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