Implement the rest

app/lib/pages/home_page.dart

@@ -103,6 +103,7 @@ class _HomePageState extends State<HomePage> {
               focusNode: _focusNode,
               autoFocus: false,
               readOnly: false,
+              placeholder: 'Add content',
               enableInteractiveSelection: true,
               expands: false,
               padding: EdgeInsets.zero,

lib/models/documents/attribute.dart

@@ -24,6 +24,7 @@ class Attribute<T> {
     Attribute.link.key: Attribute.link,
     Attribute.color.key: Attribute.color,
     Attribute.background.key: Attribute.background,
+    Attribute.placeholder.key: Attribute.placeholder,
     Attribute.header.key: Attribute.header,
     Attribute.indent.key: Attribute.indent,
     Attribute.align.key: Attribute.align,
@@ -53,6 +54,8 @@ class Attribute<T> {
 
   static final BackgroundAttribute background = BackgroundAttribute(null);
 
+  static final PlaceholderAttribute placeholder = PlaceholderAttribute();
+
   static final HeaderAttribute header = HeaderAttribute();
 
   static final IndentAttribute indent = IndentAttribute();
@@ -78,7 +81,8 @@ class Attribute<T> {
     Attribute.strikeThrough.key,
     Attribute.link.key,
     Attribute.color.key,
-    Attribute.background.key
+    Attribute.background.key,
+    Attribute.placeholder.key,
   };
 
   static final Set<String> blockKeys = {
@@ -222,6 +226,11 @@ class BackgroundAttribute extends Attribute<String> {
       : super('background', AttributeScope.INLINE, val);
 }
 
+/// This is custom attribute for hint
+class PlaceholderAttribute extends Attribute<bool> {
+  PlaceholderAttribute() : super('placeholder', AttributeScope.INLINE, true);
+}
+
 class HeaderAttribute extends Attribute<int> {
   HeaderAttribute({int level}) : super('header', AttributeScope.BLOCK, level);
 }

lib/widgets/editor.dart

@@ -134,6 +134,7 @@ class QuillEditor extends StatefulWidget {
   final bool autoFocus;
   final bool showCursor;
   final bool readOnly;
+  final String placeholder;
   final bool enableInteractiveSelection;
   final double minHeight;
   final double maxHeight;
@@ -154,6 +155,7 @@ class QuillEditor extends StatefulWidget {
       @required this.autoFocus,
       this.showCursor,
       @required this.readOnly,
+      this.placeholder,
       this.enableInteractiveSelection,
       this.minHeight,
       this.maxHeight,
@@ -256,6 +258,7 @@ class _QuillEditorState extends State<QuillEditor>
           widget.scrollable,
           widget.padding,
           widget.readOnly,
+          widget.placeholder,
           widget.onLaunchUrl,
           ToolbarOptions(
             copy: true,

lib/widgets/raw_editor.dart

@@ -1,3 +1,5 @@
+import 'dart:convert';
+
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/foundation.dart';
 import 'package:flutter/gestures.dart';
@@ -32,6 +34,7 @@ class RawEditor extends StatefulWidget {
   final bool scrollable;
   final EdgeInsetsGeometry padding;
   final bool readOnly;
+  final String placeholder;
   final ValueChanged<String> onLaunchUrl;
   final ToolbarOptions toolbarOptions;
   final bool showSelectionHandles;
@@ -58,6 +61,7 @@ class RawEditor extends StatefulWidget {
       this.scrollable,
       this.padding,
       this.readOnly,
+      this.placeholder,
       this.onLaunchUrl,
       this.toolbarOptions,
       this.showSelectionHandles,
@@ -505,7 +509,8 @@ class RawEditorState extends EditorState
 
     Document _doc = widget.controller.document;
     if (_doc.isEmpty() && !widget.focusNode.hasFocus) {
-      _doc = Document()..insert(0, 'Place Holder');
+      _doc = Document.fromJson(jsonDecode(
+          '[{"insert":"${widget.placeholder}"},{"attributes":{"placeholder":true},"insert":"\\n"}]'));
     }
 
     Widget child = CompositedTransformTarget(
@@ -699,10 +704,6 @@ class RawEditorState extends EditorState
         ? defaultStyles.merge(parentStyles)
         : defaultStyles;
 
-    if (widget.controller.document.isEmpty()) {
-      _styles.merge(DefaultStyles(paragraph: defaultStyles.placeHolder));
-    }
-
     if (widget.customStyles != null) {
       _styles = _styles.merge(widget.customStyles);
     }

lib/widgets/text_line.dart

@@ -88,6 +88,11 @@ class TextLine extends StatelessWidget {
 
     TextStyle textStyle = TextStyle();
 
+    if (line.style.containsKey(Attribute.placeholder.key)) {
+      textStyle = defaultStyles.placeHolder.style;
+      return TextSpan(children: children, style: textStyle);
+    }
+
     Attribute header = line.style.attributes[Attribute.header.key];
     Map<Attribute, TextStyle> m = {
       Attribute.h1: defaultStyles.h1.style,