From: Paul Hänsch <paul@plutz.net>
Date: Mon, 9 Oct 2023 12:01:03 +0000 (+0200)
Subject: force ALT-text for images
X-Git-Url: http://git.plutz.net/?p=cgilite;a=commitdiff_plain;h=1e12e80fbfed62596f992d0939418059174c4928

force ALT-text for images
---

diff --git a/markdown.awk b/markdown.awk
index 75f1827..249f507 100755
--- a/markdown.awk
+++ b/markdown.awk
@@ -231,9 +231,10 @@ function inline( line, LOCAL, len, text, code, href, guard ) {
     else if ( match(title, /^'.*'$/) ) { sub(/^'/, "", title); sub(/'$/, "", title); }
     else if ( match(title, /^\(.*\)$/) ) { sub(/^\(/, "", title); sub(/\)$/, "", title); }
 
-    gsub(/\\/, "", href); gsub(/\\/, "", title); gsub(/[\n\t]+/, " ", title);
+    gsub(/^[\t ]+$/, "", text); gsub(/\\/, "", href);
+    gsub(/\\/, "", title); gsub(/[\n\t]+/, " ", title);
 
-    return "<img src=\"" URL(href, 1) "\" alt=\"" HTML(text) "\"" \
+    return "<img src=\"" URL(href, 1) "\" alt=\"" HTML(text?text:title?title:href) "\"" \
            (title?" title=\"" HTML(title) "\"":"") (attrib?" class=\"" HTML(attrib) "\"":"") \
            ">" inline( substr( line, len + 1) );
 
@@ -660,10 +661,10 @@ function _block( block, LOCAL, st, len, text, title, attrib, href, guard, code,
     else if ( match(title, /^'.*'$/) ) { sub(/^'/, "", title); sub(/'$/, "", title); }
     else if ( match(title, /^\(.*\)$/) ) { sub(/^\(/, "", title); sub(/\)$/, "", title); }
 
-    gsub(/\\/, "", href);
+    gsub(/^[\t ]+$/, "", text); gsub(/\\/, "", href);
 
     return "<figure data-src=\"" URL(href, 1) "\"" (attrib?" class=\"" HTML(attrib) "\"":"") ">" \
-           "<img src=\"" URL(href, 1) "\" alt=\"" HTML(text) "\"" \
+           "<img src=\"" URL(href, 1) "\" alt=\"" HTML(text?text:title?title:href) "\"" \
            (attrib?" class=\"" HTML(attrib) "\"":"") ">" \
            (title?"<figcaption>" inline(title) "</figcaption>":"") \
            "</figure>\n\n" \