Merge branch 'main' into marchcat/x-merge

# Conflicts:
#	indra/llcommon/llstring.cpp
#	indra/llcommon/llstring.h

1 files changed, 1346 insertions, 0 deletions

diff --git a/indra/newview/llfloateremojipicker.cpp b/indra/newview/llfloateremojipicker.cpp
new file mode 100644
index 0000000000..1578caa39c
--- /dev/null
+++ b/indra/newview/llfloateremojipicker.cpp
@@ -0,0 +1,1346 @@
+/**
+ * @file llfloateremojipicker.cpp
+ *
+ * $LicenseInfo:firstyear=2003&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2010, 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 "llviewerprecompiledheaders.h"
+
+#include "llfloateremojipicker.h"
+
+#include "llappviewer.h"
+#include "llbutton.h"
+#include "llcombobox.h"
+#include "llemojidictionary.h"
+#include "llemojihelper.h"
+#include "llfloaterreg.h"
+#include "llkeyboard.h"
+#include "llscrollcontainer.h"
+#include "llscrollingpanellist.h"
+#include "llscrolllistctrl.h"
+#include "llscrolllistitem.h"
+#include "llsdserialize.h"
+#include "lltextbox.h" 
+#include "llviewerchat.h" 
+
+namespace {
+// The following variables and constants are used for storing the floater state
+// between different lifecycles of the floater and different sissions of the viewer
+
+// Floater constants
+static const S32 ALL_EMOJIS_GROUP_INDEX = -2;
+// https://www.compart.com/en/unicode/U+1F50D
+static const S32 ALL_EMOJIS_IMAGE_INDEX = 0x1F50D;
+static const S32 USED_EMOJIS_GROUP_INDEX = -1;
+// https://www.compart.com/en/unicode/U+23F2
+static const S32 USED_EMOJIS_IMAGE_INDEX = 0x23F2;
+// https://www.compart.com/en/unicode/U+1F6D1
+static const S32 EMPTY_LIST_IMAGE_INDEX = 0x1F6D1;
+// The following categories should follow the required alphabetic order
+static const std::string RECENTLY_USED_CATEGORY = "1 recently used";
+static const std::string FREQUENTLY_USED_CATEGORY = "2 frequently used";
+
+// Floater state related variables
+static std::list<llwchar> sRecentlyUsed;
+static std::list<std::pair<llwchar, U32>> sFrequentlyUsed;
+
+// State file related values
+static std::string sStateFileName;
+static const std::string sKeyRecentlyUsed("RecentlyUsed");
+static const std::string sKeyFrequentlyUsed("FrequentlyUsed");
+}
+
+class LLEmojiGridRow : public LLScrollingPanel
+{
+public:
+    LLEmojiGridRow(const LLPanel::Params& panel_params,
+        const LLScrollingPanelList::Params& list_params)
+        : LLScrollingPanel(panel_params)
+        , mList(new LLScrollingPanelList(list_params))
+    {
+        addChild(mList);
+    }
+
+    virtual void updatePanel(BOOL allow_modify) override {}
+
+public:
+    LLScrollingPanelList* mList;
+};
+
+class LLEmojiGridDivider : public LLScrollingPanel
+{
+public:
+    LLEmojiGridDivider(const LLPanel::Params& panel_params, std::string text)
+        : LLScrollingPanel(panel_params)
+        , mText(utf8string_to_wstring(text))
+    {
+    }
+
+    virtual void draw() override
+    {
+        LLScrollingPanel::draw();
+
+        F32 x = 4; // padding-left
+        F32 y = getRect().getHeight() / 2;
+        LLFontGL::getFontSansSerif()->render(
+            mText,                      // wstr
+            0,                          // begin_offset
+            x,                          // x
+            y,                          // y
+            LLColor4::white,            // color
+            LLFontGL::LEFT,             // halign
+            LLFontGL::VCENTER,          // valign
+            LLFontGL::NORMAL,           // style
+            LLFontGL::DROP_SHADOW_SOFT, // shadow
+            mText.size());              // max_chars
+    }
+
+    virtual void updatePanel(BOOL allow_modify) override {}
+
+private:
+    const LLWString mText;
+};
+
+class LLEmojiGridIcon : public LLScrollingPanel
+{
+public:
+    LLEmojiGridIcon(
+        const LLPanel::Params& panel_params
+        , const LLEmojiSearchResult& emoji)
+        : LLScrollingPanel(panel_params)
+        , mData(emoji)
+        , mText(LLWString(1, emoji.Character))
+    {
+    }
+
+    virtual void draw() override
+    {
+        LLScrollingPanel::draw();
+
+        F32 x = getRect().getWidth() / 2;
+        F32 y = getRect().getHeight() / 2;
+        LLFontGL::getFontEmoji()->render(
+            mText,                      // wstr
+            0,                          // begin_offset
+            x,                          // x
+            y,                          // y
+            LLColor4::white,            // color
+            LLFontGL::HCENTER,          // halign
+            LLFontGL::VCENTER,          // valign
+            LLFontGL::NORMAL,           // style
+            LLFontGL::DROP_SHADOW_SOFT, // shadow
+            1);                         // max_chars
+    }
+
+    virtual void updatePanel(BOOL allow_modify) override {}
+
+    const LLEmojiSearchResult& getData() const { return mData; }
+    LLWString getText() const { return mText; }
+
+private:
+    const LLEmojiSearchResult mData;
+    const LLWString mText;
+};
+
+class LLEmojiPreviewPanel : public LLPanel
+{
+public:
+    LLEmojiPreviewPanel()
+        : LLPanel()
+    {
+    }
+
+    void setIcon(const LLEmojiGridIcon* icon)
+    {
+        if (icon)
+        {
+            setData(icon->getData().Character, icon->getData().String, icon->getData().Begin, icon->getData().End);
+        }
+        else
+        {
+            setData(0, LLStringUtil::null, 0, 0);
+        }
+    }
+
+    void setData(llwchar emoji, std::string title, size_t begin, size_t end)
+    {
+        mWStr = LLWString(1, emoji);
+        mEmoji = emoji;
+        mTitle = title;
+        mBegin = begin;
+        mEnd = end;
+    }
+
+    virtual void draw() override
+    {
+        LLPanel::draw();
+
+        S32 clientHeight = getRect().getHeight();
