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frontend/node_modules/echarts/lib/chart/heatmap/HeatmapLayer.js

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+
+/*
+* Licensed to the Apache Software Foundation (ASF) under one
+* or more contributor license agreements.  See the NOTICE file
+* distributed with this work for additional information
+* regarding copyright ownership.  The ASF licenses this file
+* to you under the Apache License, Version 2.0 (the
+* "License"); you may not use this file except in compliance
+* with the License.  You may obtain a copy of the License at
+*
+*   http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing,
+* software distributed under the License is distributed on an
+* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+* KIND, either express or implied.  See the License for the
+* specific language governing permissions and limitations
+* under the License.
+*/
+
+
+/**
+ * AUTO-GENERATED FILE. DO NOT MODIFY.
+ */
+
+/*
+* Licensed to the Apache Software Foundation (ASF) under one
+* or more contributor license agreements.  See the NOTICE file
+* distributed with this work for additional information
+* regarding copyright ownership.  The ASF licenses this file
+* to you under the Apache License, Version 2.0 (the
+* "License"); you may not use this file except in compliance
+* with the License.  You may obtain a copy of the License at
+*
+*   http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing,
+* software distributed under the License is distributed on an
+* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+* KIND, either express or implied.  See the License for the
+* specific language governing permissions and limitations
+* under the License.
+*/
+/* global Uint8ClampedArray */
+import { platformApi } from 'zrender/lib/core/platform.js';
+var GRADIENT_LEVELS = 256;
+var HeatmapLayer = /** @class */function () {
+  function HeatmapLayer() {
+    this.blurSize = 30;
+    this.pointSize = 20;
+    this.maxOpacity = 1;
+    this.minOpacity = 0;
+    this._gradientPixels = {
+      inRange: null,
+      outOfRange: null
+    };
+    var canvas = platformApi.createCanvas();
+    this.canvas = canvas;
+  }
+  /**
+   * Renders Heatmap and returns the rendered canvas
+   * @param data array of data, each has x, y, value
+   * @param width canvas width
+   * @param height canvas height
+   */
+  HeatmapLayer.prototype.update = function (data, width, height, normalize, colorFunc, isInRange) {
+    var brush = this._getBrush();
+    var gradientInRange = this._getGradient(colorFunc, 'inRange');
+    var gradientOutOfRange = this._getGradient(colorFunc, 'outOfRange');
+    var r = this.pointSize + this.blurSize;
+    var canvas = this.canvas;
+    var ctx = canvas.getContext('2d');
+    var len = data.length;
+    canvas.width = width;
+    canvas.height = height;
+    for (var i = 0; i < len; ++i) {
+      var p = data[i];
+      var x = p[0];
+      var y = p[1];
+      var value = p[2];
+      // calculate alpha using value
+      var alpha = normalize(value);
+      // draw with the circle brush with alpha
+      ctx.globalAlpha = alpha;
+      ctx.drawImage(brush, x - r, y - r);
+    }
+    if (!canvas.width || !canvas.height) {
+      // Avoid "Uncaught DOMException: Failed to execute 'getImageData' on
+      // 'CanvasRenderingContext2D': The source height is 0."
