discourse/spec/lib
David Taylor d0243f741e
UX: Use dominant color as image loading placeholder (#18248)
We previously had a system which would generate a 10x10px preview of images and add their URLs in a data-small-upload attribute. The client would then use that as the background-image of the `<img>` element. This works reasonably well on fast connections, but on slower connections it can take a few seconds for the placeholders to appear. The act of loading the placeholders can also break or delay the loading of the 'real' images.

This commit replaces the placeholder logic with a new approach. Instead of a 10x10px preview, we use imagemagick to calculate the average color of an image and store it in the database. The hex color value then added as a `data-dominant-color` attribute on the `<img>` element, and the client can use this as a `background-color` on the element while the real image is loading. That means no extra HTTP request is required, and so the placeholder color can appear instantly.

Dominant color will be calculated:
1. When a new upload is created
2. During a post rebake, if the dominant color is missing from an upload, it will be calculated and stored
3. Every 15 minutes, 25 old upload records are fetched and their dominant color calculated and stored. (part of the existing PeriodicalUpdates job)

Existing posts will continue to use the old 10x10px placeholder system until they are next rebaked
2022-09-20 10:28:17 +01:00
..
auth DEV: Use proper wording for contexts in specs 2022-08-04 11:05:02 +02:00
backup_restore FIX: Backup/Restore didn't use correct Redis namespace in multisite (#18060) 2022-08-24 01:43:42 +02:00
common_passwords DEV: Use proper wording for contexts in specs 2022-08-04 11:05:02 +02:00
compression DEV: Use proper wording for contexts in specs 2022-08-04 11:05:02 +02:00
concern DEV: Use proper wording for contexts in specs 2022-08-04 11:05:02 +02:00
content_security_policy Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
email FIX: Limit new and existent staged users for email topics (#17970) 2022-08-18 18:19:20 +03:00
file_store DEV: Use proper wording for contexts in specs 2022-08-04 11:05:02 +02:00
freedom_patches DEV: Use proper wording for contexts in specs 2022-08-04 11:05:02 +02:00
guardian DEV: Use proper wording for contexts in specs 2022-08-04 11:05:02 +02:00
highlight_js Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
i18n Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
imap DEV: Use proper wording for contexts in specs 2022-08-04 11:05:02 +02:00
import Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
middleware DEV: Use proper wording for contexts in specs 2022-08-04 11:05:02 +02:00
migration Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
onebox DEV: Fix spec file name (#18227) 2022-09-12 14:03:23 +02:00
plugin DEV: Use proper wording for contexts in specs 2022-08-04 11:05:02 +02:00
pretty_text DEV: Use proper wording for contexts in specs 2022-08-04 11:05:02 +02:00
rate_limiter DEV: Automatically require 'rails_helper' in all specs (#16077) 2022-03-01 17:50:50 +00:00
scheduler Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
second_factor DEV: Use proper wording for contexts in specs 2022-08-04 11:05:02 +02:00
seed_data FIX: Only seed general category on new sites (#18130) 2022-08-29 18:23:14 -06:00
site_settings DEV: Use proper wording for contexts in specs 2022-08-04 11:05:02 +02:00
stylesheet DEV: Use proper wording for contexts in specs 2022-08-04 11:05:02 +02:00
svg_sprite DEV: Use proper wording for contexts in specs 2022-08-04 11:05:02 +02:00
theme_store Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
topic_query DEV: Use proper wording for contexts in specs 2022-08-04 11:05:02 +02:00
validators DEV: Make the first argument to the top-level describe a constant in specs 2022-08-08 18:07:49 +02:00
webauthn Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
wizard FIX: reload styling changes for wizard styling step (#18121) 2022-08-29 15:10:47 +05:30
admin_confirmation_spec.rb Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
admin_user_index_query_spec.rb DEV: Use proper wording for contexts in specs 2022-08-04 11:05:02 +02:00
archetype_spec.rb DEV: Use proper wording for contexts in specs 2022-08-04 11:05:02 +02:00
bookmark_manager_spec.rb FIX: Do not save default auto_delete_preference for bookmark (#18119) 2022-08-30 09:21:41 +10:00
bookmark_query_spec.rb FEATURE: whispers available for groups (#17170) 2022-06-30 10:18:12 +10:00
bookmark_reminder_notification_handler_spec.rb FEATURE: Promote polymorphic bookmarks to default and migrate (#16729) 2022-05-23 10:07:15 +10:00
browser_detection_spec.rb Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
cache_spec.rb Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
category_badge_spec.rb Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
composer_messages_finder_spec.rb DEV: Use proper wording for contexts in specs 2022-08-04 11:05:02 +02:00
content_buffer_spec.rb Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
content_security_policy_spec.rb Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
