llviewertexteditor.cpp

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#include "llviewerprecompiledheaders.h"

#include "llfocusmgr.h"
#include "audioengine.h"
#include "llagent.h"
#include "llinventory.h"
#include "llinventorymodel.h"
#include "llinventoryview.h"
#include "llinventorybridge.h"  // for landmark prefix string

#include "llviewertexteditor.h"

#include "llfloaterchat.h"
#include "llfloaterworldmap.h"
#include "llnotify.h"
#include "llpreview.h"
#include "llpreviewtexture.h"
#include "llpreviewnotecard.h"
#include "llpreviewlandmark.h"
#include "llscrollbar.h"
#include "lltooldraganddrop.h"
#include "llviewercontrol.h"
#include "llviewerimagelist.h"
#include "llviewerwindow.h"
#include "llviewerinventory.h"
#include "lluictrlfactory.h"
#include "llnotecard.h"
#include "llmemorystream.h"
#include "llmenugl.h"

#include "llappviewer.h" // for gPacificDaylightTime

static LLRegisterWidget<LLViewerTextEditor> r("text_editor");

class LLEmbeddedNotecardOpener : public LLInventoryCallback
{
        LLViewerTextEditor* mTextEditor;

public:
        LLEmbeddedNotecardOpener()
                : mTextEditor(NULL)
        {
        }

        void setEditor(LLViewerTextEditor* e) {mTextEditor = e;}

        // override
        void fire(const LLUUID& inv_item)
        {
                if(!mTextEditor)
                {
                        // The parent text editor may have vanished by now. 
            // In that case just quit.
                        return;
                }

                LLInventoryItem* item = gInventory.getItem(inv_item);
                if(!item)
                {
                        llwarns << "Item add reported, but not found in inventory!: " << inv_item << llendl;
                }
                else
                {
                        // See if we can bring an existing preview to the front
                        if(!LLPreview::show(item->getUUID(), true))
                        {
                                if(!gSavedSettings.getBOOL("ShowNewInventory"))
                                {
                                        // There isn't one, so make a new preview
                                        S32 left, top;
                                        gFloaterView->getNewFloaterPosition(&left, &top);
                                        LLRect rect = gSavedSettings.getRect("NotecardEditorRect");
                                        rect.translate(left - rect.mLeft, top - rect.mTop);
                                        LLPreviewNotecard* preview;
                                        preview = new LLPreviewNotecard("preview notecard", 
                                                                                                        rect, 
                                                                                                        LLString("Embedded Note: ") + item->getName(),
                                                                                                        item->getUUID(), 
                                                                                                        LLUUID::null, 
                                                                                                        item->getAssetUUID(),
                                                                                                        true, 
                                                                                                        (LLViewerInventoryItem*)item);
                                        preview->setSourceID(LLUUID::null);
                                        preview->setFocus(TRUE);

                                        // Force to be entirely onscreen.
                                        gFloaterView->adjustToFitScreen(preview, FALSE);
                                }
                        }
                }
        }
};

// LLEmbeddedItems
//
// Embedded items are stored as:
// * A global map of llwchar to LLInventoryItem
// ** This is unique for each item embedded in any notecard
//    to support copy/paste across notecards
// * A per-notecard set of embeded llwchars for easy removal
//   from the global list
// * A per-notecard vector of embedded lwchars for mapping from
//   old style 0x80 + item format notechards

class LLEmbeddedItems
{
public:
        LLEmbeddedItems(const LLViewerTextEditor* editor);
        ~LLEmbeddedItems();
        void clear();

        // return true if there are no embedded items.
        bool empty();
        
        void    bindEmbeddedChars(LLFontGL* font) const;
        void    unbindEmbeddedChars(LLFontGL* font) const;

        BOOL    insertEmbeddedItem(LLInventoryItem* item, llwchar* value, bool is_new);
        BOOL    removeEmbeddedItem( llwchar ext_char );

        BOOL    hasEmbeddedItem(llwchar ext_char); // returns TRUE if /this/ editor has an entry for this item

        void    getEmbeddedItemList( std::vector<LLPointer<LLInventoryItem> >& items );
        void    addItems(const std::vector<LLPointer<LLInventoryItem> >& items);

        llwchar getEmbeddedCharFromIndex(S32 index);

        void    removeUnusedChars();
        void    copyUsedCharsToIndexed();
        S32             getIndexFromEmbeddedChar(llwchar wch);

        void    markSaved();
        
        static LLInventoryItem* getEmbeddedItem(llwchar ext_char); // returns item from static list
        static BOOL getEmbeddedItemSaved(llwchar ext_char); // returns whether item from static list is saved

private:

        struct embedded_info_t
        {
                LLPointer<LLInventoryItem> mItem;
                BOOL mSaved;
        };
        typedef std::map<llwchar, embedded_info_t > item_map_t;
        static item_map_t sEntries;
        static std::stack<llwchar> sFreeEntries;

        std::set<llwchar> mEmbeddedUsedChars;    // list of used llwchars
        std::vector<llwchar> mEmbeddedIndexedChars; // index -> wchar for 0x80 + index format
        const LLViewerTextEditor* mEditor;
};

//statics
LLEmbeddedItems::item_map_t LLEmbeddedItems::sEntries;
std::stack<llwchar> LLEmbeddedItems::sFreeEntries;

LLEmbeddedItems::LLEmbeddedItems(const LLViewerTextEditor* editor)
        : mEditor(editor)
{
}

LLEmbeddedItems::~LLEmbeddedItems()
{
        clear();
}

void LLEmbeddedItems::clear()
{
        // Remove entries for this editor from static list
        for (std::set<llwchar>::iterator iter = mEmbeddedUsedChars.begin();
                 iter != mEmbeddedUsedChars.end();)
        {
                std::set<llwchar>::iterator nextiter = iter++;
                removeEmbeddedItem(*nextiter);
        }
        mEmbeddedUsedChars.clear();
        mEmbeddedIndexedChars.clear();
}

bool LLEmbeddedItems::empty()
{
        removeUnusedChars();
        return mEmbeddedUsedChars.empty();
}

