Fix merge conflicts after auto merge

13 files changed, 687 insertions, 19 deletions

diff --git a/indra/llui/CMakeLists.txt b/indra/llui/CMakeLists.txt
index e0579352d3..44c61dcdbc 100644
--- a/indra/llui/CMakeLists.txt
+++ b/indra/llui/CMakeLists.txt
@@ -53,6 +53,8 @@ set(llui_SOURCE_FILES
     lldockcontrol.cpp
     lldraghandle.cpp
     lleditmenuhandler.cpp
+	llemojidictionary.cpp
+	llemojihelper.cpp
     llf32uictrl.cpp
     llfiltereditor.cpp
     llflashtimer.cpp
@@ -163,6 +165,8 @@ set(llui_HEADER_FILES
     lldockablefloater.h
     lldockcontrol.h
     lleditmenuhandler.h
+	llemojidictionary.h
+	llemojihelper.h
     llf32uictrl.h
     llfiltereditor.h 
     llflashtimer.h
diff --git a/indra/llui/llemojidictionary.cpp b/indra/llui/llemojidictionary.cpp
new file mode 100644
index 0000000000..b70a9b2e7a
--- /dev/null
+++ b/indra/llui/llemojidictionary.cpp
@@ -0,0 +1,200 @@
+/**
+* @file llemojidictionary.cpp
+* @brief Implementation of LLEmojiDictionary
+*
+* $LicenseInfo:firstyear=2014&license=viewerlgpl$
+* Second Life Viewer Source Code
+* Copyright (C) 2014, 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
+* $/LicenseInfo$
+*/
+
+#include "linden_common.h"
+
+#include "lldir.h"
+#include "llemojidictionary.h"
+#include "llsdserialize.h"
+
+#include <boost/algorithm/string.hpp>
+#include <boost/range/adaptor/filtered.hpp>
+#include <boost/range/algorithm/transform.hpp>
+
+// ============================================================================
+// Constants
+//
+
+constexpr char SKINNED_EMOJI_FILENAME[] = "emoji_characters.xml";
+
+// ============================================================================
+// Helper functions
+//
+
+template<class T>
+std::list<T> llsd_array_to_list(const LLSD& sd, std::function<void(T&)> mutator = {});
+
+template<>
+std::list<std::string> llsd_array_to_list(const LLSD& sd, std::function<void(std::string&)> mutator)
+{
+	std::list<std::string> result;
+	for (LLSD::array_const_iterator it = sd.beginArray(), end = sd.endArray(); it != end; ++it)
+	{
+		const LLSD& entry = *it;
+		if (!entry.isString())
+			continue;
+
+		result.push_back(entry.asStringRef());
+		if (mutator)
+		{
+			mutator(result.back());
+		}
+	}
+	return result;
+}
+
+LLEmojiDescriptor::LLEmojiDescriptor(const LLSD& descriptor_sd)
+{
+	Name = descriptor_sd["Name"].asStringRef();
+
+	const LLWString emoji_string = utf8str_to_wstring(descriptor_sd["Character"].asString());
+	Character = (1 == emoji_string.size()) ? emoji_string[0] : L'\0'; // We don't currently support character composition
+
+	auto toLower = [](std::string& str) { LLStringUtil::toLower(str); };
+	ShortCodes = llsd_array_to_list<std::string>(descriptor_sd["ShortCodes"], toLower);
+	Categories = llsd_array_to_list<std::string>(descriptor_sd["Categories"], toLower);
+
+	if (Name.empty())
+	{
+		Name = ShortCodes.front();
+	}
+}
+
+bool LLEmojiDescriptor::isValid() const
+{
+	return
+		Character &&
+		!ShortCodes.empty() &&
+		!Categories.empty();
+}
+
+struct emoji_filter_base
+{
+	emoji_filter_base(const std::string& needle)
+	{
+		// Search without the colon (if present) so the user can type ':food' and see all emojis in the 'Food' category
+		mNeedle = (boost::starts_with(needle, ":")) ? needle.substr(1) : needle;
+		LLStringUtil::toLower(mNeedle);
+	}
+
+protected:
+	std::string mNeedle;
+};
+
+struct emoji_filter_shortcode_or_category_contains : public emoji_filter_base
+{
+	emoji_filter_shortcode_or_category_contains(const std::string& needle) : emoji_filter_base(needle) {}
+
+	bool operator()(const LLEmojiDescriptor& descr) const
+	{
+		for (const auto& short_code : descr.ShortCodes)
+		{
+			if (boost::icontains(short_code, mNeedle))
+				return true;
+		}
+
+		for (const auto& category : descr.Categories)
+		{
+			if (boost::icontains(category, mNeedle))
+				return true;
+		}
+
+		return false;
+	}
+};
+
+// ============================================================================
+// LLEmojiDictionary class
+//
+
+LLEmojiDictionary::LLEmojiDictionary()
+{
+}
+
+// static
+void LLEmojiDictionary::initClass()
+{
+	LLEmojiDictionary* pThis = &LLEmojiDictionary::initParamSingleton();
+
+	LLSD data;
+
+	const std::string filename = gDirUtilp->findSkinnedFilenames(LLDir::XUI, SKINNED_EMOJI_FILENAME, LLDir::CURRENT_SKIN).front();
+	llifstream file(filename.c_str());
+	if (file.is_open())
+	{
+		LL_DEBUGS() << "Loading emoji characters file at " << filename << LL_ENDL;
+		LLSDSerialize::fromXML(data, file);
+	}
+
+	if (data.isUndefined())
+	{
+		LL_WARNS() << "Emoji file characters missing or ill-formed" << LL_ENDL;
+		return;
+	}
+
