Distraction free reading and composing

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

@@ -26,11 +26,13 @@ import android.content.pm.PackageManager;
 import android.database.Cursor;
 import android.net.Uri;
 import android.os.Bundle;
+import android.os.Handler;
 import android.provider.ContactsContract;
 import android.provider.OpenableColumns;
 import android.text.Html;
 import android.text.TextUtils;
 import android.util.Log;
+import android.view.KeyEvent;
 import android.view.LayoutInflater;
 import android.view.Menu;
 import android.view.MenuInflater;
@@ -94,14 +96,15 @@ public class FragmentCompose extends FragmentEx {
     private EditText etBody;
     private BottomNavigationView bottom_navigation;
     private ProgressBar pbWait;
-    //private Group grpFrom;
+    private Group grpReady;
+    private Group grpHeader;
     private Group grpAddresses;
     private Group grpAttachments;
-    private Group grpReady;
 
     private AdapterAttachment adapter;
 
     private long working = -1;
+    private boolean free = false;
     private boolean autosave = true;
 
     private static final int ATTACHMENT_BUFFER_SIZE = 8192; // bytes
@@ -127,10 +130,10 @@ public class FragmentCompose extends FragmentEx {
         etBody = view.findViewById(R.id.etBody);
         bottom_navigation = view.findViewById(R.id.bottom_navigation);
         pbWait = view.findViewById(R.id.pbWait);
-        //grpFrom = view.findViewById(R.id.grpFrom);
+        grpReady = view.findViewById(R.id.grpReady);
+        grpHeader = view.findViewById(R.id.grpHeader);
         grpAddresses = view.findViewById(R.id.grpAddresses);
         grpAttachments = view.findViewById(R.id.grpAttachments);
-        grpReady = view.findViewById(R.id.grpReady);
 
         // Wire controls
 
@@ -173,6 +176,48 @@ public class FragmentCompose extends FragmentEx {
             }
         });
 
+        etBody.setOnFocusChangeListener(new View.OnFocusChangeListener() {
+            @Override
+            public void onFocusChange(View view, boolean hasFocus) {
+                free = hasFocus;
+                getActivity().invalidateOptionsMenu();
+                grpHeader.setVisibility(hasFocus ? View.GONE : View.VISIBLE);
+                if (hasFocus) {
+                    grpAddresses.setVisibility(View.GONE);
+                    grpAttachments.setVisibility(View.GONE);
+                }
+            }
+        });
+
+        etBody.setOnKeyListener(new View.OnKeyListener() {
+            @Override
+            public boolean onKey(View view, int keyCode, KeyEvent event) {
+                if (event.getAction() == KeyEvent.ACTION_DOWN) {
+                    switch (keyCode) {
+                        case KeyEvent.KEYCODE_BACK:
+                            if (grpHeader.getVisibility() == View.GONE) {
+                                free = false;
+                                getActivity().invalidateOptionsMenu();
+                                grpHeader.setVisibility(View.VISIBLE);
+
+                                if (rvAttachment.getAdapter().getItemCount() > 0)
+                                    grpAttachments.setVisibility(View.VISIBLE);
+
+                                new Handler().post(new Runnable() {
+                                    @Override
+                                    public void run() {
+                                        etSubject.requestFocus();
+                                    }
+                                });
+
+                                return true;
+                            }
+                    }
+                }
+                return false;
+            }
+        });
+
         bottom_navigation.setOnNavigationItemSelectedListener(new BottomNavigationView.OnNavigationItemSelectedListener() {
             @Override
             public boolean onNavigationItemSelected(@NonNull MenuItem item) {
@@ -304,7 +349,7 @@ public class FragmentCompose extends FragmentEx {
         super.onPrepareOptionsMenu(menu);
         menu.findItem(R.id.menu_attachment).setVisible(working >= 0);
         menu.findItem(R.id.menu_attachment).setEnabled(etBody.isEnabled());
-        menu.findItem(R.id.menu_addresses).setVisible(working >= 0);
+        menu.findItem(R.id.menu_addresses).setVisible(!free && working >= 0);
     }
 
     @Override
@@ -723,7 +768,8 @@ public class FragmentCompose extends FragmentEx {
                                 attachments = new ArrayList<>();
 
                             adapter.set(attachments);
-                            grpAttachments.setVisibility(attachments.size() > 0 ? View.VISIBLE : View.GONE);
+                            if (!free)
+                                grpAttachments.setVisibility(attachments.size() > 0 ? View.VISIBLE : View.GONE);
                         }
                     });
 