// Inserts a new unique entry
BOOL LLEmbeddedItems::insertEmbeddedItem( LLInventoryItem* item, llwchar* ext_char, bool is_new)
{
        // Now insert a new one
        llwchar wc_emb;
        if (!sFreeEntries.empty())
        {
                wc_emb = sFreeEntries.top();
                sFreeEntries.pop();
        }
        else if (sEntries.empty())
        {
                wc_emb = LLTextEditor::FIRST_EMBEDDED_CHAR;
        }
        else
        {
                item_map_t::iterator last = sEntries.end();
                --last;
                wc_emb = last->first;
                if (wc_emb >= LLTextEditor::LAST_EMBEDDED_CHAR)
                {
                        return FALSE;
                }
                ++wc_emb;
        }

        sEntries[wc_emb].mItem = item;
        sEntries[wc_emb].mSaved = is_new ? FALSE : TRUE;
        *ext_char = wc_emb;
        mEmbeddedUsedChars.insert(wc_emb);
        return TRUE;
}

// Removes an entry (all entries are unique)
BOOL LLEmbeddedItems::removeEmbeddedItem( llwchar ext_char )
{
        mEmbeddedUsedChars.erase(ext_char);
        item_map_t::iterator iter = sEntries.find(ext_char);
        if (iter != sEntries.end())
        {
                sEntries.erase(ext_char);
                sFreeEntries.push(ext_char);
                return TRUE;
        }
        return FALSE;
}
        
// static
LLInventoryItem* LLEmbeddedItems::getEmbeddedItem(llwchar ext_char)
{
        if( ext_char >= LLTextEditor::FIRST_EMBEDDED_CHAR && ext_char <= LLTextEditor::LAST_EMBEDDED_CHAR )
        {
                item_map_t::iterator iter = sEntries.find(ext_char);
                if (iter != sEntries.end())
                {
                        return iter->second.mItem;
                }
        }
        return NULL;
}

// static
BOOL LLEmbeddedItems::getEmbeddedItemSaved(llwchar ext_char)
{
        if( ext_char >= LLTextEditor::FIRST_EMBEDDED_CHAR && ext_char <= LLTextEditor::LAST_EMBEDDED_CHAR )
        {
                item_map_t::iterator iter = sEntries.find(ext_char);
                if (iter != sEntries.end())
                {
                        return iter->second.mSaved;
                }
        }
        return FALSE;
}

llwchar LLEmbeddedItems::getEmbeddedCharFromIndex(S32 index)
{
        if (index >= (S32)mEmbeddedIndexedChars.size())
        {
                llwarns << "No item for embedded char " << index << " using LL_UNKNOWN_CHAR" << llendl;
                return LL_UNKNOWN_CHAR;
        }
        return mEmbeddedIndexedChars[index];
}

void LLEmbeddedItems::removeUnusedChars()
{
        std::set<llwchar> used = mEmbeddedUsedChars;
        const LLWString& wtext = mEditor->getWText();
        for (S32 i=0; i<(S32)wtext.size(); i++)
        {
                llwchar wc = wtext[i];
                if( wc >= LLTextEditor::FIRST_EMBEDDED_CHAR && wc <= LLTextEditor::LAST_EMBEDDED_CHAR )
                {
                        used.erase(wc);
                }
        }
        // Remove chars not actually used
        for (std::set<llwchar>::iterator iter = used.begin();
                 iter != used.end(); ++iter)
        {
                removeEmbeddedItem(*iter);
        }
}

void LLEmbeddedItems::copyUsedCharsToIndexed()
{
        // Prune unused items
        removeUnusedChars();

        // Copy all used llwchars to mEmbeddedIndexedChars
        mEmbeddedIndexedChars.clear();
        for (std::set<llwchar>::iterator iter = mEmbeddedUsedChars.begin();
                 iter != mEmbeddedUsedChars.end(); ++iter)
        {
                mEmbeddedIndexedChars.push_back(*iter);
        }
}

S32 LLEmbeddedItems::getIndexFromEmbeddedChar(llwchar wch)
{
        S32 idx = 0;
        for (std::vector<llwchar>::iterator iter = mEmbeddedIndexedChars.begin();
                 iter != mEmbeddedIndexedChars.end(); ++iter)
        {
                if (wch == *iter)
                        break;
                ++idx;
        }
        if (idx < (S32)mEmbeddedIndexedChars.size())
        {
                return idx;
        }
        else
        {
                llwarns << "Embedded char " << wch << " not found, using 0" << llendl;
                return 0;
        }
}

BOOL LLEmbeddedItems::hasEmbeddedItem(llwchar ext_char)
{
        std::set<llwchar>::iterator iter = mEmbeddedUsedChars.find(ext_char);
        if (iter != mEmbeddedUsedChars.end())
        {
                return TRUE;
        }
        return FALSE;
}

void LLEmbeddedItems::bindEmbeddedChars( LLFontGL* font ) const
{
        if( sEntries.empty() )
        {
                return; 
        }

        for (std::set<llwchar>::const_iterator iter1 = mEmbeddedUsedChars.begin(); iter1 != mEmbeddedUsedChars.end(); ++iter1)
        {
                llwchar wch = *iter1;
                item_map_t::iterator iter2 = sEntries.find(wch);
                if (iter2 == sEntries.end())
                {
                        continue;
                }
                LLInventoryItem* item = iter2->second.mItem;
                if (!item)
                {
                        continue;
                }
                const char* img_name;
                switch( item->getType() )
                {
                  case LLAssetType::AT_TEXTURE:
                        if(item->getInventoryType() == LLInventoryType::IT_SNAPSHOT)
                        {
                                img_name = "inv_item_snapshot.tga";
                        }
                        else
                        {
                                img_name = "inv_item_texture.tga";
                        }

