Document.save() now returns a Future

 # Changelog
 
-## 1.14.0
+## 2.0.0
 
 - A borderRadius can only be given for a uniform Border
 - Add LayoutWidgetBuilder
@@ -8,6 +8,8 @@
 - Improve internal sructure
 - Add some asserts on the TtfParser
 - Add document loading
+- Remove deprecated methods
+- Document.save() now returns a Future
 
 ## 1.13.0
 

@@ -89,7 +89,7 @@ To save the pdf file:
 //   final output = await getTemporaryDirectory();
 //   final file = File("${output.path}/example.pdf");
 final file = File("example.pdf");
-await file.writeAsBytes(pdf.save());
+await file.writeAsBytes(await pdf.save());
 ```
 
 ## Encryption, Digital Signature, and loading a PDF Document

@@ -2,10 +2,10 @@ import 'dart:io';
 
 import 'package:pdf/widgets.dart' as pw;
 
-void main() {
-  final doc = pw.Document();
+Future<void> main() async {
+  final pdf = pw.Document();
 
-  doc.addPage(
+  pdf.addPage(
     pw.Page(
       build: (pw.Context context) => pw.Center(
         child: pw.Text('Hello World!'),
@@ -14,5 +14,5 @@ void main() {
   );
 
   final file = File('example.pdf');
-  file.writeAsBytesSync(doc.save());
+  await file.writeAsBytes(await pdf.save());
 }

@@ -191,7 +191,7 @@ class PdfDocument {
   bool get hasGraphicStates => _graphicStates != null;
 
   /// This writes the document to an OutputStream.
-  void _write(PdfStream os) {
+  Future<void> _write(PdfStream os) async {
     final pos = PdfOutput(os);
 
     // Write each object to the [PdfStream]. We call via the output
@@ -199,16 +199,16 @@ class PdfDocument {
     objects.forEach(pos.write);
 
     // Finally close the output, which writes the xref table.
-    pos.close();
+    await pos.close();
   }
 
   /// Generate the PDF document as a memory file
-  Uint8List save() {
+  Future<Uint8List> save() async {
     final os = PdfStream();
     if (prev != null) {
       os.putBytes(prev.bytes);
     }
-    _write(os);
+    await _write(os);
     return os.output();
   }
 }

@@ -68,7 +68,7 @@ class PdfOutput {
   }
 
   /// This closes the Stream, writing the xref table
-  void close() {
+  Future<void> close() async {
     final xref = os.offset;
     os.putString('xref\n');
 
@@ -136,7 +136,7 @@ class PdfOutput {
     os.putString('\nstartxref\n$xref\n%%EOF\n');
 
     if (signatureID != null) {
-      signatureID.writeSignature(os);
+      await signatureID.writeSignature(os);
     }
   }
 

@@ -52,17 +52,17 @@ class PdfSignature extends PdfObject {
     _offsetEnd = os.offset;
   }
 
-  void writeSignature(PdfStream os) {
+  Future<void> writeSignature(PdfStream os) async {
     assert(_offsetStart != null && _offsetEnd != null,
         'Must reserve the object space before signing the document');
 
-    crypto.sign(this, os, params, _offsetStart, _offsetEnd);
+    await crypto.sign(this, os, params, _offsetStart, _offsetEnd);
   }
 }
 
 abstract class PdfSignatureBase {
   void preSign(PdfObject object, PdfDict params);
 
-  void sign(PdfObject object, PdfStream os, PdfDict params, int offsetStart,
-      int offsetEnd);
+  Future<void> sign(PdfObject object, PdfStream os, PdfDict params,
+      int offsetStart, int offsetEnd);
 }

@@ -112,13 +112,13 @@ class Document {
     _pages.add(page);
   }
 
-  Uint8List save() {
+  Future<Uint8List> save() async {
     if (!_paint) {
       for (var page in _pages) {
         page.postProcess(this);
       }
       _paint = true;
     }
-    return document.save();
+    return await document.save();
   }
 }

@@ -4,7 +4,7 @@ description: A pdf producer for Dart. It can create pdf files for both web or fl
