kepler.gl
Version:
kepler.gl is a webgl based application to visualize large scale location data in the browser
149 lines (143 loc) • 23.4 kB
JavaScript
;
var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
var _typeof = require("@babel/runtime/helpers/typeof");
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.getArrowTextVector = exports.formatTextLabelData = exports.defaultPadding = void 0;
exports.getTextOffsetByRadius = getTextOffsetByRadius;
exports.textLabelAccessor = void 0;
var arrow = _interopRequireWildcard(require("apache-arrow"));
var _viewportMercatorProject = require("viewport-mercator-project");
var _utils = require("@kepler.gl/utils");
var _commonUtils = require("@kepler.gl/common-utils");
var _lodash = _interopRequireDefault(require("lodash.uniq"));
function _getRequireWildcardCache(e) { if ("function" != typeof WeakMap) return null; var r = new WeakMap(), t = new WeakMap(); return (_getRequireWildcardCache = function _getRequireWildcardCache(e) { return e ? t : r; })(e); }
function _interopRequireWildcard(e, r) { if (!r && e && e.__esModule) return e; if (null === e || "object" != _typeof(e) && "function" != typeof e) return { "default": e }; var t = _getRequireWildcardCache(r); if (t && t.has(e)) return t.get(e); var n = { __proto__: null }, a = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var u in e) if ("default" !== u && {}.hasOwnProperty.call(e, u)) { var i = a ? Object.getOwnPropertyDescriptor(e, u) : null; i && (i.get || i.set) ? Object.defineProperty(n, u, i) : n[u] = e[u]; } return n["default"] = e, t && t.set(e, n), n; }
// SPDX-License-Identifier: MIT
// Copyright contributors to the kepler.gl project
var defaultPadding = exports.defaultPadding = 20;
function getTextOffsetByRadius(radiusScale, getRadius, mapState) {
return function (textLabel) {
var distanceScale = (0, _viewportMercatorProject.getDistanceScales)(mapState);
var xMult = textLabel.anchor === 'middle' ? 0 : textLabel.anchor === 'start' ? 1 : -1;
var yMult = textLabel.alignment === 'center' ? 0 : textLabel.alignment === 'bottom' ? 1 : -1;
var sizeOffset = textLabel.alignment === 'center' ? 0 : textLabel.alignment === 'bottom' ? textLabel.size : textLabel.size;
var pixelRadius = radiusScale * distanceScale.pixelsPerMeter[0];
var padding = defaultPadding;
return typeof getRadius === 'function' ? function (d) {
return [xMult * (getRadius(d) * pixelRadius + padding), yMult * (getRadius(d) * pixelRadius + padding + sizeOffset)];
} : [xMult * (getRadius * pixelRadius + padding), yMult * (getRadius * pixelRadius + padding + sizeOffset)];
};
}
// eslint-disable-next-line @typescript-eslint/no-unused-vars
var textLabelAccessor = exports.textLabelAccessor = function textLabelAccessor(textLabel) {
return function (dc) {
return function (d) {
var val = textLabel.field.valueAccessor(d);
return (0, _commonUtils.notNullorUndefined)(val) ? String(val) : '';
};
};
};
var formatTextLabelData = exports.formatTextLabelData = function formatTextLabelData(_ref) {
var textLabel = _ref.textLabel,
triggerChanged = _ref.triggerChanged,
oldLayerData = _ref.oldLayerData,
data = _ref.data,
dataContainer = _ref.dataContainer,
filteredIndex = _ref.filteredIndex;
return textLabel.map(function (tl, i) {
if (!tl.field) {
// if no field selected,
return {
getText: null,
characterSet: []
};
}
var getTextAccessor = textLabelAccessor(tl)(dataContainer);
var characterSet;
var getText = getTextAccessor;
var rebuildArrowTextVector = true;
if (!(triggerChanged !== null && triggerChanged !== void 0 && triggerChanged["getLabelCharacterSet-".concat(i)]) && oldLayerData && oldLayerData.textLabels && oldLayerData.textLabels[i]) {
characterSet = oldLayerData.textLabels[i].characterSet;
getText = oldLayerData.textLabels[i].getText;
rebuildArrowTextVector = false;
} else {
if (data instanceof arrow.Table) {
// we don't filter out arrow tables,
// so we use filteredIndex array instead
var allLabels = [];
if (tl.field) {
if (filteredIndex) {
filteredIndex.forEach(function (value, index) {
if (value > 0) allLabels.push(getTextAccessor({
index: index
}));
});
} else {
for (var index = 0; index < dataContainer.numRows(); ++index) {
allLabels.push(getTextAccessor({
index: index
}));
}
}
}
characterSet = (0, _lodash["default"])(allLabels.join(''));
} else {
var _allLabels = tl.field ? data.map(getTextAccessor) : [];
characterSet = (0, _lodash["default"])(_allLabels.join(''));
}
}
// For Arrow Layers getText has to be an arrow vector.
