project/node_modules/echarts/lib/label/sectorLabel.js

/*
* 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 { calculateTextPosition } from 'zrender/lib/contain/text.js';
import { isArray, isNumber } from 'zrender/lib/core/util.js';
export function createSectorCalculateTextPosition(positionMapping, opts) {
  opts = opts || {};
  var isRoundCap = opts.isRoundCap;
  return function (out, opts, boundingRect) {
    var textPosition = opts.position;
    if (!textPosition || textPosition instanceof Array) {
      return calculateTextPosition(out, opts, boundingRect);
    }
    var mappedSectorPosition = positionMapping(textPosition);
    var distance = opts.distance != null ? opts.distance : 5;
    var sector = this.shape;
    var cx = sector.cx;
    var cy = sector.cy;
    var r = sector.r;
    var r0 = sector.r0;
    var middleR = (r + r0) / 2;
    var startAngle = sector.startAngle;
    var endAngle = sector.endAngle;
    var middleAngle = (startAngle + endAngle) / 2;
    var extraDist = isRoundCap ? Math.abs(r - r0) / 2 : 0;
    var mathCos = Math.cos;
    var mathSin = Math.sin;
    // base position: top-left
    var x = cx + r * mathCos(startAngle);
    var y = cy + r * mathSin(startAngle);
    var textAlign = 'left';
    var textVerticalAlign = 'top';
    switch (mappedSectorPosition) {
      case 'startArc':
        x = cx + (r0 - distance) * mathCos(middleAngle);
        y = cy + (r0 - distance) * mathSin(middleAngle);
        textAlign = 'center';
        textVerticalAlign = 'top';
        break;
      case 'insideStartArc':
        x = cx + (r0 + distance) * mathCos(middleAngle);
        y = cy + (r0 + distance) * mathSin(middleAngle);
        textAlign = 'center';
        textVerticalAlign = 'bottom';
        break;
      case 'startAngle':
        x = cx + middleR * mathCos(startAngle) + adjustAngleDistanceX(startAngle, distance + extraDist, false);
        y = cy + middleR * mathSin(startAngle) + adjustAngleDistanceY(startAngle, distance + extraDist, false);
        textAlign = 'right';
        textVerticalAlign = 'middle';
        break;
      case 'insideStartAngle':
        x = cx + middleR * mathCos(startAngle) + adjustAngleDistanceX(startAngle, -distance + extraDist, false);
        y = cy + middleR * mathSin(startAngle) + adjustAngleDistanceY(startAngle, -distance + extraDist, false);
        textAlign = 'left';
        textVerticalAlign = 'middle';
        break;
      case 'middle':
        x = cx + middleR * mathCos(middleAngle);
        y = cy + middleR * mathSin(middleAngle);
        textAlign = 'center';
        textVerticalAlign = 'middle';
        break;
      case 'endArc':
        x = cx + (r + distance) * mathCos(middleAngle);
        y = cy + (r + distance) * mathSin(middleAngle);
        textAlign = 'center';
        textVerticalAlign = 'bottom';
        break;
      case 'insideEndArc':
        x = cx + (r - distance) * mathCos(middleAngle);
        y = cy + (r - distance) * mathSin(middleAngle);
        textAlign = 'center';
        textVerticalAlign = 'top';
        break;
      case 'endAngle':
        x = cx + middleR * mathCos(endAngle) + adjustAngleDistanceX(endAngle, distance + extraDist, true);
        y = cy + middleR * mathSin(endAngle) + adjustAngleDistanceY(endAngle, distance + extraDist, true);
        textAlign = 'left';
        textVerticalAlign = 'middle';
        break;
      case 'insideEndAngle':
        x = cx + middleR * mathCos(endAngle) + adjustAngleDistanceX(endAngle, -distance + extraDist, true);
        y = cy + middleR * mathSin(endAngle) + adjustAngleDistanceY(endAngle, -distance + extraDist, true);
        textAlign = 'right';
        textVerticalAlign = 'middle';
        break;
      default:
        return calculateTextPosition(out, opts, boundingRect);
    }
    out = out || {};
    out.x = x;
    out.y = y;
    out.align = textAlign;
    out.verticalAlign = textVerticalAlign;
    return out;
  };
}
export function setSectorTextRotation(sector, textPosition, positionMapping, rotateType) {
  if (isNumber(rotateType)) {
    // user-set rotation
    sector.setTextConfig({
      rotation: rotateType
    });
    return;
  } else if (isArray(textPosition)) {
    // user-set position, use 0 as auto rotation
    sector.setTextConfig({
      rotation: 0
    });
    return;
  }
  var shape = sector.shape;
  var startAngle = shape.clockwise ? shape.startAngle : shape.endAngle;
  var endAngle = shape.clockwise ? shape.endAngle : shape.startAngle;
  var middleAngle = (startAngle + endAngle) / 2;
  var anchorAngle;
  var mappedSectorPosition = positionMapping(textPosition);
  switch (mappedSectorPosition) {
    case 'startArc':
    case 'insideStartArc':
    case 'middle':
    case 'insideEndArc':
    case 'endArc':
      anchorAngle = middleAngle;
      break;
    case 'startAngle':
    case 'insideStartAngle':
      anchorAngle = startAngle;
      break;
    case 'endAngle':
    case 'insideEndAngle':
      anchorAngle = endAngle;
      break;
    default:
      sector.setTextConfig({
        rotation: 0
      });
      return;
  }
  var rotate = Math.PI * 1.5 - anchorAngle;
  /**
   * TODO: labels with rotate > Math.PI / 2 should be rotate another
   * half round flipped to increase readability. However, only middle
   * position supports this for now, because in other positions, the
   * anchor point is not at the center of the text, so the positions
   * after rotating is not as expected.
   */
  if (mappedSectorPosition === 'middle' && rotate > Math.PI / 2 && rotate < Math.PI * 1.5) {
    rotate -= Math.PI;
  }
  sector.setTextConfig({
    rotation: rotate
  });
}
function adjustAngleDistanceX(angle, distance, isEnd) {
  return distance * Math.sin(angle) * (isEnd ? -1 : 1);
}
function adjustAngleDistanceY(angle, distance, isEnd) {
  return distance * Math.cos(angle) * (isEnd ? 1 : -1);
}