Close #23073.
Used the solution as reference to the reply:
https://github.com/go-gitea/gitea/issues/23073#issuecomment-1440124609
Here made the change inside the `contextpopup.js` because this is where
the popup component is created and tippy configuration is given.
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
### The CustomEvent prefix
There was already `ce-quick-submit`, the `ce-` prefix seems better than
`us-`. Rename the only `us-` prefixed `us-load-context-popup` to `ce-`
prefixed.
### Styles and Attributes in Go HTML Template
https://github.com/go-gitea/gitea/pull/21855#issuecomment-1429643073
Suggest to stick to `class="c1 {{if $var}}c2{{end}}"`
The readability and maintainability should be applied to the code which
is read by developers, but not for the generated outputs.
The template code is the code for developers, while the generated HTML
are only for browsers.
The `class="c1 {{if $var}}c2{{end}}"` style is clearer for developers
and more intuitive, and the generated HTML also makes browsers happy (a
few spaces do not affect anything)
Think about a more complex case:
* `class="{{if $active}}active{{end}} menu item {{if $show}}show{{end}}
{{if $warn}}warn{{end}}"`
* --vs--
* `class="{{if $active}}active {{end}}menu item{{if $show}}
show{{end}}{{if $warn}} warn{{end}}"`
The first style make it clearer to see each CSS class name with its
`{{if}}` block.
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
It is convenient to be able to toggle off this option after removing /
from the name. This ensures the muted state is communicated to blind
users even when the input is not fully disabled.
Part of #22974
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Close #23241
Before: press Ctrl+Enter in the Code Review Form, a single comment will
be added.
After: press Ctrl+Enter in the Code Review Form, start the review with
pending comments.
The old name `is_review` is not clear, so the new code use
`pending_review` as the new name.
Co-authored-by: delvh <leon@kske.dev>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>
## TLDR
* Fix the broken page / broken image problem when click "Install"
* Close #20089
* Fix the Password Hash Algorithm display problem for #22942
* Close #23183
* Close #23184
## Details
### The broken page / broken image problem when click "Install"
(Redirect failed after install gitea #23184)
Before: when click "install", all new requests will fail, because the
server has been restarted. Users just see a broken page with broken
images, sometimes the server is not ready but the user would have been
redirect to "/user/login" page, then the users see a new broken page
(connection refused or something wrong ...)
After: only check InstallLock=true for necessary handlers, and sleep for
a while before restarting the server, then the browser has enough time
to load the "post-install" page. And there is a script to check whether
"/user/login" is ready, the user will only be redirected to the login
page when the server is ready.
### During new instance setup make 'Gitea Base URL' filled from
window.location.origin #20089
If the "app_url" input contains `localhost` (the default value from
config), use current window's location href as the `app_url` (aka
ROOT_URL)
### Fix the Password Hash Algorithm display problem for "Provide the
ability to set password hash algorithm parameters #22942"
Before: the UI shows `pbkdf2$50000$50`
<details>
![image](https://user-images.githubusercontent.com/2114189/221917143-e1e54798-1698-4fee-a18d-00c48081fc39.png)
</details>
After: the UI shows `pbkdf2`
<details>
![image](https://user-images.githubusercontent.com/2114189/221916999-97a15be8-2ebb-4a01-bf93-dac18e354fcc.png)
</details>
### GET data: net::ERR_INVALID_URL #23183
Cause by empty `data:` in `<link rel="manifest"
href="data:{{.ManifestData}}">`
---------
Co-authored-by: Jason Song <i@wolfogre.com>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>
The reason why quote reply is empty is when quote reply is clicked, it
triggers the click function on `.comment-form-reply` button, and when
the first time this function is triggered, easyMDE for the reply has not
yet initialized, so that click handler of `.quote-reply` button in
`repo-legacy.js` got an `undefined` as easyMDE, and the following lines
which put quoted reply into the easyMDE is not executed.
The workaround in this PR is to pass the replied content to
'.comment-form-reply' button if easyMDE is not yet initialized (quote
reply first clicked) and put the replied content into it the after
easyMDE is created.
