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Add syntax highlighing feature to egui_extras (#3333)

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* Add syntax highlighing feature to egui_extras

Enable "syntect" feature for great syntax highlighting of any language.

If not a simple fallback is used that works fine for C++, Rust, Python

* Check --no-default-features of egui_extras on CI

* spelling

* Fix building egui_extras without additional features
This commit is contained in:
Emil Ernerfeldt
2023-09-13 20:39:40 +02:00
committed by GitHub
parent 4b5146d35d
commit 5e785ae00a
15 changed files with 307 additions and 98 deletions
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12
crates/egui_demo_app/src/apps/http_app.rs
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@@ -223,25 +223,19 @@ fn selectable_text(ui: &mut egui::Ui, mut text: &str) {
// ----------------------------------------------------------------------------
// Syntax highlighting:
#[cfg(feature = "syntect")]
fn syntax_highlighting(
ctx: &egui::Context,
response: &ehttp::Response,
text: &str,
) -> Option<ColoredText> {
let extension_and_rest: Vec<&str> = response.url.rsplitn(2, '.').collect();
let extension = extension_and_rest.get(0)?;
let theme = crate::syntax_highlighting::CodeTheme::from_style(&ctx.style());
Some(ColoredText(crate::syntax_highlighting::highlight(
let extension = extension_and_rest.first()?;
let theme = egui_extras::syntax_highlighting::CodeTheme::from_style(&ctx.style());
Some(ColoredText(egui_extras::syntax_highlighting::highlight(
ctx, &theme, text, extension,
)))
}
#[cfg(not(feature = "syntect"))]
fn syntax_highlighting(_ctx: &egui::Context, _: &ehttp::Response, _: &str) -> Option<ColoredText> {
None
}
struct ColoredText(egui::text::LayoutJob);
impl ColoredText {