diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/components/TimeLine.vue | 11 | ||||
| -rw-r--r-- | src/lib.ts | 30 |
2 files changed, 33 insertions, 8 deletions
diff --git a/src/components/TimeLine.vue b/src/components/TimeLine.vue index 373439a..18ae107 100644 --- a/src/components/TimeLine.vue +++ b/src/components/TimeLine.vue @@ -88,7 +88,8 @@ import {moduloPositive, animateWithClass, getTextWidth} from '../util'; import { getDaysInMonth, MIN_CAL_DATE, MONTH_NAMES, HistDate, HistEvent, getImagePath, dateToYearStr, dateToTickStr, MIN_DATE, MAX_DATE, MONTH_SCALE, DAY_SCALE, SCALES, - stepDate, getScaleRatio, getNumSubUnits, getUnitDiff, getEventPrecision, dateToUnit, dateToScaleDate, + stepDate, getScaleRatio, getNumSubUnits, getUnitDiff, getEventPrecision, getScaleForJump, + dateToUnit, dateToScaleDate, TimelineState, } from '../lib'; import {useStore} from '../store'; @@ -1332,12 +1333,8 @@ watch(() => props.searchTarget, () => { if (!idToPos.value.has(event.id)){ // If not already visible // Determine new time range - let tempScale = scale.value; - let targetDate = event.start; - if (targetDate.isEarlier(MIN_CAL_DATE) && tempScale < 1){ // Account for jumping out of calendar limits - tempScale = getEventPrecision(event); - } - targetDate = dateToScaleDate(targetDate, tempScale); + let tempScale = getScaleForJump(event); + let targetDate = dateToScaleDate(event.start, tempScale); const startEndDiff = getUnitDiff(startDate.value, endDate.value, scale.value); let targetStart = stepDate(targetDate, tempScale, {forward: false, count: Math.floor(startEndDiff / 2)}); if (targetStart.isEarlier(MIN_DATE)){ @@ -628,7 +628,7 @@ export function getUnitDiff(date: HistDate, date2: HistDate, scale: number): num } } -// Returns smallest scale at which 'event's start-startUpper range is within one unit, or infinity +// Returns smallest scale at which 'event's start-startUpper range is within one unit, or infinity if there is none export function getEventPrecision(event: HistEvent): number { // Note: Intentionally not adding an exception for century and millenia ranges like // 101 to 200 (as opposed to 100 to 199) being interpreted as 'within' one 100/1000-year scale unit @@ -649,6 +649,34 @@ export function getEventPrecision(event: HistEvent): number { return Number.POSITIVE_INFINITY; } +// Returns an 'appropriate' scale to use when jumping to a target date +export function getScaleForJump(event: HistEvent): number { + const start = event.start; + const startUpper = event.startUpper; + if (start.gcal != null){ + if (start.day > 1){ + return MONTH_SCALE; // Intentionally not using DAY_SCALE + } else if (start.month > 1 + || startUpper != null // Account for month-precision events + && gregorianToJdn(start.year, start.month+1, 0) + == gregorianToJdn(startUpper.year, startUpper.month, startUpper.day)){ + return MONTH_SCALE; + } + } + for (let scaleIdx = 0; scaleIdx < SCALES.length - 2; scaleIdx++){ + const scale = SCALES[scaleIdx]; + if ((scale == 100 || scale == 1e3) // Account for century/millenium-precision events + && moduloPositive(start.year - 1, scale) == 0 && startUpper != null + && startUpper.year == start.year + scale - 1 || start.year + scale - 1 == 0){ // Account for no 0 BC + return scale; + } + if (moduloPositive(start.year, scale) == 0){ + return scale; + } + } + throw new Error('Invalid state'); +} + export function dateToUnit(date: HistDate, scale: number): number { // For a YearDate and sub-yearly scale, uses the first day of the YearDate's year if (scale >= 1){ |