/**
 * @file lloutfitgallery.cpp
 * @author Pavlo Kryvych
 * @brief Visual gallery of agent's outfits for My Appearance side panel
 *
 * $LicenseInfo:firstyear=2015&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2015, 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" // must be first include
#include "lloutfitgallery.h"

// llcommon
#include "llcommonutils.h"
#include "llfilesystem.h"

#include "llaccordionctrltab.h"
#include "llappearancemgr.h"
#include "llerror.h"
#include "llfilepicker.h"
#include "llfloaterperms.h"
#include "llfloaterreg.h"
#include "llfloatersimplesnapshot.h"
#include "llimagedimensionsinfo.h"
#include "llinventoryfunctions.h"
#include "llinventorymodel.h"
#include "lllocalbitmaps.h"
#include "llnotificationsutil.h"
#include "llpaneloutfitsinventory.h"
#include "lltabcontainer.h"
#include "lltexturectrl.h"
#include "lltrans.h"
#include "llviewercontrol.h"
#include "llviewermenufile.h"
#include "llviewertexturelist.h"
#include "llwearableitemslist.h"

static LLPanelInjector<LLOutfitGallery> t_outfit_gallery("outfit_gallery");

#define MAX_OUTFIT_PHOTO_WIDTH 256
#define MAX_OUTFIT_PHOTO_HEIGHT 256

const S32 GALLERY_ITEMS_PER_ROW_MIN = 2;

LLOutfitGallery::LLOutfitGallery(const LLOutfitGallery::Params& p)
    : LLOutfitListBase(),
      mOutfitsObserver(NULL),
      mScrollPanel(NULL),
      mGalleryPanel(NULL),
      mLastRowPanel(NULL),
      mGalleryCreated(false),
      mRowCount(0),
      mItemsAddedCount(0),
      mOutfitLinkPending(NULL),
      mOutfitRenamePending(NULL),
      mSnapshotFolderID(NULL),
      mRowPanelHeight(p.row_panel_height),
      mVerticalGap(p.vertical_gap),
      mHorizontalGap(p.horizontal_gap),
      mItemWidth(p.item_width),
      mItemHeight(p.item_height),
      mItemHorizontalGap(p.item_horizontal_gap),
      mItemsInRow(p.items_in_row),
      mRowPanWidthFactor(p.row_panel_width_factor),
      mGalleryWidthFactor(p.gallery_width_factor),
      mTextureSelected(NULL)
{
    updateGalleryWidth();
}

LLOutfitGallery::Params::Params()
    : row_panel_height("row_panel_height", 180),
      vertical_gap("vertical_gap", 10),
      horizontal_gap("horizontal_gap", 10),
      item_width("item_width", 150),
      item_height("item_height", 175),
      item_horizontal_gap("item_horizontal_gap", 16),
      items_in_row("items_in_row", GALLERY_ITEMS_PER_ROW_MIN),
      row_panel_width_factor("row_panel_width_factor", 166),
      gallery_width_factor("gallery_width_factor", 163)
{
    addSynonym(row_panel_height, "row_height");
}

const LLOutfitGallery::Params& LLOutfitGallery::getDefaultParams()
{
    return LLUICtrlFactory::getDefaultParams<LLOutfitGallery>();
}

bool LLOutfitGallery::postBuild()
{
    bool rv = LLOutfitListBase::postBuild();
    mScrollPanel = getChild<LLScrollContainer>("gallery_scroll_panel");
    LLPanel::Params params = LLPanel::getDefaultParams(); // Don't parse XML when creating dummy LLPanel
    mGalleryPanel = LLUICtrlFactory::create<LLPanel>(params);
    mMessageTextBox = getChild<LLTextBox>("no_outfits_txt");
    mOutfitGalleryMenu = new LLOutfitGalleryContextMenu(this);
    return rv;
}

void LLOutfitGallery::onOpen(const LLSD& info)
{
    LLOutfitListBase::onOpen(info);
    if (!mGalleryCreated)
    {
        uuid_vec_t cats;
        getCurrentCategories(cats);
        int n = cats.size();
        buildGalleryPanel(n);
        mScrollPanel->addChild(mGalleryPanel);
        for (int i = 0; i < n; i++)
        {
            addToGallery(mOutfitMap[cats[i]]);
        }
        reArrangeRows();
        mGalleryCreated = true;
    }
}

void LLOutfitGallery::draw()
{
    LLPanel::draw();
    if (mGalleryCreated)
    {
        updateRowsIfNeeded();
    }
}

bool LLOutfitGallery::handleKeyHere(KEY key, MASK mask)
{
    bool handled = false;
    switch (key)
    {
        case KEY_RETURN:
            // Open selected items if enter key hit on the inventory panel
            if (mask == MASK_NONE && mSelectedOutfitUUID.notNull())
            {
                // Or should it wearSelectedOutfit?
                getSelectedItem()->openOutfitsContent();
            }
            handled = true;
            break;
        case KEY_DELETE:
#if LL_DARWIN
        case KEY_BACKSPACE:
#endif
            // Delete selected items if delete or backspace key hit on the inventory panel
            // Note: on Mac laptop keyboards, backspace and delete are one and the same
            if (mSelectedOutfitUUID.notNull())
            {
                onRemoveOutfit(mSelectedOutfitUUID);
            }
            handled = true;
            break;

        case KEY_F2:
            LLAppearanceMgr::instance().renameOutfit(mSelectedOutfitUUID);
            handled = true;
            break;

