Remove new in class instanciations

@@ -14,27 +14,27 @@ The coordinate system is using the internal Pdf system:
 
 Example:
 ```dart
-final pdf = new PdfDocument();
-final page = new PdfPage(pdf, pageFormat: PdfPageFormat.letter);
+final pdf = PdfDocument();
+final page = PdfPage(pdf, pageFormat: PdfPageFormat.letter);
 final g = page.getGraphics();
-final font = new PdfFont(pdf);
+final font = PdfFont(pdf);
 
-g.setColor(new PdfColor(0.0, 1.0, 1.0));
+g.setColor(PdfColor(0.0, 1.0, 1.0));
 g.drawRect(50.0, 30.0, 100.0, 50.0);
 g.fillPath();
 
-g.setColor(new PdfColor(0.3, 0.3, 0.3));
+g.setColor(PdfColor(0.3, 0.3, 0.3));
 g.drawString(font, 12.0, "Hello World!", 5.0 * PdfPageFormat.mm, 300.0);
 
-var file = new File('file.pdf');
+var file = File('file.pdf');
 file.writeAsBytesSync(pdf.save());
 ```
 
 To load an image it is possible to use the dart library [image](https://pub.dartlang.org/packages/image):
 
 ```dart
-Image image = decodeImage(new Io.File('test.webp').readAsBytesSync());
-PdfImage image = new PdfImage(
+Image image = decodeImage(Io.File('test.webp').readAsBytesSync());
+PdfImage image = PdfImage(
   pdf,
 	image: img.data.buffer.asUint8List(),
 	width: img.width,
@@ -45,9 +45,9 @@ g.drawImage(image, 100.0, 100.0, 80.0);
 To use a TrueType font:
 
 ```dart
-PdfTtfFont ttf = new PdfTtfFont(
+PdfTtfFont ttf = PdfTtfFont(
   pdf,
-  (new File("open-sans.ttf").readAsBytesSync() as Uint8List).buffer.asByteData());
-g.setColor(new PdfColor(0.3, 0.3, 0.3));
+  (File("open-sans.ttf").readAsBytesSync() as Uint8List).buffer.asByteData());
+g.setColor(PdfColor(0.3, 0.3, 0.3));
 g.drawString(ttf, 20.0, "Dart is awesome", 50.0, 30.0);
 ```

@@ -3,21 +3,21 @@ import 'dart:io';
 import 'package:pdf/pdf.dart';
 
 void main() {
-  final pdf = new PdfDocument(deflate: zlib.encode);
-  final page = new PdfPage(pdf, pageFormat: PdfPageFormat.letter);
+  final pdf = PdfDocument(deflate: zlib.encode);
+  final page = PdfPage(pdf, pageFormat: PdfPageFormat.letter);
   final g = page.getGraphics();
-  final font = new PdfFont(pdf);
+  final font = PdfFont(pdf);
   final top = page.pageFormat.height;
 
-  g.setColor(new PdfColor(0.0, 1.0, 1.0));
+  g.setColor(PdfColor(0.0, 1.0, 1.0));
   g.drawRect(50.0 * PdfPageFormat.mm, top - 80.0 * PdfPageFormat.mm,
       100.0 * PdfPageFormat.mm, 50.0 * PdfPageFormat.mm);
   g.fillPath();
 
-  g.setColor(new PdfColor(0.3, 0.3, 0.3));
+  g.setColor(PdfColor(0.3, 0.3, 0.3));
   g.drawString(font, 12.0, "Hello World!", 10.0 * PdfPageFormat.mm,
       top - 10.0 * PdfPageFormat.mm);
 
-  var file = new File('example.pdf');
+  var file = File('example.pdf');
   file.writeAsBytesSync(pdf.save());
 }

@@ -53,13 +53,13 @@ class PdfAnnot extends PdfObject {
   /// @param s Subtype for this annotation
   /// @param rect coordinates
   factory PdfAnnot.annotation(PdfPage pdfPage, String s, PdfRect rect) =>
-      new PdfAnnot(pdfPage, type: "/Annot", s: s, srcRect: rect);
+      PdfAnnot(pdfPage, type: "/Annot", s: s, srcRect: rect);
 
   /// Creates a text annotation
   /// @param rect coordinates
   /// @param s Text for this annotation
   factory PdfAnnot.text(PdfPage pdfPage, PdfRect rect, String s) =>
-      new PdfAnnot(pdfPage, type: "/Text", srcRect: rect, s: s);
+      PdfAnnot(pdfPage, type: "/Text", srcRect: rect, s: s);
 
   /// Creates a link annotation
   /// @param srcRect coordinates
@@ -68,7 +68,7 @@ class PdfAnnot extends PdfObject {
   /// (must be in User Coordinates)
   factory PdfAnnot.link(PdfPage pdfPage, PdfRect srcRect, PdfObject dest,
           [PdfRect destRect]) =>
-      new PdfAnnot(pdfPage,
+      PdfAnnot(pdfPage,
           type: "/Link", srcRect: srcRect, dest: dest, destRect: destRect);
 
   /// Sets the border for the annotation. By default, no border is defined.
