From 04da527e536fbe6095c9bca816604a58e20b25d4 Mon Sep 17 00:00:00 2001
From: Vincent Prouillet <vincent@wearewizards.io>
Date: Thu, 6 Apr 2017 17:07:53 +0900
Subject: [PATCH] Render anchor link

---
 src/config.rs                         | 6 ++++++
 src/markdown.rs                       | 9 ++++++++-
 src/site.rs                           | 1 +
 src/templates/anchor-link.html        | 3 +++
 test_site/content/posts/fixed-slug.md | 2 ++
 5 files changed, 20 insertions(+), 1 deletion(-)
 create mode 100644 src/templates/anchor-link.html

diff --git a/src/config.rs b/src/config.rs
index 0f9a737d..2d8a3bfd 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -30,6 +30,10 @@ pub struct Config {
     pub generate_tags_pages: Option<bool>,
     /// Whether to generate categories and individual tag categories if some pages have them. Defaults to true
     pub generate_categories_pages: Option<bool>,
+    /// Whether to insert a link for each header like in Github READMEs. Defaults to false
+    /// The default template can be overridden by creating a `anchor-link.html` template and CSS will need to be
+    /// written if you turn that on.
+    pub insert_anchor_links: Option<bool>,
 
     /// All user params set in [extra] in the config
     pub extra: Option<HashMap<String, Toml>>,
@@ -67,6 +71,7 @@ impl Config {
         set_default!(config.generate_rss, false);
         set_default!(config.generate_tags_pages, true);
         set_default!(config.generate_categories_pages, true);
+        set_default!(config.insert_anchor_links, false);
 
         Ok(config)
     }
@@ -104,6 +109,7 @@ impl Default for Config {
             generate_rss: Some(false),
             generate_tags_pages: Some(true),
             generate_categories_pages: Some(true),
+            insert_anchor_links: Some(false),
             extra: None,
         }
     }
diff --git a/src/markdown.rs b/src/markdown.rs
index 736d8245..f4321794 100644
--- a/src/markdown.rs
+++ b/src/markdown.rs
@@ -201,7 +201,14 @@ pub fn markdown_to_html(content: &str, permalinks: &HashMap<String, String>, ter
                 if in_header {
                     let id = find_anchor(&anchors, slugify(&text), 0);
                     anchors.push(id.clone());
-                    return Event::Html(Owned(format!(r#"id="{}">{}"#, id, text)));
+                    let anchor_link = if config.insert_anchor_links.unwrap() {
+                        let mut context = Context::new();
+                        context.add("id", &id);
+                        tera.render("anchor-link.html", &context).unwrap()
+                    } else {
+                        String::new()
+                    };
+                    return Event::Html(Owned(format!(r#"id="{}">{}{}"#, id, anchor_link, text)));
                 }
 
                 // Business as usual
diff --git a/src/site.rs b/src/site.rs
index 59463718..50602128 100644
--- a/src/site.rs
+++ b/src/site.rs
@@ -23,6 +23,7 @@ lazy_static! {
             ("rss.xml", include_str!("templates/rss.xml")),
             ("sitemap.xml", include_str!("templates/sitemap.xml")),
             ("robots.txt", include_str!("templates/robots.txt")),
+            ("anchor-link.html", include_str!("templates/anchor-link.html")),
 
             ("shortcodes/youtube.html", include_str!("templates/shortcodes/youtube.html")),
             ("shortcodes/vimeo.html", include_str!("templates/shortcodes/vimeo.html")),
diff --git a/src/templates/anchor-link.html b/src/templates/anchor-link.html
new file mode 100644
index 00000000..e6f480b8
--- /dev/null
+++ b/src/templates/anchor-link.html
@@ -0,0 +1,3 @@
+<a class="anchor" href="#{{ id }}" aria-label="Anchor link for: {{ id }}">
+    🔗
+</a>
diff --git a/test_site/content/posts/fixed-slug.md b/test_site/content/posts/fixed-slug.md
index 3f1216ff..57f322f5 100644
--- a/test_site/content/posts/fixed-slug.md
+++ b/test_site/content/posts/fixed-slug.md
@@ -6,3 +6,5 @@ date = "2017-01-01"
 +++
 
 A simple page with a slug defined
+
+# Title