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vendors/echarts/src/chart/map/mapDataStatistic.js

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+define(function (require) {
+
+    var zrUtil = require('zrender/core/util');
+
+    // FIXME 公用？
+    /**
+     * @param {Array.<module:echarts/data/List>} datas
+     * @param {string} statisticsType 'average' 'sum'
+     * @inner
+     */
+    function dataStatistics(datas, statisticsType) {
+        var dataNameMap = {};
+        var dims = ['value'];
+
+        for (var i = 0; i < datas.length; i++) {
+            datas[i].each(dims, function (value, idx) {
+                var name = datas[i].getName(idx);
+                dataNameMap[name] = dataNameMap[name] || [];
+                if (!isNaN(value)) {
+                    dataNameMap[name].push(value);
+                }
+            });
+        }
+
+        return datas[0].map(dims, function (value, idx) {
+            var name = datas[0].getName(idx);
+            var sum = 0;
+            var min = Infinity;
+            var max = -Infinity;
+            var len = dataNameMap[name].length;
+            for (var i = 0; i < len; i++) {
+                min = Math.min(min, dataNameMap[name][i]);
+                max = Math.max(max, dataNameMap[name][i]);
+                sum += dataNameMap[name][i];
+            }
+            var result;
+            if (statisticsType === 'min') {
+                result = min;
+            }
+            else if (statisticsType === 'max') {
+                result = max;
+            }
+            else if (statisticsType === 'average') {
+                result = sum / len;
+            }
+            else {
+                result = sum;
+            }
+            return len === 0 ? NaN : result;
+        });
+    }
+
+    return function (ecModel) {
+        var seriesGroupByMapType = {};
+        ecModel.eachSeriesByType('map', function (seriesModel) {
+            var mapType = seriesModel.get('map');
+            seriesGroupByMapType[mapType] = seriesGroupByMapType[mapType] || [];
+            seriesGroupByMapType[mapType].push(seriesModel);
+        });
+
+        zrUtil.each(seriesGroupByMapType, function (seriesList, mapType) {
+            var data = dataStatistics(
+                zrUtil.map(seriesList, function (seriesModel) {
+                    return seriesModel.getData();
+                }),
+                seriesList[0].get('mapValueCalculation')
+            );
+
+            seriesList[0].seriesGroup = [];
+
+            seriesList[0].setData(data);
+
+            // FIXME Put where?
+            for (var i = 0; i < seriesList.length; i++) {
+                seriesList[i].seriesGroup = seriesList;
+                seriesList[i].needsDrawMap = i === 0;
+            }
+        });
+    };
+});