@jiaminghi/charts/src/core/grid.js

Lightweight charting

import { doUpdate } from '../class/updater.class'

import { deepClone } from '@jiaminghi/c-render/lib/plugin/util'

import { gridConfig } from '../config'

import { deepMerge } from '../util'

export function grid (chart, option = {}) {
  let { grid } = option

  grid = deepMerge(deepClone(gridConfig, true), grid || {})

  doUpdate({
    chart,
    series: [grid],
    key: 'grid',
    getGraphConfig: getGridConfig
  })
}

function getGridConfig (gridItem, updater) {
  const { animationCurve, animationFrame, rLevel } = gridItem

  const shape = getGridShape(gridItem, updater)
  const style = getGridStyle(gridItem)

  updater.chart.gridArea = { ...shape }

  return [{
    name: 'rect',
    index: rLevel,
    animationCurve,
    animationFrame,
    shape,
    style
  }]
}

function getGridShape (gridItem, updater) {
  const [w, h] = updater.chart.render.area

  const left = getNumberValue(gridItem.left, w)
  const right = getNumberValue(gridItem.right, w)
  const top = getNumberValue(gridItem.top, h)
  const bottom = getNumberValue(gridItem.bottom, h)

  const width = w - left - right
  const height = h - top - bottom

  return { x: left, y: top, w: width, h: height }
}

function getNumberValue (val, all) {
  if (typeof val === 'number') return val

  if (typeof val !== 'string') return 0

  return all * parseInt(val) / 100
}

function getGridStyle (gridItem) {
  const { style } = gridItem

  return style
}