Fix empty lines text gap

 # Changelog
 
+## 3.10.7
+
+- Fix empty lines text gap
+
 ## 3.10.6
 
 - Update bidi dependency

@@ -19,9 +19,10 @@
 import 'dart:convert';
 import 'dart:math' as math;
 import 'dart:typed_data';
+
 import 'package:meta/meta.dart';
-import 'bidi_utils.dart' as bidi;
 
+import 'bidi_utils.dart' as bidi;
 import 'font_metrics.dart';
 
 enum TtfParserName {
@@ -192,6 +193,8 @@ class TtfParser {
 
   int get descent => bytes.getInt16(tableOffsets[hhea_table]! + 6);
 
+  int get lineGap => bytes.getInt16(tableOffsets[hhea_table]! + 8);
+
   int get numOfLongHorMetrics =>
       bytes.getUint16(tableOffsets[hhea_table]! + 34);
 

@@ -282,6 +282,9 @@ See https://github.com/DavBfr/dart_pdf/wiki/Fonts-Management
   /// Spans the distance between the baseline and the lowest descending glyph
   double get descent;
 
+  /// Height of an empty line
+  double get lineGap => ascent + descent;
+
   /// Internal units per
   int get unitsPerEm;
 

@@ -1041,7 +1041,7 @@ class RichText extends Widget with SpanningWidget {
               if (spanCount > 0) {
                 offsetY += bottom - top;
               } else {
-                offsetY += space.ascent + space.descent;
+                offsetY += font.lineGap * style.fontSize! * textScaleFactor;
               }
               top = 0;
               bottom = 0;

@@ -12,7 +12,7 @@ topics:
   - print
   - printing
   - report
-version: 3.10.6
+version: 3.10.7
 
 environment:
   sdk: ">=2.18.0 <4.0.0"