Add TextAlign.start and TextAlign.end and fix Line.realign accordingly

change widgets geometry to directional geometry

pdf/lib/src/widgets/content.dart

@@ -330,9 +330,9 @@ class Footer extends StatelessWidget {
 
   final Widget? trailing;
 
-  final EdgeInsets? margin;
+  final EdgeInsetsGeometry? margin;
 
-  final EdgeInsets? padding;
+  final EdgeInsetsGeometry? padding;
 
   final BoxDecoration? decoration;
 

pdf/lib/src/widgets/decoration.dart

@@ -113,10 +113,10 @@ class LinearGradient extends Gradient {
   }) : super(colors: colors, stops: stops);
 
   /// The offset at which stop 0.0 of the gradient is placed.
-  final Alignment begin;
+  final AlignmentGeometry begin;
 
   /// The offset at which stop 1.0 of the gradient is placed.
-  final Alignment end;
+  final AlignmentGeometry end;
 
   /// How this gradient should tile the plane beyond in the region before
   final TileMode tileMode;
@@ -134,7 +134,7 @@ class LinearGradient extends Gradient {
     }
 
     assert(stops == null || stops!.length == colors.length);
-
+    final textDirection = Directionality.of(context);
     context.canvas
       ..saveContext()
       ..clipPath()
@@ -148,8 +148,8 @@ class LinearGradient extends Gradient {
             colors,
             stops,
           ),
-          start: begin.withinRect(box),
-          end: end.withinRect(box),
+          start: begin.resolve(textDirection).withinRect(box),
+          end: end.resolve(textDirection).withinRect(box),
           extendStart: true,
           extendEnd: true,
         ),
@@ -175,7 +175,7 @@ class RadialGradient extends Gradient {
   }) : super(colors: colors, stops: stops);
 
   /// The center of the gradient
-  final Alignment center;
+  final AlignmentGeometry center;
 
   /// The radius of the gradient
   final double radius;
@@ -185,7 +185,7 @@ class RadialGradient extends Gradient {
   final TileMode tileMode;
 
   /// The focal point of the gradient.
-  final Alignment? focal;
+  final AlignmentGeometry? focal;
 
   /// The radius of the focal point of the gradient.
   final double focalRadius;
@@ -207,7 +207,7 @@ class RadialGradient extends Gradient {
     final _focal = focal ?? center;
 
     final _radius = math.min(box.width, box.height);
-
+  final textDirection = Directionality.of(context);
     context.canvas
       ..saveContext()
       ..clipPath()
@@ -221,8 +221,8 @@ class RadialGradient extends Gradient {
             colors,
             stops,
           ),
-          start: _focal.withinRect(box),
-          end: center.withinRect(box),
+          start: _focal.resolve(textDirection).withinRect(box),
+          end: center.resolve(textDirection).withinRect(box),
           radius0: focalRadius * _radius,
           radius1: radius * _radius,
           extendStart: true,

pdf/lib/src/widgets/forms.dart

@@ -227,7 +227,7 @@ class FlatButton extends SingleChildWidget with AnnotationAppearance {
     PdfColor color = PdfColors.blue,
     PdfColor colorDown = PdfColors.red,
     PdfColor colorRollover = PdfColors.blueAccent,
-    EdgeInsets? padding,
+    EdgeInsetsGeometry? padding,
     BoxDecoration? decoration,
     this.flags,
     required Widget child,

pdf/lib/src/widgets/page_theme.dart

@@ -59,13 +59,13 @@ class PageTheme {
 
   EdgeInsetsGeometry? get margin {
     if (_margin != null) {
-      final effectiveMargin = _margin!.resolve(textDirection);
+      final resolvedMargin = _margin!.resolve(textDirection);
       if (mustRotate) {
         return EdgeInsets.fromLTRB(
-          effectiveMargin.bottom,
-          effectiveMargin.left,
-          effectiveMargin.top,
-          effectiveMargin.right,
+          resolvedMargin.bottom,
+          resolvedMargin.left,
+          resolvedMargin.top,
+          resolvedMargin.right,
         );
       } else {
         return _margin;

pdf/lib/src/widgets/table_helper.dart

@@ -40,8 +40,8 @@ mixin TableHelper {
     required List<List<dynamic>> data,
     EdgeInsetsGeometry cellPadding = const EdgeInsets.all(5),
     double cellHeight = 0,
-    Alignment cellAlignment = Alignment.topLeft,
-    Map<int, Alignment>? cellAlignments,
+    AlignmentGeometry cellAlignment = Alignment.topLeft,
+    Map<int, AlignmentGeometry>? cellAlignments,
     TextStyle? cellStyle,
     TextStyle? oddCellStyle,
     OnCellFormat? cellFormat,
@@ -50,8 +50,8 @@ mixin TableHelper {
     List<dynamic>? headers,
     EdgeInsetsGeometry? headerPadding,
     double? headerHeight,
-    Alignment headerAlignment = Alignment.center,
-    Map<int, Alignment>? headerAlignments,
+    AlignmentGeometry headerAlignment = Alignment.center,
+    Map<int, AlignmentGeometry>? headerAlignments,
     TextStyle? headerStyle,
     OnCellFormat? headerFormat,
     TableBorder? border = const TableBorder(
@@ -120,14 +120,14 @@ mixin TableHelper {
       rowNum++;
     }
 
+     final textDirection =  context == null ? TextDirection.ltr : Directionality.of(context);
     for (final row in data) {
       final tableRow = <Widget>[];
       final isOdd = (rowNum - headerCount) % 2 != 0;
-
       if (rowNum < headerCount) {
         for (final dynamic cell in row) {
           final align = headerAlignments[tableRow.length] ?? headerAlignment;
-          final textAlign = _textAlign(align);
+          final textAlign = _textAlign(align.resolve(textDirection));
 
           tableRow.add(
             Container(
@@ -165,7 +165,7 @@ mixin TableHelper {
                           ? cell.toString()
                           : cellFormat(tableRow.length, cell),
                       style: isOdd ? oddCellStyle : cellStyle,
-                      textAlign: _textAlign(align),
+                      textAlign: _textAlign(align.resolve(textDirection)),
                       textDirection: tableDirection,
                     ),
             ),