1 line
24 KiB
Plaintext
1 line
24 KiB
Plaintext
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{ deepMix, each, get, isArray, isFunction, isNil, isUndefined } from '@antv/util';\n\nimport { FIELD_ORIGIN } from '../../constant';\nimport { Scale } from '../../dependents';\nimport { Datum, LabelOption, MappingDatum, Point } from '../../interface';\nimport { LabelCfg, LabelItem, LabelPointCfg, TextAlign } from './interface';\n\nimport { getDefaultAnimateCfg } from '../../animate';\nimport { getPolygonCentroid } from '../../util/graphics';\n\nimport Labels from '../../component/labels';\nimport Geometry from '../base';\nimport Element from '../element';\n\nexport type GeometryLabelConstructor = new (cfg: any) => GeometryLabel;\n\nfunction avg(arr: number[]) {\n let sum = 0;\n each(arr, (value: number) => {\n sum += value;\n });\n return sum / arr.length;\n}\n\n/**\n * Geometry Label 基类，用于生成 Geometry 下所有 label 的配置项信息\n */\nexport default class GeometryLabel {\n /** geometry 实例 */\n public readonly geometry: Geometry;\n public labelsRenderer: Labels;\n /** 默认的布局 */\n public defaultLayout: string;\n\n constructor(geometry: Geometry) {\n this.geometry = geometry;\n }\n\n public getLabelItems(mapppingArray: MappingDatum[]): LabelItem[] {\n const items = [];\n const labelCfgs = this.getLabelCfgs(mapppingArray);\n // 获取 label 相关的 x，y 的值，获取具体的 x, y，防止存在数组\n each(mapppingArray, (mappingData: MappingDatum, index: number) => {\n const labelCfg = labelCfgs[index];\n if (!labelCfg || isNil(mappingData.x) || isNil(mappingData.y)) {\n items.push(null);\n return;\n }\n\n const labelContent = !isArray(labelCfg.content) ? [labelCfg.content] : labelCfg.content;\n labelCfg.content = labelContent;\n const total = labelContent.length;\n each(labelContent, (content, subIndex) => {\n if (isNil(content) || content === '') {\n items.push(null);\n return;\n }\n\n const item = {\n ...labelCfg,\n ...this.getLabelPoint(labelCfg, mappingData, subIndex),\n };\n if (!item.textAlign) {\n item.textAlign = this.getLabelAlign(item, subIndex, total);\n }\n\n if (item.offset <= 0) {\n item.labelLine = null;\n }\n\n items.push(item);\n });\n });\n return items;\n }\n\n public render(mapppingArray: MappingDatum[], isUpdate: boolean = false) {\n const labelItems = this.getLabelItems(mapppingArray);\n\n const labelsRenderer = this.getLabelsRenderer();\n const shapes = this.getGeometryShapes();\n // 渲染文本\n labelsRenderer.render(labelItems, shapes, isUpdate);\n }\n\n public clear() {\n const labelsRenderer = this.labelsRenderer;\n if (labelsRenderer) {\n labelsRenderer.clear();\n }\n }\n\n public destroy() {\n const labelsRenderer = this.labelsRenderer;\n if (labelsRenderer) {\n labelsRenderer.destroy();\n }\n this.labelsRenderer = null;\n }\n\n // geometry 更新之后，对应的 Coordinate 也会更新，为了获取到最新鲜的 Coordinate，故使用方法获取\n public getCoordinate() {\n return this.geometry.coordinate;\n }\n\n /**\n * 获取 label 的默认配置\n */\n protected getDefaultLabelCfg() {\n return get(this.geometry.theme, 'labels', {});\n }\n\n /**\n * 设置 label 位置\n * @param labelPointCfg\n * @param mappingData\n * @param index\n * @param position\n */\n protected setLabelPosition(\n labelPointCfg: LabelPointCfg,\n mappingData: MappingDatum,\n index: number,\n position: string\n ) {}\n\n /**\n * 获取文本默认偏移量\n * @param offset\n * @returns\n */\n protected getDefaultOffset(offset: number) {\n const coordinate = this.getCoordinate();\n const vector = this.getOffsetVector(offset);\n return coordinate.isTransposed ? vector[0] : vector[1];\n }\n\n /**\n * 获取每个 label 的偏移量\n * @param labelCfg\n * @param index\n * @param total\n * @returns\n */\n protected getLabelOffset(labelCfg: LabelCfg, index: number, total: number) {\n const offset = this.getDefaultOffset(labelCfg.offset);\n const coordinate = this.getCoordinate();\n const transposed = coordinate.isTransposed;\n const dim = transposed ? 