Now quote reply on first click:
https://user-images.githubusercontent.com/17645053/221452823-fc699d50-1649-4af1-952e-f04fc8d2978e.mov
<br />
Update:
The above change is not appropriate as stated in the
[comment](https://github.com/go-gitea/gitea/pull/23168#issuecomment-1445562284)
Use await instead
Close #22075.
Close #23247.
Close #10468
Without SimpleMDE/EasyMDE, using Simple Textarea, the button text could
be changed when content changes.
After introducing SimpleMDE/EasyMDE, there is no code for updating the
button text.
Using `touchstart` for `click` events is a black magic for mobile
browsers (Google: `fastclick`).
However, it causes many UX problems if the fastclick is used without
careful design.
Fomantic UI uses this fastclick for its `dimmer` and `dropdown`, it
makes mobile users feel strange when they "touch" the dropdown menu.
This PR uses a simple patch to fix that behavior. Then the Fomantic
dropdown only uses `click` for click events.
This PR is simple enough and won't cause hidden bugs even if the patch
doesn't work. In the future, if there are more patches for Fomantic UI,
the patches could be placed in a directory like
`web_src/fomantic/patches/001-fix-click-touchstart`, etc.
![image](https://user-images.githubusercontent.com/2114189/220551915-bd28e8cc-507f-43c7-bb4a-b24f7ff3934d.png)
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
As the title. Label/assignee share the same code.
* Close #22607
* Close #20727
Also:
* partially fix for #21742, now the comment reaction and menu work with
keyboard.
* partially fix for #17705, in most cases the comment won't be lost.
* partially fix for #21539
* partially fix for #20347
* partially fix for #7329
### The `Enter` support
Before, if user presses Enter, the dropdown just disappears and nothing
happens or the window reloads.
After, Enter can be used to select/deselect labels, and press Esc to
hide the dropdown to update the labels (still no way to cancel ....
maybe you can do a Cmd+R or F5 to refresh the window to discard the
changes .....)
This is only a quick patch, the UX is still not perfect, but it's much
better than before.
### The `confirm` before reloading
And more fixes for the `reload` problem, the new behaviors:
* If nothing changes (just show/hide the dropdown), then the page won't
be reloaded.
* If there are draft comments, show a confirm dialog before reloading,
to avoid losing comments.
That's the best effect can be done at the moment, unless completely
refactor these dropdown related code.
Screenshot of the confirm dialog:
<details>
![image](https://user-images.githubusercontent.com/2114189/220538288-e2da8459-6a4e-43cb-8596-74057f8a03a2.png)
</details>
---------
Co-authored-by: Brecht Van Lommel <brecht@blender.org>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
This PR is a possible solution for issue #22866. Main change is to add a
`author-wrapper` class around author name, like the wrapper added to
message. The `max-width` is set to 200px on PC, and 100px on mobile
device for now.
- Upgrade stylelint and plugin
- Change ruleset to a explicit one, with all deprecated rules removed
- Fix new issues detected by value validation
For `overflow: overlay` see
https://github.com/stylelint/stylelint/issues/6667
`.gt-relative` is also `position: relative !important;`
There are `gt-pr-?` styles below (line 140) for `padding-right`, which
makes `.gt-pr` ambiguous
Co-authored-by: delvh <leon@kske.dev>
Co-authored-by: John Olheiser <john.olheiser@gmail.com>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>
Follows:
* #22950
The dropdown menu works well without these codes.
The reason is that the event bubbling still works for the dropdown menu,
the Fomantic UI dropdown menu module will hide the menu correctly if an
item is clicked.
Since #22632, when a commit status has multiple checks, no check is
shown at all (hence no way to see the other checks).
This PR fixes this by always adding a tag with the
`.commit-statuses-trigger` to the DOM (the `.vm` is for vertical
alignment).
