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feat: x-axis display future time tick
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| @@ -0,0 +1,133 @@ | ||
| /** | ||
| * Licensed 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 type { KLineData } from './Data' | ||
| import type Nullable from './Nullable' | ||
| import type { TextStyle } from './Styles' | ||
| import { calcTextWidth } from './utils/canvas' | ||
| import { formatTimestampToDateTime, type DateTime } from './utils/format' | ||
| import { isNumber, isValid } from './utils/typeChecks' | ||
|
|
||
| export default interface TimeWeightTick { | ||
| weight: number | ||
| dataIndex: number | ||
| timestamp: number | ||
| } | ||
|
|
||
| export const TimeWeightConstants = { | ||
| Year: 365 * 24 * 3600, | ||
| Month: 30 * 24 * 3600, | ||
| Day: 24 * 3600, | ||
| Hour: 3600, | ||
| Minute: 60, | ||
| Second: 1 | ||
| } | ||
|
|
||
| export function classifyTimeWeightTicks ( | ||
| map: Map<number, TimeWeightTick[]>, | ||
| dataList: Array<Pick<KLineData, 'timestamp'>>, | ||
| dateTimeFormat: Intl.DateTimeFormat, | ||
| baseDataIndex = 0, | ||
| minTimeDifference?: { value: number }, | ||
| startTimestamp?: Nullable<number> | ||
| ): void { | ||
| let prevDateTime: Nullable<DateTime> = null | ||
| let prevTimestamp: Nullable<number> = startTimestamp ?? null | ||
| for (let i = 0; i < dataList.length; i++) { | ||
| const timestamp = dataList[i].timestamp | ||
| let weight = TimeWeightConstants.Second | ||
| const dateTime = formatTimestampToDateTime(dateTimeFormat, timestamp) | ||
| if (isValid(prevDateTime)) { | ||
| if (dateTime.YYYY !== prevDateTime.YYYY) { | ||
| weight = TimeWeightConstants.Year | ||
| } else if (dateTime.MM !== prevDateTime.MM) { | ||
| weight = TimeWeightConstants.Month | ||
| } else if (dateTime.DD !== prevDateTime.DD) { | ||
| weight = TimeWeightConstants.Day | ||
| } else if (dateTime.HH !== prevDateTime.HH) { | ||
| weight = TimeWeightConstants.Hour | ||
| } else if (dateTime.mm !== prevDateTime.mm) { | ||
| weight = TimeWeightConstants.Minute | ||
| } else { | ||
| weight = TimeWeightConstants.Second | ||
| } | ||
| } | ||
| if (isNumber(prevTimestamp) && isNumber(minTimeDifference?.value)) { | ||
| minTimeDifference.value = Math.min(minTimeDifference.value, timestamp - prevTimestamp) | ||
| } | ||
| const currentTimeWeightList = map.get(weight) ?? [] | ||
| currentTimeWeightList.push({ dataIndex: i + baseDataIndex, weight, timestamp }) | ||
| map.set(weight, currentTimeWeightList) | ||
| prevDateTime = dateTime | ||
| prevTimestamp = timestamp | ||
| } | ||
| } | ||
|
|
||
| export function calcBetweenTimeWeightTickBarCount ( | ||
| barSpace: number, | ||
| textStyles: Partial<Pick<TextStyle, 'size' | 'weight' | 'family'>> | ||
| ): number { | ||
| const space = Math.max(calcTextWidth('0000-00-00 00:00:00', textStyles.size, textStyles.weight, textStyles.family), 146) | ||
| return Math.ceil(space / barSpace) | ||
| } | ||
|
|
||
| export function createTimeWeightTickList ( | ||
| map: Map<number, TimeWeightTick[]>, | ||
| barSpace: number, | ||
| textStyles: Partial<Pick<TextStyle, 'size' | 'weight' | 'family'>> | ||
| ): TimeWeightTick[] { | ||
| const barCount = calcBetweenTimeWeightTickBarCount(barSpace, textStyles) | ||
| let optTimeWeightTickList: TimeWeightTick[] = [] | ||
| Array.from(map.keys()).sort((w1, w2) => w2 - w1).forEach(weight => { | ||
| const currentTimeWeightTickList = map.get(weight)! | ||
| const prevOptTimeWeightTickList = optTimeWeightTickList | ||
| optTimeWeightTickList = [] | ||
|
|
||
| const prevOptTimeWeightTickListLength = prevOptTimeWeightTickList.length | ||
| let prevOptTimeWeightTickListPointer = 0 | ||
| const currentTimeWeightTickListLength = currentTimeWeightTickList.length | ||
|
|
||
| let rightIndex = Infinity | ||
| let leftIndex = -Infinity | ||
| for (let i = 0; i < currentTimeWeightTickListLength; i++) { | ||
| const timeWeightTick = currentTimeWeightTickList[i] | ||
| const currentIndex = timeWeightTick.dataIndex | ||
|
|
||
| while (prevOptTimeWeightTickListPointer < prevOptTimeWeightTickListLength) { | ||
| const lastTimeWeightTick = prevOptTimeWeightTickList[prevOptTimeWeightTickListPointer] | ||
| const lastIndex = lastTimeWeightTick.dataIndex | ||
| if (lastIndex < currentIndex) { | ||
| prevOptTimeWeightTickListPointer++ | ||
| optTimeWeightTickList.push(lastTimeWeightTick) | ||
| leftIndex = lastIndex | ||
| rightIndex = Infinity | ||
| } else { | ||
| rightIndex = lastIndex | ||
| break | ||
| } | ||
| } | ||
|
|
||
| if (rightIndex - currentIndex >= barCount && currentIndex - leftIndex >= barCount) { | ||
| optTimeWeightTickList.push(timeWeightTick) | ||
| leftIndex = currentIndex | ||
| } | ||
| } | ||
|
|
||
| for (; prevOptTimeWeightTickListPointer < prevOptTimeWeightTickListLength; prevOptTimeWeightTickListPointer++) { | ||
| optTimeWeightTickList.push(prevOptTimeWeightTickList[prevOptTimeWeightTickListPointer]) | ||
| } | ||
| }) | ||
|
|
||
| return optTimeWeightTickList | ||
| } |
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