src/chart/lines/LinesSeries.ts - echarts - Git at Google

 /*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

 /* global Uint32Array, Float64Array, Float32Array */

 import SeriesModel from '../../model/Series';
 import SeriesData from '../../data/SeriesData';
 import { concatArray, mergeAll, map, isNumber } from 'zrender/src/core/util';
 import CoordinateSystem from '../../core/CoordinateSystem';
 import {
     SeriesOption,
     SeriesOnCartesianOptionMixin,
     SeriesOnGeoOptionMixin,
     SeriesOnPolarOptionMixin,
     SeriesOnCalendarOptionMixin,
     SeriesLargeOptionMixin,
     LineStyleOption,
     OptionDataValue,
     StatesOptionMixin,
     SeriesLineLabelOption,
     DimensionDefinitionLoose,
     DefaultStatesMixinEmphasis,
     ZRColor,
     CallbackDataParams
 } from '../../util/types';
 import GlobalModel from '../../model/Global';
 import type { LineDrawModelOption } from '../helper/LineDraw';
 import { createTooltipMarkup } from '../../component/tooltip/tooltipMarkup';

 const Uint32Arr = typeof Uint32Array === 'undefined' ? Array : Uint32Array;
 const Float64Arr = typeof Float64Array === 'undefined' ? Array : Float64Array;

 function compatEc2(seriesOpt: LinesSeriesOption) {
     const data = seriesOpt.data;
     if (data && data[0] && (data as LegacyDataItemOption[][])[0][0] && (data as LegacyDataItemOption[][])[0][0].coord) {
         if (__DEV__) {
             console.warn('Lines data configuration has been changed to'
                 + ' { coords:[[1,2],[2,3]] }');
         }
         seriesOpt.data = map(data as LegacyDataItemOption[][], function (itemOpt) {
             const coords = [
                 itemOpt[0].coord, itemOpt[1].coord
             ];
             const target: LinesDataItemOption = {
                 coords: coords
             };
             if (itemOpt[0].name) {
                 target.fromName = itemOpt[0].name;
             }
             if (itemOpt[1].name) {
                 target.toName = itemOpt[1].name;
             }
             return mergeAll([target, itemOpt[0], itemOpt[1]]);
         });
     }
 }

 type LinesCoords = number[][];

 type LinesValue = OptionDataValue | OptionDataValue[];

 interface LinesLineStyleOption<TClr> extends LineStyleOption<TClr> {
     curveness?: number
 }

 // @deprecated
 interface LegacyDataItemOption {
     coord: number[]
     name: string
 }

 interface LinesStatesMixin {
     emphasis?: DefaultStatesMixinEmphasis
 }
 export interface LinesStateOption<TCbParams = never> {
     lineStyle?: LinesLineStyleOption<(TCbParams extends never ? never : (params: TCbParams) => ZRColor) | ZRColor>
     label?: SeriesLineLabelOption
 }

 export interface LinesDataItemOption extends LinesStateOption,
     StatesOptionMixin<LinesStateOption, LinesStatesMixin> {
     name?: string

     fromName?: string
     toName?: string

     symbol?: string[] | string
     symbolSize?: number[] | number

     coords?: LinesCoords

     value?: LinesValue

     effect?: LineDrawModelOption['effect']
 }

 export interface LinesSeriesOption
     extends SeriesOption<LinesStateOption, LinesStatesMixin>, LinesStateOption<CallbackDataParams>,
     SeriesOnCartesianOptionMixin, SeriesOnGeoOptionMixin, SeriesOnPolarOptionMixin,
     SeriesOnCalendarOptionMixin, SeriesLargeOptionMixin {

     type?: 'lines'

     coordinateSystem?: string

     symbol?: string[] | string
     symbolSize?: number[] | number

     effect?: LineDrawModelOption['effect']