+	for (LLSD::array_const_iterator descriptor_it = data.beginArray(), descriptor_end = data.endArray(); descriptor_it != descriptor_end; ++descriptor_it)
+	{
+		LLEmojiDescriptor descriptor(*descriptor_it);
+		if (!descriptor.isValid())
+		{
+			LL_WARNS() << "Skipping invalid emoji descriptor " << descriptor.Character << LL_ENDL;
+			continue;
+		}
+		pThis->addEmoji(std::move(descriptor));
+	}
+}
+
+LLWString LLEmojiDictionary::findMatchingEmojis(const std::string& needle) const
+{
+	LLWString result;
+	boost::transform(mEmojis | boost::adaptors::filtered(emoji_filter_shortcode_or_category_contains(needle)),
+		             std::back_inserter(result), [](const auto& descr) { return descr.Character; });
+	return result;
+}
+
+const LLEmojiDescriptor* LLEmojiDictionary::getDescriptorFromShortCode(const std::string& short_code) const
+{
+	const auto it = mShortCode2Descr.find(short_code);
+	return (mShortCode2Descr.end() != it) ? it->second : nullptr;
+}
+
+std::string LLEmojiDictionary::getNameFromEmoji(llwchar ch) const
+{
+	const auto it = mEmoji2Descr.find(ch);
+	return (mEmoji2Descr.end() != it) ? it->second->Name : LLStringUtil::null;
+}
+
+void LLEmojiDictionary::addEmoji(LLEmojiDescriptor&& descr)
+{
+	mEmojis.push_back(descr);
+	mEmoji2Descr.insert(std::make_pair(descr.Character, &mEmojis.back()));
+	for (const std::string& shortCode : descr.ShortCodes)
+	{
+		mShortCode2Descr.insert(std::make_pair(shortCode, &mEmojis.back()));
+	}
+}
+
+// ============================================================================
diff --git a/indra/llui/llemojidictionary.h b/indra/llui/llemojidictionary.h
new file mode 100644
index 0000000000..46a61f1cd7
--- /dev/null
+++ b/indra/llui/llemojidictionary.h
@@ -0,0 +1,73 @@
+/**
+* @file llemojidictionary.h
+* @brief Header file for LLEmojiDictionary
+*
+* $LicenseInfo:firstyear=2014&license=viewerlgpl$
+* Second Life Viewer Source Code
+* Copyright (C) 2014, 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 "lldictionary.h"
+#include "llinitdestroyclass.h"
+#include "llsingleton.h"
+
+// ============================================================================
+// LLEmojiDescriptor class
+//
+
+struct LLEmojiDescriptor
+{
+	LLEmojiDescriptor(const LLSD& descriptor_sd);
+
+	bool isValid() const;
+
+	std::string            Name;
+	llwchar                Character;
+	std::list<std::string> ShortCodes;
+	std::list<std::string> Categories;
+};
+
+// ============================================================================
+// LLEmojiDictionary class
+//
+
+class LLEmojiDictionary : public LLParamSingleton<LLEmojiDictionary>, public LLInitClass<LLEmojiDictionary>
+{
+	LLSINGLETON(LLEmojiDictionary);
+	~LLEmojiDictionary() override {};
+
+public:
+	static void initClass();
+	LLWString   findMatchingEmojis(const std::string& needle) const;
+	const LLEmojiDescriptor* getDescriptorFromShortCode(const std::string& short_code) const;
+	std::string getNameFromEmoji(llwchar ch) const;
+
+private:
+	void addEmoji(LLEmojiDescriptor&& descr);
+
+private:
+	std::list<LLEmojiDescriptor> mEmojis;
+	std::map<llwchar, const LLEmojiDescriptor*> mEmoji2Descr;
+	std::map<std::string, const LLEmojiDescriptor*> mShortCode2Descr;
+};
+
+// ============================================================================
diff --git a/indra/llui/llemojihelper.cpp b/indra/llui/llemojihelper.cpp
new file mode 100644
index 0000000000..1e4c19a183
--- /dev/null
+++ b/indra/llui/llemojihelper.cpp
@@ -0,0 +1,166 @@
+/**
+* @file llemojihelper.h
+* @brief Header file for LLEmojiHelper
+*
+* $LicenseInfo:firstyear=2014&license=viewerlgpl$
+* Second Life Viewer Source Code
+* Copyright (C) 2014, 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
+* $/LicenseInfo$
+*/
+
+#include "linden_common.h"
+
+#include "llemojidictionary.h"
+#include "llemojihelper.h"
+#include "llfloater.h"
+#include "llfloaterreg.h"
+#include "lluictrl.h"
+
+// ============================================================================
+// Constants
+//
+
+constexpr char DEFAULT_EMOJI_HELPER_FLOATER[] = "emoji_complete";
+constexpr S32 HELPER_FLOATER_OFFSET_X = 20;
+constexpr S32 HELPER_FLOATER_OFFSET_Y = 0;
+
+// ============================================================================
+// LLEmojiHelper
+//
+
+std::string LLEmojiHelper::getToolTip(llwchar ch) const
+{
+	return LLEmojiDictionary::instance().getNameFromEmoji(ch);
+}
+
+bool LLEmojiHelper::isActive(const LLUICtrl* ctrl_p) const
+{
+	return mHostHandle.get() == ctrl_p;
+}
+
+// static
+bool LLEmojiHelper::isCursorInEmojiCode(const LLWString& wtext, S32 cursorPos, S32* pShortCodePos)
+{
+	// If the cursor is currently on a colon start the check one character further back
