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Viewing file:     DraftEditorBlockNode.react.js (12.77 KB)      -rw-r--r--

/**
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @format
 * 
 * @emails oncall+draft_js
 *
 * This file is a fork of DraftEditorBlock.react.js and DraftEditorContents.react.js
 *
 * This is unstable and not part of the public API and should not be used by
 * production systems. This file may be update/removed without notice.
 */
'use strict';

var _assign = require("object-assign");

function _extends() { _extends = _assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; }; return _extends.apply(this, arguments); }

function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; }

function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; subClass.__proto__ = superClass; }

function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i] != null ? arguments[i] : {}; var ownKeys = Object.keys(source); if (typeof Object.getOwnPropertySymbols === 'function') { ownKeys = ownKeys.concat(Object.getOwnPropertySymbols(source).filter(function (sym) { return Object.getOwnPropertyDescriptor(source, sym).enumerable; })); } ownKeys.forEach(function (key) { _defineProperty(target, key, source[key]); }); } return target; }

function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }

var DraftEditorNode = require("./DraftEditorNode.react");

var DraftOffsetKey = require("./DraftOffsetKey");

var React = require("react");

var Scroll = require("fbjs/lib/Scroll");

var Style = require("fbjs/lib/Style");

var getElementPosition = require("fbjs/lib/getElementPosition");

var getScrollPosition = require("fbjs/lib/getScrollPosition");

var getViewportDimensions = require("fbjs/lib/getViewportDimensions");

var Immutable = require("immutable");

var invariant = require("fbjs/lib/invariant");

var isHTMLElement = require("./isHTMLElement");

var SCROLL_BUFFER = 10;
var List = Immutable.List; // we should harden up the bellow flow types to make them more strict

/**
 * Return whether a block overlaps with either edge of the `SelectionState`.
 */
var isBlockOnSelectionEdge = function isBlockOnSelectionEdge(selection, key) {
  return selection.getAnchorKey() === key || selection.getFocusKey() === key;
};
/**
 * We will use this helper to identify blocks that need to be wrapped but have siblings that
 * also share the same wrapper element, this way we can do the wrapping once the last sibling
 * is added.
 */


var shouldNotAddWrapperElement = function shouldNotAddWrapperElement(block, contentState) {
  var nextSiblingKey = block.getNextSiblingKey();
  return nextSiblingKey ? contentState.getBlockForKey(nextSiblingKey).getType() === block.getType() : false;
};

var applyWrapperElementToSiblings = function applyWrapperElementToSiblings(wrapperTemplate, Element, nodes) {
  var wrappedSiblings = []; // we check back until we find a sibling that does not have same wrapper

  var _iteratorNormalCompletion = true;
  var _didIteratorError = false;
  var _iteratorError = undefined;

  try {
    for (var _iterator = nodes.reverse()[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true) {
      var sibling = _step.value;

      if (sibling.type !== Element) {
        break;
      }

      wrappedSiblings.push(sibling);
    } // we now should remove from acc the wrappedSiblings and add them back under same wrap

  } catch (err) {
    _didIteratorError = true;
    _iteratorError = err;
  } finally {
    try {
      if (!_iteratorNormalCompletion && _iterator["return"] != null) {
        _iterator["return"]();
      }
    } finally {
      if (_didIteratorError) {
        throw _iteratorError;
      }
    }
  }

  nodes.splice(nodes.indexOf(wrappedSiblings[0]), wrappedSiblings.length + 1);
  var childrenIs = wrappedSiblings.reverse();
  var key = childrenIs[0].key;
  nodes.push(React.cloneElement(wrapperTemplate, {
    key: "".concat(key, "-wrap"),
    'data-offset-key': DraftOffsetKey.encode(key, 0, 0)
  }, childrenIs));
  return nodes;
};

var getDraftRenderConfig = function getDraftRenderConfig(block, blockRenderMap) {
  var configForType = blockRenderMap.get(block.getType()) || blockRenderMap.get('unstyled');
  var wrapperTemplate = configForType.wrapper;
  var Element = configForType.element || blockRenderMap.get('unstyled').element;
  return {
    Element: Element,
    wrapperTemplate: wrapperTemplate
  };
};