        case KEY_PAGE_UP:
            if (mScrollPanel)
            {
                mScrollPanel->pageUp(30);
            }
            handled = true;
            break;

        case KEY_PAGE_DOWN:
            if (mScrollPanel)
            {
                mScrollPanel->pageDown(30);
            }
            handled = true;
            break;

        case KEY_HOME:
            if (mScrollPanel)
            {
                mScrollPanel->goToTop();
            }
            handled = true;
            break;

        case KEY_END:
            if (mScrollPanel)
            {
                mScrollPanel->goToBottom();
            }
            handled = true;
            break;

        case KEY_LEFT:
            moveLeft();
            handled = true;
            break;

        case KEY_RIGHT:
            moveRight();
            handled = true;
            break;

        case KEY_UP:
            moveUp();
            handled = true;
            break;

        case KEY_DOWN:
            moveDown();
            handled = true;
            break;

        default:
            break;
    }

    if (handled)
    {
        mOutfitGalleryMenu->hide();
    }

    return handled;
}

void LLOutfitGallery::moveUp()
{
    if (mSelectedOutfitUUID.notNull() && mItemsAddedCount > 1)
    {
        LLOutfitGalleryItem* item = getSelectedItem();
        if (item)
        {
            S32 n = mItemIndexMap[item];
            n -= mItemsInRow;
            if (n >= 0)
            {
                item = mIndexToItemMap[n];
                LLUUID item_id = item->getUUID();
                ChangeOutfitSelection(nullptr, item_id);
                item->setFocus(true);

                scrollToShowItem(mSelectedOutfitUUID);
            }
        }
    }
}

void LLOutfitGallery::moveDown()
{
    if (mSelectedOutfitUUID.notNull() && mItemsAddedCount > 1)
    {
        LLOutfitGalleryItem* item = getSelectedItem();
        if (item)
        {
            S32 n = mItemIndexMap[item];
            n += mItemsInRow;
            if (n < mItemsAddedCount)
            {
                item = mIndexToItemMap[n];
                LLUUID item_id = item->getUUID();
                ChangeOutfitSelection(nullptr, item_id);
                item->setFocus(true);

                scrollToShowItem(mSelectedOutfitUUID);
            }
        }
    }
}

void LLOutfitGallery::moveLeft()
{
    if (mSelectedOutfitUUID.notNull() && mItemsAddedCount > 1)
    {
        LLOutfitGalleryItem* item = getSelectedItem();
        if (item)
        {
            // Might be better to get item from panel
            S32 n = mItemIndexMap[item];
            n--;
            if (n < 0)
            {
                n = mItemsAddedCount - 1;
            }
            item = mIndexToItemMap[n];
            LLUUID item_id = item->getUUID();
            ChangeOutfitSelection(nullptr, item_id);
            item->setFocus(true);

            scrollToShowItem(mSelectedOutfitUUID);
        }
    }
}

void LLOutfitGallery::moveRight()
{
    if (mSelectedOutfitUUID.notNull() && mItemsAddedCount > 1)
    {
        LLOutfitGalleryItem* item = getSelectedItem();
        if (item)
        {
            S32 n = mItemIndexMap[item];
            n++;
            if (n == mItemsAddedCount)
            {
                n = 0;
            }
            item = mIndexToItemMap[n];
            LLUUID item_id = item->getUUID();
            ChangeOutfitSelection(nullptr, item_id);
            item->setFocus(true);

            scrollToShowItem(mSelectedOutfitUUID);
        }
    }
}

void LLOutfitGallery::onFocusLost()
{
    LLOutfitListBase::onFocusLost();

    if (mSelectedOutfitUUID.notNull())
    {
        LLOutfitGalleryItem* item = getSelectedItem();
        if (item)
        {
            item->setSelected(false);
        }
    }
}

void LLOutfitGallery::onFocusReceived()
{
    LLOutfitListBase::onFocusReceived();

    if (mSelectedOutfitUUID.notNull())
    {
        LLOutfitGalleryItem* item = getSelectedItem();
        if (item)
        {
            item->setSelected(true);
        }
    }
}

void LLOutfitGallery::onRemoveOutfit(const LLUUID& outfit_cat_id)
{
    LLNotificationsUtil::add("DeleteOutfits", LLSD(), LLSD(), boost::bind(onOutfitsRemovalConfirmation, _1, _2, outfit_cat_id));
}

void LLOutfitGallery::onOutfitsRemovalConfirmation(const LLSD& notification, const LLSD& response, const LLUUID& outfit_cat_id)
{
    S32 option = LLNotificationsUtil::getSelectedOption(notification, response);
    if (option != 0) return; // canceled

    if (outfit_cat_id.notNull())
    {
        gInventory.removeCategory(outfit_cat_id);
    }
}

void LLOutfitGallery::scrollToShowItem(const LLUUID& item_id)
{
    LLOutfitGalleryItem* item = mOutfitMap[item_id];
    if (item)
    {
        const LLRect visible_content_rect = mScrollPanel->getVisibleContentRect();

        LLRect item_rect;
        item->localRectToOtherView(item->getLocalRect(), &item_rect, mScrollPanel);
        LLRect overlap_rect(item_rect);
        overlap_rect.intersectWith(visible_content_rect);

