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diff --git a/indra/newview/llbottomtray.cpp b/indra/newview/llbottomtray.cpp
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+++ b/indra/newview/llbottomtray.cpp
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+/** 
+* @file llbottomtray.cpp
+* @brief LLBottomTray class implementation
+*
+* $LicenseInfo:firstyear=2009&license=viewergpl$
+* 
+* Copyright (c) 2009, Linden Research, Inc.
+* 
+* Second Life Viewer Source Code
+* The source code in this file ("Source Code") is provided by Linden Lab
+* to you under the terms of the GNU General Public License, version 2.0
+* ("GPL"), unless you have obtained a separate licensing agreement
+* ("Other License"), formally executed by you and Linden Lab.  Terms of
+* the GPL can be found in doc/GPL-license.txt in this distribution, or
+* online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
+* 
+* There are special exceptions to the terms and conditions of the GPL as
+* it is applied to this Source Code. View the full text of the exception
+* in the file doc/FLOSS-exception.txt in this software distribution, or
+* online at
+* http://secondlifegrid.net/programs/open_source/licensing/flossexception
+* 
+* By copying, modifying or distributing this software, you acknowledge
+* that you have read and understood your obligations described above,
+* and agree to abide by those obligations.
+* 
+* ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
+* WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
+* COMPLETENESS OR PERFORMANCE.
+* $/LicenseInfo$
+*/
+
+#include "llviewerprecompiledheaders.h" // must be first include
+#include "llbottomtray.h"
+#include "llagent.h"
+#include "llchiclet.h"
+#include "lllayoutstack.h"
+#include "llkeyboard.h"
+#include "llgesturemgr.h"
+#include "llanimationstates.h"
+
+//FIXME: temporary, for send_chat_from_viewer() proto
+#include "llchatbar.h"
+
+LLBottomTray::LLBottomTray()
+	:mLastSpecialChatChannel(0)
+{
+	LLUICtrlFactory::getInstance()->buildPanel(this,"panel_bottomtray.xml");
+
+	mChicletPanel = getChild<LLChicletPanel>("chiclet_list",TRUE,FALSE);
+
+	LLLineEditor* chat_box = getChatBox();
+	chat_box->setCommitCallback(boost::bind(&LLBottomTray::onChatBoxCommit, this));
+	chat_box->setKeystrokeCallback(&onChatBoxKeystroke, this);
+	chat_box->setFocusLostCallback(&onChatBoxFocusLost, this);
+
+	LLIMMgr::getInstance()->addSessionObserver(this);
+}
+
+LLBottomTray::~LLBottomTray()
+{
+	LLIMMgr::getInstance()->removeSessionObserver(this);
+}
+
+LLLineEditor* LLBottomTray::getChatBox()
+{
+	return getChild<LLLineEditor>("chat_box",TRUE,FALSE);
+}
+
+void LLBottomTray::onChatBoxCommit()
+{
+	if (getChatBox()->getText().length() > 0)
+	{
+		sendChat(CHAT_TYPE_NORMAL);
+		
+		LLLineEditor* chat_box = getChatBox();
+
+		if (chat_box)
+		{
+			chat_box->setText(LLStringExplicit(""));			
+		}
+
+		gAgent.stopTyping();
+	}
+}
+
+void LLBottomTray::sendChatFromViewer(const std::string &utf8text, EChatType type, BOOL animate)
+{
+	sendChatFromViewer(utf8str_to_wstring(utf8text), type, animate);
+}
+
+void LLBottomTray::sendChatFromViewer(const LLWString &wtext, EChatType type, BOOL animate)
+{
+	// Look for "/20 foo" channel chats.