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

@@ -43,6 +43,7 @@ import android.widget.TextView;
 import android.widget.Toast;
 
 import com.google.android.material.bottomnavigation.BottomNavigationView;
+import com.google.android.material.floatingactionbutton.FloatingActionButton;
 
 import java.text.Collator;
 import java.text.DateFormat;
@@ -80,12 +81,15 @@ public class FragmentMessage extends FragmentEx {
     private TextView tvError;
     private BottomNavigationView top_navigation;
     private TextView tvBody;
+    private FloatingActionButton fab;
     private BottomNavigationView bottom_navigation;
     private ProgressBar pbWait;
+    private Group grpReady;
+    private Group grpHeader;
     private Group grpAddresses;
     private Group grpAttachments;
-    private Group grpReady;
 
+    private boolean free = false;
     private AdapterAttachment adapter;
 
     private boolean debug;
@@ -114,11 +118,13 @@ public class FragmentMessage extends FragmentEx {
         tvError = view.findViewById(R.id.tvError);
         top_navigation = view.findViewById(R.id.top_navigation);
         tvBody = view.findViewById(R.id.tvBody);
+        fab = view.findViewById(R.id.fab);
         bottom_navigation = view.findViewById(R.id.bottom_navigation);
         pbWait = view.findViewById(R.id.pbWait);
+        grpReady = view.findViewById(R.id.grpReady);
+        grpHeader = view.findViewById(R.id.grpHeader);
         grpAddresses = view.findViewById(R.id.grpAddresses);
         grpAttachments = view.findViewById(R.id.grpAttachments);
-        grpReady = view.findViewById(R.id.grpReady);
 
         setHasOptionsMenu(true);
 
@@ -193,6 +199,24 @@ public class FragmentMessage extends FragmentEx {
             }
         });
 
+        fab.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                free = (top_navigation.getVisibility() != View.GONE);
+                getActivity().invalidateOptionsMenu();
+                grpHeader.setVisibility(free ? View.GONE : View.VISIBLE);
+                if (free) {
+                    fab.setImageResource(R.drawable.baseline_fullscreen_exit_24);
+                    grpAddresses.setVisibility(View.GONE);
+                    grpAttachments.setVisibility(View.GONE);
+                } else {
+                    fab.setImageResource(R.drawable.baseline_fullscreen_24);
+                    if (rvAttachment.getAdapter().getItemCount() > 0)
+                        grpAttachments.setVisibility(View.VISIBLE);
+                }
+            }
+        });
+
         bottom_navigation.setOnNavigationItemSelectedListener(new BottomNavigationView.OnNavigationItemSelectedListener() {
             @Override
             public boolean onNavigationItemSelected(@NonNull MenuItem item) {
@@ -357,7 +381,8 @@ public class FragmentMessage extends FragmentEx {
                             attachments = new ArrayList<>();
 
                         adapter.set(attachments);
-                        grpAttachments.setVisibility(attachments.size() > 0 ? View.VISIBLE : View.GONE);
+                        if (!free)
+                            grpAttachments.setVisibility(attachments.size() > 0 ? View.VISIBLE : View.GONE);
                     }
                 });
 
@@ -369,6 +394,12 @@ public class FragmentMessage extends FragmentEx {
         super.onCreateOptionsMenu(menu, inflater);
     }
 
+    @Override
+    public void onPrepareOptionsMenu(Menu menu) {
+        super.onPrepareOptionsMenu(menu);
+        menu.findItem(R.id.menu_addresses).setVisible(!free);
+    }
+
     @Override
     public boolean onOptionsItemSelected(MenuItem item) {
         switch (item.getItemId()) {

app/src/main/res/drawable/baseline_fullscreen_24.xml

@@ -0,0 +1,10 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="24dp"
+        android:height="24dp"
+        android:viewportWidth="24.0"
+        android:viewportHeight="24.0"
+        android:tint="?attr/colorControlNormal">
+    <path
+        android:fillColor="@android:color/white"
+        android:pathData="M7,14L5,14v5h5v-2L7,17v-3zM5,10h2L7,7h3L10,5L5,5v5zM17,17h-3v2h5v-5h-2v3zM14,5v2h3v3h2L19,5h-5z"/>
+</vector>

app/src/main/res/drawable/baseline_fullscreen_exit_24.xml

@@ -0,0 +1,10 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="24dp"
+        android:height="24dp"
+        android:viewportWidth="24.0"
+        android:viewportHeight="24.0"
+        android:tint="?attr/colorControlNormal">
+    <path
+        android:fillColor="@android:color/white"
+        android:pathData="M5,16h3v3h2v-5L5,14v2zM8,8L5,8v2h5L10,5L8,5v3zM14,19h2v-3h3v-2h-5v5zM16,8L16,5h-2v5h5L19,8h-3z"/>
+</vector>