+      return canvas;
+    }
+    // colorize the canvas using alpha value and set with gradient
+    var imageData = ctx.getImageData(0, 0, canvas.width, canvas.height);
+    var pixels = imageData.data;
+    var offset = 0;
+    var pixelLen = pixels.length;
+    var minOpacity = this.minOpacity;
+    var maxOpacity = this.maxOpacity;
+    var diffOpacity = maxOpacity - minOpacity;
+    while (offset < pixelLen) {
+      var alpha = pixels[offset + 3] / 256;
+      var gradientOffset = Math.floor(alpha * (GRADIENT_LEVELS - 1)) * 4;
+      // Simple optimize to ignore the empty data
+      if (alpha > 0) {
+        var gradient = isInRange(alpha) ? gradientInRange : gradientOutOfRange;
+        // Any alpha > 0 will be mapped to [minOpacity, maxOpacity]
+        alpha > 0 && (alpha = alpha * diffOpacity + minOpacity);
+        pixels[offset++] = gradient[gradientOffset];
+        pixels[offset++] = gradient[gradientOffset + 1];
+        pixels[offset++] = gradient[gradientOffset + 2];
+        pixels[offset++] = gradient[gradientOffset + 3] * alpha * 256;
+      } else {
+        offset += 4;
+      }
+    }
+    ctx.putImageData(imageData, 0, 0);
+    return canvas;
+  };
+  /**
+   * get canvas of a black circle brush used for canvas to draw later
+   */
+  HeatmapLayer.prototype._getBrush = function () {
+    var brushCanvas = this._brushCanvas || (this._brushCanvas = platformApi.createCanvas());
+    // set brush size
+    var r = this.pointSize + this.blurSize;
+    var d = r * 2;
+    brushCanvas.width = d;
+    brushCanvas.height = d;
+    var ctx = brushCanvas.getContext('2d');
+    ctx.clearRect(0, 0, d, d);
+    // in order to render shadow without the distinct circle,
+    // draw the distinct circle in an invisible place,
+    // and use shadowOffset to draw shadow in the center of the canvas
+    ctx.shadowOffsetX = d;
+    ctx.shadowBlur = this.blurSize;
+    // draw the shadow in black, and use alpha and shadow blur to generate
+    // color in color map
+    ctx.shadowColor = '#000';
+    // draw circle in the left to the canvas
+    ctx.beginPath();
+    ctx.arc(-r, r, this.pointSize, 0, Math.PI * 2, true);
+    ctx.closePath();
+    ctx.fill();
+    return brushCanvas;
+  };
+  /**
+   * get gradient color map
+   * @private
+   */
+  HeatmapLayer.prototype._getGradient = function (colorFunc, state) {
+    var gradientPixels = this._gradientPixels;
+    var pixelsSingleState = gradientPixels[state] || (gradientPixels[state] = new Uint8ClampedArray(256 * 4));
+    var color = [0, 0, 0, 0];
+    var off = 0;
+    for (var i = 0; i < 256; i++) {
+      colorFunc[state](i / 255, true, color);
+      pixelsSingleState[off++] = color[0];
+      pixelsSingleState[off++] = color[1];
+      pixelsSingleState[off++] = color[2];
+      pixelsSingleState[off++] = color[3];
+    }
+    return pixelsSingleState;
+  };
+  return HeatmapLayer;
+}();
+export default HeatmapLayer;

frontend/node_modules/echarts/lib/chart/heatmap/HeatmapSeries.js

@@ -0,0 +1,89 @@
+
+/*
+* Licensed to the Apache Software Foundation (ASF) under one
+* or more contributor license agreements.  See the NOTICE file
+* distributed with this work for additional information
+* regarding copyright ownership.  The ASF licenses this file
+* to you under the Apache License, Version 2.0 (the
+* "License"); you may not use this file except in compliance
+* with the License.  You may obtain a copy of the License at
+*
+*   http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing,
+* software distributed under the License is distributed on an
+* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+* KIND, either express or implied.  See the License for the
+* specific language governing permissions and limitations
+* under the License.
+*/
+
+
+/**
+ * AUTO-GENERATED FILE. DO NOT MODIFY.
+ */
+
+/*
+* Licensed to the Apache Software Foundation (ASF) under one
+* or more contributor license agreements.  See the NOTICE file
+* distributed with this work for additional information
+* regarding copyright ownership.  The ASF licenses this file
+* to you under the Apache License, Version 2.0 (the
+* "License"); you may not use this file except in compliance
+* with the License.  You may obtain a copy of the License at
+*
+*   http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing,
+* software distributed under the License is distributed on an
+* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+* KIND, either express or implied.  See the License for the
+* specific language governing permissions and limitations
+* under the License.