+	S32 channel = 0;
+	LLWString out_text = stripChannelNumber(wtext, &channel);
+	std::string utf8_out_text = wstring_to_utf8str(out_text);
+	std::string utf8_text = wstring_to_utf8str(wtext);
+
+	utf8_text = utf8str_trim(utf8_text);
+	if (!utf8_text.empty())
+	{
+		utf8_text = utf8str_truncate(utf8_text, MAX_STRING - 1);
+	}
+
+	// Don't animate for chats people can't hear (chat to scripts)
+	if (animate && (channel == 0))
+	{
+		if (type == CHAT_TYPE_WHISPER)
+		{
+			lldebugs << "You whisper " << utf8_text << llendl;
+			gAgent.sendAnimationRequest(ANIM_AGENT_WHISPER, ANIM_REQUEST_START);
+		}
+		else if (type == CHAT_TYPE_NORMAL)
+		{
+			lldebugs << "You say " << utf8_text << llendl;
+			gAgent.sendAnimationRequest(ANIM_AGENT_TALK, ANIM_REQUEST_START);
+		}
+		else if (type == CHAT_TYPE_SHOUT)
+		{
+			lldebugs << "You shout " << utf8_text << llendl;
+			gAgent.sendAnimationRequest(ANIM_AGENT_SHOUT, ANIM_REQUEST_START);
+		}
+		else
+		{
+			llinfos << "send_chat_from_viewer() - invalid volume" << llendl;
+			return;
+		}
+	}
+	else
+	{
+		if (type != CHAT_TYPE_START && type != CHAT_TYPE_STOP)
+		{
+			lldebugs << "Channel chat: " << utf8_text << llendl;
+		}
+	}
+
+	send_chat_from_viewer(utf8_out_text, type, channel);
+}
+
+// static
+void LLBottomTray::onChatBoxKeystroke(LLLineEditor* caller, void* userdata)
+{
+	LLBottomTray* self = (LLBottomTray *)userdata;
+
+	LLWString raw_text;
+	if (self->getChatBox()) raw_text = self->getChatBox()->getWText();
+
+	// Can't trim the end, because that will cause autocompletion
+	// to eat trailing spaces that might be part of a gesture.
+	LLWStringUtil::trimHead(raw_text);
+
+	S32 length = raw_text.length();
+
+	if( (length > 0) && (raw_text[0] != '/') )  // forward slash is used for escape (eg. emote) sequences
+	{
+		gAgent.startTyping();
+	}
+	else
+	{
+		gAgent.stopTyping();
+	}
+
+	/* Doesn't work -- can't tell the difference between a backspace
+	   that killed the selection vs. backspace at the end of line.
+	if (length > 1 
+		&& text[0] == '/'
+		&& key == KEY_BACKSPACE)
+	{
+		// the selection will already be deleted, but we need to trim
+		// off the character before
+		std::string new_text = raw_text.substr(0, length-1);
+		self->mInputEditor->setText( new_text );
+		self->mInputEditor->setCursorToEnd();
+		length = length - 1;
+	}
+	*/
+
+	KEY key = gKeyboard->currentKey();
+
+	// Ignore "special" keys, like backspace, arrows, etc.
+	if (length > 1 
+		&& raw_text[0] == '/'
+		&& key < KEY_SPECIAL)
+	{
+		// we're starting a gesture, attempt to autocomplete
+
+		std::string utf8_trigger = wstring_to_utf8str(raw_text);
+		std::string utf8_out_str(utf8_trigger);
+
+		if (gGestureManager.matchPrefix(utf8_trigger, &utf8_out_str))
+		{
+			if (self->getChatBox())
+			{
+				std::string rest_of_match = utf8_out_str.substr(utf8_trigger.size());
+				self->getChatBox()->setText(utf8_trigger + rest_of_match); // keep original capitalization for user-entered part
+				S32 outlength = self->getChatBox()->getLength(); // in characters
+			
+				// Select to end of line, starting from the character
+				// after the last one the user typed.