var getCustomRenderConfig = function getCustomRenderConfig(block, blockRendererFn) {
  var customRenderer = blockRendererFn(block);

  if (!customRenderer) {
    return {};
  }

  var CustomComponent = customRenderer.component,
      customProps = customRenderer.props,
      customEditable = customRenderer.editable;
  return {
    CustomComponent: CustomComponent,
    customProps: customProps,
    customEditable: customEditable
  };
};

var getElementPropsConfig = function getElementPropsConfig(block, editorKey, offsetKey, blockStyleFn, customConfig, ref) {
  var elementProps = {
    'data-block': true,
    'data-editor': editorKey,
    'data-offset-key': offsetKey,
    key: block.getKey(),
    ref: ref
  };
  var customClass = blockStyleFn(block);

  if (customClass) {
    elementProps.className = customClass;
  }

  if (customConfig.customEditable !== undefined) {
    elementProps = _objectSpread({}, elementProps, {
      contentEditable: customConfig.customEditable,
      suppressContentEditableWarning: true
    });
  }

  return elementProps;
};

var DraftEditorBlockNode = /*#__PURE__*/function (_React$Component) {
  _inheritsLoose(DraftEditorBlockNode, _React$Component);

  function DraftEditorBlockNode() {
    var _this;

    for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
      args[_key] = arguments[_key];
    }

    _this = _React$Component.call.apply(_React$Component, [this].concat(args)) || this;

    _defineProperty(_assertThisInitialized(_this), "wrapperRef", React.createRef());

    return _this;
  }

  var _proto = DraftEditorBlockNode.prototype;

  _proto.shouldComponentUpdate = function shouldComponentUpdate(nextProps) {
    var _this$props = this.props,
        block = _this$props.block,
        direction = _this$props.direction,
        tree = _this$props.tree;
    var isContainerNode = !block.getChildKeys().isEmpty();
    var blockHasChanged = block !== nextProps.block || tree !== nextProps.tree || direction !== nextProps.direction || isBlockOnSelectionEdge(nextProps.selection, nextProps.block.getKey()) && nextProps.forceSelection; // if we have children at this stage we always re-render container nodes
    // else if its a root node we avoid re-rendering by checking for block updates

    return isContainerNode || blockHasChanged;
  }
  /**
   * When a block is mounted and overlaps the selection state, we need to make
   * sure that the cursor is visible to match native behavior. This may not
   * be the case if the user has pressed `RETURN` or pasted some content, since
   * programatically creating these new blocks and setting the DOM selection
   * will miss out on the browser natively scrolling to that position.
   *
   * To replicate native behavior, if the block overlaps the selection state
   * on mount, force the scroll position. Check the scroll state of the scroll
   * parent, and adjust it to align the entire block to the bottom of the
   * scroll parent.
   */
  ;

  _proto.componentDidMount = function componentDidMount() {
    var selection = this.props.selection;
    var endKey = selection.getEndKey();

    if (!selection.getHasFocus() || endKey !== this.props.block.getKey()) {
      return;
    }

    var blockNode = this.wrapperRef.current;

    if (!blockNode) {
      // This Block Node was rendered without a wrapper element.
      return;
    }

    var scrollParent = Style.getScrollParent(blockNode);
    var scrollPosition = getScrollPosition(scrollParent);
    var scrollDelta;

    if (scrollParent === window) {
      var nodePosition = getElementPosition(blockNode);
      var nodeBottom = nodePosition.y + nodePosition.height;
      var viewportHeight = getViewportDimensions().height;
      scrollDelta = nodeBottom - viewportHeight;

      if (scrollDelta > 0) {
        window.scrollTo(scrollPosition.x, scrollPosition.y + scrollDelta + SCROLL_BUFFER);
      }
    } else {
      !isHTMLElement(blockNode) ? process.env.NODE_ENV !== "production" ? invariant(false, 'blockNode is not an HTMLElement') : invariant(false) : void 0;
      var htmlBlockNode = blockNode;
      var blockBottom = htmlBlockNode.offsetHeight + htmlBlockNode.offsetTop;
      var scrollBottom = scrollParent.offsetHeight + scrollPosition.y;
      scrollDelta = blockBottom - scrollBottom;

      if (scrollDelta > 0) {
        Scroll.setTop(scrollParent, Scroll.getTop(scrollParent) + scrollDelta + SCROLL_BUFFER);
      }
    }
  };

