Debug: added text reverse

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

@@ -115,6 +115,7 @@ public class StyleHelper {
             R.id.menu_style_spell_check,
             R.id.menu_style_password,
             R.id.menu_style_code,
+            R.id.menu_style_reverse,
             R.id.menu_style_clear,
             R.id.menu_style_settings
     };
@@ -149,7 +150,7 @@ public class StyleHelper {
                 v.setVisibility(
                         !BuildConfig.PLAY_STORE_RELEASE && Build.VERSION.SDK_INT >= Build.VERSION_CODES.O
                                 ? View.VISIBLE : View.GONE);
-            else if (id == R.id.menu_style_code)
+            else if (id == R.id.menu_style_code || id == R.id.menu_style_reverse)
                 v.setVisibility(BuildConfig.DEBUG ? View.VISIBLE : View.GONE);
         }
 
@@ -465,6 +466,8 @@ public class StyleHelper {
                     setSize(etBody, start, end, HtmlHelper.FONT_SMALL, keep_selection);
                     setFont(etBody, start, end, "monospace", keep_selection);
                     return true;
+                } else if (itemId == R.id.menu_style_reverse) {
+                    return reverse(etBody, start, end);
                 } else if (itemId == R.id.menu_link)
                     return setLink(etBody, start, end, args);
                 else if (itemId == R.id.menu_style_clear)
@@ -1334,6 +1337,17 @@ public class StyleHelper {
         return true;
     }
 
+    static boolean reverse(EditText etBody, int start, int end) {
+        Log.breadcrumb("style", "action", "reverse");
+
+        Editable edit = etBody.getText();
+        List<String> lines = new ArrayList<>(Arrays.asList(edit.subSequence(start, end).toString().split("\n")));
+        Collections.reverse(lines);
+        edit.replace(start, end, TextUtils.join("\n", lines));
+
+        return true;
+    }
+
     static boolean setLink(EditText etBody, int start, int end, Object... args) {
         Log.breadcrumb("style", "action", "link");
 

app/src/main/res/drawable/twotone_expand_24.xml

@@ -0,0 +1,10 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24"
+    android:tint="?attr/colorControlNormal">
+  <path
+      android:fillColor="@android:color/white"
+      android:pathData="M4,20h16v2H4V20zM4,2h16v2H4V2zM13,9h3l-4,-4L8,9h3v6H8l4,4l4,-4h-3V9z"/>
+</vector>

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

@@ -329,6 +329,21 @@
             app:srcCompat="@drawable/twotone_code_24"
             app:tint="@color/action_foreground" />
 
+        <ImageButton
+            android:id="@+id/menu_style_reverse"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:background="?android:attr/selectableItemBackgroundBorderless"
+            android:contentDescription="@string/title_style_reverse"
+            android:paddingHorizontal="12dp"
+            android:paddingVertical="6dp"
+            android:scaleType="fitCenter"
+            android:tooltipText="@string/title_style_reverse"
+            app:layout_constraintStart_toEndOf="@id/menu_style_code"
+            app:layout_constraintTop_toTopOf="parent"
+            app:srcCompat="@drawable/twotone_expand_24"
+            app:tint="@color/action_foreground" />
+
         <ImageButton
             android:id="@+id/menu_style_clear"
             android:layout_width="wrap_content"
@@ -339,7 +354,7 @@
             android:paddingVertical="6dp"
             android:scaleType="fitCenter"
             android:tooltipText="@string/title_style_clear"
-            app:layout_constraintStart_toEndOf="@id/menu_style_code"
+            app:layout_constraintStart_toEndOf="@id/menu_style_reverse"
             app:layout_constraintTop_toTopOf="parent"
             app:srcCompat="@drawable/twotone_format_clear_24"
             app:tint="@color/action_foreground" />

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

@@ -1570,6 +1570,7 @@
     <string name="title_style_superscript">Superscript</string>
     <string name="title_style_strikethrough">Strikethrough</string>
     <string name="title_style_code" translatable="false">Code</string>
+    <string name="title_style_reverse" translatable="false">Reverse</string>
     <string name="title_style_protect">Password protect</string>
     <string name="title_style_protected">Protected content</string>
     <string name="title_style_protect_size">Text too long</string>