Merge remote-tracking branch 'sourcehut/customizations' into customizations

- Specify the svg and xlink namespaces to the `xml->sxml' procedure so that it
  doesn't include them in full for each tag.
- For the default `pre-post-order' handler strip the `svg:' prefix if found.
- Strip the `svg:' namespace from the SVG element and insert the `xmlns' and
  `xmlns:xlink' namespace definition attributes into the attributes.

This is all very brittle and badly done, but for the moment this fixes my
use-case of wanting to display SVG images embedded in the HTML.

tekuti/filters.scm

@@ -81,15 +81,24 @@
 
 (define (wordpress->sxml text)
   (let ((sxml (cadr (with-input-from-string* (string-append "<div>" text "</div>")
-                      xml->sxml))))
+                      (lambda () (xml->sxml #:namespaces '((svg . "http://www.w3.org/2000/svg"))))))))
     (pre-post-order
      sxml
      `((*default* . ,(lambda (tag . body)
-                       (if (can-contain-p? tag)
-                           (wpautop tag body)
-                           (cons tag body))))
+                       (let ((tag (if (string-prefix? "svg:" (symbol->string tag))
+                                      (string->symbol (substring (symbol->string tag) 4))
+                                      tag)))
+                         (if (can-contain-p? tag)
+                             (wpautop tag body)
+                             (cons tag body)))))
        (*text* . ,(lambda (tag text)
-                    text))))))
+                    text))
+       (svg:svg . ,(lambda (tag . body)
+                     (cons 'svg
+                           (cons `(@ (xmlns "http://www.w3.org/2000/svg")
+                                     (xmlns:xlink "http://www.w3.org/1999/xlink")
+                                     ,@(cdar body))
+                                 (cdr body)))))))))
 
 (define (marxdown->sxml text)
   (smarxdown->shtml (call-with-input-string text marxdown->smarxdown)))

tekuti/page.scm

@@ -301,10 +301,13 @@
                        (post-from-key index key))
                      (hash-ref tags tag '()))))
     (if (pair? posts)
-        (respond `(,(tag-sidebar tag index)
-                   (h2 "posts tagged \"" ,tag "\"")
-                   ,@(map (lambda (post) (show-post post #f))
-                          (take-max (reverse posts) 10)))
+        (respond `((h2 "posts tagged \"" ,tag "\" ("
+                       ,(rellink '("feed" "atom") "feed"
+                                 #:query `(("with" . ,tag)))
+                       ")")
+                   ,@(map (lambda (post) `(p ,(post-link post)))
+                          (take-max (reverse posts) 10))
+                   ,(related-tag-cloud tag index))
                  #:etag (assq-ref index 'master)
                  #:title (string-append "posts tagged \"" tag "\""))
         (respond `((h2 "Unknown tag " ,tag)