+	S32 shortCodePos = (cursorPos == 0 || L':' != wtext[cursorPos - 1]) ? cursorPos : cursorPos - 1;
+
+	auto isPartOfShortcode = [](llwchar ch) {
+		switch (ch)
+		{
+			case L'-':
+			case L'_':
+			case L'+':
+				return true;
+			default:
+				return LLStringOps::isAlnum(ch);
+		}
+	};
+	while (shortCodePos > 1 && isPartOfShortcode(wtext[shortCodePos - 1]))
+	{
+		shortCodePos--;
+	}
+
+	bool isShortCode = (L':' == wtext[shortCodePos - 1]) && (cursorPos - shortCodePos >= 2);
+	if (pShortCodePos)
+		*pShortCodePos = (isShortCode) ? shortCodePos - 1 : -1;
+	return isShortCode;
+}
+
+void LLEmojiHelper::showHelper(LLUICtrl* hostctrl_p, S32 local_x, S32 local_y, const std::string& short_code, std::function<void(LLWString)> cb)
+{
+	// Commit immediately if the user already typed a full shortcode
+	if (const auto* emojiDescrp = LLEmojiDictionary::instance().getDescriptorFromShortCode(short_code))
+	{
+		cb(LLWString(1, emojiDescrp->Character));
+		hideHelper();
+		return;
+	}
+
+	if (mHelperHandle.isDead())
+	{
+		LLFloater* pHelperFloater = LLFloaterReg::getInstance(DEFAULT_EMOJI_HELPER_FLOATER);
+		mHelperHandle = pHelperFloater->getHandle();
+		mHelperCommitConn = pHelperFloater->setCommitCallback(std::bind([&](const LLSD& sdValue) { onCommitEmoji(utf8str_to_wstring(sdValue.asStringRef())); }, std::placeholders::_2));
+	}
+	setHostCtrl(hostctrl_p);
+	mEmojiCommitCb = cb;
+
+	S32 floater_x, floater_y;
+	if (!hostctrl_p->localPointToOtherView(local_x, local_y, &floater_x, &floater_y, gFloaterView))
+	{
+		LL_ERRS() << "Cannot show emoji helper for non-floater controls." << LL_ENDL;
+		return;
+	}
+
+	LLFloater* pHelperFloater = mHelperHandle.get();
+	LLRect rct = pHelperFloater->getRect();
+	rct.setLeftTopAndSize(floater_x - HELPER_FLOATER_OFFSET_X, floater_y - HELPER_FLOATER_OFFSET_Y + rct.getHeight(), rct.getWidth(), rct.getHeight());
+	pHelperFloater->setRect(rct);
+	pHelperFloater->openFloater(LLSD().with("hint", short_code));
+}
+
+void LLEmojiHelper::hideHelper(const LLUICtrl* ctrl_p)
+{
+	if (ctrl_p && !isActive(ctrl_p))
+	{
+		return;
+	}
+
+	setHostCtrl(nullptr);
+}
+
+bool LLEmojiHelper::handleKey(const LLUICtrl* ctrl_p, KEY key, MASK mask)
+{
+	if (mHelperHandle.isDead() || !isActive(ctrl_p))
+	{
+		return false;
+	}
+
+	return mHelperHandle.get()->handleKey(key, mask, true);
+}
+
+void LLEmojiHelper::onCommitEmoji(const LLWString& wstr)
+{
+	if (!mHostHandle.isDead() && mEmojiCommitCb)
+	{
+		mEmojiCommitCb(wstr);
+	}
+}
+
+void LLEmojiHelper::setHostCtrl(LLUICtrl* hostctrl_p)
+{
+	const LLUICtrl* pCurHostCtrl = mHostHandle.get();
+	if (pCurHostCtrl != hostctrl_p)
+	{
+		mHostCtrlFocusLostConn.disconnect();
+		mHostHandle.markDead();
+		mEmojiCommitCb = {};
+
+		if (!mHelperHandle.isDead())
+		{
+			mHelperHandle.get()->closeFloater();
+		}
+
+		if (hostctrl_p)
+		{
+			mHostHandle = hostctrl_p->getHandle();
+			mHostCtrlFocusLostConn = hostctrl_p->setFocusLostCallback(std::bind([&]() { hideHelper(getHostCtrl()); }));
+		}
+	}
+}
diff --git a/indra/llui/llemojihelper.h b/indra/llui/llemojihelper.h
new file mode 100644
index 0000000000..63f5c640c9
--- /dev/null
+++ b/indra/llui/llemojihelper.h
@@ -0,0 +1,64 @@
+/**
+* @file llemojihelper.h
+* @brief Header file for LLEmojiHelper
+*
+* $LicenseInfo:firstyear=2014&license=viewerlgpl$
+* Second Life Viewer Source Code
+* Copyright (C) 2014, 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 LLEmojiHelper : public LLSingleton<LLEmojiHelper>
+{
+	LLSINGLETON(LLEmojiHelper) {}
+	~LLEmojiHelper() override {}
+
+public:
+	// General
+	std::string getToolTip(llwchar ch) const;
+	bool        isActive(const LLUICtrl* ctrl_p) const;
+	static bool isCursorInEmojiCode(const LLWString& wtext, S32 cursor_pos, S32* short_code_pos_p = nullptr);
+	void        showHelper(LLUICtrl* hostctrl_p, S32 local_x, S32 local_y, const std::string& short_code, std::function<void(LLWString)> commit_cb);
+	void        hideHelper(const LLUICtrl* ctrl_p = nullptr);
+
+	// Eventing
+	bool handleKey(const LLUICtrl* ctrl_p, KEY key, MASK mask);
+	void onCommitEmoji(const LLWString& wstr);
+
+protected:
+	LLUICtrl* getHostCtrl() const { return mHostHandle.get(); }
+	void      setHostCtrl(LLUICtrl* hostctrl_p);
+
+private:
+	LLHandle<LLUICtrl>  mHostHandle;
+	LLHandle<LLFloater> mHelperHandle;
+	boost::signals2::connection mHostCtrlFocusLostConn;
+	boost::signals2::connection mHelperCommitConn;
+	std::function<void(LLWString)> mEmojiCommitCb;
+};
diff --git a/indra/llui/llfloater.cpp b/indra/llui/llfloater.cpp
index d413fab270..763b67bb3a 100644
--- a/indra/llui/llfloater.cpp
+++ b/indra/llui/llfloater.cpp
@@ -2486,7 +2486,7 @@ void LLFloaterView::bringToFront(LLFloater* child, BOOL give_focus, BOOL restore
 
