Replace Theme with ThemeData

@@ -8,6 +8,7 @@
 - Add TableRow decoration
 - Add Chart Widget [Marco Papula]
 - Add Divider Widget
+- Replace Theme with ThemeData
 
 ## 1.6.2
 

@@ -55,7 +55,7 @@ class Document {
 
   final PdfDocument document;
 
-  final Theme theme;
+  final ThemeData theme;
 
   final List<Page> _pages = <Page>[];
 

@@ -87,7 +87,7 @@ class MultiPage extends Page {
       this.crossAxisAlignment = CrossAxisAlignment.start,
       this.header,
       this.footer,
-      Theme theme,
+      ThemeData theme,
       this.maxPages = 20,
       PageOrientation orientation,
       EdgeInsets margin})
@@ -159,7 +159,8 @@ class MultiPage extends Page {
         : BoxConstraints(
             maxWidth: pageFormat.width - _margin.horizontal,
             maxHeight: pageFormat.height - _margin.vertical);
-    final Theme calculatedTheme = theme ?? document.theme ?? Theme.base();
+    final ThemeData calculatedTheme =
+        theme ?? document.theme ?? ThemeData.base();
     Context context;
     double offsetEnd;
     double offsetStart;

@@ -28,7 +28,7 @@ class Page {
       {PageTheme pageTheme,
       PdfPageFormat pageFormat,
       BuildCallback build,
-      Theme theme,
+      ThemeData theme,
       PageOrientation orientation,
       EdgeInsets margin,
       bool clip = false})
@@ -58,7 +58,7 @@ class Page {
 
   final BuildCallback _build;
 
-  Theme get theme => pageTheme.theme;
+  ThemeData get theme => pageTheme.theme;
 
   bool get mustRotate => pageTheme.mustRotate;
 
@@ -100,7 +100,8 @@ class Page {
             maxWidth: pageFormat.width - _margin.horizontal,
             maxHeight: pageFormat.height - _margin.vertical);
 
-    final Theme calculatedTheme = theme ?? document.theme ?? Theme.base();
+    final ThemeData calculatedTheme =
+        theme ?? document.theme ?? ThemeData.base();
     final Context context = Context(
       document: document.document,
       page: _pdfPage,

@@ -40,7 +40,7 @@ class PageTheme {
 
   final BuildCallback buildForeground;
 
-  final Theme theme;
+  final ThemeData theme;
 
   final bool clip;
 

@@ -441,26 +441,32 @@ class TextSpan extends InlineSpan {
 class RichText extends Widget {
   RichText(
       {@required this.text,
-      this.textAlign = TextAlign.left,
-      this.softWrap = true,
+      TextAlign textAlign,
+      bool softWrap,
       this.tightBounds = false,
       this.textScaleFactor = 1.0,
-      this.maxLines})
-      : assert(text != null);
+      int maxLines})
+      : assert(text != null),
+        _textAlign = textAlign,
+        _softWrap = softWrap,
+        _maxLines = maxLines;
 
   static bool debug = false;
 
   final InlineSpan text;
 
-  final TextAlign textAlign;
+  TextAlign get textAlign => _textAlign;
+  TextAlign _textAlign;
 
   final double textScaleFactor;
 
-  final bool softWrap;
+  bool get softWrap => _softWrap;
+  bool _softWrap;
 
   final bool tightBounds;
 
-  final int maxLines;
+  int get maxLines => _maxLines;
+  int _maxLines;
 
   final List<_Span> _spans = <_Span>[];
 
@@ -524,7 +530,11 @@ class RichText extends Widget {
     _spans.clear();
     _decorations.clear();
 
-    final TextStyle defaultstyle = Theme.of(context).defaultTextStyle;
+    final ThemeData theme = Theme.of(context);
+    final TextStyle defaultstyle = theme.defaultTextStyle;
+    _softWrap ??= theme.softWrap;
+    _maxLines ??= theme.maxLines;
+    _textAlign ??= theme.textAlign;
 
     final double constraintWidth = constraints.hasBoundedWidth
         ? constraints.maxWidth
@@ -821,8 +831,8 @@ class Text extends RichText {
   Text(
     String text, {
     TextStyle style,
-    TextAlign textAlign = TextAlign.left,
-    bool softWrap = true,
+    TextAlign textAlign,
+    bool softWrap,
     bool tightBounds = false,
     double textScaleFactor = 1.0,
     int maxLines,

@@ -19,8 +19,8 @@
 part of widget;
 