'x' : 'y';\n const factor = transposed ? 1 : -1; // y 方向上越大，像素的坐标越小，所以transposed时将系数变成\n const offsetPoint = {\n x: 0,\n y: 0,\n };\n if (index > 0 || total === 1) {\n // 判断是否小于0\n offsetPoint[dim] = offset * factor;\n } else {\n offsetPoint[dim] = offset * factor * -1;\n }\n return offsetPoint;\n }\n\n /**\n * 获取每个 label 的位置\n * @param labelCfg\n * @param mappingData\n * @param index\n * @returns label point\n */\n protected getLabelPoint(labelCfg: LabelCfg, mappingData: MappingDatum, index: number): LabelPointCfg {\n const coordinate = this.getCoordinate();\n const total = labelCfg.content.length;\n\n function getDimValue(value, idx) {\n let v = value;\n if (isArray(v)) {\n if (labelCfg.content.length === 1) {\n // 如果仅一个 label，多个 y, 取最后一个 y\n if (v.length <= 2) {\n v = v[value.length - 1];\n } else {\n v = avg(v);\n }\n } else {\n v = v[idx];\n }\n }\n return v;\n }\n\n const label = {\n content: labelCfg.content[index],\n x: 0,\n y: 0,\n start: { x: 0, y: 0 },\n color: '#fff',\n };\n // 多边形场景，多用于地图\n if (mappingData && this.geometry.type === 'polygon') {\n const centroid = getPolygonCentroid(mappingData.x, mappingData.y);\n label.x = centroid[0];\n label.y = centroid[1];\n } else {\n label.x = getDimValue(mappingData.x, index);\n label.y = getDimValue(mappingData.y, index);\n }\n\n // 处理漏斗图文本位置\n const shape = isArray(mappingData.shape) ? mappingData.shape[0] : mappingData.shape;\n if (shape === 'funnel' || shape === 'pyramid') {\n const nextPoints = get(mappingData, 'nextPoints');\n const points = get(mappingData, 'points');\n if (nextPoints) {\n // 非漏斗图底部\n const point1 = coordinate.convert(points[1] as Point);\n const point2 = coordinate.convert(nextPoints[1] as Point);\n label.x = (point1.x + point2.x) / 2;\n label.y = (point1.y + point2.y) / 2;\n } else if (shape === 'pyramid') {\n const point1 = coordinate.convert(points[1] as Point);\n const point2 = coordinate.convert(points[2] as Point);\n label.x = (point1.x + point2.x) / 2;\n label.y = (point1.y + point2.y) / 2;\n }\n }\n\n if (labelCfg.position) {\n // 如果 label 支持 position 属性\n this.setLabelPosition(label, mappingData, index, labelCfg.position);\n }\n const offsetPoint = this.getLabelOffset(labelCfg, index, total);\n label.start = { x: label.x, y: label.y };\n label.x += offsetPoint.x;\n label.y += offsetPoint.y;\n label.color = mappingData.color;\n return label;\n }\n\n /**\n * 获取文本的对齐方式\n * @param item\n * @param index\n * @param total\n * @returns\n */\n protected getLabelAlign(item: LabelItem, index: number, total: number): TextAlign {\n let align: TextAlign = 'center';\n const coordinate = this.getCoordinate();\n if (coordinate.isTransposed) {\n const offset = this.getDefaultOffset(item.offset);\n if (offset < 0) {\n align = 'right';\n } else if (offset === 0) {\n align = 'center';\n } else {\n align = 'left';\n }\n if (total > 1 && index === 0) {\n if (align === 'right') {\n align = 'left';\n } else if (align === 'left') {\n align = 'right';\n }\n }\n }\n return align;\n }\n\n /**\n * 获取每一个 label 的唯一 id\n * @param mappingData label 对应的图形的绘制数据\n */\n protected getLabelId(mappingData: MappingDatum) {\n const geometry = this.geometry;\n const type = geometry.type;\n const xScale = geometry.getXScale();\n const yScale = geometry.getYScale();\n const origin = mappingData[FIELD_ORIGIN]; // 原始数据\n\n let labelId = geometry.getElementId(mappingData);\n if (type === 'line' || type === 'area') {\n // 折线图以及区域图，一条线会对应一组数据，即多个 labels，为了区分这些 labels，需要在 line id 的前提下加上 x 字段值\n labelId += ` ${origin[xScale.field]}`;\n } else