@@ -86,7 +86,7 @@ class PdfAnnot extends PdfObject {
   /// is null, then the default of {3} is used.
   void setBorder(double width,
       {PdfBorderStyle style = PdfBorderStyle.solid, List<double> dash}) {
-    border = new PdfBorder(pdfDocument, width, style: style, dash: dash);
+    border = PdfBorder(pdfDocument, width, style: style, dash: dash);
   }
 
   /// Output the annotation
@@ -111,7 +111,7 @@ class PdfAnnot extends PdfObject {
     if (subtype == "/Text") {
       params["/Contents"] = PdfStream.string(s);
     } else if (subtype == "/Link") {
-      var dests = new List<PdfStream>();
+      var dests = List<PdfStream>();
       dests.add(dest.ref());
       if (destRect == null)
         dests.add(PdfStream.string("/Fit"));

@@ -20,7 +20,7 @@ part of pdf;
 
 class Ascii85Encoder extends Converter<List<int>, List<int>> {
   List<int> convert(List<int> input) {
-    Uint8List buffer = new Uint8List(_maxEncodedLen(input.length) + 2);
+    Uint8List buffer = Uint8List(_maxEncodedLen(input.length) + 2);
 
     var b = 0;
     var s = 0;

@@ -64,7 +64,7 @@ class PdfBorder extends PdfObject {
   void writeContent(PdfStream os) {
     super.writeContent(os);
 
-    var data = new List<PdfStream>();
+    var data = List<PdfStream>();
     data.add(PdfStream.string("/S"));
     data.add(PdfStream.string(
         "/" + "SDBIU".substring(style.index, style.index + 1)));

@@ -24,20 +24,17 @@ class PdfColor {
   final double g;
   final double b;
 
-  static var black = new PdfColor(0.0, 0.0, 0.0);
+  static var black = PdfColor(0.0, 0.0, 0.0);
 
   const PdfColor(this.r, this.g, this.b, [this.a = 1.0]);
 
   factory PdfColor.fromInt(int color) {
-    return new PdfColor(
-        (color >> 16 & 0xff) / 255.0,
-        (color >> 8 & 0xff) / 255.0,
-        (color & 0xff) / 255.0,
-        (color >> 24 & 0xff) / 255.0);
+    return PdfColor((color >> 16 & 0xff) / 255.0, (color >> 8 & 0xff) / 255.0,
+        (color & 0xff) / 255.0, (color >> 24 & 0xff) / 255.0);
   }
 
   factory PdfColor.fromHex(String color) {
-    return new PdfColor(
+    return PdfColor(
         (int.parse(color.substring(0, 1), radix: 16) >> 16 & 0xff) / 255.0,
         (int.parse(color.substring(2, 3), radix: 16) >> 8 & 0xff) / 255.0,
         (int.parse(color.substring(4, 5), radix: 16) & 0xff) / 255.0,

@@ -50,11 +50,11 @@ class PDFAnnot extends PdfAnnot {
 
   factory PDFAnnot.annotation(
           PdfPage pdfPage, String s, double l, double b, double r, double t) =>
-      new PDFAnnot(pdfPage, type: "/Annot", s: s, l: l, b: b, r: r, t: t);
+      PDFAnnot(pdfPage, type: "/Annot", s: s, l: l, b: b, r: r, t: t);
 
   factory PDFAnnot.text(
           PdfPage pdfPage, double l, double b, double r, double t, String s) =>
-      new PDFAnnot(pdfPage, type: "/Text", l: l, b: b, r: r, t: t, s: s);
+      PDFAnnot(pdfPage, type: "/Text", l: l, b: b, r: r, t: t, s: s);
 
   factory PDFAnnot.link(PdfPage pdfPage, double l, double b, double r, double t,
           PdfObject dest,
@@ -62,7 +62,7 @@ class PDFAnnot extends PdfAnnot {
           double fb = FULL_PAGE,
           double fr = FULL_PAGE,
           double ft = FULL_PAGE]) =>
-      new PDFAnnot(pdfPage,
+      PDFAnnot(pdfPage,
           type: "/Link",
           l: l,
           b: b,
@@ -249,7 +249,7 @@ class PDFPage extends PdfPage {
   /// @return a Dimension object containing the width and height of the page.
   /// use pageFormat.dimension
   @deprecated
-  PdfPoint getDimension() => new PdfPoint(pageFormat.width, pageFormat.height);
+  PdfPoint getDimension() => PdfPoint(pageFormat.width, pageFormat.height);
 
   /// This method adds a text note to the document.