 	if (mFrontChild == child)
 	{
-		if (give_focus && !gFocusMgr.childHasKeyboardFocus(child))
+		if (give_focus && child->canFocusStealFrontmost() && !gFocusMgr.childHasKeyboardFocus(child))
 		{
 			child->setFocus(TRUE);
 		}
@@ -3039,7 +3039,34 @@ void LLFloaterView::syncFloaterTabOrder()
 			LLFloater* floaterp = dynamic_cast<LLFloater*>(*child_it);
 			if (gFocusMgr.childHasKeyboardFocus(floaterp))
 			{
-				bringToFront(floaterp, FALSE);
+                if (mFrontChild != floaterp)
+                {
+                    // Grab a list of the top floaters that want to stay on top of the focused floater
+					std::list<LLFloater*> listTop;
+					if (mFrontChild && !mFrontChild->canFocusStealFrontmost())
+                    {
+                        for (LLView* childp : *getChildList())
+                        {
+							LLFloater* child_floaterp = static_cast<LLFloater*>(childp);
+                            if (child_floaterp->canFocusStealFrontmost())
+                                break;
+							listTop.push_back(child_floaterp);
+                        }
+                    }
+
+                    bringToFront(floaterp, FALSE);
+
+                    // Restore top floaters
+					if (!listTop.empty())
+					{
+						for (LLView* childp : listTop)
+						{
+							sendChildToFront(childp);
+						}
+						mFrontChild = listTop.back();
+					}
+                }
+
 				break;
 			}
 		}
diff --git a/indra/llui/llfloater.h b/indra/llui/llfloater.h
index 668cd208a9..282f7a80ac 100644
--- a/indra/llui/llfloater.h
+++ b/indra/llui/llfloater.h
@@ -313,6 +313,9 @@ public:
 	/*virtual*/ void setVisible(BOOL visible); // do not override
 	/*virtual*/ void onVisibilityChange ( BOOL new_visibility ); // do not override
 	