if (type === 'path') {\n // path 路径图，无序，有可能存在相同 x 不同 y 的情况，需要通过 x y 来确定唯一 id\n labelId += ` ${origin[xScale.field]}-${origin[yScale.field]}`;\n }\n\n return labelId;\n }\n\n // 获取 labels 组件\n private getLabelsRenderer() {\n const { labelsContainer, labelOption, canvasRegion, animateOption } = this.geometry;\n const coordinate = this.geometry.coordinate;\n\n let labelsRenderer = this.labelsRenderer;\n if (!labelsRenderer) {\n labelsRenderer = new Labels({\n container: labelsContainer,\n layout: get(labelOption, ['cfg', 'layout'], {\n type: this.defaultLayout,\n }),\n });\n this.labelsRenderer = labelsRenderer;\n }\n labelsRenderer.region = canvasRegion;\n // 设置动画配置，如果 geometry 的动画关闭了，那么 label 的动画也会关闭\n labelsRenderer.animate = animateOption ? getDefaultAnimateCfg('label', coordinate) : false;\n\n return labelsRenderer;\n }\n\n private getLabelCfgs(mapppingArray: MappingDatum[]): LabelCfg[] {\n const geometry = this.geometry;\n const defaultLabelCfg = this.getDefaultLabelCfg();\n const { type, theme, labelOption, scales, coordinate } = geometry;\n const { fields, callback, cfg } = labelOption as LabelOption;\n const labelScales = fields.map((field: string) => {\n return scales[field];\n });\n\n const labelCfgs: LabelCfg[] = [];\n each(mapppingArray, (mappingData: MappingDatum, index: number) => {\n const origin = mappingData[FIELD_ORIGIN]; // 原始数据\n const originText = this.getLabelText(origin, labelScales);\n let callbackCfg;\n if (callback) {\n // 当同时配置了 callback 和 cfg 时，以 callback 为准\n const originValues = fields.map((field: string) => origin[field]);\n callbackCfg = callback(...originValues);\n if (isNil(callbackCfg)) {\n labelCfgs.push(null);\n return;\n }\n }\n\n let labelCfg = {\n id: this.getLabelId(mappingData), // 进行 ID 标记\n data: origin, // 存储原始数据\n mappingData, // 存储映射后的数据,\n coordinate, // 坐标系\n ...cfg,\n ...callbackCfg,\n };\n\n const content = labelCfg.content;\n if (isFunction(content)) {\n labelCfg.content = content(origin, mappingData, index);\n } else if (isUndefined(content)) {\n // 用户未配置 content，则默认为映射的第一个字段的值\n labelCfg.content = originText[0];\n }\n\n if (isFunction(labelCfg.position)) {\n labelCfg.position = labelCfg.position(origin, mappingData, index);\n }\n\n if (type === 'polygon' || (labelCfg.offset < 0 && !['line', 'point', 'path'].includes(type))) {\n // polygon 或者 offset 小于 0 时，文本展示在图形内部，将其颜色设置为 白色\n labelCfg = deepMix({}, defaultLabelCfg, theme.innerLabels, labelCfg);\n } else {\n labelCfg = deepMix({}, defaultLabelCfg, theme.labels, labelCfg);\n }\n\n labelCfgs.push(labelCfg);\n });\n\n return labelCfgs;\n }\n\n private getLabelText(origin: Datum, scales: Scale[]) {\n const labelTexts = [];\n each(scales, (scale: Scale) => {\n let value = origin[scale.field];\n if (isArray(value)) {\n value = value.map((subVal) => {\n return scale.getText(subVal);\n });\n } else {\n value = scale.getText(value);\n }\n\n if (isNil(value) || value === '') {\n labelTexts.push(null);\n } else {\n labelTexts.push(value);\n }\n });\n return labelTexts;\n }\n\n private getOffsetVector(offset = 0) {\n const coordinate = this.getCoordinate();\n // 如果 x,y 翻转，则偏移 x，否则偏移 y\n return coordinate.isTransposed ? coordinate.applyMatrix(offset, 0) : coordinate.applyMatrix(0, offset);\n }\n\n private getGeometryShapes() {\n const geometry = this.geometry;\n const shapes = {};\n each(geometry.elementsMap, (element: Element, id: string) => {\n shapes[id] = element.shape;\n });\n // 因为有可能 shape 还在进行动画，导致 shape.getBBox() 获取到的值不是最终态，所以需要从 offscreenGroup 获取\n each(geometry.getOffscreenGroup().getChildren(), (child) => {\n const id = geometry.getElementId(child.get('origin').mappingData);\n shapes[id] = child;\n });\n\n return shapes;\n }\n}\n"]} |