Notify the user that emoji can't be opened in multi-window (close #1101)

Signed-off-by: Daniele Ricci <[email protected]>

app/src/main/java/org/kontalk/ui/AbstractComposeFragment.java

@@ -770,6 +770,16 @@ public void onTextEntryFocus() {
         tryHideAttachmentView(true);
     }
 
+    @Override
+    public boolean canOpenEmoji() {
+        if (SystemUtils.supportsMultiWindow() && getActivity().isInMultiWindowMode()) {
+            Toast.makeText(getContext(), R.string.err_emoji_disabled_in_multiwindow,
+                Toast.LENGTH_LONG).show();
+            return false;
+        }
+        return true;
+    }
+
     /**
      * Sends out the text message in the composing entry.
      */

app/src/main/java/org/kontalk/ui/view/ComposerBar.java

@@ -381,7 +381,8 @@ else if (mDistMove > mMoveOffset) {
         mEmojiButton.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {
-                toggleEmojiDrawer();
+                if (mListener != null && mListener.canOpenEmoji())
+                    toggleEmojiDrawer();
             }
         });
 

app/src/main/java/org/kontalk/ui/view/ComposerListener.java

@@ -56,4 +56,7 @@ void sendBinaryMessage(Uri uri, String mime, boolean media,
     /** The text entry has gained focus. */
     void onTextEntryFocus();
 
+    /** Return false if for whatever reason the emoji panel can't be opened. */
+    boolean canOpenEmoji();
+
 }

app/src/main/java/org/kontalk/util/SystemUtils.java

@@ -489,6 +489,10 @@ public static boolean supportsJobScheduler() {
         return Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP;
     }
 
+    public static boolean supportsMultiWindow() {
+        return Build.VERSION.SDK_INT >= Build.VERSION_CODES.N;
+    }
+
     /** Return true if the platform can and will broadcast network state change *implicit* intents. */
     public static boolean isReceivingNetworkStateChanges() {
         return Build.VERSION.SDK_INT < Build.VERSION_CODES.N;

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

@@ -686,6 +686,8 @@
 
     <string name="err_validation_phone_state_denied">If you allow Kontalk to manage phone calls, it can automatically detect your phone number.\nKontalk won\'t use the granted permission for anything else.</string>
 
+    <string name="err_emoji_disabled_in_multiwindow">Emoji can\'t be used in multi-window mode.</string>
+
     <string name="permission_messages_label">Access to Kontalk messages</string>
     <string name="permission_messages_description">Can read from and write to the Kontalk messages database</string>
     <string name="permission_users_label">Access to Kontalk users information</string>