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{ deepMix, each, every, get, isNil } from '@antv/util';\nimport { LAYER } from '../constant';\nimport { IGroup } from '../dependents';\nimport { AxisCfg, Condition, Datum, FacetCfg, FacetData, FacetDataFilter, Region } from '../interface';\n\nimport View from '../chart/view';\nimport { getAxisOption } from '../util/axis';\n\n/**\n * facet 基类\n * - 定义生命周期，方便自定义 facet\n * - 提供基础的生命流程方法\n *\n * 生命周期：\n *\n * 初始化 init\n * 1. 初始化容器\n * 2. 数据分面，生成分面布局信息\n *\n * 渲染阶段 render\n * 1. view 创建\n * 2. title\n * 3. axis\n *\n * 清除阶段 clear\n * 1. 清除 view\n *\n * 销毁阶段 destroy\n * 1. clear\n * 2. 清除事件\n * 3. 清除 group\n */\nexport abstract class Facet<C extends FacetCfg<FacetData> = FacetCfg<FacetData>, F extends FacetData = FacetData> {\n /** 分面所在的 view */\n public view: View;\n /** 分面容器 */\n public container: IGroup;\n /** 是否销毁 */\n public destroyed: boolean = false;\n\n /** 分面的配置项 */\n protected cfg: C;\n /** 分面之后的所有分面数据结构 */\n protected facets: F[] = [];\n\n constructor(view: View, cfg: C) {\n this.view = view;\n this.cfg = deepMix({}, this.getDefaultCfg(), cfg);\n }\n\n /**\n * 初始化过程\n */\n public init() {\n // 初始化容器\n if (!this.container) {\n this.container = this.createContainer();\n }\n\n // 生成分面布局信息\n const data = this.view.getData();\n this.facets = this.generateFacets(data);\n }\n\n /**\n * 渲染分面，由上层 view 调用。包括：\n * - 分面 view\n * - 轴\n * - title\n *\n * 子类可以复写，添加一些其他组件，比如滚动条等\n */\n public render() {\n this.renderViews();\n }\n\n /**\n * 更新 facet\n */\n public update() {\n // 其实不用做任何事情，因为 facet 最终生成的 View 和 Geometry 都在父 view 的更新中处理了\n }\n\n /**\n * 清空，clear 之后如果还需要使用，需要重新调用 init 初始化过程\n * 一般在数据有变更的时候调用，重新进行数据的分面逻辑\n */\n public clear() {\n this.clearFacetViews();\n }\n\n /**\n * 销毁\n */\n public destroy() {\n this.clear();\n\n if (this.container) {\n this.container.remove(true);\n this.container = undefined;\n }\n\n this.destroyed = true;\n this.view = undefined;\n this.facets = [];\n }\n\n /**\n * 根据 facet 生成 view，可以给上层自定义使用\n * @param facet\n */\n protected facetToView(facet: F): View {\n const { region, data, padding = this.cfg.padding } = facet;\n\n const view = this.view.createView({\n region,\n padding,\n });\n\n // 设置分面的数据\n view.data(data || []);\n facet.view = view;\n\n // 前置钩子\n this.beforeEachView(view, facet);\n\n const { eachView } = this.cfg;\n if (eachView) {\n eachView(view, facet);\n }\n\n // 后置钩子\n this.afterEachView(view, facet);\n\n return view;\n }\n\n // 创建容器\n private createContainer(): IGroup {\n const foregroundGroup = this.view.getLayer(LAYER.FORE);\n return foregroundGroup.addGroup();\n }\n\n /**\n * 初始化 view\n */\n private renderViews() {\n this.createFacetViews();\n }\n\n /**\n * 创建 分面 view\n */\n private createFacetViews(): View[] {\n // 使用分面数据 创建分面 view\n return this.facets.map(\n (facet): View => {\n return this.facetToView(facet);\n }\n );\n }\n\n /**\n * 从 view 中清除 facetView\n */\n private clearFacetViews() {\n // 从 view 中移除分面 view\n each(this.facets, (facet) => {\n if (facet.view) {\n this.view.removeView(facet.view);\n facet.view = undefined;\n }\n });\n }\n\n // 其他一些提供给子类使用的方法\n\n /**\n * 获取这个字段对应的所有值，数组\n * @protected\n * @param data 数据\n * @param field 字段名\n * @return 字段对应的值\n */\n protected getFieldValues(data: Datum[], field: string): string[] {\n const rst = [];\n const cache: Record<string, boolean> = {};\n\n // 去重、去除 Nil 值\n each(data, (d: Datum) => {\n const value = d[field];\n if (!isNil(value) && !cache[value]) {\n rst.push(value);\n cache[value] = true;\n }\n });\n\n return rst;\n }\n\n /**\n * 获得每个分面的 region，平分区域\n * @param rows row 总数\n * @param cols col 总数\n * @param xIndex x 方向 index\n * @param yIndex y 方向 index\n */\n protected getRegion(rows: number, cols: number, xIndex: number, yIndex: number): Region {\n // x, y 方向均分 100% 宽高\n const xRatio = 1 / (cols === 0 ? 1 : cols);\n const yRatio = 1 / (rows === 0 ? 1 : rows);\n\n const start = {\n x: xRatio * xIndex,\n y: yRatio * yIndex,\n };\n\n const end = {\n x: xRatio * (xIndex + 1),\n y: yRatio * (yIndex + 1),\n };\n\n return {\n start,\n end,\n };\n }\n\n protected getDefaultCfg() {\n return {\n eachView: undefined,\n showTitle: true,\n padding: 10,\n fields: [],\n }\n }\n\n /**\n * 默认的 title 样式，因为有的分面是 title，有的分面配置是 columnTitle、rowTitle\n */\n protected getDefaultTitleCfg() {\n // @ts-ignore\n const fontFamily = this.view.getTheme().fontFamily;\n return {\n style: {\n fontSize: 14,\n fill: '#666',\n fontFamily,\n }\n };\n }\n\n /**\n * 处理 axis 的默认配置\n * @param view\n * @param facet\n */\n protected processAxis(view: View, facet: F) {\n const options = view.getOptions();\n\n const coordinateOption = options.coordinate;\n const geometries = view.geometries;\n\n const coordinateType = get(coordinateOption, 'type', 'rect');\n\n if (coordinateType === 'rect' && geometries.length) {\n\n if (isNil(options.axes)) {\n // @ts-ignore\n options.axes = {};\n }\n const axes = options.axes;\n\n const [x, y] = geometries[0].getXYFields();\n\n const xOption = getAxisOption(axes, x);\n const yOption = getAxisOption(axes, y);\n\n if (xOption !== false) {\n options.axes[x] = this.getXAxisOption(x, axes, xOption, facet);\n }\n\n if (yOption !== false) {\n options.axes[y] = this.getYAxisOption(y, axes, yOption, facet);\n }\n }\n }\n\n /**\n * 获取分面数据\n * @param conditions\n */\n protected getFacetDataFilter(conditions: Condition[]): FacetDataFilter {\n return (datum: Datum) => {\n // 过滤出全部满足条件的数据\n return every(conditions, (condition) => {\n const { field, value } = condition;\n\n if (!isNil(value) && field) {\n return datum[field] === value;\n }\n return true;\n });\n };\n }\n\n /**\n * @override 开始处理 eachView\n * @param view\n * @param facet\n */\n protected abstract beforeEachView(view: View, facet: F);\n\n /**\n * @override 处理 eachView 之后\n * @param view\n * @param facet\n */\n protected abstract afterEachView(view: View, facet: F);\n\n /**\n * @override 生成分面数据，包含布局\n * @param data\n */\n protected abstract generateFacets(data: Datum[]): F[];\n\n /**\n * 获取 x 轴的配置\n * @param x\n * @param axes\n * @param option\n * @param facet\n */\n protected abstract getXAxisOption(x: string, axes: any, option: AxisCfg, facet: F): object;\n\n /**\n * 获取 y 轴的配置\n * @param y\n * @param axes\n * @param option\n * @param facet\n */\n protected abstract getYAxisOption(y: string, axes: any, option: AxisCfg, facet: F): object;\n}\n\n"]} |