Method getStyleByData

src/openlayers/overlay/Range.js:91–124

* @private * @function Range.prototype.getStyleByData * @description 通过数据获取 style。 * @param {Object} fea - 要素数据。

(fea)

     * @param {Object} fea - 要素数据。
     */
    getStyleByData(fea) {
        var style = {};
        var feature = fea;
        style = CommonUtil.copyAttributesWithClip(style, this.style);
        if (this.themeField && this.styleGroups && this.styleGroups.length > 0 && feature.attributes) {
            var Sf = this.themeField;
            var Attrs = feature.attributes;
            var Gro = this.styleGroups;
            var isSfInAttrs = false; //指定的 themeField 是否是 feature 的属性字段之一
            var attr = null; //属性值

            for (var property in Attrs) {
                if (Sf === property) {
                    isSfInAttrs = true;
                    attr = Attrs[property];
                    break;
                }
            }
            //判断属性值是否属于styleGroups的某一个范围，以便对获取分组 style
            if (isSfInAttrs) {
                for (var i = 0, len = Gro.length; i < len; i++) {
                    if ((attr >= Gro[i].start) && (attr < Gro[i].end)) {
                        //feature.style = Util.copyAttributes(feature.style, this.defaultStyle);
                        var sty1 = Gro[i].style;
                        style = CommonUtil.copyAttributesWithClip(style, sty1);
                    }
                }
            }
        }
        if (feature.style && this.isAllowFeatureStyle === true) {
            style = CommonUtil.copyAttributesWithClip(feature.style);
        }
        return style;
    }

    canvasFunctionInternal_(extent, resolution, pixelRatio, size, projection) { // eslint-disable-line no-unused-vars
        return GeoFeature.prototype.canvasFunctionInternal_.apply(this, arguments);