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

@@ -195,26 +195,26 @@
         app:layout_constraintTop_toTopOf="parent" />
 
     <androidx.constraintlayout.widget.Group
-        android:id="@+id/grpFrom"
+        android:id="@+id/grpReady"
         android:layout_width="0dp"
         android:layout_height="0dp"
-        app:constraint_referenced_ids="spFrom,ivIdentityAdd" />
+        app:constraint_referenced_ids="etTo,ivToAdd,etSubject,vSeparator,scroll,bottom_navigation" />
 
     <androidx.constraintlayout.widget.Group
-        android:id="@+id/grpAddresses"
+        android:id="@+id/grpHeader"
         android:layout_width="0dp"
         android:layout_height="0dp"
-        app:constraint_referenced_ids="etCc,ivCcAdd,etBcc,ivBccAdd" />
+        app:constraint_referenced_ids="spFrom,ivIdentityAdd,etTo,ivToAdd,etSubject,vSeparator" />
 
     <androidx.constraintlayout.widget.Group
-        android:id="@+id/grpAttachments"
+        android:id="@+id/grpAddresses"
         android:layout_width="0dp"
         android:layout_height="0dp"
-        app:constraint_referenced_ids="vSeparatorAttachments,rvAttachment" />
+        app:constraint_referenced_ids="etCc,ivCcAdd,etBcc,ivBccAdd" />
 
     <androidx.constraintlayout.widget.Group
-        android:id="@+id/grpReady"
+        android:id="@+id/grpAttachments"
         android:layout_width="0dp"
         android:layout_height="0dp"
-        app:constraint_referenced_ids="etTo,ivToAdd,etSubject,vSeparator,scroll,bottom_navigation" />
+        app:constraint_referenced_ids="vSeparatorAttachments,rvAttachment" />
 </androidx.constraintlayout.widget.ConstraintLayout>

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

@@ -233,6 +233,18 @@
             android:textIsSelectable="true" />
     </ScrollView>
 
+    <com.google.android.material.floatingactionbutton.FloatingActionButton
+        android:id="@+id/fab"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="end|bottom"
+        android:layout_margin="16dp"
+        android:src="@drawable/baseline_fullscreen_24"
+        android:tint="@color/colorActionForeground"
+        app:backgroundTint="?attr/colorAccent"
+        app:layout_constraintBottom_toBottomOf="@+id/scroll"
+        app:layout_constraintEnd_toEndOf="parent" />
+
     <com.google.android.material.bottomnavigation.BottomNavigationView
         android:id="@+id/bottom_navigation"
         android:layout_width="match_parent"
@@ -259,20 +271,26 @@
         app:layout_constraintTop_toTopOf="parent" />
 
     <androidx.constraintlayout.widget.Group
-        android:id="@+id/grpAddresses"
+        android:id="@+id/grpReady"
         android:layout_width="0dp"
         android:layout_height="0dp"
-        app:constraint_referenced_ids="vSeparatorAddress,tvReplyToTitle,tvReplyTo,tvCcTitle,tvCc,tvBccTitle,tvBcc" />
+        app:constraint_referenced_ids="tvFrom,tvToTitle,tvTo,tvTime,tvSubject,tvCount,scroll,fab" />
 
     <androidx.constraintlayout.widget.Group
-        android:id="@+id/grpAttachments"
+        android:id="@+id/grpHeader"
         android:layout_width="0dp"
         android:layout_height="0dp"
-        app:constraint_referenced_ids="vSeparatorAttachments,rvAttachment" />
+        app:constraint_referenced_ids="tvFrom,tvToTitle,tvTo,tvTime,tvSubject,tvCount,top_navigation" />
 
     <androidx.constraintlayout.widget.Group
-        android:id="@+id/grpReady"
+        android:id="@+id/grpAddresses"
+        android:layout_width="0dp"
+        android:layout_height="0dp"
+        app:constraint_referenced_ids="vSeparatorAddress,tvReplyToTitle,tvReplyTo,tvCcTitle,tvCc,tvBccTitle,tvBcc" />
+
+    <androidx.constraintlayout.widget.Group
+        android:id="@+id/grpAttachments"
         android:layout_width="0dp"
         android:layout_height="0dp"
-        app:constraint_referenced_ids="tvFrom,tvToTitle,tvTo,tvTime,tvSubject,tvCount,scroll" />
+        app:constraint_referenced_ids="vSeparatorAttachments,rvAttachment" />
 </androidx.constraintlayout.widget.ConstraintLayout>