cooked_post_processor_spec.rb UX: Use dominant color as image loading placeholder (#18248) 2022-09-20 10:28:17 +01:00
crawler_detection_spec.rb DEV: Use proper wording for contexts in specs 2022-08-04 11:05:02 +02:00
current_user_spec.rb Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
db_helper_spec.rb DEV: Automatically require 'rails_helper' in all specs (#16077) 2022-03-01 17:50:50 +00:00
directory_helper_spec.rb Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
discourse_diff_spec.rb Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
discourse_event_spec.rb Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
discourse_hub_spec.rb Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
discourse_js_processor_spec.rb DEV: Use DiscourseJsProcessor for theme template compilation (#18135) 2022-09-01 11:50:46 +01:00
discourse_plugin_registry_spec.rb DEV: Use proper wording for contexts in specs 2022-08-04 11:05:02 +02:00
discourse_redis_spec.rb Revert "DEV: Upgrade Redis to 4.8" (#18099) 2022-08-26 15:16:50 +10:00
discourse_sourcemapping_url_processor_spec.rb Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
discourse_spec.rb DEV: Use proper wording for contexts in specs 2022-08-04 11:05:02 +02:00
discourse_tagging_spec.rb DEV: Use proper wording for contexts in specs 2022-08-04 11:05:02 +02:00
discourse_updates_spec.rb DEV: Use proper wording for contexts in specs 2022-08-04 11:05:02 +02:00
distributed_cache_spec.rb DEV: Make the first argument to the top-level describe a constant in specs 2022-08-08 18:07:49 +02:00
distributed_memoizer_spec.rb Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
distributed_mutex_spec.rb DEV: Use proper wording for contexts in specs 2022-08-04 11:05:02 +02:00
email_cook_spec.rb Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
email_updater_spec.rb DEV: Use proper wording for contexts in specs 2022-08-04 11:05:02 +02:00
ember_cli_spec.rb DEV: Add test for EmberCli#ember_version (#18140) 2022-08-30 20:33:08 +01:00
encodings_spec.rb DEV: Use proper wording for contexts in specs 2022-08-04 11:05:02 +02:00
enum_spec.rb DEV: Use proper wording for contexts in specs 2022-08-04 11:05:02 +02:00
excerpt_parser_spec.rb Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
feed_element_installer_spec.rb Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
feed_item_accessor_spec.rb Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
file_helper_spec.rb Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
filter_best_posts_spec.rb Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
final_destination_spec.rb FIX: Swallow SSL errors when generating oneboxes 2022-08-09 16:54:45 +02:00
flag_settings_spec.rb DEV: Automatically require 'rails_helper' in all specs (#16077) 2022-03-01 17:50:50 +00:00
gaps_spec.rb DEV: Use proper wording for contexts in specs 2022-08-04 11:05:02 +02:00
global_path_spec.rb DEV: Use proper wording for contexts in specs 2022-08-04 11:05:02 +02:00
group_email_credentials_check_spec.rb Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
guardian_spec.rb FIX: Improvements to like button for archived topics (#17951) 2022-08-22 14:58:02 +03:00
has_errors_spec.rb DEV: Use proper wording for contexts in specs 2022-08-04 11:05:02 +02:00
hijack_spec.rb DEV: Use proper wording for contexts in specs 2022-08-04 11:05:02 +02:00
html_prettify_spec.rb Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
html_to_markdown_spec.rb Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
image_sizer_spec.rb Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
inline_oneboxer_spec.rb DEV: Use proper wording for contexts in specs 2022-08-04 11:05:02 +02:00
js_locale_helper_spec.rb DEV: Use proper wording for contexts in specs 2022-08-04 11:05:02 +02:00
json_error_spec.rb Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
letter_avatar_spec.rb Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
message_id_service_spec.rb Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
method_profiler_spec.rb Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
mini_sql_multisite_connection_spec.rb Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
mobile_detection_spec.rb Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
new_post_manager_spec.rb DEV: Use proper wording for contexts in specs 2022-08-04 11:05:02 +02:00
new_post_result_spec.rb Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
onebox_spec.rb Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
oneboxer_spec.rb DEV: Fix busted twitter onebox spec (#18009) 2022-08-20 11:19:19 +02:00
onpdiff_spec.rb Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
pbkdf2_spec.rb Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
pinned_check_spec.rb Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
plain_text_to_markdown_spec.rb DEV: Use proper wording for contexts in specs 2022-08-04 11:05:02 +02:00
post_action_creator_spec.rb DEV: Use proper wording for contexts in specs 2022-08-04 11:05:02 +02:00
post_action_destroyer_spec.rb DEV: Use proper wording for contexts in specs 2022-08-04 11:05:02 +02:00