+*/
+import { __extends } from "tslib";
+import SeriesModel from '../../model/Series.js';
+import createSeriesData from '../helper/createSeriesData.js';
+import CoordinateSystem from '../../core/CoordinateSystem.js';
+var HeatmapSeriesModel = /** @class */function (_super) {
+  __extends(HeatmapSeriesModel, _super);
+  function HeatmapSeriesModel() {
+    var _this = _super !== null && _super.apply(this, arguments) || this;
+    _this.type = HeatmapSeriesModel.type;
+    return _this;
+  }
+  HeatmapSeriesModel.prototype.getInitialData = function (option, ecModel) {
+    return createSeriesData(null, this, {
+      generateCoord: 'value'
+    });
+  };
+  HeatmapSeriesModel.prototype.preventIncremental = function () {
+    var coordSysCreator = CoordinateSystem.get(this.get('coordinateSystem'));
+    if (coordSysCreator && coordSysCreator.dimensions) {
+      return coordSysCreator.dimensions[0] === 'lng' && coordSysCreator.dimensions[1] === 'lat';
+    }
+  };
+  HeatmapSeriesModel.type = 'series.heatmap';
+  HeatmapSeriesModel.dependencies = ['grid', 'geo', 'calendar'];
+  HeatmapSeriesModel.defaultOption = {
+    coordinateSystem: 'cartesian2d',
+    // zlevel: 0,
+    z: 2,
+    // Cartesian coordinate system
+    // xAxisIndex: 0,
+    // yAxisIndex: 0,
+    // Geo coordinate system
+    geoIndex: 0,
+    blurSize: 30,
+    pointSize: 20,
+    maxOpacity: 1,
+    minOpacity: 0,
+    select: {
+      itemStyle: {
+        borderColor: '#212121'
+      }
+    }
+  };
+  return HeatmapSeriesModel;
+}(SeriesModel);
+export default HeatmapSeriesModel;

frontend/node_modules/echarts/lib/chart/heatmap/HeatmapView.js

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+
+/*
+* Licensed to the Apache Software Foundation (ASF) under one
+* or more contributor license agreements.  See the NOTICE file
+* distributed with this work for additional information
+* regarding copyright ownership.  The ASF licenses this file
+* to you under the Apache License, Version 2.0 (the
+* "License"); you may not use this file except in compliance
+* with the License.  You may obtain a copy of the License at
+*
+*   http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing,
+* software distributed under the License is distributed on an
+* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+* KIND, either express or implied.  See the License for the
+* specific language governing permissions and limitations
+* under the License.
+*/
+
+
+/**
+ * AUTO-GENERATED FILE. DO NOT MODIFY.
+ */
+
+/*
+* Licensed to the Apache Software Foundation (ASF) under one
+* or more contributor license agreements.  See the NOTICE file
+* distributed with this work for additional information
+* regarding copyright ownership.  The ASF licenses this file
+* to you under the Apache License, Version 2.0 (the
+* "License"); you may not use this file except in compliance
+* with the License.  You may obtain a copy of the License at
+*
+*   http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing,
+* software distributed under the License is distributed on an
+* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+* KIND, either express or implied.  See the License for the
+* specific language governing permissions and limitations
+* under the License.
+*/
+import { __extends } from "tslib";
+import * as graphic from '../../util/graphic.js';
+import { toggleHoverEmphasis } from '../../util/states.js';
+import HeatmapLayer from './HeatmapLayer.js';
+import * as zrUtil from 'zrender/lib/core/util.js';
+import ChartView from '../../view/Chart.js';
+import { isCoordinateSystemType } from '../../coord/CoordinateSystem.js';
+import { setLabelStyle, getLabelStatesModels } from '../../label/labelStyle.js';
+function getIsInPiecewiseRange(dataExtent, pieceList, selected) {
+  var dataSpan = dataExtent[1] - dataExtent[0];
+  pieceList = zrUtil.map(pieceList, function (piece) {
+    return {
+      interval: [(piece.interval[0] - dataExtent[0]) / dataSpan, (piece.interval[1] - dataExtent[0]) / dataSpan]