     /**
      * If lines are polyline
      * polyline not support curveness, label, animation
      */
     polyline?: boolean
     /**
      * If clip the overflow.
      * Available when coordinateSystem is cartesian or polar.
      */
     clip?: boolean

     data?: LinesDataItemOption[]
         // Stored as a flat array. In format
         // Points Count(2) | x | y | x | y | Points Count(3) | x |  y | x | y | x | y |
         | ArrayLike<number>

     dimensions?: DimensionDefinitionLoose | DimensionDefinitionLoose[]
 }

 class LinesSeriesModel extends SeriesModel<LinesSeriesOption> {

     static readonly type = 'series.lines';
     readonly type = LinesSeriesModel.type;

     static readonly dependencies = ['grid', 'polar', 'geo', 'calendar'];

     visualStyleAccessPath = 'lineStyle';
     visualDrawType = 'stroke' as const;

     private _flatCoords: ArrayLike<number>;
     private _flatCoordsOffset: ArrayLike<number>;

     init(option: LinesSeriesOption) {
         // The input data may be null/undefined.
         option.data = option.data || [];

         // Not using preprocessor because mergeOption may not have series.type
         compatEc2(option);

         const result = this._processFlatCoordsArray(option.data);
         this._flatCoords = result.flatCoords;
         this._flatCoordsOffset = result.flatCoordsOffset;
         if (result.flatCoords) {
             option.data = new Float32Array(result.count);
         }

         super.init.apply(this, arguments as any);
     }

     mergeOption(option: LinesSeriesOption) {
         compatEc2(option);

         if (option.data) {
             // Only update when have option data to merge.
             const result = this._processFlatCoordsArray(option.data);
             this._flatCoords = result.flatCoords;
             this._flatCoordsOffset = result.flatCoordsOffset;
             if (result.flatCoords) {
                 option.data = new Float32Array(result.count);
             }
         }

         super.mergeOption.apply(this, arguments as any);
     }

     appendData(params: Pick<LinesSeriesOption, 'data'>) {
         const result = this._processFlatCoordsArray(params.data);
         if (result.flatCoords) {
             if (!this._flatCoords) {
                 this._flatCoords = result.flatCoords;
                 this._flatCoordsOffset = result.flatCoordsOffset;
             }
             else {
                 this._flatCoords = concatArray(this._flatCoords, result.flatCoords);
                 this._flatCoordsOffset = concatArray(this._flatCoordsOffset, result.flatCoordsOffset);
             }
             params.data = new Float32Array(result.count);
         }

         this.getRawData().appendData(params.data);
     }

     _getCoordsFromItemModel(idx: number) {
         const itemModel = this.getData().getItemModel<LinesDataItemOption>(idx);
         const coords = (itemModel.option instanceof Array)
             ? itemModel.option : itemModel.getShallow('coords');

         if (__DEV__) {
             if (!(coords instanceof Array && coords.length > 0 && coords[0] instanceof Array)) {
                 throw new Error(
                     'Invalid coords ' + JSON.stringify(coords) + '. Lines must have 2d coords array in data item.'
                 );
             }
         }
         return coords;
     }

     getLineCoordsCount(idx: number) {
         if (this._flatCoordsOffset) {
             return this._flatCoordsOffset[idx * 2 + 1];
         }
         else {
             return this._getCoordsFromItemModel(idx).length;
         }
     }

     getLineCoords(idx: number, out: number[][]) {
         if (this._flatCoordsOffset) {
             const offset = this._flatCoordsOffset[idx * 2];
             const len = this._flatCoordsOffset[idx * 2 + 1];
             for (let i = 0; i < len; i++) {
                 out[i] = out[i] || [];
                 out[i][0] = this._flatCoords[offset + i * 2];
                 out[i][1] = this._flatCoords[offset + i * 2 + 1];
             }
             return len;
         }
         else {
             const coords = this._getCoordsFromItemModel(idx);
             for (let i = 0; i < coords.length; i++) {
                 out[i] = out[i] || [];
                 out[i][0] = coords[i][0];
                 out[i][1] = coords[i][1];
             }
             return coords.length;
         }
     }

     _processFlatCoordsArray(data: LinesSeriesOption['data']) {
         let startOffset = 0;
         if (this._flatCoords) {
             startOffset = this._flatCoords.length;
         }
         // Stored as a typed array. In format
         // Points Count(2) | x | y | x | y | Points Count(3) | x |  y | x | y | x | y |
         if (isNumber(data[0])) {
             const len = data.length;
             // Store offset and len of each segment
             const coordsOffsetAndLenStorage = new Uint32Arr(len) as Uint32Array;
             const coordsStorage = new Float64Arr(len) as Float64Array;
             let coordsCursor = 0;
             let offsetCursor = 0;
             let dataCount = 0;
             for (let i = 0; i < len;) {
                 dataCount++;
                 const count = data[i++] as number;
                 // Offset
                 coordsOffsetAndLenStorage[offsetCursor++] = coordsCursor + startOffset;
                 // Len
                 coordsOffsetAndLenStorage[offsetCursor++] = count;
                 for (let k = 0; k < count; k++) {
                     const x = data[i++] as number;
                     const y = data[i++] as number;
                     coordsStorage[coordsCursor++] = x;
                     coordsStorage[coordsCursor++] = y;

