llviewertexteditor.cpp

/** 
 * @file llviewertexteditor.cpp
 * @brief Text editor widget to let users enter a multi-line document.
 *
 * $LicenseInfo:firstyear=2001&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2010, Linden Research, Inc.
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation;
 * version 2.1 of the License only.
 * 
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 * 
 * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
 * $/LicenseInfo$
 */

#include "llviewerprecompiledheaders.h"

#include "llviewertexteditor.h"

#include <stack>
#include <utility>
#include "llagent.h"
#include "llaudioengine.h"
#include "llavataractions.h"
#include "llfloaterreg.h"
#include "llfloatersidepanelcontainer.h"
#include "llfloaterworldmap.h"
#include "llfocusmgr.h"
#include "llinventorybridge.h"
#include "llinventorydefines.h"
#include "llinventorymodel.h"
#include "lllandmark.h"
#include "lllandmarkactions.h"
#include "lllandmarklist.h"
#include "llmemorystream.h"
#include "llmenugl.h"
#include "llnotecard.h"
#include "llnotificationsutil.h"
#include "llpanelplaces.h"
#include "llpreview.h"
#include "llpreviewnotecard.h"
#include "llpreviewtexture.h"
#include "llscrollbar.h"
#include "llscrollcontainer.h"
#include "lltooldraganddrop.h"
#include "lltooltip.h"
#include "lltrans.h"
#include "llviewerassettype.h"
#include "llviewercontrol.h"
#include "llviewerinventory.h"
#include "llviewertexturelist.h"
#include "llviewerwindow.h"

static LLDefaultChildRegistry::Register<LLViewerTextEditor> r("text_editor");

///-----------------------------------------------------------------------
///  Class LLEmbeddedLandmarkCopied
///-----------------------------------------------------------------------
class LLEmbeddedLandmarkCopied final : public LLInventoryCallback
{
public:

	LLEmbeddedLandmarkCopied() = default;
	void fire(const LLUUID& inv_item) override
	{
		showInfo(inv_item);
	}
	static void showInfo(const LLUUID& landmark_inv_id)
	{
		LLSD key;
		key["type"] = "landmark";
		key["id"] = landmark_inv_id;
		LLFloaterSidePanelContainer::showPanel("places", key);
	}
	static void processForeignLandmark(LLLandmark* landmark,
			const LLUUID& object_id, const LLUUID& notecard_inventory_id,
			LLPointer<LLInventoryItem> item_ptr)
	{
		LLVector3d global_pos;
		landmark->getGlobalPos(global_pos);
		LLViewerInventoryItem* agent_landmark =
				LLLandmarkActions::findLandmarkForGlobalPos(global_pos);

		if (agent_landmark)
		{
			showInfo(agent_landmark->getUUID());
		}
		else
		{
			if (item_ptr.isNull())
			{
				// check to prevent a crash. See EXT-8459.
				LL_WARNS() << "Passed handle contains a dead inventory item. Most likely notecard has been closed and embedded item was destroyed." << LL_ENDL;
			}
			else
			{
				LLInventoryItem* item = item_ptr.get();
				LLPointer<LLEmbeddedLandmarkCopied> cb = new LLEmbeddedLandmarkCopied();
				copy_inventory_from_notecard(get_folder_by_itemtype(item),
											 object_id,
											 notecard_inventory_id,
											 item,
											 gInventoryCallbacks.registerCB(cb));
			}
		}
	}
};
///----------------------------------------------------------------------------
/// Class LLEmbeddedNotecardOpener
///----------------------------------------------------------------------------
class LLEmbeddedNotecardOpener final : public LLInventoryCallback
{
	LLViewerTextEditor* mTextEditor;

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

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

	// override
	void fire(const LLUUID& inv_item) override
	{
		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)
		{
			LL_WARNS() << "Item add reported, but not found in inventory!: " << inv_item << LL_ENDL;
		}
		else
		{
			if(!gSavedSettings.getBOOL("ShowNewInventory"))
			{
				LLFloaterReg::showInstance("preview_notecard", LLSD(item->getUUID()), TAKE_FOCUS_YES);
			}
		}
	}
};

