[gnome-maps/wip/mlundblad/place-zoom-levels: 3/4] WIP: Add module for place zoom levels

[Marcus Lundblad <mlundblad src gnome org>]

commit 40f022956ddf8487ede08d993a3ba967c6d0ee65
Author: Marcus Lundblad <ml update uu se>
Date:   Mon Nov 29 22:47:27 2021 +0100

    WIP: Add module for place zoom levels
    
    Add utility module to define default
    zoom levels for place types.

 src/org.gnome.Maps.src.gresource.xml.in |  1 +
 src/placeZoom.js                        | 62 +++++++++++++++++++++++++++++++++
 2 files changed, 63 insertions(+)
---
diff --git a/src/org.gnome.Maps.src.gresource.xml.in b/src/org.gnome.Maps.src.gresource.xml.in
index 2338a132..da8266e7 100644
--- a/src/org.gnome.Maps.src.gresource.xml.in
+++ b/src/org.gnome.Maps.src.gresource.xml.in
@@ -68,6 +68,7 @@
     <file>placeStore.js</file>
     <file>placeView.js</file>
     <file>placeViewImage.js</file>
+    <file>placeZoom.js</file>
     <file>printLayout.js</file>
     <file>printOperation.js</file>
     <file>route.js</file>
diff --git a/src/placeZoom.js b/src/placeZoom.js
new file mode 100644
index 00000000..5cf38a35
--- /dev/null
+++ b/src/placeZoom.js
@@ -0,0 +1,62 @@
+/* -*- Mode: JS2; indent-tabs-mode: nil; js2-basic-offset: 4 -*- */
+/* vim: set et ts=4 sw=4: */
+/*
+ * Copyright (c) 2021 Marcus Lundblad
+ *
+ * GNOME Maps is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * GNOME Maps is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with GNOME Maps; if not, see <http://www.gnu.org/licenses/>.
+ *
+ * Author: Marcus Lundblad <ml update uu se>
+ */
+
+const TYPE_ZOOM_MAP = {
+    amenity: {
+        _:           17
+    },
+    highway: {
+        bus_stop:    17
+    },
+    place: {
+        continent:    4,
+        ocean:        4,
+        sea:          5,
+        country:      6,
+        state:        7,
+        region:       8,
+        province:     8,
+        county:       8,
+        municipality: 8,
+        island:       9,
+        city:        10,
+        town:        12,
+        borough:     12,
+        village:     15,
+        suburb:      15,
+        hamlet:      15,
+        _:           17
+
+    },
+    railway: {
+        halt:        16,
+        station:     14,
+        tram_stop:   16
+    },
+    shop: {
+        _:           17
+    }
+}
+
+function getZoomLevelForPlace(place) {
+    return TYPE_ZOOM_MAP?.[place.osmKey]?.[place.osmValue] ??
+           TYPE_ZOOM_MAP?.[place.osmKey]?.['_'];
+}