Simplify highlight method for text_editor widget

examples/editor/src/main.rs

@@ -1,4 +1,4 @@
-use iced::highlighter::{self, Highlighter};
+use iced::highlighter;
 use iced::keyboard;
 use iced::widget::{
     button, column, container, horizontal_space, pick_list, row, text,
@@ -186,18 +186,13 @@ impl Editor {
             text_editor(&self.content)
                 .height(Fill)
                 .on_action(Message::ActionPerformed)
-                .highlight::<Highlighter>(
+                .highlight(
-                    highlighter::Settings {
+                    self.file
-                        theme: self.theme,
+                        .as_deref()
-                        token: self
+                        .and_then(Path::extension)
-                            .file
+                        .and_then(ffi::OsStr::to_str)
-                            .as_deref()
+                        .unwrap_or("rs"),
-                            .and_then(Path::extension)
+                    self.theme,
-                            .and_then(ffi::OsStr::to_str)
-                            .map(str::to_string)
-                            .unwrap_or(String::from("rs")),
-                    },
-                    |highlight, _theme| highlight.to_format()
                 ),
             status,
         ]

examples/markdown/src/main.rs

@@ -1,4 +1,4 @@
-use iced::highlighter::{self, Highlighter};
+use iced::highlighter;
 use iced::widget::{self, markdown, row, scrollable, text_editor};
 use iced::{Element, Fill, Font, Task, Theme};
 
@@ -65,13 +65,7 @@ impl Markdown {
             .height(Fill)
             .padding(10)
             .font(Font::MONOSPACE)
-            .highlight::<Highlighter>(
+            .highlight("markdown", highlighter::Theme::Base16Ocean);
-                highlighter::Settings {
-                    theme: highlighter::Theme::Base16Ocean,
-                    token: "markdown".to_owned(),
-                },
-                |highlight, _theme| highlight.to_format(),
-            );
 
         let preview = markdown(&self.items, markdown::Settings::default())
             .map(Message::LinkClicked);

widget/src/text_editor.rs

@@ -13,7 +13,7 @@ use crate::core::text::{self, LineHeight, Text};
 use crate::core::widget::operation;
 use crate::core::widget::{self, Widget};
 use crate::core::{
-    Background, Border, Color, Element, Length, Padding, Pixels, Point,
+    self, Background, Border, Color, Element, Length, Padding, Pixels, Point,
     Rectangle, Shell, Size, SmolStr, Theme, Vector,
 };
 
@@ -146,9 +146,28 @@ where
         self
     }
 
+    /// Highlights the [`TextEditor`] using the given syntax and theme.
+    #[cfg(feature = "highlighter")]
+    pub fn highlight(
+        self,
+        syntax: &str,
+        theme: iced_highlighter::Theme,
+    ) -> TextEditor<'a, iced_highlighter::Highlighter, Message, Theme, Renderer>
+    where
+        Renderer: text::Renderer<Font = core::Font>,
+    {
+        self.highlight_with::<iced_highlighter::Highlighter>(
+            iced_highlighter::Settings {
+                theme,
+                token: syntax.to_owned(),
+            },
+            |highlight, _theme| highlight.to_format(),
+        )
+    }
+
     /// Highlights the [`TextEditor`] with the given [`Highlighter`] and
     /// a strategy to turn its highlights into some text format.
-    pub fn highlight<H: text::Highlighter>(
+    pub fn highlight_with<H: text::Highlighter>(
         self,
         settings: H::Settings,
         to_format: fn(