Support geo uri

data/maps.desktop.in

@@ -8,7 +8,9 @@ Categories=GTK;Utility;Science;Maps
 Keywords=trip;explore;
 
 Icon=io.elementary.maps
-Exec=io.elementary.maps
+Exec=io.elementary.maps %u
 SingleMainWindow=true
 StartupNotify=true
 Terminal=false
+
+MimeType=x-scheme-handler/geo;

data/maps.metainfo.xml.in

@@ -65,6 +65,7 @@
         </ul>
       </description>
       <issues>
+        <issue url="https://github.com/elementary/maps/issues/108">Handle geo:// uri scheme</issue>
         <issue url="https://github.com/elementary/maps/issues/125">Can't navigate from Search to results with the keyboard</issue>
         <issue url="https://github.com/elementary/maps/issues/150">Can't type space character in Search</issue>
       </issues>

src/Application.vala

@@ -16,7 +16,7 @@ public class Maps.Application : Adw.Application {
     public Application () {
         Object (
             application_id: "io.elementary.maps",
-            flags: ApplicationFlags.DEFAULT_FLAGS
+            flags: ApplicationFlags.HANDLES_OPEN
         );
     }
 
@@ -65,6 +65,22 @@ public class Maps.Application : Adw.Application {
         add_action (style_action);
     }
 
+    protected override void open (File[] files, string hint) {
+        activate ();
+
+        if (files.length == 0) {
+            return;
+        }
+
+        var file = files[0];
+        if (!file.has_uri_scheme ("geo")) {
+            critical ("no geo uri scheme");
+            return;
+        }
+
+        ((MainWindow) active_window).go_to_uri (file.get_uri ());
+    }
+
     protected override void startup () {
         /*
          * Granite.init() calls Gdk.DisplayManager.get() internally without

src/MainWindow.vala

@@ -239,7 +239,7 @@ public class Maps.MainWindow : Adw.ApplicationWindow {
 
         search_listview.activate.connect ((pos) => {
             var place = (Geocode.Place) selection_model.get_item (pos);
-            map_widget.go_to_place (place);
+            map_widget.go_to_location (place.location);
             search_res_popover.popdown ();
         });
 
@@ -255,6 +255,25 @@ public class Maps.MainWindow : Adw.ApplicationWindow {
         destroy ();
     }
 
+    public void go_to_uri (string uri) {
+        try {
+            map_widget.go_to_uri (uri);
+        } catch (Error e) {
+            var error_dialog = new Granite.MessageDialog (
+                _("Couldn't open location"),
+                _("Maps wasn't able to parse “%s”. Please report this using the Feedback app.").printf (uri),
+                new ThemedIcon ("find-location")
+            ) {
+                badge_icon = new ThemedIcon ("dialog-error"),
+                modal = true,
+                transient_for = this
+            };
+            error_dialog.show_error_details (e.message);
+            error_dialog.response.connect (error_dialog.destroy);
+            error_dialog.present ();
+        }
+    }
+
     private void on_search_activate () {
         search_entry.grab_focus ();
     }

src/MapWidget.vala

@@ -54,6 +54,10 @@ public class Maps.MapWidget : Gtk.Box {
 
     // Set the initial location of the map widget.
     private void set_init_place () {
+        if (base_map.viewport.latitude != 0 || base_map.viewport.longitude != 0) {
+            return;
+        }
+
         Shumate.MapSource map_source = map_widget.map_source;
 
         double latitude = Maps.Application.settings.get_double ("latitude");
@@ -136,12 +140,19 @@ public class Maps.MapWidget : Gtk.Box {
         base_map.go_to_full (location.latitude, location.longitude, DEFAULT_ZOOM_LEVEL);
     }
 
-    public void go_to_place (Geocode.Place place) {
-        Geocode.Location loc = place.location;
+    public void go_to_uri (string uri) throws Error {
+        var location = new Geocode.Location (base_map.viewport.latitude, base_map.viewport.longitude);
 
-        clear_pin ();
-        mark_pin_at (loc.latitude, loc.longitude);
-        base_map.go_to (loc.latitude, loc.longitude);
+        // we get an uri that looks like geo:///lat,lon, remove slashes
+        location.set_from_uri (uri.replace ("///", ""));
+
+        go_to_location (location);
+    }
+
+    public void go_to_location (Geocode.Location location) {
+        pin_layer.remove_all ();
+        mark_pin_at (location.latitude, location.longitude);
+        base_map.go_to_full (location.latitude, location.longitude, DEFAULT_ZOOM_LEVEL);
     }
 
     // Saves the latest state of the map.
@@ -155,10 +166,6 @@ public class Maps.MapWidget : Gtk.Box {
         location_layer.remove_all ();
     }
 
-    private void clear_pin () {
-        pin_layer.remove_all ();
-    }
-
     private void mark_location_at (double latitude, double longitude) {
         var marker = new Shumate.Point () {
             latitude = latitude,