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define(function (require) {
var zrUtil = require('zrender/core/util');
return function (ecModel) {
var processedMapType = {};
ecModel.eachSeriesByType('map', function (mapSeries) {
var mapType = mapSeries.get('map');
if (processedMapType[mapType]) {
return;
}
var mapSymbolOffsets = {};
zrUtil.each(mapSeries.seriesGroup, function (subMapSeries) {
var geo = subMapSeries.coordinateSystem;
var data = subMapSeries.getData();
if (subMapSeries.get('showLegendSymbol') && ecModel.getComponent('legend')) {
data.each('value', function (value, idx) {
var name = data.getName(idx);
var region = geo.getRegion(name);
// No region or no value
// In MapSeries data regions will be filled with NaN
// If they are not in the series.data array.
// So here must validate if value is NaN
if (!region || isNaN(value)) {
return;
}
var offset = mapSymbolOffsets[name] || 0;
var point = geo.dataToPoint(region.center);
mapSymbolOffsets[name] = offset + 1;
data.setItemLayout(idx, {
point: point,
offset: offset
});
});
}
});
// Show label of those region not has legendSymbol(which is offset 0)
var data = mapSeries.getData();
data.each(function (idx) {
var name = data.getName(idx);
var layout = data.getItemLayout(idx) || {};
layout.showLabel = !mapSymbolOffsets[name];
data.setItemLayout(idx, layout);
});
processedMapType[mapType] = true;
});
};
});