+        S32 clientWidth = getRect().getWidth();
+        S32 iconWidth = clientHeight;
+
+        F32 centerX = 0.5f * iconWidth;
+        F32 centerY = 0.5f * clientHeight;
+        drawIcon(centerX, centerY - 1, iconWidth);
+
+        static LLColor4 defaultColor(0.75f, 0.75f, 0.75f, 1.0f);
+        LLColor4 textColor = LLUIColorTable::instance().getColor("MenuItemEnabledColor", defaultColor);
+        S32 max_pixels = clientWidth - iconWidth;
+        drawName(iconWidth, centerY, max_pixels, textColor);
+    }
+
+protected:
+    void drawIcon(F32 x, F32 y, S32 max_pixels)
+    {
+        LLFontGL::getFontEmojiHuge()->render(
+            mWStr,                      // wstr
+            0,                          // begin_offset
+            x,                          // x
+            y,                          // y
+            LLColor4::white,            // color
+            LLFontGL::HCENTER,          // halign
+            LLFontGL::VCENTER,          // valign
+            LLFontGL::NORMAL,           // style
+            LLFontGL::DROP_SHADOW_SOFT, // shadow
+            1,                          // max_chars
+            max_pixels);                // max_pixels
+    }
+
+    void drawName(F32 x, F32 y, S32 max_pixels, LLColor4& color)
+    {
+        F32 x0 = x;
+        F32 x1 = max_pixels;
+        LLFontGL* font = LLFontGL::getFontEmoji();
+        if (mBegin)
+        {
+            std::string text = mTitle.substr(0, mBegin);
+            font->renderUTF8(
+                text,                       // text
+                0,                          // begin_offset
+                x0,                         // x
+                y,                          // y
+                color,                      // color
+                LLFontGL::LEFT,             // halign
+                LLFontGL::VCENTER,          // valign
+                LLFontGL::NORMAL,           // style
+                LLFontGL::DROP_SHADOW_SOFT, // shadow
+                text.size(),                // max_chars
+                x1);                        // max_pixels
+            F32 dx = font->getWidthF32(text);
+            x0 += dx;
+            x1 -= dx;
+        }
+        if (x1 > 0 && mEnd > mBegin)
+        {
+            std::string text = mTitle.substr(mBegin, mEnd - mBegin);
+            font->renderUTF8(
+                text,                       // text
+                0,                          // begin_offset
+                x0,                         // x
+                y,                          // y
+                LLColor4::yellow6,          // color
+                LLFontGL::LEFT,             // halign
+                LLFontGL::VCENTER,          // valign
+                LLFontGL::NORMAL,           // style
+                LLFontGL::DROP_SHADOW_SOFT, // shadow
+                text.size(),                // max_chars
+                x1);                        // max_pixels
+            F32 dx = font->getWidthF32(text);
+            x0 += dx;
+            x1 -= dx;
+        }
+        if (x1 > 0 && mEnd < mTitle.size())
+        {
+            std::string text = mEnd ? mTitle.substr(mEnd) : mTitle;
+            font->renderUTF8(
+                text,                       // text
+                0,                          // begin_offset
+                x0,                         // x
+                y,                          // y
+                color,                      // color
+                LLFontGL::LEFT,             // halign
+                LLFontGL::VCENTER,          // valign
+                LLFontGL::NORMAL,           // style
+                LLFontGL::DROP_SHADOW_SOFT, // shadow
+                text.size(),                // max_chars
+                x1);                        // max_pixels
+        }
+    }
+
+private:
+    llwchar mEmoji;
+    LLWString mWStr;
+    std::string mTitle;
+    size_t mBegin;
+    size_t mEnd;
+};
+
+LLFloaterEmojiPicker::LLFloaterEmojiPicker(const LLSD& key)
+: super(key)
+{
+    // This floater should hover on top of our dependent (with the dependent having the focus)
+    setFocusStealsFrontmost(FALSE);
+    setBackgroundVisible(FALSE);
+    setAutoFocus(FALSE);
+
+    loadState();
+}
+
+BOOL LLFloaterEmojiPicker::postBuild()
+{
+    mGroups = getChild<LLPanel>("Groups");
+    mBadge = getChild<LLPanel>("Badge");
+    mEmojiScroll = getChild<LLScrollContainer>("EmojiGridContainer");
+    mEmojiGrid = getChild<LLScrollingPanelList>("EmojiGrid");
+    mDummy = getChild<LLTextBox>("Dummy");
+
+    mPreview = new LLEmojiPreviewPanel();
+    mPreview->setVisible(FALSE);
+    addChild(mPreview);
+
+    return LLFloater::postBuild();
+}
+
+void LLFloaterEmojiPicker::onOpen(const LLSD& key)
+{
+    mHint = key["hint"].asString();
+
+    LLEmojiHelper::instance().setIsHideDisabled(mHint.empty());
+    mFilterPattern = mHint;
+
+    initialize();
+
+    gFloaterView->adjustToFitScreen(this, FALSE);
+}
+
+void LLFloaterEmojiPicker::dirtyRect()
+{
+    super::dirtyRect();
+
+    if (!mPreview)
+        return;
+
+    const S32 HPADDING = 4;
+    const S32 VOFFSET = 12;
+    LLRect rect(HPADDING, mDummy->getRect().mTop + 6, getRect().getWidth() - HPADDING, VOFFSET);
+    if (mPreview->getRect() != rect)
+    {
+        mPreview->setRect(rect);
+    }
+
+    if (mEmojiScroll && mEmojiGrid)
+    {
+        S32 outer_width = mEmojiScroll->getRect().getWidth();
+        S32 inner_width = mEmojiGrid->getRect().getWidth();
+        if (outer_width != inner_width)
+        {
+            resizeGroupButtons();
+            fillEmojis(true);
+        }
+    }
+}
+
+void LLFloaterEmojiPicker::initialize()
+{
+    S32 groupIndex = mSelectedGroupIndex && mSelectedGroupIndex <= mFilteredEmojiGroups.size() ?
