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{ get, deepMix, isArray } from '@antv/util';\nimport { Writeable } from '../../util/types';\nimport { MappingDatum, Point } from '../../interface';\nimport GeometryLabel from './base';\nimport { LabelCfg, LabelItem, LabelPointCfg, TextAlign } from './interface';\n\n/**\n * 柱状图 label\n */\nexport default class IntervalLabel extends GeometryLabel {\n  /**\n   * 获取 interval label 的方向，取决于 value 的值是正还是负\n   * @param labelCfg\n   */\n  private getLabelValueDir(mappingData: MappingDatum) {\n    // points 中的 x/y 和 transpose 无关\n    const dim = 'y';\n    const { points } = mappingData;\n\n    return points[0][dim] <= points[2][dim] ? 1 : -1;\n  }\n\n  /**\n   * 重载：根据 interval 值的正负来调整 label 偏移量\n   * @param labelCfg\n   * @param index\n   * @param total\n   */\n  protected getLabelOffsetPoint(labelCfg: LabelCfg, index: number, total: number, position?: string) {\n    let point = super.getLabelOffsetPoint(labelCfg, index, total);\n    const coordinate = this.getCoordinate();\n    const transposed = coordinate.isTransposed;\n    const dim = transposed ? 'x' : 'y';\n    const dir = this.getLabelValueDir(labelCfg.mappingData);\n    point = { ...point, [dim]: point[dim] * dir };\n\n    if (coordinate.isReflect('x')) {\n      point = {\n        ...point,\n        x: point.x * -1,\n      };\n    }\n    if (coordinate.isReflect('y')) {\n      point = {\n        ...point,\n        y: point.y * -1,\n      };\n    }\n\n    return point;\n  }\n\n  /**\n   * 重载：定制 interval label 的默认主题配置\n   * @param labelCfg\n   */\n  protected getThemedLabelCfg(labelCfg: LabelCfg) {\n    const geometry = this.geometry;\n    const defaultLabelCfg = this.getDefaultLabelCfg();\n    const { theme } = geometry;\n\n    // 如果 interval label position 设置为 middle，则将主题中的 offset 覆盖为 0\n    return deepMix({}, defaultLabelCfg, theme.labels, labelCfg.position === 'middle' ? { offset: 0 } : {}, labelCfg);\n  }\n\n  protected setLabelPosition(\n    labelPointCfg: Writeable<LabelPointCfg>,\n    mappingData: MappingDatum,\n    index: number,\n    position: string\n  ) {\n    const coordinate = this.getCoordinate();\n    const transposed = coordinate.isTransposed;\n    const shapePoints = mappingData.points as Point[];\n    const point0 = coordinate.convert(shapePoints[0]);\n    const point2 = coordinate.convert(shapePoints[2]);\n    const dir = this.getLabelValueDir(mappingData);\n\n    let top;\n    let right;\n    let bottom;\n    let left;\n\n    const shape = isArray(mappingData.shape) ? mappingData.shape[0] : mappingData.shape;\n    if (shape === 'funnel' || shape === 'pyramid') {\n      // 处理漏斗图\n      const nextPoints = get(mappingData, 'nextPoints');\n      const points = get(mappingData, 'points');\n      if (nextPoints) {\n        // 非漏斗图底部\n        const p0 = coordinate.convert(points[0] as Point);\n        const p1 = coordinate.convert(points[1] as Point);\n        const nextP0 = coordinate.convert(nextPoints[0] as Point);\n        const nextP1 = coordinate.convert(nextPoints[1] as Point);\n\n        // TODO: 使用包围盒的计算方法\n        if (transposed) {\n          top = Math.min(nextP0.y, p0.y);\n          bottom = Math.max(nextP0.y, p0.y);\n          right = (p1.x + nextP1.x) / 2;\n          left = (p0.x + nextP0.x) / 2;\n        } else {\n          top = Math.min((p1.y + nextP1.y) / 2, (p0.y + nextP0.y) / 2);\n          bottom = Math.max((p1.y + nextP1.y) / 2, (p0.y + nextP0.y) / 2);\n          right = nextP1.x;\n          left = p0.x;\n        }\n      } else {\n        top = Math.min(point2.y, point0.y);\n        bottom = Math.max(point2.y, point0.y);\n        right = point2.x;\n        left = point0.x;\n      }\n    } else {\n      top = Math.min(point2.y, point0.y);\n      bottom = Math.max(point2.y, point0.y);\n      right = point2.x;\n      left = point0.x;\n    }\n\n    switch (position) {\n      case 'right':\n        labelPointCfg.x = right;\n        labelPointCfg.y = (top + bottom) / 2;\n        labelPointCfg.textAlign = get(labelPointCfg, 'textAlign', dir > 0 ? 'left' : 'right');\n        break;\n      case 'left':\n        labelPointCfg.x = left;\n        labelPointCfg.y = (top + bottom) / 2;\n        labelPointCfg.textAlign = get(labelPointCfg, 'textAlign', dir > 0 ? 'left' : 'right');\n        break;\n      case 'bottom':\n        if (transposed) {\n          labelPointCfg.x = (right + left) / 2;\n        }\n        labelPointCfg.y = bottom;\n        labelPointCfg.textAlign = get(labelPointCfg, 'textAlign', 'center');\n        labelPointCfg.textBaseline = get(labelPointCfg, 'textBaseline', dir > 0 ? 'bottom' : 'top');\n        break;\n      case 'middle':\n        if (transposed) {\n          labelPointCfg.x = (right + left) / 2;\n        }\n        labelPointCfg.y = (top + bottom) / 2;\n        labelPointCfg.textAlign = get(labelPointCfg, 'textAlign', 'center');\n        labelPointCfg.textBaseline = get(labelPointCfg, 'textBaseline', 'middle');\n        break;\n      case 'top':\n        if (transposed) {\n          labelPointCfg.x = (right + left) / 2;\n        }\n        labelPointCfg.y = top;\n        labelPointCfg.textAlign = get(labelPointCfg, 'textAlign', 'center');\n        labelPointCfg.textBaseline = get(labelPointCfg, 'textBaseline', dir > 0 ? 'bottom' : 'top');\n        break;\n      default:\n        break;\n    }\n  }\n}\n"]}