devextreme/dist/transpiled/viz/tree_map/colorizing.range.js

HTML5 JavaScript Component Suite for Responsive Web Development

"use strict";

var _createColorCodeGetter = require("./colorizing").createColorCodeGetter;

function getPaletteIndex(value, items) {
    var start = 0,
        end = items.length - 1,
        index = -1,
        middle;
    if (items[start] <= value && value <= items[end]) {
        if (value === items[end]) {
            index = end - 1;
        } else {
            while (end - start > 1) {
                middle = start + end >> 1;
                if (value < items[middle]) {
                    end = middle;
                } else {
                    start = middle;
                }
            }
            index = start;
        }
    }
    return index;
}

function rangeColorizer(options, themeManager) {
    var range = options.range || [],
        palette = themeManager.createDiscretePalette(options.palette, range.length - 1),
        getValue = _createColorCodeGetter(options);

    return function (node) {
        return palette.getColor(getPaletteIndex(getValue(node), range));
    };
}

require("./colorizing").addColorizer("range", rangeColorizer);
module.exports = rangeColorizer;