/**
 * Copyright (c) 2013-present, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * LICENSE file in the root directory of this source tree. An additional grant
 * of patent rights can be found in the PATENTS file in the same directory.
 *
 * @providesModule DraftEditorContents.react
 * @typechecks
 * 
 */

'use strict';

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

var _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; };

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

function _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return call && (typeof call === "object" || typeof call === "function") ? call : self; }

function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }

var DraftEditorBlock = require('./DraftEditorBlock.react');
var DraftOffsetKey = require('./DraftOffsetKey');
var EditorState = require('./EditorState');
var React = require('react');

var cx = require('fbjs/lib/cx');
var joinClasses = require('fbjs/lib/joinClasses');
var nullthrows = require('fbjs/lib/nullthrows');

/**
 * `DraftEditorContents` is the container component for all block components
 * rendered for a `DraftEditor`. It is optimized to aggressively avoid
 * re-rendering blocks whenever possible.
 *
 * This component is separate from `DraftEditor` because certain props
 * (for instance, ARIA props) must be allowed to update without affecting
 * the contents of the editor.
 */
var DraftEditorContents = function (_React$Component) {
  _inherits(DraftEditorContents, _React$Component);

  function DraftEditorContents() {
    _classCallCheck(this, DraftEditorContents);

    return _possibleConstructorReturn(this, _React$Component.apply(this, arguments));
  }

  DraftEditorContents.prototype.shouldComponentUpdate = function shouldComponentUpdate(nextProps) {
    var prevEditorState = this.props.editorState;
    var nextEditorState = nextProps.editorState;

    var prevDirectionMap = prevEditorState.getDirectionMap();
    var nextDirectionMap = nextEditorState.getDirectionMap();

    // Text direction has changed for one or more blocks. We must re-render.
    if (prevDirectionMap !== nextDirectionMap) {
      return true;
    }

    var didHaveFocus = prevEditorState.getSelection().getHasFocus();
    var nowHasFocus = nextEditorState.getSelection().getHasFocus();

    if (didHaveFocus !== nowHasFocus) {
      return true;
    }

    var nextNativeContent = nextEditorState.getNativelyRenderedContent();

    var wasComposing = prevEditorState.isInCompositionMode();
    var nowComposing = nextEditorState.isInCompositionMode();

    // If the state is unchanged or we're currently rendering a natively
    // rendered state, there's nothing new to be done.
    if (prevEditorState === nextEditorState || nextNativeContent !== null && nextEditorState.getCurrentContent() === nextNativeContent || wasComposing && nowComposing) {
      return false;
    }

    var prevContent = prevEditorState.getCurrentContent();
    var nextContent = nextEditorState.getCurrentContent();
    var prevDecorator = prevEditorState.getDecorator();
    var nextDecorator = nextEditorState.getDecorator();
    return wasComposing !== nowComposing || prevContent !== nextContent || prevDecorator !== nextDecorator || nextEditorState.mustForceSelection();
  };

  DraftEditorContents.prototype.render = function render() {
    var _props = this.props;
    var blockRenderMap = _props.blockRenderMap;
    var blockRendererFn = _props.blockRendererFn;
    var customStyleMap = _props.customStyleMap;
    var customStyleFn = _props.customStyleFn;
    var editorState = _props.editorState;


    var content = editorState.getCurrentContent();
    var selection = editorState.getSelection();
    var forceSelection = editorState.mustForceSelection();
    var decorator = editorState.getDecorator();
    var directionMap = nullthrows(editorState.getDirectionMap());

    var blocksAsArray = content.getBlocksAsArray();
    var processedBlocks = [];
    var currentDepth = null;
    var lastWrapperTemplate = null;

    for (var ii = 0; ii < blocksAsArray.length; ii++) {
      var _block = blocksAsArray[ii];
      var key = _block.getKey();
      var blockType = _block.getType();

      var customRenderer = blockRendererFn(_block);
      var CustomComponent = void 0,
          customProps = void 0,
          customEditable = void 0;
      if (customRenderer) {
        CustomComponent = customRenderer.component;
        customProps = customRenderer.props;
        customEditable = customRenderer.editable;
      }

