Quoting quotes, limited by nesting depth.

src/main/java/eu/siacs/conversations/Config.java

@@ -202,6 +202,8 @@ public final class Config {
         public final static int LOCATION_FIX_SIGNIFICANT_TIME_DELTA = 1000 * 60 * 2; // ms
     }
 
-    // How deep nested quotes should become. '2' means one quote nested in another.
+    // How deep nested quotes should be displayed. '2' means one quote nested in another.
     public static final int QUOTE_MAX_DEPTH = 3;
+    // How deep nested quotes should be created on quoting a message.
+    public static final int QUOTING_MAX_DEPTH = QUOTE_MAX_DEPTH - 1;
 }

src/main/java/eu/siacs/conversations/ui/util/QuoteHelper.java

@@ -1,5 +1,6 @@
 package eu.siacs.conversations.ui.util;
 
+import eu.siacs.conversations.Config;
 import eu.siacs.conversations.utils.UIHelper;
 
 public class QuoteHelper {
@@ -32,20 +33,19 @@ public class QuoteHelper {
         }
         return false;
     }
-    /*public static int getQuoteColors(XmppActivity activity, boolean darkBackground, int quoteDepth){
-        int[] colorsLight = R.style.ConversationsTheme_Dark;
-        int[] colorsDark = Config.QUOTE_COLOR_ARRAY_DARK;
 
-       Collections.rotate(Collections.singletonList(colorsLight), quoteDepth);
-       Collections.rotate(Collections.singletonList(colorsDark), quoteDepth);
-
-       Arrays.stream(colorsLight).toArray();
-
-        int quoteColors =  darkBackground ? ContextCompat.getColor(activity, colorsLight[quoteDepth-1])
-                : ContextCompat.getColor(activity, colorsDark[quoteDepth-1]);
-
-        Collections.rotate
-
-        return quoteColors;
-    };*/
+    public static boolean isNestedTooDeeply (CharSequence line){
+        if (isPositionQuoteCharacter(line, 0)) {
+            int nestingDepth = 1;
+            for (int i = 1; i < line.length(); i++) {
+                if (isPositionQuoteCharacter(line, i)) {
+                    nestingDepth++;
+                }
+                if (nestingDepth > (Config.QUOTING_MAX_DEPTH)) {
+                    return true;
+                }
+            }
+        }
+        return false;
+    }
 }

src/main/java/eu/siacs/conversations/ui/widget/EditMessage.java

@@ -142,7 +142,7 @@ public class EditMessage extends EmojiWrapperEditText {
     }
 
     public void insertAsQuote(String text) {
-        text = text.replaceAll("(\n *){2,}", "\n").replaceAll("(^|\n)", "$1> ").replaceAll("\n$", "");
+        text = text.replaceAll("(\n *){2,}", "\n").replaceAll("(^|\n)>", "$1>>").replaceAll("(^|\n)([^>])", "$1> $2").replaceAll("\n$", "");
         Editable editable = getEditableText();
         int position = getSelectionEnd();
         if (position == -1) position = editable.length();

src/main/java/eu/siacs/conversations/utils/MessageUtils.java

@@ -39,6 +39,7 @@ import eu.siacs.conversations.entities.Conversational;
 import eu.siacs.conversations.entities.Message;
 import eu.siacs.conversations.http.AesGcmURL;
 import eu.siacs.conversations.http.URL;
+import eu.siacs.conversations.ui.util.QuoteHelper;
 
 public class MessageUtils {
 
@@ -69,7 +70,7 @@ public class MessageUtils {
                 continue;
             }
             final char c = line.charAt(0);
-            if (c == '>' && UIHelper.isPositionFollowedByQuoteableCharacter(line, 0)
+            if (QuoteHelper.isNestedTooDeeply(line)
                     || (c == '\u00bb' && !UIHelper.isPositionFollowedByQuote(line, 0))) {
                 continue;
             }