![2023-02-13-120528](https://user-images.githubusercontent.com/3864879/218441846-1a79c169-2efd-46bb-9e75-d8b45d7cc8e3.png)
---------
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Close #22847
This PR:
* introduce Gitea's own `showElem` and related functions
* remove jQuery show/hide
* remove .hide class
* remove inline style=display:none
From now on:
do not use:
* "[hidden]" attribute: it's too weak, can not be applied to an element
with "display: flex"
* ".hidden" class: it has been polluted by Fomantic UI in many cases
* inline style="display: none": it's difficult to tweak
* jQuery's show/hide/toggle: it can not show/hide elements with
"display: xxx !important"
only use:
* this ".gt-hidden" class
* showElem/hideElem/toggleElem functions in "utils/dom.js"
cc: @silverwind , this is the all-in-one PR
Add a new "exclusive" option per label. This makes it so that when the
label is named `scope/name`, no other label with the same `scope/`
prefix can be set on an issue.
The scope is determined by the last occurence of `/`, so for example
`scope/alpha/name` and `scope/beta/name` are considered to be in
different scopes and can coexist.
Exclusive scopes are not enforced by any database rules, however they
are enforced when editing labels at the models level, automatically
removing any existing labels in the same scope when either attaching a
new label or replacing all labels.
In menus use a circle instead of checkbox to indicate they function as
radio buttons per scope. Issue filtering by label ensures that only a
single scoped label is selected at a time. Clicking with alt key can be
used to remove a scoped label, both when editing individual issues and
batch editing.
Label rendering refactor for consistency and code simplification:
* Labels now consistently have the same shape, emojis and tooltips
everywhere. This includes the label list and label assignment menus.
* In label list, show description below label same as label menus.
* Don't use exactly black/white text colors to look a bit nicer.
* Simplify text color computation. There is no point computing luminance
in linear color space, as this is a perceptual problem and sRGB is
closer to perceptually linear.
* Increase height of label assignment menus to show more labels. Showing
only 3-4 labels at a time leads to a lot of scrolling.
* Render all labels with a new RenderLabel template helper function.
Label creation and editing in multiline modal menu:
* Change label creation to open a modal menu like label editing.
* Change menu layout to place name, description and colors on separate
lines.
* Don't color cancel button red in label editing modal menu.
* Align text to the left in model menu for better readability and
consistent with settings layout elsewhere.
Custom exclusive scoped label rendering:
* Display scoped label prefix and suffix with slightly darker and
lighter background color respectively, and a slanted edge between them
similar to the `/` symbol.
* In menus exclusive labels are grouped with a divider line.
---------
Co-authored-by: Yarden Shoham <hrsi88@gmail.com>
Co-authored-by: Lauris BH <lauris@nix.lv>
This PR follows:
* #21986
* #22831
This PR also introduce customized HTML elements, which would also help
problems like:
* #17760
* #21429
* #21440
With customized HTML elements, there won't be any load-search-replace
operations, and it can avoid page flicking (which @silverwind cares a
lot).
Browser support:
https://developer.mozilla.org/en-US/docs/Web/API/Window/customElements
# FAQ
## Why the component has the prefix?
As usual, I would strongly suggest to add prefixes for our own/private
names. The dedicated prefix will avoid conflicts in the future, and it
makes it easier to introduce various 3rd components, like GitHub's
`relative-time` component. If there is no prefix, it's impossible to
introduce another public component with the same name in the future.
## Why the `custcomp.js` is loaded before HTML body? The `index.js` is
after HTML body.
Customized components must be registered before the content loading.
Otherwise there would be still some flicking.
`custcomp.js` should have its own dependencies and should be very light,
so it won't affect the page loading time too much.
## Why use `data-url` attribute but not use the `textContent`?
According to the standard, the `connectedCallback` occurs on the
tag-opening moment. The element's children are not ready yet.
## Why not use `{{.GuessCurrentOrigin $.ctx ...}}` to let backend decide
the absolute URL?
It's difficult for backend to guess the correct protocol(scheme)
correctly with zero configuration. Generating the absolute URL from
frontend can guarantee that the URL is 100% correct -- since the user is
visiting it.
