Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 | 1x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 1x 1x 1x | import React from 'react';
import PropTypes from 'prop-types';
import ResizeObserver from 'resize-observer-polyfill';
import Point from './Point';
import SvgArrow from './SvgArrow';
const svgContainerStyle = {
position: 'absolute',
width: '100%',
height: '100%',
top: 0,
left: 0,
};
function rectToPoint(rect) {
return new Point(rect.left, rect.top);
}
function computeCoordinatesFromAnchorPosition(anchorPosition, rect) {
switch (anchorPosition) {
case 'top':
return rectToPoint(rect).add(new Point(rect.width / 2, 0));
case 'bottom':
return rectToPoint(rect).add(new Point(rect.width / 2, rect.height));
case 'left':
return rectToPoint(rect).add(new Point(0, rect.height / 2));
case 'right':
return rectToPoint(rect).add(new Point(rect.width, rect.height / 2));
default:
return new Point(0, 0);
}
}
export class ArcherContainer extends React.Component {
constructor(props) {
super(props);
const observer = new ResizeObserver(() => {
this.refreshScreen();
});
this.state = {
refs: {},
fromTo: [],
observer,
};
}
componentDidMount() {
window.addEventListener('resize', this.refreshScreen);
}
componentWillUnmount() {
Object.keys(this.state.refs).map(elementKey => {
const { observer } = this.state;
observer.unobserve(this.state.refs[elementKey]);
});
window.removeEventListener('resize', this.refreshScreen);
}
refreshScreen = () => {
this.setState({ ...this.state });
};
getChildContext = () => {
return {
registerTransition: this.registerTransition,
registerChild: this.registerChild,
};
};
storeParent = ref => {
if (this.state.parent) {
return;
}
this.setState(currentState => ({ ...currentState, parent: ref }));
};
getRectFromRef = ref => {
Eif (!ref) {
return new Point(0, 0);
}
return ref.getBoundingClientRect();
};
getParentCoordinates = () => {
const rectp = this.getRectFromRef(this.state.parent);
return rectToPoint(rectp);
};
getPointCoordinatesFromAnchorPosition = (
position,
index,
parentCoordinates,
) => {
const rect = this.getRectFromRef(this.state.refs[index]);
const absolutePosition = computeCoordinatesFromAnchorPosition(
position,
rect,
);
return absolutePosition.substract(parentCoordinates);
};
registerTransition = (fromElement, relation) => {
// TODO prevent duplicate registering
// TODO improve the state merge... (should be shorter)
const fromTo = [...this.state.fromTo];
const newFromTo = {
...relation,
from: { ...relation.from, id: fromElement },
};
fromTo.push(newFromTo);
this.setState(currentState => {
return {
...this.currentState,
fromTo: [...currentState.fromTo, ...fromTo],
};
});
};
registerChild = id => {
return ref => {
if (!this.state.refs[id]) {
this.state.observer.observe(ref);
this.setState(currentState => {
return {
...this.currentState,
refs: { ...currentState.refs, [id]: ref },
};
});
}
};
};
computeArrows = () => {
const parentCoordinates = this.getParentCoordinates();
return this.state.fromTo.map(sd => {
const { from, to, label } = sd;
const startingAnchor = from.anchor;
const startingPoint = this.getPointCoordinatesFromAnchorPosition(
from.anchor,
from.id,
parentCoordinates,
);
const endingAnchor = to.anchor;
const endingPoint = this.getPointCoordinatesFromAnchorPosition(
to.anchor,
to.id,
parentCoordinates,
);
return (
<SvgArrow
key={JSON.stringify({ from, to })}
startingPoint={startingPoint}
startingAnchor={startingAnchor}
endingPoint={endingPoint}
endingAnchor={endingAnchor}
strokeColor={this.props.strokeColor}
arrowLength={this.props.arrowLength}
strokeWidth={this.props.strokeWidth}
arrowLabel={label}
/>
);
});
};
render() {
const SvgArrows = this.computeArrows();
const arrowPath = `M0,0 L0,${this.props.arrowThickness} L${this.props
.arrowLength - 1},${this.props.arrowThickness / 2} z`;
return (
<div
style={{ ...this.props.style, position: 'relative' }}
className={this.props.className}
>
<svg style={svgContainerStyle}>
<defs>
<marker
id="arrow"
markerWidth={this.props.arrowLength}
markerHeight={this.props.arrowThickness}
refX="0"
refY={this.props.arrowThickness / 2}
orient="auto"
markerUnits="strokeWidth"
>
<path d={arrowPath} fill={this.props.strokeColor} />
</marker>
</defs>
{SvgArrows}
</svg>
<div ref={this.storeParent}>{this.props.children}</div>
</div>
);
}
}
ArcherContainer.propTypes = {
arrowLength: PropTypes.number,
arrowThickness: PropTypes.number,
strokeColor: PropTypes.string,
strokeWidth: PropTypes.number,
children: PropTypes.node,
style: PropTypes.object,
className: PropTypes.string,
};
ArcherContainer.defaultProps = {
arrowLength: 10,
arrowThickness: 6,
strokeColor: '#f00',
strokeWidth: 2,
};
ArcherContainer.childContextTypes = {
registerChild: PropTypes.func,
registerTransition: PropTypes.func,
};
export default ArcherContainer;
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