# all files / src/js/base/editing/ Bullet.js

97.73% Statements 86/88
78.95% Branches 30/38
100% Functions 23/23
97.73% Lines 86/88

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     import $ from 'jquery';
    import lists from '../core/lists';
    import func from '../core/func';
    import dom from '../core/dom';
    import range from '../core/range';

    export default class Bullet {
      /**
       * toggle ordered list
       */
      insertOrderedList(editable) {
        this.toggleList('OL', editable);
      }

      /**
       * toggle unordered list
       */
      insertUnorderedList(editable) {
        this.toggleList('UL', editable);
      }

      /**
       * indent
       */
      indent(editable) {
        const rng = range.create(editable).wrapBodyInlineWithPara();

        const paras = rng.nodes(dom.isPara, { includeAncestor: true });
        const clustereds = lists.clusterBy(paras, func.peq2('parentNode'));

        $.each(clustereds, (idx, paras) => {
          const head = lists.head(paras);
          if (dom.isLi(head)) {
            this.wrapList(paras, head.parentNode.nodeName);
          } else {
            $.each(paras, (idx, para) => {
              $(para).css('marginLeft', (idx, val) => {
                return (parseInt(val, 10) || 0) + 25;
              });
            });
          }
        });

        rng.select();
      }

      /**
       * outdent
       */
      outdent(editable) {
        const rng = range.create(editable).wrapBodyInlineWithPara();

        const paras = rng.nodes(dom.isPara, { includeAncestor: true });
        const clustereds = lists.clusterBy(paras, func.peq2('parentNode'));

        $.each(clustereds, (idx, paras) => {
          const head = lists.head(paras);
          if (dom.isLi(head)) {
            this.releaseList([paras]);
          } else {
            $.each(paras, (idx, para) => {
              $(para).css('marginLeft', (idx, val) => {
                val = (parseInt(val, 10) || 0);
                return val > 25 ? val - 25 : '';
              });
            });
          }
        });

        rng.select();
      }

      /**
       * toggle list
       *
       * @param {String} listName - OL or UL
       */
      toggleList(listName, editable) {
        const rng = range.create(editable).wrapBodyInlineWithPara();

        let paras = rng.nodes(dom.isPara, { includeAncestor: true });
        const bookmark = rng.paraBookmark(paras);
        const clustereds = lists.clusterBy(paras, func.peq2('parentNode'));

        // paragraph to list
        if (lists.find(paras, dom.isPurePara)) {
          let wrappedParas = [];
          $.each(clustereds, (idx, paras) => {
            wrappedParas = wrappedParas.concat(this.wrapList(paras, listName));
          });
          paras = wrappedParas;
        // list to paragraph or change list style
        } else {
          const diffLists = rng.nodes(dom.isList, {
            includeAncestor: true
          }).filter((listNode) => {
            return !$.nodeName(listNode, listName);
          });

          if (diffLists.length) {
            $.each(diffLists, (idx, listNode) => {
              dom.replace(listNode, listName);
            });
          } else {
            paras = this.releaseList(clustereds, true);
          }
        }

        range.createFromParaBookmark(bookmark, paras).select();
      }

      /**
       * @param {Node[]} paras
       * @param {String} listName
       * @return {Node[]}
       */
      wrapList(paras, listName) {
        const head = lists.head(paras);
        const last = lists.last(paras);

        const prevList = dom.isList(head.previousSibling) && head.previousSibling;
        const nextList = dom.isList(last.nextSibling) && last.nextSibling;

        const listNode = prevList || dom.insertAfter(dom.create(listName || 'UL'), last);

        // P to LI
        paras = paras.map((para) => {
          return dom.isPurePara(para) ? dom.replace(para, 'LI') : para;
        });

        // append to list(<ul>, <ol>)
        dom.appendChildNodes(listNode, paras);

        Iif (nextList) {
          dom.appendChildNodes(listNode, lists.from(nextList.childNodes));
          dom.remove(nextList);
        }

        return paras;
      }

      /**
       * @method releaseList
       *
       * @param {Array[]} clustereds
       * @param {Boolean} isEscapseToBody
       * @return {Node[]}
       */
      releaseList(clustereds, isEscapseToBody) {
        let releasedParas = [];

        $.each(clustereds, (idx, paras) => {
          const head = lists.head(paras);
          const last = lists.last(paras);

          const headList = isEscapseToBody ? dom.lastAncestor(head, dom.isList) : head.parentNode;
          const lastList = headList.childNodes.length > 1 ? dom.splitTree(headList, {
            node: last.parentNode,
            offset: dom.position(last) + 1
          }, {
            isSkipPaddingBlankHTML: true
          }) : null;

          const middleList = dom.splitTree(headList, {
            node: head.parentNode,
            offset: dom.position(head)
          }, {
            isSkipPaddingBlankHTML: true
          });

          paras = isEscapseToBody ? dom.listDescendant(middleList, dom.isLi)
            : lists.from(middleList.childNodes).filter(dom.isLi);

          // LI to P
          if (isEscapseToBody || !dom.isList(headList.parentNode)) {
            paras = paras.map((para) => {
              return dom.replace(para, 'P');
            });
          }

          $.each(lists.from(paras).reverse(), (idx, para) => {
            dom.insertAfter(para, headList);
          });

          // remove empty lists
          const rootLists = lists.compact([headList, middleList, lastList]);
          $.each(rootLists, (idx, rootList) => {
            const listNodes = [rootList].concat(dom.listDescendant(rootList, dom.isList));
            $.each(listNodes.reverse(), (idx, listNode) => {
              Eif (!dom.nodeLength(listNode)) {
                dom.remove(listNode, true);
              }
            });
          });

          releasedParas = releasedParas.concat(paras);
        });

        return releasedParas;
      }
    }