Introduce getSize String extension (#73)

* chore: Introduce StringPresentationExtensions + getSize

* chore: Add PresentationExtensions export library

* chore: Move isWithinMaxLines to presentation extensions

Author: nivisi

lib/extensions/string_extensions.dart

@@ -1,5 +1,3 @@
-import 'package:flutter/widgets.dart';
-
 extension StringExNullable on String? {
   bool get isNullOrEmpty => this == null || this!.isEmpty;
 
@@ -27,27 +25,6 @@ extension StringEx on String {
     }
   }
 
-  bool isWithinMaxLines(
-      {required int maxLines,
-      required double maxWidth,
-      double minWidth = 0.0,
-      TextStyle style = const TextStyle()}) {
-    if (isNullOrBlank) {
-      return false;
-    }
-
-    final text = TextSpan(text: this, style: style);
-    final textPainter = TextPainter(
-      maxLines: maxLines,
-      textAlign: TextAlign.left,
-      textDirection: TextDirection.ltr,
-      text: text,
-    );
-
-    textPainter.layout(minWidth: minWidth, maxWidth: maxWidth);
-    return textPainter.didExceedMaxLines;
-  }
-
   String withDate(String date) => replaceAll('[DATE]', date);
 
   String withNumber(num number) => replaceAll('[NUMBER]', number.toString());

lib/presentation/extensions/presentation_extensions.dart

@@ -0,0 +1,4 @@
+// A set of extensions that can be used on the presentation layer.
+library presentation_extensions;
+
+export 'string_presentation_extensions.dart';

lib/presentation/extensions/string_presentation_extensions.dart

@@ -0,0 +1,62 @@
+import 'package:flutter/widgets.dart';
+import 'package:flutter_template/extensions/string_extensions.dart';
+
+extension StringPresentationExtensions on String {
+  TextPainter _getTextPainter({
+    TextStyle style = const TextStyle(),
+    int maxLines = 1,
+    double minWidth = .0,
+    double maxWidth = double.infinity,
+  }) {
+    final text = TextSpan(text: this, style: style);
+    final textPainter = TextPainter(
+      maxLines: maxLines,
+      textAlign: TextAlign.left,
+      textDirection: TextDirection.ltr,
+      text: text,
+    );
+
+    textPainter.layout(minWidth: minWidth, maxWidth: maxWidth);
+    return textPainter;
+  }
+
+  Size getSize(
+    TextStyle style, {
+    int maxLines = 1,
+    double minWidth = .0,
+    double maxWidth = double.infinity,
+  }) {
+    if (isNullOrBlank) {
+      return Size.zero;
+    }
+
+    final textPainter = _getTextPainter(
+      style: style,
+      maxLines: maxLines,
+      maxWidth: maxWidth,
+      minWidth: minWidth,
+    );
+
+    return textPainter.size;
+  }
+
+  bool isWithinMaxLines({
+    required int maxLines,
+    required double maxWidth,
+    double minWidth = 0.0,
+    TextStyle style = const TextStyle(),
+  }) {
+    if (isNullOrBlank) {
+      return false;
+    }
+
+    final textPainter = _getTextPainter(
+      style: style,
+      maxLines: maxLines,
+      maxWidth: maxWidth,
+      minWidth: minWidth,
+    );
+
+    return textPainter.didExceedMaxLines;
+  }
+}