 homepage: https://github.com/DavBfr/dart_pdf/tree/master/pdf
 repository: https://github.com/DavBfr/dart_pdf
 issue_tracker: https://github.com/DavBfr/dart_pdf/issues
-version: 1.14.0
+version: 2.0.0
 
 environment:
   sdk: ">=2.3.0 <3.0.0"

@@ -20,7 +20,7 @@ import 'package:pdf/pdf.dart';
 import 'package:test/test.dart';
 
 void main() {
-  test('Pdf Annotations', () {
+  test('Pdf Annotations', () async {
     final pdf = PdfDocument();
     final page = PdfPage(pdf, pageFormat: const PdfPageFormat(500, 300));
     final page1 = PdfPage(pdf, pageFormat: const PdfPageFormat(500, 300));
@@ -71,6 +71,6 @@ void main() {
     g.strokePath();
 
     final file = File('annotations.pdf');
-    file.writeAsBytesSync(pdf.save());
+    await file.writeAsBytes(await pdf.save());
   });
 }

@@ -486,8 +486,8 @@ void main() {
     ));
   });
 
-  tearDownAll(() {
+  tearDownAll(() async {
     final file = File('arabic.pdf');
-    file.writeAsBytesSync(pdf.save());
+    await file.writeAsBytes(await pdf.save());
   });
 }

@@ -744,8 +744,8 @@ void main() {
     });
   });
 
-  tearDownAll(() {
+  tearDownAll(() async {
     final file = File('colors.pdf');
-    file.writeAsBytesSync(pdf.save());
+    await file.writeAsBytes(await pdf.save());
   });
 }

@@ -23,7 +23,7 @@ import 'package:test/test.dart';
 import 'package:vector_math/vector_math_64.dart';
 
 void main() {
-  test('Pdf Complex', () {
+  test('Pdf Complex', () async {
     final img = Uint32List(10 * 10);
     img.fillRange(0, img.length - 1, 0x12345678);
 
@@ -96,6 +96,6 @@ void main() {
     }
 
     final file = File('complex.pdf');
-    file.writeAsBytesSync(pdf.save());
+    await file.writeAsBytes(await pdf.save());
   });
 }

@@ -106,9 +106,9 @@ void main() {
     );
   });
 
-  tearDownAll(() {
+  tearDownAll(() async {
     final file = File('jpeg.pdf');
-    file.writeAsBytesSync(pdf.save());
+    await file.writeAsBytes(await pdf.save());
   });
 }
 

@@ -99,7 +99,7 @@ void printMetrics(
 }
 
 void main() {
-  test('Pdf Font Metrics', () {
+  test('Pdf Font Metrics', () async {
     final pdf = Document();
 
     PdfFont.courier(pdf.document);
@@ -126,6 +126,6 @@ void main() {
     }
 
     final file = File('metrics.pdf');
-    file.writeAsBytesSync(pdf.save());
+    await file.writeAsBytes(await pdf.save());
   });
 }

@@ -20,7 +20,7 @@ import 'package:pdf/pdf.dart';
 import 'package:test/test.dart';
 
 void main() {
-  test('Pdf Minimal', () {
+  test('Pdf Minimal', () async {
     final pdf = PdfDocument(compress: false);
     final page = PdfPage(pdf, pageFormat: PdfPageFormat.a4);
 
@@ -30,6 +30,6 @@ void main() {
     g.strokePath();
 
     final file = File('minimal.pdf');
-    file.writeAsBytesSync(pdf.save());
+    await file.writeAsBytes(await pdf.save());
   });
 }

@@ -135,8 +135,8 @@ void main() {
     ));
   });
 
-  tearDownAll(() {
+  tearDownAll(() async {
     final file = File('orientation.pdf');
-    file.writeAsBytesSync(pdf.save());
+    await file.writeAsBytes(await pdf.save());
   });
 }

@@ -46,8 +46,8 @@ void main() {
         build: (Context context) => Text('Hello World!')));
   });
 
-  tearDownAll(() {
+  tearDownAll(() async {
     final file = File('roll-paper.pdf');
-    file.writeAsBytesSync(pdf.save());
+    await file.writeAsBytes(await pdf.save());
   });
 }

@@ -59,7 +59,7 @@ void printTextTtf(
 }
 
 void main() {
-  test('Pdf TrueType', () {
+  test('Pdf TrueType', () async {
     final pdf = PdfDocument();
     final page = PdfPage(pdf, pageFormat: const PdfPageFormat(500, 300));
 
