feature(ComposeActivity): add shortcut for send new toot (CTRL + ENTER) [#505]

app/src/main/java/com/keylesspalace/tusky/ComposeActivity.java

@@ -47,6 +47,7 @@ import android.text.TextWatcher;
 import android.text.style.URLSpan;
 import android.util.DisplayMetrics;
 import android.util.Log;
+import android.view.KeyEvent;
 import android.view.MenuItem;
 import android.view.View;
 import android.view.ViewGroup;
@@ -539,6 +540,8 @@ public final class ComposeActivity
             }
         });
 
+        textEditor.setOnKeyListener((view, keyCode, event) -> this.onKeyShortcut(keyCode, event));
+
         textEditor.setAdapter(
                 new ComposeAutoCompleteAdapter(this));
         textEditor.setTokenizer(new ComposeTokenizer());
@@ -1624,6 +1627,7 @@ public final class ComposeActivity
         return super.onOptionsItemSelected(item);
     }
 
+
     @Override
     public void onBackPressed() {
         // Acting like a teen: deliberately ignoring parent.
@@ -1639,6 +1643,21 @@ public final class ComposeActivity
         handleCloseButton();
     }
 
+
+    @Override
+    public boolean onKeyShortcut(int keyCode, KeyEvent event) {
+        Log.d(TAG, event.toString());
+        if (event.isCtrlPressed()) {
+            if (keyCode == KeyEvent.KEYCODE_ENTER) {
+                // send toot by pressing CTRL + ENTER
+                this.onSendClicked();
+                return true;
+            }
+        }
+
+        return super.onKeyDown(keyCode, event);
+    }
+
     private void handleCloseButton() {
 
         CharSequence contentText = textEditor.getText();