+    };
+  });
+  var len = pieceList.length;
+  var lastIndex = 0;
+  return function (val) {
+    var i;
+    // Try to find in the location of the last found
+    for (i = lastIndex; i < len; i++) {
+      var interval = pieceList[i].interval;
+      if (interval[0] <= val && val <= interval[1]) {
+        lastIndex = i;
+        break;
+      }
+    }
+    if (i === len) {
+      // Not found, back interation
+      for (i = lastIndex - 1; i >= 0; i--) {
+        var interval = pieceList[i].interval;
+        if (interval[0] <= val && val <= interval[1]) {
+          lastIndex = i;
+          break;
+        }
+      }
+    }
+    return i >= 0 && i < len && selected[i];
+  };
+}
+function getIsInContinuousRange(dataExtent, range) {
+  var dataSpan = dataExtent[1] - dataExtent[0];
+  range = [(range[0] - dataExtent[0]) / dataSpan, (range[1] - dataExtent[0]) / dataSpan];
+  return function (val) {
+    return val >= range[0] && val <= range[1];
+  };
+}
+function isGeoCoordSys(coordSys) {
+  var dimensions = coordSys.dimensions;
+  // Not use coordSys.type === 'geo' because coordSys maybe extended
+  return dimensions[0] === 'lng' && dimensions[1] === 'lat';
+}
+var HeatmapView = /** @class */function (_super) {
+  __extends(HeatmapView, _super);
+  function HeatmapView() {
+    var _this = _super !== null && _super.apply(this, arguments) || this;
+    _this.type = HeatmapView.type;
+    return _this;
+  }
+  HeatmapView.prototype.render = function (seriesModel, ecModel, api) {
+    var visualMapOfThisSeries;
+    ecModel.eachComponent('visualMap', function (visualMap) {
+      visualMap.eachTargetSeries(function (targetSeries) {
+        if (targetSeries === seriesModel) {
+          visualMapOfThisSeries = visualMap;
+        }
+      });
+    });
+    if (process.env.NODE_ENV !== 'production') {
+      if (!visualMapOfThisSeries) {
+        throw new Error('Heatmap must use with visualMap');
+      }
+    }
+    // Clear previously rendered progressive elements.
+    this._progressiveEls = null;
+    this.group.removeAll();
+    var coordSys = seriesModel.coordinateSystem;
+    if (coordSys.type === 'cartesian2d' || coordSys.type === 'calendar') {
+      this._renderOnCartesianAndCalendar(seriesModel, api, 0, seriesModel.getData().count());
+    } else if (isGeoCoordSys(coordSys)) {
+      this._renderOnGeo(coordSys, seriesModel, visualMapOfThisSeries, api);
+    }
+  };
+  HeatmapView.prototype.incrementalPrepareRender = function (seriesModel, ecModel, api) {
+    this.group.removeAll();
+  };
+  HeatmapView.prototype.incrementalRender = function (params, seriesModel, ecModel, api) {
+    var coordSys = seriesModel.coordinateSystem;
+    if (coordSys) {
+      // geo does not support incremental rendering?
+      if (isGeoCoordSys(coordSys)) {
+        this.render(seriesModel, ecModel, api);
+      } else {
+        this._progressiveEls = [];
+        this._renderOnCartesianAndCalendar(seriesModel, api, params.start, params.end, true);
+      }
+    }
+  };
+  HeatmapView.prototype.eachRendered = function (cb) {
+    graphic.traverseElements(this._progressiveEls || this.group, cb);
+  };
+  HeatmapView.prototype._renderOnCartesianAndCalendar = function (seriesModel, api, start, end, incremental) {
+    var coordSys = seriesModel.coordinateSystem;
+    var isCartesian2d = isCoordinateSystemType(coordSys, 'cartesian2d');
+    var width;
+    var height;
+    var xAxisExtent;
+    var yAxisExtent;
+    if (isCartesian2d) {
+      var xAxis = coordSys.getAxis('x');
+      var yAxis = coordSys.getAxis('y');
+      if (process.env.NODE_ENV !== 'production') {
+        if (!(xAxis.type === 'category' && yAxis.type === 'category')) {
+          throw new Error('Heatmap on cartesian must have two category axes');
+        }
+        if (!(xAxis.onBand && yAxis.onBand)) {
+          throw new Error('Heatmap on cartesian must have two axes with boundaryGap true');