+	bool            canFocusStealFrontmost() const { return mFocusStealsFrontmost; }
+	void            setFocusStealsFrontmost(bool wants_frontmost) { mFocusStealsFrontmost = wants_frontmost; }
+
 	void			setFrontmost(BOOL take_focus = TRUE, BOOL restore = TRUE);
      virtual void	setVisibleAndFrontmost(BOOL take_focus=TRUE, const LLSD& key = LLSD());
 	
@@ -481,6 +484,7 @@ private:
 	BOOL			mCanTearOff;
 	BOOL			mCanMinimize;
 	BOOL			mCanClose;
+    bool            mFocusStealsFrontmost = true;	// FALSE if we don't want the currently focused floater to cover this floater without user interaction
 	BOOL			mDragOnLeft;
 	BOOL			mResizable;
 
diff --git a/indra/llui/llfolderviewitem.cpp b/indra/llui/llfolderviewitem.cpp
index eba93beed9..d5988dadbc 100644
--- a/indra/llui/llfolderviewitem.cpp
+++ b/indra/llui/llfolderviewitem.cpp
@@ -874,7 +874,7 @@ void LLFolderViewItem::drawLabel(const LLFontGL * font, const F32 x, const F32 y
     //
     font->renderUTF8(mLabel, 0, x, y, color,
         LLFontGL::LEFT, LLFontGL::BOTTOM, LLFontGL::NORMAL, LLFontGL::NO_SHADOW,
-        S32_MAX, getRect().getWidth() - (S32) x - mLabelPaddingRight, &right_x, TRUE);
+        S32_MAX, getRect().getWidth() - (S32) x - mLabelPaddingRight, &right_x, /*use_ellipses*/TRUE, /*use_color*/FALSE);
 }
 
 void LLFolderViewItem::draw()
@@ -953,7 +953,7 @@ void LLFolderViewItem::draw()
 	{
 		font->renderUTF8( mLabelSuffix, 0, right_x, y, isFadeItem() ? color : (LLColor4)sSuffixColor,
 						  LLFontGL::LEFT, LLFontGL::BOTTOM, LLFontGL::NORMAL, LLFontGL::NO_SHADOW,
-						  S32_MAX, S32_MAX, &right_x, FALSE );
+						  S32_MAX, S32_MAX, &right_x, /*use_ellipses*/FALSE, /*use_color*/FALSE );
 	}
 
 	//--------------------------------------------------------------------------------//
@@ -966,7 +966,7 @@ void LLFolderViewItem::draw()
         F32 yy = (F32)getRect().getHeight() - font->getLineHeight() - (F32)mTextPad - (F32)TOP_PAD;
         font->renderUTF8( combined_string, filter_offset, match_string_left, yy,
             sFilterTextColor, LLFontGL::LEFT, LLFontGL::BOTTOM, LLFontGL::NORMAL, LLFontGL::NO_SHADOW,
-            filter_string_length, S32_MAX, &right_x, FALSE );
+            filter_string_length, S32_MAX, &right_x, /*use_ellipses*/FALSE, /*use_color*/FALSE );
     }
 
     //Gilbert Linden 9-20-2012: Although this should be legal, removing it because it causes the mLabelSuffix rendering to
diff --git a/indra/llui/lltextbase.cpp b/indra/llui/lltextbase.cpp
index 8effd866e0..b2c0577604 100644
--- a/indra/llui/lltextbase.cpp
+++ b/indra/llui/lltextbase.cpp
@@ -29,6 +29,7 @@
 
 #include "lltextbase.h"
 
+#include "llemojihelper.h"
 #include "lllocalcliprect.h"
 #include "llmenugl.h"
 #include "llscrollcontainer.h"
@@ -161,10 +162,12 @@ LLTextBase::Params::Params()
 	line_spacing("line_spacing"),
 	max_text_length("max_length", 255),
 	font_shadow("font_shadow"),
+	text_valign("text_valign"),
 	wrap("wrap"),
 	trusted_content("trusted_content", true),
 	always_show_icons("always_show_icons", false),
 	use_ellipses("use_ellipses", false),
+	use_color("use_color", false),
 	parse_urls("parse_urls", false),
 	force_urls_external("force_urls_external", false),
 	parse_highlights("parse_highlights", false)
@@ -208,6 +211,7 @@ LLTextBase::LLTextBase(const LLTextBase::Params &p)
 	mVPad(p.v_pad),
 	mHAlign(p.font_halign),
 	mVAlign(p.font_valign),
+	mTextVAlign(p.text_valign.isProvided() ? p.text_valign.getValue() : p.font_valign.getValue()),
 	mLineSpacingMult(p.line_spacing.multiple),
 	mLineSpacingPixels(p.line_spacing.pixels),
 	mClip(p.clip),
@@ -222,6 +226,7 @@ LLTextBase::LLTextBase(const LLTextBase::Params &p)
 	mPlainText ( p.plain_text ),
 	mWordWrap(p.wrap),
 	mUseEllipses( p.use_ellipses ),
+	mUseColor(p.use_color),
 	mParseHTML(p.parse_urls),
 	mForceUrlsExternal(p.force_urls_external),
 	mParseHighlights(p.parse_highlights),
@@ -576,7 +581,7 @@ void LLTextBase::drawCursor()
 				fontp = segmentp->getStyle()->getFont();
 				fontp->render(text, mCursorPos, cursor_rect, 
 					LLColor4(1.f - text_color.mV[VRED], 1.f - text_color.mV[VGREEN], 1.f - text_color.mV[VBLUE], alpha),
-					LLFontGL::LEFT, mVAlign,
+					LLFontGL::LEFT, mTextVAlign,
 					LLFontGL::NORMAL,
 					LLFontGL::NO_SHADOW,
 					1);
@@ -890,6 +895,25 @@ S32 LLTextBase::insertStringNoUndo(S32 pos, const LLWString &wstr, LLTextBase::s
 		}
 	}
 
