CategoryOverpassFilter: add defaultQuery option

doc/Filters.md

@@ -37,6 +37,7 @@ Each filter can define the following values:
   * 'strsearch' query string parts (e.g. "kai keb" would match "Kaiser Kebap") and query character variants (e.g. "cafe" would match "café").
 * show_default: if true, this filter will be shown by default, others need to be added via the select box.
 * placeholder: a text which is shown as placeholder (Twig enabled)
+* defaultQuery: A filter query which is added when no value is selected.
 
 ### Values
 #### Array

src/CategoryOverpassFilter.js

@@ -139,16 +139,22 @@ class CategoryOverpassFilter {
 
     this.formFilter = new form('filter-' + this.master.id, this.data, masterOptions)
     this.formFilter.show(this.domFilter)
-    this.formFilter.onchange = function () {
+    this.formFilter.onchange = () => {
       let param = JSON.parse(JSON.stringify(this.formFilter.get_data()))
 
       this.applyParam(param)
 
       state.update()
-    }.bind(this)
+    }
 
     this.master.on('setParam', this.setParam.bind(this))
-    this.master.on('applyParam', this.applyParam.bind(this))
+    this.master.on('applyParam', (param) => {
+      this.applyParam(param)
+
+      if (!this.tabFilter.isSelected()) {
+        this.tabFilter.select()
+      }
+    })
     this.master.on('open', this.openCategory.bind(this))
     this.master.on('stateGet', this.stateGet.bind(this))
   }
@@ -227,6 +233,15 @@ class CategoryOverpassFilter {
       }
     }).filter(f => f) // remove null values
 
+    const defaultQueries = Object.keys(this.data)
+      .map(k => {
+        if (!param[k]) {
+          return this.data[k].defaultQuery
+        }
+      })
+      .filter(f => f)
+    this.additionalFilter = this.additionalFilter.concat(defaultQueries)
+
     if (this.additionalFilter.length === 0) {
       this.additionalFilter = []
     } else if (this.additionalFilter.length === 1) {
@@ -244,6 +259,9 @@ class CategoryOverpassFilter {
 
   openCategory () {
     this.formFilter.resize()
+
+    let param = JSON.parse(JSON.stringify(this.formFilter.get_data()))
+    this.applyParam(param)
   }
 
   stateGet (param) {