+        }
+      }
+      // add 0.5px to avoid the gaps
+      width = xAxis.getBandWidth() + .5;
+      height = yAxis.getBandWidth() + .5;
+      xAxisExtent = xAxis.scale.getExtent();
+      yAxisExtent = yAxis.scale.getExtent();
+    }
+    var group = this.group;
+    var data = seriesModel.getData();
+    var emphasisStyle = seriesModel.getModel(['emphasis', 'itemStyle']).getItemStyle();
+    var blurStyle = seriesModel.getModel(['blur', 'itemStyle']).getItemStyle();
+    var selectStyle = seriesModel.getModel(['select', 'itemStyle']).getItemStyle();
+    var borderRadius = seriesModel.get(['itemStyle', 'borderRadius']);
+    var labelStatesModels = getLabelStatesModels(seriesModel);
+    var emphasisModel = seriesModel.getModel('emphasis');
+    var focus = emphasisModel.get('focus');
+    var blurScope = emphasisModel.get('blurScope');
+    var emphasisDisabled = emphasisModel.get('disabled');
+    var dataDims = isCartesian2d ? [data.mapDimension('x'), data.mapDimension('y'), data.mapDimension('value')] : [data.mapDimension('time'), data.mapDimension('value')];
+    for (var idx = start; idx < end; idx++) {
+      var rect = void 0;
+      var style = data.getItemVisual(idx, 'style');
+      if (isCartesian2d) {
+        var dataDimX = data.get(dataDims[0], idx);
+        var dataDimY = data.get(dataDims[1], idx);
+        // Ignore empty data and out of extent data
+        if (isNaN(data.get(dataDims[2], idx)) || isNaN(dataDimX) || isNaN(dataDimY) || dataDimX < xAxisExtent[0] || dataDimX > xAxisExtent[1] || dataDimY < yAxisExtent[0] || dataDimY > yAxisExtent[1]) {
+          continue;
+        }
+        var point = coordSys.dataToPoint([dataDimX, dataDimY]);
+        rect = new graphic.Rect({
+          shape: {
+            x: point[0] - width / 2,
+            y: point[1] - height / 2,
+            width: width,
+            height: height
+          },
+          style: style
+        });
+      } else {
+        // Ignore empty data
+        if (isNaN(data.get(dataDims[1], idx))) {
+          continue;
+        }
+        rect = new graphic.Rect({
+          z2: 1,
+          shape: coordSys.dataToRect([data.get(dataDims[0], idx)]).contentShape,
+          style: style
+        });
+      }
+      // Optimization for large dataset
+      if (data.hasItemOption) {
+        var itemModel = data.getItemModel(idx);
+        var emphasisModel_1 = itemModel.getModel('emphasis');
+        emphasisStyle = emphasisModel_1.getModel('itemStyle').getItemStyle();
+        blurStyle = itemModel.getModel(['blur', 'itemStyle']).getItemStyle();
+        selectStyle = itemModel.getModel(['select', 'itemStyle']).getItemStyle();
+        // Each item value struct in the data would be firstly
+        // {
+        //     itemStyle: { borderRadius: [30, 30] },
+        //     value: [2022, 02, 22]
+        // }
+        borderRadius = itemModel.get(['itemStyle', 'borderRadius']);
+        focus = emphasisModel_1.get('focus');
+        blurScope = emphasisModel_1.get('blurScope');
+        emphasisDisabled = emphasisModel_1.get('disabled');
+        labelStatesModels = getLabelStatesModels(itemModel);
+      }
+      rect.shape.r = borderRadius;
+      var rawValue = seriesModel.getRawValue(idx);
+      var defaultText = '-';
+      if (rawValue && rawValue[2] != null) {
+        defaultText = rawValue[2] + '';
+      }
+      setLabelStyle(rect, labelStatesModels, {
+        labelFetcher: seriesModel,
+        labelDataIndex: idx,
+        defaultOpacity: style.opacity,
+        defaultText: defaultText
+      });
+      rect.ensureState('emphasis').style = emphasisStyle;
+      rect.ensureState('blur').style = blurStyle;
+      rect.ensureState('select').style = selectStyle;
+      toggleHoverEmphasis(rect, focus, blurScope, emphasisDisabled);
+      rect.incremental = incremental;
+      // PENDING
+      if (incremental) {
+        // Rect must use hover layer if it's incremental.
