1 files changed, 66 insertions, 0 deletions
diff --git a/indra/llui/llchatmentionhelper.h b/indra/llui/llchatmentionhelper.h
new file mode 100644
index 0000000000..5f95d06f31
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+++ b/indra/llui/llchatmentionhelper.h
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+/**
+* @file llchatmentionhelper.h
+* @brief Header file for LLChatMentionHelper
+*
+* $LicenseInfo:firstyear=2025&license=viewerlgpl$
+* Second Life Viewer Source Code
+* Copyright (C) 2025, Linden Research, Inc.
+*
+* This library is free software; you can redistribute it and/or
+* modify it under the terms of the GNU Lesser General Public
+* License as published by the Free Software Foundation;
+* version 2.1 of the License only.
+*
+* This library is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+* Lesser General Public License for more details.
+*
+* You should have received a copy of the GNU Lesser General Public
+* License along with this library; if not, write to the Free Software
+* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+*
+* Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+* $/LicenseInfo$
+*/
+
+#pragma once
+
+#include "llhandle.h"
+#include "llsingleton.h"
+
+#include <boost/signals2.hpp>
+
+class LLFloater;
+class LLUICtrl;
+
+class LLChatMentionHelper : public LLSingleton<LLChatMentionHelper>
+{
+    LLSINGLETON(LLChatMentionHelper) {}
+    ~LLChatMentionHelper() override {}
+
+public:
+
+    bool isActive(const LLUICtrl* ctrl) const;
+    bool isCursorInNameMention(const LLWString& wtext, S32 cursor_pos, S32* mention_start_pos = nullptr) const;
+    void showHelper(LLUICtrl* host_ctrl, S32 local_x, S32 local_y, const std::string& av_name, std::function<void(std::string)> commit_cb);
+    void hideHelper(const LLUICtrl* ctrl = nullptr);
+
+    bool handleKey(const LLUICtrl* ctrl, KEY key, MASK mask);
+    void onCommitName(std::string name_url);
+
+    void updateAvatarList(std::vector<std::string> av_names) { mAvatarNames = av_names; }
+
+protected:
+    void setHostCtrl(LLUICtrl* host_ctrl);
+    LLUICtrl* getHostCtrl() const { return mHostHandle.get(); }
+
+private:
+    LLHandle<LLUICtrl>  mHostHandle;
+    LLHandle<LLFloater> mHelperHandle;
+    boost::signals2::connection mHostCtrlFocusLostConn;
+    boost::signals2::connection mHelperCommitConn;
+    std::function<void(std::string)> mNameCommitCb;
+
+    std::vector<std::string> mAvatarNames;
+};