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svg-icon-layer.ts
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svg-icon-layer.ts
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// Copyright (c) 2022 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
import {CompositeLayer} from '@deck.gl/core';
import {CompositeLayerProps} from '@deck.gl/core/lib/composite-layer';
import {Position, RGBAColor} from 'deck.gl';
import {RGBColor} from '@kepler.gl/types';
import ScatterplotIconLayer from './scatterplot-icon-layer';
// default icon geometry is a square
const DEFAULT_ICON_GEOMETRY = [1, 1, 0, 1, -1, 0, -1, -1, 0, -1, -1, 0, -1, 1, 0, 1, 1, 0];
const defaultProps = {
getIconGeometry: (iconId: string) => DEFAULT_ICON_GEOMETRY,
getIcon: (d: {icon: string}) => d.icon
};
export interface SvgIconLayerProps extends CompositeLayerProps<any> {
getIconGeometry: (i: string) => number[];
getIcon: (d: {icon: string}) => string;
getPosition: (d: any) => Position;
getRadius: ((d: any) => number) | number;
getFillColor: RGBColor | RGBAColor;
}
export default class SvgIconLayer extends CompositeLayer<any, SvgIconLayerProps> {
// Must be defined
initializeState() {
this.state = {
data: {}
};
}
updateState({changeFlags}) {
if (changeFlags.dataChanged) {
this._extractSublayers();
}
}
_extractSublayers() {
const {data, getIconGeometry, getIcon} = this.props;
const iconLayers = {};
for (let i = 0; i < data.length; i++) {
const iconId = getIcon(data[i]);
iconLayers[iconId] = iconLayers[iconId] || {
id: iconId,
geometry: getIconGeometry(iconId) || DEFAULT_ICON_GEOMETRY,
data: []
};
iconLayers[iconId].data.push(data[i]);
}
this.setState({
data: Object.values(iconLayers)
});
}
renderLayers() {
const layerId = this.props.id;
const layers =
this.state.data &&
this.state.data.length &&
this.state.data.map(
({id, data, geometry}) =>
new ScatterplotIconLayer({
...this.props,
id: `${layerId}-${id}`,
data,
iconGeometry: geometry
})
);
return layers && layers.length > 0 ? layers : null;
}
}
SvgIconLayer.layerName = 'SvgIconLayer';
SvgIconLayer.defaultProps = defaultProps;