Fix exporting #+toc keyword with 'local'

Fixes #183.

ox-hugo.el

@@ -1025,12 +1025,21 @@ When optional argument LOCAL is non-nil, build a table of
 contents according to the current headline."
   (let* ((toc-headline
           (unless local
-            (format "\n<div class=\"heading\">%s</div>\n\n"
+            (format "\n<div class=\"heading\">%s</div>\n"
                     (org-html--translate "Table of Contents" info))))
+         (current-level nil)
          (toc-items
           (mapconcat
            (lambda (headline)
-             (let* ((level (org-export-get-relative-level headline info))
+             (let* ((level-raw (org-export-get-relative-level headline info))
+                    (current-level-inner (progn
+                                           (unless current-level
+                                             (setq current-level level-raw))
+                                           current-level))
+                    (relative-level (1+ (- level-raw current-level-inner)))
+                    (level (if local
+                               relative-level
+                             level-raw))
                     (indentation (make-string (* 4 (1- level)) ?\s))
                     (todo (and (org-hugo--plist-get-true-p info :with-todo-keywords)
                                (org-element-property :todo-keyword headline)))
@@ -1060,7 +1069,10 @@ contents according to the current headline."
                                  (and tags
                                       (format ":%s:"
                                               (mapconcat #'identity tags ":")))))))
+               ;; (message "[ox-hugo build-toc DBG] current-level-inner:%d relative-level:%d"
+               ;;          current-level-inner relative-level)
                ;; (message "[ox-hugo build-toc DBG] level:%d, number:%s" level number)
+               ;; (message "[ox-hugo build-toc DBG] indentation: %S" indentation)
                ;; (message "[ox-hugo build-toc DBG] todo: %s | %s" todo todo-str)
                (concat indentation "- " number toc-entry tags)))
            (org-export-collect-headlines info n (and local keyword))
@@ -1080,9 +1092,13 @@ contents according to the current headline."
                         "    list-style: none;\n"
                         "  }\n"
                         "</style>\n"))
-              "<div class=\"ox-hugo-toc toc\">\n" ;This is a nasty workaround
-              "<div></div>\n"        ;till Hugo/Blackfriday support
-              toc-headline           ;wrapping Markdown in HTML div's.
+              (format "<div class=\"ox-hugo-toc toc%s\">\n"
+                      (if local
+                          (format " local level-%d" current-level)
+                        ""))
+              "<div></div>\n" ;This is a nasty workaround till Hugo/Blackfriday support
+              toc-headline    ;wrapping Markdown in HTML div's.
+              "\n"
               toc-items ;https://github.com/kaushalmodi/ox-hugo/issues/93
               "\n\n"
               "</div>\n"

test/site/content-org/all-posts.org

@@ -4620,6 +4620,36 @@ This post should also be created in =content/section-a/=.
 :END:
 #+toc: headlines 6
 #+include: "./all-posts.org::#nested-sections-example" :only-contents t
+*** TOC Local                                                         :local:
+:PROPERTIES:
+:EXPORT_FILE_NAME: toc-local
+:END:
+Below, TOC is exported with only level-1 headings in this post.
+#+toc: headlines 1
+**** Post sub-heading 1
+Below, TOC is exported with only level-1 headings *relative to* this
+"Post sub-heading 1" section.
+#+toc: headlines 1 local
+***** Post sub-heading 1.1
+****** Post sub-heading 1.1.1
+***** Post sub-heading 1.2
+***** Post sub-heading 1.3
+**** Post sub-heading 2
+***** Post sub-heading 2.1
+***** Post sub-heading 2.2
+Below, TOC is exported with only up to level-2 headings *relative to*
+this "Post sub-heading 2.2" section.
+#+toc: headlines 2 local
+****** Post sub-heading 2.2.1
+****** Post sub-heading 2.2.2
+****** Post sub-heading 2.2.3
+Below, TOC is exported with only level-1 headings *relative to* this
+"Post sub-heading 2.2.3" section.
+#+toc: headlines 1 local
+******* Post sub-heading 2.2.3.1
+******* Post sub-heading 2.2.3.2
+**** Post sub-heading 3
+***** Post sub-heading 3.1
 * Pandoc Citations                                         :pandoc:citations:
 :PROPERTIES:
 :EXPORT_HUGO_PANDOC_CITATIONS: t

