| 1 | 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{ deepMix, each, get, isArray, isNull } from '@antv/util';\nimport { BBox, Coordinate, IGroup, IShape } from '../dependents';\nimport { LabelItem } from '../geometry/label/interface';\nimport { AnimateOption, GeometryLabelLayoutCfg } from '../interface';\nimport { doAnimate } from '../animate';\nimport { getGeometryLabelLayout } from '../geometry/label';\nimport { getLabelBackgroundInfo } from '../geometry/label/util';\nimport { polarToCartesian } from '../util/graphics';\nimport { rotate, translate } from '../util/transform';\nimport { FIELD_ORIGIN } from '../constant';\nimport { updateLabel } from './update-label';\n\n/**\n * Labels 实例创建时，传入构造函数的参数定义\n */\nexport interface LabelsGroupCfg {\n /** label 容器 */\n container: IGroup;\n /** label 布局配置 */\n layout?: GeometryLabelLayoutCfg | GeometryLabelLayoutCfg[];\n}\n\n/**\n * Geometry labels 渲染组件\n */\nexport default class Labels {\n /** 用于指定 labels 布局的类型 */\n public layout: GeometryLabelLayoutCfg | GeometryLabelLayoutCfg[];\n /** 图形容器 */\n public container: IGroup;\n /** 动画配置 */\n public animate: AnimateOption | false;\n /** label 绘制的区域 */\n public region: BBox;\n\n /** 存储当前 shape 的映射表，键值为 shape id */\n public shapesMap: Record<string, IGroup> = {};\n\n constructor(cfg: LabelsGroupCfg) {\n const { layout, container } = cfg;\n\n this.layout = layout;\n this.container = container;\n }\n /**\n * 渲染文本\n */\n public async render(items: LabelItem[], shapes: Record<string, IShape | IGroup>, isUpdate: boolean = false) {\n const shapesMap = {};\n const offscreenGroup = this.createOffscreenGroup(); // 创建虚拟分组\n if (items.length) {\n // 如果 items 空的话就不进行绘制调整操作\n // step 1: 在虚拟 group 中创建 shapes\n for (const item of items) {\n if (item) {\n shapesMap[item.id] = this.renderLabel(item, offscreenGroup);\n }\n }\n // [todo] Move layout into Worker.\n // step 2: 根据布局，调整 labels\n await this.doLayout(items, shapes, shapesMap);\n\n // step 3.1: 绘制 labelLine\n this.renderLabelLine(items, shapesMap);\n // step 3.2: 绘制 labelBackground\n this.renderLabelBackground(items, shapesMap);\n // step 4: 根据用户设置的偏移量调整 label\n this.adjustLabel(items, shapesMap);\n }\n\n // 进行添加、更新、销毁操作\n const lastShapesMap = this.shapesMap;\n each(shapesMap, (shape, id) => {\n if (shape.destroyed) {\n // label 在布局调整环节被删除了（doLayout）\n delete shapesMap[id];\n } else {\n if (lastShapesMap[id]) {\n // 图形发生更新\n const data = shape.get('data');\n const origin = shape.get('origin');\n const coordinate = shape.get('coordinate');\n const currentAnimateCfg = shape.get('animateCfg');\n\n const currentShape = lastShapesMap[id]; // 已经在渲染树上的 shape\n updateLabel(currentShape, shapesMap[id], {\n data,\n origin,\n animateCfg: currentAnimateCfg,\n coordinate,\n });\n\n shapesMap[id] = currentShape; // 保存引用\n } else {\n // 新生成的 shape\n // If container has been destroyed, no need to render labels.\n if (this.container.destroyed) return;\n this.container.add(shape);\n const animateCfg = get(shape.get('animateCfg'), isUpdate ? 'enter' : 'appear');\n if (animateCfg) {\n doAnimate(shape, animateCfg, {\n toAttrs: {\n ...shape.attr(),\n },\n coordinate: shape.get('coordinate'),\n });\n }\n }\n delete lastShapesMap[id];\n }\n });\n\n // 移除\n each(lastShapesMap, (deleteShape) => {\n const animateCfg = get(deleteShape.get('animateCfg'), 'leave');\n if (animateCfg) {\n doAnimate(deleteShape, animateCfg, {\n toAttrs: null,\n coordinate: deleteShape.get('coordinate'),\n });\n } else {\n deleteShape.remove(true); // 移除\n }\n });\n\n this.shapesMap = shapesMap;\n offscreenGroup.destroy();\n }\n\n /** 清除当前 labels */\n public clear() {\n this.container.clear();\n this.shapesMap = {};\n }\n\n /** 销毁 */\n public destroy() {\n this.container.destroy();\n this.shapesMap = null;\n }\n\n private renderLabel(cfg: LabelItem, container: IGroup): IGroup {\n const { id, elementId, data, mappingData, coordinate, animate, content } = cfg;\n const shapeAppendCfg = {\n id,\n elementId,\n data,\n origin: {\n ...mappingData,\n data: mappingData[FIELD_ORIGIN],\n },\n coordinate,\n };\n const labelGroup = container.addGroup({\n name: 'label',\n // 如果 this.animate === false 或者 cfg.animate === false/null 则不进行动画，否则进行动画配置的合并\n animateCfg:\n this.animate === false || animate === null || animate === false ? false : deepMix({}, this.animate, animate),\n ...shapeAppendCfg,\n });\n let labelShape;\n if ((content.isGroup && content.isGroup()) || (content.isShape && content.isShape())) {\n // 如果 content 是 Group 或者 Shape，根据 textAlign 