+        rect.states.emphasis.hoverLayer = true;
+      }
+      group.add(rect);
+      data.setItemGraphicEl(idx, rect);
+      if (this._progressiveEls) {
+        this._progressiveEls.push(rect);
+      }
+    }
+  };
+  HeatmapView.prototype._renderOnGeo = function (geo, seriesModel, visualMapModel, api) {
+    var inRangeVisuals = visualMapModel.targetVisuals.inRange;
+    var outOfRangeVisuals = visualMapModel.targetVisuals.outOfRange;
+    // if (!visualMapping) {
+    //     throw new Error('Data range must have color visuals');
+    // }
+    var data = seriesModel.getData();
+    var hmLayer = this._hmLayer || this._hmLayer || new HeatmapLayer();
+    hmLayer.blurSize = seriesModel.get('blurSize');
+    hmLayer.pointSize = seriesModel.get('pointSize');
+    hmLayer.minOpacity = seriesModel.get('minOpacity');
+    hmLayer.maxOpacity = seriesModel.get('maxOpacity');
+    var rect = geo.getViewRect().clone();
+    var roamTransform = geo.getRoamTransform();
+    rect.applyTransform(roamTransform);
+    // Clamp on viewport
+    var x = Math.max(rect.x, 0);
+    var y = Math.max(rect.y, 0);
+    var x2 = Math.min(rect.width + rect.x, api.getWidth());
+    var y2 = Math.min(rect.height + rect.y, api.getHeight());
+    var width = x2 - x;
+    var height = y2 - y;
+    var dims = [data.mapDimension('lng'), data.mapDimension('lat'), data.mapDimension('value')];
+    var points = data.mapArray(dims, function (lng, lat, value) {
+      var pt = geo.dataToPoint([lng, lat]);
+      pt[0] -= x;
+      pt[1] -= y;
+      pt.push(value);
+      return pt;
+    });
+    var dataExtent = visualMapModel.getExtent();
+    var isInRange = visualMapModel.type === 'visualMap.continuous' ? getIsInContinuousRange(dataExtent, visualMapModel.option.range) : getIsInPiecewiseRange(dataExtent, visualMapModel.getPieceList(), visualMapModel.option.selected);
+    hmLayer.update(points, width, height, inRangeVisuals.color.getNormalizer(), {
+      inRange: inRangeVisuals.color.getColorMapper(),
+      outOfRange: outOfRangeVisuals.color.getColorMapper()
+    }, isInRange);
+    var img = new graphic.Image({
+      style: {
+        width: width,
+        height: height,
+        x: x,
+        y: y,
+        image: hmLayer.canvas
+      },
+      silent: true
+    });
+    this.group.add(img);
+  };
+  HeatmapView.type = 'heatmap';
+  return HeatmapView;
+}(ChartView);
+export default HeatmapView;

frontend/node_modules/echarts/lib/chart/heatmap/install.js

@@ -0,0 +1,49 @@
+
+/*
+* Licensed to the Apache Software Foundation (ASF) under one
+* or more contributor license agreements.  See the NOTICE file
+* distributed with this work for additional information
+* regarding copyright ownership.  The ASF licenses this file
+* to you under the Apache License, Version 2.0 (the
+* "License"); you may not use this file except in compliance
+* with the License.  You may obtain a copy of the License at
+*
+*   http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing,
+* software distributed under the License is distributed on an
+* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+* KIND, either express or implied.  See the License for the
+* specific language governing permissions and limitations
+* under the License.
+*/
+
+
+/**
+ * AUTO-GENERATED FILE. DO NOT MODIFY.
+ */
+
+/*
+* Licensed to the Apache Software Foundation (ASF) under one
+* or more contributor license agreements.  See the NOTICE file
+* distributed with this work for additional information
+* regarding copyright ownership.  The ASF licenses this file
+* to you under the Apache License, Version 2.0 (the
+* "License"); you may not use this file except in compliance
+* with the License.  You may obtain a copy of the License at
+*
+*   http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing,
+* software distributed under the License is distributed on an
+* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+* KIND, either express or implied.  See the License for the
+* specific language governing permissions and limitations
+* under the License.
+*/
+import HeatmapView from './HeatmapView.js';
+import HeatmapSeriesModel from './HeatmapSeries.js';
+export function install(registers) {
+  registers.registerChartView(HeatmapView);
+  registers.registerSeriesModel(HeatmapSeriesModel);
+}