Implement proper TextFieldModel minimum size computation.

Author: SaadArdati

lib/src/api/models/box_constraints.dart

@@ -49,6 +49,20 @@ class BoxConstraintsModel with EquatableMixin, SerializableMixin {
         maxHeight: maxHeight,
       );
 
+  /// Returns new box constraints that are smaller by the given edge dimensions.
+  BoxConstraintsModel deflate(EdgeInsetsModel edges) {
+    final double horizontal = edges.horizontal;
+    final double vertical = edges.vertical;
+    final double deflatedMinWidth = max(0.0, minWidth! - horizontal);
+    final double deflatedMinHeight = max(0.0, minHeight! - vertical);
+    return BoxConstraintsModel(
+      minWidth: deflatedMinWidth,
+      maxWidth: max(deflatedMinWidth, maxWidth! - horizontal),
+      minHeight: deflatedMinHeight,
+      maxHeight: max(deflatedMinHeight, maxHeight! - vertical),
+    );
+  }
+
   /// Duplicates instance of this class with given [minWidth] value override.
   BoxConstraintsModel updateMinWidth(double? value) => BoxConstraintsModel(
         minWidth: value,
@@ -87,6 +101,8 @@ class BoxConstraintsModel with EquatableMixin, SerializableMixin {
     return BoxConstraintsModel(
       maxWidth: maxWidth,
       maxHeight: maxHeight,
+      minWidth: 0,
+      minHeight: 0,
     );
   }
 

lib/src/api/models/input_border.dart

@@ -20,7 +20,16 @@ enum BorderTypeEnum {
   outline,
 
   /// Border under the input field.
-  underline,
+  underline;
+
+  /// A convenience getter to check if this border type is outline.
+  bool get isOutline => this == BorderTypeEnum.outline;
+
+  /// A convenience getter to check if this border type is underline.
+  bool get isUnderline => this == BorderTypeEnum.underline;
+
+  /// A convenience getter to check if this border type is none.
+  bool get isNone => this == BorderTypeEnum.none;
 }
 
 /// Represents decoration for an input border.
@@ -39,6 +48,15 @@ class InputBorderModel with EquatableMixin, SerializableMixin {
   /// [InputDecoration.labelText] width gap.
   final double gapPadding;
 
+  /// A convenience getter to check if this border is outline.
+  bool get isOutline => borderType.isOutline;
+
+  /// A convenience getter to check if this border is underline.
+  bool get isUnderline => borderType.isUnderline;
+
+  /// A convenience getter to check if this border is none.
+  bool get isNone => borderType.isNone;
+
   /// Creates an instance of input border model.
   const InputBorderModel({
     this.borderType = BorderTypeEnum.outline,

lib/src/api/utils.dart

@@ -23,10 +23,6 @@ abstract class ITextSizeCalculator {
   /// The details are dependant on the implementation.
   double getHeightForWidth(double width);
 
-  /// Returns the width of a defined [TextNode] based on its height.
-  /// The details are dependant on the implementation.
-  double getWidthForHeight(double height, double fallbackWidth);
-
   /// Returns The minimum possible width of a defined [TextNode].
   /// The details are dependant on the implementation.
   double getMinWidth();
@@ -40,17 +36,10 @@ abstract class ITextSizeCalculator {
   /// The details are dependant on the implementation.
   double getBestTextWidthAtCurrentNodeBox(double internalBoxWidth);
 
-  /// Returns The minimum height of a defined [TextNode].
-  /// The details are dependant on the implementation.
-  double getMinHeight();
-
   /// Returns The distance to the [baseline] of a defined [TextNode].
   /// The details are dependant on the implementation.
   double computeDistanceToActualBaseline(CTextBaseline baseline);
 
-  /// Returns the line height of a single line of text.
-  double getLineHeight();
-
   /// Disposes of this calculator.
   void dispose();
 }