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✏️ Editing: editor-para.js

YUI.add('editor-para', function (Y, NAME) {

/**
     * Plugin for Editor to paragraph auto wrapping and correction.
     * @class Plugin.EditorPara
     * @extends Plugin.EditorParaBase
     * @constructor
     * @module editor
     * @submodule editor-para
     */

var EditorPara = function() {
        EditorPara.superclass.constructor.apply(this, arguments);
    }, HOST = 'host', NODE_CHANGE = 'nodeChange', PARENT_NODE = 'parentNode',
    FIRST_P = '> p', P = 'p', BR = '<br>', FC = 'firstChild', LI = 'li';

Y.extend(EditorPara, Y.Plugin.EditorParaBase, {
        /**
        * Resolves the ROOT editor element.
        * @method _getRoot
        * @private
        */
        _getRoot: function() {
            return this.get(HOST).getInstance().EditorSelection.ROOT;
        },

/**
        * nodeChange handler to handle fixing an empty document.
        * @private
        * @method _onNodeChange
        */
        _onNodeChange: function(e) {
            var host = this.get(HOST), inst = host.getInstance(),
                html, txt, par , d, sel, btag = inst.EditorSelection.DEFAULT_BLOCK_TAG,
                inHTML, txt2, childs, aNode, node2, top, n, sib, para2, prev,
                ps, br, item, p, imgs, t, LAST_CHILD = ':last-child', para, b, dir,
                lc, lc2, found = false, root = this._getRoot(), start;

switch (e.changedType) {
                case 'enter-up':
                    para = ((this._lastPara) ? this._lastPara : e.changedNode);
                    b = para.one('br.yui-cursor');

if (this._lastPara) {
                        delete this._lastPara;
                    }

if (b) {
                        if (b.previous() || b.next()) {
                            if (b.ancestor(P)) {
                                b.remove();
                            }
                        }
                    }
                    if (!para.test(btag)) {
                        para2 = para.ancestor(btag);
                        if (para2) {
                            para = para2;
                            para2 = null;
                        }
                    }
                    if (para.test(btag)) {
                        prev = para.previous();
                        if (prev) {
                            lc = prev.one(LAST_CHILD);
                            while (!found) {
                                if (lc) {
                                    lc2 = lc.one(LAST_CHILD);
                                    if (lc2) {
                                        lc = lc2;
                                    } else {
                                        found = true;
                                    }
                                } else {
                                    found = true;
                                }
                            }
                            if (lc) {
                                host.copyStyles(lc, para);
                            }
                        }
                    }
                    break;
                case 'enter':
                    if (Y.UA.webkit) {
                        //Webkit doesn't support shift+enter as a BR, this fixes that.
                        if (e.changedEvent.shiftKey) {
                            host.execCommand('insertbr');
                            e.changedEvent.preventDefault();
                        }
                    }
                    if (e.changedNode.test('li') && !Y.UA.ie) {
                        html = inst.EditorSelection.getText(e.changedNode);
                        if (html === '') {
                            par = e.changedNode.ancestor('ol,ul');
                            dir = par.getAttribute('dir');
                            if (dir !== '') {
                                dir = ' dir = "' + dir + '"';
                            }
                            par = e.changedNode.ancestor(inst.EditorSelection.BLOCKS);
                            d = inst.Node.create('<p' + dir + '>' + inst.EditorSelection.CURSOR + '</p>');
                            par.insert(d, 'after');
                            e.changedNode.remove();
                            e.changedEvent.halt();

sel = new inst.EditorSelection();
                            sel.selectNode(d, true, false);
                        }
                    }
                    //TODO Move this to a GECKO MODULE - Can't for the moment, requires no change to metadata (YMAIL)
                    if (Y.UA.gecko && host.get('defaultblock') !== 'p') {
                        par = e.changedNode;

if (!par.test(LI) && !par.ancestor(LI)) {
                            if (!par.test(btag)) {
                                par = par.ancestor(btag);
                            }
                            d = inst.Node.create('<' + btag + '></' + btag + '>');
                            par.insert(d, 'after');
                            sel = new inst.EditorSelection();
                            if (sel.anchorOffset) {
                                inHTML = sel.anchorNode.get('textContent');

txt = inst.one(inst.config.doc.createTextNode(inHTML.substr(0, sel.anchorOffset)));
                                txt2 = inst.one(inst.config.doc.createTextNode(inHTML.substr(sel.anchorOffset)));

aNode = sel.anchorNode;
                                aNode.setContent(''); //I
                                node2 = aNode.cloneNode(); //I
                                node2.append(txt2); //text
                                top = false;
                                sib = aNode; //I
                                while (!top) {
                                    sib = sib.get(PARENT_NODE); //B
                                    if (sib && !sib.test(btag)) {
                                        n = sib.cloneNode();
                                        n.set('innerHTML', '');
                                        n.append(node2);