# Screenshot
<details>
![image](https://user-images.githubusercontent.com/2114189/218256757-a267c8ba-3108-4755-9ae5-329f1b08f615.png)
</details>
Previously, a file/directory name was simply cut when it was too long.
Now, we display the browser-native tooltip (`title`) instead, so you can
still see it when hovering over it.
In this case, we don't use the normal `tippy` tooltips for three
reasons:
1. Vue components are not included in the global tooltip initialization
2. Vue components would need to initialize their tooltips themselves
whenever their content is changed
3. The tooltips are shown too long under the default configuration (the
tooltip one element above is still shown when hovering on the element
below)
Fixes #22915
## Appearance
![image](https://user-images.githubusercontent.com/51889757/219049642-43668a38-0e86-42bf-a1d0-3742c4dc7fd9.png)
## Room for future improvement
We could think about displaying the whole file path in the title, not
just its name.
This is not done at the moment:
![image](https://user-images.githubusercontent.com/51889757/219050689-1e6e3d57-f2bf-48be-8553-415e744a6e10.png)
---------
Co-authored-by: techknowlogick <techknowlogick@gitea.io>
Really fix #22883, close #22901
I made a mistake that the global styles in RepoActionView.vue could
still pollute global styles (I forgot that the code of this component is
still loaded on every page, instead of loaded on demand)
This PR makes a complete fix: only change the page's full-height
behavior if the component is used.
Screenshot after the fix:
<details>
![image](https://user-images.githubusercontent.com/2114189/218664776-0dbcd469-2c36-4e17-972f-e44fa3b81ba6.png)
</details>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
As discussed in #22847 the helpers in helpers.less need to have a
separate prefix as they are causing conflicts with fomantic styles
This will allow us to have the `.gt-hidden { display:none !important; }`
style that is needed to for the reverted PR.
Of note in doing this I have noticed that there was already a conflict
with at least one chroma style which this PR now avoids.
I've also added in the `gt-hidden` style that matches the tailwind one
and switched the code that needed it to use that.
Signed-off-by: Andrew Thornton <art27@cantab.net>
---------
Signed-off-by: Andrew Thornton <art27@cantab.net>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
Collapsing folders currently just throws a console error
```
index.js?v=1.19.0~dev-403-gb6b8feb3d:10 TypeError: this.$set is not a function
at Proxy.handleClick (index.js?v=1.19.0~dev-403-gb6b8feb3d:58:7159)
at index.js?v=1.19.0~dev-403-gb6b8feb3d:58:6466
at index.js?v=1.19.0~dev-403-gb6b8feb3d:10:93922
at ce (index.js?v=1.19.0~dev-403-gb6b8feb3d:10:1472)
at Q (index.js?v=1.19.0~dev-403-gb6b8feb3d:10:1567)
at HTMLDivElement.$e (index.js?v=1.19.0~dev-403-gb6b8feb3d:10:79198)
```
This PR fixes this and allows folders to be collapsed again.
Also:
- better cursor interaction with folders
- added some color to the diff detail stats
- remove green link color from all the file names
Screenshots:
![image](https://user-images.githubusercontent.com/9765622/218269712-2f3dda55-6d70-407f-8d34-2a5d9c8df548.png)
![image](https://user-images.githubusercontent.com/9765622/218269714-6ce8a954-daea-4ed6-9eea-8b2323db4d8f.png)
---------
Co-authored-by: zeripath <art27@cantab.net>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Original Issue: https://github.com/go-gitea/gitea/issues/22102
This addition would be a big benefit for design and art teams using the
issue tracking.
The preview will be the latest "image type" attachments on an issue-
simple, and allows for automatic updates of the cover image as issue
progress is made!
This would make Gitea competitive with Trello... wouldn't it be amazing
to say goodbye to Atlassian products? Ha.
First image is the most recent, the SQL will fetch up to 5 latest images
(URL string).