                        break;
                  case LLAssetType::AT_SOUND:                   img_name = "inv_item_sound.tga";        break;
                  case LLAssetType::AT_LANDMARK:                
                        if (item->getFlags() & LLInventoryItem::II_FLAGS_LANDMARK_VISITED)
                        {
                                img_name = "inv_item_landmark_visited.tga";     
                        }
                        else
                        {
                                img_name = "inv_item_landmark.tga";     
                        }
                        break;
                  case LLAssetType::AT_CLOTHING:                img_name = "inv_item_clothing.tga";     break;
                  case LLAssetType::AT_OBJECT:                  
                        if (item->getFlags() & LLInventoryItem::II_FLAGS_OBJECT_HAS_MULTIPLE_ITEMS)
                        {
                                img_name = "inv_item_object_multi.tga"; 
                        }
                        else
                        {
                                img_name = "inv_item_object.tga";       
                        }
                        break;
                  case LLAssetType::AT_NOTECARD:                img_name = "inv_item_notecard.tga";     break;
                  case LLAssetType::AT_LSL_TEXT:                img_name = "inv_item_script.tga";       break;
                  case LLAssetType::AT_BODYPART:                img_name = "inv_item_skin.tga"; break;
                  case LLAssetType::AT_ANIMATION:               img_name = "inv_item_animation.tga";break;
                  case LLAssetType::AT_GESTURE:                 img_name = "inv_item_gesture.tga";      break;
                  default: llassert(0); continue;
                }

                LLUIImagePtr image = LLUI::getUIImage(img_name);

                font->addEmbeddedChar( wch, image->getImage(), item->getName() );
        }
}

void LLEmbeddedItems::unbindEmbeddedChars( LLFontGL* font ) const
{
        if( sEntries.empty() )
        {
                return; 
        }

        for (std::set<llwchar>::const_iterator iter1 = mEmbeddedUsedChars.begin(); iter1 != mEmbeddedUsedChars.end(); ++iter1)
        {
                font->removeEmbeddedChar(*iter1);
        }
}

void LLEmbeddedItems::addItems(const std::vector<LLPointer<LLInventoryItem> >& items)
{
        for (std::vector<LLPointer<LLInventoryItem> >::const_iterator iter = items.begin();
                 iter != items.end(); ++iter)
        {
                LLInventoryItem* item = *iter;
                if (item)
                {
                        llwchar wc;
                        if (!insertEmbeddedItem( item, &wc, false ))
                        {
                                break;
                        }
                        mEmbeddedIndexedChars.push_back(wc);
                }
        }
}

void LLEmbeddedItems::getEmbeddedItemList( std::vector<LLPointer<LLInventoryItem> >& items )
{
        for (std::set<llwchar>::iterator iter = mEmbeddedUsedChars.begin(); iter != mEmbeddedUsedChars.end(); ++iter)
        {
                llwchar wc = *iter;
                LLPointer<LLInventoryItem> item = getEmbeddedItem(wc);
                if (item)
                {
                        items.push_back(item);
                }
        }
}

void LLEmbeddedItems::markSaved()
{
        for (std::set<llwchar>::iterator iter = mEmbeddedUsedChars.begin(); iter != mEmbeddedUsedChars.end(); ++iter)
        {
                llwchar wc = *iter;
                sEntries[wc].mSaved = TRUE;
        }
}


class LLViewerTextEditor::LLTextCmdInsertEmbeddedItem : public LLTextEditor::LLTextCmd
{
public:
        LLTextCmdInsertEmbeddedItem( S32 pos, LLInventoryItem* item )
                : LLTextCmd(pos, FALSE), 
                  mExtCharValue(0)
        {
                mItem = item;
        }

        virtual BOOL execute( LLTextEditor* editor, S32* delta )
        {
                LLViewerTextEditor* viewer_editor = (LLViewerTextEditor*)editor;
                // Take this opportunity to remove any unused embedded items from this editor
                viewer_editor->mEmbeddedItemList->removeUnusedChars();
                if(viewer_editor->mEmbeddedItemList->insertEmbeddedItem( mItem, &mExtCharValue, true ) )
                {
                        LLWString ws;
                        ws.assign(1, mExtCharValue);
                        *delta = insert(editor, getPosition(), ws );
                        return (*delta != 0);
                }
                return FALSE;
        }
        
        virtual S32 undo( LLTextEditor* editor )
        {
                remove(editor, getPosition(), 1);
                return getPosition(); 
        }
        
        virtual S32 redo( LLTextEditor* editor )
        { 
                LLWString ws;
                ws += mExtCharValue;
                insert(editor, getPosition(), ws );
                return getPosition() + 1;
        }
        virtual BOOL hasExtCharValue( llwchar value ) const
        {
                return (value == mExtCharValue);
        }

private:
        LLPointer<LLInventoryItem> mItem;
        llwchar mExtCharValue;
};

struct LLNotecardCopyInfo
{
        LLNotecardCopyInfo(LLViewerTextEditor *ed, LLInventoryItem *item)
                : mTextEd(ed)
        {
                mItem = item;
        }

        LLViewerTextEditor* mTextEd;
        // need to make this be a copy (not a * here) because it isn't stable.
        // I wish we had passed LLPointers all the way down, but we didn't
        LLPointer<LLInventoryItem> mItem;
};

//----------------------------------------------------------------------------

//
// Member functions
//

LLViewerTextEditor::LLViewerTextEditor(const LLString& name, 
                                                                           const LLRect& rect, 
                                                                           S32 max_length, 
                                                                           const LLString& default_text, 
                                                                           const LLFontGL* font,
                                                                           BOOL allow_embedded_items)
        : LLTextEditor(name, rect, max_length, default_text, font, allow_embedded_items),
          mDragItemSaved(FALSE),
          mInventoryCallback(new LLEmbeddedNotecardOpener)
{
        mEmbeddedItemList = new LLEmbeddedItems(this);
        mInventoryCallback->setEditor(this);

        // *TODO: Add right click menus for SLURLs
        // Build the right click menu
        // make the popup menu available

        //LLMenuGL* menu = LLUICtrlFactory::getInstance()->buildMenu("menu_slurl.xml", this);
        //if (!menu)
        //{
        //      menu = new LLMenuGL("");
        //}
        //menu->setBackgroundColor(gColors.getColor("MenuPopupBgColor"));
        //mPopupMenuHandle = menu->getHandle();
}

LLViewerTextEditor::~LLViewerTextEditor()
{
        delete mEmbeddedItemList;
        
        
        // The inventory callback may still be in use by gInventoryCallbackManager...
        // so set its reference to this to null.
        mInventoryCallback->setEditor(NULL); 
}

// virtual
void LLViewerTextEditor::makePristine()
{
        mEmbeddedItemList->markSaved();
        LLTextEditor::makePristine();
}