        //Scroll when the selected item is outside the visible area
        if (overlap_rect.getHeight() + 5 < item->getRect().getHeight())
        {
            LLRect content_rect = mScrollPanel->getContentWindowRect();
            LLRect constraint_rect;
            constraint_rect.setOriginAndSize(0, 0, content_rect.getWidth(), content_rect.getHeight());

            LLRect item_doc_rect;
            item->localRectToOtherView(item->getLocalRect(), &item_doc_rect, mGalleryPanel);

            mScrollPanel->scrollToShowRect(item_doc_rect, constraint_rect);
        }
    }
}

void LLOutfitGallery::updateRowsIfNeeded()
{
    if(((getRect().getWidth() - mRowPanelWidth) > mItemWidth) && mRowCount > 1)
    {
        reArrangeRows(1);
    }
    else if((mRowPanelWidth > (getRect().getWidth() + mItemHorizontalGap)) && mItemsInRow > GALLERY_ITEMS_PER_ROW_MIN)
    {
        reArrangeRows(-1);
    }
}

bool compareGalleryItem(LLOutfitGalleryItem* item1, LLOutfitGalleryItem* item2)
{
    if(gSavedSettings.getBOOL("OutfitGallerySortByName") ||
            ((item1->isDefaultImage() && item2->isDefaultImage()) || (!item1->isDefaultImage() && !item2->isDefaultImage())))
    {
        std::string name1 = item1->getItemName();
        std::string name2 = item2->getItemName();

        return (LLStringUtil::compareDict(name1, name2) < 0);
    }
    else
    {
        return item2->isDefaultImage();
    }
}

void LLOutfitGallery::reArrangeRows(S32 row_diff)
{
    std::vector<LLOutfitGalleryItem*> buf_items = mItems;
    for (std::vector<LLOutfitGalleryItem*>::const_reverse_iterator it = buf_items.rbegin(); it != buf_items.rend(); ++it)
    {
        removeFromGalleryLast(*it);
    }
    for (std::vector<LLOutfitGalleryItem*>::const_reverse_iterator it = mHiddenItems.rbegin(); it != mHiddenItems.rend(); ++it)
    {
        buf_items.push_back(*it);
    }
    mHiddenItems.clear();

    mItemsInRow += row_diff;
    updateGalleryWidth();
    std::sort(buf_items.begin(), buf_items.end(), compareGalleryItem);

    std::string cur_filter = getFilterSubString();
    LLStringUtil::toUpper(cur_filter);

    for (std::vector<LLOutfitGalleryItem*>::const_iterator it = buf_items.begin(); it != buf_items.end(); ++it)
    {
        std::string outfit_name = (*it)->getItemName();
        LLStringUtil::toUpper(outfit_name);

        bool hidden = (std::string::npos == outfit_name.find(cur_filter));
        (*it)->setHidden(hidden);

        addToGallery(*it);
    }

    updateMessageVisibility();
}

void LLOutfitGallery::updateGalleryWidth()
{
    mRowPanelWidth = mRowPanWidthFactor * mItemsInRow - mItemHorizontalGap;
    mGalleryWidth = mGalleryWidthFactor * mItemsInRow - mItemHorizontalGap;
}

LLPanel* LLOutfitGallery::addLastRow()
{
    mRowCount++;
    int row = 0;
    int vgap = mVerticalGap * row;
    LLPanel* result = buildRowPanel(0, row * mRowPanelHeight + vgap);
    mGalleryPanel->addChild(result);
    return result;
}

void LLOutfitGallery::moveRowUp(int row)
{
    moveRow(row, mRowCount - 1 - row + 1);
}

void LLOutfitGallery::moveRowDown(int row)
{
    moveRow(row, mRowCount - 1 - row - 1);
}

void LLOutfitGallery::moveRow(int row, int pos)
{
    int vgap = mVerticalGap * pos;
    moveRowPanel(mRowPanels[row], 0, pos * mRowPanelHeight + vgap);
}

void LLOutfitGallery::removeLastRow()
{
    mRowCount--;
    mGalleryPanel->removeChild(mLastRowPanel);
    mUnusedRowPanels.push_back(mLastRowPanel);
    mRowPanels.pop_back();
    if (mRowPanels.size() > 0)
    {
        // Just removed last row
        mLastRowPanel = mRowPanels.back();
    }
    else
    {
        mLastRowPanel = NULL;
    }
}

LLPanel* LLOutfitGallery::addToRow(LLPanel* row_stack, LLOutfitGalleryItem* item, int pos, int hgap)
{
    LLPanel* lpanel = buildItemPanel(pos * mItemWidth + hgap);
    lpanel->addChild(item);
    row_stack->addChild(lpanel);
    mItemPanels.push_back(lpanel);
    return lpanel;
}

void LLOutfitGallery::addToGallery(LLOutfitGalleryItem* item)
{
    if(item->isHidden())
    {
        mHiddenItems.push_back(item);
        return;
    }
    mItemIndexMap[item] = mItemsAddedCount;
    mIndexToItemMap[mItemsAddedCount] = item;
    mItemsAddedCount++;
    int n = mItemsAddedCount;
    int row_count = (n % mItemsInRow) == 0 ? n / mItemsInRow : n / mItemsInRow + 1;
    int n_prev = n - 1;
    int row_count_prev = (n_prev % mItemsInRow) == 0 ? n_prev / mItemsInRow : n_prev / mItemsInRow + 1;