   /// @param note Text of the note
@@ -262,8 +262,8 @@ class PDFPage extends PdfPage {
   PdfAnnot addNote(String note, double x, y, w, h) {
     var xy1 = cxy(x, y + h);
     var xy2 = cxy(x + w, y);
-    PdfAnnot ob = new PdfAnnot.text(
-        this, PdfRect.fromLTRB(xy1.x, xy1.y, xy2.x, xy2.y), note);
+    PdfAnnot ob =
+        PdfAnnot.text(this, PdfRect.fromLTRB(xy1.x, xy1.y, xy2.x, xy2.y), note);
     return ob;
   }
 
@@ -289,7 +289,7 @@ class PDFPage extends PdfPage {
     var xy2 = cxy(x + w, y);
     var xy3 = cxy(vx, vy + vh);
     var xy4 = cxy(vx + vw, vy);
-    PdfAnnot ob = new PdfAnnot.link(
+    PdfAnnot ob = PdfAnnot.link(
         this,
         PdfRect.fromLTRB(xy1.x, xy1.y, xy2.x, xy2.y),
         dest,
@@ -310,7 +310,7 @@ class PDFPage extends PdfPage {
       {double x, double y, double w, double h}) {
     PdfPoint xy1 = cxy(x, y + h);
     PdfPoint xy2 = cxy(x + w, y);
-    PdfOutline outline = new PdfOutline(pdfDocument,
+    PdfOutline outline = PdfOutline(pdfDocument,
         title: title,
         dest: this,
         rect: PdfRect.fromLTRB(xy1.x, xy2.y, xy2.x, xy1.y));
@@ -340,7 +340,7 @@ class PDFPage extends PdfPage {
   /// @param y Coordinate in User space
   /// @return array containing the x & y Coordinate in User space
   @deprecated
-  PdfPoint cxy(double x, double y) => new PdfPoint(x, pageFormat.height - y);
+  PdfPoint cxy(double x, double y) => PdfPoint(x, pageFormat.height - y);
 }
 
 @deprecated

@@ -49,7 +49,7 @@ class PdfDocument {
   int _objser;
 
   /// This vector contains each indirect object within the document.
-  final Set<PdfObject> objects = new Set<PdfObject>();
+  final Set<PdfObject> objects = Set<PdfObject>();
 
   /// This is the Catalog object, which is required by each Pdf Document
   PdfCatalog catalog;
@@ -82,7 +82,7 @@ class PdfDocument {
   ];
 
   /// This holds the current fonts
-  final Set<PdfFont> fonts = new Set<PdfFont>();
+  final Set<PdfFont> fonts = Set<PdfFont>();
 
   /// Creates a new serial number
   int _genSerial() => _objser++;
@@ -94,9 +94,9 @@ class PdfDocument {
     _objser = 1;
 
     // Now create some standard objects
-    pdfPageList = new PdfPageList(this);
-    catalog = new PdfCatalog(this, pdfPageList, pageMode);
-    info = new PdfInfo(this);
+    pdfPageList = PdfPageList(this);
+    catalog = PdfCatalog(this, pdfPageList, pageMode);
+    info = PdfInfo(this);
   }
 
   /// This returns a specific page. It's used mainly when using a
@@ -113,7 +113,7 @@ class PdfDocument {
   /// @return the root outline
   PdfOutline get outline {
     if (_outline == null) {
-      _outline = new PdfOutline(this);
+      _outline = PdfOutline(this);
       catalog.outlines = _outline;
     }
     return _outline;
@@ -131,7 +131,7 @@ class PdfDocument {
   ///
   /// @param os OutputStream to write the document to
   void write(PdfStream os) {
-    PdfOutput pos = new PdfOutput(os);
+    PdfOutput pos = PdfOutput(os);
 
     // Write each object to the [PdfStream]. We call via the output
     // as that builds the xref table
@@ -144,7 +144,7 @@ class PdfDocument {
   }
 
   List<int> save() {
-    PdfStream os = new PdfStream();
+    PdfStream os = PdfStream();
     write(os);
     return os.output();
   }

@@ -79,7 +79,7 @@ class PdfFont extends PdfObject {
       w += n == chars.length - 1 ? r.w : glyphAdvance(c);
     }
 
-    return new PdfRect(x, y, w, h);
+    return PdfRect(x, y, w, h);
   }
 
   PdfPoint stringSize(String s) {
@@ -94,6 +94,6 @@ class PdfFont extends PdfObject {
       w += glyphAdvance(c);
     }
 
-    return new PdfPoint(w, h);
+    return PdfPoint(w, h);
   }
 }

@@ -32,7 +32,7 @@ class PdfFontDescriptor extends PdfObject {
     params["/FontName"] = PdfStream.string(ttfFont.baseFont);
     params["/FontFile2"] = file.ref();
     params["/Flags"] = PdfStream.intNum(32);
-    params["/FontBBox"] = new PdfStream()
+    params["/FontBBox"] = PdfStream()
       ..putStringArray([
         ttfFont.font.xMin,
         ttfFont.font.yMin,

@@ -20,10 +20,10 @@ part of pdf;
 
 class PdfFormXObject extends PdfXObject {
   /// The fonts associated with this page
-  final fonts = new Map<String, PdfFont>();
+  final fonts = Map<String, PdfFont>();
 
   /// The xobjects or other images in the pdf
-  final xobjects = new Map<String, PdfXObject>();
+  final xobjects = Map<String, PdfXObject>();
 
   PdfFormXObject(PdfDocument pdfDocument) : super(pdfDocument, '/Form') {
     params["/FormType"] = PdfStream.string("1");
@@ -43,16 +43,16 @@ class PdfFormXObject extends PdfXObject {
 
     // Now the resources
     /// This holds any resources for this FormXObject
-    final resources = new Map<String, PdfStream>();
+    final resources = Map<String, PdfStream>();
 
     // fonts
     if (fonts.length > 0) {
