# all files / src/js/base/module/ Editor.js

73.25% Statements 293/400
47.49% Branches 85/179
66.67% Functions 56/84
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     import $ from 'jquery';
    import env from '../core/env';
    import key from '../core/key';
    import func from '../core/func';
    import lists from '../core/lists';
    import dom from '../core/dom';
    import range from '../core/range';
    import { readFileAsDataURL, createImage } from '../core/async';
    import History from '../editing/History';
    import Style from '../editing/Style';
    import Typing from '../editing/Typing';
    import Table from '../editing/Table';
    import Bullet from '../editing/Bullet';

    const KEY_BOGUS = 'bogus';

    /**
     * @class Editor
     */
    export default class Editor {
      constructor(context) {
        this.context = context;

        this.$note = context.layoutInfo.note;
        this.$editor = context.layoutInfo.editor;
        this.$editable = context.layoutInfo.editable;
        this.options = context.options;
        this.lang = this.options.langInfo;

        this.editable = this.$editable[0];
        this.lastRange = null;

        this.style = new Style();
        this.table = new Table();
        this.typing = new Typing(context);
        this.bullet = new Bullet();
        this.history = new History(this.$editable);

        this.context.memo('help.undo', this.lang.help.undo);
        this.context.memo('help.redo', this.lang.help.redo);
        this.context.memo('help.tab', this.lang.help.tab);
        this.context.memo('help.untab', this.lang.help.untab);
        this.context.memo('help.insertParagraph', this.lang.help.insertParagraph);
        this.context.memo('help.insertOrderedList', this.lang.help.insertOrderedList);
        this.context.memo('help.insertUnorderedList', this.lang.help.insertUnorderedList);
        this.context.memo('help.indent', this.lang.help.indent);
        this.context.memo('help.outdent', this.lang.help.outdent);
        this.context.memo('help.formatPara', this.lang.help.formatPara);
        this.context.memo('help.insertHorizontalRule', this.lang.help.insertHorizontalRule);
        this.context.memo('help.fontName', this.lang.help.fontName);

        // native commands(with execCommand), generate function for execCommand
        const commands = [
          'bold', 'italic', 'underline', 'strikethrough', 'superscript', 'subscript',
          'justifyLeft', 'justifyCenter', 'justifyRight', 'justifyFull',
          'formatBlock', 'removeFormat', 'backColor'
        ];

        for (let idx = 0, len = commands.length; idx < len; idx++) {
          this[commands[idx]] = ((sCmd) => {
            return (value) => {
              this.beforeCommand();
              document.execCommand(sCmd, false, value);
              this.afterCommand(true);
            };
          })(commands[idx]);
          this.context.memo('help.' + commands[idx], this.lang.help[commands[idx]]);
        }

        this.fontName = this.wrapCommand((value) => {
          return this.fontStyling('font-family', "\'" + value + "\'");
        });

        this.fontSize = this.wrapCommand((value) => {
          return this.fontStyling('font-size', value + 'px');
        });

        for (let idx = 1; idx <= 6; idx++) {
          this['formatH' + idx] = ((idx) => {
            return () => {
              this.formatBlock('H' + idx);
            };
          })(idx);
          this.context.memo('help.formatH' + idx, this.lang.help['formatH' + idx]);
        };

        this.insertParagraph = this.wrapCommand(() => {
          this.typing.insertParagraph(this.editable);
        });

        this.insertOrderedList = this.wrapCommand(() => {
          this.bullet.insertOrderedList(this.editable);
        });

        this.insertUnorderedList = this.wrapCommand(() => {
          this.bullet.insertUnorderedList(this.editable);
        });

        this.indent = this.wrapCommand(() => {
          this.bullet.indent(this.editable);
        });

        this.outdent = this.wrapCommand(() => {
          this.bullet.outdent(this.editable);
        });

