@mui/x-charts
Version:
The community edition of MUI X Charts components.
72 lines (69 loc) • 2.23 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.getAxisIndex = getAxisIndex;
exports.getAxisValue = getAxisValue;
var _isBandScale = require("../../../isBandScale");
function getAsANumber(value) {
return value instanceof Date ? value.getTime() : value;
}
/**
* For a pointer coordinate, this function returns the dataIndex associated.
* Returns `-1` if no dataIndex matches.
*/
function getAxisIndex(axisConfig, pointerValue) {
const {
scale,
data: axisData,
reverse
} = axisConfig;
if (!(0, _isBandScale.isBandScale)(scale)) {
const value = scale.invert(pointerValue);
if (axisData === undefined) {
return -1;
}
const valueAsNumber = getAsANumber(value);
const closestIndex = axisData?.findIndex((pointValue, index) => {
const v = getAsANumber(pointValue);
if (v > valueAsNumber) {
if (index === 0 || Math.abs(valueAsNumber - v) <= Math.abs(valueAsNumber - getAsANumber(axisData[index - 1]))) {
return true;
}
}
if (v <= valueAsNumber) {
if (index === axisData.length - 1 || Math.abs(getAsANumber(value) - v) < Math.abs(getAsANumber(value) - getAsANumber(axisData[index + 1]))) {
return true;
}
}
return false;
});
return closestIndex;
}
const dataIndex = scale.bandwidth() === 0 ? Math.floor((pointerValue - Math.min(...scale.range()) + scale.step() / 2) / scale.step()) : Math.floor((pointerValue - Math.min(...scale.range())) / scale.step());
if (dataIndex < 0 || dataIndex >= axisData.length) {
return -1;
}
return reverse ? axisData.length - 1 - dataIndex : dataIndex;
}
/**
* For a pointer coordinate, this function returns the value associated.
* Returns `null` if the coordinate has no value associated.
*/
function getAxisValue(axisConfig, pointerValue, dataIndex) {
const {
scale,
data: axisData
} = axisConfig;
if (!(0, _isBandScale.isBandScale)(scale)) {
const value = scale.invert(pointerValue);
if (dataIndex < 0) {
return value;
}
return axisData[dataIndex];
}
if (dataIndex < 0 || dataIndex >= axisData.length) {
return null;
}
return axisData[dataIndex];
}