-      resources["/Font"] = new PdfStream()..putObjectDictionary(fonts);
+      resources["/Font"] = PdfStream()..putObjectDictionary(fonts);
     }
 
     // Now the XObjects
     if (xobjects.length > 0) {
-      resources["/XObject"] = new PdfStream()..putObjectDictionary(xobjects);
+      resources["/XObject"] = PdfStream()..putObjectDictionary(xobjects);
     }
 
     if (resources.length > 0) {

@@ -32,7 +32,7 @@ class PdfGraphics {
 
   PdfFont get defaultFont {
     if (page.pdfDocument.fonts.length == 0) {
-      new PdfFont(page.pdfDocument);
+      PdfFont(page.pdfDocument);
     }
 
     return page.pdfDocument.fonts.elementAt(0);
@@ -200,9 +200,9 @@ class PdfGraphics {
   }
 
   void drawShape(String d) {
-    var sb = new StringBuffer();
+    var sb = StringBuffer();
 
-    RegExp exp = new RegExp(r"([MmZzLlHhVvCcSsQqTtAa])|(-[\.0-9]+)|([\.0-9]+)");
+    RegExp exp = RegExp(r"([MmZzLlHhVvCcSsQqTtAa])|(-[\.0-9]+)|([\.0-9]+)");
     var matches = exp.allMatches(d);
     var action;
     for (var m in matches) {

@@ -60,7 +60,7 @@ class PdfImage extends PdfXObject {
     params['/Name'] = PdfStream.string(_name);
 
     if (alphaChannel == false && alpha) {
-      var _sMask = new PdfImage(pdfDocument,
+      var _sMask = PdfImage(pdfDocument,
           image: image,
           width: width,
           height: height,
@@ -85,7 +85,7 @@ class PdfImage extends PdfXObject {
     int h = height;
     int s = w * h;
 
-    Uint8List out = new Uint8List(alphaChannel ? s : s * 3);
+    Uint8List out = Uint8List(alphaChannel ? s : s * 3);
 
     if (alphaChannel) {
       for (int i = 0; i < s; i++) {

@@ -20,7 +20,7 @@ part of pdf;
 
 class PdfObject {
   /// This is the object parameters.
-  final params = new Map<String, PdfStream>();
+  final params = Map<String, PdfStream>();
 
   /// This is the unique serial number for this object.
   final int objser;

@@ -20,7 +20,7 @@ part of pdf;
 
 class PdfObjectStream extends PdfObject {
   /// This holds the stream's content.
-  final PdfStream buf = new PdfStream();
+  final PdfStream buf = PdfStream();
 
   /// defines if the stream needs to be converted to ascii85
   final bool isBinary;
@@ -46,7 +46,7 @@ class PdfObjectStream extends PdfObject {
       params["/Filter"] = PdfStream.string("/FlateDecode");
     } else if (isBinary) {
       // This is a Ascii85 stream
-      var e = new Ascii85Encoder();
+      var e = Ascii85Encoder();
       _data = e.convert(buf.output());
       params["/Filter"] = PdfStream.string("/ASCII85Decode");
     } else {

@@ -74,7 +74,7 @@ class PdfOutline extends PdfObject {
   /// @return [PdfOutline] object created, for creating sub-outlines
   PdfOutline add({String title, PdfPage dest, PdfRect rect}) {
     PdfOutline outline =
-        new PdfOutline(pdfDocument, title: title, dest: dest, rect: rect);
+        PdfOutline(pdfDocument, title: title, dest: dest, rect: rect);
     // Tell the outline of ourselves
     outline.parent = this;
     return outline;
@@ -88,7 +88,7 @@ class PdfOutline extends PdfObject {
     // These are for kids only
     if (parent != null) {
       params["/Title"] = PdfStream.string(title);
-      var dests = new List<PdfStream>();
+      var dests = List<PdfStream>();
       dests.add(dest.ref());
 
       if (destMode == PdfOutlineMode.fitpage) {

@@ -48,7 +48,7 @@ class PdfOutput {
     if (ob is PdfCatalog) rootID = ob;
     if (ob is PdfInfo) infoID = ob;
 
-    offsets.add(new PdfXref(ob.objser, os.offset));
+    offsets.add(PdfXref(ob.objser, os.offset));
     ob.write(os);
   }
 
@@ -72,7 +72,7 @@ class PdfOutput {
     var block = []; // xrefs in this block
 
     // We need block 0 to exist
-    block.add(new PdfXref(0, 0, generation: 65535));
+    block.add(PdfXref(0, 0, generation: 65535));
 
     for (PdfXref x in offsets) {
       if (firstid == -1) firstid = x.id;
@@ -107,7 +107,7 @@ class PdfOutput {
       os.putStream(rootID.ref());
       os.putString("\n");
     } else
-      throw new Exception("Root object is not present in document");
+      throw Exception("Root object is not present in document");
 
     // the /Info reference (OPTIONAL)
     if (infoID != null) {

@@ -33,10 +33,10 @@ class PdfPage extends PdfObject {
   List<PdfAnnot> annotations = [];
 
   /// The fonts associated with this page
-  final fonts = new Map<String, PdfFont>();
+  final fonts = Map<String, PdfFont>();
 
   /// The xobjects or other images in the pdf
-  final xObjects = new Map<String, PdfXObject>();
+  final xObjects = Map<String, PdfXObject>();
 
   /// This constructs a Page object, which will hold any contents for this
   /// page.
@@ -58,8 +58,8 @@ class PdfPage extends PdfObject {
   ///
   /// @return a new [PdfGraphics] object to be used to draw this page.
