Add interactive example for easier testing

egui_commonmark/examples/interactive.rs

@@ -0,0 +1,71 @@
+//! Make sure to run this example from the repo directory and not the example
+//! directory. To see all the features in full effect, run this example with
+//! `cargo r --features better_syntax_highlighting,svg,fetch`
+//! Add `light` or `dark` to the end of the command to specify theme. Default
+//! is system theme. `cargo r --features better_syntax_highlighting,svg,fetch -- dark`
+//!
+//! An easy way to visualize rendered markdown interactively
+
+use eframe::egui;
+use egui_commonmark::*;
+
+struct App {
+    cache: CommonMarkCache,
+    markdown: String,
+}
+
+impl eframe::App for App {
+    fn update(&mut self, ctx: &egui::Context, _frame: &mut eframe::Frame) {
+        egui::CentralPanel::default().show(ctx, |ui| {
+            egui::SidePanel::left("left_panel")
+                .show_inside(ui, |ui| ui.text_edit_multiline(&mut self.markdown));
+            egui::CentralPanel::default().show_inside(ui, |ui| {
+                egui::ScrollArea::vertical().show(ui, |ui| {
+                    CommonMarkViewer::new("viewer").show(ui, &mut self.cache, &self.markdown);
+                });
+            });
+        });
+    }
+}
+
+fn main() -> eframe::Result {
+    let mut args = std::env::args();
+    args.next();
+
+    eframe::run_native(
+        "Interactive markdown viewer",
+        eframe::NativeOptions::default(),
+        Box::new(move |cc| {
+            if let Some(theme) = args.next() {
+                if theme == "light" {
+                    cc.egui_ctx.set_visuals(egui::Visuals::light());
+                } else if theme == "dark" {
+                    cc.egui_ctx.set_visuals(egui::Visuals::dark());
+                }
+            }
+
+            cc.egui_ctx.style_mut(|style| {
+                // Show the url of a hyperlink on hover
+                style.url_in_tooltip = true;
+            });
+
+            Ok(Box::new(App {
+                markdown: r#"# Heading
+
+text with a \
+break
+
+text with a large
+
+separator
+
+```python
+if __name__ == "__main__":
+    pass
+```"#
+                    .to_owned(),
+                cache: CommonMarkCache::default(),
+            }))
+        }),
+    )
+}