                     if (i > len) {
                         if (__DEV__) {
                             throw new Error('Invalid data format.');
                         }
                     }
                 }
             }

             return {
                 flatCoordsOffset: new Uint32Array(coordsOffsetAndLenStorage.buffer, 0, offsetCursor),
                 flatCoords: coordsStorage,
                 count: dataCount
             };
         }

         return {
             flatCoordsOffset: null,
             flatCoords: null,
             count: data.length
         };
     }

     getInitialData(option: LinesSeriesOption, ecModel: GlobalModel) {
         if (__DEV__) {
             const CoordSys = CoordinateSystem.get(option.coordinateSystem);
             if (!CoordSys) {
                 throw new Error('Unknown coordinate system ' + option.coordinateSystem);
             }
         }

         const lineData = new SeriesData(['value'], this);
         lineData.hasItemOption = false;

         lineData.initData(option.data, [], function (dataItem, dimName, dataIndex, dimIndex) {
             // dataItem is simply coords
             if (dataItem instanceof Array) {
                 return NaN;
             }
             else {
                 lineData.hasItemOption = true;
                 const value = dataItem.value;
                 if (value != null) {
                     return value instanceof Array ? value[dimIndex] : value;
                 }
             }
         });

         return lineData;
     }

     formatTooltip(
         dataIndex: number,
         multipleSeries: boolean,
         dataType: string
     ) {
         const data = this.getData();
         const itemModel = data.getItemModel<LinesDataItemOption>(dataIndex);
         const name = itemModel.get('name');
         if (name) {
             return name;
         }
         const fromName = itemModel.get('fromName');
         const toName = itemModel.get('toName');
         const nameArr = [];
         fromName != null && nameArr.push(fromName);
         toName != null && nameArr.push(toName);

         return createTooltipMarkup('nameValue', {
             name: nameArr.join(' > ')
         });
     }

     preventIncremental() {
         return !!this.get(['effect', 'show']);
     }

     getProgressive() {
         const progressive = this.option.progressive;
         if (progressive == null) {
             return this.option.large ? 1e4 : this.get('progressive');
         }
         return progressive;
     }

     getProgressiveThreshold() {
         const progressiveThreshold = this.option.progressiveThreshold;
         if (progressiveThreshold == null) {
             return this.option.large ? 2e4 : this.get('progressiveThreshold');
         }
         return progressiveThreshold;
     }

     getZLevelKey() {
         const effectModel = this.getModel('effect');
         const trailLength = effectModel.get('trailLength');
         return this.getData().count() > this.getProgressiveThreshold()
             // Each progressive series has individual key.
             ? this.id
             : (effectModel.get('show') && trailLength > 0 ? trailLength + '' : '');
     }

     static defaultOption: LinesSeriesOption = {
         coordinateSystem: 'geo',
         // zlevel: 0,
         z: 2,
         legendHoverLink: true,

         // Cartesian coordinate system
         xAxisIndex: 0,
         yAxisIndex: 0,

         symbol: ['none', 'none'],
         symbolSize: [10, 10],
         // Geo coordinate system
         geoIndex: 0,

         effect: {
             show: false,
             period: 4,
             constantSpeed: 0,
             symbol: 'circle',
             symbolSize: 3,
             loop: true,
             trailLength: 0.2
         },

         large: false,
         // Available when large is true
         largeThreshold: 2000,

         polyline: false,

         clip: true,

         label: {
             show: false,
             position: 'end'
             // distance: 5,
             // formatter: 标签文本格式器，同Tooltip.formatter，不支持异步回调
         },

         lineStyle: {
             opacity: 0.5
         }
     };
 }

 export default LinesSeriesModel;
	/*
	* Licensed to the Apache Software Foundation (ASF) under one
	* or more contributor license agreements. See the NOTICE file
	* distributed with this work for additional information
	* regarding copyright ownership. The ASF licenses this file
	* to you under the Apache License, Version 2.0 (the
	* "License"); you may not use this file except in compliance
	* with the License. You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing,
	* software distributed under the License is distributed on an
	* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
	* KIND, either express or implied. See the License for the
	* specific language governing permissions and limitations
	* under the License.
	*/

