src/component/marker/MarkAreaView.js

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// TODO Better on polar
define(function (require) {

    var zrUtil = require('zrender/core/util');
    var List = require('../../data/List');
    var numberUtil = require('../../util/number');
    var graphic = require('../../util/graphic');
    var colorUtil = require('zrender/tool/color');

    var markerHelper = require('./markerHelper');

    var markAreaTransform = function (seriesModel, coordSys, maModel, item) {
        var lt = markerHelper.dataTransform(seriesModel, item[0]);
        var rb = markerHelper.dataTransform(seriesModel, item[1]);
        var retrieve = zrUtil.retrieve;

        // FIXME make sure lt is less than rb
        var ltCoord = lt.coord;
        var rbCoord = rb.coord;
        ltCoord[0] = retrieve(ltCoord[0], -Infinity);
        ltCoord[1] = retrieve(ltCoord[1], -Infinity);

        rbCoord[0] = retrieve(rbCoord[0], Infinity);
        rbCoord[1] = retrieve(rbCoord[1], Infinity);

        // Merge option into one
        var result = zrUtil.mergeAll([{}, lt, rb]);

        result.coord = [
            lt.coord, rb.coord
        ];
        result.x0 = lt.x;
        result.y0 = lt.y;
        result.x1 = rb.x;
        result.y1 = rb.y;
        return result;
    };

    function isInifinity(val) {
        return !isNaN(val) && !isFinite(val);
    }

    // If a markArea has one dim
    function ifMarkLineHasOnlyDim(dimIndex, fromCoord, toCoord, coordSys) {
        var otherDimIndex = 1 - dimIndex;
        return isInifinity(fromCoord[otherDimIndex]) && isInifinity(toCoord[otherDimIndex]);
    }

    function markAreaFilter(coordSys, item) {
        var fromCoord = item.coord[0];
        var toCoord = item.coord[1];
        if (coordSys.type === 'cartesian2d') {
            // In case
            // {
            //  markArea: {
            //    data: [{ yAxis: 2 }]
            //  }
            // }
            if (
                fromCoord && toCoord &&