Add the option to highlight entries when tapped

This adds an option to highlight tapped entries, so that it's easier to
distinguisch between the one you're trying to enter into a website and the other
ones.

Only one entry can be highlighted at a time. Perhaps it would make sense to
change our tap to reveal functionality to behave the same, so that the two
features are nicely in sync. I can address that in a separate PR if we decide to
do so.

app/src/main/java/com/beemdevelopment/aegis/Preferences.java

@@ -19,7 +19,13 @@ public class Preferences {
         return _prefs.getBoolean("pref_tap_to_reveal", false);
     }
 
-    public boolean isSearchAccountNameEnabled() { return _prefs.getBoolean("pref_search_names", false); }
+    public boolean isSearchAccountNameEnabled() {
+        return _prefs.getBoolean("pref_search_names", false);
+    }
+
+    public boolean isEntryHighlightEnabled() {
+        return _prefs.getBoolean("pref_highlight_entry", false);
+    }
 
     public boolean isSecureScreenEnabled() {
         // screen security should be enabled by default, but not for debug builds

app/src/main/java/com/beemdevelopment/aegis/ui/MainActivity.java

@@ -102,6 +102,7 @@ public class MainActivity extends AegisActivity implements EntryListView.Listene
         _entryListView.setListener(this);
         _entryListView.setShowAccountName(getPreferences().isAccountNameVisible());
         _entryListView.setSearchAccountName(getPreferences().isSearchAccountNameEnabled());
+        _entryListView.setHighlightEntry(getPreferences().isEntryHighlightEnabled());
         _entryListView.setTapToReveal(getPreferences().isTapToRevealEnabled());
         _entryListView.setTapToRevealTime(getPreferences().getTapToRevealTime());
         _entryListView.setSortCategory(getPreferences().getCurrentSortCategory(), false);
@@ -218,11 +219,13 @@ public class MainActivity extends AegisActivity implements EntryListView.Listene
         } else if (data.getBooleanExtra("needsRefresh", false)) {
             boolean showAccountName = getPreferences().isAccountNameVisible();
             boolean searchAccountName = getPreferences().isSearchAccountNameEnabled();
+            boolean highlightEntry = getPreferences().isEntryHighlightEnabled();
             boolean tapToReveal = getPreferences().isTapToRevealEnabled();
             int tapToRevealTime = getPreferences().getTapToRevealTime();
             ViewMode viewMode = getPreferences().getCurrentViewMode();
             _entryListView.setShowAccountName(showAccountName);
             _entryListView.setSearchAccountName(searchAccountName);
+            _entryListView.setHighlightEntry(highlightEntry);
             _entryListView.setTapToReveal(tapToReveal);
             _entryListView.setTapToRevealTime(tapToRevealTime);
             _entryListView.setViewMode(viewMode);

app/src/main/java/com/beemdevelopment/aegis/ui/PreferencesFragment.java

@@ -207,6 +207,12 @@ public class PreferencesFragment extends PreferenceFragmentCompat {
             return true;
         });
 
+        Preference entryHighlightPreference = findPreference("pref_highlight_entry");
+        entryHighlightPreference.setOnPreferenceChangeListener((preference, newValue) -> {
+            _result.putExtra("needsRefresh", true);
+            return true;
+        });
+
         Preference tapToRevealPreference = findPreference("pref_tap_to_reveal");
         tapToRevealPreference.setOnPreferenceChangeListener((preference, newValue) -> {
             _result.putExtra("needsRefresh", true);
@@ -348,7 +354,7 @@ public class PreferencesFragment extends PreferenceFragmentCompat {
     }
 
     @Override
-    public void onActivityCreated (Bundle savedInstanceState) {
+    public void onActivityCreated(Bundle savedInstanceState) {
         super.onActivityCreated(savedInstanceState);
         updateEncryptionPreferences();
     }

app/src/main/java/com/beemdevelopment/aegis/ui/views/EntryAdapter.java

@@ -1,9 +1,12 @@
 package com.beemdevelopment.aegis.ui.views;
 
+import android.os.Handler;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 
+import androidx.recyclerview.widget.RecyclerView;
+
 import com.beemdevelopment.aegis.R;
 import com.beemdevelopment.aegis.SortCategory;
 import com.beemdevelopment.aegis.ViewMode;
@@ -19,15 +22,15 @@ import java.util.Collections;
 import java.util.Comparator;
 import java.util.List;
 
-import androidx.recyclerview.widget.RecyclerView;
-
 public class EntryAdapter extends RecyclerView.Adapter<EntryHolder> implements ItemTouchHelperAdapter {
     private EntryListView _view;
     private List<DatabaseEntry> _entries;
     private List<DatabaseEntry> _shownEntries;
     private DatabaseEntry _selectedEntry;
+    private DatabaseEntry _highlightedEntry;
     private boolean _showAccountName;
     private boolean _searchAccountName;
+    private boolean _highlightEntry;
     private boolean _tapToReveal;
     private int _tapToRevealTime;
     private String _groupFilter;
@@ -35,6 +38,7 @@ public class EntryAdapter extends RecyclerView.Adapter<EntryHolder> implements I
     private ViewMode _viewMode;
     private String _searchFilter;
     private boolean _isPeriodUniform = true;
+    private Handler _dimHandler;
 
