Module: LazyImageTagHelper

Includes:
PreferencesHelper
Defined in:
app/helpers/lazy_image_tag_helper.rb

Class Method Summary collapse

Instance Method Summary collapse

Methods included from PreferencesHelper

#custom_diff_color_classes, #dashboard_choices, #default_preferred_language_choices, #first_day_of_week_choices, #first_day_of_week_choices_with_default, #integration_views, #language_choices, #layout_choices, #localized_dashboard_choices, #project_view_choices, #user_application_dark_mode?, #user_application_theme, #user_application_theme_css_filename, #user_color_scheme, #user_diffs_colors, #user_tab_width, #user_theme_primary_color

Class Method Details

.placeholder_image ⇒ Object 



6
7
8
 
# File 'app/helpers/lazy_image_tag_helper.rb', line 6

def placeholder_image
  "data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="
end

Instance Method Details

#image_tag(source, options = {}) ⇒ Object

Override the default ActionView ‘image_tag` helper to support lazy-loading accept :auto_dark boolean to enable automatic dark variant of the image (see: gitlab.com/gitlab-org/gitlab-ui/-/merge_requests/2698) accept :dark_variant path to be used as a source when dark mode is enabled



14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
 
# File 'app/helpers/lazy_image_tag_helper.rb', line 14

def image_tag(source, options = {})
  source, options = prepare_dark_variant(source, options)
  options = options.symbolize_keys

  unless options.delete(:lazy) == false
    options[:data] ||= {}
    options[:data][:src] = path_to_image(source)

    # options[:class] can be either String or Array.
    klass_opts = Array.wrap(options[:class])
    klass_opts << "lazy"

    options[:class] = klass_opts.join(' ')
    source = placeholder_image
  end

  super(source, options)
end