Text field vertical align (#34355)

Adds the `textAlignVertical` param to TextField and InputDecorator, allowing arbitrary vertical positioning of text in its input.

packages/flutter/lib/src/material/text_field.dart

@@ -149,6 +149,7 @@ class TextField extends StatefulWidget {
     this.style,
     this.strutStyle,
     this.textAlign = TextAlign.start,
+    this.textAlignVertical,
     this.textDirection,
     this.readOnly = false,
     this.showCursor,
@@ -278,6 +279,9 @@ class TextField extends StatefulWidget {
   /// {@macro flutter.widgets.editableText.textAlign}
   final TextAlign textAlign;
 
+  /// {@macro flutter.material.inputDecorator.textAlignVertical}
+  final TextAlignVertical textAlignVertical;
+
   /// {@macro flutter.widgets.editableText.textDirection}
   final TextDirection textDirection;
 
@@ -506,6 +510,7 @@ class TextField extends StatefulWidget {
     properties.add(EnumProperty<TextInputAction>('textInputAction', textInputAction, defaultValue: null));
     properties.add(EnumProperty<TextCapitalization>('textCapitalization', textCapitalization, defaultValue: TextCapitalization.none));
     properties.add(EnumProperty<TextAlign>('textAlign', textAlign, defaultValue: TextAlign.start));
+    properties.add(DiagnosticsProperty<TextAlignVertical>('textAlignVertical', textAlignVertical, defaultValue: null));
     properties.add(EnumProperty<TextDirection>('textDirection', textDirection, defaultValue: null));
     properties.add(DoubleProperty('cursorWidth', cursorWidth, defaultValue: 2.0));
     properties.add(DiagnosticsProperty<Radius>('cursorRadius', cursorRadius, defaultValue: null));
@@ -1009,6 +1014,7 @@ class _TextFieldState extends State<TextField> with AutomaticKeepAliveClientMixi
             decoration: _getEffectiveDecoration(),
             baseStyle: widget.style,
             textAlign: widget.textAlign,
+            textAlignVertical: widget.textAlignVertical,
             isHovering: _isHovering,
             isFocused: focusNode.hasFocus,
             isEmpty: controller.value.text.isEmpty,

packages/flutter/lib/src/rendering/object.dart

@@ -2153,8 +2153,9 @@ abstract class RenderObject extends AbstractNode with DiagnosticableTreeMixin im
       renderers.add(renderer);
     }
     final Matrix4 transform = Matrix4.identity();
-    for (int index = renderers.length - 1; index > 0; index -= 1)
+    for (int index = renderers.length - 1; index > 0; index -= 1) {
       renderers[index].applyPaintTransform(renderers[index - 1], transform);
+    }
     return transform;
   }