// For now check here for ArrowTable, not ArrowDataContainer.
if (rebuildArrowTextVector && data instanceof arrow.Table && dataContainer instanceof _utils.ArrowDataContainer) {
getText = dataContainer.getColumn(tl.field.fieldIdx);
try {
getText = getArrowTextVector(getText, getTextAccessor);
} catch (error) {
// empty text labels
getText = getArrowTextVector(getText, function () {
return ' ';
});
}
}
return {
characterSet: characterSet,
getText: getText
};
});
};
/**
* Get an arrow vector suitable to render text labels with arrow layers.
* @param getText A candidate arrow vector to use for text labels.
* @param getTextAccessor Text label accessor.
*/
var getArrowTextVector = exports.getArrowTextVector = function getArrowTextVector(candidateTextVector, getTextAccessor) {
// if the passed vector is suitable for text labels
if (arrow.DataType.isUtf8(candidateTextVector === null || candidateTextVector === void 0 ? void 0 : candidateTextVector.type)) {
return candidateTextVector;
}
// create utf8 vector from source vector with the same number of batches.
// @ts-expect-error
var offsets = candidateTextVector._offsets;
var numOffsets = offsets.length;
var batchVectors = [];
var datum = {
index: 0
};
for (var batchIndex = 0; batchIndex < numOffsets - 1; batchIndex++) {
var batchStart = offsets[batchIndex];
var batchEnd = offsets[batchIndex + 1];
var batchLabels = [];
for (var rowIndex = batchStart; rowIndex < batchEnd; ++rowIndex) {
datum.index = rowIndex;
batchLabels.push(getTextAccessor(datum));
}
batchVectors.push(arrow.vectorFromArray(batchLabels, new arrow.Utf8()));
}
var input = batchVectors.flatMap(function (x) {
return x.data;
}).flat(Number.POSITIVE_INFINITY);
return new arrow.Vector(input);
};
//# sourceMappingURL=data:application/json;charset=utf-8;base64,{"version":3,"names":["arrow","_interopRequireWildcard","require","_viewportMercatorProject","_utils","_commonUtils","_lodash","_interopRequireDefault","_getRequireWildcardCache","e","WeakMap","r","t","__esModule","_typeof","has","get","n","__proto__","a","Object","defineProperty","getOwnPropertyDescriptor","u","hasOwnProperty","call","i","set","defaultPadding","exports","getTextOffsetByRadius","radiusScale","getRadius","mapState","textLabel","distanceScale","getDistanceScales","xMult","anchor","yMult","alignment","sizeOffset","size","pixelRadius","pixelsPerMeter","padding","d","textLabelAccessor","dc","val","field","valueAccessor","notNullorUndefined","String","formatTextLabelData","_ref","triggerChanged","oldLayerData","data","dataContainer","filteredIndex","map","tl","getText","characterSet","getTextAccessor","rebuildArrowTextVector","concat","textLabels","Table","allLabels","forEach","value","index","push","numRows","uniq","join","ArrowDataContainer","getColumn","fieldIdx","getArrowTextVector","error","candidateTextVector","DataType","isUtf8","type","offsets","_offsets","numOffsets","length","batchVectors","datum","batchIndex","batchStart","batchEnd","batchLabels","rowIndex","vectorFromArray","Utf8","input","flatMap","x","flat","Number","POSITIVE_INFINITY","Vector"],"sources":["../src/layer-text-label.ts"],"sourcesContent":["// SPDX-License-Identifier: MIT\n// Copyright contributors to the kepler.gl project\n\nimport * as arrow from 'apache-arrow';\nimport {getDistanceScales} from 'viewport-mercator-project';\nimport {DataContainerInterface, ArrowDataContainer} from '@kepler.gl/utils';\nimport {notNullorUndefined} from '@kepler.gl/common-utils';\nimport uniq from 'lodash.uniq';\n\nexport const defaultPadding = 20;\n\nexport function getTextOffsetByRadius(radiusScale, getRadius, mapState) {\n  return textLabel => {\n    const distanceScale = getDistanceScales(mapState);\n    const xMult = textLabel.anchor === 'middle' ? 0 : textLabel.anchor === 'start' ? 1 : -1;\n    const yMult = textLabel.alignment === 'center' ? 0 : textLabel.alignment === 'bottom' ? 1 : -1;\n\n    const sizeOffset =\n      textLabel.alignment === 'center'\n        ? 