[ShortCode] 3/x add html support

Author: eklipse2k8

Cargo.lock

@@ -32,6 +32,7 @@ pest = "2"
 pest_derive = "2"
 shell-words = { version = "1.0", optional = true }
 emojis = { version = "0.5.2", optional = true }
+unicode_reader = { version = "1.0.2", optional = true }
 
 [dev-dependencies]
 timebomb = "0.1.2"
@@ -42,7 +43,7 @@ propfuzz = "0.0.1"
 [features]
 default = ["cli", "syntect"]
 cli = ["clap", "shell-words", "xdg"]
-shortcodes = ["emojis"]
+shortcodes = ["emojis", "unicode_reader"]
 
 [target.'cfg(all(not(windows), not(target_arch="wasm32")))'.dependencies]
 xdg = { version = "^2.1", optional = true }

Cargo.toml

@@ -24,8 +24,11 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 extern crate emojis;
+extern crate unicode_reader;
 
-use std::str;
+use std::{io::Cursor, str};
+
+//use unicode_reader::{CodePoints, Graphemes};
 
 /// The details of an inline emoji
 #[derive(Debug, Clone)]
@@ -40,13 +43,38 @@ impl NodeShortCode {
         code.emoji().is_some()
     }
 
+    /// Returns the referenced shortcode
     pub fn shortcode(&self) -> Option<String> {
         self.shortcode.clone()
     }
 
+    /// Returns native utf8 character of the emoji referenced from the shortcode
     pub fn emoji(&self) -> Option<&'static str> {
         Some(emojis::get_by_shortcode(self.shortcode()?.as_str())?.as_str())
     }
+
+    /// Outputs an HTML entity instead of the native emoji utf8 glyph
+    pub fn as_entity(&self) -> Option<String> {
+        match self.emoji() {
+            Some(emoji) => {
+                let codepoints = unicode_reader::CodePoints::from(Cursor::new(emoji));
+                let entities = codepoints
+                    .map(|r| {
+                        format!(
+                            "&#{};",
+                            match r.ok() {
+                                Some(c) => c,
+                                None => char::from_u32(0).unwrap(),
+                            }
+                        )
+                    })
+                    .collect::<Vec<String>>()
+                    .join("");
+                Some(entities)
+            }
+            None => None,
+        }
+    }
 }
 
 impl<'a> From<Vec<u8>> for NodeShortCode {