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import CoreUtils from '../../../modules/CoreUtils'
import Utils from '../../../utils/Utils'
export default class Helpers {
constructor(lineCtx) {
this.w = lineCtx.w
this.lineCtx = lineCtx
}
sameValueSeriesFix(i, series) {
const w = this.w
if (
w.config.fill.type === 'gradient' ||
w.config.fill.type[i] === 'gradient'
) {
const coreUtils = new CoreUtils(this.lineCtx.ctx, w)
// applied only to LINE chart
// a small adjustment to allow gradient line to draw correctly for all same values
/* #fix https://github.com/apexcharts/apexcharts.js/issues/358 */
if (coreUtils.seriesHaveSameValues(i)) {
let gSeries = series[i].slice()
gSeries[gSeries.length - 1] = gSeries[gSeries.length - 1] + 0.000001
series[i] = gSeries
}
}
return series
}
calculatePoints({ series, realIndex, x, y, i, j, prevY }) {
let w = this.w
let ptX = []
let ptY = []
if (j === 0) {
let xPT1st =
this.lineCtx.categoryAxisCorrection + w.config.markers.offsetX
// the first point for line series
// we need to check whether it's not a time series, because a time series may
// start from the middle of the x axis
if (w.globals.isXNumeric) {
xPT1st =
(w.globals.seriesX[realIndex][0] - w.globals.minX) /
this.lineCtx.xRatio +
w.config.markers.offsetX
}
// push 2 points for the first data values
ptX.push(xPT1st)
ptY.push(
Utils.isNumber(series[i][0]) ? prevY + w.config.markers.offsetY : null
)
ptX.push(x + w.config.markers.offsetX)
ptY.push(
Utils.isNumber(series[i][j + 1]) ? y + w.config.markers.offsetY : null
)
} else {
ptX.push(x + w.config.markers.offsetX)
ptY.push(
Utils.isNumber(series[i][j + 1]) ? y + w.config.markers.offsetY : null
)
}
let pointsPos = {
x: ptX,
y: ptY,
}
return pointsPos
}
checkPreviousPaths({ pathFromLine, pathFromArea, realIndex }) {
let w = this.w
for (let pp = 0; pp < w.globals.previousPaths.length; pp++) {
let gpp = w.globals.previousPaths[pp]
if (
(gpp.type === 'line' || gpp.type === 'area') &&
gpp.paths.length > 0 &&
parseInt(gpp.realIndex, 10) === parseInt(realIndex, 10)
) {
if (gpp.type === 'line') {
this.lineCtx.appendPathFrom = false
pathFromLine = w.globals.previousPaths[pp].paths[0].d
} else if (gpp.type === 'area') {
this.lineCtx.appendPathFrom = false
pathFromArea = w.globals.previousPaths[pp].paths[0].d
if (w.config.stroke.show && w.globals.previousPaths[pp].paths[1]) {
pathFromLine = w.globals.previousPaths[pp].paths[1].d
}
}
}
}
return {
pathFromLine,
pathFromArea,
}
}
determineFirstPrevY({ i, realIndex, series, prevY, lineYPosition, translationsIndex }) {
let w = this.w
let stackSeries =
(w.config.chart.stacked && !w.globals.comboCharts) ||
(w.config.chart.stacked &&
w.globals.comboCharts &&
(!this.w.config.chart.stackOnlyBar ||
this.w.config.series[realIndex]?.type === 'bar'
|| this.w.config.series[realIndex]?.type === 'column'))
if (typeof series[i]?.[0] !== 'undefined') {
if (stackSeries) {
if (i > 0) {
// 1st y value of previous series
lineYPosition = this.lineCtx.prevSeriesY[i - 1][0]
} else {
// the first series will not have prevY values
lineYPosition = this.lineCtx.zeroY
}
} else {
lineYPosition = this.lineCtx.zeroY
}
prevY =
lineYPosition -
series[i][0] / this.lineCtx.yRatio[translationsIndex] +
(this.lineCtx.isReversed
? series[i][0] / this.lineCtx.yRatio[translationsIndex] : 0) * 2
} else {
// the first value in the current series is null
if (stackSeries && i > 0 && typeof series[i][0] === 'undefined') {
// check for undefined value (undefined value will occur when we clear the series while user clicks on legend to hide serieses)
for (let s = i - 1; s >= 0; s--) {
// for loop to get to 1st previous value until we get it
if (series[s][0] !== null && typeof series[s][0] !== 'undefined') {
lineYPosition = this.lineCtx.prevSeriesY[s][0]
prevY = lineYPosition
break
}
}
}
}
return {
prevY,
lineYPosition,
}
}
}