+        mFilteredEmojiGroups[mSelectedGroupIndex - 1] : ALL_EMOJIS_GROUP_INDEX;
+
+    fillGroups();
+
+    if (mFilteredEmojis.empty())
+    {
+        if (!mHint.empty())
+        {
+            hideFloater();
+            return;
+        }
+
+        mGroups->setVisible(FALSE);
+        mFocusedIconRow = -1;
+        mFocusedIconCol = -1;
+        mFocusedIcon = nullptr;
+        mHoveredIcon = nullptr;
+        mEmojiScroll->goToTop();
+        mEmojiGrid->clearPanels();
+
+        if (mFilterPattern.empty())
+        {
+            showPreview(false);
+        }
+        else
+        {
+            const std::string prompt("No emoji found for ");
+            std::string title(prompt + '"' + mFilterPattern.substr(1) + '"');
+            mPreview->setData(EMPTY_LIST_IMAGE_INDEX, title, prompt.size() + 1, title.size() - 1);
+            showPreview(true);
+        }
+        return;
+    }
+
+    mGroups->setVisible(TRUE);
+    mPreview->setIcon(nullptr);
+    showPreview(true);
+
+    mSelectedGroupIndex = groupIndex == ALL_EMOJIS_GROUP_INDEX ? 0 :
+        (1 + std::distance(mFilteredEmojiGroups.begin(),
+            std::find(mFilteredEmojiGroups.begin(), mFilteredEmojiGroups.end(), groupIndex))) %
+        (1 + mFilteredEmojiGroups.size());
+
+    mGroupButtons[mSelectedGroupIndex]->setToggleState(TRUE);
+    mGroupButtons[mSelectedGroupIndex]->setUseFontColor(TRUE);
+
+    fillEmojis();
+}
+
+void LLFloaterEmojiPicker::fillGroups()
+{
+    // Do not use deleteAllChildren() because mBadge shouldn't be removed
+    for (LLButton* button : mGroupButtons)
+    {
+        mGroups->removeChild(button);
+    }
+    mFilteredEmojiGroups.clear();
+    mFilteredEmojis.clear();
+    mGroupButtons.clear();
+
+    LLButton::Params params;
+    params.font = LLFontGL::getFontEmoji();
+
+    LLRect rect;
+    rect.mTop = mGroups->getRect().getHeight();
+    rect.mBottom = mBadge->getRect().getHeight();
+
+    // Create button for "All categories"
+    createGroupButton(params, rect, ALL_EMOJIS_IMAGE_INDEX);
+
+    // Create group and button for "Recently used" and/or "Frequently used"
+    if (!sRecentlyUsed.empty() || !sFrequentlyUsed.empty())
+    {
+        std::map<std::string, std::vector<LLEmojiSearchResult>> cats;
+        fillCategoryRecentlyUsed(cats);
+        fillCategoryFrequentlyUsed(cats);
+
+        if (!cats.empty())
+        {
+            mFilteredEmojiGroups.push_back(USED_EMOJIS_GROUP_INDEX);
+            mFilteredEmojis.emplace_back(cats);
+            createGroupButton(params, rect, USED_EMOJIS_IMAGE_INDEX);
+        }
+    }
+
+    const std::vector<LLEmojiGroup>& groups = LLEmojiDictionary::instance().getGroups();
+
+    // List all categories in the dictionary
+    for (U32 i = 0; i < groups.size(); ++i)
+    {
+        std::map<std::string, std::vector<LLEmojiSearchResult>> cats;
+
+        fillGroupEmojis(cats, i);
+
+        if (!cats.empty())
+        {
+            mFilteredEmojiGroups.push_back(i);
+            mFilteredEmojis.emplace_back(cats);
+            createGroupButton(params, rect, groups[i].Character);
+        }
+    }
+
+    resizeGroupButtons();
+}
+
+void LLFloaterEmojiPicker::fillCategoryRecentlyUsed(std::map<std::string, std::vector<LLEmojiSearchResult>>& cats)
+{
+    if (sRecentlyUsed.empty())
+        return;
+
+    std::vector<LLEmojiSearchResult> emojis;
+
+    // In case of empty mFilterPattern we'd use sRecentlyUsed directly
+    if (!mFilterPattern.empty())
+    {
+        // List all emojis in "Recently used"
+        const LLEmojiDictionary::emoji2descr_map_t& emoji2descr = LLEmojiDictionary::instance().getEmoji2Descr();
+        std::size_t begin, end;
+        for (llwchar emoji : sRecentlyUsed)
+        {
+            auto e2d = emoji2descr.find(emoji);
+            if (e2d != emoji2descr.end() && !e2d->second->ShortCodes.empty())
+            {
+                const std::string shortcode(e2d->second->ShortCodes.front());
+                if (LLEmojiDictionary::searchInShortCode(begin, end, shortcode, mFilterPattern))
+                {
+                    emojis.emplace_back(emoji, shortcode, begin, end);
+                }
+            }
+        }
+        if (emojis.empty())
+            return;
+    }
+
+    cats.emplace(std::make_pair(RECENTLY_USED_CATEGORY, emojis));
+}
+
+void LLFloaterEmojiPicker::fillCategoryFrequentlyUsed(std::map<std::string, std::vector<LLEmojiSearchResult>>& cats)
+{
+    if (sFrequentlyUsed.empty())
+        return;
+
+    std::vector<LLEmojiSearchResult> emojis;
+
+    // In case of empty mFilterPattern we'd use sFrequentlyUsed directly
+    if (!mFilterPattern.empty())
+    {
+        // List all emojis in "Frequently used"
+        const LLEmojiDictionary::emoji2descr_map_t& emoji2descr = LLEmojiDictionary::instance().getEmoji2Descr();
+        std::size_t begin, end;
+        for (const auto& emoji : sFrequentlyUsed)
+        {
+            auto e2d = emoji2descr.find(emoji.first);
