1 files changed, 54 insertions, 0 deletions
diff --git a/src/main/java/de/thedevstack/conversationsplus/utils/ui/TextViewUtil.java b/src/main/java/de/thedevstack/conversationsplus/utils/ui/TextViewUtil.java
index 0d4b065a..9840ce41 100644
--- a/src/main/java/de/thedevstack/conversationsplus/utils/ui/TextViewUtil.java
+++ b/src/main/java/de/thedevstack/conversationsplus/utils/ui/TextViewUtil.java
@@ -2,15 +2,47 @@ package de.thedevstack.conversationsplus.utils.ui;
 
 import android.support.annotation.ColorRes;
 import android.support.annotation.StringRes;
+import android.text.util.Linkify;
+import android.util.Patterns;
 import android.view.View;
 import android.widget.TextView;
 
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
 import de.thedevstack.conversationsplus.ConversationsPlusColors;
 
 /**
  *
  */
 public final class TextViewUtil extends ViewUtil {
+    public static void linkifyXmpp(TextView tv) {
+        int patternMatchCount = 0;
+        int oldAutoLinkMask = tv.getAutoLinkMask();
+        CharSequence body = tv.getText();
+
+        // first check if we have a match on XMPP_PATTERN so we do not have to check for EMAIL_ADDRESSES
+        patternMatchCount += countMatches(XMPP_PATTERN, body);
+        if ((Linkify.EMAIL_ADDRESSES & oldAutoLinkMask) != 0 && patternMatchCount > 0) {
+            oldAutoLinkMask -= Linkify.EMAIL_ADDRESSES;
+        }
+
+        // count matches for all patterns
+        if ((Linkify.WEB_URLS & oldAutoLinkMask) != 0) {
+            patternMatchCount += countMatches(Patterns.WEB_URL, body);
+        }
+        if ((Linkify.EMAIL_ADDRESSES & oldAutoLinkMask) != 0) {
+            patternMatchCount += countMatches(Patterns.EMAIL_ADDRESS, body);
+        }
+        if ((Linkify.PHONE_NUMBERS & oldAutoLinkMask) != 0) {
+            patternMatchCount += countMatches(Patterns.PHONE, body);
+        }
+
+        tv.setTextIsSelectable(patternMatchCount <= 1);
+        tv.setAutoLinkMask(0);
+        Linkify.addLinks(tv, XMPP_PATTERN, "xmpp");
+        tv.setAutoLinkMask(oldAutoLinkMask);
+    }
 
     public static void setTextWithoutAutoLink(TextView tv, CharSequence text) {
         int oldAutoLinkMask = tv.getAutoLinkMask();
@@ -103,6 +135,28 @@ public final class TextViewUtil extends ViewUtil {
         }
     }
 
+    /**
+     * Counts the number of occurrences of the pattern in body.
+     *
+     * @param pattern the pattern to match
+     * @param body    the body to find the pattern
+     * @return the number of occurrences
+     */
+    private static int countMatches(Pattern pattern, CharSequence body) {
+        Matcher matcher = pattern.matcher(body);
+        int count = 0;
+        while (matcher.find()) {
+            count++;
+        }
+        return count;
+    }
+
+    private static final Pattern XMPP_PATTERN = Pattern
+            .compile("xmpp\\:(?:(?:["
+                    + Patterns.GOOD_IRI_CHAR
+                    + "\\;\\/\\?\\@\\&\\=\\#\\~\\-\\.\\+\\!\\*\\'\\(\\)\\,\\_])"
+                    + "|(?:\\%[a-fA-F0-9]{2}))+");
+
     private TextViewUtil() {
         // avoid instantiation - helper class
     }