All images supported by browsers plus upcoming formats: *.avif *.bmp
*.gif *.jpg *.jpeg *.jxl *.png *.svg *.webp
The CSS will try to center-align images until it cannot, then it will
left align with overflow hidden. Single images get to be slightly
larger!
Tested so far on: Chrome, Firefox, Android Chrome, Android Firefox.
Current revision with light and dark themes:
![image](https://user-images.githubusercontent.com/24665/207066878-58e6bf73-0c93-4caa-8d40-38f4432b3578.png)
![image](https://user-images.githubusercontent.com/24665/207066555-293f65c3-e706-4888-8516-de8ec632d638.png)
---------
Co-authored-by: Jason Song <i@wolfogre.com>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: delvh <dev.lh@web.de>
partially fix #19345
This PR add some `Link` methods for different objects. The `Link`
methods are not different from `HTMLURL`, they are lack of the absolute
URL. And most of UI `HTMLURL` have been replaced to `Link` so that users
can visit them from a different domain or IP.
This PR also introduces a new javascript configuration
`window.config.reqAppUrl` which is different from `appUrl` which is
still an absolute url but the domain has been replaced to the current
requested domain.
Added a new captcha(cloudflare turnstile) and its corresponding
document. Cloudflare turnstile official instructions are here:
https://developers.cloudflare.com/turnstile
Signed-off-by: ByLCY <bylcy@bylcy.dev>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: Jason Song <i@wolfogre.com>
This PR fixes two bugs with Webauthn support:
* There was a longstanding bug within webauthn due to the backend using
URLEncodedBase64 but the javascript using decoding using plain base64.
This causes intermittent issues with users reporting decoding errors.
* Following the recent upgrade to webauthn there was a change in the way
the library expects RPOrigins to be configured. This leads to the
Relying Party Origin not being configured and prevents registration.
Fix #22507
Signed-off-by: Andrew Thornton <art27@cantab.net>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
Replace #22593
This is a general approach to add ARIA support for all Fomantic UI
checkboxes (including radioboxes)
* Pros:
* General approach, it works for all Fomantic UI checkboxes / radioboxes
* No need to write IDs manually everywhere
* No need to tell new contributors to write IDs again and again
* Cons:
* Slightly affects performance, but it's really trivial, because there
was already a heavy `$('.ui.checkbox').checkbox()` for Fomantic UI
before. So everything is still fine.
Screenshot (from the repo setting page, which has various checkboxes):
<details>
![image](https://user-images.githubusercontent.com/2114189/214480937-3a54d36f-55c3-49de-9c45-c4bb21f1f4c6.png)
</details>
There was an unintended regression in #21124 which assumed that
`.commits-list .message-wrapper` would only match the commit summaries
on `/{owner}/{name}/commits/*`. This assumption is incorrect as the
directory/file view also uses a `.commits-list` wrapper.
Rather than completely restructure this page this PR simply adjusts the
styling to again use `display: inline-block;` for `#repo-files-table
.commit-list .message-wrapper`
Fix #22360
Signed-off-by: Andrew Thornton <art27@cantab.net>
Once an attachment is successfully uploaded via Dropzone, display a
"Copy link" under the "Remove file" button.
Once the button is clicked, depending if the attachment is an image or a
file, the appropriate markup is written to the clipboard, so it can be
conveniently pasted in the description.
In #22447 it was noticed that display environments were not working
correctly. This was due to the setting displayMode not being set.
Further it was noticed that the error was not being displayed correctly.
This PR fixes both of these issues by forcibly setting the displayMode
setting and corrects an error in displayError.
Fix #22447
Signed-off-by: Andrew Thornton <art27@cantab.net>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
There was a serious regression in #21012 which broke the Show More
button on the diff page, and the show more button was also broken on the
file tree too.
This PR fixes this by resetting the pageData.diffFiles as the vue
watched value and reattachs a function to the show more button outside
of the file tree view.
Fix #22380
Signed-off-by: Andrew Thornton <art27@cantab.net>
Co-authored-by: John Olheiser <john.olheiser@gmail.com>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Fix #22286
When timetracking is disabled, the stop watch top bar icon should be
hidden.
