devextreme
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HTML5 JavaScript Component Suite for Responsive Web Development
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JavaScript
/**
* DevExtreme (viz/series/helpers/range_data_calculator.js)
* Version: 18.2.18
* Build date: Tue Oct 18 2022
*
* Copyright (c) 2012 - 2022 Developer Express Inc. ALL RIGHTS RESERVED
* Read about DevExtreme licensing here: https://js.devexpress.com/Licensing/
*/
;
var unique = require("../../core/utils").unique,
_isDefined = require("../../../core/utils/type").isDefined,
noop = require("../../../core/utils/common").noop,
DISCRETE = "discrete";
function continuousRangeCalculator(range, minValue, maxValue) {
range.min = range.min < minValue ? range.min : minValue;
range.max = range.max > maxValue ? range.max : maxValue
}
function getRangeCalculator(axisType, axis) {
if (axisType === DISCRETE) {
return function(range, minValue, maxValue) {
if (minValue !== maxValue) {
range.categories.push(maxValue)
}
range.categories.push(minValue)
}
}
if (axis) {
return function(range, value) {
var interval = axis.calculateInterval(value, range.prevValue),
minInterval = range.interval;
range.interval = (minInterval < interval ? minInterval : interval) || minInterval;
range.prevValue = value;
continuousRangeCalculator(range, value, value)
}
}
return continuousRangeCalculator
}
function getInitialRange(axisType, dataType, firstValue) {
var range = {
axisType: axisType,
dataType: dataType
};
if (axisType === DISCRETE) {
range.categories = []
} else {
range.min = firstValue;
range.max = firstValue
}
return range
}
function processCategories(range) {
if (range.categories) {
range.categories = unique(range.categories)
}
}
function getValueForArgument(point, extraPoint, x, range) {
if (extraPoint && _isDefined(extraPoint.value) && "datetime" !== range.dataType) {
var y1 = point.value,
y2 = extraPoint.value,
x1 = point.argument,
x2 = extraPoint.argument;
return (x - x1) * (y2 - y1) / (x2 - x1) + y1
} else {
return point.value
}
}
function getViewPortFilter(viewport) {
if (viewport.categories) {
var dictionary = viewport.categories.reduce(function(result, category) {
result[category.valueOf()] = true;
return result
}, {});
return function(argument) {
return dictionary[argument.valueOf()]
}
}
if (!_isDefined(viewport.startValue) && !_isDefined(viewport.endValue)) {
return function() {
return true
}
}
if (!_isDefined(viewport.endValue)) {
return function(argument) {
return argument >= viewport.startValue
}
}
if (!_isDefined(viewport.startValue)) {
return function(argument) {
return argument <= viewport.endValue
}
}
return function(argument) {
return argument >= viewport.startValue && argument <= viewport.endValue
}
}
function calculateRangeBetweenPoints(rangeCalculator, range, point, prevPoint, bound) {
var value = getValueForArgument(point, prevPoint, bound, range);
rangeCalculator(range, value, value)
}
function isLineSeries(series) {
return series.type.toLowerCase().indexOf("line") >= 0 || series.type.toLowerCase().indexOf("area") >= 0
}
function getViewportReducer(series) {
var viewportFilter, rangeCalculator = getRangeCalculator(series.valueAxisType),
viewport = series.getArgumentAxis() && series.getArgumentAxis().visualRange() || {},
calculatePointBetweenPoints = isLineSeries(series) ? calculateRangeBetweenPoints : noop;
viewportFilter = getViewPortFilter(viewport);
return function(range, point, index, points) {
var argument = point.argument;
if (!point.hasValue()) {
return range
}
if (viewportFilter(argument)) {
if (!range.startCalc) {
range.startCalc = true;
calculatePointBetweenPoints(rangeCalculator, range, point, points[index - 1], viewport.startValue)
}
rangeCalculator(range, point.getMinValue(), point.getMaxValue())
} else {
if (!viewport.categories && _isDefined(viewport.startValue) && argument > viewport.startValue) {
if (!range.startCalc) {
calculatePointBetweenPoints(rangeCalculator, range, point, points[index - 1], viewport.startValue)
}
range.endCalc = true;
calculatePointBetweenPoints(rangeCalculator, range, point, points[index - 1], viewport.endValue)