post_creator_spec.rb FIX: Skip topic allowed user for small actions (#18075) 2022-08-29 13:01:16 +03:00
post_destroyer_spec.rb DEV: Use proper wording for contexts in specs 2022-08-04 11:05:02 +02:00
post_jobs_enqueuer_spec.rb DEV: Automatically require 'rails_helper' in all specs (#16077) 2022-03-01 17:50:50 +00:00
post_locker_spec.rb Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
post_merger_spec.rb Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
post_revisor_spec.rb FIX: hide welcome topic banner as soon as the welcome topic is edited (#18125) 2022-09-01 09:44:21 +05:30
presence_channel_spec.rb Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
pretty_text_spec.rb FIX: Empty inline BBCodes were broken (#18276) 2022-09-20 09:50:22 +10:00
promotion_spec.rb DEV: Use proper wording for contexts in specs 2022-08-04 11:05:02 +02:00
quote_comparer_spec.rb Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
rate_limiter_spec.rb DEV: Use proper wording for contexts in specs 2022-08-04 11:05:02 +02:00
retrieve_title_spec.rb FIX: ignore malformed HTML for title extraction (#18040) 2022-08-23 15:03:57 +10:00
rtl_spec.rb DEV: Use proper wording for contexts in specs 2022-08-04 11:05:02 +02:00
s3_cors_rulesets_spec.rb DEV: Automatically require 'rails_helper' in all specs (#16077) 2022-03-01 17:50:50 +00:00
s3_helper_spec.rb Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
s3_inventory_multisite_spec.rb Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
s3_inventory_spec.rb DEV: Use proper wording for contexts in specs 2022-08-04 11:05:02 +02:00
score_calculator_spec.rb DEV: Use proper wording for contexts in specs 2022-08-04 11:05:02 +02:00
scss_checker_spec.rb Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
search_spec.rb DEV: Fix a flaky spec (#18146) 2022-08-31 20:52:57 +02:00
secure_session_spec.rb Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
shrink_uploaded_image_spec.rb Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
site_icon_manager_spec.rb Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
site_setting_extension_multisite_spec.rb Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
site_setting_extension_spec.rb DEV: Use proper wording for contexts in specs 2022-08-04 11:05:02 +02:00
slug_spec.rb DEV: Use proper wording for contexts in specs 2022-08-04 11:05:02 +02:00
spam_handler_spec.rb Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
suggested_topics_builder_spec.rb DEV: Use proper wording for contexts in specs 2022-08-04 11:05:02 +02:00
system_message_spec.rb Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
text_cleaner_spec.rb DEV: Use proper wording for contexts in specs 2022-08-04 11:05:02 +02:00
text_sentinel_spec.rb DEV: Use proper wording for contexts in specs 2022-08-04 11:05:02 +02:00
theme_flag_modifier_spec.rb Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
theme_javascript_compiler_spec.rb DEV: Use DiscourseJsProcessor for theme template compilation (#18135) 2022-09-01 11:50:46 +01:00
theme_settings_manager_spec.rb DEV: Use proper wording for contexts in specs 2022-08-04 11:05:02 +02:00
theme_settings_parser_spec.rb DEV: Use proper wording for contexts in specs 2022-08-04 11:05:02 +02:00
timeline_lookup_spec.rb Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
tiny_japanese_segmenter_spec.rb Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
topic_creator_spec.rb DEV: Use proper wording for contexts in specs 2022-08-04 11:05:02 +02:00
topic_publisher_spec.rb DEV: Use proper wording for contexts in specs 2022-08-04 11:05:02 +02:00
topic_query_spec.rb FIX: Avoid duplicate topic-list requests (#18073) 2022-08-24 11:54:01 +01:00
topic_retriever_spec.rb Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
topic_upload_security_manager_spec.rb Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
topic_view_spec.rb DEV: Use proper wording for contexts in specs 2022-08-04 11:05:02 +02:00
topics_bulk_action_spec.rb Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
trashable_spec.rb Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
trust_level_spec.rb DEV: Use proper wording for contexts in specs 2022-08-04 11:05:02 +02:00
twitter_api_spec.rb Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
unread_spec.rb Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
upload_creator_spec.rb DEV: Use proper wording for contexts in specs 2022-08-04 11:05:02 +02:00
upload_markdown_spec.rb Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
upload_recovery_spec.rb DEV: Use proper wording for contexts in specs 2022-08-04 11:05:02 +02:00
upload_security_spec.rb DEV: Automatically require 'rails_helper' in all specs (#16077) 2022-03-01 17:50:50 +00:00
url_helper_spec.rb DEV: Rename UriHelper.escape_uri to .normalized_encode 2022-08-09 11:55:25 +01:00
user_comm_screener_spec.rb FIX: Handle actor not having preferences in UserCommScreener (#17790) 2022-08-04 10:16:54 +10:00
user_lookup_spec.rb Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
user_name_suggester_spec.rb Add RSpec 4 compatibility (#17652) 2022-07-28 10:27:38 +08:00
version_spec.rb DEV: Use proper wording for contexts in specs 2022-08-04 11:05:02 +02:00