+            if (e2d != emoji2descr.end() && !e2d->second->ShortCodes.empty())
+            {
+                const std::string shortcode(e2d->second->ShortCodes.front());
+                if (LLEmojiDictionary::searchInShortCode(begin, end, shortcode, mFilterPattern))
+                {
+                    emojis.emplace_back(emoji.first, shortcode, begin, end);
+                }
+            }
+        }
+        if (emojis.empty())
+            return;
+    }
+
+    cats.emplace(std::make_pair(FREQUENTLY_USED_CATEGORY, emojis));
+}
+
+void LLFloaterEmojiPicker::fillGroupEmojis(std::map<std::string, std::vector<LLEmojiSearchResult>>& cats, U32 index)
+{
+    const std::vector<LLEmojiGroup>& groups = LLEmojiDictionary::instance().getGroups();
+    const LLEmojiDictionary::cat2descrs_map_t& category2Descr = LLEmojiDictionary::instance().getCategory2Descrs();
+
+    for (const std::string& category : groups[index].Categories)
+    {
+        const LLEmojiDictionary::cat2descrs_map_t::const_iterator& c2d = category2Descr.find(category);
+        if (c2d == category2Descr.end())
+            continue;
+
+        std::vector<LLEmojiSearchResult> emojis;
+
+        // In case of empty mFilterPattern we'd use category2Descr directly
+        if (!mFilterPattern.empty())
+        {
+            // List all emojis in category
+            std::size_t begin, end;
+            for (const LLEmojiDescriptor* descr : c2d->second)
+            {
+                if (!descr->ShortCodes.empty())
+                {
+                    const std::string shortcode(descr->ShortCodes.front());
+                    if (LLEmojiDictionary::searchInShortCode(begin, end, shortcode, mFilterPattern))
+                    {
+                        emojis.emplace_back(descr->Character, shortcode, begin, end);
+                    }
+                }
+            }
+            if (emojis.empty())
+                continue;
+        }
+
+        cats.emplace(std::make_pair(category, emojis));
+    }
+}
+
+void LLFloaterEmojiPicker::createGroupButton(LLButton::Params& params, const LLRect& rect, llwchar emoji)
+{
+    LLButton* button = LLUICtrlFactory::create<LLButton>(params);
+    button->setClickedCallback([this](LLUICtrl* ctrl, const LLSD&) { onGroupButtonClick(ctrl); });
+    button->setMouseEnterCallback([this](LLUICtrl* ctrl, const LLSD&) { onGroupButtonMouseEnter(ctrl); });
+    button->setMouseLeaveCallback([this](LLUICtrl* ctrl, const LLSD&) { onGroupButtonMouseLeave(ctrl); });
+
+    button->setRect(rect);
+    button->setTabStop(FALSE);
+    button->setLabel(LLUIString(LLWString(1, emoji)));
+    button->setUseFontColor(FALSE);
+
+    mGroupButtons.push_back(button);
+    mGroups->addChild(button);
+}
+
+void LLFloaterEmojiPicker::resizeGroupButtons()
+{
+    U32 groupCount = (U32)mGroupButtons.size();
+    if (!groupCount)
+        return;
+
+    S32 totalWidth = mGroups->getRect().getWidth();
+    S32 badgeWidth = totalWidth / groupCount;
+    S32 leftOffset = (totalWidth - badgeWidth * groupCount) / 2;
+
+    for (U32 i = 0; i < groupCount; ++i)
+    {
+        LLRect rect = mGroupButtons[i]->getRect();
+        rect.mLeft = leftOffset + badgeWidth * i;
+        rect.mRight = rect.mLeft + badgeWidth;
+        mGroupButtons[i]->setRect(rect);
+    }
+
+    LLRect rect = mBadge->getRect();
+    rect.mLeft = leftOffset + badgeWidth * mSelectedGroupIndex;
+    rect.mRight = rect.mLeft + badgeWidth;
+    mBadge->setRect(rect);
+}
+
+void LLFloaterEmojiPicker::selectEmojiGroup(U32 index)
+{
+    if (index == mSelectedGroupIndex || index >= mGroupButtons.size())
+        return;
+
+    if (mSelectedGroupIndex < mGroupButtons.size())
+    {
+        mGroupButtons[mSelectedGroupIndex]->setUseFontColor(FALSE);
+        mGroupButtons[mSelectedGroupIndex]->setToggleState(FALSE);
+    }
+
+    mSelectedGroupIndex = index;
+    mGroupButtons[mSelectedGroupIndex]->setToggleState(TRUE);
+    mGroupButtons[mSelectedGroupIndex]->setUseFontColor(TRUE);
+
+    LLButton* button = mGroupButtons[mSelectedGroupIndex];
+    LLRect rect = mBadge->getRect();
+    rect.mLeft = button->getRect().mLeft;
+    rect.mRight = button->getRect().mRight;
+    mBadge->setRect(rect);
+
+    fillEmojis();
+}
+
+void LLFloaterEmojiPicker::fillEmojis(bool fromResize)
+{
+    S32 scrollbar_size = mEmojiScroll->getSize();
+    if (scrollbar_size < 0)
+    {
+        static LLUICachedControl<S32> scrollbar_size_control("UIScrollbarSize", 0);
+        scrollbar_size = scrollbar_size_control;
+    }
+
+    const S32 scroll_width = mEmojiScroll->getRect().getWidth();
+    const S32 client_width = scroll_width - scrollbar_size - mEmojiScroll->getBorderWidth() * 2;
+    const S32 grid_padding = mEmojiGrid->getPadding();
+    const S32 icon_spacing = mEmojiGrid->getSpacing();
+    const S32 row_width = client_width - grid_padding * 2;
+    const S32 icon_size = 28; // icon width and height