        /**
         * insertNode
         * insert node
         * @param {Node} node
         */
        this.insertNode = this.wrapCommand((node) => {
          if (this.isLimited($(node).text().length)) {
            return;
          }
          const rng = this.createRange();
          rng.insertNode(node);
          range.createFromNodeAfter(node).select();
        });

        /**
         * insert text
         * @param {String} text
         */
        this.insertText = this.wrapCommand((text) => {
          if (this.isLimited(text.length)) {
            return;
          }
          const rng = this.createRange();
          const textNode = rng.insertNode(dom.createText(text));
          range.create(textNode, dom.nodeLength(textNode)).select();
        });
        /**
         * paste HTML
         * @param {String} markup
         */
        this.pasteHTML = this.wrapCommand((markup) => {
          if (this.isLimited(markup.length)) {
            return;
          }
          const contents = this.createRange().pasteHTML(markup);
          range.createFromNodeAfter(lists.last(contents)).select();
        });

        /**
         * formatBlock
         *
         * @param {String} tagName
         */
        this.formatBlock = this.wrapCommand((tagName, $target) => {
          const onApplyCustomStyle = this.options.callbacks.onApplyCustomStyle;
          Iif (onApplyCustomStyle) {
            onApplyCustomStyle.call(this, $target, this.context, this.onFormatBlock);
          } else {
            this.onFormatBlock(tagName, $target);
          }
        });

        /**
         * insert horizontal rule
         */
        this.insertHorizontalRule = this.wrapCommand(() => {
          const hrNode = this.createRange().insertNode(dom.create('HR'));
          Eif (hrNode.nextSibling) {
            range.create(hrNode.nextSibling, 0).normalize().select();
          }
        });

        /**
         * lineHeight
         * @param {String} value
         */
        this.lineHeight = this.wrapCommand((value) => {
          this.style.stylePara(this.createRange(), {
            lineHeight: value
          });
        });

        /**
         * create link (command)
         *
         * @param {Object} linkInfo
         */
        this.createLink = this.wrapCommand((linkInfo) => {
          let linkUrl = linkInfo.url;
          const linkText = linkInfo.text;
          const isNewWindow = linkInfo.isNewWindow;
          let rng = linkInfo.range || this.createRange();
          const additionalTextLength = linkText.length - rng.toString().length;
          if (additionalTextLength > 0 && this.isLimited(additionalTextLength)) {
            return;
          }
          const isTextChanged = rng.toString() !== linkText;

          // handle spaced urls from input
          Eif (typeof linkUrl === 'string') {
            linkUrl = linkUrl.trim();
          }

          Iif (this.options.onCreateLink) {
            linkUrl = this.options.onCreateLink(linkUrl);
          } else {
            // if url is not relative,
            if (!/^\.?\/(.*)/.test(linkUrl)) {
              // if url doesn't match an URL schema, set http:// as default
              linkUrl = /^[A-Za-z][A-Za-z0-9+-.]*\:[\/\/]?/.test(linkUrl)
                ? linkUrl : 'http://' + linkUrl;
            }
          }

          let anchors = [];
          Eif (isTextChanged) {
            rng = rng.deleteContents();
            const anchor = rng.insertNode($('<A>' + linkText + '</A>')[0]);
            anchors.push(anchor);
          } else {
            anchors = this.style.styleNodes(rng, {
              nodeName: 'A',
              expandClosestSibling: true,
              onlyPartialContains: true
            });
          }

          $.each(anchors, (idx, anchor) => {
            $(anchor).attr('href', linkUrl);
            if (isNewWindow) {
              $(anchor).attr('target', '_blank');
            } else {
              $(anchor).removeAttr('target');
            }
          });

          const startRange = range.createFromNodeBefore(lists.head(anchors));
          const startPoint = startRange.getStartPoint();
          const endRange = range.createFromNodeAfter(lists.last(anchors));
          const endPoint = endRange.getEndPoint();

          range.create(
            startPoint.node,
            startPoint.offset,
            endPoint.node,
            endPoint.offset
          ).select();
        });

