forked from Snck3rs/contao-leaflet-maps
70 lines
2.1 KiB
JavaScript
70 lines
2.1 KiB
JavaScript
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/**
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* Extend map so that it can calculate their bounds depending of the features with the property affectBounds.
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*/
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L.Map.include({
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_dynamicBounds: null,
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/**
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* Calculate feature bounds.
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*
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* Use this method without any arguments to scan the whole map for features.
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*
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* If a layer is passed then only this layer is used if the map option adjustBounds is set or the force flag
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* is given.
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*
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* @param {L.Layer} layer Optional limit to a layer.
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* @param {bool} force Force scaning of a layer no matter if adjustBounds is set.
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*
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* @return void
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*/
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calculateFeatureBounds: function(layer, force) {
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if (layer) {
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if (!this.options.adjustBounds && !force) {
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return;
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}
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this._scanForBounds(layer);
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} else {
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this.eachLayer(this._scanForBounds, this);
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}
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if (this._dynamicBounds) {
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this.fitBounds(this._dynamicBounds);
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}
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},
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/**
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* Scan recursively for bounds in a layer and extend _dynamicBounds if any found.
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*
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* @param {L.Layer} layer The layer
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* @private
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*/
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_scanForBounds: function(layer) {
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var source;
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if (layer.feature && layer.feature.properties && layer.feature.properties.affectBounds) {
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if (layer.getBounds) {
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source = layer.getBounds();
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if (source.isValid()) {
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if (this._dynamicBounds) {
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this._dynamicBounds.extend(source);
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} else {
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this._dynamicBounds = L.latLngBounds(source.getSouthWest(), source.getNorthEast());
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}
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}
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} else if (layer.getLatLng) {
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source = layer.getLatLng();
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if (this._dynamicBounds) {
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this._dynamicBounds.extend(source);
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} else {
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this._dynamicBounds = L.latLngBounds(source, source);
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}
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}
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} else if (layer.eachLayer) {
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layer.eachLayer(this._scanForBounds, this);
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}
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}
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});
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