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

85.83% Statements 103/120
55.56% Branches 30/54
80.65% Functions 25/31
85.83% Lines 103/120

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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);
          Eif (dom.isLi(head)) {
            const previousList = this.findList(head.previousSibling);
            Iif (previousList) {
              paras
                .map(para => previousList.appendChild(para));
            } else {
              this.wrapList(paras, head.parentNode.nodeName);
              paras
                .map((para) => para.parentNode)
                .map((para) => this.appendToPrevious(para));
            }
          } 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);
          Eif (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 parentItem = headList.parentNode;

          if (headList.parentNode.nodeName === 'LI') {
            paras.map(para => {
              const newList = this.findNextSiblings(para);

              Iif (parentItem.nextSibling) {
                parentItem.parentNode.insertBefore(
                  para,
                  parentItem.nextSibling
                );
              } else {
                parentItem.parentNode.appendChild(para);
              }

              Iif (newList.length) {
                this.wrapList(newList, headList.nodeName);
                para.appendChild(newList[0].parentNode);
              }
            });

            Eif (headList.children.length === 0) {
              parentItem.removeChild(headList);
            }

            Eif (parentItem.childNodes.length === 0) {
              parentItem.parentNode.removeChild(parentItem);
            }
          } else {
            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
            Eif (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;
      }

      /**
       * @method appendToPrevious
       *
       * Appends list to previous list item, if
       * none exist it wraps the list in a new list item.
       *
       * @param {HTMLNode} ListItem
       * @return {HTMLNode}
       */
      appendToPrevious(node) {
        return node.previousSibling
          ? dom.appendChildNodes(node.previousSibling, [node])
          : this.wrapList([node], 'LI');
      }

      /**
       * @method findList
       *
       * Finds an existing list in list item
       *
       * @param {HTMLNode} ListItem
       * @return {Array[]}
       */
      findList(node) {
        return node
          ? lists.find(node.children, child => ['OL', 'UL'].indexOf(child.nodeName) > -1)
          : null;
      }

      /**
       * @method findNextSiblings
       *
       * Finds all list item siblings that follow it
       *
       * @param {HTMLNode} ListItem
       * @return {HTMLNode}
       */
      findNextSiblings(node) {
        const siblings = [];
        while (node.nextSibling) {
          siblings.push(node.nextSibling);
          node = node.nextSibling;
        }
        return siblings;
      }
    }