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{ FIELD_ORIGIN } from '../constant';\nimport { MappingDatum, ShapeInfo } from '../interface';\nimport Geometry, { GeometryCfg } from './base';\nimport Element from './element';\n/** 引入对应的 ShapeFactory */\nimport './shape/line';\nimport { isModelChange } from './util/is-model-change';\nimport { diff } from './util/diff';\n\n/** Path 构造函数参数类型 */\nexport interface PathCfg extends GeometryCfg {\n /** 是否连接空值 */\n connectNulls?: boolean;\n /** 单个孤立数据点是否展示 */\n showSinglePoint?: boolean;\n}\n\n/**\n * Path 几何标记。\n * 用于绘制路径图等。\n */\nexport default class Path extends Geometry {\n public readonly type: string = 'path';\n public readonly shapeType: string = 'line';\n /** 是否连接空值 */\n public connectNulls: boolean;\n /** 单个孤立数据点是否展示 */\n public showSinglePoint: boolean;\n\n constructor(cfg: PathCfg) {\n super(cfg);\n\n const { connectNulls = false, showSinglePoint = true } = cfg;\n this.connectNulls = connectNulls;\n this.showSinglePoint = showSinglePoint;\n }\n\n /**\n * 创建所有的 Element 实例，对于 Path、Line、Area，一组数据对应一个 Element。\n * @param mappingData\n * @param [isUpdate]\n * @returns elements\n */\n protected updateElements(mappingDataArray: MappingDatum[][], isUpdate: boolean = false) {\n // Path 的每个 element 对应一组数据\n const keyData = new Map<string, MappingDatum[]>();\n const keyIndex = new Map<string, number>();\n const keys: string[] = [];\n\n let index = 0;\n for (let i = 0; i < mappingDataArray.length; i++) {\n const mappingData = mappingDataArray[i];\n const key = this.getElementId(mappingData);\n keys.push(key);\n keyData.set(key, mappingData);\n keyIndex.set(key, index);\n index++;\n }\n\n this.elements = new Array(index);\n\n const { added, updated, removed } = diff(this.lastElementsMap, keys);\n\n for (const key of added) {\n const mappingData = keyData.get(key);\n const shapeFactory = this.getShapeFactory();\n const shapeCfg = this.getShapeInfo(mappingData);\n const i = keyIndex.get(key);\n const element = new Element({\n shapeFactory,\n container: this.container,\n offscreenGroup: this.getOffscreenGroup(),\n elementIndex: i,\n });\n element.geometry = this;\n element.animate = this.animateOption;\n element.draw(shapeCfg, isUpdate); // 绘制 shape\n this.elementsMap[key] = element;\n this.elements[i] = element;\n }\n\n for (const key of updated) {\n const mappingData = keyData.get(key);\n const element = this.lastElementsMap[key];\n const i = keyIndex.get(key);\n const shapeCfg = this.getShapeInfo(mappingData);\n const preShapeCfg = element.getModel();\n if (this.isCoordinateChanged || isModelChange(preShapeCfg, shapeCfg)) {\n element.animate = this.animateOption;\n // 通过绘制数据的变更来判断是否需要更新，因为用户有可能会修改图形属性映射\n element.update(shapeCfg); // 更新对应的 element\n }\n this.elementsMap[key] = element;\n this.elements[i] = element;\n }\n\n for (const key of removed) {\n const element = this.lastElementsMap[key];\n // 更新动画配置，用户有可能在更新之前有对动画进行配置操作\n element.animate = this.animateOption;\n element.destroy();\n }\n }\n\n /**\n * 获取组成一条线（一组数据）的所有点以及数据\n * @param mappingData 映射后的数组\n */\n protected getPointsAndData(mappingData: MappingDatum[]) {\n const points = [];\n const data = [];\n\n for (let i = 0, len = mappingData.length; i < len; i++) {\n const obj = mappingData[i];\n points.push({\n x: obj.x,\n y: obj.y,\n });\n data.push(obj[FIELD_ORIGIN]);\n }\n\n return {\n points,\n data,\n };\n }\n\n private getShapeInfo(mappingData: MappingDatum[]): ShapeInfo {\n const shapeCfg = this.getDrawCfg(mappingData[0]);\n const { points, data } = this.getPointsAndData(mappingData);\n shapeCfg.mappingData = mappingData;\n shapeCfg.data = data;\n shapeCfg.isStack = !!this.getAdjust('stack');\n shapeCfg.points = points;\n shapeCfg.connectNulls = this.connectNulls;\n shapeCfg.showSinglePoint = this.showSinglePoint;\n\n return shapeCfg;\n }\n}\n"]} |