import $ from 'jquery';
import dom from '../core/dom';
import range from '../core/range';
import Bullet from '../editing/Bullet';
/**
* @class editing.Typing
*
* Typing
*
*/
export default class Typing {
constructor() {
// a Bullet instance to toggle lists off
this.bullet = new Bullet();
}
/**
* insert tab
*
* @param {WrappedRange} rng
* @param {Number} tabsize
*/
insertTab(rng, tabsize) {
const tab = dom.createText(new Array(tabsize + 1).join(dom.NBSP_CHAR));
rng = rng.deleteContents();
rng.insertNode(tab, true);
rng = range.create(tab, tabsize);
rng.select();
}
/**
* insert paragraph
*/
insertParagraph(editable) {
let rng = range.create(editable);
// deleteContents on range.
rng = rng.deleteContents();
// Wrap range if it needs to be wrapped by paragraph
rng = rng.wrapBodyInlineWithPara();
// finding paragraph
const splitRoot = dom.ancestor(rng.sc, dom.isPara);
let nextPara;
// on paragraph: split paragraph
Eif (splitRoot) {
// if it is an empty line with li
Iif (dom.isEmpty(splitRoot) && dom.isLi(splitRoot)) {
// toogle UL/OL and escape
this.bullet.toggleList(splitRoot.parentNode.nodeName);
return;
// if it is an empty line with para on blockquote
} else Iif (dom.isEmpty(splitRoot) && dom.isPara(splitRoot) && dom.isBlockquote(splitRoot.parentNode)) {
// escape blockquote
dom.insertAfter(splitRoot, splitRoot.parentNode);
nextPara = splitRoot;
// if new line has content (not a line break)
} else {
nextPara = dom.splitTree(splitRoot, rng.getStartPoint());
let emptyAnchors = dom.listDescendant(splitRoot, dom.isEmptyAnchor);
emptyAnchors = emptyAnchors.concat(dom.listDescendant(nextPara, dom.isEmptyAnchor));
$.each(emptyAnchors, (idx, anchor) => {
dom.remove(anchor);
});
// replace empty heading, pre or custom-made styleTag with P tag
Iif ((dom.isHeading(nextPara) || dom.isPre(nextPara) || dom.isCustomStyleTag(nextPara)) && dom.isEmpty(nextPara)) {
nextPara = dom.replace(nextPara, 'p');
}
}
// no paragraph: insert empty paragraph
} else {
const next = rng.sc.childNodes[rng.so];
nextPara = $(dom.emptyPara)[0];
if (next) {
rng.sc.insertBefore(nextPara, next);
} else {
rng.sc.appendChild(nextPara);
}
}
range.create(nextPara, 0).normalize().select().scrollIntoView(editable);
}
}
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