@@ -75,7 +75,7 @@ void main() {
         page, g, '你好 檯號 ', File('genyomintw.ttf'), 30.0 + 30.0 * top++);
 
     final file = File('ttf.pdf');
-    file.writeAsBytesSync(pdf.save());
+    await file.writeAsBytes(await pdf.save());
   });
 
   test('Font SubSetting', () {

@@ -50,7 +50,7 @@ void printText(
 }
 
 void main() {
-  test('Pdf Type1 Embedded Fonts', () {
+  test('Pdf Type1 Embedded Fonts', () async {
     final pdf = PdfDocument();
     final page = PdfPage(pdf, pageFormat: const PdfPageFormat(500, 430));
 
@@ -78,6 +78,6 @@ void main() {
     printText(page, g, s, PdfFont.zapfDingbats(pdf), 20.0 + 30.0 * top++);
 
     final file = File('type1.pdf');
-    file.writeAsBytesSync(pdf.save());
+    await file.writeAsBytes(await pdf.save());
   });
 }

@@ -84,8 +84,8 @@ void main() {
     );
   });
 
-  tearDownAll(() {
+  tearDownAll(() async {
     final file = File('widgets-barcode.pdf');
-    file.writeAsBytesSync(pdf.save());
+    await file.writeAsBytes(await pdf.save());
   });
 }

@@ -201,8 +201,8 @@ void main() {
             )));
   });
 
-  tearDownAll(() {
+  tearDownAll(() async {
     final file = File('widgets-basic.pdf');
-    file.writeAsBytesSync(pdf.save());
+    await file.writeAsBytes(await pdf.save());
   });
 }

@@ -213,8 +213,8 @@ void main() {
     });
   });
 
-  tearDownAll(() {
+  tearDownAll(() async {
     final file = File('widgets-chart.pdf');
-    file.writeAsBytesSync(pdf.save());
+    await file.writeAsBytes(await pdf.save());
   });
 }

@@ -69,8 +69,8 @@ void main() {
     ));
   });
 
-  tearDownAll(() {
+  tearDownAll(() async {
     final file = File('widgets-clip.pdf');
-    file.writeAsBytesSync(pdf.save());
+    await file.writeAsBytes(await pdf.save());
   });
 }

@@ -199,8 +199,8 @@ void main() {
     ));
   });
 
-  tearDownAll(() {
+  tearDownAll(() async {
     final file = File('widgets-container.pdf');
-    file.writeAsBytesSync(pdf.save());
+    await file.writeAsBytes(await pdf.save());
   });
 }

@@ -109,8 +109,8 @@ void main() {
     );
   });
 
-  tearDownAll(() {
+  tearDownAll(() async {
     final file = File('widgets-flex.pdf');
-    file.writeAsBytesSync(pdf.save());
+    await file.writeAsBytes(await pdf.save());
   });
 }

@@ -137,8 +137,8 @@ void main() {
     },
   );
 
-  tearDownAll(() {
+  tearDownAll(() async {
     final file = File('widgets-form.pdf');
-    file.writeAsBytesSync(pdf.save());
+    await file.writeAsBytes(await pdf.save());
   });
 }

@@ -60,8 +60,8 @@ void main() {
     ));
   });
 
-  tearDownAll(() {
+  tearDownAll(() async {
     final file = File('widgets-gridview.pdf');
-    file.writeAsBytesSync(pdf.save());
+    await file.writeAsBytes(await pdf.save());
   });
 }

@@ -66,8 +66,8 @@ void main() {
     );
   });
 
-  tearDownAll(() {
+  tearDownAll(() async {
     final file = File('widgets-icons.pdf');
-    file.writeAsBytesSync(pdf.save());
+    await file.writeAsBytes(await pdf.save());
   });
 }

@@ -28,7 +28,7 @@ void main() {
     }
   });
 
-  test('Pdf Widgets MultiPage', () {
+  test('Pdf Widgets MultiPage', () async {
     Document.debug = true;
 
     final pdf = Document();
@@ -36,13 +36,13 @@ void main() {
     pdf.addPage(MultiPage(build: (Context context) => lines));
 
     final file = File('widgets-multipage.pdf');
-    file.writeAsBytesSync(pdf.save());
+    await file.writeAsBytes(await pdf.save());
 
     final file1 = File('widgets-multipage-1.pdf');
-    file1.writeAsBytesSync(pdf.save());
+    await file1.writeAsBytes(await pdf.save());
