helper.js
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/*
* 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.
*/
import {isDimensionStacked} from '../../data/helper/dataStackHelper';
import {map} from 'zrender/src/core/util';
/**
* @param {Object} coordSys
* @param {module:echarts/data/List} data
* @param {string} valueOrigin lineSeries.option.areaStyle.origin
*/
export function prepareDataCoordInfo(coordSys, data, valueOrigin) {
var baseAxis = coordSys.getBaseAxis();
var valueAxis = coordSys.getOtherAxis(baseAxis);
var valueStart = getValueStart(valueAxis, valueOrigin);
var baseAxisDim = baseAxis.dim;
var valueAxisDim = valueAxis.dim;
var valueDim = data.mapDimension(valueAxisDim);
var baseDim = data.mapDimension(baseAxisDim);
var baseDataOffset = valueAxisDim === 'x' || valueAxisDim === 'radius' ? 1 : 0;
var dims = map(coordSys.dimensions, function (coordDim) {
return data.mapDimension(coordDim);
});
var stacked;
var stackResultDim = data.getCalculationInfo('stackResultDimension');
if (stacked |= isDimensionStacked(data, dims[0] /*, dims[1]*/)) { // jshint ignore:line
dims[0] = stackResultDim;
}
if (stacked |= isDimensionStacked(data, dims[1] /*, dims[0]*/)) { // jshint ignore:line
dims[1] = stackResultDim;
}
return {
dataDimsForPoint: dims,
valueStart: valueStart,
valueAxisDim: valueAxisDim,
baseAxisDim: baseAxisDim,
stacked: !!stacked,
valueDim: valueDim,
baseDim: baseDim,
baseDataOffset: baseDataOffset,
stackedOverDimension: data.getCalculationInfo('stackedOverDimension')
};
}
function getValueStart(valueAxis, valueOrigin) {
var valueStart = 0;
var extent = valueAxis.scale.getExtent();
if (valueOrigin === 'start') {
valueStart = extent[0];
}
else if (valueOrigin === 'end') {
valueStart = extent[1];
}
// auto
else {
// Both positive
if (extent[0] > 0) {
valueStart = extent[0];
}
// Both negative
else if (extent[1] < 0) {
valueStart = extent[1];
}
// If is one positive, and one negative, onZero shall be true
}
return valueStart;
}
export function getStackedOnPoint(dataCoordInfo, coordSys, data, idx) {
var value = NaN;
if (dataCoordInfo.stacked) {
value = data.get(data.getCalculationInfo('stackedOverDimension'), idx);
}
if (isNaN(value)) {
value = dataCoordInfo.valueStart;
}
var baseDataOffset = dataCoordInfo.baseDataOffset;
var stackedData = [];
stackedData[baseDataOffset] = data.get(dataCoordInfo.baseDim, idx);
stackedData[1 - baseDataOffset] = value;
return coordSys.dataToPoint(stackedData);
}