    bool add_row = row_count != row_count_prev;
    int pos = 0;
    if (add_row)
    {
        for (int i = 0; i < row_count_prev; i++)
        {
            moveRowUp(i);
        }
        mLastRowPanel = addLastRow();
        mRowPanels.push_back(mLastRowPanel);
    }
    pos = (n - 1) % mItemsInRow;
    mItems.push_back(item);
    addToRow(mLastRowPanel, item, pos, mHorizontalGap * pos);
    reshapeGalleryPanel(row_count);
}


void LLOutfitGallery::removeFromGalleryLast(LLOutfitGalleryItem* item)
{
    if(item->isHidden())
    {
        mHiddenItems.pop_back();
        return;
    }
    int n_prev = mItemsAddedCount;
    int n = mItemsAddedCount - 1;
    int row_count = (n % mItemsInRow) == 0 ? n / mItemsInRow : n / mItemsInRow + 1;
    int row_count_prev = (n_prev % mItemsInRow) == 0 ? n_prev / mItemsInRow : n_prev / mItemsInRow + 1;
    mItemsAddedCount--;
    mIndexToItemMap.erase(mItemsAddedCount);

    bool remove_row = row_count != row_count_prev;
    removeFromLastRow(mItems[mItemsAddedCount]);
    mItems.pop_back();
    if (remove_row)
    {
        for (int i = 0; i < row_count_prev - 1; i++)
        {
            moveRowDown(i);
        }
        removeLastRow();
    }
    reshapeGalleryPanel(row_count);
}


void LLOutfitGallery::removeFromGalleryMiddle(LLOutfitGalleryItem* item)
{
    if(item->isHidden())
    {
        mHiddenItems.erase(std::remove(mHiddenItems.begin(), mHiddenItems.end(), item), mHiddenItems.end());
        return;
    }
    int n = mItemIndexMap[item];
    mItemIndexMap.erase(item);
    mIndexToItemMap.erase(n);
    std::vector<LLOutfitGalleryItem*> saved;
    for (int i = mItemsAddedCount - 1; i > n; i--)
    {
        saved.push_back(mItems[i]);
        removeFromGalleryLast(mItems[i]);
    }
    removeFromGalleryLast(mItems[n]);
    int saved_count = saved.size();
    for (int i = 0; i < saved_count; i++)
    {
        addToGallery(saved.back());
        saved.pop_back();
    }
}

void LLOutfitGallery::removeFromLastRow(LLOutfitGalleryItem* item)
{
    mItemPanels.back()->removeChild(item);
    mLastRowPanel->removeChild(mItemPanels.back());
    mUnusedItemPanels.push_back(mItemPanels.back());
    mItemPanels.pop_back();
}

LLOutfitGalleryItem* LLOutfitGallery::buildGalleryItem(std::string name, LLUUID outfit_id)
{
    LLOutfitGalleryItem::Params giparams;
    LLOutfitGalleryItem* gitem = LLUICtrlFactory::create<LLOutfitGalleryItem>(giparams);
    gitem->reshape(mItemWidth, mItemHeight);
    gitem->setVisible(true);
    gitem->setFollowsLeft();
    gitem->setFollowsTop();
    gitem->setOutfitName(name);
    gitem->setUUID(outfit_id);
    gitem->setGallery(this);
    return gitem;
}

LLOutfitGalleryItem* LLOutfitGallery::getSelectedItem()
{
    return mOutfitMap[mSelectedOutfitUUID];
}

void LLOutfitGallery::buildGalleryPanel(int row_count)
{
    LLPanel::Params params;
    mGalleryPanel = LLUICtrlFactory::create<LLPanel>(params);
    reshapeGalleryPanel(row_count);
}

void LLOutfitGallery::reshapeGalleryPanel(int row_count)
{
    int bottom = 0;
    int left = 0;
    int height = row_count * (mRowPanelHeight + mVerticalGap);
    LLRect rect = LLRect(left, bottom + height, left + mGalleryWidth, bottom);
    mGalleryPanel->setRect(rect);
    mGalleryPanel->reshape(mGalleryWidth, height);
    mGalleryPanel->setVisible(true);
    mGalleryPanel->setFollowsLeft();
    mGalleryPanel->setFollowsTop();
}

LLPanel* LLOutfitGallery::buildItemPanel(int left)
{
    LLPanel::Params lpparams;
    int top = 0;
    LLPanel* lpanel = NULL;
    if(mUnusedItemPanels.empty())
    {
        lpanel = LLUICtrlFactory::create<LLPanel>(lpparams);
    }
    else
    {
        lpanel = mUnusedItemPanels.back();
        mUnusedItemPanels.pop_back();
    }
    LLRect rect = LLRect(left, top + mItemHeight, left + mItemWidth + mItemHorizontalGap, top);
    lpanel->setRect(rect);
    lpanel->reshape(mItemWidth + mItemHorizontalGap, mItemHeight);
    lpanel->setVisible(true);
    lpanel->setFollowsLeft();
    lpanel->setFollowsTop();
    return lpanel;
}

LLPanel* LLOutfitGallery::buildRowPanel(int left, int bottom)
{
    LLPanel::Params sparams;
    LLPanel* stack = NULL;
    if(mUnusedRowPanels.empty())
    {
        stack = LLUICtrlFactory::create<LLPanel>(sparams);
    }
    else
    {
        stack = mUnusedRowPanels.back();
        mUnusedRowPanels.pop_back();
    }
    moveRowPanel(stack, left, bottom);
    return stack;
}

void LLOutfitGallery::moveRowPanel(LLPanel* stack, int left, int bottom)
{
    LLRect rect = LLRect(left, bottom + mRowPanelHeight, left + mRowPanelWidth, bottom);
    stack->setRect(rect);
    stack->reshape(mRowPanelWidth, mRowPanelHeight);
    stack->setVisible(true);
    stack->setFollowsLeft();
    stack->setFollowsTop();
}