BOOL LLViewerTextEditor::handleToolTip(S32 x, S32 y, LLString& msg, LLRect* sticky_rect_screen)
{
        for (child_list_const_iter_t child_iter = getChildList()->begin();
                        child_iter != getChildList()->end(); ++child_iter)
        {
                LLView *viewp = *child_iter;
                S32 local_x = x - viewp->getRect().mLeft;
                S32 local_y = y - viewp->getRect().mBottom;
                if( viewp->handleToolTip(local_x, local_y, msg, sticky_rect_screen ) )
                {
                        return TRUE;
                }
        }

        if( mSegments.empty() )
        {
                return TRUE;
        }

        const LLTextSegment* cur_segment = getSegmentAtLocalPos( x, y );
        if( cur_segment )
        {
                BOOL has_tool_tip = FALSE;
                if( cur_segment->getStyle()->getIsEmbeddedItem() )
                {
                        LLWString wtip;
                        has_tool_tip = getEmbeddedItemToolTipAtPos(cur_segment->getStart(), wtip);
                        msg = wstring_to_utf8str(wtip);
                }
                else
                {
                        has_tool_tip = cur_segment->getToolTip( msg );
                }
                if( has_tool_tip )
                {
                        // Just use a slop area around the cursor
                        // Convert rect local to screen coordinates
                        S32 SLOP = 8;
                        localPointToScreen( 
                                x - SLOP, y - SLOP, 
                                &(sticky_rect_screen->mLeft), &(sticky_rect_screen->mBottom) );
                        sticky_rect_screen->mRight = sticky_rect_screen->mLeft + 2 * SLOP;
                        sticky_rect_screen->mTop = sticky_rect_screen->mBottom + 2 * SLOP;
                }
        }
        return TRUE;
}

BOOL LLViewerTextEditor::handleMouseDown(S32 x, S32 y, MASK mask)
{
        BOOL    handled = FALSE;

        // Let scrollbar have first dibs
        handled = LLView::childrenHandleMouseDown(x, y, mask) != NULL;

        // enable I Agree checkbox if the user scrolled through entire text
        BOOL was_scrolled_to_bottom = (mScrollbar->getDocPos() == mScrollbar->getDocPosMax());
        if (mOnScrollEndCallback && was_scrolled_to_bottom)
        {
                mOnScrollEndCallback(mOnScrollEndData);
        }

        if( !handled && mTakesNonScrollClicks)
        {
                if (!(mask & MASK_SHIFT))
                {
                        deselect();
                }

                BOOL start_select = TRUE;
                if( allowsEmbeddedItems() )
                {
                        setCursorAtLocalPos( x, y, FALSE );
                        llwchar wc = 0;
                        if (mCursorPos < getLength())
                        {
                                wc = getWChar(mCursorPos);
                        }
                        LLInventoryItem* item_at_pos = LLEmbeddedItems::getEmbeddedItem(wc);
                        if (item_at_pos)
                        {
                                mDragItem = item_at_pos;
                                mDragItemSaved = LLEmbeddedItems::getEmbeddedItemSaved(wc);
                                gFocusMgr.setMouseCapture( this );
                                mMouseDownX = x;
                                mMouseDownY = y;
                                S32 screen_x;
                                S32 screen_y;
                                localPointToScreen(x, y, &screen_x, &screen_y );
                                LLToolDragAndDrop::getInstance()->setDragStart( screen_x, screen_y );

                                start_select = FALSE;
                        }
                        else
                        {
                                mDragItem = NULL;
                        }
                }

                if( start_select )
                {
                        // If we're not scrolling (handled by child), then we're selecting
                        if (mask & MASK_SHIFT)
                        {
                                S32 old_cursor_pos = mCursorPos;
                                setCursorAtLocalPos( x, y, TRUE );

                                if (hasSelection())
                                {
                                        /* Mac-like behavior - extend selection towards the cursor
                                        if (mCursorPos < mSelectionStart
                                                && mCursorPos < mSelectionEnd)
                                        {
                                                // ...left of selection
                                                mSelectionStart = llmax(mSelectionStart, mSelectionEnd);
                                                mSelectionEnd = mCursorPos;
                                        }
                                        else if (mCursorPos > mSelectionStart
                                                && mCursorPos > mSelectionEnd)
                                        {
                                                // ...right of selection
                                                mSelectionStart = llmin(mSelectionStart, mSelectionEnd);
                                                mSelectionEnd = mCursorPos;
                                        }
                                        else
                                        {
                                                mSelectionEnd = mCursorPos;
                                        }
                                        */
                                        // Windows behavior
                                        mSelectionEnd = mCursorPos;
                                }
                                else
                                {
                                        mSelectionStart = old_cursor_pos;
                                        mSelectionEnd = mCursorPos;
                                }
                                // assume we're starting a drag select
                                mIsSelecting = TRUE;

                        }
                        else
                        {
                                setCursorAtLocalPos( x, y, TRUE );
                                startSelection();
                        }
                        gFocusMgr.setMouseCapture( this );
                }

                handled = TRUE;
        }

        if (hasTabStop())
        {
                setFocus(TRUE);
                handled = TRUE;
        }

        // Delay cursor flashing
        resetKeystrokeTimer();

        return handled;
}


BOOL LLViewerTextEditor::handleHover(S32 x, S32 y, MASK mask)
{
        BOOL handled = FALSE;

        if (!mDragItem)
        {
                // leave hover segment active during drag and drop
                mHoverSegment = NULL;
        }
        if(hasMouseCapture() )
        {
                if( mIsSelecting ) 
                {
                        if (x != mLastSelectionX || y != mLastSelectionY)
                        {
                                mLastSelectionX = x;
                                mLastSelectionY = y;
                        }

                        if( y > getTextRect().mTop )
                        {
                                mScrollbar->setDocPos( mScrollbar->getDocPos() - 1 );
                        }
                        else
                        if( y < getTextRect().mBottom )
                        {
                                mScrollbar->setDocPos( mScrollbar->getDocPos() + 1 );
                        }

                        setCursorAtLocalPos( x, y, TRUE );
                        mSelectionEnd = mCursorPos;
                        