  _proto.render = function render() {
    var _this2 = this;

    var _this$props2 = this.props,
        block = _this$props2.block,
        blockRenderMap = _this$props2.blockRenderMap,
        blockRendererFn = _this$props2.blockRendererFn,
        blockStyleFn = _this$props2.blockStyleFn,
        contentState = _this$props2.contentState,
        decorator = _this$props2.decorator,
        editorKey = _this$props2.editorKey,
        editorState = _this$props2.editorState,
        customStyleFn = _this$props2.customStyleFn,
        customStyleMap = _this$props2.customStyleMap,
        direction = _this$props2.direction,
        forceSelection = _this$props2.forceSelection,
        selection = _this$props2.selection,
        tree = _this$props2.tree;
    var children = null;

    if (block.children.size) {
      children = block.children.reduce(function (acc, key) {
        var offsetKey = DraftOffsetKey.encode(key, 0, 0);
        var child = contentState.getBlockForKey(key);
        var customConfig = getCustomRenderConfig(child, blockRendererFn);
        var Component = customConfig.CustomComponent || DraftEditorBlockNode;

        var _getDraftRenderConfig = getDraftRenderConfig(child, blockRenderMap),
            Element = _getDraftRenderConfig.Element,
            wrapperTemplate = _getDraftRenderConfig.wrapperTemplate;

        var elementProps = getElementPropsConfig(child, editorKey, offsetKey, blockStyleFn, customConfig, null);

        var childProps = _objectSpread({}, _this2.props, {
          tree: editorState.getBlockTree(key),
          blockProps: customConfig.customProps,
          offsetKey: offsetKey,
          block: child
        });

        acc.push(React.createElement(Element, elementProps, React.createElement(Component, childProps)));

        if (!wrapperTemplate || shouldNotAddWrapperElement(child, contentState)) {
          return acc;
        } // if we are here it means we are the last block
        // that has a wrapperTemplate so we should wrap itself
        // and all other previous siblings that share the same wrapper


        applyWrapperElementToSiblings(wrapperTemplate, Element, acc);
        return acc;
      }, []);
    }

    var blockKey = block.getKey();
    var offsetKey = DraftOffsetKey.encode(blockKey, 0, 0);
    var customConfig = getCustomRenderConfig(block, blockRendererFn);
    var Component = customConfig.CustomComponent;
    var blockNode = Component != null ? React.createElement(Component, _extends({}, this.props, {
      tree: editorState.getBlockTree(blockKey),
      blockProps: customConfig.customProps,
      offsetKey: offsetKey,
      block: block
    })) : React.createElement(DraftEditorNode, {
      block: block,
      children: children,
      contentState: contentState,
      customStyleFn: customStyleFn,
      customStyleMap: customStyleMap,
      decorator: decorator,
      direction: direction,
      forceSelection: forceSelection,
      hasSelection: isBlockOnSelectionEdge(selection, blockKey),
      selection: selection,
      tree: tree
    });

    if (block.getParentKey()) {
      return blockNode;
    }

    var _getDraftRenderConfig2 = getDraftRenderConfig(block, blockRenderMap),
        Element = _getDraftRenderConfig2.Element;

    var elementProps = getElementPropsConfig(block, editorKey, offsetKey, blockStyleFn, customConfig, this.wrapperRef); // root block nodes needs to be wrapped

    return React.createElement(Element, elementProps, blockNode);
  };

  return DraftEditorBlockNode;
}(React.Component);

module.exports = DraftEditorBlockNode;