This commit fleshes out and adds functionality for the new `#hashtag` search and
lookup system, still hidden behind the `enable_experimental_hashtag_autocomplete`
feature flag.
**Serverside**
We have two plugin API registration methods that are used to define data sources
(`register_hashtag_data_source`) and hashtag result type priorities depending on
the context (`register_hashtag_type_in_context`). Reading the comments in plugin.rb
should make it clear what these are doing. Reading the `HashtagAutocompleteService`
in full will likely help a lot as well.
Each data source is responsible for providing its own **lookup** and **search**
method that returns hashtag results based on the arguments provided. For example,
the category hashtag data source has to take into account parent categories and
how they relate, and each data source has to define their own icon to use for the
hashtag, and so on.
The `Site` serializer has two new attributes that source data from `HashtagAutocompleteService`.
There is `hashtag_icons` that is just a simple array of all the different icons that
can be used for allowlisting in our markdown pipeline, and there is `hashtag_context_configurations`
that is used to store the type priority orders for each registered context.
When sending emails, we cannot render the SVG icons for hashtags, so
we need to change the HTML hashtags to the normal `#hashtag` text.
**Markdown**
The `hashtag-autocomplete.js` file is where I have added the new `hashtag-autocomplete`
markdown rule, and like all of our rules this is used to cook the raw text on both the clientside
and on the serverside using MiniRacer. Only on the server side do we actually reach out to
the database with the `hashtagLookup` function, on the clientside we just render a plainer
version of the hashtag HTML. Only in the composer preview do we do further lookups based
on this.
This rule is the first one (that I can find) that uses the `currentUser` based on a passed
in `user_id` for guardian checks in markdown rendering code. This is the `last_editor_id`
for both the post and chat message. In some cases we need to cook without a user present,
so the `Discourse.system_user` is used in this case.
**Chat Channels**
This also contains the changes required for chat so that chat channels can be used
as a data source for hashtag searches and lookups. This data source will only be
used when `enable_experimental_hashtag_autocomplete` is `true`, so we don't have
to worry about channel results suddenly turning up.
------
**Known Rough Edges**
- Onebox excerpts will not render the icon svg/use tags, I plan to address that in a follow up PR
- Selecting a hashtag + pressing the Quote button will result in weird behaviour, I plan to address that in a follow up PR
- Mixed hashtag contexts for hashtags without a type suffix will not work correctly, e.g. #ux which is both a category and a channel slug will resolve to a category when used inside a post or within a [chat] transcript in that post. Users can get around this manually by adding the correct suffix, for example ::channel. We may get to this at some point in future
- Icons will not show for the hashtags in emails since SVG support is so terrible in email (this is not likely to be resolved, but still noting for posterity)
- Additional refinements and review fixes wil
This commit introduces a new site setting: `block_hotlinked_media`. When enabled, all attempts to hotlink media (images, videos, and audio) will fail, and be replaced with a linked placeholder. Exceptions to the rule can be added via `block_hotlinked_media_exceptions`.
`download_remote_image_to_local` can be used alongside this feature. In that case, hotlinked images will be blocked immediately when the post is created, but will then be replaced with the downloaded version a few seconds later.
This implementation is purely server-side, and does not impact the composer preview.
Technically, there are two stages to this feature:
1. `PrettyText.sanitize_hotlinked_media` is called during `PrettyText.cook`, and whenever new images are introduced by Onebox. It will iterate over all src/srcset attributes in the post HTML and check if they're allowed. If not, the attributes will be removed and replaced with a `data-blocked-hotlinked-src(set)` attribute
2. In the `CookedPostProcessor`, we iterate over all `data-blocked-hotlinked-src(set)` attributes and check whether we have a downloaded version of the media. If yes, we update the src to use the downloaded version. If not, the entire media element is replaced with a placeholder. The placeholder is labelled 'external media', and is a link to the offsite media.
Browsers automatically calculate an aspect ratio based on the width/height attributes of an `<img`. HOWEVER that aspect ratio only applies while the image is loading. Once loaded, it'll use the image's actual dimensions. This can cause things to jump around after loading. For example:
- if a user deliberately inserts false width/height
- the image fails to load (404)
- an optimised image is a few pixels different, due to a rounding when resizing
This decorator explicitly sets the `aspect-ratio` property so that things are consistent throughout the lifetime of all `<img` elements.
This commit extends the original copy-codeblocks initializer,
renaming it to codeblock-buttons, and adding another button
to make the code block fullscreen in a modal window. The fullscreen
code is then run through highlight.js.
This commit also moves much of the code out of the initializer
and into a reusable CodeblockButtons class, so it can also be used
in the fullscreen code modal for the copy + paste button.
The fullscreen button will not be shown if there is no scroll overflow
in the code block, nor will it be shown on mobile. This commit also
changes the fullscreen table button to not show on mobile.
This will make long lines of code much easier to read and interact
with. This is gated behind the same `show_copy_button_on_codeblocks`
site setting.
This fixes rare cases of layout shift caused by images appearing slightly smaller after being loaded.
For example, a 371x1031 image is uploaded. It gets lightboxed, with the generated thumbnail of size 179x500. `height: auto` changes that thumbnail's size (only after being loaded) to 179x497, causing a 3px shift.
I did not observe any regressions with this change.
Previously, it was based on the container of the avatar. However, the
container of the avatar can be extended to contain more than just the
avatar itself. This resulted in the positioning of the avatar flair to
be off.
When rendering the markdown code blocks we replace the
offending characters in the output string with spans highlighting a textual
representation of the character, along with a title attribute with
information about why the character was highlighted.
The list of characters stripped by this fix, which are the bidirectional
characters considered relevant, are:
U+202A
U+202B
U+202C
U+202D
U+202E
U+2066
U+2067
U+2068
U+2069
This api allows to add a dropdown at the bottom of a topic, note that this API is mobile only for now.
Also included in the commit:
- various doc fixes
- adding tests for both buttons and dropdowns APIs
- uses thrown instead of @ember/error to ensure execution is halted when incorrect parameters are given
Previously when clicking the Delete button for small action posts
there was no way to recover this post if the action was accidental.
Now if canRecover is true on the post, which it is just after it
is deleted and the post is fetched from the server again, we show
an undo button which calls the recover endpoint for the post.
We also now disallow the editing of the post if it is deleted, and
show the proper deleted red CSS on the small action post when deleted.
This reverts the new e and q shortcuts for quick-edit, and quote. The current implementation of these is causing issues with quoting on mobile devices.
We intend restore these new shortcuts soon.
* Revert "FIX: Apply quote selection workaround to all browsers (#14558)"
This reverts commit 488f716c16.
* Revert "FIX: selection going missing in Safari (#14557)"
This reverts commit 538fe2cc31.
* Revert "UX: adds shortcuts for quote (q) and fast edit (e) (#14552)"
This reverts commit 2af6052307.
Size of headings increased proportionally with their nesting because
their size was relative to the parent element (used em). This commit
makes headings from posts use rem instead which are relative to the
root HTML element.
<h1><div><h1>test</h1></div></h1> looks the same as <h1>test</h1> now.