调整位置后，直接将其加入 labelGroup\n const { width, height } = content.getCanvasBBox();\n const textAlign = get(cfg, 'textAlign', 'left');\n\n let x = cfg.x;\n const y = cfg.y - height / 2;\n\n if (textAlign === 'center') {\n x = x - width / 2;\n } else if (textAlign === 'right' || textAlign === 'end') {\n x = x - width;\n }\n\n translate(content, x, y); // 将 label 平移至 x, y 指定的位置\n labelShape = content;\n labelGroup.add(content);\n } else {\n const fill = get(cfg, ['style', 'fill']);\n labelShape = labelGroup.addShape('text', {\n attrs: {\n x: cfg.x,\n y: cfg.y,\n textAlign: cfg.textAlign,\n textBaseline: get(cfg, 'textBaseline', 'middle'),\n text: cfg.content,\n ...cfg.style,\n fill: isNull(fill) ? cfg.color : fill,\n },\n ...shapeAppendCfg,\n });\n }\n\n if (cfg.rotate) {\n rotate(labelShape, cfg.rotate);\n }\n return labelGroup;\n }\n\n // 根据type对label布局\n private async doLayout(items: LabelItem[], shapes: Record<string, IShape | IGroup>, shapesMap: Record<string, IGroup>) {\n if (this.layout) {\n const layouts = isArray(this.layout) ? this.layout : [this.layout];\n await Promise.all(layouts.map((layout: GeometryLabelLayoutCfg) => {\n const layoutFn = getGeometryLabelLayout(get(layout, 'type', ''));\n if (!layoutFn) return;\n\n const labelShapes = [];\n const geometryShapes = [];\n each(shapesMap, (labelShape, id) => {\n labelShapes.push(labelShape);\n geometryShapes.push(shapes[labelShape.get('elementId')]);\n });\n // [todo] Refactor more layout into Worker.\n return layoutFn(items, labelShapes, geometryShapes, this.region, layout.cfg);\n }));\n }\n }\n\n private renderLabelLine(labelItems: LabelItem[], shapesMap) {\n each(labelItems, (labelItem) => {\n const coordinate: Coordinate = get(labelItem, 'coordinate');\n if (!labelItem || !coordinate) {\n return;\n }\n const center = coordinate.getCenter();\n const radius = coordinate.getRadius();\n if (!labelItem.labelLine) {\n // labelLine: null | false，关闭 label 对应的 labelLine\n return;\n }\n const labelLineCfg = get(labelItem, 'labelLine', {});\n const id = labelItem.id;\n let path = labelLineCfg.path;\n if (!path) {\n const start = polarToCartesian(center.x, center.y, radius, labelItem.angle);\n path = [\n ['M', start.x, start.y],\n ['L', labelItem.x, labelItem.y],\n ];\n }\n const labelGroup = shapesMap[id];\n if (!labelGroup.destroyed) {\n labelGroup.addShape('path', {\n capture: false, // labelLine 默认不参与事件捕获\n attrs: {\n path,\n stroke: labelItem.color ? labelItem.color : get(labelItem, ['style', 'fill'], '#000'),\n fill: null,\n ...labelLineCfg.style,\n },\n id,\n origin: labelItem.mappingData,\n data: labelItem.data,\n coordinate: labelItem.coordinate,\n });\n }\n });\n }\n\n /**\n * 绘制标签背景\n * @param labelItems\n */\n private renderLabelBackground(labelItems: LabelItem[], shapesMap) {\n each(labelItems, (labelItem) => {\n const coordinate: Coordinate = get(labelItem, 'coordinate');\n const background: LabelItem['background'] = get(labelItem, 'background');\n if (!background || !coordinate) {\n return;\n }\n\n const id = labelItem.id;\n const labelGroup = shapesMap[id];\n if (!labelGroup.destroyed) {\n const labelContentShape = labelGroup.getChildren()[0];\n if (labelContentShape) {\n const { rotation, ...box } = getLabelBackgroundInfo(labelGroup, labelItem, background.padding);\n const backgroundShape = labelGroup.addShape('rect', {\n attrs: {\n ...box,\n ...(background.style || {}),\n },\n id,\n origin: labelItem.mappingData,\n data: labelItem.data,\n coordinate: labelItem.coordinate,\n });\n backgroundShape.setZIndex(-1);\n\n if (rotation) {\n const matrix = labelContentShape.getMatrix();\n backgroundShape.setMatrix(matrix);\n }\n }\n }\n });\n }\n\n private createOffscreenGroup() {\n const container = this.container;\n const GroupClass = container.getGroupBase(); // 获取分组的构造函数\n const newGroup = new GroupClass({});\n return newGroup;\n }\n\n private adjustLabel(items: LabelItem[], shapesMap) {\n each(items, (item) => {\n if (item) {\n const id = item.id;\n const labelGroup = shapesMap[id];\n if (!labelGroup.destroyed) {\n // fix: 如果说开发者的 label content 是一个 group，此处的偏移无法对 整个 content group 生效；场景类似 饼图 spider label 是一个含 2 个 textShape 的 gorup\n const labelShapes = labelGroup.findAll((ele) => ele.get('type') !== 'path');\n each(labelShapes, (labelShape) => {\n if (labelShape) {\n if (item.offsetX) {\n labelShape.attr('x', labelShape.attr('x') + item.offsetX);\n }\n if (item.offsetY) {\n labelShape.attr('y', labelShape.attr('y') + item.offsetY);\n }\n }\n });\n }\n }\n });\n }\n}\n"]} |