/**
* Copyright (c) 2018-present clchart Contributors.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*
*/
import getValue from '../data/cl.data.tools'
// 和定位相关基本函数
/** @module ChartTools */
/**
* According to the label in the data to find a matching record number
* @export
* @param {Object} data
* @param {Number} findvalue
* @param {String} label
* @return {Number}
*/
export function findLabelToIndex (data, findvalue, label) {
for (let idx = 0; idx <= data.value.length - 1; idx++) {
if (findvalue === getValue(data, label, idx)) {
return idx
}
}
return -1
}
// 查找最匹配time的记录号，direction为forword的时候表示从后面向前开始寻找，
/**
* Find the record number that matches the time. When the direction is forword, it means to start looking from behind.
* @export
* @param {Object} data
* @param {Number} findvalue
* @param {String} label
* @param {String} direction
* @return {Number}
*/
export function findNearTimeToIndex (data, findvalue, label, direction) {
if (label === undefined) label = 'time'
if (direction && direction === 'forword') {
for (let idx = data.value.length - 1; idx >= 0; idx--) {
if (getValue(data, label, idx) > findvalue) continue
return idx
}
} else {
for (let idx = 0; idx <= data.value.length - 1; idx++) {
if (getValue(data, label, idx) < findvalue) continue
return idx
}
}
return -1
}
/**
* Specifically dealing with the time-sharing map and the 5-day map all this data will be smaller than the interface, in this case elementW is generally only one pixel
* @export
* @param {Object} info
* @param {Object} config
*/
export function setFixedLineFlags (info, config) {
info.showMode = 'fixed'
info.fixed = {
min: 0,
max: config.maxCount - 1,
left: 0,
right: 0
}
info.minIndex = 0
info.maxIndex = config.size - 1
// 5日线时 spaceX初始值设为0
info.maxCount = config.maxCount > 1 ? config.maxCount : 2
info.unitX = config.scale
info.spaceX = config.width / info.maxCount - info.unitX
}
/**
* In this case spaceX requires a minimum of one pixel
* @export
* @param {Object} info
* @param {Object} config
*/
export function setMoveLineFlags (info, config) {
const spaceX = info.unitX / 4
info.spaceX = spaceX < config.scale ? config.scale : spaceX
info.maxCount = Math.floor(config.width / (info.unitX + info.spaceX)) // 整个图形区域最大显示记录数
const offset = info.maxCount > config.size ? config.size : info.maxCount
switch (info.showMode) {
case 'fixed':
// 要根据fixed的最大最小值，合并数据
info.maxIndex = config.size - 1
info.minIndex = config.size - offset
break
case 'locked':
// info.locked.index = config.index ? config.index : info.locked.index;
// 把需要锁定的记录初始化，如果没有值就取当前画面中间的值
// info.locked.set = config.set ? config.set : info.locked.set;
break
case 'move':
break
default: // case 'last':
info.maxIndex = config.size - 1
info.minIndex = config.size - offset
break
}
}