+    const S32 max_icons = llmax(1, (row_width + icon_spacing) / (icon_size + icon_spacing));
+
+    // Optimization: don't rearrange for different widths with the same maxIcons
+    if (fromResize && (max_icons == mRecentMaxIcons))
+        return;
+
+    mRecentMaxIcons = max_icons;
+
+    mFocusedIconRow = 0;
+    mFocusedIconCol = 0;
+    mFocusedIcon = nullptr;
+    mHoveredIcon = nullptr;
+    mEmojiScroll->goToTop();
+    mEmojiGrid->clearPanels();
+    mPreview->setIcon(nullptr);
+
+    if (mEmojiGrid->getRect().getWidth() != client_width)
+    {
+        LLRect rect = mEmojiGrid->getRect();
+        rect.mRight = rect.mLeft + client_width;
+        mEmojiGrid->setRect(rect);
+    }
+
+    LLPanel::Params row_panel_params;
+    row_panel_params.rect = LLRect(0, icon_size, row_width, 0);
+
+    LLScrollingPanelList::Params row_list_params;
+    row_list_params.rect = row_panel_params.rect;
+    row_list_params.is_horizontal = TRUE;
+    row_list_params.padding = 0;
+    row_list_params.spacing = icon_spacing;
+
+    LLPanel::Params icon_params;
+    LLRect icon_rect(0, icon_size, icon_size, 0);
+
+    static LLColor4 default_color(0.75f, 0.75f, 0.75f, 1.0f);
+    LLColor4 bg_color = LLUIColorTable::instance().getColor("MenuItemHighlightBgColor", default_color);
+
+    if (!mSelectedGroupIndex)
+    {
+        // List all groups
+        for (const auto& group : mFilteredEmojis)
+        {
+            // List all categories in the group
+            for (const auto& category : group)
+            {
+                // List all emojis in the category
+                fillEmojisCategory(category.second, category.first, row_panel_params,
+                    row_list_params, icon_params, icon_rect, max_icons, bg_color);
+            }
+        }
+    }
+    else
+    {
+        // List all categories in the selected group
+        const auto& group = mFilteredEmojis[mSelectedGroupIndex - 1];
+        for (const auto& category : group)
+        {
+            // List all emojis in the category
+            fillEmojisCategory(category.second, category.first, row_panel_params,
+                row_list_params, icon_params, icon_rect, max_icons, bg_color);
+        }
+    }
+
+    if (mEmojiGrid->getPanelList().empty())
+    {
+        showPreview(false);
+        mFocusedIconRow = -1;
+        mFocusedIconCol = -1;
+        if (!mHint.empty())
+        {
+            hideFloater();
+        }
+    }
+    else
+    {
+        showPreview(true);
+        mFocusedIconRow = 0;
+        mFocusedIconCol = 0;
+        moveFocusedIconNext();
+    }
+}
+
+void LLFloaterEmojiPicker::fillEmojisCategory(const std::vector<LLEmojiSearchResult>& emojis,
+    const std::string& category, const LLPanel::Params& row_panel_params, const LLUICtrl::Params& row_list_params,
+    const LLPanel::Params& icon_params, const LLRect& icon_rect, S32 max_icons, const LLColor4& bg)
+{
+    // Place the category title
+    std::string title =
+        category == RECENTLY_USED_CATEGORY ? getString("title_for_recently_used") :
+        category == FREQUENTLY_USED_CATEGORY ? getString("title_for_frequently_used") :
+        isupper(category.front()) ? category : LLStringUtil::capitalize(category);
+    LLEmojiGridDivider* div = new LLEmojiGridDivider(row_panel_params, title);
+    mEmojiGrid->addPanel(div, true);
+
+    int icon_index = 0;
+    LLEmojiGridRow* row = nullptr;
+
+    if (mFilterPattern.empty())
+    {
+        const LLEmojiDictionary::emoji2descr_map_t& emoji2descr = LLEmojiDictionary::instance().getEmoji2Descr();
+        LLEmojiSearchResult emoji { 0, "", 0, 0 };
+        if (category == RECENTLY_USED_CATEGORY)
+        {
+            for (llwchar code : sRecentlyUsed)
+            {
+                const LLEmojiDictionary::emoji2descr_map_t::const_iterator& e2d = emoji2descr.find(code);
+                if (e2d != emoji2descr.end() && !e2d->second->ShortCodes.empty())
+                {
+                    emoji.Character = code;
+                    emoji.String = e2d->second->ShortCodes.front();
+                    createEmojiIcon(emoji, category, row_panel_params, row_list_params, icon_params,
+                        icon_rect, max_icons, bg, row, icon_index);
+                }
+            }
+        }
+        else if (category == FREQUENTLY_USED_CATEGORY)
+        {
+            for (const auto& code : sFrequentlyUsed)
+            {
+                const LLEmojiDictionary::emoji2descr_map_t::const_iterator& e2d = emoji2descr.find(code.first);
+                if (e2d != emoji2descr.end() && !e2d->second->ShortCodes.empty())
+                {
+                    emoji.Character = code.first;
+                    emoji.String = e2d->second->ShortCodes.front();
+                    createEmojiIcon(emoji, category, row_panel_params, row_list_params, icon_params,
+                        icon_rect, max_icons, bg, row, icon_index);
+                }
+            }
+        }
+        else
