Improved printable string

app/src/main/java/eu/faircode/email/AdapterMedia.java

@@ -232,7 +232,7 @@ public class AdapterMedia extends RecyclerView.Adapter<AdapterMedia.ViewHolder>
                                     BinaryBitmap bBitmap = new BinaryBitmap(new HybridBinarizer(source));
                                     MultiFormatReader reader = new MultiFormatReader();
                                     Result result = reader.decode(bBitmap);
-                                    args.putString("barcode_text", Helper.getPrintableString(result.getText()));
+                                    args.putString("barcode_text", Helper.getPrintableString(result.getText(), false));
                                     args.putString("barcode_format", result.getBarcodeFormat().name());
                                 } catch (NotFoundException ex) {
                                     Log.w(ex);

app/src/main/java/eu/faircode/email/Helper.java

@@ -2177,28 +2177,29 @@ public class Helper {
         return df.format(sign * bytes / Math.pow(unit, exp)) + " " + pre + "B";
     }
 
-    static boolean isPrintableChar(char c) {
-        Character.UnicodeBlock block = Character.UnicodeBlock.of(c);
+    static boolean isPrintableChar(int codepoint) {
+        Character.UnicodeBlock block = Character.UnicodeBlock.of(codepoint);
         if (block == null || block == Character.UnicodeBlock.SPECIALS)
             return false;
-        return !Character.isISOControl(c);
+        return !Character.isISOControl(codepoint);
     }
     // https://issuetracker.google.com/issues/37054851
 
-    static String getPrintableString(String value) {
+    static String getPrintableString(String value, boolean debug) {
         if (TextUtils.isEmpty(value))
             return value;
         StringBuilder result = new StringBuilder();
-        for (int i = 0; i < value.length(); i++) {
-            char kar = value.charAt(i);
-            if (kar == '\n')
+        for (int i = 0; i < value.length(); ) {
+            int codepoint = value.codePointAt(i);
+            if (debug && codepoint == 10)
                 result.append('|');
-            else if (kar == ' ')
+            else if (debug && codepoint == 32)
                 result.append('_');
-            else if (!Helper.isPrintableChar(kar) || kar == '\u00a0')
-                result.append('{').append(Integer.toHexString(kar)).append('}');
+            else if (!Helper.isPrintableChar(codepoint) || codepoint == 160)
+                result.append('{').append(Integer.toHexString(codepoint)).append('}');
             else
-                result.append(kar);
+                result.append(Character.toChars(codepoint));
+            i += Character.charCount(codepoint);
         }
         return result.toString();
     }

app/src/main/java/eu/faircode/email/Log.java

@@ -625,9 +625,9 @@ public class Log {
                         if (element instanceof Long)
                             elements[i] = element + " (0x" + Long.toHexString((Long) element) + ")";
                         else if (element instanceof Spanned)
-                            elements[i] = "(span:" + Helper.getPrintableString(element.toString()) + ")";
+                            elements[i] = "(span:" + Helper.getPrintableString(element.toString(), true) + ")";
                         else
-                            elements[i] = (element == null ? "<null>" : Helper.getPrintableString(element.toString()));
+                            elements[i] = (element == null ? "<null>" : Helper.getPrintableString(element.toString(), true));
                     }
                     value = TextUtils.join(",", elements);
                     if (length > 10)
@@ -636,7 +636,7 @@ public class Log {
                 } else if (v instanceof Long)
                     value = v + " (0x" + Long.toHexString((Long) v) + ")";
                 else if (v instanceof Spanned)
-                    value = "(span:" + Helper.getPrintableString(v.toString()) + ")";
+                    value = "(span:" + Helper.getPrintableString(v.toString(), true) + ")";
                 else if (v instanceof Bundle)
                     value = "{" + TextUtils.join(" ", getExtras((Bundle) v)) + "}";