From bbbc30e8234f14c9f340e0c29bb6b91a4bf640ee Mon Sep 17 00:00:00 2001
From: Daniel Gultsch <daniel@gultsch.de>
Date: Sun, 27 Sep 2015 19:17:44 +0200
Subject: allow tab completion in conferences

---
 .../conversations/ui/ConversationFragment.java     | 43 ++++++++++++++++++++++
 1 file changed, 43 insertions(+)

(limited to 'src/main/java/eu/siacs/conversations/ui/ConversationFragment.java')

diff --git a/src/main/java/eu/siacs/conversations/ui/ConversationFragment.java b/src/main/java/eu/siacs/conversations/ui/ConversationFragment.java
index aced2798b..64101539b 100644
--- a/src/main/java/eu/siacs/conversations/ui/ConversationFragment.java
+++ b/src/main/java/eu/siacs/conversations/ui/ConversationFragment.java
@@ -37,6 +37,7 @@ import android.widget.Toast;
 import net.java.otr4j.session.SessionStatus;
 
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.List;
 import java.util.NoSuchElementException;
 import java.util.concurrent.ConcurrentLinkedQueue;
@@ -1226,6 +1227,48 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 		updateSendButton();
 	}
 
+	private int completionIndex = 0;
+	private int lastCompletionLength = 0;
+	private String incomplete;
+	private int lastCompletionCursor;
+	private boolean firstWord = false;
+
+	@Override
+	public boolean onTabPressed(boolean repeated) {
+		if (conversation == null || conversation.getMode() == Conversation.MODE_SINGLE) {
+			return false;
+		}
+		if (repeated) {
+			completionIndex++;
+		} else {
+			lastCompletionLength = 0;
+			completionIndex = 0;
+			final String content = mEditMessage.getText().toString();
+			lastCompletionCursor = mEditMessage.getSelectionEnd();
+			int start = lastCompletionCursor > 0 ? content.lastIndexOf(" ",lastCompletionCursor-1) + 1 : 0;
+			firstWord = start == 0;
+			incomplete = content.substring(start,lastCompletionCursor);
+		}
+		List<String> completions = new ArrayList<>();
+		for(MucOptions.User user : conversation.getMucOptions().getUsers()) {
+			if (user.getName().startsWith(incomplete)) {
+				completions.add(user.getName()+(firstWord ? ": " : " "));
+			}
+		}
+		Collections.sort(completions);
+		if (completions.size() > completionIndex) {
+			String completion = completions.get(completionIndex).substring(incomplete.length());
+			mEditMessage.getEditableText().delete(lastCompletionCursor,lastCompletionCursor + lastCompletionLength);
+			mEditMessage.getEditableText().insert(lastCompletionCursor, completion);
+			lastCompletionLength = completion.length();
+		} else {
+			completionIndex = -1;
+			mEditMessage.getEditableText().delete(lastCompletionCursor,lastCompletionCursor + lastCompletionLength);
+			lastCompletionLength = 0;
+		}
+		return true;
+	}
+
 	@Override
 	public void onActivityResult(int requestCode, int resultCode,
 	                                final Intent data) {
-- 
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