Added option to show filter icon when rules were applied

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

@@ -289,6 +289,7 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
     private String sender_ellipsize;
     private String subject_ellipsize;
 
+    private boolean show_filtered;
     private boolean keywords_header;
     private boolean labels_header;
     private boolean flags;
@@ -1460,7 +1461,10 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
             }
 
             ivFound.setVisibility(message.ui_found && found ? View.VISIBLE : View.GONE);
-            ivClassified.setVisibility(message.auto_classified ? View.VISIBLE : View.GONE);
+            ivClassified.setImageResource(message.isFiltered()
+                    ? R.drawable.twotone_filter_alt_24 : R.drawable.twotone_push_pin_24);
+            ivClassified.setVisibility(message.auto_classified || (show_filtered && message.isFiltered())
+                    ? View.VISIBLE : View.GONE);
 
             int snoozy = (message.ui_snoozed != null && message.ui_snoozed == Long.MAX_VALUE
                     ? R.drawable.twotone_visibility_off_24
@@ -7627,6 +7631,7 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
         this.subject_italic = prefs.getBoolean("subject_italic", true);
         this.sender_ellipsize = prefs.getString("sender_ellipsize", "end");
         this.subject_ellipsize = prefs.getString("subject_ellipsize", "full");
+        this.show_filtered = prefs.getBoolean("show_filtered", false);
         this.keywords_header = prefs.getBoolean("keywords_header", false);
         this.labels_header = prefs.getBoolean("labels_header", true);
         this.flags = prefs.getBoolean("flags", true);

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

@@ -361,6 +361,10 @@ public class EntityMessage implements Serializable {
         return hasKeyword(MessageHelper.FLAG_FORWARDED);
     }
 
+    boolean isFiltered() {
+        return hasKeyword(MessageHelper.FLAG_FILTERED);
+    }
+
     boolean isSigned() {
         return (EntityMessage.PGP_SIGNONLY.equals(ui_encrypt) ||
                 EntityMessage.SMIME_SIGNONLY.equals(ui_encrypt));

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

@@ -137,6 +137,7 @@ public class FragmentOptions extends FragmentBase {
             "column_width",
             "hide_toolbar", "nav_categories", "nav_last_sync", "nav_count", "nav_unseen_drafts", "nav_count_pinned", "navbar_colorize",
             "indentation", "date", "date_week", "date_fixed", "date_bold", "threading", "threading_unread",
+            "show_filtered",
             "highlight_unread", "highlight_color", "color_stripe", "color_stripe_wide",
             "avatars", "bimi", "favicons", "generated_icons", "identicons", "circular", "saturation", "brightness", "threshold",
             "authentication", "authentication_indicator",

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

@@ -119,6 +119,7 @@ public class FragmentOptionsMisc extends FragmentBase implements SharedPreferenc
     private SeekBar sbClassMinProbability;
     private TextView tvClassMinDifference;
     private SeekBar sbClassMinDifference;
+    private SwitchCompat swShowFiltered;
     private ImageButton ibClassification;
     private TextView tvFtsIndexed;
     private TextView tvFtsPro;
@@ -270,6 +271,7 @@ public class FragmentOptionsMisc extends FragmentBase implements SharedPreferenc
     private final static String[] RESET_OPTIONS = new String[]{
             "sort_answers", "shortcuts", "fts",
             "classification", "class_min_probability", "class_min_difference",
+            "show_filtered",
             "language",
             "lt_enabled", "lt_auto", "lt_picky", "lt_uri", "lt_user", "lt_key",
             "deepl_enabled",
@@ -359,6 +361,7 @@ public class FragmentOptionsMisc extends FragmentBase implements SharedPreferenc
         sbClassMinProbability = view.findViewById(R.id.sbClassMinProbability);
         tvClassMinDifference = view.findViewById(R.id.tvClassMinDifference);
         sbClassMinDifference = view.findViewById(R.id.sbClassMinDifference);
+        swShowFiltered = view.findViewById(R.id.swShowFiltered);
         tvFtsIndexed = view.findViewById(R.id.tvFtsIndexed);
         tvFtsPro = view.findViewById(R.id.tvFtsPro);
         spLanguage = view.findViewById(R.id.spLanguage);
@@ -647,6 +650,13 @@ public class FragmentOptionsMisc extends FragmentBase implements SharedPreferenc
             }
         });
 
+        swShowFiltered.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
+            @Override
+            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
+                prefs.edit().putBoolean("show_filtered", isChecked).apply();
+            }
+        });
+
         spLanguage.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
             @Override
             public void onItemSelected(AdapterView<?> adapterView, View view, int position, long id) {
@@ -2339,6 +2349,8 @@ public class FragmentOptionsMisc extends FragmentBase implements SharedPreferenc
         tvClassMinDifference.setText(getString(R.string.title_advanced_class_min_difference, NF.format(class_min_difference)));
         sbClassMinDifference.setProgress(class_min_difference);
 
+        swShowFiltered.setChecked(prefs.getBoolean("show_filtered", false));
+
         int selected = -1;
         String language = prefs.getString("language", null);
         List<String> display = new ArrayList<>();

app/src/main/res/layout/fragment_options_misc.xml

@@ -272,6 +272,17 @@
                     app:layout_constraintStart_toStartOf="parent"
                     app:layout_constraintTop_toBottomOf="@id/tvClassMinDifference" />
 
+                <androidx.appcompat.widget.SwitchCompat
+                    android:id="@+id/swShowFiltered"
+                    android:layout_width="0dp"
+                    android:layout_height="wrap_content"
+                    android:layout_marginTop="12dp"
+                    android:text="@string/title_advanced_show_filtered"
+                    app:layout_constraintEnd_toEndOf="parent"
+                    app:layout_constraintStart_toStartOf="parent"
+                    app:layout_constraintTop_toBottomOf="@id/sbClassMinDifference"
+                    app:switchPadding="12dp" />
+
                 <TextView
                     android:id="@+id/tvLanguage"
                     android:layout_width="0dp"
@@ -283,7 +294,7 @@
                     android:textColor="?android:attr/textColorPrimary"
                     app:layout_constraintEnd_toEndOf="parent"
                     app:layout_constraintStart_toStartOf="parent"
-                    app:layout_constraintTop_toBottomOf="@id/sbClassMinDifference" />
+                    app:layout_constraintTop_toBottomOf="@id/swShowFiltered" />
 
                 <Spinner
                     android:id="@+id/spLanguage"

app/src/main/res/values/strings.xml

@@ -793,6 +793,7 @@
     <string name="title_advanced_classification">Classify messages</string>
     <string name="title_advanced_class_min_chance">Minimum class probability: %1$s %%</string>
     <string name="title_advanced_class_min_difference">Minimum class difference: %1$s %%</string>
+    <string name="title_advanced_show_filtered">Show a filter icon when rules were applied</string>
     <string name="title_advanced_language">Language</string>
     <string name="title_advanced_language_system">System</string>
     <string name="title_advanced_lt">LanguageTool integration</string>