Messaging: Handle geo uri scheme

Change-Id: I19f1039d18441cb2bd013577c41e279327f806e6
2025-01-01 18:56:09 +01:00
parent 7f639e3652
commit 66d57e98a3
2 changed files with 84 additions and 2 deletions
@@ -0,0 +1,82 @@
+/*
+ * SPDX-FileCopyrightText: 2025 The LineageOS Project
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package com.android.messaging.util;
+
+import android.text.SpannableString;
+import android.text.style.URLSpan;
+import android.text.util.Linkify;
+import android.util.Log;
+import android.widget.TextView;
+
+import androidx.core.util.Pair;
+
+import java.util.ArrayList;
+import java.util.regex.Pattern;
+
+/*
+ * Helper class to support Linkify-ing the geo uri scheme, see
+ * https://en.wikipedia.org/wiki/Geo_URI_scheme
+ */
+public class LinkifyHelper {
+    public final static String TAG = "LinkifyHelper";
+    public final static boolean VERBOSE = false;
+
+    private final static Pattern GEO_URL_PATTERN =
+            Pattern.compile("geo:([\\-0-9.]+),([\\-0-9.]+)(?:,([\\-0-9.]+))?(?:\\?(.*))?",
+                    Pattern.CASE_INSENSITIVE);
+
+
+    // This could have been simpler, but Linkify.addLinks() removes existing links
+    // and PHONE_NUMBERS also matches parts of the geo-url
+    public static boolean addLinks(TextView text) {
+        boolean ret;
+
+        // We need to add and know the geo spans first since Linkify will replace them with
+        // phone numbers - therefore we remove those later and replace them with the geo ones
+        // again
+        Linkify.addLinks(text, GEO_URL_PATTERN, null);
+        SpannableString geoSpannable = SpannableString.valueOf(text.getText());
+        final URLSpan[] geoSpans = geoSpannable.getSpans(0, geoSpannable.length(), URLSpan.class);
+
+        ArrayList<Pair<Integer, Integer>> geoSpanPairs = new ArrayList<>();
+        for (URLSpan geoSpan : geoSpans) {
+            geoSpanPairs.add(new Pair<>(geoSpannable.getSpanStart(geoSpan),
+                    geoSpannable.getSpanEnd(geoSpan)));
+        }
+
+        // We want "ALL" but that's deprecated due to Linkify.MAP_ADDRESSES
+        int mask = Linkify.WEB_URLS | Linkify.EMAIL_ADDRESSES | Linkify.PHONE_NUMBERS;
+
+        // This will remove our existing spans
+        ret = Linkify.addLinks(text, mask);
+        SpannableString s = SpannableString.valueOf(text.getText());
+
+        if (geoSpans.length > 0) {
+            ret = true;
+            final URLSpan[] allSpans = s.getSpans(0, s.length(), URLSpan.class);
+            for (int i = allSpans.length - 1; i >= 0; i--) {
+                int spanStart = s.getSpanStart(allSpans[i]);
+                int spanEnd = s.getSpanEnd(allSpans[i]);
+                for (Pair<Integer, Integer> pair : geoSpanPairs) {
+                    if (spanStart >= pair.first && spanStart <= pair.second) {
+                        // We have found a span within a geo span
+                        if (VERBOSE) {
+                            Log.d(TAG, "Removing span between " + spanStart + " and " + spanEnd +
+                                    " since it's in range of a geo span (" + pair.first + ", " +
+                                    pair.second + ")");
+                        }
+                        s.removeSpan(allSpans[i]);
+                    }
+                }
+            }
+            text.setText(s);
+            // Add the geo spans again
+            Linkify.addLinks(text, GEO_URL_PATTERN, null);
+        }
+
+        return ret;
+    }
+}