+        {
+            const LLEmojiDictionary::cat2descrs_map_t& category2Descr = LLEmojiDictionary::instance().getCategory2Descrs();
+            const LLEmojiDictionary::cat2descrs_map_t::const_iterator& c2d = category2Descr.find(category);
+            if (c2d != category2Descr.end())
+            {
+                for (const LLEmojiDescriptor* descr : c2d->second)
+                {
+                    emoji.Character = descr->Character;
+                    emoji.String = descr->ShortCodes.front();
+                    createEmojiIcon(emoji, category, row_panel_params, row_list_params, icon_params,
+                        icon_rect, max_icons, bg, row, icon_index);
+                }
+            }
+        }
+    }
+    else
+    {
+        for (const LLEmojiSearchResult& emoji : emojis)
+        {
+            createEmojiIcon(emoji, category, row_panel_params, row_list_params, icon_params,
+                icon_rect, max_icons, bg, row, icon_index);
+        }
+    }
+}
+
+void LLFloaterEmojiPicker::createEmojiIcon(const LLEmojiSearchResult& emoji,
+    const std::string& category, const LLPanel::Params& row_panel_params, const LLUICtrl::Params& row_list_params,
+    const LLPanel::Params& icon_params, const LLRect& icon_rect, S32 max_icons, const LLColor4& bg,
+    LLEmojiGridRow*& row, int& icon_index)
+{
+    // Place a new row each (max_icons) icons
+    if (!(icon_index % max_icons))
+    {
+        row = new LLEmojiGridRow(row_panel_params, *(const LLScrollingPanelList::Params*)&row_list_params);
+        mEmojiGrid->addPanel(row, true);
+    }
+
+    // Place a new icon to the current row
+    LLEmojiGridIcon* icon = new LLEmojiGridIcon(icon_params, emoji);
+    icon->setMouseEnterCallback([this](LLUICtrl* ctrl, const LLSD&) { onEmojiMouseEnter(ctrl); });
+    icon->setMouseLeaveCallback([this](LLUICtrl* ctrl, const LLSD&) { onEmojiMouseLeave(ctrl); });
+    icon->setMouseDownCallback([this](LLUICtrl* ctrl, S32, S32, MASK) { onEmojiMouseDown(ctrl); });
+    icon->setMouseUpCallback([this](LLUICtrl* ctrl, S32, S32, MASK) { onEmojiMouseUp(ctrl); });
+    icon->setBackgroundColor(bg);
+    icon->setBackgroundOpaque(1);
+    icon->setRect(icon_rect);
+    row->mList->addPanel(icon, true);
+
+    icon_index++;
+}
+
+void LLFloaterEmojiPicker::showPreview(bool show)
+{
+    //mPreview->setIcon(nullptr);
+    mDummy->setVisible(show ? FALSE : TRUE);
+    mPreview->setVisible(show ? TRUE : FALSE);
+}
+
+void LLFloaterEmojiPicker::onGroupButtonClick(LLUICtrl* ctrl)
+{
+    if (LLButton* button = dynamic_cast<LLButton*>(ctrl))
+    {
+        if (button == mGroupButtons[mSelectedGroupIndex] || button->getToggleState())
+            return;
+
+        auto it = std::find(mGroupButtons.begin(), mGroupButtons.end(), button);
+        if (it == mGroupButtons.end())
+            return;
+
+        selectEmojiGroup(it - mGroupButtons.begin());
+    }
+}
+
+void LLFloaterEmojiPicker::onGroupButtonMouseEnter(LLUICtrl* ctrl)
+{
+    if (LLButton* button = dynamic_cast<LLButton*>(ctrl))
+    {
+        button->setUseFontColor(TRUE);
+    }
+}
+
+void LLFloaterEmojiPicker::onGroupButtonMouseLeave(LLUICtrl* ctrl)
+{
+    if (LLButton* button = dynamic_cast<LLButton*>(ctrl))
+    {
+        button->setUseFontColor(button->getToggleState());
+    }
+}
+
+void LLFloaterEmojiPicker::onEmojiMouseEnter(LLUICtrl* ctrl)
+{
+    if (LLEmojiGridIcon* icon = dynamic_cast<LLEmojiGridIcon*>(ctrl))
+    {
+        if (mFocusedIcon && mFocusedIcon != icon && mFocusedIcon->isBackgroundVisible())
+        {
+            unselectGridIcon(mFocusedIcon);
+        }
+
+        if (mHoveredIcon && mHoveredIcon != icon)
+        {
+            unselectGridIcon(mHoveredIcon);
+        }
+
+        selectGridIcon(icon);
+
+        mHoveredIcon = icon;
+    }
+}
+
+void LLFloaterEmojiPicker::onEmojiMouseLeave(LLUICtrl* ctrl)
+{
+    if (LLEmojiGridIcon* icon = dynamic_cast<LLEmojiGridIcon*>(ctrl))
+    {
+        if (icon == mHoveredIcon)
+        {
+            if (icon != mFocusedIcon)
+            {
+                unselectGridIcon(icon);
+            }
+            mHoveredIcon = nullptr;
+        }
+
+        if (!mHoveredIcon && mFocusedIcon && !mFocusedIcon->isBackgroundVisible())
+        {
+            selectGridIcon(mFocusedIcon);
+        }
+    }
+}
+
+void LLFloaterEmojiPicker::onEmojiMouseDown(LLUICtrl* ctrl)
+{
+    if (getSoundFlags() & MOUSE_DOWN)
+    {
+        make_ui_sound("UISndClick");
+    }
+}
+
+void LLFloaterEmojiPicker::onEmojiMouseUp(LLUICtrl* ctrl)
+{
+    if (getSoundFlags() & MOUSE_UP)
+    {
+        make_ui_sound("UISndClickRelease");
+    }
+
+    if (LLEmojiGridIcon* icon = dynamic_cast<LLEmojiGridIcon*>(ctrl))
+    {
+        LLSD value(wstring_to_utf8str(icon->getText()));
+        setValue(value);
+
+        onCommit();
+
+        if (!mHint.empty() || !(gKeyboard->currentMask(TRUE) & MASK_SHIFT))
+        {
+            hideFloater();
+        }
+    }
