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| import React from 'react';
import _ from 'lodash';
import Portal from '../Portal/Portal';
import { createClass, getFirst, omitProps } from '../../util/component-types';
import { getAbsoluteBoundingClientRect } from '../../util/dom-helpers';
import { lucidClassNames } from '../../util/style-helpers';
const cx = lucidClassNames.bind('&-ContextMenu');
const {
PropTypes: {
bool,
node,
func,
number,
object,
oneOf,
string,
},
} = React;
/**
*
* {"categories": ["utility"], "madeFrom": ["Portal"]}
*
* A ContextMenu component is used to render a target and a flyout which is positioned relative to the target.
*/
const ContextMenu = createClass({
displayName: 'ContextMenu',
propTypes: {
/**
* `children` should include exactly one ContextMenu.Target and one ContextMenu.FlyOut.
*/
children: node,
/**
* Appended to the component-specific class names set on the root element.
*/
className: string,
/**
* Passed through to the root element.
*/
style: object,
/**
* direction of the FlyOut relative to Target. Defaults to `'down'`.
*/
direction: oneOf(['down', 'up', 'right', 'left']),
/**
* the px offset along the axis of the direction
*/
directonOffset: number,
/**
* alignment of the Flyout relative to Target in the cross axis from `direction` Defaults to `'start'`
*/
alignment: oneOf(['start', 'center', 'end']),
/**
* the px offset along the axis of the alignment
*/
alignmentOffset: number,
/**
* an alternative to `alignmentOffset`, a function that is applied with the width/height of the flyout. the result is used as the `alignmentOffset`
*/
getAlignmentOffset: func,
/**
* Indicates whether the FlyOut will render or not. Defaults to `true`.
*/
isExpanded: bool,
/**
* Called when a click event happenens outside of the ContextMenu, with the signature `({ props, event }) => { ... }`
*/
onClickOut: func,
/**
* The `id` of the FlyOut portal element that is appended to `document.body`. Defaults to a generated `id`.
*/
portalId: string,
},
components: {
/**
* Renders an element of `elementType` (defaults to `<span>`) that the menu `FlyOut` anchors to.
*/
Target: createClass({
displayName: 'ContextMenu.Target',
propTypes: {
elementType: string,
},
getDefaultProps() {
return {
elementType: 'span',
};
},
}),
/*
* Renders a `<Portal>` anchored to the `Target`.
*/
FlyOut: createClass({
displayName: 'ContextMenu.FlyOut',
propTypes: {
style: object,
},
}),
},
getDefaultProps() {
return {
direction: 'down',
directonOffset: 0,
alignment: 'start',
// no default alignmentOffset so it can default to result of `getAlignmentOffset`
getAlignmentOffset: _.constant(0),
isExpanded: true,
onClickOut: null,
portalId: null,
};
},
getInitialState() {
const {
portalId,
} = this.props;
return {
portalId: portalId || _.uniqueId('ContextMenu-Portal-'),
targetRect: {
bottom: 0,
top: 0,
left: 0,
right: 0,
height: 0,
width: 0,
},
flyOutHeight: 0,
flyOutWidth: 0,
};
},
componentDidMount() {
_.defer(() => this.alignFlyOut());
this.updateTargetRectangleIntervalId = setInterval(() => {
if (this.props.isExpanded) {
this.alignFlyOut();
}
}, 10);
this.onClickBodyEventListener = window.addEventListener('click', (event) => {
if (this.props.onClickOut && this.refs.flyOutPortal) {
const flyOutEl = this.refs.flyOutPortal.portalElement.firstChild;
if (!(flyOutEl.contains(event.target) || this.refs.target.contains(event.target))) {
this.props.onClickOut({ props: this.props, event });
}
}
});
},
componentWillUnmount() {
clearInterval(this.updateTargetRectangleIntervalId);
document.body.removeEventListener('click', this.onClickBodyEventListener);
},
componentWillReceiveProps() {
this.alignFlyOut();
},
statics: {
CENTER: 'center',
DOWN: 'down',
END: 'end',
LEFT: 'left',
RIGHT: 'right',
START: 'start',
UP: 'up',
},
getFlyoutPosition() {
const {
props: {
alignment,
getAlignmentOffset,
direction,
directonOffset,
},
state: {
flyOutHeight,
flyOutWidth,
targetRect: {
bottom,
left,
right,
top,
width,
height,
},
},
refs: { flyOutPortal },