}
}
return range
}
}
module.exports = {
getArgumentRange: function(series) {
var data = series._data || [],
range = {};
if (data.length) {
if (series.argumentAxisType === DISCRETE) {
range = {
categories: data.map(function(item) {
return item.argument
})
}
} else {
var interval = void 0;
if (data.length > 1) {
var i1 = series.getArgumentAxis().calculateInterval(data[0].argument, data[1].argument);
var i2 = series.getArgumentAxis().calculateInterval(data[data.length - 1].argument, data[data.length - 2].argument);
interval = Math.min(i1, i2)
}
range = {
min: data[0].argument,
max: data[data.length - 1].argument,
interval: interval
}
}
}
return range
},
getRangeData: function(series) {
var points = series.getPoints(),
useAggregation = series.useAggregation(),
argumentCalculator = getRangeCalculator(series.argumentAxisType, points.length > 1 && series.getArgumentAxis()),
valueRangeCalculator = getRangeCalculator(series.valueAxisType),
viewportReducer = getViewportReducer(series),
range = points.reduce(function(range, point, index, points) {
var argument = point.argument;
argumentCalculator(range.arg, argument, argument);
if (point.hasValue()) {
valueRangeCalculator(range.val, point.getMinValue(), point.getMaxValue());
viewportReducer(range.viewport, point, index, points)
}
return range
}, {
arg: getInitialRange(series.argumentAxisType, series.argumentType, points.length ? points[0].argument : void 0),
val: getInitialRange(series.valueAxisType, series.valueType, points.length ? series.getValueRangeInitialValue() : void 0),
viewport: getInitialRange(series.valueAxisType, series.valueType, points.length ? series.getValueRangeInitialValue() : void 0)
});
if (useAggregation) {
var argumentRange = this.getArgumentRange(series);
if (series.argumentAxisType === DISCRETE) {
range.arg = argumentRange
} else {
var viewport = series.getArgumentAxis().getViewport();
if (_isDefined(viewport.startValue) || _isDefined(viewport.length)) {
argumentCalculator(range.arg, argumentRange.min, argumentRange.min)
}
if (_isDefined(viewport.endValue) || _isDefined(viewport.length) && _isDefined(viewport.startValue)) {
argumentCalculator(range.arg, argumentRange.max, argumentRange.max)
}
}
}
processCategories(range.arg);
processCategories(range.val);
return range
},
getViewport: function(series) {
var reducer, points = series.getPoints(),
range = {};
reducer = getViewportReducer(series);
range = getInitialRange(series.valueAxisType, series.valueType, points.length ? series.getValueRangeInitialValue() : void 0);
points.some(function(point, index) {
reducer(range, point, index, points);
return range.endCalc
});
return range
},
getPointsInViewPort: function(series) {
var argumentViewPortFilter = getViewPortFilter(series.getArgumentAxis().visualRange() || {}),
valueViewPort = series.getValueAxis().visualRange() || {},
valueViewPortFilter = getViewPortFilter(valueViewPort),
points = series.getPoints(),
addValue = function(values, point, isEdge) {
var minValue = point.getMinValue(),
maxValue = point.getMaxValue(),
isMinValueInViewPort = valueViewPortFilter(minValue),
isMaxValueInViewPort = valueViewPortFilter(maxValue);
if (isMinValueInViewPort) {
values.push(minValue)
}
if (maxValue !== minValue && isMaxValueInViewPort) {
values.push(maxValue)
}
if (isEdge && !isMinValueInViewPort && !isMaxValueInViewPort) {
if (!values.length) {
values.push(valueViewPort.startValue)
} else {
values.push(valueViewPort.endValue)
}
}
},
addEdgePoints = isLineSeries(series) ? function(result, points, index) {
var point = points[index],
prevPoint = points[index - 1],
nextPoint = points[index + 1];
if (nextPoint && argumentViewPortFilter(nextPoint.argument)) {
addValue(result[1], point, true)
}
if (prevPoint && argumentViewPortFilter(prevPoint.argument)) {
addValue(result[1], point, true)
}
} : noop,
checkPointInViewport = function(result, point, index) {
if (argumentViewPortFilter(point.argument)) {
addValue(result[0], point)
} else {
addEdgePoints(result, points, index)
}
return result
};
return points.reduce(checkPointInViewport, [
[],
[]
])
}
};