   PdfGraphics getGraphics() {
-    var stream = new PdfObjectStream(pdfDocument);
-    var g = new PdfGraphics(this, stream.buf);
+    var stream = PdfObjectStream(pdfDocument);
+    var g = PdfGraphics(this, stream.buf);
     contents.add(stream);
     return g;
   }
@@ -83,7 +83,7 @@ class PdfPage extends PdfObject {
     params["/Parent"] = pdfDocument.pdfPageList.ref();
 
     // the /MediaBox for the page size
-    params["/MediaBox"] = new PdfStream()
+    params["/MediaBox"] = PdfStream()
       ..putStringArray([0, 0, pageFormat.width, pageFormat.height]);
 
     // Rotation (if not zero)
@@ -98,22 +98,22 @@ class PdfPage extends PdfObject {
       if (contents.length == 1) {
         params["/Contents"] = contents[0].ref();
       } else {
-        params["/Contents"] = new PdfStream()..putObjectArray(contents);
+        params["/Contents"] = PdfStream()..putObjectArray(contents);
       }
     }
 
     // Now the resources
     /// This holds any resources for this page
-    final resources = new Map<String, PdfStream>();
+    final resources = Map<String, PdfStream>();
 
     // fonts
     if (fonts.length > 0) {
-      resources["/Font"] = new PdfStream()..putObjectDictionary(fonts);
+      resources["/Font"] = PdfStream()..putObjectDictionary(fonts);
     }
 
     // Now the XObjects
     if (xObjects.length > 0) {
-      resources["/XObject"] = new PdfStream()..putObjectDictionary(xObjects);
+      resources["/XObject"] = PdfStream()..putObjectDictionary(xObjects);
     }
 
     params["/Resources"] = PdfStream.dictionary(resources);
@@ -125,7 +125,7 @@ class PdfPage extends PdfObject {
 
     // The /Annots object
     if (annotations.length > 0) {
-      params["/Annots"] = new PdfStream()..putObjectArray(annotations);
+      params["/Annots"] = PdfStream()..putObjectArray(annotations);
     }
   }
 }

@@ -35,7 +35,7 @@ class PdfPageFormat {
 
   const PdfPageFormat(this.width, this.height);
 
-  PdfPoint get dimension => new PdfPoint(width, height);
+  PdfPoint get dimension => PdfPoint(width, height);
 
   PdfPageFormat get landscape =>
       width >= height ? this : PdfPageFormat(height, width);

@@ -34,7 +34,7 @@ class PdfPageList extends PdfObject {
   void prepare() {
     super.prepare();
 
-    params["/Kids"] = new PdfStream()..putObjectArray(pages);
+    params["/Kids"] = PdfStream()..putObjectArray(pages);
     params["/Count"] = PdfStream.intNum(pages.length);
   }
 }

@@ -35,7 +35,7 @@ class PdfStream {
     }
   }
 
-  static PdfStream string(String s) => new PdfStream()..putString(s);
+  static PdfStream string(String s) => PdfStream()..putString(s);
 
   void putStringUtf16(String s) {
     for (int codeUnit in s.codeUnits) {
@@ -52,8 +52,8 @@ class PdfStream {
     putString(d.toString());
   }
 
-  static PdfStream num(double d) => new PdfStream()..putNum(d);
-  static PdfStream intNum(int i) => new PdfStream()..putString(i.toString());
+  static PdfStream num(double d) => PdfStream()..putNum(d);
+  static PdfStream intNum(int i) => PdfStream()..putString(i.toString());
 
   void putText(String s) {
     // Escape special characters
@@ -79,7 +79,7 @@ class PdfStream {
     putBytes(latin1.encode('(' + s + ')'));
   }
 
-  static PdfStream text(String s) => new PdfStream()..putText(s);
+  static PdfStream text(String s) => PdfStream()..putText(s);
 
   void putBool(bool value) {
     putString(value ? "true" : "false");
@@ -108,7 +108,7 @@ class PdfStream {
   }
 
   static PdfStream array(List<PdfStream> values) =>
-      new PdfStream()..putArray(values);
+      PdfStream()..putArray(values);
 
   void putDictionary(Map<String, PdfStream> values) {
     putString("<< ");
@@ -121,7 +121,7 @@ class PdfStream {
   }
 
   static PdfStream dictionary(Map<String, PdfStream> values) =>
-      new PdfStream()..putDictionary(values);
+      PdfStream()..putDictionary(values);
 
   void putObjectDictionary(Map<String, PdfObject> values) {
     putString("<< ");

@@ -29,12 +29,12 @@ class TtfParser {
   static const _GLYF = "glyf";
 
   final ByteData bytes;
-  final _tableOffsets = new Map<String, int>();
+  final _tableOffsets = Map<String, int>();
   String _fontName;
-  final advanceWidth = new List<double>();
-  final charToGlyphIndexMap = new Map<int, int>();
-  final glyphOffsets = new List<int>();
-  final glyphInfoMap = new Map<int, PdfRect>();
