Make basic text shaping the default shaping strategy

core/src/widget/text.rs

@@ -25,6 +25,7 @@ where
     vertical_alignment: alignment::Vertical,
     font: Option<Renderer::Font>,
     style: <Renderer::Theme as StyleSheet>::Style,
+    advanced_shape: bool,
 }
 
 impl<'a, Renderer> Text<'a, Renderer>
@@ -43,6 +44,7 @@ where
             horizontal_alignment: alignment::Horizontal::Left,
             vertical_alignment: alignment::Vertical::Top,
             style: Default::default(),
+            advanced_shape: false,
         }
     }
 
@@ -98,6 +100,20 @@ where
         self.vertical_alignment = alignment;
         self
     }
+
+    /// Enables advanced text shaping and font fallback for the [`Text`].
+    ///
+    /// You will need to enable this if the text contains a complex script, the
+    /// font used needs it, and/or multiple fonts in your system may be needed
+    /// to display all of the glyphs.
+    ///
+    /// If your text isn't displaying properly, try enabling this!
+    ///
+    /// Advanced shaping is expensive! You should only enable it when necessary.
+    pub fn advanced_shape(mut self) -> Self {
+        self.advanced_shape = true;
+        self
+    }
 }
 
 impl<'a, Message, Renderer> Widget<Message, Renderer> for Text<'a, Renderer>
@@ -129,6 +145,7 @@ where
             size,
             self.font.unwrap_or_else(|| renderer.default_font()),
             bounds,
+            self.advanced_shape,
         );
 
         let size = limits.resolve(Size::new(width, height));
@@ -156,6 +173,7 @@ where
             theme.appearance(self.style.clone()),
             self.horizontal_alignment,
             self.vertical_alignment,
+            self.advanced_shape,
         );
     }
 }
@@ -180,6 +198,7 @@ pub fn draw<Renderer>(
     appearance: Appearance,
     horizontal_alignment: alignment::Horizontal,
     vertical_alignment: alignment::Vertical,
+    advanced_shape: bool,
 ) where
     Renderer: text::Renderer,
 {
@@ -205,6 +224,7 @@ pub fn draw<Renderer>(
         font: font.unwrap_or_else(|| renderer.default_font()),
         horizontal_alignment,
         vertical_alignment,
+        advanced_shape,
     });
 }
 
@@ -234,6 +254,7 @@ where
             vertical_alignment: self.vertical_alignment,
             font: self.font,
             style: self.style.clone(),
+            advanced_shape: self.advanced_shape,
         }
     }
 }