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forgejo/web_src/js/features/pull-view-file.js
delvh e95b42e187
Improve accessibility when (re-)viewing files (#24817)
Visually, nothing should have changed.
Changes include
- Convert most `<a [no href]>` to `<button>` when (re-)viewing files:
- `<a [no href]>` are, by HTML definition, not a link and hence cannot
be focused
- `<a class="ui button">` can now be clicked (again?) using
<kbd>Enter</kbd>
- Previously, the installed keypress handler on `.ui.button` elements
disabled it for links somehow
- The `(un)escape file`, the `expand section` and the `expand/collapse
file` buttons can now be focused (and subsequently clicked using only
the keyboard)
- You can now press <kbd>Space</kbd> on a focused `View file` checkbox
to mark the file as viewed.
- previously, this was impossible as this checkbox listened on the wrong
event listener

The `add code comment` button has been left inaccessible for now as it
requires quite a bit of extra logic so that it is unhidden when it is
focused (you can otherwise focus it without seeing it as you are not
hovering on the corresponding line).

---------

Co-authored-by: silverwind <me@silverwind.io>
2023-05-21 20:47:41 +00:00

91 lines
4.2 KiB
JavaScript

import {setFileFolding} from './file-fold.js';
const {csrfToken, pageData} = window.config;
const prReview = pageData.prReview || {};
const viewedStyleClass = 'viewed-file-checked-form';
const viewedCheckboxSelector = '.viewed-file-form'; // Selector under which all "Viewed" checkbox forms can be found
const expandFilesBtnSelector = '#expand-files-btn';
const collapseFilesBtnSelector = '#collapse-files-btn';
// Refreshes the summary of viewed files if present
// The data used will be window.config.pageData.prReview.numberOf{Viewed}Files
function refreshViewedFilesSummary() {
const viewedFilesProgress = document.getElementById('viewed-files-summary');
viewedFilesProgress?.setAttribute('value', prReview.numberOfViewedFiles);
const summaryLabel = document.getElementById('viewed-files-summary-label');
if (summaryLabel) summaryLabel.innerHTML = summaryLabel.getAttribute('data-text-changed-template')
.replace('%[1]d', prReview.numberOfViewedFiles)
.replace('%[2]d', prReview.numberOfFiles);
}
// Explicitly recounts how many files the user has currently reviewed by counting the number of checked "viewed" checkboxes
// Additionally, the viewed files summary will be updated if it exists
export function countAndUpdateViewedFiles() {
// The number of files is constant, but the number of viewed files can change because files can be loaded dynamically
prReview.numberOfViewedFiles = document.querySelectorAll(`${viewedCheckboxSelector} > input[type=checkbox][checked]`).length;
refreshViewedFilesSummary();
}
// Initializes a listener for all children of the given html element
// (for example 'document' in the most basic case)
// to watch for changes of viewed-file checkboxes
export function initViewedCheckboxListenerFor() {
for (const form of document.querySelectorAll(`${viewedCheckboxSelector}:not([data-has-viewed-checkbox-listener="true"])`)) {
// To prevent double addition of listeners
form.setAttribute('data-has-viewed-checkbox-listener', true);
// The checkbox consists of a div containing the real checkbox with its label and the CSRF token,
// hence the actual checkbox first has to be found
const checkbox = form.querySelector('input[type=checkbox]');
checkbox.addEventListener('input', function() {
// Mark the file as viewed visually - will especially change the background
if (this.checked) {
form.classList.add(viewedStyleClass);
prReview.numberOfViewedFiles++;
} else {
form.classList.remove(viewedStyleClass);
prReview.numberOfViewedFiles--;
}
// Update viewed-files summary and remove "has changed" label if present
refreshViewedFilesSummary();
const hasChangedLabel = form.parentNode.querySelector('.changed-since-last-review');
hasChangedLabel?.remove();
// Unfortunately, actual forms cause too many problems, hence another approach is needed
const files = {};
files[checkbox.getAttribute('name')] = this.checked;
const data = {files};
const headCommitSHA = form.getAttribute('data-headcommit');
if (headCommitSHA) data.headCommitSHA = headCommitSHA;
fetch(form.getAttribute('data-link'), {
method: 'POST',
headers: {'X-Csrf-Token': csrfToken},
body: JSON.stringify(data),
});
// Fold the file accordingly
const parentBox = form.closest('.diff-file-header');
setFileFolding(parentBox.closest('.file-content'), parentBox.querySelector('.fold-file'), this.checked);
});
}
}
export function initExpandAndCollapseFilesButton() {
// expand btn
document.querySelector(expandFilesBtnSelector)?.addEventListener('click', () => {
for (const box of document.querySelectorAll('.file-content[data-folded="true"]')) {
setFileFolding(box, box.querySelector('.fold-file'), false);
}
});
// collapse btn, need to exclude the div of “show more”
document.querySelector(collapseFilesBtnSelector)?.addEventListener('click', () => {
for (const box of document.querySelectorAll('.file-content:not([data-folded="true"])')) {
if (box.getAttribute('id') === 'diff-incomplete') continue;
setFileFolding(box, box.querySelector('.fold-file'), true);
}
});
}