                        updateScrollFromCursor();
                        getWindow()->setCursor(UI_CURSOR_IBEAM);
                }
                else if( mDragItem )
                {
                        S32 screen_x;
                        S32 screen_y;
                        localPointToScreen(x, y, &screen_x, &screen_y );
                        if( LLToolDragAndDrop::getInstance()->isOverThreshold( screen_x, screen_y ) )
                        {
                                LLToolDragAndDrop::getInstance()->beginDrag(
                                        LLAssetType::lookupDragAndDropType( mDragItem->getType() ),
                                        mDragItem->getUUID(),
                                        LLToolDragAndDrop::SOURCE_NOTECARD,
                                        getSourceID(), mObjectID);

                                return LLToolDragAndDrop::getInstance()->handleHover( x, y, mask );
                        }
                        getWindow()->setCursor(UI_CURSOR_HAND);
                }

                lldebugst(LLERR_USER_INPUT) << "hover handled by " << getName() << " (active)" << llendl;               
                handled = TRUE;
        }

        if( !handled )
        {
                // Pass to children
                handled = LLView::childrenHandleHover(x, y, mask) != NULL;
        }

        if( handled )
        {
                // Delay cursor flashing
                resetKeystrokeTimer();
        }

        // Opaque
        if( !handled && mTakesNonScrollClicks)
        {
                // Check to see if we're over an HTML-style link
                if( !mSegments.empty() )
                {
                        const LLTextSegment* cur_segment = getSegmentAtLocalPos( x, y );
                        if( cur_segment )
                        {
                                if(cur_segment->getStyle()->isLink())
                                {
                                        lldebugst(LLERR_USER_INPUT) << "hover handled by " << getName() << " (over link, inactive)" << llendl;          
                                        getWindow()->setCursor(UI_CURSOR_HAND);
                                        handled = TRUE;
                                }
                                else
                                if(cur_segment->getStyle()->getIsEmbeddedItem())
                                {
                                        lldebugst(LLERR_USER_INPUT) << "hover handled by " << getName() << " (over embedded item, inactive)" << llendl;         
                                        getWindow()->setCursor(UI_CURSOR_HAND);
                                        //getWindow()->setCursor(UI_CURSOR_ARROW);
                                        handled = TRUE;
                                }
                                mHoverSegment = cur_segment;
                        }
                }

                if( !handled )
                {
                        lldebugst(LLERR_USER_INPUT) << "hover handled by " << getName() << " (inactive)" << llendl;             
                        if (!mScrollbar->getVisible() || x < getRect().getWidth() - SCROLLBAR_SIZE)
                        {
                                getWindow()->setCursor(UI_CURSOR_IBEAM);
                        }
                        else
                        {
                                getWindow()->setCursor(UI_CURSOR_ARROW);
                        }
                        handled = TRUE;
                }
        }

        return handled;
}


BOOL LLViewerTextEditor::handleMouseUp(S32 x, S32 y, MASK mask)
{
        BOOL    handled = FALSE;

        // let scrollbar have first dibs
        handled = LLView::childrenHandleMouseUp(x, y, mask) != NULL;

        // Used to enable I Agree checkbox if the user scrolled through entire text
        BOOL was_scrolled_to_bottom = (mScrollbar->getDocPos() == mScrollbar->getDocPosMax());
        if (mOnScrollEndCallback && was_scrolled_to_bottom)
        {
                mOnScrollEndCallback(mOnScrollEndData);
        }

        if( !handled && mTakesNonScrollClicks)
        {
                if( mIsSelecting )
                {
                        // Finish selection
                        if( y > getTextRect().mTop )
                        {
                                mScrollbar->setDocPos( mScrollbar->getDocPos() - 1 );
                        }
                        else
                        if( y < getTextRect().mBottom )
                        {
                                mScrollbar->setDocPos( mScrollbar->getDocPos() + 1 );
                        }
                        
                        setCursorAtLocalPos( x, y, TRUE );
                        endSelection();

                        updateScrollFromCursor();
                }
                
                if( !hasSelection() )
                {
                        handleMouseUpOverSegment( x, y, mask );
                }

                handled = TRUE;
        }

        // Delay cursor flashing
        resetKeystrokeTimer();

        if( hasMouseCapture()  )
        {
                if (mDragItem)
                {
                        // mouse down was on an item
                        S32 dx = x - mMouseDownX;
                        S32 dy = y - mMouseDownY;
                        if (-2 < dx && dx < 2 && -2 < dy && dy < 2)
                        {
                                if(mDragItemSaved)
                                {
                                        openEmbeddedItem(mDragItem);
                                }else
                                {
                                        showUnsavedAlertDialog(mDragItem);
                                }
                        }
                }
                mDragItem = NULL;
                gFocusMgr.setMouseCapture( NULL );
                handled = TRUE;
        }

        return handled;
}

BOOL LLViewerTextEditor::handleRightMouseDown(S32 x, S32 y, MASK mask)
{
        BOOL handled = childrenHandleRightMouseDown(x, y, mask) != NULL;

        // *TODO: Add right click menus for SLURLs
//      if(! handled)
//      {
//              const LLTextSegment* cur_segment = getSegmentAtLocalPos( x, y );
//              if( cur_segment )
//              {
//                      if(cur_segment->getStyle()->isLink())
//                      {
//                              handled = TRUE;
//                              mHTML = cur_segment->getStyle()->getLinkHREF();
//                      }
//              }
//      }
//      LLMenuGL* menu = (LLMenuGL*)mPopupMenuHandle.get();
//      if(handled && menu && mParseHTML && mHTML.length() > 0)
//      {
//              menu->setVisible(TRUE);
//              menu->arrange();
//              menu->updateParent(LLMenuGL::sMenuContainer);
//              LLMenuGL::showPopup(this, menu, x, y);
//              mHTML = "";
//      }
//      else
//      {
//              if(menu && menu->getVisible())
//              {
//                      menu->setVisible(FALSE);
//              }
//      }
        return handled;
}

BOOL LLViewerTextEditor::handleDoubleClick(S32 x, S32 y, MASK mask)
{
        BOOL    handled = FALSE;

        // let scrollbar have first dibs
        handled = LLView::childrenHandleDoubleClick(x, y, mask) != NULL;

        if( !handled && mTakesNonScrollClicks)
        {
                if( allowsEmbeddedItems() )
                {
                        const LLTextSegment* cur_segment = getSegmentAtLocalPos( x, y );
                        if( cur_segment && cur_segment->getStyle()->getIsEmbeddedItem() )
                        {
                                if( openEmbeddedItemAtPos( cur_segment->getStart() ) )
                                {
                                        deselect();
                                        setFocus( FALSE );
                                        return TRUE;
                                }
                        }
                }