   });
 
-  test('Pdf Widgets MonoPage', () {
+  test('Pdf Widgets MonoPage', () async {
     Document.debug = true;
 
     final pdf = Document();
@@ -50,9 +50,9 @@ void main() {
     pdf.addPage(Page(build: (Context context) => Column(children: lines)));
 
     final file = File('widgets-monopage.pdf');
-    file.writeAsBytesSync(pdf.save());
+    await file.writeAsBytes(await pdf.save());
 
     final file1 = File('widgets-monopage-1.pdf');
-    file1.writeAsBytesSync(pdf.save());
+    await file1.writeAsBytes(await pdf.save());
   });
 }

@@ -44,8 +44,8 @@ void main() {
     );
   });
 
-  tearDownAll(() {
+  tearDownAll(() async {
     final file = File('widgets-opacity.pdf');
-    file.writeAsBytesSync(pdf.save());
+    await file.writeAsBytes(await pdf.save());
   });
 }

@@ -83,8 +83,8 @@ void main() {
     );
   });
 
-  tearDownAll(() {
+  tearDownAll(() async {
     final file = File('widgets-outline.pdf');
-    file.writeAsBytesSync(pdf.save());
+    await file.writeAsBytes(await pdf.save());
   });
 }

@@ -54,8 +54,8 @@ void main() {
     );
   });
 
-  tearDownAll(() {
+  tearDownAll(() async {
     final file = File('widgets-partitions.pdf');
-    file.writeAsBytesSync(pdf.save());
+    await file.writeAsBytes(await pdf.save());
   });
 }

@@ -110,8 +110,8 @@ void main() {
     );
   });
 
-  tearDownAll(() {
+  tearDownAll(() async {
     final file = File('widgets-svg.pdf');
-    file.writeAsBytesSync(pdf.save());
+    await file.writeAsBytes(await pdf.save());
   });
 }

@@ -269,8 +269,8 @@ void main() {
     );
   });
 
-  tearDownAll(() {
+  tearDownAll(() async {
     final file = File('widgets-table.pdf');
-    file.writeAsBytesSync(pdf.save());
+    await file.writeAsBytes(await pdf.save());
   });
 }

@@ -279,8 +279,8 @@ void main() {
     },
   );
 
-  tearDownAll(() {
+  tearDownAll(() async {
     final file = File('widgets.pdf');
-    file.writeAsBytesSync(pdf.save());
+    await file.writeAsBytes(await pdf.save());
   });
 }

@@ -290,8 +290,8 @@ void main() {
     );
   });
 
-  tearDownAll(() {
+  tearDownAll(() async {
     final file = File('widgets-text.pdf');
-    file.writeAsBytesSync(pdf.save());
+    await file.writeAsBytes(await pdf.save());
   });
 }

@@ -126,8 +126,8 @@ void main() {
         }));
   });
 
-  tearDownAll(() {
+  tearDownAll(() async {
     final file = File('widgets-theme.pdf');
-    file.writeAsBytesSync(pdf.save());
+    await file.writeAsBytes(await pdf.save());
   });
 }

@@ -100,8 +100,8 @@ void main() {
     );
   });
 
-  tearDownAll(() {
+  tearDownAll(() async {
     final file = File('widgets-watermark.pdf');
-    file.writeAsBytesSync(pdf.save());
+    await file.writeAsBytes(await pdf.save());
   });
 }

@@ -315,8 +315,8 @@ void main() {
     );
   });
 
-  tearDownAll(() {
+  tearDownAll(() async {
     final file = File('widgets-wrap.pdf');
-    file.writeAsBytesSync(pdf.save());
+    await file.writeAsBytes(await pdf.save());
   });
 }

 # Changelog
 
+## 4.0.0
+
+- Remove deprecated methods
+- Document.save() now returns a Future
+
 ## 3.7.2
 
 - Fix Printing on WEB

@@ -84,7 +84,7 @@ To save the pdf file using the [path_provider](https://pub.dev/packages/path_pro
 ```dart
 final output = await getTemporaryDirectory();
 final file = File("${output.path}/example.pdf");
-await file.writeAsBytes(doc.save());
+await file.writeAsBytes(await doc.save());
 ```
 
 You can also print the document using the iOS or Android print service:
@@ -97,7 +97,7 @@ await Printing.layoutPdf(
 Or share the document to other applications:
 
