Add linenumbering

Fix rocket dependencies

Cargo.toml

@@ -10,7 +10,7 @@ edition = "2018"
 [dependencies]
 owning_ref = "0.4"
 linked-hash-map = "0.5"
-rocket = { version = "0.4", default-features = false }
+rocket = { version = "0.4.4", default-features = false }
 askama = "0.8"
 lazy_static = "1.2"
 rand = { version = "0.6", features = ["nightly"] }

src/main.rs

@@ -1,5 +1,4 @@
 #![feature(proc_macro_hygiene, decl_macro)]
-#![feature(type_alias_enum_variants)]
 
 #[macro_use]
 extern crate lazy_static;
@@ -19,7 +18,7 @@ use params::{HostHeader, IsPlaintextRequest};
 
 use askama::{Html as AskamaHtml, MarkupDisplay, Template};
 
-use rocket::http::{ContentType, Status};
+use rocket::http::{ContentType, RawStr, Status};
 use rocket::request::Form;
 use rocket::response::content::{Content, Html};
 use rocket::response::Redirect;
@@ -100,14 +99,22 @@ fn show_paste(key: String, plaintext: IsPlaintextRequest) -> Result<Content<Stri
     if *plaintext {
         Ok(Content(ContentType::Plain, entry.to_string()))
     } else {
-        let content = match ext {
+        let code_highlighted = match ext {
             Some(extension) => match highlight(&entry, extension) {
-                Some(html) => MarkupDisplay::new_safe(Cow::Owned(html), AskamaHtml),
+                Some(html) => html,
                 None => return Err(Status::NotFound),
             },
-            None => MarkupDisplay::new_unsafe(Cow::Borrowed(entry), AskamaHtml),
+            None => String::from(RawStr::from_str(entry).html_escape()),
         };
 
+        // Add <code> tags to enable line numbering with CSS 
+        let html = format!(
+            "<code>{}</code>",
+            code_highlighted.replace("\n", "</code><code>")
+        );
+
+        let content = MarkupDisplay::new_safe(Cow::Borrowed(&html), AskamaHtml);
+
         let template = ShowPaste { content };
         match template.render() {
             Ok(html) => Ok(Content(ContentType::HTML, html)),

templates/paste.html

@@ -9,7 +9,23 @@
         font-family: inherit;
         font-size: 1rem;
         line-height: inherit;
+        counter-reset: line;        
     }
+    code {
+        counter-increment: line;
+    }
+      
+    code::before {
+        content: counter(line);
+        display: inline-block;
+        width: 2em; /* Fixed width */
+        padding: 0 1em 0.3em 0;
+        margin-right: .5em;
+        color: #888;
+        -webkit-user-select: none;
+    }
+
+
 {% endblock styles %}
 
-{% block content %}<pre><code>{{ content|safe }}</code></pre>{% endblock content %}
+{% block content %}<pre>{{ content|safe }}</pre>{% endblock content %}