d2-ui
Version:
210 lines (178 loc) • 9.5 kB
JavaScript
/**
* 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 DraftEditorBlock.react
* @typechecks
*
*/
;
var _extends = Object.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; };
var _createClass = (function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ('value' in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; })();
var _get = function get(_x, _x2, _x3) { var _again = true; _function: while (_again) { var object = _x, property = _x2, receiver = _x3; _again = false; if (object === null) object = Function.prototype; var desc = Object.getOwnPropertyDescriptor(object, property); if (desc === undefined) { var parent = Object.getPrototypeOf(object); if (parent === null) { return undefined; } else { _x = parent; _x2 = property; _x3 = receiver; _again = true; desc = parent = undefined; continue _function; } } else if ('value' in desc) { return desc.value; } else { var getter = desc.get; if (getter === undefined) { return undefined; } return getter.call(receiver); } } };
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } }
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 ContentBlock = require('./ContentBlock');
var DraftEditorLeaf = require('./DraftEditorLeaf.react');
var DraftOffsetKey = require('./DraftOffsetKey');
var React = require('react');
var ReactDOM = require('react-dom');
var Scroll = require('fbjs/lib/Scroll');
var SelectionState = require('./SelectionState');
var Style = require('fbjs/lib/Style');
var UnicodeBidi = require('fbjs/lib/UnicodeBidi');
var UnicodeBidiDirection = require('fbjs/lib/UnicodeBidiDirection');
var cx = require('fbjs/lib/cx');
var getElementPosition = require('fbjs/lib/getElementPosition');
var getScrollPosition = require('fbjs/lib/getScrollPosition');
var getViewportDimensions = require('fbjs/lib/getViewportDimensions');
var nullthrows = require('fbjs/lib/nullthrows');
var SCROLL_BUFFER = 10;
/**
* The default block renderer for a `DraftEditor` component.
*
* A `DraftEditorBlock` is able to render a given `ContentBlock` to its
* appropriate decorator and inline style components.
*/
var DraftEditorBlock = (function (_React$Component) {
_inherits(DraftEditorBlock, _React$Component);
function DraftEditorBlock() {
_classCallCheck(this, DraftEditorBlock);
_get(Object.getPrototypeOf(DraftEditorBlock.prototype), 'constructor', this).apply(this, arguments);
}
/**
* Return whether a block overlaps with either edge of the `SelectionState`.
*/
_createClass(DraftEditorBlock, [{
key: 'shouldComponentUpdate',
value: function shouldComponentUpdate(nextProps) {
return this.props.block !== nextProps.block || this.props.tree !== nextProps.tree || this.props.direction !== nextProps.direction || isBlockOnSelectionEdge(nextProps.selection, nextProps.block.getKey()) && nextProps.forceSelection;
}
/**
* 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.
*/
}, {
key: 'componentDidMount',
value: function componentDidMount() {
var selection = this.props.selection;
var endKey = selection.getEndKey();
if (!selection.getHasFocus() || endKey !== this.props.block.getKey()) {
return;
}
var blockNode = ReactDOM.findDOMNode(this);
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 {
var blockBottom = blockNode.offsetHeight + blockNode.offsetTop;
var scrollBottom = scrollParent.offsetHeight + scrollPosition.y;
scrollDelta = blockBottom - scrollBottom;
if (scrollDelta > 0) {
Scroll.setTop(scrollParent, Scroll.getTop(scrollParent) + scrollDelta + SCROLL_BUFFER);
}
}
}
}, {
key: '_renderChildren',
value: function _renderChildren() {
var _this = this;
var block = this.props.block;
var blockKey = block.getKey();
var text = block.getText();
var lastLeafSet = this.props.tree.size - 1;
var hasSelection = isBlockOnSelectionEdge(this.props.selection, blockKey);
return this.props.tree.map(function (leafSet, ii) {
var leavesForLeafSet = leafSet.get('leaves');
var lastLeaf = leavesForLeafSet.size - 1;
var leaves = leavesForLeafSet.map(function (leaf, jj) {
var offsetKey = DraftOffsetKey.encode(blockKey, ii, jj);
var start = leaf.get('start');
var end = leaf.get('end');
return React.createElement(DraftEditorLeaf, {
key: offsetKey,
offsetKey: offsetKey,
blockKey: blockKey,
start: start,
selection: hasSelection ? _this.props.selection : undefined,
forceSelection: _this.props.forceSelection,
text: text.slice(start, end),
styleSet: block.getInlineStyleAt(start),
customStyleMap: _this.props.customStyleMap,
isLast: ii === lastLeafSet && jj === lastLeaf
});
}).toArray();
var decoratorKey = leafSet.get('decoratorKey');
if (decoratorKey == null) {
return leaves;
}
if (!_this.props.decorator) {
return leaves;
}
var decorator = nullthrows(_this.props.decorator);
var DecoratorComponent = decorator.getComponentForKey(decoratorKey);
if (!DecoratorComponent) {
return leaves;
}
var decoratorProps = decorator.getPropsForKey(decoratorKey);
var decoratorOffsetKey = DraftOffsetKey.encode(blockKey, ii, 0);
var decoratedText = text.slice(leavesForLeafSet.first().get('start'), leavesForLeafSet.last().get('end'));
// Resetting dir to the same value on a child node makes Chrome/Firefox
// confused on cursor movement. See http://jsfiddle.net/d157kLck/3/
var dir = UnicodeBidiDirection.getHTMLDirIfDifferent(UnicodeBidi.getDirection(decoratedText), _this.props.direction);
return React.createElement(
DecoratorComponent,
_extends({}, decoratorProps, {
decoratedText: decoratedText,
dir: dir,
key: decoratorOffsetKey,
entityKey: block.getEntityAt(leafSet.get('start')),
offsetKey: decoratorOffsetKey }),
leaves
);
}).toArray();
}
}, {
key: 'render',
value: function render() {
var _props = this.props;
var direction = _props.direction;
var offsetKey = _props.offsetKey;
var className = cx({
'public/DraftStyleDefault/block': true,
'public/DraftStyleDefault/ltr': direction === 'LTR',
'public/DraftStyleDefault/rtl': direction === 'RTL'
});
return React.createElement(
'div',
{ 'data-offset-key': offsetKey, className: className },
this._renderChildren()
);
}
}]);
return DraftEditorBlock;
})(React.Component);
function isBlockOnSelectionEdge(selection, key) {
return selection.getAnchorKey() === key || selection.getFocusKey() === key;
}
module.exports = DraftEditorBlock;