+}
+
+void LLFloaterEmojiPicker::selectFocusedIcon()
+{
+    if (mFocusedIcon && mFocusedIcon != mHoveredIcon)
+    {
+        unselectGridIcon(mFocusedIcon);
+    }
+
+    // Both mFocusedIconRow and mFocusedIconCol should be already verified
+    LLEmojiGridRow* row = dynamic_cast<LLEmojiGridRow*>(mEmojiGrid->getPanelList()[mFocusedIconRow]);
+    mFocusedIcon = row ? dynamic_cast<LLEmojiGridIcon*>(row->mList->getPanelList()[mFocusedIconCol]) : nullptr;
+
+    if (mFocusedIcon && !mHoveredIcon)
+    {
+        selectGridIcon(mFocusedIcon);
+    }
+}
+
+bool LLFloaterEmojiPicker::moveFocusedIconUp()
+{
+    for (S32 i = mFocusedIconRow - 1; i >= 0; --i)
+    {
+        LLScrollingPanel* panel = mEmojiGrid->getPanelList()[i];
+        LLEmojiGridRow* row = dynamic_cast<LLEmojiGridRow*>(panel);
+        if (row && row->mList->getPanelList().size() > mFocusedIconCol)
+        {
+            mEmojiScroll->scrollToShowRect(row->getBoundingRect());
+            mFocusedIconRow = i;
+            selectFocusedIcon();
+            return true;
+        }
+    }
+
+    return false;
+}
+
+bool LLFloaterEmojiPicker::moveFocusedIconDown()
+{
+    S32 rowCount = mEmojiGrid->getPanelList().size();
+    for (S32 i = mFocusedIconRow + 1; i < rowCount; ++i)
+    {
+        LLScrollingPanel* panel = mEmojiGrid->getPanelList()[i];
+        LLEmojiGridRow* row = dynamic_cast<LLEmojiGridRow*>(panel);
+        if (row && row->mList->getPanelList().size() > mFocusedIconCol)
+        {
+            mEmojiScroll->scrollToShowRect(row->getBoundingRect());
+            mFocusedIconRow = i;
+            selectFocusedIcon();
+            return true;
+        }
+    }
+
+    return false;
+}
+
+bool LLFloaterEmojiPicker::moveFocusedIconPrev()
+{
+    if (mHoveredIcon)
+        return false;
+
+    if (mFocusedIconCol > 0)
+    {
+        mFocusedIconCol--;
+        selectFocusedIcon();
+        return true;
+    }
+
+    for (S32 i = mFocusedIconRow - 1; i >= 0; --i)
+    {
+        LLScrollingPanel* panel = mEmojiGrid->getPanelList()[i];
+        LLEmojiGridRow* row = dynamic_cast<LLEmojiGridRow*>(panel);
+        if (row && row->mList->getPanelList().size())
+        {
+            mEmojiScroll->scrollToShowRect(row->getBoundingRect());
+            mFocusedIconCol = row->mList->getPanelList().size() - 1;
+            mFocusedIconRow = i;
+            selectFocusedIcon();
+            return true;
+        }
+    }
+
+    return false;
+}
+
+bool LLFloaterEmojiPicker::moveFocusedIconNext()
+{
+    if (mHoveredIcon)
+        return false;
+
+    LLScrollingPanel* panel = mEmojiGrid->getPanelList()[mFocusedIconRow];
+    LLEmojiGridRow* row = dynamic_cast<LLEmojiGridRow*>(panel);
+    S32 colCount = row ? row->mList->getPanelList().size() : 0;
+    if (mFocusedIconCol < colCount - 1)
+    {
+        mFocusedIconCol++;
+        selectFocusedIcon();
+        return true;
+    }
+
+    S32 rowCount = mEmojiGrid->getPanelList().size();
+    for (S32 i = mFocusedIconRow + 1; i < rowCount; ++i)
+    {
+        LLScrollingPanel* panel = mEmojiGrid->getPanelList()[i];
+        LLEmojiGridRow* row = dynamic_cast<LLEmojiGridRow*>(panel);
+        if (row && row->mList->getPanelList().size())
+        {
+            mEmojiScroll->scrollToShowRect(row->getBoundingRect());
+            mFocusedIconCol = 0;
+            mFocusedIconRow = i;
+            selectFocusedIcon();
+            return true;
+        }
+    }
+
+    return false;
+}
+
+void LLFloaterEmojiPicker::selectGridIcon(LLEmojiGridIcon* icon)
+{
+    icon->setBackgroundVisible(TRUE);
+    mPreview->setIcon(icon);
+}
+
+void LLFloaterEmojiPicker::unselectGridIcon(LLEmojiGridIcon* icon)
+{
+    icon->setBackgroundVisible(FALSE);
+    mPreview->setIcon(nullptr);
+}
+
+// virtual
+BOOL LLFloaterEmojiPicker::handleKey(KEY key, MASK mask, BOOL called_from_parent)
+{
+    if (mask == MASK_NONE)
+    {
+        switch (key)
+        {
+        case KEY_UP:
+            moveFocusedIconUp();
+            return TRUE;
+        case KEY_DOWN:
+            moveFocusedIconDown();
+            return TRUE;
+        case KEY_LEFT:
+            moveFocusedIconPrev();
+            return TRUE;
+        case KEY_RIGHT:
+            moveFocusedIconNext();
+            return TRUE;
+        case KEY_ESCAPE:
+            hideFloater();
+            return TRUE;
+        }
+    }
+
+    if (mask == MASK_ALT)
+    {
+        switch (key)
+        {
+        case KEY_LEFT:
+            selectEmojiGroup((mSelectedGroupIndex + mFilteredEmojis.size()) % mGroupButtons.size());
+            return TRUE;
+        case KEY_RIGHT:
+            selectEmojiGroup((mSelectedGroupIndex + 1) % mGroupButtons.size());
+            return TRUE;
+        }
+    }
+
+    if (key == KEY_RETURN)
+    {
+        U64 time = totalTime();
+        // <Shift+Return> comes twice for unknown reason
+        if (mFocusedIcon && (time - mRecentReturnPressedMs > 100000)) // Min interval 0.1 sec.
