devextreme
Version:
JavaScript/TypeScript Component Suite for Responsive Web Development
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JavaScript
/**
* DevExtreme (cjs/__internal/viz/translators/category_translator.js)
* Version: 25.2.7
* Build date: Tue May 05 2026
*
* Copyright (c) 2012 - 2026 Developer Express Inc. ALL RIGHTS RESERVED
* Read about DevExtreme licensing here: https://js.devexpress.com/Licensing/
*/
"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = void 0;
var _math = require("../../../core/utils/math");
var _type = require("../../../core/utils/type");
const {
round: round
} = Math;
function getValue(value) {
return value
}
const MIN_VALID_SCALE_OFFSET = .05;
var _default = exports.default = {
translate(category, directionOffset) {
const canvasOptions = this._canvasOptions;
const categoryIndex = this._categoriesToPoints[null === category || void 0 === category ? void 0 : category.valueOf()];
const specialValue = this.translateSpecialCase(category);
const startPointIndex = canvasOptions.startPointIndex || 0;
const stickInterval = this._options.stick ? 0 : .5;
if ((0, _type.isDefined)(specialValue)) {
return round(specialValue)
}
if (!categoryIndex && 0 !== categoryIndex) {
return null
}
directionOffset = directionOffset || 0;
const stickDelta = categoryIndex + stickInterval - startPointIndex + .5 * directionOffset;
return round(this._calculateProjection(canvasOptions.interval * stickDelta))
},
getInterval() {
return this._canvasOptions.interval
},
getEventScale(zoomEvent) {
const scale = zoomEvent.deltaScale || 1;
return 1 - (1 - scale) / (.75 + this.visibleCategories.length / this._categories.length)
},
zoom(translate, scale) {
const scaleOffset = Math.abs(Math.abs(scale) - 1);
const isZoomIn = scale > 1;
if (1 !== scale && scaleOffset < .05) {
scale = this.getMinScale(isZoomIn)
}
const categories = this._categories;
const canvasOptions = this._canvasOptions;
const {
stick: stick
} = this._options;
const {
invert: invert
} = canvasOptions;
const interval = canvasOptions.interval * scale;
const translateCategories = translate / interval;
const visibleCount = (this.visibleCategories || []).length;
let startCategoryIndex = parseInt((canvasOptions.startPointIndex || 0) + translateCategories + .5);
const categoriesLength = parseInt((0, _math.adjust)(canvasOptions.canvasLength / interval) + (stick ? 1 : 0)) || 1;
let endCategoryIndex;
if (invert) {
startCategoryIndex = parseInt((canvasOptions.startPointIndex || 0) + visibleCount - translateCategories + .5) - categoriesLength
}
if (startCategoryIndex < 0) {
startCategoryIndex = 0
}
endCategoryIndex = startCategoryIndex + categoriesLength;
if (endCategoryIndex > categories.length) {
endCategoryIndex = categories.length;
startCategoryIndex = endCategoryIndex - categoriesLength;
if (startCategoryIndex < 0) {
startCategoryIndex = 0
}
}
const newVisibleCategories = categories.slice(parseInt(startCategoryIndex), parseInt(endCategoryIndex));
const newInterval = this._getDiscreteInterval(newVisibleCategories.length, canvasOptions);
scale = newInterval / canvasOptions.interval;
translate = this.translate(!invert ? newVisibleCategories[0] : newVisibleCategories[newVisibleCategories.length - 1]) * scale - (canvasOptions.startPoint + (stick ? 0 : newInterval / 2));
return {
min: newVisibleCategories[0],
max: newVisibleCategories[newVisibleCategories.length - 1],
translate: translate,
scale: scale
}
},
getMinScale(zoom) {
const canvasOptions = this._canvasOptions;
let categoriesLength = (this.visibleCategories || this._categories).length;
categoriesLength += (parseInt(.1 * categoriesLength) || 1) * (zoom ? -2 : 2);
return canvasOptions.canvasLength / (Math.max(categoriesLength, 1) * canvasOptions.interval)
},
getScale(min, max) {
const canvasOptions = this._canvasOptions;
const visibleArea = this.getCanvasVisibleArea();
const stickOffset = !this._options.stick && 1;
let minPoint = (0, _type.isDefined)(min) ? this.translate(min, -stickOffset) : null;
let maxPoint = (0, _type.isDefined)(max) ? this.translate(max, +stickOffset) : null;
if (null === minPoint) {
minPoint = canvasOptions.invert ? visibleArea.max : visibleArea.min
}
if (null === maxPoint) {
maxPoint = canvasOptions.invert ? visibleArea.min : visibleArea.max
}
return this.canvasLength / Math.abs(maxPoint - minPoint)
},
isValid(value) {
return (0, _type.isDefined)(value) ? this._categoriesToPoints[value.valueOf()] >= 0 : false
},
getCorrectValue: getValue,
to(value, direction) {
const canvasOptions = this._canvasOptions;
const categoryIndex = this._categoriesToPoints[null === value || void 0 === value ? void 0 : value.valueOf()];
const startPointIndex = canvasOptions.startPointIndex || 0;
const stickDelta = categoryIndex + (this._options.stick ? 0 : .5) - startPointIndex + (this._businessRange.invert ? -1 : 1) * direction * .5;
return round(this._calculateProjection(canvasOptions.interval * stickDelta))
},
from(position) {
let direction = arguments.length > 1 && void 0 !== arguments[1] ? arguments[1] : 0;
const canvasOptions = this._canvasOptions;
const {
startPoint: startPoint
} = canvasOptions;
const categories = this.visibleCategories || this._categories;
const categoriesLength = categories.length;
const stickInterval = this._options.stick ? .5 : 0;
let result = round((position - startPoint) / canvasOptions.interval + stickInterval - .5 - .5 * direction);
if (result >= categoriesLength) {
result = categoriesLength - 1
}
if (result < 0) {
result = 0
}
if (canvasOptions.invert) {
result = categoriesLength - result - 1
}
return categories[result]
},
_add: () => NaN,
toValue: getValue,
isValueProlonged: true,
getRangeByMinZoomValue(minZoom, visualRange) {
const categories = this._categories;
const minVisibleIndex = categories.indexOf(visualRange.minVisible);
const maxVisibleIndex = categories.indexOf(visualRange.maxVisible);
const startIndex = minVisibleIndex + minZoom - 1;
const endIndex = maxVisibleIndex - minZoom + 1;
if (categories[startIndex]) {
return [visualRange.minVisible, categories[startIndex]]
}
return [categories[endIndex], visualRange.maxVisible]
}
};