forgejo/web_src/js/features/comp/EasyMDE.js
silverwind 3dbdf36d95
Fix CSS specificity issue with easymde's css (#18201)
* Fix CSS specificity issue with easymde's css

PR #18069 introduced a regression in certain overwritten editor styles
because the dynamic loading of easymde.min.css causes its's style to
apply after our supposed override styles.

Solve this by bundling the styles into index.css. We should later aim to
completely replace easymde.min.css completely with our own styles so there
are no more conflicts.

* Update web_src/js/features/comp/EasyMDE.js

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
2022-01-07 16:41:31 +08:00

186 lines
5.7 KiB
JavaScript

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
* @returns {null|EasyMDE}
*/
export async function createCommentEasyMDE(textarea) {
if (textarea instanceof jQuery) {
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',
},
],
});
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 jQuery) {
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;
}