Use paragraph getter in TextPainter (#127607)

packages/flutter/lib/src/painting/text_painter.dart

@@ -369,6 +369,7 @@ class _TextPainterLayoutCacheWithOffset {
       TextWidthBasis.parent => clampDouble(layout.maxIntrinsicLineExtent, minWidth, maxWidth),
     };
   }
+
   // Try to resize the contentWidth to fit the new input constraints, by just
   // adjusting the paint offset (so no line-breaking changes needed).
   //
@@ -398,8 +399,8 @@ class _TextPainterLayoutCacheWithOffset {
       assert(paragraph.width == double.infinity);
       return false;
     }
-    final double maxIntrinsicWidth = layout._paragraph.maxIntrinsicWidth;
-    if ((layout._paragraph.width - maxIntrinsicWidth) > -precisionErrorTolerance && (maxWidth - maxIntrinsicWidth) > -precisionErrorTolerance) {
+    final double maxIntrinsicWidth = paragraph.maxIntrinsicWidth;
+    if ((paragraph.width - maxIntrinsicWidth) > -precisionErrorTolerance && (maxWidth - maxIntrinsicWidth) > -precisionErrorTolerance) {
       // Adjust the paintOffset and contentWidth to the new input constraints.
       contentWidth = newContentWidth;
       return true;
@@ -889,7 +890,7 @@ class TextPainter {
         if (span is PlaceholderSpan) {
           placeholderCount += 1;
         }
-        return value.length >= placeholderCount ;
+        return value.length >= placeholderCount;
       });
       return placeholderCount == value.length;
     }());
@@ -1129,7 +1130,7 @@ class TextPainter {
         return true;
       }());
 
-      final ui.Paragraph paragraph = layoutCache.layout._paragraph;
+      final ui.Paragraph paragraph = layoutCache.paragraph;
       // Unfortunately even if we know that there is only paint changes, there's
       // no API to only make those updates so the paragraph has to be recreated
       // and re-laid out.