+	// Insert special segments where necessary (insertSegment takes care of splitting normal text segments around them for us)
+	{
+		LLStyleSP emoji_style;
+		for (S32 text_kitty = 0, text_len = wstr.size(); text_kitty < text_len; text_kitty++)
+		{
+			if (LLStringOps::isEmoji(wstr[text_kitty]))
+			{
+				if (!emoji_style)
+				{
+					emoji_style = new LLStyle(getStyleParams());
+					emoji_style->setFont(LLFontGL::getFontEmoji());
+				}
+
+				S32 new_seg_start = pos + text_kitty;
+				insertSegment(new LLEmojiTextSegment(emoji_style, new_seg_start, new_seg_start + 1, *this));
+			}
+		}
+	}
+
 	getViewModel()->getEditableDisplay().insert(pos, wstr);
 
 	if ( truncate() )
@@ -1986,8 +2010,6 @@ LLTextBase::segment_set_t::iterator LLTextBase::getSegIterContaining(S32 index)
 		text_len = mLabel.getWString().length();
 	}
 
-	if (index > text_len) { return mSegments.end(); }
-
 	// when there are no segments, we return the end iterator, which must be checked by caller
 	if (mSegments.size() <= 1) { return mSegments.begin(); }
 
@@ -2011,8 +2033,6 @@ LLTextBase::segment_set_t::const_iterator LLTextBase::getSegIterContaining(S32 i
 		text_len = mLabel.getWString().length();
 	}
 
-	if (index > text_len) { return mSegments.end(); }
-
 	// when there are no segments, we return the end iterator, which must be checked by caller
 	if (mSegments.size() <= 1) { return mSegments.begin(); }
 
@@ -3306,12 +3326,13 @@ F32 LLNormalTextSegment::drawClippedSegment(S32 seg_start, S32 seg_end, S32 sele
 		font->render(text, start, 
 				 rect, 
 				 color, 
-				 LLFontGL::LEFT, mEditor.mVAlign, 
+				 LLFontGL::LEFT, mEditor.mTextVAlign,
 				 LLFontGL::NORMAL, 
 				 mStyle->getShadowType(), 
 				 length,
 				 &right_x, 
-				 mEditor.getUseEllipses());
+				 mEditor.getUseEllipses(),
+				 mEditor.getUseColor());
 	}
 	rect.mLeft = right_x;
 	
@@ -3325,12 +3346,13 @@ F32 LLNormalTextSegment::drawClippedSegment(S32 seg_start, S32 seg_end, S32 sele
 		font->render(text, start, 
 				 rect,
 				 mStyle->getSelectedColor().get(),
-				 LLFontGL::LEFT, mEditor.mVAlign, 
+				 LLFontGL::LEFT, mEditor.mTextVAlign,
 				 LLFontGL::NORMAL, 
 				 LLFontGL::NO_SHADOW, 
 				 length,
 				 &right_x, 
-				 mEditor.getUseEllipses());
+				 mEditor.getUseEllipses(),
+				 mEditor.getUseColor());
 	}
 	rect.mLeft = right_x;
 	if( selection_end < seg_end )
@@ -3342,12 +3364,13 @@ F32 LLNormalTextSegment::drawClippedSegment(S32 seg_start, S32 seg_end, S32 sele
 		font->render(text, start, 
 				 rect, 
 				 color, 
-				 LLFontGL::LEFT, mEditor.mVAlign, 
+				 LLFontGL::LEFT, mEditor.mTextVAlign,
 				 LLFontGL::NORMAL, 
 				 mStyle->getShadowType(), 
 				 length,
 				 &right_x, 
-				 mEditor.getUseEllipses());
+				 mEditor.getUseEllipses(),
+				 mEditor.getUseColor());
 	}
     return right_x;
 }
@@ -3579,6 +3602,33 @@ const S32 LLLabelTextSegment::getLength() const
 }
 
 //
+// LLEmojiTextSegment
+//
+LLEmojiTextSegment::LLEmojiTextSegment(LLStyleConstSP style, S32 start, S32 end, LLTextBase& editor)
+	: LLNormalTextSegment(style, start, end, editor)
+{
+}
+
+LLEmojiTextSegment::LLEmojiTextSegment(const LLColor4& color, S32 start, S32 end, LLTextBase& editor, BOOL is_visible)
+	: LLNormalTextSegment(color, start, end, editor, is_visible)
+{
+}
+
+BOOL LLEmojiTextSegment::handleToolTip(S32 x, S32 y, MASK mask)
+{
+	if (mTooltip.empty())
+	{
+		LLWString emoji = getWText().substr(getStart(), getEnd() - getStart());
+		if (!emoji.empty())
+		{
+			mTooltip = LLEmojiHelper::instance().getToolTip(emoji[0]);
+		}
+	}
+
+	return LLNormalTextSegment::handleToolTip(x, y, mask);
+}
+
+//
 // LLOnHoverChangeableTextSegment
 //
 
diff --git a/indra/llui/lltextbase.h b/indra/llui/lltextbase.h
index e3cf56a5ee..7e1f727607 100644
--- a/indra/llui/lltextbase.h
+++ b/indra/llui/lltextbase.h
@@ -178,6 +178,18 @@ protected:
 	/*virtual*/	const S32			getLength()	const;
 };
 