LLOutfitGallery::~LLOutfitGallery()
{
    delete mOutfitGalleryMenu;

    if (gInventory.containsObserver(mOutfitsObserver))
    {
        gInventory.removeObserver(mOutfitsObserver);
    }
    delete mOutfitsObserver;

    while (!mUnusedRowPanels.empty())
    {
        LLPanel* panelp = mUnusedRowPanels.back();
        mUnusedRowPanels.pop_back();
        panelp->die();
    }
    while (!mUnusedItemPanels.empty())
    {
        LLPanel* panelp = mUnusedItemPanels.back();
        mUnusedItemPanels.pop_back();
        panelp->die();
    }
}

// virtual
void LLOutfitGallery::onFilterSubStringChanged(const std::string& new_string, const std::string& old_string)
{
    reArrangeRows();
}

void LLOutfitGallery::onHighlightBaseOutfit(LLUUID base_id, LLUUID prev_id)
{
    if (mOutfitMap[base_id])
    {
        mOutfitMap[base_id]->setOutfitWorn(true);
    }
    if (mOutfitMap[prev_id])
    {
        mOutfitMap[prev_id]->setOutfitWorn(false);
    }
}

void LLOutfitGallery::onSetSelectedOutfitByUUID(const LLUUID& outfit_uuid)
{
}

void LLOutfitGallery::getCurrentCategories(uuid_vec_t& vcur)
{
    for (outfit_map_t::const_iterator iter = mOutfitMap.begin();
        iter != mOutfitMap.end();
        iter++)
    {
        if ((*iter).second != NULL)
        {
            vcur.push_back((*iter).first);
        }
    }
}

void LLOutfitGallery::updateAddedCategory(LLUUID cat_id)
{
    LLViewerInventoryCategory *cat = gInventory.getCategory(cat_id);
    if (!cat) return;

    std::string name = cat->getName();
    LLOutfitGalleryItem* item = buildGalleryItem(name, cat_id);
    mOutfitMap.insert(LLOutfitGallery::outfit_map_value_t(cat_id, item));
    item->setRightMouseDownCallback(boost::bind(&LLOutfitListBase::outfitRightClickCallBack, this,
        _1, _2, _3, cat_id));
    LLWearableItemsList* list = NULL;
    item->setFocusReceivedCallback(boost::bind(&LLOutfitListBase::ChangeOutfitSelection, this, list, cat_id));
    if (mGalleryCreated)
    {
        addToGallery(item);
    }

    LLViewerInventoryCategory* outfit_category = gInventory.getCategory(cat_id);
    if (!outfit_category)
        return;

    if (mOutfitsObserver == NULL)
    {
        mOutfitsObserver = new LLInventoryCategoriesObserver();
        gInventory.addObserver(mOutfitsObserver);
    }

    // Start observing changes in "My Outfits" category.
    mOutfitsObserver->addCategory(cat_id,
        boost::bind(&LLOutfitGallery::refreshOutfit, this, cat_id), true);

    outfit_category->fetch();
    refreshOutfit(cat_id);
}

void LLOutfitGallery::updateRemovedCategory(LLUUID cat_id)
{
    outfit_map_t::iterator outfits_iter = mOutfitMap.find(cat_id);
    if (outfits_iter != mOutfitMap.end())
    {
        // 0. Remove category from observer.
        mOutfitsObserver->removeCategory(cat_id);

        //const LLUUID& outfit_id = outfits_iter->first;
        LLOutfitGalleryItem* item = outfits_iter->second;

        // An outfit is removed from the list. Do the following:
        // 2. Remove the outfit from selection.
        deselectOutfit(cat_id);

        // 3. Remove category UUID to accordion tab mapping.
        mOutfitMap.erase(outfits_iter);

        // 4. Remove outfit from gallery.
        removeFromGalleryMiddle(item);

        // kill removed item
        if (item != NULL)
        {
            item->die();
        }
    }

}

void LLOutfitGallery::updateChangedCategoryName(LLViewerInventoryCategory *cat, std::string name)
{
    outfit_map_t::iterator outfit_iter = mOutfitMap.find(cat->getUUID());
    if (outfit_iter != mOutfitMap.end())
    {
        // Update name of outfit in gallery
        LLOutfitGalleryItem* item = outfit_iter->second;
        if (item)
        {
            item->setOutfitName(name);
        }
    }
}

void LLOutfitGallery::onOutfitRightClick(LLUICtrl* ctrl, S32 x, S32 y, const LLUUID& cat_id)
{
    if (mOutfitMenu && cat_id.notNull())
    {
        uuid_vec_t selected_uuids;
        selected_uuids.push_back(cat_id);
        mOutfitGalleryMenu->show(ctrl, selected_uuids, x, y);
    }
}

void LLOutfitGallery::onChangeOutfitSelection(LLWearableItemsList* list, const LLUUID& category_id)
{
    if (mSelectedOutfitUUID == category_id)
        return;
    if (mOutfitMap[mSelectedOutfitUUID])
    {
        mOutfitMap[mSelectedOutfitUUID]->setSelected(false);
    }
    if (mOutfitMap[category_id])
    {
        mOutfitMap[category_id]->setSelected(true);
    }
    // mSelectedOutfitUUID will be set in LLOutfitListBase::ChangeOutfitSelection
}

