custom-app
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206 lines (171 loc) • 8.53 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
* @format
*
*/
;
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 DraftEditorLeaf = require('./DraftEditorLeaf.react');
var DraftOffsetKey = require('./DraftOffsetKey');
var React = require('react');
var ReactDOM = require('react-dom');
var Scroll = require('fbjs/lib/Scroll');
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 invariant = require('fbjs/lib/invariant');
var nullthrows = require('fbjs/lib/nullthrows');
var SCROLL_BUFFER = 10;
/**
* Return whether a block overlaps with either edge of the `SelectionState`.
*/
var isBlockOnSelectionEdge = function isBlockOnSelectionEdge(selection, key) {
return selection.getAnchorKey() === key || selection.getFocusKey() === key;
};
/**
* 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);
return _possibleConstructorReturn(this, _React$Component.apply(this, arguments));
}
DraftEditorBlock.prototype.shouldComponentUpdate = 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.
*/
DraftEditorBlock.prototype.componentDidMount = 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 = void 0;
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 {
!(blockNode instanceof HTMLElement) ? process.env.NODE_ENV !== 'production' ? invariant(false, 'blockNode is not an HTMLElement') : invariant(false) : void 0;
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);
}
}
};
DraftEditorBlock.prototype._renderChildren = function _renderChildren() {
var _this2 = 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,
block: block,
start: start,
selection: hasSelection ? _this2.props.selection : null,
forceSelection: _this2.props.forceSelection,
text: text.slice(start, end),
styleSet: block.getInlineStyleAt(start),
customStyleMap: _this2.props.customStyleMap,
customStyleFn: _this2.props.customStyleFn,
isLast: ii === lastLeafSet && jj === lastLeaf
});
}).toArray();
var decoratorKey = leafSet.get('decoratorKey');
if (decoratorKey == null) {
return leaves;
}
if (!_this2.props.decorator) {
return leaves;
}
var decorator = nullthrows(_this2.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), _this2.props.direction);
return React.createElement(
DecoratorComponent,
_extends({}, decoratorProps, {
contentState: _this2.props.contentState,
decoratedText: decoratedText,
dir: dir,
key: decoratorOffsetKey,
entityKey: block.getEntityAt(leafSet.get('start')),
offsetKey: decoratorOffsetKey }),
leaves
);
}).toArray();
};
DraftEditorBlock.prototype.render = function render() {
var _props = this.props,
direction = _props.direction,
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);
module.exports = DraftEditorBlock;