test/site/content/posts/toc-local.md

@@ -0,0 +1,104 @@
++++
+title = "TOC Local"
+tags = ["keyword", "toc", "local"]
+draft = false
++++
+
+Below, TOC is exported with only level-1 headings in this post.
+
+<div class="ox-hugo-toc toc">
+<div></div>
+
+<div class="heading">Table of Contents</div>
+
+- [Post sub-heading 1](#post-sub-heading-1)
+- [Post sub-heading 2](#post-sub-heading-2)
+- [Post sub-heading 3](#post-sub-heading-3)
+
+</div>
+<!--endtoc-->
+
+
+## Post sub-heading 1 {#post-sub-heading-1}
+
+Below, TOC is exported with only level-1 headings **relative to** this
+"Post sub-heading 1" section.
+
+<div class="ox-hugo-toc toc local level-2">
+<div></div>
+
+- [Post sub-heading 1.1](#post-sub-heading-1-dot-1)
+- [Post sub-heading 1.2](#post-sub-heading-1-dot-2)
+- [Post sub-heading 1.3](#post-sub-heading-1-dot-3)
+
+</div>
+<!--endtoc-->
+
+
+### Post sub-heading 1.1 {#post-sub-heading-1-dot-1}
+
+
+#### Post sub-heading 1.1.1 {#post-sub-heading-1-dot-1-dot-1}
+
+
+### Post sub-heading 1.2 {#post-sub-heading-1-dot-2}
+
+
+### Post sub-heading 1.3 {#post-sub-heading-1-dot-3}
+
+
+## Post sub-heading 2 {#post-sub-heading-2}
+
+
+### Post sub-heading 2.1 {#post-sub-heading-2-dot-1}
+
+
+### Post sub-heading 2.2 {#post-sub-heading-2-dot-2}
+
+Below, TOC is exported with only up to level-2 headings **relative to**
+this "Post sub-heading 2.2" section.
+
+<div class="ox-hugo-toc toc local level-3">
+<div></div>
+
+- [Post sub-heading 2.2.1](#post-sub-heading-2-dot-2-dot-1)
+- [Post sub-heading 2.2.2](#post-sub-heading-2-dot-2-dot-2)
+- [Post sub-heading 2.2.3](#post-sub-heading-2-dot-2-dot-3)
+    - [Post sub-heading 2.2.3.1](#post-sub-heading-2-dot-2-dot-3-dot-1)
+    - [Post sub-heading 2.2.3.2](#post-sub-heading-2-dot-2-dot-3-dot-2)
+
+</div>
+<!--endtoc-->
+
+
+#### Post sub-heading 2.2.1 {#post-sub-heading-2-dot-2-dot-1}
+
+
+#### Post sub-heading 2.2.2 {#post-sub-heading-2-dot-2-dot-2}
+
+
+#### Post sub-heading 2.2.3 {#post-sub-heading-2-dot-2-dot-3}
+
+Below, TOC is exported with only level-1 headings **relative to** this
+"Post sub-heading 2.2.3" section.
+
+<div class="ox-hugo-toc toc local level-4">
+<div></div>
+
+- [Post sub-heading 2.2.3.1](#post-sub-heading-2-dot-2-dot-3-dot-1)
+- [Post sub-heading 2.2.3.2](#post-sub-heading-2-dot-2-dot-3-dot-2)
+
+</div>
+<!--endtoc-->
+
+
+##### Post sub-heading 2.2.3.1 {#post-sub-heading-2-dot-2-dot-3-dot-1}
+
+
+##### Post sub-heading 2.2.3.2 {#post-sub-heading-2-dot-2-dot-3-dot-2}
+
+
+## Post sub-heading 3 {#post-sub-heading-3}
+
+
+### Post sub-heading 3.1 {#post-sub-heading-3-dot-1}