@antv/g2plot/esm/components/label/state.js

G2 Plot, a market of plots built with the Grammar of Graphics'

import * as _ from '@antv/util';
import { compare } from '../../base/controller/state';
// 对label和label样式进行缓存
var labels;
var originAttrs;
function onActive(plot, condition) {
    if (!labels) {
        getAllLabels(plot);
    }
    _.each(labels, function (label, index) {
        var origin = label.get('origin');
        if (compare(origin, condition)) {
            var originAttr = originAttrs[index];
            var style = _.mix({}, originAttr, { opacity: 1 });
            label.attr(style);
        }
    });
}
function onDisable(plot, condition) {
    if (!labels) {
        getAllLabels(plot);
    }
    _.each(labels, function (label, index) {
        var origin = label.get('origin');
        if (compare(origin, condition)) {
            var originAttr = originAttrs[index];
            var disableStyle = labelDisableStyle(originAttr);
            label.attr(disableStyle);
        }
    });
}
function getAllLabels(plot) {
    labels = [];
    originAttrs = [];
    var geoms = plot.view.get('elements');
    _.each(geoms, function (geom) {
        var geomLabels = geom.get('labels');
        if (geomLabels) {
            _.each(geomLabels, function (label) {
                labels.push(label);
                originAttrs.push(label.attr());
            });
        }
    });
}
function labelDisableStyle(style) {
    var opacity = style.opacity || 1;
    return { opacity: opacity * 0.2 };
}
export default {
    active: onActive,
    selected: onActive,
    disable: onDisable,
};
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