forked from zhurui/management
104 lines
3.7 KiB
JavaScript
104 lines
3.7 KiB
JavaScript
|
|
/*
|
|
* 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.
|
|
*/
|
|
|
|
var numberUtil = require("../util/number");
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
|
|
/**
|
|
* For testable.
|
|
*/
|
|
var roundNumber = numberUtil.round;
|
|
/**
|
|
* @param {Array.<number>} extent Both extent[0] and extent[1] should be valid number.
|
|
* Should be extent[0] < extent[1].
|
|
* @param {number} splitNumber splitNumber should be >= 1.
|
|
* @param {number} [minInterval]
|
|
* @param {number} [maxInterval]
|
|
* @return {Object} {interval, intervalPrecision, niceTickExtent}
|
|
*/
|
|
|
|
function intervalScaleNiceTicks(extent, splitNumber, minInterval, maxInterval) {
|
|
var result = {};
|
|
var span = extent[1] - extent[0];
|
|
var interval = result.interval = numberUtil.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 = [roundNumber(Math.ceil(extent[0] / interval) * interval, precision), roundNumber(Math.floor(extent[1] / interval) * interval, precision)];
|
|
fixExtent(niceTickExtent, extent);
|
|
return result;
|
|
}
|
|
/**
|
|
* @param {number} interval
|
|
* @return {number} interval precision
|
|
*/
|
|
|
|
|
|
function getIntervalPrecision(interval) {
|
|
// Tow more digital for tick.
|
|
return numberUtil.getPrecisionSafe(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.
|
|
|
|
|
|
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];
|
|
}
|
|
}
|
|
|
|
exports.intervalScaleNiceTicks = intervalScaleNiceTicks;
|
|
exports.getIntervalPrecision = getIntervalPrecision;
|
|
exports.fixExtent = fixExtent; |