     // keeps track of the viewholders that are currently bound
     private List<EntryHolder> _holders;
@@ -43,6 +47,7 @@ public class EntryAdapter extends RecyclerView.Adapter<EntryHolder> implements I
         _entries = new ArrayList<>();
         _shownEntries = new ArrayList<>();
         _holders = new ArrayList<>();
+        _dimHandler = new Handler();
         _view = view;
     }
 
@@ -65,7 +70,13 @@ public class EntryAdapter extends RecyclerView.Adapter<EntryHolder> implements I
         _tapToRevealTime = number;
     }
 
-    public void setSearchAccountName(boolean searchAccountName) { _searchAccountName = searchAccountName; }
+    public void setSearchAccountName(boolean searchAccountName) {
+        _searchAccountName = searchAccountName;
+    }
+
+    public void setHighlightEntry(boolean highlightEntry) {
+        _highlightEntry = highlightEntry;
+    }
 
     public DatabaseEntry getEntryAt(int position) {
         return _shownEntries.get(position);
@@ -293,19 +304,34 @@ public class EntryAdapter extends RecyclerView.Adapter<EntryHolder> implements I
         DatabaseEntry entry = _shownEntries.get(position);
         holder.setFocused(entry == _selectedEntry);
 
+        boolean dimmed = _highlightedEntry != null && _highlightedEntry != entry;
         boolean showProgress = !isPeriodUniform() && entry.getInfo() instanceof TotpInfo;
-        holder.setData(entry, _showAccountName, showProgress, _tapToReveal);
+        holder.setData(entry, _showAccountName, showProgress, _tapToReveal, dimmed);
         holder.setTapToRevealTime(_tapToRevealTime);
         holder.loadIcon(_view);
 
         holder.itemView.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {
-                int position = holder.getAdapterPosition();
-                if (_tapToReveal && holder.isCodeHidden() && _selectedEntry == null) {
-                    holder.revealCode();
-                } else {
-                    _view.onEntryClick(_shownEntries.get(position));
+                boolean handled = false;
+
+                if (_selectedEntry == null) {
+                    if (_tapToReveal && holder.isCodeHidden()) {
+                        holder.revealCode();
+                    }
+
+                    if (_highlightEntry) {
+                        if (_highlightedEntry == entry) {
+                            resetHighlight();
+                            handled = true;
+                        } else {
+                            highlightEntry(entry);
+                        }
+                    }
+                }
+
+                if (!handled) {
+                    _view.onEntryClick(entry);
                 }
             }
         });
@@ -384,9 +410,34 @@ public class EntryAdapter extends RecyclerView.Adapter<EntryHolder> implements I
         return period;
     }
 
+    private void highlightEntry(DatabaseEntry entry) {
+        _highlightedEntry = entry;
+        _dimHandler.removeCallbacksAndMessages(null);
+
+        for (EntryHolder holder : _holders) {
+            if (holder.getEntry() != _highlightedEntry) {
+                holder.dim();
+            } else {
+                holder.highlight();
+            }
+        }
+
+        _dimHandler.postDelayed(this::resetHighlight, _tapToRevealTime * 1000);
+    }
+
+    private void resetHighlight() {
+        _highlightedEntry = null;
+
+        for (EntryHolder holder : _holders) {
+            holder.highlight();
+        }
+    }
+
     public void setSelectedEntry(DatabaseEntry entry) {
         if (entry == null) {
             notifyItemChanged(_shownEntries.indexOf(_selectedEntry));
+        } else if (_highlightEntry) {
+            resetHighlight();
         }
 
         _selectedEntry = entry;

app/src/main/java/com/beemdevelopment/aegis/ui/views/EntryHolder.java

@@ -6,6 +6,9 @@ import android.view.View;
 import android.widget.ImageView;
 import android.widget.TextView;
 
+import androidx.fragment.app.Fragment;
+import androidx.recyclerview.widget.RecyclerView;
+
 import com.amulyakhare.textdrawable.TextDrawable;
 import com.beemdevelopment.aegis.R;
 import com.beemdevelopment.aegis.db.DatabaseEntry;
@@ -19,10 +22,10 @@ import com.beemdevelopment.aegis.otp.TotpInfo;
 import com.bumptech.glide.Glide;
 import com.bumptech.glide.load.engine.DiskCacheStrategy;
 
