@antv/scale
Version:
Toolkit for mapping abstract data into visual representation.
64 lines • 2.31 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.findTickInterval = void 0;
const time_interval_1 = require("./time-interval");
const utc_interval_1 = require("./utc-interval");
const bisect_1 = require("./bisect");
const ticks_1 = require("./ticks");
function chooseTickIntervals(utc) {
const intervalMap = utc ? utc_interval_1.utcIntervalMap : time_interval_1.localIntervalMap;
const { year, month, week, day, hour, minute, second, millisecond } = intervalMap;
const tickIntervals = [
[second, 1],
[second, 5],
[second, 15],
[second, 30],
[minute, 1],
[minute, 5],
[minute, 15],
[minute, 30],
[hour, 1],
[hour, 3],
[hour, 6],
[hour, 12],
[day, 1],
[day, 2],
[week, 1],
[month, 1],
[month, 3],
[year, 1],
];
return {
tickIntervals,
year,
millisecond,
};
}
function findTickInterval(start, stop, count, interval, utc) {
const lo = +start;
const hi = +stop;
const { tickIntervals, year, millisecond } = chooseTickIntervals(utc);
const getter = ([interval, count]) => interval.duration * count;
const targetCount = interval ? (hi - lo) / interval : count || 5;
const targetInterval = interval || (hi - lo) / targetCount;
const len = tickIntervals.length;
const i = (0, bisect_1.bisect)(tickIntervals, targetInterval, 0, len, getter);
let matchInterval;
if (i === len) {
const step = (0, ticks_1.tickStep)(lo / year.duration, hi / year.duration, targetCount);
matchInterval = [year, step];
}
else if (i) {
const closeToLow = targetInterval / getter(tickIntervals[i - 1]) < getter(tickIntervals[i]) / targetInterval;
const [timeInterval, targetStep] = closeToLow ? tickIntervals[i - 1] : tickIntervals[i];
const step = interval ? Math.ceil(interval / timeInterval.duration) : targetStep;
matchInterval = [timeInterval, step];
}
else {
const step = Math.max((0, ticks_1.tickStep)(lo, hi, targetCount), 1);
matchInterval = [millisecond, step];
}
return matchInterval;
}
exports.findTickInterval = findTickInterval;
//# sourceMappingURL=find-tick-interval.js.map