+				self->getChatBox()->setSelection(length, outlength);
+			}
+		}
+
+		//llinfos << "GESTUREDEBUG " << trigger 
+		//	<< " len " << length
+		//	<< " outlen " << out_str.getLength()
+		//	<< llendl;
+	}
+}
+
+// static
+void LLBottomTray::onChatBoxFocusLost(LLFocusableElement* caller, void* userdata)
+{
+	// stop typing animation
+	gAgent.stopTyping();
+}
+
+
+//virtual
+void LLBottomTray::sessionAdded(const LLUUID& session_id, const std::string& name, const LLUUID& other_participant_id)
+{
+	if(getChicletPanel())
+	{
+		LLSD sid(session_id);
+
+		if(getChicletPanel()->findIMChiclet(&sid))
+		{
+
+		}
+		else
+		{
+			LLIMChiclet* chicklet = (LLIMChiclet *)getChicletPanel()->createChiclet(&sid);
+			chicklet->setIMSessionName(name);
+			chicklet->setOtherParticipantId(other_participant_id);
+
+			getChicletPanel()->arrange();
+		}
+	}
+}
+
+//virtual
+void LLBottomTray::sessionRemoved(const LLUUID& session_id)
+{
+	if(getChicletPanel())
+	{
+		LLSD sid(session_id);
+		getChicletPanel()->removeIMChiclet(&sid);
+		getChicletPanel()->arrange();
+	}
+}
+
+void LLBottomTray::sendChat( EChatType type )
+{
+	LLLineEditor* chat_box = getChatBox();
+
+	if (chat_box)
+	{
+		LLWString text = chat_box->getConvertedText();
+		if (!text.empty())
+		{
+			// store sent line in history, duplicates will get filtered
+			chat_box->updateHistory();
+			// Check if this is destined for another channel
+			S32 channel = 0;
+			stripChannelNumber(text, &channel);
+			
+			std::string utf8text = wstring_to_utf8str(text);
+			// Try to trigger a gesture, if not chat to a script.
+			std::string utf8_revised_text;
+			if (0 == channel)
+			{
+				// discard returned "found" boolean
+				gGestureManager.triggerAndReviseString(utf8text, &utf8_revised_text);
+			}
+			else
+			{
+				utf8_revised_text = utf8text;
+			}
+
+			utf8_revised_text = utf8str_trim(utf8_revised_text);
+
+			if (!utf8_revised_text.empty())
+			{
+				// Chat with animation
+				sendChatFromViewer(utf8_revised_text, type, TRUE);
+			}
+		}
+	}
+
+	gAgent.stopTyping();
+}
+
+// If input of the form "/20foo" or "/20 foo", returns "foo" and channel 20.
+// Otherwise returns input and channel 0.
+LLWString LLBottomTray::stripChannelNumber(const LLWString &mesg, S32* channel)
+{
+	if (mesg[0] == '/'
+		&& mesg[1] == '/')
+	{
+		// This is a "repeat channel send"
+		*channel = mLastSpecialChatChannel;
+		return mesg.substr(2, mesg.length() - 2);
+	}
+	else if (mesg[0] == '/'
+			 && mesg[1]
+			 && LLStringOps::isDigit(mesg[1]))
+	{
+		// This a special "/20" speak on a channel
+		S32 pos = 0;
+
+		// Copy the channel number into a string
+		LLWString channel_string;
+		llwchar c;
+		do
+		{
+			c = mesg[pos+1];
+			channel_string.push_back(c);
+			pos++;
+		}
+		while(c && pos < 64 && LLStringOps::isDigit(c));
+		
+		// Move the pointer forward to the first non-whitespace char
+		// Check isspace before looping, so we can handle "/33foo"
+		// as well as "/33 foo"
+		while(c && iswspace(c))
+		{
+			c = mesg[pos+1];
+			pos++;
+		}
+		
+		mLastSpecialChatChannel = strtol(wstring_to_utf8str(channel_string).c_str(), NULL, 10);
+		*channel = mLastSpecialChatChannel;
+		return mesg.substr(pos, mesg.length() - pos);
+	}
+	else
+	{
+		// This is normal chat.
+		*channel = 0;
+		return mesg;
+	}
+}
+