Basic GPX support via Leaflet

MANIFEST.in

@@ -31,3 +31,7 @@ recursive-include docs Makefile
 recursive-include invenio_previewer_geospatial *.html
 recursive-include invenio_previewer_geospatial/translations *.po *.pot *.mo
 recursive-include tests *.py
+
+# added by check-manifest
+recursive-include invenio_previewer_geospatial *.css
+recursive-include invenio_previewer_geospatial *.js

invenio_previewer_geospatial/assets/semantic-ui/css/invenio_previewer_geospatial/gpx.css

@@ -0,0 +1,6 @@
+@import "leaflet/dist/leaflet.css";
+
+#map {
+  width: 100%;
+  height: 480px;
+}

invenio_previewer_geospatial/assets/semantic-ui/js/invenio_previewer_geospatial/gpx.js

@@ -0,0 +1,30 @@
+import L from "leaflet"
+import 'leaflet-gpx';
+import "leaflet/dist/leaflet.css";
+
+document.addEventListener("DOMContentLoaded", () => {
+  const mapElement = document.getElementById("map");
+  const gpxFileUri = mapElement.getAttribute("data-file-uri")
+  const gpxUrl = new URL(gpxFileUri, window.location.href);
+
+  const map = L.map('map').setView([0, 0], 13);
+
+  L.tileLayer('https://tile.openstreetmap.org/{z}/{x}/{y}.png', {
+    maxZoom: 19,
+    attribution: '&copy; <a href="http://www.openstreetmap.org/copyright">OpenStreetMap</a>'
+  }).addTo(map);
+
+  new L.GPX(gpxUrl.href, {
+    async: true,
+    gpx_options: {
+      parseElements: ['track', 'route']
+    },
+    markers: {
+      // TODO: Figure out how to display stock images from leaflet-gpx
+      startIcon: null,
+      endIcon: null
+    }
+  }).on('loaded', (e) => {
+    map.fitBounds(e.target.getBounds());
+  }).addTo(map);
+});

invenio_previewer_geospatial/extensions/__init__.py

@@ -0,0 +1,3 @@
+# -*- coding: utf-8 -*-
+
+"""Geospatial Previewers."""

invenio_previewer_geospatial/extensions/gpx.py

@@ -0,0 +1,21 @@
+"""GPX Previewer."""
+
+from flask import render_template
+from invenio_previewer.proxies import current_previewer
+
+previewable_extensions = ["gpx"]
+
+
+def can_preview(file):
+    """Check if file can be previewed."""
+    return file.is_local() and file.has_extensions(".gpx")
+
+
+def preview(file):
+    """Render the GPX template."""
+    return render_template(
+        "invenio_previewer_geospatial/gpx.html",
+        file=file,
+        js_bundles=current_previewer.js_bundles + ["gpx_js.js"],
+        css_bundles=current_previewer.css_bundles + ["gpx_css.css"],
+    )

invenio_previewer_geospatial/templates/semantic-ui/invenio_previewer_geospatial/gpx.html

@@ -0,0 +1,5 @@
+{%- extends config.PREVIEWER_ABSTRACT_TEMPLATE %}
+
+{% block panel %}
+  <div id="map" data-file-uri="{{ file.uri }}"></div>
+{% endblock %}

invenio_previewer_geospatial/webpack.py

@@ -0,0 +1,18 @@
+"""JS/CSS Webpack bundles for Invenio Previewer Geospatial."""
+
+from invenio_assets.webpack import WebpackThemeBundle
+
+theme = WebpackThemeBundle(
+    __name__,
+    "assets",
+    default="semantic-ui",
+    themes={
+        "semantic-ui": dict(
+            entry={
+                "gpx_js": "./js/invenio_previewer_geospatial/gpx.js",
+                "gpx_css": "./css/invenio_previewer_geospatial/gpx.css",
+            },
+            dependencies={"leaflet": "^1.9.4", "leaflet-gpx": "^2.1.2"},
+        ),
+    },
+)

setup.cfg

@@ -29,6 +29,7 @@ zip_safe = False
 install_requires =
     invenio-base>=1.2.5,<2.0.0
     invenio-i18n>=2.0.0,<3.0.0
+    invenio-previewer>=2.0.0,<3.0.0
 
 [options.extras_require]
 tests =
@@ -44,6 +45,10 @@ invenio_base.blueprints =
     invenio_previewer_geospatial = invenio_previewer_geospatial.views:blueprint
 invenio_i18n.translations =
     messages = invenio_previewer_geospatial
+invenio_assets.webpack =
+    invenio_previewer_geospatial = invenio_previewer_geospatial.webpack:theme
+invenio_previewer.previewers =
+    gpx = invenio_previewer_geospatial.extensions.gpx
 
 [build_sphinx]
 source-dir = docs/