        
                setCursorAtLocalPos( x, y, FALSE );
                deselect();

                const LLWString &text = getWText();
                
                if( isPartOfWord( text[mCursorPos] ) )
                {
                        // Select word the cursor is over
                        while ((mCursorPos > 0) && isPartOfWord(text[mCursorPos-1]))
                        {
                                mCursorPos--;
                        }
                        startSelection();

                        while ((mCursorPos < (S32)text.length()) && isPartOfWord( text[mCursorPos] ) )
                        {
                                mCursorPos++;
                        }
                
                        mSelectionEnd = mCursorPos;
                }
                else if ((mCursorPos < (S32)text.length()) && !iswspace( text[mCursorPos]) )
                {
                        // Select the character the cursor is over
                        startSelection();
                        mCursorPos++;
                        mSelectionEnd = mCursorPos;
                }

                // We don't want handleMouseUp() to "finish" the selection (and thereby
                // set mSelectionEnd to where the mouse is), so we finish the selection here.
                mIsSelecting = FALSE;  

                // delay cursor flashing
                resetKeystrokeTimer();

                handled = TRUE;
        }
        return handled;
}


// Allow calling cards to be dropped onto text fields.  Append the name and
// a carriage return.
// virtual
BOOL LLViewerTextEditor::handleDragAndDrop(S32 x, S32 y, MASK mask,
                                          BOOL drop, EDragAndDropType cargo_type, void *cargo_data,
                                          EAcceptance *accept,
                                          LLString& tooltip_msg)
{
        BOOL handled = FALSE;

        if (mTakesNonScrollClicks)
        {
                if (getEnabled() && acceptsTextInput())
                {
                        switch( cargo_type )
                        {
                        case DAD_CALLINGCARD:
                                if(acceptsCallingCardNames())
                                {
                                        if (drop)
                                        {
                                                LLInventoryItem *item = (LLInventoryItem *)cargo_data;
                                                LLString name = item->getName();
                                                appendText(name, true, true);
                                        }
                                        *accept = ACCEPT_YES_COPY_SINGLE;
                                }
                                else
                                {
                                        *accept = ACCEPT_NO;
                                }
                                break;

                        case DAD_TEXTURE:
                        case DAD_SOUND:
                        case DAD_LANDMARK:
                        case DAD_SCRIPT:
                        case DAD_CLOTHING:
                        case DAD_OBJECT:
                        case DAD_NOTECARD:
                        case DAD_BODYPART:
                        case DAD_ANIMATION:
                        case DAD_GESTURE:
                                {
                                        LLInventoryItem *item = (LLInventoryItem *)cargo_data;
                                        if( allowsEmbeddedItems() )
                                        {
                                                U32 mask_next = item->getPermissions().getMaskNextOwner();
                                                if((mask_next & PERM_ITEM_UNRESTRICTED) == PERM_ITEM_UNRESTRICTED)
                                                {
                                                        if( drop )
                                                        {
                                                                deselect();
                                                                S32 old_cursor = mCursorPos;
                                                                setCursorAtLocalPos( x, y, TRUE );
                                                                S32 insert_pos = mCursorPos;
                                                                setCursorPos(old_cursor);
                                                                BOOL inserted = insertEmbeddedItem( insert_pos, item );
                                                                if( inserted && (old_cursor > mCursorPos) )
                                                                {
                                                                        setCursorPos(mCursorPos + 1);
                                                                }

                                                                updateLineStartList();
                                                        }
                                                        *accept = ACCEPT_YES_COPY_MULTI;
                                                }
                                                else
                                                {
                                                        *accept = ACCEPT_NO;
                                                        if (tooltip_msg.empty())
                                                        {
                                                                tooltip_msg.assign("Only items with unrestricted\n"
                                                                                                        "'next owner' permissions \n"
                                                                                                        "can be attached to notecards.");
                                                        }
                                                }
                                        }
                                        else
                                        {
                                                *accept = ACCEPT_NO;
                                        }
                                        break;
                                }

                        default:
                                *accept = ACCEPT_NO;
                                break;
                        }
                }
                else
                {
                        // Not enabled
                        *accept = ACCEPT_NO;
                }

                handled = TRUE;
                lldebugst(LLERR_USER_INPUT) << "dragAndDrop handled by LLViewerTextEditor " << getName() << llendl;
        }

        return handled;
}

void LLViewerTextEditor::setASCIIEmbeddedText(const LLString& instr)
{
        LLWString wtext;
        const U8* buffer = (U8*)(instr.c_str());
        while (*buffer)
        {
                llwchar wch;
                U8 c = *buffer++;
                if (c >= 0x80)
                {
                        S32 index = (S32)(c - 0x80);
                        wch = mEmbeddedItemList->getEmbeddedCharFromIndex(index);
                }
                else
                {
                        wch = (llwchar)c;
                }
                wtext.push_back(wch);
        }
        setWText(wtext);
}

void LLViewerTextEditor::setEmbeddedText(const LLString& instr)
{
        LLWString wtext = utf8str_to_wstring(instr);
        for (S32 i=0; i<(S32)wtext.size(); i++)
        {
                llwchar wch = wtext[i];
                if( wch >= FIRST_EMBEDDED_CHAR && wch <= LAST_EMBEDDED_CHAR )
                {
                        S32 index = wch - FIRST_EMBEDDED_CHAR;
                        wtext[i] = mEmbeddedItemList->getEmbeddedCharFromIndex(index);
                }
        }
        setWText(wtext);
}