      var direction = directionMap.get(key);
      var offsetKey = DraftOffsetKey.encode(key, 0, 0);
      var componentProps = {
        block: _block,
        blockProps: customProps,
        customStyleMap: customStyleMap,
        customStyleFn: customStyleFn,
        decorator: decorator,
        direction: direction,
        forceSelection: forceSelection,
        key: key,
        offsetKey: offsetKey,
        selection: selection,
        tree: editorState.getBlockTree(key)
      };

      var configForType = blockRenderMap.get(blockType);
      var wrapperTemplate = configForType.wrapper;

      var _Element = configForType.element || blockRenderMap.get('unstyled').element;

      var depth = _block.getDepth();
      var className = this.props.blockStyleFn(_block);

      // List items are special snowflakes, since we handle nesting and
      // counters manually.
      if (_Element === 'li') {
        var shouldResetCount = lastWrapperTemplate !== wrapperTemplate || currentDepth === null || depth > currentDepth;
        className = joinClasses(className, getListItemClasses(blockType, depth, shouldResetCount, direction));
      }

      var Component = CustomComponent || DraftEditorBlock;
      var childProps = {
        className: className,
        'data-block': true,
        'data-editor': this.props.editorKey,
        'data-offset-key': offsetKey,
        key: key
      };
      if (customEditable !== undefined) {
        childProps = _extends({}, childProps, {
          contentEditable: customEditable,
          suppressContentEditableWarning: true
        });
      }

      var child = React.createElement(_Element, childProps, React.createElement(Component, componentProps));

      processedBlocks.push({
        block: child,
        wrapperTemplate: wrapperTemplate,
        key: key,
        offsetKey: offsetKey
      });

      if (wrapperTemplate) {
        currentDepth = _block.getDepth();
      } else {
        currentDepth = null;
      }
      lastWrapperTemplate = wrapperTemplate;
    }

    // Group contiguous runs of blocks that have the same wrapperTemplate
    var outputBlocks = [];
    for (var _ii = 0; _ii < processedBlocks.length;) {
      var info = processedBlocks[_ii];
      if (info.wrapperTemplate) {
        var blocks = [];
        do {
          blocks.push(processedBlocks[_ii].block);
          _ii++;
        } while (_ii < processedBlocks.length && processedBlocks[_ii].wrapperTemplate === info.wrapperTemplate);
        var wrapperElement = React.cloneElement(info.wrapperTemplate, {
          key: info.key + '-wrap',
          'data-offset-key': info.offsetKey
        }, blocks);
        outputBlocks.push(wrapperElement);
      } else {
        outputBlocks.push(info.block);
        _ii++;
      }
    }

    return React.createElement(
      'div',
      { 'data-contents': 'true' },
      outputBlocks
    );
  };

  return DraftEditorContents;
}(React.Component);

/**
 * Provide default styling for list items. This way, lists will be styled with
 * proper counters and indentation even if the caller does not specify
 * their own styling at all. If more than five levels of nesting are needed,
 * the necessary CSS classes can be provided via `blockStyleFn` configuration.
 */


function getListItemClasses(type, depth, shouldResetCount, direction) {
  return cx({
    'public/DraftStyleDefault/unorderedListItem': type === 'unordered-list-item',
    'public/DraftStyleDefault/orderedListItem': type === 'ordered-list-item',
    'public/DraftStyleDefault/reset': shouldResetCount,
    'public/DraftStyleDefault/depth0': depth === 0,
    'public/DraftStyleDefault/depth1': depth === 1,
    'public/DraftStyleDefault/depth2': depth === 2,
    'public/DraftStyleDefault/depth3': depth === 3,
    'public/DraftStyleDefault/depth4': depth === 4,
    'public/DraftStyleDefault/listLTR': direction === 'LTR',
    'public/DraftStyleDefault/listRTL': direction === 'RTL'
  });
}

module.exports = DraftEditorContents;