	/* global Uint32Array, Float64Array, Float32Array */

	import SeriesModel from '../../model/Series';
	import SeriesData from '../../data/SeriesData';
	import { concatArray, mergeAll, map, isNumber } from 'zrender/src/core/util';
	import CoordinateSystem from '../../core/CoordinateSystem';
	import {
	SeriesOption,
	SeriesOnCartesianOptionMixin,
	SeriesOnGeoOptionMixin,
	SeriesOnPolarOptionMixin,
	SeriesOnCalendarOptionMixin,
	SeriesLargeOptionMixin,
	LineStyleOption,
	OptionDataValue,
	StatesOptionMixin,
	SeriesLineLabelOption,
	DimensionDefinitionLoose,
	DefaultStatesMixinEmphasis,
	ZRColor,
	CallbackDataParams
	} from '../../util/types';
	import GlobalModel from '../../model/Global';
	import type { LineDrawModelOption } from '../helper/LineDraw';
	import { createTooltipMarkup } from '../../component/tooltip/tooltipMarkup';

	const Uint32Arr = typeof Uint32Array === 'undefined' ? Array : Uint32Array;
	const Float64Arr = typeof Float64Array === 'undefined' ? Array : Float64Array;

	function compatEc2(seriesOpt: LinesSeriesOption) {
	const data = seriesOpt.data;
	if (data && data[0] && (data as LegacyDataItemOption[][])[0][0] && (data as LegacyDataItemOption[][])[0][0].coord) {
	if (__DEV__) {
	console.warn('Lines data configuration has been changed to'
	+ ' { coords:[[1,2],[2,3]] }');
	}
	seriesOpt.data = map(data as LegacyDataItemOption[][], function (itemOpt) {
	const coords = [
	itemOpt[0].coord, itemOpt[1].coord
	];
	const target: LinesDataItemOption = {
	coords: coords
	};
	if (itemOpt[0].name) {
	target.fromName = itemOpt[0].name;
	}
	if (itemOpt[1].name) {
	target.toName = itemOpt[1].name;
	}
	return mergeAll([target, itemOpt[0], itemOpt[1]]);
	});
	}
	}

	type LinesCoords = number[][];

	type LinesValue = OptionDataValue \| OptionDataValue[];

	interface LinesLineStyleOption<TClr> extends LineStyleOption<TClr> {
	curveness?: number
	}

	// @deprecated
	interface LegacyDataItemOption {
	coord: number[]
	name: string
	}

	interface LinesStatesMixin {
	emphasis?: DefaultStatesMixinEmphasis
	}
	export interface LinesStateOption<TCbParams = never> {
	lineStyle?: LinesLineStyleOption<(TCbParams extends never ? never : (params: TCbParams) => ZRColor) \| ZRColor>
	label?: SeriesLineLabelOption
	}

	export interface LinesDataItemOption extends LinesStateOption,
	StatesOptionMixin<LinesStateOption, LinesStatesMixin> {
	name?: string

	fromName?: string
	toName?: string

	symbol?: string[] \| string
	symbolSize?: number[] \| number

	coords?: LinesCoords

	value?: LinesValue

	effect?: LineDrawModelOption['effect']
	}

	export interface LinesSeriesOption
	extends SeriesOption<LinesStateOption, LinesStatesMixin>, LinesStateOption<CallbackDataParams>,
	SeriesOnCartesianOptionMixin, SeriesOnGeoOptionMixin, SeriesOnPolarOptionMixin,
	SeriesOnCalendarOptionMixin, SeriesLargeOptionMixin {

	type?: 'lines'

	coordinateSystem?: string

	symbol?: string[] \| string
	symbolSize?: number[] \| number

	effect?: LineDrawModelOption['effect']