//Get children..
                                        childs = sib.get('childNodes');
                                        start = false;
                                        /*jshint loopfunc: true */
                                        childs.each(function(c) {
                                            if (start) {
                                                n.append(c);
                                            }
                                            if (c === aNode) {
                                                start = true;
                                            }
                                        });

aNode = sib; //Top sibling
                                        node2 = n;
                                    } else {
                                        top = true;
                                    }
                                }
                                txt2 = node2;
                                sel.anchorNode.append(txt);

if (txt2) {
                                    d.append(txt2);
                                }
                            }
                            if (d.get(FC)) {
                                d = d.get(FC);
                            }
                            d.prepend(inst.EditorSelection.CURSOR);
                            sel.focusCursor(true, true);
                            html = inst.EditorSelection.getText(d);
                            if (html !== '') {
                                inst.EditorSelection.cleanCursor();
                            }
                            e.changedEvent.preventDefault();
                        }
                    }
                    break;
                case 'keyup':
                    if (Y.UA.gecko) {
                        if (root && root.getHTML().length < 20) {
                            if (!root.one(FIRST_P)) {
                                this._fixFirstPara();
                            }
                        }
                    }
                    break;
                case 'backspace-up':
                case 'backspace-down':
                case 'delete-up':
                    if (!Y.UA.ie) {
                        ps = root.all(FIRST_P);
                        item = root;
                        if (ps.item(0)) {
                            item = ps.item(0);
                        }
                        br = item.one('br');
                        if (br) {
                            br.removeAttribute('id');
                            br.removeAttribute('class');
                        }

txt = inst.EditorSelection.getText(item);
                        txt = txt.replace(/ /g, '').replace(/\n/g, '');
                        imgs = item.all('img');

if (txt.length === 0 && !imgs.size()) {
                            //God this is horrible..
                            if (!item.test(P)) {
                                this._fixFirstPara();
                            }
                            p = null;
                            if (e.changedNode && e.changedNode.test(P)) {
                                p = e.changedNode;
                            }
                            if (!p && host._lastPara && host._lastPara.inDoc()) {
                                p = host._lastPara;
                            }
                            if (p && !p.test(P)) {
                                p = p.ancestor(P);
                            }
                            if (p) {
                                if (!p.previous() && p.get(PARENT_NODE) && p.get(PARENT_NODE).compareTo(root)) {
                                    e.changedEvent.frameEvent.halt();
                                    e.preventDefault();
                                }
                            }
                        }
                        if (Y.UA.webkit) {
                            if (e.changedNode) {
                                //All backspace calls in Webkit need a preventDefault to
                                //stop history navigation #2531299
                                e.preventDefault();
                                item = e.changedNode;
                                if (item.test('li') && (!item.previous() && !item.next())) {
                                    html = item.get('innerHTML').replace(BR, '');
                                    if (html === '') {
                                        if (item.get(PARENT_NODE)) {
                                            item.get(PARENT_NODE).replace(inst.Node.create(BR));
                                            e.changedEvent.frameEvent.halt();
                                            inst.EditorSelection.filterBlocks();
                                        }
                                    }
                                }
                            }
                        }
                    }

if (Y.UA.gecko) {
                       /*
                        * This forced FF to redraw the content on backspace.
                        * On some occasions FF will leave a cursor residue after content has been deleted.
                        * Dropping in the empty textnode and then removing it causes FF to redraw and
                        * remove the "ghost cursors"
                        */
                        // d = e.changedNode;
                        // t = inst.config.doc.createTextNode(' ');
                        // d.appendChild(t);
                        // d.removeChild(t);

this._fixGeckoOnBackspace(inst);
                    }
                    break;
            }
            if (Y.UA.gecko) {
                if (e.changedNode && !e.changedNode.test(btag)) {
                    p = e.changedNode.ancestor(btag);
                    if (p) {
                        this._lastPara = p;
                    }
                }
            }

//If we just backspaced into a P on FF, we have to put the cursor
        //before the BR that FF (usually) had injected when we used <ENTER> to
        //leave the P.
        _fixGeckoOnBackspace: function (inst) {
            var sel = new inst.EditorSelection(),
                node,
                childNodes;

//not a cursor, not in a paragraph, or anchored at paragraph start.
            if (!sel.isCollapsed || sel.anchorNode.get('nodeName') !== 'P' ||
                sel.anchorOffset === 0) {
                return;
            }

//cursor not on the injected final BR
            childNodes = sel.anchorNode.get('childNodes');
            node = sel.anchorNode.get('lastChild');
            if (sel.anchorOffset !== childNodes.size() || node.get('nodeName') !== 'BR') {
                return;
            }

//empty P (only contains BR)
            if (sel.anchorOffset === 1) {
                sel.selectNode(sel.anchorNode, true);
                return;
            }

//We only expect injected BR behavior when last Node is text
            node = node.get('previousSibling');
            if (node.get('nodeType') !== Node.TEXT_NODE) {
                return;
            }

offset = node.get('length');

// the cursor's position is strictly
            // at the offset when this bug occurs
            if (sel.getEditorOffset() === offset) {
                sel.selectNode(node, true, offset);
            }
        },

initializer: function() {
            var host = this.get(HOST);
            if (host.editorBR) {
                Y.error('Can not plug EditorPara and EditorBR at the same time.');
                return;
            }

host.on(NODE_CHANGE, Y.bind(this._onNodeChange, this));
        }
    }, {
        /**
        * editorPara
        * @static
        * @property NAME
        */
        NAME: 'editorPara',
        /**
        * editorPara
        * @static
        * @property NS
        */
        NS: 'editorPara',
        ATTRS: {
            host: {
                value: false
            }
        }
    });

Y.namespace('Plugin');

Y.Plugin.EditorPara = EditorPara;

}, '3.18.1', {"requires": ["editor-para-base"]});

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