+// Text segment that represents a single emoji character that has a different style (=font size) than the rest of
+// the document it belongs to
+class LLEmojiTextSegment : public LLNormalTextSegment
+{
+public:
+	LLEmojiTextSegment(LLStyleConstSP style, S32 start, S32 end, LLTextBase& editor);
+	LLEmojiTextSegment(const LLColor4& color, S32 start, S32 end, LLTextBase& editor, BOOL is_visible = TRUE);
+
+	bool canEdit() const override { return false; }
+	BOOL handleToolTip(S32 x, S32 y, MASK mask);
+};
+
 // Text segment that changes it's style depending of mouse pointer position ( is it inside or outside segment)
 class LLOnHoverChangeableTextSegment : public LLNormalTextSegment
 {
@@ -316,6 +328,7 @@ public:
 								plain_text,
 								wrap,
 								use_ellipses,
+								use_color,
 								parse_urls,
 								force_urls_external,
 								parse_highlights,
@@ -335,6 +348,8 @@ public:
 
 		Optional<LLFontGL::ShadowType>	font_shadow;
 
+		Optional<LLFontGL::VAlign> text_valign;
+
 		Params();
 	};
 
@@ -394,6 +409,7 @@ public:
 	// used by LLTextSegment layout code
 	bool					getWordWrap() { return mWordWrap; }
 	bool					getUseEllipses() { return mUseEllipses; }
+	bool					getUseColor() { return mUseColor; }
 	bool					truncate(); // returns true of truncation occurred
 
 	bool					isContentTrusted() {return mTrustedContent;}
@@ -687,8 +703,9 @@ protected:
 	// configuration
 	S32							mHPad;				// padding on left of text
 	S32							mVPad;				// padding above text
-	LLFontGL::HAlign			mHAlign;
-	LLFontGL::VAlign			mVAlign;
+	LLFontGL::HAlign			mHAlign;			// horizontal alignment of the document in its entirety
+	LLFontGL::VAlign			mVAlign;			// vertical alignment of the document in its entirety
+	LLFontGL::VAlign			mTextVAlign;		// vertical alignment of a text segment within a single line of text
 	F32							mLineSpacingMult;	// multiple of line height used as space for a single line of text (e.g. 1.5 to get 50% padding)
 	S32							mLineSpacingPixels;	// padding between lines
 	bool						mBorderVisible;
@@ -697,6 +714,7 @@ protected:
 	bool						mParseHighlights;	// highlight user-defined keywords
 	bool                		mWordWrap;
 	bool						mUseEllipses;
+	bool						mUseColor;
 	bool						mTrackEnd;			// if true, keeps scroll position at end of document during resize
 	bool						mReadOnly;
 	bool						mBGVisible;			// render background?
diff --git a/indra/llui/lltexteditor.cpp b/indra/llui/lltexteditor.cpp
index b1f8b00cab..168c260c7d 100644
--- a/indra/llui/lltexteditor.cpp
+++ b/indra/llui/lltexteditor.cpp
@@ -43,6 +43,7 @@
 #include "llmath.h"
 
 #include "llclipboard.h"
+#include "llemojihelper.h"
 #include "llscrollbar.h"
 #include "llstl.h"
 #include "llstring.h"
@@ -238,6 +239,7 @@ LLTextEditor::Params::Params()
 	default_color("default_color"),
     commit_on_focus_lost("commit_on_focus_lost", false),
 	show_context_menu("show_context_menu"),
+	show_emoji_helper("show_emoji_helper"),
 	enable_tooltip_paste("enable_tooltip_paste")
 {
 	addSynonym(prevalidate_callback, "text_type");
@@ -259,6 +261,7 @@ LLTextEditor::LLTextEditor(const LLTextEditor::Params& p) :
 	mPrevalidateFunc(p.prevalidate_callback()),
 	mContextMenu(NULL),
 	mShowContextMenu(p.show_context_menu),
+	mShowEmojiHelper(p.show_emoji_helper),
 	mEnableTooltipPaste(p.enable_tooltip_paste),
 	mPassDelete(FALSE),
 	mKeepSelectionOnReturn(false)
@@ -501,6 +504,15 @@ void LLTextEditor::getSegmentsInRange(LLTextEditor::segment_vec_t& segments_out,
 	}
 }
 
+void LLTextEditor::setShowEmojiHelper(bool show) {
+	if (!mShowEmojiHelper)
+	{
+		LLEmojiHelper::instance().hideHelper(this);
+	}
+
+	mShowEmojiHelper = show;
+}
+
 BOOL LLTextEditor::selectionContainsLineBreaks()
 {
 	if (hasSelection())
@@ -664,6 +676,21 @@ void LLTextEditor::selectByCursorPosition(S32 prev_cursor_pos, S32 next_cursor_p
 	endSelection();
 }
 
+void LLTextEditor::handleEmojiCommit(const LLWString& wstr)
+{
+	LLWString wtext(getWText()); S32 shortCodePos;
+	if (LLEmojiHelper::isCursorInEmojiCode(wtext, mCursorPos, &shortCodePos))
+	{
+		remove(shortCodePos, mCursorPos - shortCodePos, true);
+
+		auto styleParams = LLStyle::Params();
+		styleParams.font = LLFontGL::getFontEmoji();
+		insert(shortCodePos, wstr, false, new LLEmojiTextSegment(new LLStyle(styleParams), shortCodePos, shortCodePos + wstr.size(), *this));
+
+		setCursorPos(shortCodePos + 1);
+	}
+}
+
 BOOL LLTextEditor::handleMouseDown(S32 x, S32 y, MASK mask)
 {
 	BOOL	handled = FALSE;
@@ -930,6 +957,12 @@ BOOL LLTextEditor::handleDoubleClick(S32 x, S32 y, MASK mask)
 
