90 lines
3.7 KiB
JavaScript
90 lines
3.7 KiB
JavaScript
import {POST} from '../modules/fetch.js';
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import {showErrorToast} from '../modules/toast.js';
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const preventListener = (e) => e.preventDefault();
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/**
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* Attaches `input` handlers to markdown rendered tasklist checkboxes in comments.
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*
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* When a checkbox value changes, the corresponding [ ] or [x] in the markdown string
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* is set accordingly and sent to the server. On success it updates the raw-content on
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* error it resets the checkbox to its original value.
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*/
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export function initMarkupTasklist() {
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for (const el of document.querySelectorAll(`.markup[data-can-edit=true]`) || []) {
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const container = el.parentNode;
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const checkboxes = el.querySelectorAll(`.task-list-item input[type=checkbox]`);
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for (const checkbox of checkboxes) {
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if (checkbox.hasAttribute('data-editable')) {
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return;
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}
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checkbox.setAttribute('data-editable', 'true');
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checkbox.addEventListener('input', async () => {
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const checkboxCharacter = checkbox.checked ? 'x' : ' ';
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const position = parseInt(checkbox.getAttribute('data-source-position')) + 1;
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const rawContent = container.querySelector('.raw-content');
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const oldContent = rawContent.textContent;
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const encoder = new TextEncoder();
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const buffer = encoder.encode(oldContent);
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// Indexes may fall off the ends and return undefined.
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if (buffer[position - 1] !== '['.codePointAt(0) ||
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buffer[position] !== ' '.codePointAt(0) && buffer[position] !== 'x'.codePointAt(0) && buffer[position] !== 'X'.codePointAt(0) ||
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buffer[position + 1] !== ']'.codePointAt(0)) {
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// Position is probably wrong. Revert and don't allow change.
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checkbox.checked = !checkbox.checked;
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throw new Error(`Expected position to be space, x or X and surrounded by brackets, but it's not: position=${position}`);
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}
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buffer.set(encoder.encode(checkboxCharacter), position);
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const newContent = new TextDecoder().decode(buffer);
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if (newContent === oldContent) {
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return;
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}
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// Prevent further inputs until the request is done. This does not use the
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// `disabled` attribute because it causes the border to flash on click.
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for (const checkbox of checkboxes) {
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checkbox.addEventListener('click', preventListener);
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}
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try {
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const editContentZone = container.querySelector('.edit-content-zone');
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const updateUrl = editContentZone.getAttribute('data-update-url');
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const context = editContentZone.getAttribute('data-context');
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const contentVersion = editContentZone.getAttribute('data-content-version');
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const requestBody = new FormData();
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requestBody.append('ignore_attachments', 'true');
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requestBody.append('content', newContent);
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requestBody.append('context', context);
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requestBody.append('content_version', contentVersion);
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const response = await POST(updateUrl, {data: requestBody});
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const data = await response.json();
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if (response.status === 400) {
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showErrorToast(data.errorMessage);
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return;
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}
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editContentZone.setAttribute('data-content-version', data.contentVersion);
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rawContent.textContent = newContent;
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} catch (err) {
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checkbox.checked = !checkbox.checked;
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console.error(err);
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}
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// Enable input on checkboxes again
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for (const checkbox of checkboxes) {
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checkbox.removeEventListener('click', preventListener);
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}
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});
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}
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// Enable the checkboxes as they are initially disabled by the markdown renderer
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for (const checkbox of checkboxes) {
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checkbox.disabled = false;
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}
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}
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}
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