Use native unicode emojis

 - gl_emoji for falling back to image/css-sprite when the browser
   doesn't support an emoji
 - Markdown rendering (Banzai filter)
 - Autocomplete
 - Award emoji menu
    - Perceived perf
    - Immediate response because we now build client-side
 - Update `digests.json` generation in gemojione rake task to be more
   useful and  include `unicodeVersion`

MR: !9437

See issues

 - #26371
 - #27250
 - #22474

1 files changed, 11 insertions, 53 deletions

diff --git a/lib/banzai/filter/emoji_filter.rb b/lib/banzai/filter/emoji_filter.rb
index a8c1ca0c60a..d6138816e70 100644
--- a/lib/banzai/filter/emoji_filter.rb
+++ b/lib/banzai/filter/emoji_filter.rb
@@ -17,8 +17,8 @@ module Banzai
 
           next unless content.include?(':') || node.text.match(emoji_unicode_pattern)
 
-          html = emoji_name_image_filter(content)
-          html = emoji_unicode_image_filter(html)
+          html = emoji_unicode_element_unicode_filter(content)
+          html = emoji_name_element_unicode_filter(html)
 
           next if html == content
 
@@ -27,33 +27,30 @@ module Banzai
         doc
       end
 
-      # Replace :emoji: with corresponding images.
+      # Replace :emoji: with corresponding gl-emoji unicode.
       #
       # text - String text to replace :emoji: in.
       #
-      # Returns a String with :emoji: replaced with images.
-      def emoji_name_image_filter(text)
+      # Returns a String with :emoji: replaced with gl-emoji unicode.
+      def emoji_name_element_unicode_filter(text)
         text.gsub(emoji_pattern) do |match|
           name = $1
-          emoji_image_tag(name, emoji_url(name))
+          Gitlab::Emoji.gl_emoji_tag(name)
         end
       end
 
-      # Replace unicode emoji with corresponding images if they exist.
+      # Replace unicode emoji with corresponding gl-emoji unicode.
       #
       # text - String text to replace unicode emoji in.
       #
-      # Returns a String with unicode emoji replaced with images.
-      def emoji_unicode_image_filter(text)
+      # Returns a String with unicode emoji replaced with gl-emoji unicode.
+      def emoji_unicode_element_unicode_filter(text)
         text.gsub(emoji_unicode_pattern) do |moji|
-          emoji_image_tag(Gitlab::Emoji.emojis_by_moji[moji]['name'], emoji_unicode_url(moji))
+          emoji_info = Gitlab::Emoji.emojis_by_moji[moji]
+          Gitlab::Emoji.gl_emoji_tag(emoji_info['name'])
         end
       end
 
-      def emoji_image_tag(emoji_name, emoji_url)
-        "<img class='emoji' title=':#{emoji_name}:' alt=':#{emoji_name}:' src='#{emoji_url}' height='20' width='20' align='absmiddle' />"
-      end
-
       # Build a regexp that matches all valid :emoji: names.
       def self.emoji_pattern
         @emoji_pattern ||= /:(#{Gitlab::Emoji.emojis_names.map { |name| Regexp.escape(name) }.join('|')}):/
@@ -66,52 +63,13 @@ module Banzai
 
       private
 
-      def emoji_url(name)
-        emoji_path = emoji_filename(name)
-
-        if context[:asset_host]
-          # Asset host is specified.
-          url_to_image(emoji_path)
-        elsif context[:asset_root]
-          # Gitlab url is specified
-          File.join(context[:asset_root], url_to_image(emoji_path))
-        else
-          # All other cases
-          url_to_image(emoji_path)
-        end
-      end
-
-      def emoji_unicode_url(moji)
-        emoji_unicode_path = emoji_unicode_filename(moji)
-
-        if context[:asset_host]
-          url_to_image(emoji_unicode_path)
-        elsif context[:asset_root]
-          File.join(context[:asset_root], url_to_image(emoji_unicode_path))
-        else
-          url_to_image(emoji_unicode_path)
-        end
-      end
-
-      def url_to_image(image)
-        ActionController::Base.helpers.url_to_image(image)
-      end
-
       def emoji_pattern
         self.class.emoji_pattern
       end
 
-      def emoji_filename(name)
-        "#{Gitlab::Emoji.emoji_filename(name)}.png"
-      end
-
       def emoji_unicode_pattern
         self.class.emoji_unicode_pattern
       end
-
-      def emoji_unicode_filename(name)
-        "#{Gitlab::Emoji.emoji_unicode_filename(name)}.png"
-      end
     end
   end
 end