+  final advanceWidth = List<double>();
+  final charToGlyphIndexMap = Map<int, int>();
+  final glyphOffsets = List<int>();
+  final glyphInfoMap = Map<int, PdfRect>();
 
   TtfParser(this.bytes) {
     final numTables = bytes.getUint16(4);
@@ -138,20 +138,20 @@ class TtfParser {
 
   void _parseCMapFormat4(int basePosition, int length) {
     final segCount = bytes.getUint16(basePosition + 2) ~/ 2;
-    final endCodes = new List<int>();
+    final endCodes = List<int>();
     for (var i = 0; i < segCount; i++) {
       endCodes.add(bytes.getUint16(basePosition + i * 2 + 10));
     }
-    final startCodes = new List<int>();
+    final startCodes = List<int>();
     for (var i = 0; i < segCount; i++) {
       startCodes.add(bytes.getUint16(basePosition + (segCount + i) * 2 + 12));
     }
-    final idDeltas = new List<int>();
+    final idDeltas = List<int>();
     for (var i = 0; i < segCount; i++) {
       idDeltas.add(bytes.getUint16(basePosition + (segCount * 2 + i) * 2 + 12));
     }
     final idRangeOffsetBasePos = basePosition + segCount * 6 + 12;
-    final idRangeOffsets = new List<int>();
+    final idRangeOffsets = List<int>();
     for (var i = 0; i < segCount; i++) {
       idRangeOffsets.add(bytes.getUint16(idRangeOffsetBasePos + i * 2));
     }
@@ -210,7 +210,7 @@ class TtfParser {
       final yMin = bytes.getInt16(baseOffset + offset + 4); // 4
       final xMax = bytes.getInt16(baseOffset + offset + 6); // 6
       final yMax = bytes.getInt16(baseOffset + offset + 8); // 8
-      glyphInfoMap[glyphIndex] = new PdfRect(
+      glyphInfoMap[glyphIndex] = PdfRect(
           xMin.toDouble() / unitsPerEm,
           yMin.toDouble() / unitsPerEm,
           xMax.toDouble() / unitsPerEm,

@@ -22,18 +22,18 @@ class PdfTtfFont extends PdfFont {
   PdfObject unicodeCMap;
   PdfFontDescriptor descriptor;
   PdfArrayObject widthsObject;
-  final widths = new List<String>();
+  final widths = List<String>();
   final TtfParser font;
   int _charMin;
   int _charMax;
 
   /// Constructs a [PdfTtfFont]
   PdfTtfFont(PdfDocument pdfDocument, ByteData bytes)
-      : font = new TtfParser(bytes),
+      : font = TtfParser(bytes),
         super(pdfDocument, subtype: "/TrueType") {
     baseFont = "/" + font.fontName.replaceAll(" ", "");
 
-    PdfObjectStream file = new PdfObjectStream(pdfDocument, isBinary: true);
+    PdfObjectStream file = PdfObjectStream(pdfDocument, isBinary: true);
     final data = bytes.buffer.asUint8List();
     file.buf.putBytes(data);
     file.params["/Length1"] = PdfStream.intNum(data.length);
@@ -45,9 +45,9 @@ class PdfTtfFont extends PdfFont {
       widths.add((glyphAdvance(i) * 1000.0).toString());
     }
 
-    unicodeCMap = new PdfObject(pdfDocument);
-    descriptor = new PdfFontDescriptor(this, file);
-    widthsObject = new PdfArrayObject(pdfDocument, widths);
+    unicodeCMap = PdfObject(pdfDocument);
+    descriptor = PdfFontDescriptor(this, file);
+    widthsObject = PdfArrayObject(pdfDocument, widths);
   }
 
   @override

@@ -8,53 +8,53 @@ import 'package:vector_math/vector_math_64.dart';
 
 void main() {
   test('Pdf', () {
-    var img = new Uint32List(10 * 10);
+    var img = Uint32List(10 * 10);
     img.fillRange(0, img.length - 1, 0x12345678);
 
-    var pdf = new PdfDocument(deflate: zlib.encode);
+    var pdf = PdfDocument(deflate: zlib.encode);
     var i = pdf.info;
     i.author = "David PHAM-VAN";
     i.creator = i.author;
     i.title = "My Title";
     i.subject = "My Subject";
-    var page = new PdfPage(pdf, pageFormat: const PdfPageFormat(500.0, 300.0));
+    var page = PdfPage(pdf, pageFormat: const PdfPageFormat(500.0, 300.0));
 
     var g = page.getGraphics();
     g.saveContext();
-    var tm = new Matrix4.identity();
+    var tm = Matrix4.identity();
     tm.translate(100.0, 700.0);
     g.setTransform(tm);
 //  g.drawShape("M37 0H9C6.24 0 4 2.24 4 5v38c0 2.76 2.24 5 5 5h28c2.76 0 5-2.24 5-5V5c0-2.76-2.24-5-5-5zM23 46c-1.66 0-3-1.34-3-3s1.34-3 3-3 3 1.34 3 3-1.34 3-3 3zm15-8H8V6h30v32z");
     g.restoreContext();
-    var font1 = new PdfFont(pdf);
+    var font1 = PdfFont(pdf);
 
-    var font2 = new PdfTtfFont(
+    var font2 = PdfTtfFont(
         pdf,
-        (new File("open-sans.ttf").readAsBytesSync() as Uint8List)
+        (File("open-sans.ttf").readAsBytesSync() as Uint8List)