void LLOutfitGallery::wearSelectedOutfit()
{
    LLAppearanceMgr::instance().replaceCurrentOutfit(getSelectedOutfitUUID());
}

bool LLOutfitGallery::hasItemSelected()
{
    return false;
}

bool LLOutfitGallery::canWearSelected()
{
    return false;
}

bool LLOutfitGallery::hasDefaultImage(const LLUUID& outfit_cat_id)
{
    if (mOutfitMap[outfit_cat_id])
    {
        return mOutfitMap[outfit_cat_id]->isDefaultImage();
    }
    return false;
}

void LLOutfitGallery::updateMessageVisibility()
{
    if (mItems.empty())
    {
        mMessageTextBox->setVisible(true);
        mScrollPanel->setVisible(false);
        std::string message = getString(getFilterSubString().empty() ? "no_outfits_msg" : "no_matched_outfits_msg");
        mMessageTextBox->setValue(message);
    }
    else
    {
        mScrollPanel->setVisible(true);
        mMessageTextBox->setVisible(false);
    }
}

LLOutfitListGearMenuBase* LLOutfitGallery::createGearMenu()
{
    return new LLOutfitGalleryGearMenu(this);
}

static LLDefaultChildRegistry::Register<LLOutfitGalleryItem> r("outfit_gallery_item");

LLOutfitGalleryItem::LLOutfitGalleryItem(const Params& p)
    : LLPanel(p),
    mGallery(nullptr),
    mTexturep(nullptr),
    mSelected(false),
    mWorn(false),
    mDefaultImage(true),
    mOutfitName(""),
    mUUID(LLUUID())
{
    buildFromFile("panel_outfit_gallery_item.xml");
}

LLOutfitGalleryItem::~LLOutfitGalleryItem()
{

}

bool LLOutfitGalleryItem::postBuild()
{
    setDefaultImage();

    mOutfitNameText = getChild<LLTextBox>("outfit_name");
    mOutfitWornText = getChild<LLTextBox>("outfit_worn_text");
    mTextBgPanel = getChild<LLPanel>("text_bg_panel");
    setOutfitWorn(false);
    mHidden = false;
    return true;
}

void LLOutfitGalleryItem::draw()
{
    LLPanel::draw();

    // Draw border
    LLUIColor border_color = LLUIColorTable::instance().getColor(mSelected ? "OutfitGalleryItemSelected" : "OutfitGalleryItemUnselected", LLColor4::white);
    LLRect border = getChildView("preview_outfit")->getRect();
    border.mRight = border.mRight + 1;
    gl_rect_2d(border, border_color.get(), false);

    // If the floater is focused, don't apply its alpha to the texture (STORM-677).
    const F32 alpha = getTransparencyType() == TT_ACTIVE ? 1.0f : getCurrentTransparency();
    if (mTexturep)
    {
        if (mImageUpdatePending && mTexturep->getDiscardLevel() >= 0)
        {
            mImageUpdatePending = false;
            if (mTexturep->getOriginalWidth() > MAX_OUTFIT_PHOTO_WIDTH || mTexturep->getOriginalHeight() > MAX_OUTFIT_PHOTO_HEIGHT)
            {
                setDefaultImage();
            }
        }
        else
        {
            LLRect interior = border;
            interior.stretch(-1);

            gl_draw_scaled_image(interior.mLeft - 1, interior.mBottom, interior.getWidth(), interior.getHeight(), mTexturep, UI_VERTEX_COLOR % alpha);

            // Pump the priority
            mTexturep->addTextureStats((F32)(interior.getWidth() * interior.getHeight()));
        }
    }

}

void LLOutfitGalleryItem::setOutfitName(std::string name)
{
    mOutfitNameText->setText(name);
    mOutfitNameText->setToolTip(name);
    mOutfitName = name;
}

void LLOutfitGalleryItem::setOutfitWorn(bool value)
{
    mWorn = value;
    LLStringUtil::format_map_t worn_string_args;
    std::string worn_string = getString("worn_string", worn_string_args);
    LLUIColor text_color = LLUIColorTable::instance().getColor("White", LLColor4::white);
    mOutfitWornText->setReadOnlyColor(text_color.get());
    mOutfitNameText->setReadOnlyColor(text_color.get());
    mOutfitWornText->setFont(value ? LLFontGL::getFontSansSerifBold() : LLFontGL::getFontSansSerifSmall());
    mOutfitNameText->setFont(value ? LLFontGL::getFontSansSerifBold() : LLFontGL::getFontSansSerifSmall());
    mOutfitWornText->setValue(value ? worn_string : "");
    mOutfitNameText->setText(mOutfitName); // refresh LLTextViewModel to pick up font changes
}

void LLOutfitGalleryItem::setSelected(bool value)
{
    mSelected = value;
    mTextBgPanel->setBackgroundVisible(value);
    setOutfitWorn(mWorn);
}

bool LLOutfitGalleryItem::handleMouseDown(S32 x, S32 y, MASK mask)
{
    setFocus(true);
    return LLUICtrl::handleMouseDown(x, y, mask);
}

bool LLOutfitGalleryItem::handleRightMouseDown(S32 x, S32 y, MASK mask)
{
    setFocus(true);
    return LLUICtrl::handleRightMouseDown(x, y, mask);
}