0\n        : textLabel.alignment === 'bottom'\n        ? textLabel.size\n        : textLabel.size;\n\n    const pixelRadius = radiusScale * distanceScale.pixelsPerMeter[0];\n    const padding = defaultPadding;\n\n    return typeof getRadius === 'function'\n      ? d => [\n          xMult * (getRadius(d) * pixelRadius + padding),\n          yMult * (getRadius(d) * pixelRadius + padding + sizeOffset)\n        ]\n      : [\n          xMult * (getRadius * pixelRadius + padding),\n          yMult * (getRadius * pixelRadius + padding + sizeOffset)\n        ];\n  };\n}\n\n// eslint-disable-next-line @typescript-eslint/no-unused-vars\nexport const textLabelAccessor = textLabel => dc => d => {\n  const val = textLabel.field.valueAccessor(d);\n  return notNullorUndefined(val) ? String(val) : '';\n};\n\nexport const formatTextLabelData = ({\n  textLabel,\n  triggerChanged,\n  oldLayerData,\n  data,\n  dataContainer,\n  filteredIndex\n}: {\n  textLabel: any;\n  triggerChanged?: boolean | {[key: string]: boolean};\n  oldLayerData: any;\n  data: any;\n  dataContainer: DataContainerInterface;\n  filteredIndex?: Uint8ClampedArray | null;\n}) => {\n  return textLabel.map((tl, i) => {\n    if (!tl.field) {\n      // if no field selected,\n      return {\n        getText: null,\n        characterSet: []\n      };\n    }\n\n    const getTextAccessor: (d: {index: number}) => string = textLabelAccessor(tl)(dataContainer);\n    let characterSet;\n    let getText: typeof getTextAccessor | arrow.Vector = getTextAccessor;\n\n    let rebuildArrowTextVector = true;\n    if (\n      !triggerChanged?.[`getLabelCharacterSet-${i}`] &&\n      oldLayerData &&\n      oldLayerData.textLabels &&\n      oldLayerData.textLabels[i]\n    ) {\n      characterSet = oldLayerData.textLabels[i].characterSet;\n      getText = oldLayerData.textLabels[i].getText;\n      rebuildArrowTextVector = false;\n    } else {\n      if (data instanceof arrow.Table) {\n        // we don't filter out arrow tables,\n        // so we use filteredIndex array instead\n        const allLabels: string[] = [];\n        if (tl.field) {\n          if (filteredIndex) {\n            filteredIndex.forEach((value, index) => {\n              if (value > 0) allLabels.push(getTextAccessor({index}));\n            });\n          } else {\n            for (let index = 0; index < dataContainer.numRows(); ++index) {\n              allLabels.push(getTextAccessor({index}));\n            }\n          }\n        }\n        characterSet = uniq(allLabels.join(''));\n      } else {\n        const allLabels = tl.field ? data.map(getTextAccessor) : [];\n        characterSet = uniq(allLabels.join(''));\n      }\n    }\n\n    // For Arrow Layers getText has to be an arrow vector.\n    // For now check here for ArrowTable, not ArrowDataContainer.\n    if (\n      rebuildArrowTextVector &&\n      data instanceof arrow.Table &&\n      dataContainer instanceof ArrowDataContainer\n    ) {\n      getText = dataContainer.getColumn(tl.field.fieldIdx);\n      try {\n        getText = getArrowTextVector(getText as arrow.Vector, getTextAccessor);\n      } catch (error) {\n        // empty text labels\n        getText = getArrowTextVector(getText, () => ' ');\n      }\n    }\n\n    return {\n      characterSet,\n      getText\n    };\n  });\n};\n\n/**\n * Get an arrow vector suitable to render text labels with arrow layers.\n * @param getText A candidate arrow vector to use for text labels.\n * @param getTextAccessor Text label accessor.\n */\nexport const getArrowTextVector = (\n  candidateTextVector: arrow.Vector,\n  getTextAccessor: ({index}: {index: number}) => string\n): arrow.Vector => {\n  // if the passed vector is suitable for text labels\n  if (arrow.DataType.isUtf8(candidateTextVector?.type)) {\n    return candidateTextVector;\n  }\n\n  // create utf8 vector from source vector with the same number of batches.\n  // @ts-expect-error\n  const offsets = candidateTextVector._offsets;\n  const numOffsets = offsets.length;\n  const batchVectors: arrow.Vector[] = [];\n  const datum = {index: 0};\n  for (let batchIndex = 0; batchIndex < numOffsets - 1; batchIndex++) {\n    const batchStart = offsets[batchIndex];\n    const batchEnd = offsets[batchIndex + 1];\n\n    const batchLabels: string[] = [];\n    for (let rowIndex = batchStart; rowIndex < batchEnd; ++rowIndex) {\n      datum.index = rowIndex;\n      batchLabels.push(getTextAccessor(datum));\n    }\n\n    batchVectors.push(arrow.vectorFromArray(batchLabels, new arrow.Utf8()));\n  }\n\n  const input = batchVectors.flatMap(x => x.data).flat(Number.POSITIVE_INFINITY);\n\n  return new 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