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import $ from 'jquery';
import attachTribute from '../tribute.js';
const {appSubUrl} = window.config;
function loadScript(url) {
return new Promise((resolve, reject) => {
const script = document.createElement('script');
script.async = true;
script.addEventListener('load', () => {
resolve();
});
script.addEventListener('error', (e) => {
reject(e.error);
});
script.src = url;
document.body.appendChild(script);
});
}
/**
* @returns {EasyMDE}
*/
export async function importEasyMDE() {
// for CodeMirror: the plugins should be loaded dynamically
// https://github.com/codemirror/CodeMirror/issues/5484
// https://github.com/codemirror/CodeMirror/issues/4838
// EasyMDE's CSS should be loaded via webpack config, otherwise our own styles can not overwrite the default styles.
const [{default: EasyMDE}, {default: CodeMirror}] = await Promise.all([
import(/* webpackChunkName: "easymde" */'easymde'),
import(/* webpackChunkName: "codemirror" */'codemirror'),
]);
// CodeMirror plugins must be loaded by a "Plain browser env"
window.CodeMirror = CodeMirror;
await Promise.all([
loadScript(`${appSubUrl}/assets/vendor/plugins/codemirror/addon/mode/loadmode.js`),
loadScript(`${appSubUrl}/assets/vendor/plugins/codemirror/mode/meta.js`),
]);
// the loadmode.js/meta.js would set the modeURL/modeInfo properties, so we check it to make sure our loading works
if (!CodeMirror.modeURL || !CodeMirror.modeInfo) {
throw new Error('failed to load plugins for CodeMirror');
}
CodeMirror.modeURL = `${appSubUrl}/assets/vendor/plugins/codemirror/mode/%N/%N.js`;
return EasyMDE;
}
/**
* create an EasyMDE editor for comment
* @param textarea jQuery or HTMLElement
* @param easyMDEOptions the options for EasyMDE
* @returns {null|EasyMDE}
*/
export async function createCommentEasyMDE(textarea, easyMDEOptions = {}) {
if (textarea instanceof $) {
textarea = textarea[0];
}
if (!textarea) {
return null;
}
const EasyMDE = await importEasyMDE();
const easyMDE = new EasyMDE({
autoDownloadFontAwesome: false,
element: textarea,
forceSync: true,
renderingConfig: {
singleLineBreaks: false,
},
indentWithTabs: false,
tabSize: 4,
spellChecker: false,
toolbar: ['bold', 'italic', 'strikethrough', '|',
'heading-1', 'heading-2', 'heading-3', 'heading-bigger', 'heading-smaller', '|',
'code', 'quote', '|', {
name: 'checkbox-empty',
action(e) {
const cm = e.codemirror;
cm.replaceSelection(`\n- [ ] ${cm.getSelection()}`);
cm.focus();
},
className: 'fa fa-square-o',
title: 'Add Checkbox (empty)',
},
{
name: 'checkbox-checked',
action(e) {
const cm = e.codemirror;
cm.replaceSelection(`\n- [x] ${cm.getSelection()}`);
cm.focus();
},
className: 'fa fa-check-square-o',
title: 'Add Checkbox (checked)',
}, '|',
'unordered-list', 'ordered-list', '|',
'link', 'image', 'table', 'horizontal-rule', '|',
'clean-block', '|',
{
name: 'revert-to-textarea',
action(e) {
e.toTextArea();
},
className: 'fa fa-file',
title: 'Revert to simple textarea',
},
], ...easyMDEOptions});
const inputField = easyMDE.codemirror.getInputField();
inputField.classList.add('js-quick-submit');
easyMDE.codemirror.setOption('extraKeys', {
Enter: () => {
const tributeContainer = document.querySelector('.tribute-container');
if (!tributeContainer || tributeContainer.style.display === 'none') {
return window.CodeMirror.Pass;
}
},
Backspace: (cm) => {
if (cm.getInputField().trigger) {
cm.getInputField().trigger('input');
}
cm.execCommand('delCharBefore');
},
});
attachTribute(inputField, {mentions: true, emoji: true});
attachEasyMDEToElements(easyMDE);
return easyMDE;
}
/**
* attach the EasyMDE object to its input elements (InputField, TextArea)
* @param {EasyMDE} easyMDE
*/
export function attachEasyMDEToElements(easyMDE) {
// TODO: that's the only way we can do now to attach the EasyMDE object to a HTMLElement
// InputField is used by CodeMirror to accept user input
const inputField = easyMDE.codemirror.getInputField();
inputField._data_easyMDE = easyMDE;
// TextArea is the real textarea element in the form
const textArea = easyMDE.codemirror.getTextArea();
textArea._data_easyMDE = easyMDE;
}
/**
* get the attached EasyMDE editor created by createCommentEasyMDE
* @param el jQuery or HTMLElement
* @returns {null|EasyMDE}
*/
export function getAttachedEasyMDE(el) {
if (el instanceof $) {
el = el[0];
}
if (!el) {
return null;
}
return el._data_easyMDE;
}
/**
* validate if the given EasyMDE textarea is is non-empty.
* @param {jQuery} $textarea
* @returns {boolean} returns true if validation succeeded.
*/
export function validateTextareaNonEmpty($textarea) {
const $mdeInputField = $(getAttachedEasyMDE($textarea).codemirror.getInputField());
// The original edit area HTML element is hidden and replaced by the
// SimpleMDE/EasyMDE editor, breaking HTML5 input validation if the text area is empty.
// This is a workaround for this upstream bug.
// See https://github.com/sparksuite/simplemde-markdown-editor/issues/324
if (!$textarea.val()) {
$mdeInputField.prop('required', true);
const $form = $textarea.parents('form');
if (!$form.length) {
// this should never happen. we put a alert here in case the textarea would be forgotten to be put in a form
alert('Require non-empty content');
} else {
$form[0].reportValidity();
}
return false;
}
$mdeInputField.prop('required', false);
return true;
}
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