} = this;
if (!flyOutPortal) {
return {};
}
const alignmentOffset = !_.isUndefined(this.props.alignmentOffset)
? this.props.alignmentOffset
: (alignment === ContextMenu.CENTER)
? (getAlignmentOffset(_.includes([ContextMenu.UP, ContextMenu.DOWN], direction) ? flyOutWidth : flyOutHeight))
: 0;
const {
CENTER,
DOWN,
END,
LEFT,
RIGHT,
START,
UP,
} = ContextMenu;
const {
clientWidth,
} = document.body;
// default styling hides portal because its position can't be calculated
// properly until after 1st render so here we unhide it if the ref exists
const style = {
opacity: 1,
maxHeight: 'none',
left: 'auto',
top: 'auto',
};
const matcher = _.matches({ direction, alignment });
Iif (matcher({ direction: UP, alignment: START })) {
return {
...style,
top: top - flyOutHeight - directonOffset,
left: left - alignmentOffset,
};
}
Iif (matcher({ direction: UP, alignment: END })) {
return {
...style,
top: top - flyOutHeight - directonOffset,
right: clientWidth - right - alignmentOffset,
};
}
Iif (matcher({ direction: UP, alignment: CENTER })) {
return {
...style,
top: top - flyOutHeight - directonOffset,
left: left + (width / 2) - (flyOutWidth / 2) + alignmentOffset,
};
}
Eif (matcher({ direction: DOWN, alignment: START })) {
return {
...style,
top: bottom + directonOffset,
left: left - alignmentOffset,
};
}
if (matcher({ direction: DOWN, alignment: END })) {
return {
...style,
top: bottom + directonOffset,
right: clientWidth - right - alignmentOffset,
};
}
if (matcher({ direction: DOWN, alignment: CENTER })) {
return {
...style,
top: bottom + directonOffset,
left: left + (width / 2) - (flyOutWidth / 2) + alignmentOffset,
};
}
if (matcher({ direction: LEFT, alignment: START })) {
return {
...style,
top: top - alignmentOffset,
right: clientWidth - left + directonOffset,
};
}
if (matcher({ direction: LEFT, alignment: END })) {
return {
...style,
top: top - flyOutHeight + height + alignmentOffset,
right: clientWidth - left + directonOffset,
};
}
if (matcher({ direction: LEFT, alignment: CENTER })) {
return {
...style,
top: top - (flyOutHeight / 2) + (height / 2) + alignmentOffset,
right: clientWidth - left + directonOffset,
};
}
if (matcher({ direction: RIGHT, alignment: START })) {
return {
...style,
top: top - alignmentOffset,
left: left + width + directonOffset,
};
}
if (matcher({ direction: RIGHT, alignment: END })) {
return {
...style,
top: top - flyOutHeight + height + alignmentOffset,
left: left + width + directonOffset,
};
}
if (matcher({ direction: RIGHT, alignment: CENTER })) {
return {
...style,
top: top - (flyOutHeight / 2) + (height / 2) + alignmentOffset,
left: left + width + directonOffset,
};
}
},
alignFlyOut() {
const {
refs: {
flyOutPortal,
target,
},
} = this;
if (!target || !flyOutPortal) {
return;
}
const targetRect = getAbsoluteBoundingClientRect(target);
Iif (!flyOutPortal) {
return this.setState({
targetRect,
});
}
const flyOutEl = flyOutPortal.portalElement.firstChild;
const {
height,
width,
} = flyOutEl.getBoundingClientRect();
this.setState({
targetRect,
flyOutHeight: height,
flyOutWidth: width,
});
},
render() {
const {
props: {
className,
direction,
isExpanded,
style,
...passThroughs,
},
state: {
portalId,
targetRect,
},
} = this;
const targetElement = getFirst(this.props, ContextMenu.Target);
const targetChildren = _.get(targetElement, 'props.children', null);
const TargetElementType = targetElement.props.elementType;
const flyoutElement = getFirst(this.props, ContextMenu.FlyOut);
const flyProps = _.get(flyoutElement, 'props', {});
return (
<TargetElementType ref='target' {...omitProps(passThroughs, ContextMenu)} className={cx('&', className)} style={style}>
{targetChildren}
{isExpanded ? (
<Portal
ref='flyOutPortal'
{...flyProps}
className={cx('&-FlyOut', `&-FlyOut-${direction}`, flyProps.className)}
portalId={portalId}
style={{
minWidth: targetRect.width,
...this.getFlyoutPosition(),
...flyProps.style,
}}
>
{flyProps.children}
</Portal>
) : null}
</TargetElementType>
);
},
});
export default ContextMenu;
|