 @immutable
-class Theme extends Inherited {
-  factory Theme({
+class ThemeData extends Inherited {
+  factory ThemeData({
     TextStyle defaultTextStyle,
     TextStyle paragraphStyle,
     TextStyle header0,
@@ -32,8 +32,11 @@ class Theme extends Inherited {
     TextStyle bulletStyle,
     TextStyle tableHeader,
     TextStyle tableCell,
+    bool softWrap,
+    TextAlign textAlign,
+    int maxLines,
   }) {
-    final Theme base = Theme.base();
+    final ThemeData base = ThemeData.base();
     return base.copyWith(
       defaultTextStyle: defaultTextStyle,
       paragraphStyle: paragraphStyle,
@@ -46,10 +49,13 @@ class Theme extends Inherited {
       header5: header5,
       tableHeader: tableHeader,
       tableCell: tableCell,
+      softWrap: softWrap,
+      textAlign: textAlign,
+      maxLines: maxLines,
     );
   }
 
-  Theme._({
+  ThemeData._({
     @required this.defaultTextStyle,
     @required this.paragraphStyle,
     @required this.header0,
@@ -61,6 +67,9 @@ class Theme extends Inherited {
     @required this.bulletStyle,
     @required this.tableHeader,
     @required this.tableCell,
+    @required this.softWrap,
+    @required this.textAlign,
+    this.maxLines,
   })  : assert(defaultTextStyle.inherit == false),
         assert(paragraphStyle.inherit == false),
         assert(header0.inherit == false),
@@ -71,9 +80,12 @@ class Theme extends Inherited {
         assert(header5.inherit == false),
         assert(bulletStyle.inherit == false),
         assert(tableHeader.inherit == false),
-        assert(tableCell.inherit == false);
+        assert(tableCell.inherit == false),
+        assert(softWrap != null),
+        assert(maxLines == null || maxLines > 0);
 
-  factory Theme.withFont({Font base, Font bold, Font italic, Font boldItalic}) {
+  factory ThemeData.withFont(
+      {Font base, Font bold, Font italic, Font boldItalic}) {
     final TextStyle defaultStyle = TextStyle.defaultStyle().copyWith(
         font: base,
         fontNormal: base,
@@ -82,7 +94,7 @@ class Theme extends Inherited {
         fontBoldItalic: boldItalic);
     final double fontSize = defaultStyle.fontSize;
 
-    return Theme._(
+    return ThemeData._(
       defaultTextStyle: defaultStyle,
       paragraphStyle: defaultStyle.copyWith(lineSpacing: 5),
       bulletStyle: defaultStyle.copyWith(lineSpacing: 5),
@@ -95,12 +107,14 @@ class Theme extends Inherited {
       tableHeader: defaultStyle.copyWith(
           fontSize: fontSize * 0.8, fontWeight: FontWeight.bold),
       tableCell: defaultStyle.copyWith(fontSize: fontSize * 0.8),
+      softWrap: true,
+      textAlign: TextAlign.left,
     );
   }
 
-  factory Theme.base() => Theme.withFont();
+  factory ThemeData.base() => ThemeData.withFont();
 
-  Theme copyWith({
+  ThemeData copyWith({
     TextStyle defaultTextStyle,
     TextStyle paragraphStyle,
     TextStyle header0,
@@ -112,8 +126,11 @@ class Theme extends Inherited {
     TextStyle bulletStyle,
     TextStyle tableHeader,
     TextStyle tableCell,
+    bool softWrap,
+    TextAlign textAlign,
+    int maxLines,
   }) =>
-      Theme._(
+      ThemeData._(
         defaultTextStyle: this.defaultTextStyle.merge(defaultTextStyle),
         paragraphStyle: this.paragraphStyle.merge(paragraphStyle),
         bulletStyle: this.bulletStyle.merge(bulletStyle),
@@ -125,12 +142,11 @@ class Theme extends Inherited {
         header5: this.header5.merge(header5),
         tableHeader: this.tableHeader.merge(tableHeader),
         tableCell: this.tableCell.merge(tableCell),
+        softWrap: softWrap ?? this.softWrap,
+        textAlign: textAlign ?? this.textAlign,
+        maxLines: maxLines ?? this.maxLines,
       );
 
