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frontend/node_modules/echarts/lib/scale/Log.js

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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 { __extends } from "tslib";
+import * as zrUtil from 'zrender/lib/core/util.js';
+import Scale from './Scale.js';
+import * as numberUtil from '../util/number.js';
+import * as scaleHelper from './helper.js';
+// Use some method of IntervalScale
+import IntervalScale from './Interval.js';
+var scaleProto = Scale.prototype;
+// FIXME:TS refactor: not good to call it directly with `this`?
+var intervalScaleProto = IntervalScale.prototype;
+var roundingErrorFix = numberUtil.round;
+var mathFloor = Math.floor;
+var mathCeil = Math.ceil;
+var mathPow = Math.pow;
+var mathLog = Math.log;
+var LogScale = /** @class */function (_super) {
+  __extends(LogScale, _super);
+  function LogScale() {
+    var _this = _super !== null && _super.apply(this, arguments) || this;
+    _this.type = 'log';
+    _this.base = 10;
+    _this._originalScale = new IntervalScale();
+    // FIXME:TS actually used by `IntervalScale`
+    _this._interval = 0;
+    return _this;
+  }
+  /**
+   * @param Whether expand the ticks to niced extent.
+   */
+  LogScale.prototype.getTicks = function (expandToNicedExtent) {
+    var originalScale = this._originalScale;
+    var extent = this._extent;
+    var originalExtent = originalScale.getExtent();
+    var ticks = intervalScaleProto.getTicks.call(this, expandToNicedExtent);
+    return zrUtil.map(ticks, function (tick) {
+      var val = tick.value;
+      var powVal = numberUtil.round(mathPow(this.base, val));
+      // Fix #4158
+      powVal = val === extent[0] && this._fixMin ? fixRoundingError(powVal, originalExtent[0]) : powVal;
+      powVal = val === extent[1] && this._fixMax ? fixRoundingError(powVal, originalExtent[1]) : powVal;
+      return {
+        value: powVal
+      };
+    }, this);
+  };
+  LogScale.prototype.setExtent = function (start, end) {
+    var base = mathLog(this.base);
+    // log(-Infinity) is NaN, so safe guard here
+    start = mathLog(Math.max(0, start)) / base;
+    end = mathLog(Math.max(0, end)) / base;
+    intervalScaleProto.setExtent.call(this, start, end);
+  };
+  /**
+   * @return {number} end
+   */
+  LogScale.prototype.getExtent = function () {
+    var base = this.base;
+    var extent = scaleProto.getExtent.call(this);
+    extent[0] = mathPow(base, extent[0]);
+    extent[1] = mathPow(base, extent[1]);
+    // Fix #4158
+    var originalScale = this._originalScale;
+    var originalExtent = originalScale.getExtent();
+    this._fixMin && (extent[0] = fixRoundingError(extent[0], originalExtent[0]));
+    this._fixMax && (extent[1] = fixRoundingError(extent[1], originalExtent[1]));
+    return extent;
+  };
+  LogScale.prototype.unionExtent = function (extent) {
+    this._originalScale.unionExtent(extent);
+    var base = this.base;
+    extent[0] = mathLog(extent[0]) / mathLog(base);
+    extent[1] = mathLog(extent[1]) / mathLog(base);
+    scaleProto.unionExtent.call(this, extent);
+  };
+  LogScale.prototype.unionExtentFromData = function (data, dim) {
+    // TODO
+    // filter value that <= 0
+    this.unionExtent(data.getApproximateExtent(dim));
+  };
+  /**
+   * Update interval and extent of intervals for nice ticks
+   * @param approxTickNum default 10 Given approx tick number
+   */
+  LogScale.prototype.calcNiceTicks = function (approxTickNum) {
+    approxTickNum = approxTickNum || 10;
+    var extent = this._extent;
+    var span = extent[1] - extent[0];
+    if (span === Infinity || span <= 0) {
+      return;
+    }
+    var interval = numberUtil.quantity(span);
+    var err = approxTickNum / span * interval;
+    // Filter ticks to get closer to the desired count.
+    if (err <= 0.5) {
+      interval *= 10;
+    }
+    // Interval should be integer
+    while (!isNaN(interval) && Math.abs(interval) < 1 && Math.abs(interval) > 0) {
+      interval *= 10;
+    }
+    var niceExtent = [numberUtil.round(mathCeil(extent[0] / interval) * interval), numberUtil.round(mathFloor(extent[1] / interval) * interval)];
+    this._interval = interval;
+    this._niceExtent = niceExtent;
+  };
+  LogScale.prototype.calcNiceExtent = function (opt) {
+    intervalScaleProto.calcNiceExtent.call(this, opt);
+    this._fixMin = opt.fixMin;
+    this._fixMax = opt.fixMax;
+  };
+  LogScale.prototype.parse = function (val) {
+    return val;
+  };
+  LogScale.prototype.contain = function (val) {
+    val = mathLog(val) / mathLog(this.base);
+    return scaleHelper.contain(val, this._extent);
+  };
+  LogScale.prototype.normalize = function (val) {
+    val = mathLog(val) / mathLog(this.base);
+    return scaleHelper.normalize(val, this._extent);
+  };
+  LogScale.prototype.scale = function (val) {
+    val = scaleHelper.scale(val, this._extent);
+    return mathPow(this.base, val);
+  };
+  LogScale.type = 'log';
+  return LogScale;
+}(Scale);
+var proto = LogScale.prototype;
+proto.getMinorTicks = intervalScaleProto.getMinorTicks;
+proto.getLabel = intervalScaleProto.getLabel;
+function fixRoundingError(val, originalVal) {
+  return roundingErrorFix(val, numberUtil.getPrecision(originalVal));
+}
+Scale.registerClass(LogScale);
+export default LogScale;