        /**
         * setting color
         *
         * @param {Object} sObjColor  color code
         * @param {String} sObjColor.foreColor foreground color
         * @param {String} sObjColor.backColor background color
         */
        this.color = this.wrapCommand((colorInfo) => {
          const foreColor = colorInfo.foreColor;
          const backColor = colorInfo.backColor;

          Iif (foreColor) { document.execCommand('foreColor', false, foreColor); }
          Eif (backColor) { document.execCommand('backColor', false, backColor); }
        });

        /**
         * Set foreground color
         *
         * @param {String} colorCode foreground color code
         */
        this.foreColor = this.wrapCommand((colorInfo) => {
          document.execCommand('styleWithCSS', false, true);
          document.execCommand('foreColor', false, colorInfo);
        });

        /**
         * insert Table
         *
         * @param {String} dimension of table (ex : "5x5")
         */
        this.insertTable = this.wrapCommand((dim) => {
          const dimension = dim.split('x');

          const rng = this.createRange().deleteContents();
          rng.insertNode(this.table.createTable(dimension[0], dimension[1], this.options));
        });

        /**
         * remove media object and Figure Elements if media object is img with Figure.
         */
        this.removeMedia = this.wrapCommand(() => {
          let $target = $(this.restoreTarget()).parent();
          if ($target.parent('figure').length) {
            $target.parent('figure').remove();
          } else {
            $target = $(this.restoreTarget()).detach();
          }
          this.context.triggerEvent('media.delete', $target, this.$editable);
        });

        /**
         * float me
         *
         * @param {String} value
         */
        this.floatMe = this.wrapCommand((value) => {
          const $target = $(this.restoreTarget());
          $target.toggleClass('note-float-left', value === 'left');
          $target.toggleClass('note-float-right', value === 'right');
          $target.css('float', value);
        });

        /**
         * resize overlay element
         * @param {String} value
         */
        this.resize = this.wrapCommand((value) => {
          const $target = $(this.restoreTarget());
          $target.css({
            width: value * 100 + '%',
            height: ''
          });
        });
      }

      initialize() {
        // bind custom events
        this.$editable.on('keydown', (event) => {
          Iif (event.keyCode === key.code.ENTER) {
            this.context.triggerEvent('enter', event);
          }
          this.context.triggerEvent('keydown', event);

          Eif (!event.isDefaultPrevented()) {
            Eif (this.options.shortcuts) {
              this.handleKeyMap(event);
            } else {
              this.preventDefaultEditableShortCuts(event);
            }
          }
          Iif (this.isLimited(1, event)) {
            return false;
          }
        }).on('keyup', (event) => {
          this.context.triggerEvent('keyup', event);
        }).on('focus', (event) => {
          this.context.triggerEvent('focus', event);
        }).on('blur', (event) => {
          this.context.triggerEvent('blur', event);
        }).on('mousedown', (event) => {
          this.context.triggerEvent('mousedown', event);
        }).on('mouseup', (event) => {
          this.context.triggerEvent('mouseup', event);
        }).on('scroll', (event) => {
          this.context.triggerEvent('scroll', event);
        }).on('paste', (event) => {
          this.context.triggerEvent('paste', event);
        });

        // init content before set event
        this.$editable.html(dom.html(this.$note) || dom.emptyPara);

        this.$editable.on(env.inputEventName, func.debounce(() => {
          this.context.triggerEvent('change', this.$editable.html());
        }, 10));

        this.$editor.on('focusin', (event) => {
          this.context.triggerEvent('focusin', event);
        }).on('focusout', (event) => {
          this.context.triggerEvent('focusout', event);
        });