-import androidx.fragment.app.Fragment;
-import androidx.recyclerview.widget.RecyclerView;
-
 public class EntryHolder extends RecyclerView.ViewHolder {
+    private static final float DEFAULT_ALPHA = 1.0f;
+    private static final float DIMMED_ALPHA = 0.2f;
+
     private TextView _profileName;
     private TextView _profileCode;
     private TextView _profileIssuer;
@@ -74,7 +77,7 @@ public class EntryHolder extends RecyclerView.ViewHolder {
         _hiddenHandler = new Handler();
     }
 
-    public void setData(DatabaseEntry entry, boolean showAccountName, boolean showProgress, boolean hidden) {
+    public void setData(DatabaseEntry entry, boolean showAccountName, boolean showProgress, boolean hidden, boolean dimmed) {
         _entry = entry;
         _hidden = hidden;
 
@@ -98,6 +101,12 @@ public class EntryHolder extends RecyclerView.ViewHolder {
         } else {
             refreshCode();
         }
+
+        itemView.setAlpha(dimmed ? DIMMED_ALPHA : DEFAULT_ALPHA);
+    }
+
+    public DatabaseEntry getEntry() {
+        return _entry;
     }
 
     public void loadIcon(Fragment fragment) {
@@ -191,6 +200,18 @@ public class EntryHolder extends RecyclerView.ViewHolder {
         _hidden = false;
     }
 
+    public void dim() {
+        animateAlphaTo(DIMMED_ALPHA);
+    }
+
+    public void highlight() {
+        animateAlphaTo(DEFAULT_ALPHA);
+    }
+
+    private void animateAlphaTo(float alpha) {
+        itemView.animate().alpha(alpha).setDuration(200).start();
+    }
+
     private void hideCode() {
         _profileCode.setText(R.string.tap_to_reveal);
         _hidden = true;

app/src/main/java/com/beemdevelopment/aegis/ui/views/EntryListView.java

@@ -10,6 +10,15 @@ import android.view.animation.AnimationUtils;
 import android.view.animation.LayoutAnimationController;
 import android.widget.LinearLayout;
 
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.core.content.ContextCompat;
+import androidx.fragment.app.Fragment;
+import androidx.recyclerview.widget.DividerItemDecoration;
+import androidx.recyclerview.widget.ItemTouchHelper;
+import androidx.recyclerview.widget.LinearLayoutManager;
+import androidx.recyclerview.widget.RecyclerView;
+
 import com.beemdevelopment.aegis.R;
 import com.beemdevelopment.aegis.SortCategory;
 import com.beemdevelopment.aegis.ViewMode;
@@ -27,15 +36,6 @@ import com.bumptech.glide.util.ViewPreloadSizeProvider;
 import java.util.Collections;
 import java.util.List;
 
-import androidx.annotation.NonNull;
-import androidx.annotation.Nullable;
-import androidx.core.content.ContextCompat;
-import androidx.fragment.app.Fragment;
-import androidx.recyclerview.widget.DividerItemDecoration;
-import androidx.recyclerview.widget.ItemTouchHelper;
-import androidx.recyclerview.widget.LinearLayoutManager;
-import androidx.recyclerview.widget.RecyclerView;
-
 public class EntryListView extends Fragment implements EntryAdapter.Listener {
     private EntryAdapter _adapter;
     private Listener _listener;
@@ -215,6 +215,10 @@ public class EntryListView extends Fragment implements EntryAdapter.Listener {
         _adapter.setSearchAccountName(searchAccountName);
     }
 
+    public void setHighlightEntry(boolean highlightEntry) {
+        _adapter.setHighlightEntry(highlightEntry);
+    }
+
     public void setTapToReveal(boolean tapToReveal) {
         _adapter.setTapToReveal(tapToReveal);
     }

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

@@ -160,6 +160,8 @@
     <string name="preference_manage_groups_summary">Manage and delete your groups here</string>
     <string name="pref_search_name_title">Search in account names</string>
     <string name="pref_search_name_summary">Include account name matches in the search results</string>
+    <string name="pref_highlight_entry_title">Highlight tokens when tapped</string>
+    <string name="pref_highlight_entry_summary">Make tokens easier to distinguish from each other by temporarily highlighting them when tapped</string>
     <string name="tap_to_reveal">Hidden</string>
     <string name="selected">Selected</string>
     <string name="dark_theme_title">Dark theme</string>

app/src/main/res/xml/preferences.xml

@@ -51,6 +51,12 @@
             android:title="@string/pref_search_name_title"
             android:summary="@string/pref_search_name_summary"
             app:iconSpaceReserved="false"/>
+        <androidx.preference.SwitchPreferenceCompat
+            android:defaultValue="false"
+            android:key="pref_highlight_entry"
+            android:title="@string/pref_highlight_entry_title"
+            android:summary="@string/pref_highlight_entry_summary"
+            app:iconSpaceReserved="false"/>
     </PreferenceCategory>
 
     <PreferenceCategory