When the stop watch recording popup, it should be allowed to hide with
some operation. Now click any place on this page will hide the popup
window.
- Add Copy button to mermaid diagrams which copies their source.
- Set tippy to not hide on click and avoid tooltip re-creation for
temporary tooltips. This avoids hide and show when copying repo url.
Popovers still hide the tooltip as usual.
<img width="815" alt="Screenshot 2022-12-23 at 14 02 32"
src="https://user-images.githubusercontent.com/115237/209341696-98e30953-f246-46d9-9157-2ececfd791c9.png">
Co-authored-by: Lauris BH <lauris@nix.lv>
Co-authored-by: KN4CK3R <admin@oldschoolhack.me>
- Replace all default exports with named exports, except for Vue SFCs
- Remove names from Vue SFCs, they are automatically inferred from the
filename
- Misc whitespace-related tweaks
As described in the linked issue (#22091), semi-transparent UI elements
would result in JS errors due to the fact that the CSS `backgroundColor`
element was being matched by the pattern
`^rgb\((\d+),\s*(\d+),\s*(\d+)\)$`, which does not take the alpha
channel into account.
I changed the pattern to `^rgba?\((\d+),\s*(\d+),\s*(\d+).*\)$`.
This new pattern accepts both `rgb` and `rgba` tuples, and ignores the
alpha channel (that little `.*` at the end) from the sorting criteria.
The reason why I chose to ignore alpha is because when it comes to
kanban colour sorting, only the hue is important; the order of the
panels should stay the same, even if some of them are transparent.
Alternative solutions were discussed in the bug report and are included
here for completeness:
1. Change the regex from ^rgb\((\d+),\s*(\d+),\s*(\d+)\)$ to
^rgba?\((\d+),\s*(\d+),\s*(\d+)(,\s*(\d+(\.\d+)?))?\)$ (alpha channel is
a float or NaN on 5th group) and include the alpha channel in the
sorting criteria.
2. Rethink on why you're reading colours out of the CSS in the first
place, then reformat this sorting procedure.
Co-authored-by: Lauris BH <lauris@nix.lv>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>
The hashchange event did not fire on re-click of a active anchor.
Instead, use the click event which always fires.
Fixes: https://github.com/go-gitea/gitea/issues/21680
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: zeripath <art27@cantab.net>
If a deleted-branch has already been restored, a request to restore it
again will cause a NPE. This PR adds detection for this case, but also
disables buttons when they're clicked in order to help prevent
accidental repeat requests.
Fix #21930
Signed-off-by: Andrew Thornton <art27@cantab.net>
When starting a scroll while the mouse is over a mermaid diagram, the
scroll sometimes propagates to the iframe, preventing the parent page
from scrolling. Fix this by disabling scroll inside the iframe. This is
not a problem because those frames are never meant to scroll. Bug seems
to affect Firefox only.
![scroll](https://user-images.githubusercontent.com/115237/203847578-6831e3c8-9df4-4577-8501-822fb9ea1278.gif)
- Fix regression from #21893 which had misaligned a few tables like repo
lists and e-mails
- Bring githooks list in line with webhooks list for styling
- Change webhook list icons to just colored dots, like githook list
- Increase size of dot in webhook and githook list from 16 to 22px
This PR adds a button to allow quickly clearing the merge message of a
PR. The button will remove everything but the git trailers.
I found myself often pruning the commit message before merging,
especially for PRs generated by renovate - renovate puts a very long and
detailed comment with the full changelog in each PR it opens. This
clutters the commit message. However, I want to explicitly preserve the
git commit trailers. Doing this manually works, but having a button is a
lot easier.
Screenshot:
![image](https://user-images.githubusercontent.com/13721712/197337525-d456d0f8-1f7c-43a9-815d-ca93b1e7a90a.png)
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
Co-authored-by: delvh <dev.lh@web.de>
This should eliminate all non-variable color usage in the styles, making
gitea fully themeable via CSS variables. Also, it adds a linter to
enforce variables for colors.