LLString LLViewerTextEditor::getEmbeddedText()
{
#if 1
        // New version (Version 2)
        mEmbeddedItemList->copyUsedCharsToIndexed();
        LLWString outtextw;
        for (S32 i=0; i<(S32)getWText().size(); i++)
        {
                llwchar wch = getWChar(i);
                if( wch >= FIRST_EMBEDDED_CHAR && wch <= LAST_EMBEDDED_CHAR )
                {
                        S32 index = mEmbeddedItemList->getIndexFromEmbeddedChar(wch);
                        wch = FIRST_EMBEDDED_CHAR + index;
                }
                outtextw.push_back(wch);
        }
        LLString outtext = wstring_to_utf8str(outtextw);
        return outtext;
#else
        // Old version (Version 1)
        mEmbeddedItemList->copyUsedCharsToIndexed();
        LLString outtext;
        for (S32 i=0; i<(S32)mWText.size(); i++)
        {
                llwchar wch = mWText[i];
                if( wch >= FIRST_EMBEDDED_CHAR && wch <= LAST_EMBEDDED_CHAR )
                {
                        S32 index = mEmbeddedItemList->getIndexFromEmbeddedChar(wch);
                        wch = 0x80 | index % 128;
                }
                else if (wch >= 0x80)
                {
                        wch = LL_UNKNOWN_CHAR;
                }
                outtext.push_back((U8)wch);
        }
        return outtext;
#endif
}

LLString LLViewerTextEditor::appendTime(bool prepend_newline)
{
        U32 utc_time;
        utc_time = time_corrected();

        // There's only one internal tm buffer.
        struct tm* timep;

        // Convert to Pacific, based on server's opinion of whether
        // it's daylight savings time there.
        timep = utc_to_pacific_time(utc_time, gPacificDaylightTime);

        LLString text = llformat("[%d:%02d]  ", timep->tm_hour, timep->tm_min);
        appendColoredText(text, false, prepend_newline, LLColor4::grey);

        return text;
}

//----------------------------------------------------------------------------
//----------------------------------------------------------------------------

llwchar LLViewerTextEditor::pasteEmbeddedItem(llwchar ext_char)
{
        if (mEmbeddedItemList->hasEmbeddedItem(ext_char))
        {
                return ext_char; // already exists in my list
        }
        LLInventoryItem* item = LLEmbeddedItems::getEmbeddedItem(ext_char);
        if (item)
        {
                // Add item to my list and return new llwchar associated with it
                llwchar new_wc;
                if (mEmbeddedItemList->insertEmbeddedItem( item, &new_wc, true ))
                {
                        return new_wc;
                }
        }
        return LL_UNKNOWN_CHAR; // item not found or list full
}

void LLViewerTextEditor::bindEmbeddedChars(LLFontGL* font) const
{
        mEmbeddedItemList->bindEmbeddedChars( font );
}

void LLViewerTextEditor::unbindEmbeddedChars(LLFontGL* font) const
{
        mEmbeddedItemList->unbindEmbeddedChars( font );
}

BOOL LLViewerTextEditor::getEmbeddedItemToolTipAtPos(S32 pos, LLWString &msg) const
{
        if (pos < getLength())
        {
                LLInventoryItem* item = LLEmbeddedItems::getEmbeddedItem(getWChar(pos));
                if( item )
                {
                        msg = utf8str_to_wstring(item->getName());
                        msg += '\n';
                        msg += utf8str_to_wstring(item->getDescription());
                        return TRUE;
                }
        }
        return FALSE;
}


BOOL LLViewerTextEditor::openEmbeddedItemAtPos(S32 pos)
{
        if( pos < getLength())
        {
                LLInventoryItem* item = LLEmbeddedItems::getEmbeddedItem( getWChar(pos) );
                if( item )
                {
                        BOOL saved = LLEmbeddedItems::getEmbeddedItemSaved( getWChar(pos) );
                        if (saved)
                        {
                                return openEmbeddedItem(item); 
                        }
                        else
                        {
                                showUnsavedAlertDialog(item);
                        }
                }
        }
        return FALSE;
}


BOOL LLViewerTextEditor::openEmbeddedItem(LLInventoryItem* item)
{

        switch( item->getType() )
        {
        case LLAssetType::AT_TEXTURE:
                openEmbeddedTexture( item );
                return TRUE;

        case LLAssetType::AT_SOUND:
                openEmbeddedSound( item );
                return TRUE;

        case LLAssetType::AT_NOTECARD:
                openEmbeddedNotecard( item );
                return TRUE;

        case LLAssetType::AT_LANDMARK:
                openEmbeddedLandmark( item );
                return TRUE;

        case LLAssetType::AT_LSL_TEXT:
        case LLAssetType::AT_CLOTHING:
        case LLAssetType::AT_OBJECT:
        case LLAssetType::AT_BODYPART:
        case LLAssetType::AT_ANIMATION:
        case LLAssetType::AT_GESTURE:
                showCopyToInvDialog( item );
                return TRUE;
        default:
                return FALSE;
        }

}


void LLViewerTextEditor::openEmbeddedTexture( LLInventoryItem* item )
{
        // See if we can bring an existing preview to the front
        // *NOTE:  Just for embedded Texture , we should use getAssetUUID(), 
        // not getUUID(), because LLPreviewTexture pass in AssetUUID into 
        // LLPreview constructor ItemUUID parameter.

        if( !LLPreview::show( item->getAssetUUID() ) )
        {
                // There isn't one, so make a new preview
                if(item)
                {
                        S32 left, top;
                        gFloaterView->getNewFloaterPosition(&left, &top);
                        LLRect rect = gSavedSettings.getRect("PreviewTextureRect");
                        rect.translate( left - rect.mLeft, top - rect.mTop );

                        LLPreviewTexture* preview = new LLPreviewTexture("preview texture",
                                rect,
                                item->getName(),
                                item->getAssetUUID(),
                                TRUE);
                        preview->setAuxItem( item );
                        preview->setNotecardInfo(mNotecardInventoryID, mObjectID);
                }
        }
}

void LLViewerTextEditor::openEmbeddedSound( LLInventoryItem* item )
{
        // Play sound locally
        LLVector3d lpos_global = gAgent.getPositionGlobal();
        const F32 SOUND_GAIN = 1.0f;
        if(gAudiop)
        {
                F32 volume = gSavedSettings.getBOOL("MuteSounds") ? 0.f : (SOUND_GAIN * gSavedSettings.getF32("AudioLevelSFX"));
                gAudiop->triggerSound(item->getAssetUUID(), gAgentID, volume, lpos_global);
        }
        showCopyToInvDialog( item );
}


void LLViewerTextEditor::openEmbeddedLandmark( LLInventoryItem* item )
{
        LLString title =
                LLString("  ") + LLLandmarkBridge::prefix()     + item->getName();
        open_landmark((LLViewerInventoryItem*)item, title, FALSE, item->getUUID(), TRUE);
}

void LLViewerTextEditor::openEmbeddedNotecard( LLInventoryItem* item )
{
        //if (saved)
        //{
                // An LLInventoryItem needs to be in an inventory to be opened.
                // This will give the item to the viewer's agent.
                // The callback will attempt to open it if its not already opened.
        copyInventory(item, gInventoryCallbacks.registerCB(mInventoryCallback));

