Migrate relative links to absolute in embedded markdown (#867)

Signed-off-by: Martin Mihálek <aenniw@gmail.com>

src/core/render/compiler/link.js

@@ -19,6 +19,10 @@ export const linkCompiler = ({ renderer, router, linkTarget, compilerClass }) =>
 
       href = router.toURL(href, null, router.getCurrentPath());
     } else {
+      if (!isAbsolutePath(href) && href.startsWith('./')) {
+        href =
+          document.URL.replace(/\/(?!.*\/).*/, '/').replace('#/./', '') + href;
+      }
       attrs.push(href.indexOf('mailto:') === 0 ? '' : `target="${linkTarget}"`);
     }
 

src/core/render/embed.js

@@ -19,6 +19,23 @@ function walkFetchEmbed({ embedTokens, compile, fetch }, cb) {
         let embedToken;
         if (text) {
           if (token.embed.type === 'markdown') {
+            let path = token.embed.url.split('/');
+            path.pop();
+            path = path.join('/');
+            // Resolves relative links to absolute
+            text = text.replace(/\[([^[\]]+)\]\(([^)]+)\)/g, x => {
+              const linkBeginIndex = x.indexOf('(');
+              if (x.substring(linkBeginIndex).startsWith('(.')) {
+                return (
+                  x.substring(0, linkBeginIndex) +
+                  `(${window.location.protocol}//${window.location.host}${path}/` +
+                  x.substring(linkBeginIndex + 1, x.length - 1) +
+                  ')'
+                );
+              }
+              return x;
+            });
+
             embedToken = compile.lexer(text);
           } else if (token.embed.type === 'code') {
             if (token.embed.fragment) {