             .buffer
             .asByteData());
     var s = "Hello World!";
     var r = font2.stringBounds(s);
     const FS = 20.0;
-    g.setColor(new PdfColor(0.0, 1.0, 1.0));
+    g.setColor(PdfColor(0.0, 1.0, 1.0));
     g.drawRect(50.0 + r.x * FS, 30.0 + r.y * FS, r.w * FS, r.h * FS);
     g.fillPath();
-    g.setColor(new PdfColor(0.3, 0.3, 0.3));
+    g.setColor(PdfColor(0.3, 0.3, 0.3));
     g.drawString(font2, FS, s, 50.0, 30.0);
 
-    g.setColor(new PdfColor(1.0, 0.0, 0.0));
+    g.setColor(PdfColor(1.0, 0.0, 0.0));
     g.drawString(font2, 20.0, "Hé (Olà)", 50.0, 10.0);
     g.drawLine(30.0, 30.0, 200.0, 200.0);
     g.strokePath();
-    g.setColor(new PdfColor(1.0, 0.0, 0.0));
+    g.setColor(PdfColor(1.0, 0.0, 0.0));
     g.drawRect(300.0, 150.0, 50.0, 50.0);
     g.fillPath();
-    g.setColor(new PdfColor(0.0, 0.5, 0.0));
-    var image = new PdfImage(pdf,
-        image: img.buffer.asUint8List(), width: 10, height: 10);
+    g.setColor(PdfColor(0.0, 0.5, 0.0));
+    var image =
+        PdfImage(pdf, image: img.buffer.asUint8List(), width: 10, height: 10);
     for (var i = 10.0; i < 90.0; i += 5.0) {
       g.saveContext();
-      var tm = new Matrix4.identity();
+      var tm = Matrix4.identity();
       tm.rotateZ(i * pi / 360.0);
       tm.translate(300.0, -100.0);
       g.setTransform(tm);
@@ -63,7 +63,7 @@ void main() {
       g.restoreContext();
     }
 
-    var file = new File('file.pdf');
+    var file = File('file.pdf');
     file.writeAsBytesSync(pdf.save());
   });
 }

@@ -5,14 +5,14 @@ import "package:test/test.dart";
 
 void main() {
   test('Pdf1', () {
-    var pdf = new PdfDocument();
-    var page = new PdfPage(pdf, pageFormat: PdfPageFormat.a4);
+    var pdf = PdfDocument();
+    var page = PdfPage(pdf, pageFormat: PdfPageFormat.a4);
 
     var g = page.getGraphics();
     g.drawLine(30.0, 30.0, 200.0, 200.0);
     g.strokePath();
 
-    var file = new File('file1.pdf');
+    var file = File('file1.pdf');
     file.writeAsBytesSync(pdf.save());
   });
 }

@@ -6,43 +6,43 @@ import 'package:test/test.dart';
 
 void main() {
   test('Pdf', () {
-    var pdf = new PdfDocument();
+    var pdf = PdfDocument();
     var i = pdf.info;
     i.author = "David PHAM-VAN";
     i.creator = i.author;
     i.title = "My Title";
     i.subject = "My Subject";
-    var page = new PdfPage(pdf, pageFormat: const PdfPageFormat(500.0, 300.0));
+    var page = PdfPage(pdf, pageFormat: const PdfPageFormat(500.0, 300.0));
 
     var g = page.getGraphics();
-    var ttf = new PdfTtfFont(
+    var ttf = PdfTtfFont(
         pdf,
-        (new File("open-sans.ttf").readAsBytesSync() as Uint8List)
+        (File("open-sans.ttf").readAsBytesSync() as Uint8List)
             .buffer
             .asByteData());
     var s = "Hello World!";
     var r = ttf.stringBounds(s);
     const FS = 20.0;
-    g.setColor(new PdfColor(0.0, 1.0, 1.0));
+    g.setColor(PdfColor(0.0, 1.0, 1.0));
     g.drawRect(50.0 + r.x * FS, 30.0 + r.y * FS, r.w * FS, r.h * FS);
     g.fillPath();
-    g.setColor(new PdfColor(0.3, 0.3, 0.3));
+    g.setColor(PdfColor(0.3, 0.3, 0.3));
     g.drawString(ttf, FS, s, 50.0, 30.0);
 
-    var roboto = new PdfTtfFont(
+    var roboto = PdfTtfFont(
         pdf,
-        (new File("roboto.ttf").readAsBytesSync() as Uint8List)
+        (File("roboto.ttf").readAsBytesSync() as Uint8List)
             .buffer
             .asByteData());
 
     r = roboto.stringBounds(s);
-    g.setColor(new PdfColor(0.0, 1.0, 1.0));
+    g.setColor(PdfColor(0.0, 1.0, 1.0));
     g.drawRect(50.0 + r.x * FS, 130.0 + r.y * FS, r.w * FS, r.h * FS);
     g.fillPath();
-    g.setColor(new PdfColor(0.3, 0.3, 0.3));
+    g.setColor(PdfColor(0.3, 0.3, 0.3));
     g.drawString(roboto, FS, s, 50.0, 130.0);
 
-    var file = new File('file2.pdf');
+    var file = File('file2.pdf');
     file.writeAsBytesSync(pdf.save());
   });
 }

@@ -28,7 +28,7 @@ To use a TrueType font from a flutter bundle:
 
 ```dart
 var font = await rootBundle.load("assets/open-sans.ttf");
-PdfTtfFont ttf = new PdfTtfFont(pdf, font);
-g.setColor(new PdfColor(0.3, 0.3, 0.3));
+PdfTtfFont ttf = PdfTtfFont(pdf, font);
+g.setColor(PdfColor(0.3, 0.3, 0.3));
 g.drawString(ttf, 20.0, "Dart is awesome", 50.0, 30.0);
 ```

@@ -6,32 +6,32 @@ import 'package:flutter/rendering.dart';
 import 'package:pdf/pdf.dart';