bool LLOutfitGalleryItem::handleDoubleClick(S32 x, S32 y, MASK mask)
{
    return openOutfitsContent() || LLPanel::handleDoubleClick(x, y, mask);
}

bool LLOutfitGalleryItem::handleKeyHere(KEY key, MASK mask)
{
    if (!mGallery)
    {
        return false;
    }

    bool handled = false;
    switch (key)
    {
        case KEY_LEFT:
            mGallery->moveLeft();
            handled = true;
            break;

        case KEY_RIGHT:
            mGallery->moveRight();
            handled = true;
            break;

        case KEY_UP:
            mGallery->moveUp();
            handled = true;
            break;

        case KEY_DOWN:
            mGallery->moveDown();
            handled = true;
            break;

        default:
            break;
    }
    return handled;
}

void LLOutfitGalleryItem::onFocusLost()
{
    setSelected(false);

    LLPanel::onFocusLost();
}

void LLOutfitGalleryItem::onFocusReceived()
{
    setSelected(true);

    LLPanel::onFocusReceived();
}

bool LLOutfitGalleryItem::openOutfitsContent()
{
    LLTabContainer* appearence_tabs = LLPanelOutfitsInventory::findInstance()->getChild<LLTabContainer>("appearance_tabs");
    if (appearence_tabs && mUUID.notNull())
    {
        appearence_tabs->selectTabByName("outfitslist_tab");
        LLPanel* panel = appearence_tabs->getCurrentPanel();
        if (panel)
        {
            LLAccordionCtrl* accordion = panel->getChild<LLAccordionCtrl>("outfits_accordion");
            LLOutfitsList* outfit_list = dynamic_cast<LLOutfitsList*>(panel);
            if (accordion != NULL && outfit_list != NULL)
            {
                outfit_list->setSelectedOutfitByUUID(mUUID);
                LLAccordionCtrlTab* tab = accordion->getSelectedTab();
                if (tab)
                {
                    tab->showAndFocusHeader();
                    return true;
                }
            }
        }
    }
    return false;
}

bool LLOutfitGalleryItem::setImageAssetId(LLUUID image_asset_id)
{
    LLPointer<LLViewerFetchedTexture> texture = LLViewerTextureManager::getFetchedTexture(image_asset_id, FTT_DEFAULT, MIPMAP_YES, LLGLTexture::BOOST_NONE, LLViewerTexture::LOD_TEXTURE);
    if (texture && texture->getOriginalWidth() <= MAX_OUTFIT_PHOTO_WIDTH && texture->getOriginalHeight() <= MAX_OUTFIT_PHOTO_HEIGHT)
    {
        mImageAssetId = image_asset_id;
        mTexturep = texture;
        getChildView("preview_outfit")->setVisible(false);
        mDefaultImage = false;
        mImageUpdatePending = (texture->getDiscardLevel() == -1);
        return true;
    }
    return false;
}

LLUUID LLOutfitGalleryItem::getImageAssetId()
{
    return mImageAssetId;
}

void LLOutfitGalleryItem::setDefaultImage()
{
    mTexturep = NULL;
    mImageAssetId.setNull();
    getChildView("preview_outfit")->setVisible(true);
    mDefaultImage = true;
    mImageUpdatePending = false;
}

LLContextMenu* LLOutfitGalleryContextMenu::createMenu()
{
    LLUICtrl::CommitCallbackRegistry::ScopedRegistrar registrar;
    LLUICtrl::EnableCallbackRegistry::ScopedRegistrar enable_registrar;
    LLUUID selected_id = mUUIDs.front();

    registrar.add("Outfit.WearReplace",
                  boost::bind(&LLAppearanceMgr::replaceCurrentOutfit, &LLAppearanceMgr::instance(), selected_id));
    registrar.add("Outfit.WearAdd",
                  boost::bind(&LLAppearanceMgr::addCategoryToCurrentOutfit, &LLAppearanceMgr::instance(), selected_id));
    registrar.add("Outfit.TakeOff",
                  boost::bind(&LLAppearanceMgr::takeOffOutfit, &LLAppearanceMgr::instance(), selected_id));
    registrar.add("Outfit.Edit", boost::bind(editOutfit));
    registrar.add("Outfit.Rename", boost::bind(renameOutfit, selected_id));
    registrar.add("Outfit.Delete", boost::bind(LLOutfitGallery::onRemoveOutfit, selected_id));
    registrar.add("Outfit.Create", boost::bind(&LLOutfitGalleryContextMenu::onCreate, this, _2));
    registrar.add("Outfit.Thumbnail", boost::bind(&LLOutfitGalleryContextMenu::onThumbnail, this, selected_id));
    registrar.add("Outfit.Save", boost::bind(&LLOutfitGalleryContextMenu::onSave, this, selected_id));
    enable_registrar.add("Outfit.OnEnable", boost::bind(&LLOutfitGalleryContextMenu::onEnable, this, _2));
    enable_registrar.add("Outfit.OnVisible", boost::bind(&LLOutfitGalleryContextMenu::onVisible, this, _2));

    return createFromFile("menu_gallery_outfit_tab.xml");
}

void LLOutfitGalleryContextMenu::onCreate(const LLSD& data)
{
    LLWearableType::EType type = LLWearableType::getInstance()->typeNameToType(data.asString());
    if (type == LLWearableType::WT_NONE)
    {
        LL_WARNS() << "Invalid wearable type" << LL_ENDL;
        return;
    }

