fix(ui): import for_launcher where links are followed

crates/ui-egui/src/canvas/input.rs

@@ -1,5 +1,5 @@
 use super::balloons::over_balloon;
-use super::links::{field_showing_code, is_followable_link, is_generated_bookmark_link, link_under};
+use super::links::{field_showing_code, for_launcher, is_followable_link, is_generated_bookmark_link, link_under};
 use super::navigation::page_at;
 use super::story::{enters_header_footer, in_text_box, part_kind, text_box_host};
 use super::{CanvasState, DocLayout, PartKind, Pos, Pos2, Rect, StoryRef, Ui, WordApp, json};
@@ -335,7 +335,7 @@ fn handle_primary_press(
                 let _ = app.run("select.collapse", json!({}));
             }
         } else if is_followable_link(&link) {
-            app.canvas.open_url = Some(link);
+            app.canvas.open_url = Some(for_launcher(&link));
         } else {
             app.status(tl!("Only web (http, https) and email (mailto) links can be followed"));
         }

crates/ui-egui/src/canvas/links.rs

@@ -48,3 +48,19 @@ pub(super) fn is_generated_bookmark_link(link: &str) -> bool {
 pub(super) fn is_followable_link(url: &str) -> bool {
     wordcraft_doc::link::is_web_or_mail_link(url)
 }
+
+/// `url` as it is handed to the system to open: the characters a Windows command line acts on
+/// (`|`, `<`, `>`, `(`, `)`, `^`, `!`, `"`, and spaces) percent-encoded, which a browser reads the
+/// same. Under WSL the browser crate starts the link through `cmd.exe /c start`, escaping only
+/// `^` and `&`, so `https://x/a|calc` would run `calc`. `&` is left alone: it separates a query's
+/// fields, and that launcher escapes it.
+pub(super) fn for_launcher(url: &str) -> String {
+    let mut out = String::with_capacity(url.len());
+    for c in url.chars() {
+        match c {
+            '|' | '<' | '>' | '(' | ')' | '^' | '!' | '"' | ' ' => out.push_str(&format!("%{:02X}", c as u32)),
+            c => out.push(c),
+        }
+    }
+    out
+}

crates/ui-egui/src/canvas/tests.rs

@@ -2646,6 +2646,17 @@ fn only_web_and_email_links_are_followed() {
     }
 }
 
+#[test]
+fn followed_links_reach_the_launcher_without_command_line_syntax() {
+    use super::links::for_launcher;
+    assert_eq!(for_launcher("https://x.example/a|calc"), "https://x.example/a%7Ccalc");
+    assert_eq!(for_launcher("https://x.example/a^b<c>d(e)f!g\"h i"), "https://x.example/a%5Eb%3Cc%3Ed%28e%29f%21g%22h%20i");
+    // Ordinary links, queries and existing escapes are unchanged.
+    for ok in ["https://example.com/a?b=1&c=2#d", "mailto:someone@example.com", "https://example.com/caf%C3%A9"] {
+        assert_eq!(for_launcher(ok), ok);
+    }
+}
+
 /// Ctrl+click on a link to a bookmark puts the caret at the bookmark's start, as Word does;
 /// only Go To selects the bookmark's text (#1236).
 #[test]