 ```dart
-await Printing.sharePdf(bytes: doc.save(), filename: 'my-document.pdf');
+await Printing.sharePdf(bytes: await doc.save(), filename: 'my-document.pdf');
 ```
 
 To print an HTML document:
@@ -113,7 +113,7 @@ await Printing.layoutPdf(
 Convert a Pdf to images, one image per page, get only pages 1 and 2 at 72 dpi:
 
 ```dart
-await for (var page in Printing.raster(doc.save(), pages: [0, 1], dpi: 72)) {
+await for (var page in Printing.raster(await doc.save(), pages: [0, 1], dpi: 72)) {
   final image = page.toImage(); // ...or page.toPng()
   print(image);
 }

@@ -126,19 +126,13 @@ mixin Printing {
 
   /// Displays a platform popup to share the Pdf document to another application
   static Future<bool> sharePdf({
-    @Deprecated('use bytes with document.save()') PdfDocument document,
-    Uint8List bytes,
+    @required Uint8List bytes,
     String filename = 'document.pdf',
     Rect bounds,
   }) {
-    assert(document != null || bytes != null);
-    assert(!(document == null && bytes == null));
+    assert(bytes != null);
     assert(filename != null);
 
-    if (document != null) {
-      bytes = document.save();
-    }
-
     bounds ??= Rect.fromCircle(center: Offset.zero, radius: 10);
 
     return PrintingPlatform.instance.sharePdf(

@@ -4,7 +4,7 @@ description: Plugin that allows Flutter apps to generate and print documents to
 homepage: https://github.com/DavBfr/dart_pdf/tree/master/printing
 repository: https://github.com/DavBfr/dart_pdf
 issue_tracker: https://github.com/DavBfr/dart_pdf/issues
-version: 3.7.2
+version: 4.0.0
 
 environment:
   sdk: ">=2.3.0 <3.0.0"
@@ -18,7 +18,7 @@ dependencies:
   image: ^2.1.4
   js: ^0.6.1
   meta: ^1.1.5
-  pdf: ^1.13.0
+  pdf: ^2.0.0
   plugin_platform_interface: ^1.0.2
 
 dev_dependencies:

@@ -68,8 +68,8 @@ void main() {
     doc = pw.Document();
   });
 
-  tearDownAll(() {
+  tearDownAll(() async {
     final file = File('printing.pdf');
-    file.writeAsBytesSync(doc.save());
+    await file.writeAsBytes(await doc.save());
   });
 }

@@ -7,7 +7,7 @@ import 'package:string_scanner/string_scanner.dart';
 const dpi = 72.0;
 const px = dpi / PdfPageFormat.inch * PdfPageFormat.point;
 
-void main() {
+Future<void> main() async {
   // Open self
   final source = File('../test/github_social_preview.dart').readAsStringSync();
   final code = DartSyntaxHighlighter(
@@ -74,7 +74,7 @@ void main() {
   // END
 
   // Save the file
-  File('social_preview.pdf').writeAsBytesSync(pdf.save());
+  await File('social_preview.pdf').writeAsBytes(await pdf.save());
 
   // Convert to png
   Process.runSync('pdftocairo',