bd028579
 易尊强
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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
*/
/**
* AUTO-GENERATED FILE. DO NOT MODIFY.
*/
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 { getPrecision, round, nice, quantityExponent } from '../util/number.js';
export function isValueNice(val) {
var exp10 = Math.pow(10, quantityExponent(Math.abs(val)));
var f = Math.abs(val / exp10);
return f === 0 || f === 1 || f === 2 || f === 3 || f === 5;
}
export function isIntervalOrLogScale(scale) {
return scale.type === 'interval' || scale.type === 'log';
}
/**
* @param extent Both extent[0] and extent[1] should be valid number.
* Should be extent[0] < extent[1].
* @param splitNumber splitNumber should be >= 1.
*/
export function intervalScaleNiceTicks(extent, splitNumber, minInterval, maxInterval) {
var result = {};
var span = extent[1] - extent[0];
var interval = result.interval = nice(span / splitNumber, true);
if (minInterval != null && interval < minInterval) {
interval = result.interval = minInterval;
}
if (maxInterval != null && interval > maxInterval) {
interval = result.interval = maxInterval;
}
// Tow more digital for tick.
var precision = result.intervalPrecision = getIntervalPrecision(interval);
// Niced extent inside original extent
var niceTickExtent = result.niceTickExtent = [round(Math.ceil(extent[0] / interval) * interval, precision), round(Math.floor(extent[1] / interval) * interval, precision)];
fixExtent(niceTickExtent, extent);
return result;
}
export function increaseInterval(interval) {
var exp10 = Math.pow(10, quantityExponent(interval));
// Increase interval
var f = interval / exp10;
if (!f) {
f = 1;
} else if (f === 2) {
f = 3;
} else if (f === 3) {
f = 5;
} else {
// f is 1 or 5
f *= 2;
}
return round(f * exp10);
}
/**
* @return interval precision
*/
export function getIntervalPrecision(interval) {
// Tow more digital for tick.
return getPrecision(interval) + 2;
}
function clamp(niceTickExtent, idx, extent) {
niceTickExtent[idx] = Math.max(Math.min(niceTickExtent[idx], extent[1]), extent[0]);
}
// In some cases (e.g., splitNumber is 1), niceTickExtent may be out of extent.
export function fixExtent(niceTickExtent, extent) {
!isFinite(niceTickExtent[0]) && (niceTickExtent[0] = extent[0]);
!isFinite(niceTickExtent[1]) && (niceTickExtent[1] = extent[1]);
clamp(niceTickExtent, 0, extent);
clamp(niceTickExtent, 1, extent);
if (niceTickExtent[0] > niceTickExtent[1]) {
niceTickExtent[0] = niceTickExtent[1];
}
}
export function contain(val, extent) {
return val >= extent[0] && val <= extent[1];
}
export function normalize(val, extent) {
if (extent[1] === extent[0]) {
return 0.5;
}
return (val - extent[0]) / (extent[1] - extent[0]);
}
export function scale(val, extent) {
return val * (extent[1] - extent[0]) + extent[0];
}
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