Fixes #23645
* Added `describedby` attribute to the reference element.
* Eliminated `aria-expanded` attribute to the reference element in order
to conform strictly with WCAG 2.1 rules.
## TLDR
* Improve performance: lazy creating the tippy instances.
* Transparently support all "tooltip" elements, no need to call
`initTooltip` again and again.
* Fix a temporary tooltip re-entrance bug, which causes showing temp
content forever.
* Upgrade vue3-calendar-heatmap to 2.0.2 with lazy tippy init
(initHeatmap time decreases from 100ms to 50ms)
## Details
### The performance
Creating a lot of tippy tooltip instances is expensive. This PR doesn't
create all tippy tooltip instances, instead, it only adds "mouseover"
event listener to necessary elements, and then switches to the tippy
tooltip
### The general approach for all tooltips
Before, dynamically generated tooltips need to be called with
`initTooltip`.
After, use MutationObserver to:
* Attach the event listeners to newly created tooltip elements, work for
Vue (easier than before)
* Catch changed attributes and update the tooltip content (better than
before)
It does help a lot, eg:
1a4efa0ee9/web_src/js/components/PullRequestMergeForm.vue (L33-L36)
### Temporary tooltip re-entrance bug
To reproduce, on try.gitea.io, click the "copy clone url" quickly, then
the tooltip will be "Copied!" forever.
After this PR, with the help of `attachTippyTooltip`, the tooltip
content could be reset to the default correctly.
### Other changes
* `data-tooltip-content` is preferred from now on, the old
`data-content` may cause conflicts with other modules.
* `data-placement` was only used for tooltip, so it's renamed to
`data-tooltip-placement`, and removed from `createTippy`.
This PR follows #22599 and #23450
The major improvements:
1. The `aria-*.js` are totally transparent now, no need to call
`attachDropdownAria` explicitly anymore.
* It hooks the `$.fn.checkbox` and `$.fn.dropdown`, then our patch
works.
* It makes all dynamically generated checkbox/dropdown work with a11y
without any change
* eg: the `conversation.find('.dropdown').dropdown();` in `repo-diff.js`
2. Since it's totally transparent now, it could be easier to modify or
remove in the future.
3. It handles all selection labels as well (by onLabelCreate), so it
supports "multiple selection dropdown" now.
* It partially completes one of my TODOs: `TODO: multiple selection is
not supported yet.`
4. The code structure is clearer, code blocks are splitted into
different functions.
* The old `attachOneDropdownAria` was splitted into separate functions.
* It makes it easier to add more fine tunes in the future, and co-work
with contributors.
6. The code logic is similar as before, only two new parts:
1. the `ariaCheckboxFn` and `ariaDropdownFn` functions
2. the `onLabelCreate` and `updateSelectionLabel` functions
In `aria-dropdown.js` I had to mix jQuery and Vanilla JS somewhat, I
think the code is still understandable, otherwise the code would be much
more complex to read.
Thanks to fsologureng for the idea about "improving the 'delete icon'
with aria attributes".
If there is anything unclear or incorrect, feel free to ask and discuss,
or propose new PRs for it.
This PR is extracted from #23346 to address some unclear (I don't
understand) code-belonging concerns.
This PR needs to be backported, otherwise the `aria.js` is too buggy in
some cases. Since there would be two minor conflicts, I will do the
backport manually.
Before: the `aria.js` is still buggy in some cases.
After: tested with AppleVoice, Android TalkBack
* Fix incorrect dropdown init code
* Fix incorrect role element (the menu role should be on the `$menu`
element, but not on the `$focusable`)
* Fix the focus-show-click-hide problem on mobile. Now the language menu
works as expected
* Fix incorrect dropdown template function setting
* Clarify the logic in aria.js
* Hide item's tippy after menu gets hidden
* Fix incorrect tippy `setProps` after `destroy`
* Fix UI lag problem when page gets redirected during menu hiding
animation with screen reader
* Improve comments
* Implement the layout proposed by #19861
<details>
d74a7efb60/web_src/js/features/aria.md (L38-L47)
</details>
- 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>
Each repo has a bar which shows the used programming languages. If you want to know, what language is behind a color, you need to click the bar. With this PR, you just need to hover over the color the view the name.
Tippy allows HTML strings to be passed as content but we do not use this
feature (we do pass HTML only as Element), so it's better to disable it
for increased security.
Ref: https://atomiks.github.io/tippyjs/v6/html-content/#string
Previous solution that re-purposed the 'hide' class by making it
`!important` had various unintended side-effects where jQuery .show() was
not able to outweight it. Use a separate class to prevent these
interactions.
By appending the tooltips to `document.body`, we can avoid any stacking context issues caused by surrounding element's CSS.
This uses [tippy.js](https://github.com/atomiks/tippyjs) instead of Fomantic popups. We should aim to replace all Fomantic popups with this eventually and then get rid of the Fomantic `popup` module completely.
