputDecoration(
         hintText: 'Write here',
         border: InputBorder.none,
+        isDense: true,
+      ),
+      controller: textController,
+      textCapitalization: TextCapitalization.sentences,
+      scrollPadding: const EdgeInsets.all(0.0),
+    );
+  }
+}
+
+class NoteTitleEditor extends StatelessWidget {
+  final TextEditingController textController;
+
+  NoteTitleEditor(this.textController);
+
+  @override
+  Widget build(BuildContext context) {
+    var style = Theme.of(context).textTheme.title;
+
+    return TextField(
+      autofocus: false,
+      keyboardType: TextInputType.text,
+      maxLines: 1,
+      style: style,
+      decoration: InputDecoration(
+        hintText: 'Title',
+        border: InputBorder.none,
+        isDense: true,
       ),
       controller: textController,
       textCapitalization: TextCapitalization.sentences,