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113 lines
3.1 KiB
113 lines
3.1 KiB
# frozen_string_literal: true |
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class EmojiFormatter |
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include RoutingHelper |
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DISALLOWED_BOUNDING_REGEX = /[[:alnum:]:]/ |
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attr_reader :html, :custom_emojis, :options |
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# @param [ActiveSupport::SafeBuffer] html |
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# @param [Array<CustomEmoji>] custom_emojis |
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# @param [Hash] options |
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# @option options [Boolean] :animate |
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# @option options [String] :style |
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# @option options [String] :raw_shortcode |
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def initialize(html, custom_emojis, options = {}) |
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raise ArgumentError unless html.html_safe? |
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@html = html |
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@custom_emojis = custom_emojis |
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@options = options |
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end |
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def to_s |
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return html if custom_emojis.empty? || html.blank? |
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tree = Nokogiri::HTML.fragment(html) |
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tree.xpath('./text()|.//text()[not(ancestor[@class="invisible"])]').to_a.each do |node| |
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i = -1 |
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inside_shortname = false |
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shortname_start_index = -1 |
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last_index = 0 |
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text = node.content |
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result = Nokogiri::XML::NodeSet.new(tree.document) |
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while i + 1 < text.size |
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i += 1 |
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if inside_shortname && text[i] == ':' |
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inside_shortname = false |
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shortcode = text[shortname_start_index + 1..i - 1] |
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char_after = text[i + 1] |
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next unless (char_after.nil? || !DISALLOWED_BOUNDING_REGEX.match?(char_after)) && (emoji = emoji_map[shortcode]) |
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result << Nokogiri::XML::Text.new(text[last_index..shortname_start_index - 1], tree.document) if shortname_start_index.positive? |
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result << Nokogiri::HTML.fragment(tag_for_emoji(shortcode, emoji)) |
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last_index = i + 1 |
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elsif text[i] == ':' && (i.zero? || !DISALLOWED_BOUNDING_REGEX.match?(text[i - 1])) |
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inside_shortname = true |
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shortname_start_index = i |
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end |
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end |
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result << Nokogiri::XML::Text.new(text[last_index..], tree.document) |
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node.replace(result) |
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end |
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tree.to_html.html_safe # rubocop:disable Rails/OutputSafety |
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end |
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private |
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def emoji_map |
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@emoji_map ||= custom_emojis.each_with_object({}) { |e, h| h[e.shortcode] = [full_asset_url(e.image.url), full_asset_url(e.image.url(:static))] } |
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end |
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def count_tag_nesting(tag) |
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if tag[1] == '/' |
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-1 |
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elsif tag[-2] == '/' |
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0 |
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else |
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1 |
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end |
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end |
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def tag_for_emoji(shortcode, emoji) |
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return content_tag(:span, ":#{shortcode}:", translate: 'no') if raw_shortcode? |
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original_url, static_url = emoji |
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image_tag( |
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animate? ? original_url : static_url, |
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image_attributes.merge(alt: ":#{shortcode}:", title: ":#{shortcode}:", data: image_data_attributes(original_url, static_url)) |
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) |
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end |
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def image_attributes |
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{ rel: 'emoji', draggable: false, width: 16, height: 16, class: image_class_names, style: image_style } |
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end |
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def image_data_attributes(original_url, static_url) |
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{ original: original_url, static: static_url } unless animate? |
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end |
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def image_class_names |
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animate? ? 'emojione' : 'emojione custom-emoji' |
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end |
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def image_style |
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@options[:style] |
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end |
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def animate? |
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@options[:animate] || @options.key?(:style) |
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end |
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def raw_shortcode? |
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@options[:raw_shortcode] |
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end |
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end
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