        //}
        //else
        //{
        //      LLNotecardCopyInfo *info = new LLNotecardCopyInfo(this, item);
        //      gViewerWindow->alertXml("ConfirmNotecardSave",          
        //                                                      LLViewerTextEditor::onNotecardDialog, (void*)info);
        //}
}

void LLViewerTextEditor::showUnsavedAlertDialog( LLInventoryItem* item )
{
        LLNotecardCopyInfo *info = new LLNotecardCopyInfo(this, item);
        gViewerWindow->alertXml( "ConfirmNotecardSave",
                LLViewerTextEditor::onNotecardDialog, (void*)info);
}
// static
void LLViewerTextEditor::onNotecardDialog( S32 option, void* userdata )
{
        LLNotecardCopyInfo *info = (LLNotecardCopyInfo *)userdata;
        if( option == 0 )
        {
                // itemptr is deleted by LLPreview::save
                LLPointer<LLInventoryItem>* itemptr = new LLPointer<LLInventoryItem>(info->mItem);
                LLPreview::save( info->mTextEd->mNotecardInventoryID, itemptr);
        }
}



void LLViewerTextEditor::showCopyToInvDialog( LLInventoryItem* item )
{
        LLNotecardCopyInfo *info = new LLNotecardCopyInfo(this, item);
        gViewerWindow->alertXml( "ConfirmItemCopy",
                LLViewerTextEditor::onCopyToInvDialog, (void*)info);
}

// static
void LLViewerTextEditor::onCopyToInvDialog( S32 option, void* userdata )
{
        LLNotecardCopyInfo *info = (LLNotecardCopyInfo *)userdata;
        if( 0 == option )
        {
                info->mTextEd->copyInventory(info->mItem);
        }
        delete info;
}



// Returns change in number of characters in mWText
S32 LLViewerTextEditor::insertEmbeddedItem( S32 pos, LLInventoryItem* item )
{
        return execute( new LLTextCmdInsertEmbeddedItem( pos, item ) );
}

bool LLViewerTextEditor::importStream(std::istream& str)
{
        LLNotecard nc(LLNotecard::MAX_SIZE);
        bool success = nc.importStream(str);
        if (success)
        {
                mEmbeddedItemList->clear();
                const std::vector<LLPointer<LLInventoryItem> >& items = nc.getItems();
                mEmbeddedItemList->addItems(items);
                // Actually set the text
                if (allowsEmbeddedItems())
                {
                        if (nc.getVersion() == 1)
                                setASCIIEmbeddedText( nc.getText() );
                        else
                                setEmbeddedText( nc.getText() );
                }
                else
                {
                        setText( nc.getText() );
                }
        }
        return success;
}

void LLViewerTextEditor::copyInventory(const LLInventoryItem* item, U32 callback_id)
{
        copy_inventory_from_notecard(mObjectID,
                                                                 mNotecardInventoryID,
                                                                 item, callback_id);
}

bool LLViewerTextEditor::hasEmbeddedInventory()
{
        return ! mEmbeddedItemList->empty();
}


BOOL LLViewerTextEditor::importBuffer( const LLString& buffer )
{
        LLMemoryStream str((U8*)buffer.c_str(), buffer.length());
        return importStream(str);
}

BOOL LLViewerTextEditor::exportBuffer( LLString& buffer )
{
        LLNotecard nc(LLNotecard::MAX_SIZE);

        // Get the embedded text and update the item list to just be the used items
        nc.setText(getEmbeddedText());

        // Now get the used items and copy the list to the notecard
        std::vector<LLPointer<LLInventoryItem> > embedded_items;
        mEmbeddedItemList->getEmbeddedItemList(embedded_items); 
        nc.setItems(embedded_items);
        
        std::stringstream out_stream;
        nc.exportStream(out_stream);
        
        buffer = out_stream.str();
        
        return TRUE;
}

LLView* LLViewerTextEditor::fromXML(LLXMLNodePtr node, LLView *parent, LLUICtrlFactory *factory)
{
        LLString name("text_editor");
        node->getAttributeString("name", name);

        LLRect rect;
        createRect(node, rect, parent, LLRect());

        U32 max_text_length = 255;
        node->getAttributeU32("max_length", max_text_length);

        BOOL allow_embedded_items = FALSE;
        node->getAttributeBOOL("embedded_items", allow_embedded_items);

        LLFontGL* font = LLView::selectFont(node);

        // LLString text = node->getValue();
        LLString text = node->getTextContents().substr(0, max_text_length - 1);

        if (text.size() > max_text_length)
        {
                // Erase everything from max_text_length on.
                text.erase(max_text_length);
        }

        LLViewerTextEditor* text_editor = new LLViewerTextEditor(name, 
                                                                rect,
                                                                max_text_length,
                                                                "",
                                                                font,
                                                                allow_embedded_items);

        BOOL ignore_tabs = text_editor->tabsToNextField();
        node->getAttributeBOOL("ignore_tab", ignore_tabs);
        text_editor->setTabsToNextField(ignore_tabs);

        text_editor->setTextEditorParameters(node);

        BOOL hide_scrollbar = FALSE;
        node->getAttributeBOOL("hide_scrollbar",hide_scrollbar);
        text_editor->setHideScrollbarForShortDocs(hide_scrollbar);

        BOOL hide_border = !text_editor->isBorderVisible();
        node->getAttributeBOOL("hide_border", hide_border);
        text_editor->setBorderVisible(!hide_border);

        BOOL parse_html = text_editor->mParseHTML;
        node->getAttributeBOOL("allow_html", parse_html);
        text_editor->setParseHTML(parse_html);

        text_editor->initFromXML(node, parent);

        // add text after all parameters have been set
        text_editor->appendStyledText(text, FALSE, FALSE);

        return text_editor;
}

---