 import 'package:printing/printing.dart';
 
-void main() => runApp(new MaterialApp(home: new MyApp()));
+void main() => runApp(MaterialApp(home: MyApp()));
 
 class MyApp extends StatefulWidget {
   @override
   MyAppState createState() {
-    return new MyAppState();
+    return MyAppState();
   }
 }
 
 class MyAppState extends State<MyApp> {
-  final shareWidget = new GlobalKey();
-  final previewContainer = new GlobalKey();
+  final shareWidget = GlobalKey();
+  final previewContainer = GlobalKey();
 
   PdfDocument _generateDocument() {
-    final pdf = new PdfDocument(deflate: zlib.encode);
-    final page = new PdfPage(pdf, pageFormat: PdfPageFormat.a4);
+    final pdf = PdfDocument(deflate: zlib.encode);
+    final page = PdfPage(pdf, pageFormat: PdfPageFormat.a4);
     final g = page.getGraphics();
-    final font = new PdfFont(pdf);
+    final font = PdfFont(pdf);
     final top = page.pageFormat.height;
 
-    g.setColor(new PdfColor(0.0, 1.0, 1.0));
+    g.setColor(PdfColor(0.0, 1.0, 1.0));
     g.drawRect(50.0 * PdfPageFormat.mm, top - 80.0 * PdfPageFormat.mm,
         100.0 * PdfPageFormat.mm, 50.0 * PdfPageFormat.mm);
     g.fillPath();
 
-    g.setColor(new PdfColor(0.3, 0.3, 0.3));
+    g.setColor(PdfColor(0.3, 0.3, 0.3));
     g.drawString(font, 12.0, "Hello World!", 10.0 * PdfPageFormat.mm,
         top - 10.0 * PdfPageFormat.mm);
 
@@ -55,15 +55,15 @@ class MyAppState extends State<MyApp> {
         referenceBox.localToGlobal(referenceBox.paintBounds.topLeft);
     final bottomRight =
         referenceBox.localToGlobal(referenceBox.paintBounds.bottomRight);
-    final bounds = new Rect.fromPoints(topLeft, bottomRight);
+    final bounds = Rect.fromPoints(topLeft, bottomRight);
 
     Printing.sharePdf(document: pdf, bounds: bounds);
   }
 
   Future<void> _printScreen() async {
     const margin = 10.0 * PdfPageFormat.mm;
-    final pdf = new PdfDocument(deflate: zlib.encode);
-    final page = new PdfPage(pdf, pageFormat: PdfPageFormat.a4);
+    final pdf = PdfDocument(deflate: zlib.encode);
+    final page = PdfPage(pdf, pageFormat: PdfPageFormat.a4);
     final g = page.getGraphics();
 
     RenderRepaintBoundary boundary =
@@ -94,25 +94,24 @@ class MyAppState extends State<MyApp> {
 
   @override
   Widget build(BuildContext context) {
-    return new RepaintBoundary(
+    return RepaintBoundary(
         key: previewContainer,
-        child: new Scaffold(
-          appBar: new AppBar(
+        child: Scaffold(
+          appBar: AppBar(
             title: const Text('Pdf Printing Example'),
           ),
-          body: new Center(
-            child: new Column(
+          body: Center(
+            child: Column(
               mainAxisAlignment: MainAxisAlignment.spaceEvenly,
               children: <Widget>[
-                new RaisedButton(
-                    child: new Text('Print Document'), onPressed: _printPdf),
-                new RaisedButton(
+                RaisedButton(
+                    child: Text('Print Document'), onPressed: _printPdf),
+                RaisedButton(
                     key: shareWidget,
-                    child: new Text('Share Document'),
+                    child: Text('Share Document'),
                     onPressed: _sharePdf),
-                new RaisedButton(
-                    child: new Text('Print Screenshot'),
-                    onPressed: _printScreen),
+                RaisedButton(
+                    child: Text('Print Screenshot'), onPressed: _printScreen),
               ],
             ),
           ),

@@ -34,7 +34,7 @@ class Printing {
     if (document != null) bytes = document.save();
 
     final Map<String, dynamic> params = <String, dynamic>{
-      'doc': new Uint8List.fromList(bytes),
+      'doc': Uint8List.fromList(bytes),
     };
 
     await _channel.invokeMethod('printPdf', params);
@@ -48,11 +48,11 @@ class Printing {
     if (document != null) bytes = document.save();
 
     if (bounds == null) {
-      bounds = new Rect.fromCircle(center: Offset.zero, radius: 10.0);
+      bounds = Rect.fromCircle(center: Offset.zero, radius: 10.0);
     }
 
     final Map<String, dynamic> params = <String, dynamic>{
-      'doc': new Uint8List.fromList(bytes),
+      'doc': Uint8List.fromList(bytes),
       'x': bounds.left,
       'y': bounds.top,
       'w': bounds.width,