    LLAgentWearables::createWearable(type, true);
}

bool LLOutfitGalleryContextMenu::onEnable(LLSD::String param)
{
    return LLOutfitContextMenu::onEnable(param);
}

bool LLOutfitGalleryContextMenu::onVisible(LLSD::String param)
{
    return LLOutfitContextMenu::onVisible(param);
}

LLOutfitGalleryGearMenu::LLOutfitGalleryGearMenu(LLOutfitListBase* olist)
    : LLOutfitListGearMenuBase(olist)
{
}

void LLOutfitGalleryGearMenu::onUpdateItemsVisibility()
{
    if (!mMenu) return;
    bool have_selection = getSelectedOutfitID().notNull();
    mMenu->setItemVisible("expand", false);
    mMenu->setItemVisible("collapse", false);
    mMenu->setItemVisible("thumbnail", have_selection);
    mMenu->setItemVisible("sepatator3", true);
    mMenu->setItemVisible("sort_folders_by_name", true);
    LLOutfitListGearMenuBase::onUpdateItemsVisibility();
}

void LLOutfitGalleryGearMenu::onChangeSortOrder()
{
    bool sort_by_name = !gSavedSettings.getBOOL("OutfitGallerySortByName");
    gSavedSettings.setBOOL("OutfitGallerySortByName", sort_by_name);
    LLOutfitGallery* gallery = dynamic_cast<LLOutfitGallery*>(mOutfitList);
    if (gallery)
    {
        gallery->reArrangeRows();
    }
}

bool LLOutfitGalleryGearMenu::hasDefaultImage()
{
    LLOutfitGallery* gallery = dynamic_cast<LLOutfitGallery*>(mOutfitList);
    LLUUID selected_outfit_id = getSelectedOutfitID();
    if (gallery && selected_outfit_id.notNull())
    {
        return gallery->hasDefaultImage(selected_outfit_id);
    }
    return true;
}

void LLOutfitGallery::onTextureSelectionChanged(LLInventoryItem* itemp)
{
}

void LLOutfitGallery::refreshOutfit(const LLUUID& category_id)
{
    LLViewerInventoryCategory* category = gInventory.getCategory(category_id);
    if (category)
    {
        bool photo_loaded = false;
        LLUUID asset_id = category->getThumbnailUUID();
        if (asset_id.isNull())
        {
            LLInventoryModel::cat_array_t sub_cat_array;
            LLInventoryModel::item_array_t outfit_item_array;
            // Collect all sub-categories of a given category.
            gInventory.collectDescendents(
                category->getUUID(),
                sub_cat_array,
                outfit_item_array,
                LLInventoryModel::EXCLUDE_TRASH);
            for (LLViewerInventoryItem* outfit_item : outfit_item_array)
            {
                LLViewerInventoryItem* linked_item = outfit_item->getLinkedItem();
                LLUUID asset_id, inv_id;
                std::string item_name;
                if (linked_item != NULL)
                {
                    if (linked_item->getActualType() == LLAssetType::AT_TEXTURE)
                    {
                        asset_id = linked_item->getAssetUUID();
                        inv_id = linked_item->getUUID();
                        item_name = linked_item->getName();
                    }
                }
                else if (outfit_item->getActualType() == LLAssetType::AT_TEXTURE)
                {
                    asset_id = outfit_item->getAssetUUID();
                    inv_id = outfit_item->getUUID();
                    item_name = outfit_item->getName();
                }
                if (category->getThumbnailUUID().notNull())
                {
                    asset_id = category->getThumbnailUUID();
                }
                if (asset_id.notNull())
                {
                    photo_loaded |= mOutfitMap[category_id]->setImageAssetId(asset_id);
                    // Rename links
                    if (!mOutfitRenamePending.isNull() && mOutfitRenamePending.asString() == item_name)
                    {
                        LLViewerInventoryCategory *outfit_cat = gInventory.getCategory(mOutfitRenamePending);
                        LLStringUtil::format_map_t photo_string_args;
                        photo_string_args["OUTFIT_NAME"] = outfit_cat->getName();
                        std::string new_name = getString("outfit_photo_string", photo_string_args);
                        LLSD updates;
                        updates["name"] = new_name;
                        update_inventory_item(inv_id, updates, NULL);
                        mOutfitRenamePending.setNull();
                        LLFloater* appearance_floater = LLFloaterReg::getInstance("appearance");
                        if (appearance_floater)
                        {
                            appearance_floater->setFocus(true);
                        }
                    }
                    if (item_name == LLAppearanceMgr::sExpectedTextureName)
                    {
                        // Images with "appropriate" name take priority
                        break;
                    }
                }
                if (!photo_loaded)
                {
                    mOutfitMap[category_id]->setDefaultImage();
                }
            }
        }
        else
        {
            mOutfitMap[category_id]->setImageAssetId(asset_id);
        }
    }

    if (mGalleryCreated && !LLApp::isExiting())
    {
        reArrangeRows();
    }
}

LLUUID LLOutfitGallery::getPhotoAssetId(const LLUUID& outfit_id)
{
    outfit_map_t::iterator outfit_it = mOutfitMap.find(outfit_id);
    if (outfit_it != mOutfitMap.end())
    {
        return outfit_it->second->getImageAssetId();
    }
    return LLUUID();
}

LLUUID LLOutfitGallery::getDefaultPhoto()
{
    return LLUUID();
}