Allow pasting signature

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

@@ -219,6 +219,7 @@ public class FragmentCompose extends FragmentBase {
     private TextView tvNoInternet;
     private TextView tvSignature;
     private CheckBox cbSignature;
+    private ImageButton ibSignature;
     private TextView tvReference;
     private ImageButton ibCloseRefHint;
     private ImageButton ibReferenceEdit;
@@ -318,6 +319,7 @@ public class FragmentCompose extends FragmentBase {
         tvNoInternet = view.findViewById(R.id.tvNoInternet);
         tvSignature = view.findViewById(R.id.tvSignature);
         cbSignature = view.findViewById(R.id.cbSignature);
+        ibSignature = view.findViewById(R.id.ibSignature);
         tvReference = view.findViewById(R.id.tvReference);
         ibCloseRefHint = view.findViewById(R.id.ibCloseRefHint);
         ibReferenceEdit = view.findViewById(R.id.ibReferenceEdit);
@@ -567,6 +569,24 @@ public class FragmentCompose extends FragmentBase {
             }
         });
 
+        ibSignature.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                EntityIdentity identity = (EntityIdentity) spIdentity.getSelectedItem();
+                if (identity == null && TextUtils.isEmpty(identity.signature))
+                    return;
+
+                Spanned sig = HtmlHelper.fromHtml(identity.signature, new Html.ImageGetter() {
+                    @Override
+                    public Drawable getDrawable(String source) {
+                        return ImageHelper.decodeImage(getContext(), working, source, true, zoom, etBody);
+                    }
+                }, null);
+
+                etBody.getText().insert(etBody.getSelectionStart(), sig);
+            }
+        });
+
         ibCloseRefHint.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View view) {

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

@@ -318,11 +318,11 @@
                     android:layout_marginTop="6dp"
                     android:layout_marginEnd="6dp"
                     android:fontFamily="monospace"
-                    android:minHeight="24dp"
+                    android:minHeight="72dp"
                     android:text="Signature"
                     android:textAppearance="@style/TextAppearance.AppCompat.Small"
                     android:textIsSelectable="true"
-                    app:layout_constraintEnd_toStartOf="@+id/cbSignature"
+                    app:layout_constraintEnd_toStartOf="@+id/ibSignature"
                     app:layout_constraintStart_toStartOf="parent"
                     app:layout_constraintTop_toBottomOf="@id/vSeparatorBody" />
 
@@ -330,10 +330,21 @@
                     android:id="@+id/cbSignature"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
+                    app:layout_constraintEnd_toEndOf="@id/ibSignature"
+                    app:layout_constraintStart_toStartOf="@id/ibSignature"
+                    app:layout_constraintTop_toTopOf="@+id/tvSignature" />
+
+                <ImageButton
+                    android:id="@+id/ibSignature"
+                    android:layout_width="36dp"
+                    android:layout_height="wrap_content"
                     android:layout_marginEnd="6dp"
+                    android:background="?android:attr/selectableItemBackgroundBorderless"
+                    android:contentDescription="@string/title_legend_show_images"
+                    android:padding="3dp"
                     app:layout_constraintBottom_toBottomOf="@+id/tvSignature"
                     app:layout_constraintEnd_toEndOf="parent"
-                    app:layout_constraintTop_toTopOf="@+id/tvSignature" />
+                    app:srcCompat="@drawable/baseline_assignment_24" />
 
                 <View
                     android:id="@+id/vSeparatorSignature"
@@ -458,7 +469,7 @@
                     android:id="@+id/grpSignature"
                     android:layout_width="0dp"
                     android:layout_height="0dp"
-                    app:constraint_referenced_ids="vSeparatorSignature,tvSignature,cbSignature" />
+                    app:constraint_referenced_ids="vSeparatorSignature,tvSignature,cbSignature,ibSignature" />
 
                 <androidx.constraintlayout.widget.Group
                     android:id="@+id/grpReferenceHint"