	/**
	* If lines are polyline
	* polyline not support curveness, label, animation
	*/
	polyline?: boolean
	/**
	* If clip the overflow.
	* Available when coordinateSystem is cartesian or polar.
	*/
	clip?: boolean

	data?: LinesDataItemOption[]
	// Stored as a flat array. In format
	// Points Count(2) \| x \| y \| x \| y \| Points Count(3) \| x \| y \| x \| y \| x \| y \|
	\| ArrayLike<number>

	dimensions?: DimensionDefinitionLoose \| DimensionDefinitionLoose[]
	}

	class LinesSeriesModel extends SeriesModel<LinesSeriesOption> {

	static readonly type = 'series.lines';
	readonly type = LinesSeriesModel.type;

	static readonly dependencies = ['grid', 'polar', 'geo', 'calendar'];

	visualStyleAccessPath = 'lineStyle';
	visualDrawType = 'stroke' as const;

	private _flatCoords: ArrayLike<number>;
	private _flatCoordsOffset: ArrayLike<number>;

	init(option: LinesSeriesOption) {
	// The input data may be null/undefined.
	option.data = option.data \|\| [];

	// Not using preprocessor because mergeOption may not have series.type
	compatEc2(option);

	const result = this._processFlatCoordsArray(option.data);
	this._flatCoords = result.flatCoords;
	this._flatCoordsOffset = result.flatCoordsOffset;
	if (result.flatCoords) {
	option.data = new Float32Array(result.count);
	}

	super.init.apply(this, arguments as any);
	}

	mergeOption(option: LinesSeriesOption) {
	compatEc2(option);

	if (option.data) {
	// Only update when have option data to merge.
	const result = this._processFlatCoordsArray(option.data);
	this._flatCoords = result.flatCoords;
	this._flatCoordsOffset = result.flatCoordsOffset;
	if (result.flatCoords) {
	option.data = new Float32Array(result.count);
	}
	}

	super.mergeOption.apply(this, arguments as any);
	}

	appendData(params: Pick<LinesSeriesOption, 'data'>) {
	const result = this._processFlatCoordsArray(params.data);
	if (result.flatCoords) {
	if (!this._flatCoords) {
	this._flatCoords = result.flatCoords;
	this._flatCoordsOffset = result.flatCoordsOffset;
	}
	else {
	this._flatCoords = concatArray(this._flatCoords, result.flatCoords);
	this._flatCoordsOffset = concatArray(this._flatCoordsOffset, result.flatCoordsOffset);
	}
	params.data = new Float32Array(result.count);
	}

	this.getRawData().appendData(params.data);
	}

	_getCoordsFromItemModel(idx: number) {
	const itemModel = this.getData().getItemModel<LinesDataItemOption>(idx);
	const coords = (itemModel.option instanceof Array)
	? itemModel.option : itemModel.getShallow('coords');

	if (__DEV__) {
	if (!(coords instanceof Array && coords.length > 0 && coords[0] instanceof Array)) {
	throw new Error(
	'Invalid coords ' + JSON.stringify(coords) + '. Lines must have 2d coords array in data item.'
	);
	}
	}
	return coords;
	}

	getLineCoordsCount(idx: number) {
	if (this._flatCoordsOffset) {
	return this._flatCoordsOffset[idx * 2 + 1];
	}
	else {
	return this._getCoordsFromItemModel(idx).length;
	}
	}

	getLineCoords(idx: number, out: number[][]) {
	if (this._flatCoordsOffset) {
	const offset = this._flatCoordsOffset[idx * 2];
	const len = this._flatCoordsOffset[idx * 2 + 1];
	for (let i = 0; i < len; i++) {
	out[i] = out[i] \|\| [];
	out[i][0] = this._flatCoords[offset + i * 2];
	out[i][1] = this._flatCoords[offset + i * 2 + 1];
	}
	return len;
	}
	else {
	const coords = this._getCoordsFromItemModel(idx);
	for (let i = 0; i < coords.length; i++) {
	out[i] = out[i] \|\| [];
	out[i][0] = coords[i][0];
	out[i][1] = coords[i][1];
	}
	return coords.length;
	}
	}

