kepler.gl/dist/layers/layer-text-label.js

kepler.gl is a webgl based application to visualize large scale location data in the browser

"use strict";

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.getTextOffsetByRadius = getTextOffsetByRadius;
exports.formatTextLabelData = exports.textLabelAccessor = exports.defaultPadding = void 0;

var _viewportMercatorProject = require("viewport-mercator-project");

var _dataUtils = require("../utils/data-utils");

var _lodash = _interopRequireDefault(require("lodash.uniq"));

// Copyright (c) 2021 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.
var defaultPadding = 20;
exports.defaultPadding = defaultPadding;

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)];
  };
}

var textLabelAccessor = function textLabelAccessor(textLabel) {
  return function (dc) {
    return function (d) {
      var val = textLabel.field.valueAccessor(d);
      return (0, _dataUtils.notNullorUndefined)(val) ? String(val) : '';
    };
  };
};

exports.textLabelAccessor = textLabelAccessor;

var formatTextLabelData = function formatTextLabelData(_ref) {
  var textLabel = _ref.textLabel,
      triggerChanged = _ref.triggerChanged,
      oldLayerData = _ref.oldLayerData,
      data = _ref.data,
      dataContainer = _ref.dataContainer;
  return textLabel.map(function (tl, i) {
    if (!tl.field) {
      // if no field selected,
      return {
        getText: null,
        characterSet: []
      };
    }

    var getText = textLabelAccessor(tl)(dataContainer);
    var characterSet;

    if (!triggerChanged["getLabelCharacterSet-".concat(i)] && oldLayerData && oldLayerData.textLabels && oldLayerData.textLabels[i]) {
      characterSet = oldLayerData.textLabels[i].characterSet;
    } else {
      var allLabels = tl.field ? data.map(getText) : [];
      characterSet = (0, _lodash["default"])(allLabels.join(''));
    }

    return {
      characterSet: characterSet,
      getText: getText
    };
  });
};

exports.formatTextLabelData = formatTextLabelData;
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IN NO EVENT SHALL THE\n// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\n// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN\n// THE SOFTWARE.\n\nimport {getDistanceScales} from 'viewport-mercator-project';\nimport {notNullorUndefined} from 'utils/data-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\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}) => {\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 getText = textLabelAccessor(tl)(dataContainer);\n    let characterSet;\n\n    if (\n      !triggerChanged[`getLabelCharacterSet-${i}`] &&\n      oldLayerData &&\n      oldLayerData.textLabels &&\n      oldLayerData.textLabels[i]\n    ) {\n      characterSet = oldLayerData.textLabels[i].characterSet;\n    } else {\n      const allLabels = tl.field ? data.map(getText) : [];\n      characterSet = uniq(allLabels.join(''));\n    }\n\n    return {\n      characterSet,\n      getText\n    };\n  });\n};\n"]}