-  static Theme of(Context context) {
-    return context.inherited[Theme];
-  }
-
   final TextStyle defaultTextStyle;
 
   final TextStyle paragraphStyle;
@@ -147,4 +163,102 @@ class Theme extends Inherited {
   final TextStyle tableHeader;
 
   final TextStyle tableCell;
+
+  final TextAlign textAlign;
+  final bool softWrap;
+  final int maxLines;
+}
+
+class Theme extends StatelessWidget {
+  Theme({
+    @required this.data,
+    @required this.child,
+  })  : assert(data != null),
+        assert(child != null);
+
+  final ThemeData data;
+
+  final Widget child;
+
+  static ThemeData of(Context context) {
+    return context.inherited[ThemeData];
+  }
+
+  @Deprecated('Use ThemeData.base()')
+  static ThemeData base() => ThemeData.base();
+
+  @Deprecated('Use ThemeData.withFont()')
+  static ThemeData withFont(
+          {Font base, Font bold, Font italic, Font boldItalic}) =>
+      ThemeData.withFont(
+          base: base, bold: bold, italic: italic, boldItalic: boldItalic);
+
+  @override
+  Widget build(Context context) {
+    return InheritedWidget(
+      inherited: data,
+      build: (Context context) => child,
+    );
+  }
+}
+
+class DefaultTextStyle extends StatelessWidget implements Inherited {
+  DefaultTextStyle({
+    @required this.style,
+    @required this.child,
+    this.textAlign,
+    this.softWrap = true,
+    this.maxLines,
+  })  : assert(style != null),
+        assert(child != null),
+        assert(softWrap != null),
+        assert(maxLines == null || maxLines > 0);
+
+  static Widget merge({
+    TextStyle style,
+    TextAlign textAlign,
+    bool softWrap,
+    int maxLines,
+    @required Widget child,
+  }) {
+    assert(child != null);
+    return Builder(
+      builder: (Context context) {
+        final ThemeData parent = Theme.of(context);
+
+        return DefaultTextStyle(
+          style: parent.defaultTextStyle.merge(style),
+          textAlign: textAlign ?? parent.textAlign,
+          softWrap: softWrap ?? parent.softWrap,
+          maxLines: maxLines ?? parent.maxLines,
+          child: child,
+        );
+      },
+    );
+  }
+
+  final TextStyle style;
+
+  final Widget child;
+
+  final TextAlign textAlign;
+
+  final bool softWrap;
+
+  final int maxLines;
+
+  @override
+  Widget build(Context context) {
+    final ThemeData theme = Theme.of(context).copyWith(
+      defaultTextStyle: style,
+      textAlign: textAlign,
+      softWrap: softWrap,
+      maxLines: maxLines,
+    );
+
+    return InheritedWidget(
+      inherited: theme,
+      build: (Context context) => child,
+    );
+  }
 }

@@ -38,7 +38,7 @@ void main() {
 
     pdf = Document(
         title: 'Widgets Test',
-        theme: Theme.withFont(
+        theme: ThemeData.withFont(
           base: Font.ttf(defaultFont.buffer.asByteData()),
           bold: Font.ttf(defaultFontBold.buffer.asByteData()),
         ));

@@ -73,7 +73,7 @@ void main() {
   });
 
   test('Theme Page 1', () {
-    final Theme theme = Theme.withFont(base: roboto);
+    final ThemeData theme = ThemeData.withFont(base: roboto);
 
     pdf.addPage(Page(
       theme: theme,
@@ -84,7 +84,7 @@ void main() {
   });
 
   test('Theme Page 2', () {
-    final Theme theme = Theme.base().copyWith(
+    final ThemeData theme = ThemeData.base().copyWith(
       tableHeader: TextStyle(font: openSansBold),
       tableCell: TextStyle(font: roboto),
     );
@@ -107,11 +107,11 @@ void main() {
           mainAxisAlignment: MainAxisAlignment.spaceEvenly,
           children: <Widget>[
             Text('Hello default'),
-            InheritedWidget(
-              inherited: Theme.withFont(
+            Theme(
+              data: ThemeData.withFont(
                 base: roboto,
               ),
-              build: (Context context) => Text('Hello themed'),
+              child: Text('Hello themed'),
             ),
           ],
         ),
@@ -124,7 +124,7 @@ void main() {
         pageFormat: PdfPageFormat.a4,
         orientation: PageOrientation.portrait,
         margin: const EdgeInsets.all(8.0),
-        theme: Theme(
+        theme: ThemeData(
           defaultTextStyle: TextStyle(font: Font.courier(), fontSize: 10.0),
         ),
         build: (Context context) {