 S32 LLTextEditor::execute( TextCmd* cmd )
 {
+	if (!mReadOnly && mShowEmojiHelper)
+	{
+		// Any change to our contents should always hide the helper
+		LLEmojiHelper::instance().hideHelper(this);
+	}
+
 	S32 delta = 0;
 	if( cmd->execute(this, &delta) )
 	{
@@ -1124,6 +1157,17 @@ void LLTextEditor::addChar(llwchar wc)
 
 	setCursorPos(mCursorPos + addChar( mCursorPos, wc ));
 
+	if (!mReadOnly && mShowEmojiHelper)
+	{
+		LLWString wtext(getWText()); S32 shortCodePos;
+		if (LLEmojiHelper::isCursorInEmojiCode(wtext, mCursorPos, &shortCodePos))
+		{
+			const LLRect cursorRect = getLocalRectFromDocIndex(mCursorPos - 1);
+			const LLWString shortCode = wtext.substr(shortCodePos, mCursorPos - shortCodePos);
+			LLEmojiHelper::instance().showHelper(this, cursorRect.mLeft, cursorRect.mTop, wstring_to_utf8str(shortCode), std::bind(&LLTextEditor::handleEmojiCommit, this, std::placeholders::_1));
+		}
+	}
+
 	if (!mReadOnly && mAutoreplaceCallback != NULL)
 	{
 		// autoreplace the text, if necessary
@@ -1774,6 +1818,11 @@ BOOL LLTextEditor::handleKeyHere(KEY key, MASK mask )
 	}
 	else 
 	{
+		if (!mReadOnly && mShowEmojiHelper && LLEmojiHelper::instance().handleKey(this, key, mask))
+		{
+			return TRUE;
+		}
+
 		if (mEnableTooltipPaste &&
 			LLToolTipMgr::instance().toolTipVisible() && 
 			KEY_TAB == key)
@@ -1815,6 +1864,12 @@ BOOL LLTextEditor::handleKeyHere(KEY key, MASK mask )
 	{
 		resetCursorBlink();
 		needsScroll();
+
+		if (mShowEmojiHelper)
+		{
+			// Dismiss the helper whenever we handled a key that it didn't
+			LLEmojiHelper::instance().hideHelper(this);
+		}
 	}
 
 	return handled;
diff --git a/indra/llui/lltexteditor.h b/indra/llui/lltexteditor.h
index 1a10d2fd1e..f7621b39f0 100644
--- a/indra/llui/lltexteditor.h
+++ b/indra/llui/lltexteditor.h
@@ -60,6 +60,7 @@ public:
 								ignore_tab,
 								commit_on_focus_lost,
 								show_context_menu,
+								show_emoji_helper,
 								enable_tooltip_paste,
 								auto_indent;
 
@@ -91,6 +92,8 @@ public:
 
 	static S32		spacesPerTab();
 
+	        void    handleEmojiCommit(const LLWString& wstr);
+
 	// mousehandler overrides
 	virtual BOOL	handleMouseDown(S32 x, S32 y, MASK mask);
 	virtual BOOL	handleMouseUp(S32 x, S32 y, MASK mask);
@@ -202,6 +205,9 @@ public:
 	void			setShowContextMenu(bool show) { mShowContextMenu = show; }
 	bool			getShowContextMenu() const { return mShowContextMenu; }
 
+	void			setShowEmojiHelper(bool show);
+	bool			getShowEmojiHelper() const { return mShowEmojiHelper; }
+
 	void			setPassDelete(BOOL b) { mPassDelete = b; }
 
 protected:
@@ -318,6 +324,7 @@ private:
 
 	BOOL			mAllowEmbeddedItems;
 	bool			mShowContextMenu;
+	bool			mShowEmojiHelper;
 	bool			mEnableTooltipPaste;
 	bool			mPassDelete;
 	bool			mKeepSelectionOnReturn;	// disabling of removing selected text after pressing of Enter
diff --git a/indra/llui/llview.cpp b/indra/llui/llview.cpp
index 9ba71913d0..74abe54690 100644
--- a/indra/llui/llview.cpp
+++ b/indra/llui/llview.cpp
@@ -1324,7 +1324,7 @@ void LLView::drawDebugRect()
 										debug_rect.getWidth(), debug_rect.getHeight());
 			LLFontGL::getFontSansSerifSmall()->renderUTF8(debug_text, 0, (F32)x, (F32)y, border_color,
 												LLFontGL::HCENTER, LLFontGL::BASELINE, LLFontGL::NORMAL, LLFontGL::NO_SHADOW,
-												S32_MAX, S32_MAX, NULL, FALSE);
+												S32_MAX, S32_MAX, NULL, /*use_ellipses*/FALSE, /*use_color*/FALSE);
 		}
 	}
 	LLUI::popMatrix();