        Eif (!this.options.airMode) {
          Iif (this.options.width) {
            this.$editor.outerWidth(this.options.width);
          }
          Iif (this.options.height) {
            this.$editable.outerHeight(this.options.height);
          }
          Iif (this.options.maxHeight) {
            this.$editable.css('max-height', this.options.maxHeight);
          }
          Iif (this.options.minHeight) {
            this.$editable.css('min-height', this.options.minHeight);
          }
        }

        this.history.recordUndo();
      }

      destroy() {
        this.$editable.off();
      }

      handleKeyMap(event) {
        const keyMap = this.options.keyMap[env.isMac ? 'mac' : 'pc'];
        const keys = [];

        Iif (event.metaKey) { keys.push('CMD'); }
        Iif (event.ctrlKey && !event.altKey) { keys.push('CTRL'); }
        Iif (event.shiftKey) { keys.push('SHIFT'); }

        const keyName = key.nameFromCode[event.keyCode];
        Iif (keyName) {
          keys.push(keyName);
        }

        const eventName = keyMap[keys.join('+')];
        Iif (eventName) {
          if (this.context.invoke(eventName) !== false) {
            event.preventDefault();
          }
        } else Iif (key.isEdit(event.keyCode)) {
          this.afterCommand();
        }
      }

      preventDefaultEditableShortCuts(event) {
        // B(Bold, 66) / I(Italic, 73) / U(Underline, 85)
        if ((event.ctrlKey || event.metaKey) &&
          lists.contains([66, 73, 85], event.keyCode)) {
          event.preventDefault();
        }
      }

      isLimited(pad, event) {
        pad = pad || 0;

        if (typeof event !== 'undefined') {
          Iif (key.isMove(event.keyCode) ||
              (event.ctrlKey || event.metaKey) ||
              lists.contains([key.code.BACKSPACE, key.code.DELETE], event.keyCode)) {
            return false;
          }
        }

        if (this.options.maxTextLength > 0) {
          Eif ((this.$editable.text().length + pad) >= this.options.maxTextLength) {
            return true;
          }
        }
        return false;
      }
      /**
       * create range
       * @return {WrappedRange}
       */
      createRange() {
        this.focus();
        return range.create(this.editable);
      }

      /**
       * saveRange
       *
       * save current range
       *
       * @param {Boolean} [thenCollapse=false]
       */
      saveRange(thenCollapse) {
        this.lastRange = this.createRange();
        Iif (thenCollapse) {
          this.lastRange.collapse().select();
        }
      }

      /**
       * restoreRange
       *
       * restore lately range
       */
      restoreRange() {
        if (this.lastRange) {
          this.lastRange.select();
          this.focus();
        }
      }

      saveTarget(node) {
        this.$editable.data('target', node);
      }

      clearTarget() {
        this.$editable.removeData('target');
      }

      restoreTarget() {
        return this.$editable.data('target');
      }

      /**
       * currentStyle
       *
       * current style
       * @return {Object|Boolean} unfocus
       */
      currentStyle() {
        let rng = range.create();
        if (rng) {
          rng = rng.normalize();
        }
        return rng ? this.style.current(rng) : this.style.fromNode(this.$editable);
      }

      /**
       * style from node
       *
       * @param {jQuery} $node
       * @return {Object}
       */
      styleFromNode($node) {
        return this.style.fromNode($node);
      }

      /**
       * undo
       */
      undo() {
        this.context.triggerEvent('before.command', this.$editable.html());
        this.history.undo();
        this.context.triggerEvent('change', this.$editable.html());
      }

      /*
      * commit
      */
      commit() {
        this.context.triggerEvent('before.command', this.$editable.html());
        this.history.commit();
        this.context.triggerEvent('change', this.$editable.html());
      }

      /**
       * redo
       */
      redo() {
        this.context.triggerEvent('before.command', this.$editable.html());
        this.history.redo();
        this.context.triggerEvent('change', this.$editable.html());
      }

      /**
       * before command
       */
      beforeCommand() {
        this.context.triggerEvent('before.command', this.$editable.html());
        // keep focus on editable before command execution
        this.focus();
      }

