Fix looking up clickable URLs in code viewer

Related issue:
- uBlockOrigin/uBlock-issues#2759

src/js/code-viewer.js

@@ -284,7 +284,25 @@ async function start() {
  });
 
  dom.on('#content', 'click', '.cm-href', ev => {
- setURL(ev.target.textContent);
+ const target = ev.target;
+ const urlParts = [ target.textContent ];
+ let previous = target;
+ for (;;) {
+ previous = previous.previousSibling;
+ if ( previous === null ) { break; }
+ if ( previous.nodeType !== 1 ) { break; }
+ if ( previous.classList.contains('cm-href') === false ) { break; }
+ urlParts.unshift(previous.textContent);
+ }
+ let next = target;
+ for (;;) {
+ next = next.nextSibling;
+ if ( next === null ) { break; }
+ if ( next.nodeType !== 1 ) { break; }
+ if ( next.classList.contains('cm-href') === false ) { break; }
+ urlParts.push(next.textContent);
+ }
+ setURL(urlParts.join(''));
  });
 }