	_processFlatCoordsArray(data: LinesSeriesOption['data']) {
	let startOffset = 0;
	if (this._flatCoords) {
	startOffset = this._flatCoords.length;
	}
	// Stored as a typed array. In format
	// Points Count(2) \| x \| y \| x \| y \| Points Count(3) \| x \| y \| x \| y \| x \| y \|
	if (isNumber(data[0])) {
	const len = data.length;
	// Store offset and len of each segment
	const coordsOffsetAndLenStorage = new Uint32Arr(len) as Uint32Array;
	const coordsStorage = new Float64Arr(len) as Float64Array;
	let coordsCursor = 0;
	let offsetCursor = 0;
	let dataCount = 0;
	for (let i = 0; i < len;) {
	dataCount++;
	const count = data[i++] as number;
	// Offset
	coordsOffsetAndLenStorage[offsetCursor++] = coordsCursor + startOffset;
	// Len
	coordsOffsetAndLenStorage[offsetCursor++] = count;
	for (let k = 0; k < count; k++) {
	const x = data[i++] as number;
	const y = data[i++] as number;
	coordsStorage[coordsCursor++] = x;
	coordsStorage[coordsCursor++] = y;

	if (i > len) {
	if (__DEV__) {
	throw new Error('Invalid data format.');
	}
	}
	}
	}

	return {
	flatCoordsOffset: new Uint32Array(coordsOffsetAndLenStorage.buffer, 0, offsetCursor),
	flatCoords: coordsStorage,
	count: dataCount
	};
	}

	return {
	flatCoordsOffset: null,
	flatCoords: null,
	count: data.length
	};
	}

	getInitialData(option: LinesSeriesOption, ecModel: GlobalModel) {
	if (__DEV__) {
	const CoordSys = CoordinateSystem.get(option.coordinateSystem);
	if (!CoordSys) {
	throw new Error('Unknown coordinate system ' + option.coordinateSystem);
	}
	}

	const lineData = new SeriesData(['value'], this);
	lineData.hasItemOption = false;

	lineData.initData(option.data, [], function (dataItem, dimName, dataIndex, dimIndex) {
	// dataItem is simply coords
	if (dataItem instanceof Array) {
	return NaN;
	}
	else {
	lineData.hasItemOption = true;
	const value = dataItem.value;
	if (value != null) {
	return value instanceof Array ? value[dimIndex] : value;
	}
	}
	});

	return lineData;
	}

	formatTooltip(
	dataIndex: number,
	multipleSeries: boolean,
	dataType: string
	) {
	const data = this.getData();
	const itemModel = data.getItemModel<LinesDataItemOption>(dataIndex);
	const name = itemModel.get('name');
	if (name) {
	return name;
	}
	const fromName = itemModel.get('fromName');
	const toName = itemModel.get('toName');
	const nameArr = [];
	fromName != null && nameArr.push(fromName);
	toName != null && nameArr.push(toName);

	return createTooltipMarkup('nameValue', {
	name: nameArr.join(' > ')
	});
	}

	preventIncremental() {
	return !!this.get(['effect', 'show']);
	}

	getProgressive() {
	const progressive = this.option.progressive;
	if (progressive == null) {
	return this.option.large ? 1e4 : this.get('progressive');
	}
	return progressive;
	}

	getProgressiveThreshold() {
	const progressiveThreshold = this.option.progressiveThreshold;
	if (progressiveThreshold == null) {
	return this.option.large ? 2e4 : this.get('progressiveThreshold');
	}
	return progressiveThreshold;
	}

	getZLevelKey() {
	const effectModel = this.getModel('effect');
	const trailLength = effectModel.get('trailLength');
	return this.getData().count() > this.getProgressiveThreshold()
	// Each progressive series has individual key.
	? this.id
	: (effectModel.get('show') && trailLength > 0 ? trailLength + '' : '');
	}

	static defaultOption: LinesSeriesOption = {
	coordinateSystem: 'geo',
	// zlevel: 0,
	z: 2,
	legendHoverLink: true,

	// Cartesian coordinate system
	xAxisIndex: 0,
	yAxisIndex: 0,

	symbol: ['none', 'none'],
	symbolSize: [10, 10],
	// Geo coordinate system
	geoIndex: 0,

	effect: {
	show: false,
	period: 4,
	constantSpeed: 0,
	symbol: 'circle',
	symbolSize: 3,
	loop: true,
	trailLength: 0.2
	},

	large: false,
	// Available when large is true
	largeThreshold: 2000,

	polyline: false,

	clip: true,

	label: {
	show: false,
	position: 'end'
	// distance: 5,
	// formatter: 标签文本格式器，同Tooltip.formatter，不支持异步回调
	},

	lineStyle: {
	opacity: 0.5
	}
	};
	}

	export default LinesSeriesModel;