      /**
       * after command
       * @param {Boolean} isPreventTrigger
       */
      afterCommand(isPreventTrigger) {
        this.normalizeContent();
        this.history.recordUndo();
        if (!isPreventTrigger) {
          this.context.triggerEvent('change', this.$editable.html());
        }
      }

      /**
       * handle tab key
       */
      tab() {
        const rng = this.createRange();
        Iif (rng.isCollapsed() && rng.isOnCell()) {
          this.table.tab(rng);
        } else {
          Iif (this.options.tabSize === 0) {
            return false;
          }

          Eif (!this.isLimited(this.options.tabSize)) {
            this.beforeCommand();
            this.typing.insertTab(rng, this.options.tabSize);
            this.afterCommand();
          }
        }
      }

      /**
       * handle shift+tab key
       */
      untab() {
        const rng = this.createRange();
        if (rng.isCollapsed() && rng.isOnCell()) {
          this.table.tab(rng, true);
        } else {
          if (this.options.tabSize === 0) {
            return false;
          }
        }
      }

      /**
       * run given function between beforeCommand and afterCommand
       */
      wrapCommand(fn) {
        return function() {
          this.beforeCommand();
          fn.apply(this, arguments);
          this.afterCommand();
        };
      }

      /**
       * insert image
       *
       * @param {String} src
       * @param {String|Function} param
       * @return {Promise}
       */
      insertImage(src, param) {
        return createImage(src, param).then(($image) => {
          this.beforeCommand();

          Iif (typeof param === 'function') {
            param($image);
          } else {
            Eif (typeof param === 'string') {
              $image.attr('data-filename', param);
            }
            $image.css('width', Math.min(this.$editable.width(), $image.width()));
          }

          $image.show();
          range.create(this.editable).insertNode($image[0]);
          range.createFromNodeAfter($image[0]).select();
          this.afterCommand();
        }).fail((e) => {
          this.context.triggerEvent('image.upload.error', e);
        });
      }

      /**
       * insertImages
       * @param {File[]} files
       */
      insertImagesAsDataURL(files) {
        $.each(files, (idx, file) => {
          const filename = file.name;
          if (this.options.maximumImageFileSize && this.options.maximumImageFileSize < file.size) {
            this.context.triggerEvent('image.upload.error', this.lang.image.maximumFileSizeError);
          } else {
            readFileAsDataURL(file).then((dataURL) => {
              return this.insertImage(dataURL, filename);
            }).fail(() => {
              this.context.triggerEvent('image.upload.error');
            });
          }
        });
      }

      /**
       * return selected plain text
       * @return {String} text
       */
      getSelectedText() {
        let rng = this.createRange();

        // if range on anchor, expand range with anchor
        if (rng.isOnAnchor()) {
          rng = range.createFromNode(dom.ancestor(rng.sc, dom.isAnchor));
        }

        return rng.toString();
      }

      onFormatBlock(tagName, $target) {
        // [workaround] for MSIE, IE need `<`
        tagName = env.isMSIE ? '<' + tagName + '>' : tagName;
        document.execCommand('FormatBlock', false, tagName);

        // support custom class
        if ($target && $target.length) {
          const className = $target[0].className || '';
          Eif (className) {
            const currentRange = this.createRange();

            const $parent = $([currentRange.sc, currentRange.ec]).closest(tagName);
            $parent.addClass(className);
          }
        }
      }

      formatPara() {
        this.formatBlock('P');
      }

      fontStyling(target, value) {
        const rng = this.createRange();

        Eif (rng) {
          const spans = this.style.styleNodes(rng);
          $(spans).css(target, value);

          // [workaround] added styled bogus span for style
          //  - also bogus character needed for cursor position
          Eif (rng.isCollapsed()) {
            const firstSpan = lists.head(spans);
            Eif (firstSpan && !dom.nodeLength(firstSpan)) {
              firstSpan.innerHTML = dom.ZERO_WIDTH_NBSP_CHAR;
              range.createFromNodeAfter(firstSpan.firstChild).select();
              this.$editable.data(KEY_BOGUS, firstSpan);
            }
          }
        }
      }