+        {
+            onEmojiMouseDown(mFocusedIcon);
+            onEmojiMouseUp(mFocusedIcon);
+        }
+        mRecentReturnPressedMs = time;
+        return TRUE;
+    }
+
+    if (mHint.empty())
+    {
+        if (key >= 0x20 && key < 0x80)
+        {
+            if (!mEmojiGrid->getPanelList().empty())
+            {
+                if (mFilterPattern.empty())
+                {
+                    mFilterPattern = ":";
+                }
+                mFilterPattern += (char)key;
+                initialize();
+            }
+            return TRUE;
+        }
+        else if (key == KEY_BACKSPACE)
+        {
+            if (!mFilterPattern.empty())
+            {
+                mFilterPattern.pop_back();
+                if (mFilterPattern == ":")
+                {
+                    mFilterPattern.clear();
+                }
+                initialize();
+            }
+            return TRUE;
+        }
+    }
+
+    return super::handleKey(key, mask, called_from_parent);
+}
+
+// virtual
+void LLFloaterEmojiPicker::goneFromFront()
+{
+    hideFloater();
+}
+
+void LLFloaterEmojiPicker::hideFloater() const
+{
+    LLEmojiHelper::instance().hideHelper(nullptr, true);
+}
+
+// static
+std::list<llwchar>& LLFloaterEmojiPicker::getRecentlyUsed()
+{
+    loadState();
+    return sRecentlyUsed;
+}
+
+// static
+void LLFloaterEmojiPicker::onEmojiUsed(llwchar emoji)
+{
+    // Update sRecentlyUsed
+    auto itr = std::find(sRecentlyUsed.begin(), sRecentlyUsed.end(), emoji);
+    if (itr == sRecentlyUsed.end())
+    {
+        sRecentlyUsed.push_front(emoji);
+    }
+    else if (itr != sRecentlyUsed.begin())
+    {
+        sRecentlyUsed.erase(itr);
+        sRecentlyUsed.push_front(emoji);
+    }
+
+    // Increment and reorder sFrequentlyUsed
+    auto itf = sFrequentlyUsed.begin();
+    while (itf != sFrequentlyUsed.end())
+    {
+        if (itf->first == emoji)
+        {
+            itf->second++;
+            while (itf != sFrequentlyUsed.begin())
+            {
+                auto prior = itf;
+                prior--;
+                if (prior->second > itf->second)
+                    break;
+                prior->swap(*itf);
+                itf = prior;
+            }
+            break;
+        }
+        itf++;
+    }
+    // Append new if not found
+    if (itf == sFrequentlyUsed.end())
+    {
+        // Insert before others with count == 1
+        while (itf != sFrequentlyUsed.begin())
+        {
+            auto prior = itf;
+            prior--;
+            if (prior->second > 1)
+                break;
+            itf = prior;
+        }
+        sFrequentlyUsed.insert(itf, std::make_pair(emoji, 1));
+    }
+}
+
+// static
+void LLFloaterEmojiPicker::loadState()
+{
+    if (!sStateFileName.empty())
+        return; // Already loaded
+
+    sStateFileName = gDirUtilp->getExpandedFilename(LL_PATH_PER_SL_ACCOUNT, "emoji_floater_state.xml");
+
+    llifstream file;
+    file.open(sStateFileName.c_str());
+    if (!file.is_open())
+    {
+        LL_WARNS() << "Emoji floater state file is missing or inaccessible: " << sStateFileName << LL_ENDL;
+        return;
+    }
+
+    LLSD state;
+    LLSDSerialize::fromXML(state, file);
+    if (state.isUndefined())
+    {
+        LL_WARNS() << "Emoji floater state file is missing or ill-formed: " << sStateFileName << LL_ENDL;
+        return;
+    }
+
+    // Load and parse sRecentlyUsed
+    std::string recentlyUsed = state[sKeyRecentlyUsed];
+    std::vector<std::string> rtokens = LLStringUtil::getTokens(recentlyUsed, ",");
+    int maxCountR = 20;
+    for (const std::string& token : rtokens)
+    {
+        llwchar emoji = (llwchar)atoi(token.c_str());
+        if (std::find(sRecentlyUsed.begin(), sRecentlyUsed.end(), emoji) == sRecentlyUsed.end())
+        {
+            sRecentlyUsed.push_back(emoji);
+            if (!--maxCountR)
+                break;
+        }
+    }
+
+    // Load and parse sFrequentlyUsed
+    std::string frequentlyUsed = state[sKeyFrequentlyUsed];
+    std::vector<std::string> ftokens = LLStringUtil::getTokens(frequentlyUsed, ",");
+    int maxCountF = 20;
+    for (const std::string& token : ftokens)
+    {
+        std::vector<std::string> pair = LLStringUtil::getTokens(token, ":");
+        if (pair.size() == 2)
+        {
+            llwchar emoji = (llwchar)atoi(pair[0].c_str());
+            if (emoji)
+            {
+                U32 count = atoi(pair[1].c_str());
+                auto it = std::find_if(sFrequentlyUsed.begin(), sFrequentlyUsed.end(),
+                    [emoji](std::pair<llwchar, U32>& it) { return it.first == emoji; });
+                if (it != sFrequentlyUsed.end())
+                {
+                    it->second += count;
+                }
+                else
+                {
+                    sFrequentlyUsed.push_back(std::make_pair(emoji, count));
+                    if (!--maxCountF)
+                        break;
+                }
+            }
+        }
+    }
+
+    // Normalize by minimum
+    if (!sFrequentlyUsed.empty())
+    {
+        U32 delta = sFrequentlyUsed.back().second - 1;
+        for (auto& it : sFrequentlyUsed)
+        {
+            it.second = std::max((U32)0, it.second - delta);
+        }
+    }
+}
+
+// static
+void LLFloaterEmojiPicker::saveState()
+{
+    if (sStateFileName.empty())
+        return; // Not loaded
+
+    if (LLAppViewer::instance()->isSecondInstance())
+        return; // Not allowed
+
+    LLSD state = LLSD::emptyMap();
+
+    if (!sRecentlyUsed.empty())
+    {
+        U32 maxCount = 20;
+        std::string recentlyUsed;
+        for (llwchar emoji : sRecentlyUsed)
+        {
+            if (!recentlyUsed.empty())
+                recentlyUsed += ",";
+            char buffer[32];
+            sprintf(buffer, "%u", (U32)emoji);
+            recentlyUsed += buffer;
+            if (!--maxCount)
+                break;
+        }
+        state[sKeyRecentlyUsed] = recentlyUsed;
+    }
+
+    if (!sFrequentlyUsed.empty())
+    {
+        U32 maxCount = 20;
+        std::string frequentlyUsed;
+        for (auto& it : sFrequentlyUsed)
+        {
+            if (!frequentlyUsed.empty())
+                frequentlyUsed += ",";
+            char buffer[32];
+            sprintf(buffer, "%u:%u", (U32)it.first, (U32)it.second);
+            frequentlyUsed += buffer;
+            if (!--maxCount)
+                break;
+        }
+        state[sKeyFrequentlyUsed] = frequentlyUsed;
+    }
+
+    llofstream stream(sStateFileName.c_str());
+    LLSDSerialize::toPrettyXML(state, stream);
+}