      /**
       * unlink
       *
       * @type command
       */
      unlink() {
        let rng = this.createRange();
        if (rng.isOnAnchor()) {
          const anchor = dom.ancestor(rng.sc, dom.isAnchor);
          rng = range.createFromNode(anchor);
          rng.select();

          this.beforeCommand();
          document.execCommand('unlink');
          this.afterCommand();
        }
      }

      /**
       * returns link info
       *
       * @return {Object}
       * @return {WrappedRange} return.range
       * @return {String} return.text
       * @return {Boolean} [return.isNewWindow=true]
       * @return {String} [return.url=""]
       */
      getLinkInfo() {
        const rng = this.createRange().expand(dom.isAnchor);

        // Get the first anchor on range(for edit).
        const $anchor = $(lists.head(rng.nodes(dom.isAnchor)));
        const linkInfo = {
          range: rng,
          text: rng.toString(),
          url: $anchor.length ? $anchor.attr('href') : ''
        };

        // When anchor exists,
        Eif ($anchor.length) {
          // Set isNewWindow by checking its target.
          linkInfo.isNewWindow = $anchor.attr('target') === '_blank';
        }

        return linkInfo;
      }

      addRow(position) {
        const rng = this.createRange(this.$editable);
        if (rng.isCollapsed() && rng.isOnCell()) {
          this.beforeCommand();
          this.table.addRow(rng, position);
          this.afterCommand();
        }
      }

      addCol(position) {
        const rng = this.createRange(this.$editable);
        if (rng.isCollapsed() && rng.isOnCell()) {
          this.beforeCommand();
          this.table.addCol(rng, position);
          this.afterCommand();
        }
      }

      deleteRow() {
        const rng = this.createRange(this.$editable);
        if (rng.isCollapsed() && rng.isOnCell()) {
          this.beforeCommand();
          this.table.deleteRow(rng);
          this.afterCommand();
        }
      }

      deleteCol() {
        const rng = this.createRange(this.$editable);
        if (rng.isCollapsed() && rng.isOnCell()) {
          this.beforeCommand();
          this.table.deleteCol(rng);
          this.afterCommand();
        }
      }

      deleteTable() {
        const rng = this.createRange(this.$editable);
        if (rng.isCollapsed() && rng.isOnCell()) {
          this.beforeCommand();
          this.table.deleteTable(rng);
          this.afterCommand();
        }
      }

      /**
       * @param {Position} pos
       * @param {jQuery} $target - target element
       * @param {Boolean} [bKeepRatio] - keep ratio
       */
      resizeTo(pos, $target, bKeepRatio) {
        let imageSize;
        if (bKeepRatio) {
          const newRatio = pos.y / pos.x;
          const ratio = $target.data('ratio');
          imageSize = {
            width: ratio > newRatio ? pos.x : pos.y / ratio,
            height: ratio > newRatio ? pos.x * ratio : pos.y
          };
        } else {
          imageSize = {
            width: pos.x,
            height: pos.y
          };
        }

        $target.css(imageSize);
      }

      /**
       * returns whether editable area has focus or not.
       */
      hasFocus() {
        return this.$editable.is(':focus');
      }

      /**
       * set focus
       */
      focus() {
        // [workaround] Screen will move when page is scolled in IE.
        //  - do focus when not focused
        Eif (!this.hasFocus()) {
          this.$editable.focus();
        }
      }

      /**
       * returns whether contents is empty or not.
       * @return {Boolean}
       */
      isEmpty() {
        return dom.isEmpty(this.$editable[0]) || dom.emptyPara === this.$editable.html();
      }

      /**
       * Removes all contents and restores the editable instance to an _emptyPara_.
       */
      empty() {
        this.context.invoke('code', dom.emptyPara);
      }

      /**
       * normalize content
       */
      normalizeContent() {
        this.$editable[0].normalize();
      }
    }