//
// class LLEmbeddedItemSegment
//

const S32 EMBEDDED_ITEM_LABEL_PADDING = 2;

class LLEmbeddedItemSegment final : public LLTextSegment
{
public:
	LLEmbeddedItemSegment(S32 pos, LLUIImagePtr image, LLPointer<LLInventoryItem> inv_item, LLTextEditor& editor)
	:	LLTextSegment(pos, pos + 1),
		mImage(std::move(image)),
		mLabel(utf8str_to_wstring(inv_item->getName())),
		mItem(inv_item),
		mEditor(editor)
	{

		mStyle = new LLStyle(LLStyle::Params().font(LLFontGL::getFontSansSerif()));
		mToolTip = inv_item->getName() + '\n' + inv_item->getDescription();
	}

	/*virtual*/ bool getDimensionsF32(S32 first_char, S32 num_chars, F32& width, S32& height) const override
    {
		if (num_chars == 0)
		{
			width = 0;
			height = 0;
		}
		else
		{
			width = EMBEDDED_ITEM_LABEL_PADDING + mImage->getWidth() + mStyle->getFont()->getWidthF32(mLabel.c_str());
			height = llmax(mImage->getHeight(), mStyle->getFont()->getLineHeight());
		}
		return false;
	}

	/*virtual*/ S32				getNumChars(S32 num_pixels, S32 segment_offset, S32 line_offset, S32 max_chars, S32 line_ind) const override
    {
		// always draw at beginning of line
		if (line_offset == 0)
		{
			return 1;
		}
		else
		{
			S32 width, height;
			getDimensions(mStart, 1, width, height);
			if (width > num_pixels) 
			{
				return 0;
			}
			else
			{
				return 1;
			}
		}
	}
	/*virtual*/ F32				draw(S32 start, S32 end, S32 selection_start, S32 selection_end, const LLRectf& draw_rect) override
    {
		LLRectf image_rect = draw_rect;
		image_rect.mRight = image_rect.mLeft + mImage->getWidth();
		image_rect.mTop = image_rect.mBottom + mImage->getHeight();
		mImage->draw(LLRect(image_rect.mLeft, image_rect.mTop, image_rect.mRight, image_rect.mBottom));

		static const LLUIColor text_embed_item_readonly_color = LLUIColorTable::instance().getColor("TextEmbeddedItemReadOnlyColor");
		static const LLUIColor text_embed_item_color = LLUIColorTable::instance().getColor("TextEmbeddedItemColor");

		const LLColor4 color = mEditor.getReadOnly() ? text_embed_item_readonly_color : text_embed_item_color;

		F32 right_x;
		mStyle->getFont()->render(mLabel, 0, image_rect.mRight + EMBEDDED_ITEM_LABEL_PADDING, draw_rect.mTop, color, LLFontGL::LEFT, LLFontGL::TOP, LLFontGL::UNDERLINE, LLFontGL::NO_SHADOW, mLabel.length(), S32_MAX, &right_x);
		return right_x;
	}
	
	/*virtual*/ bool			canEdit() const override { return false; }


	/*virtual*/ BOOL			handleHover(S32 x, S32 y, MASK mask) override
    {
		LLUI::getInstance()->getWindow()->setCursor(UI_CURSOR_HAND);
		return TRUE;
	}

    BOOL				handleToolTip(S32 x, S32 y, MASK mask ) override
	{ 
		if (!mToolTip.empty())
		{
			LLToolTipMgr::instance().show(mToolTip);
			return TRUE;
		}
		return FALSE; 
	}

	/*virtual*/ LLStyleConstSP		getStyle() const override { return mStyle; }

private:
	LLUIImagePtr	mImage;
	LLWString		mLabel;
	LLStyleSP		mStyle;
	std::string		mToolTip;
	LLPointer<LLInventoryItem> mItem;
	LLTextEditor&	mEditor;
};



////////////////////////////////////////////////////////////
// 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();
	
	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
	LLUIImagePtr getItemImage(llwchar ext_char) const;

	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 LLPointer<LLInventoryItem> getEmbeddedItemPtr(llwchar ext_char); // returns pointer to 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> mItemPtr;
		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].mItemPtr = 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
LLPointer<LLInventoryItem> LLEmbeddedItems::getEmbeddedItemPtr(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.mItemPtr;
		}
	}
	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())
	{
		LL_WARNS() << "No item for embedded char " << index << " using LL_UNKNOWN_CHAR" << LL_ENDL;
		return LL_UNKNOWN_CHAR;
	}
	return mEmbeddedIndexedChars[index];
}

void LLEmbeddedItems::removeUnusedChars()
{
	std::set<llwchar> used = mEmbeddedUsedChars;
	const LLWString& wtext = mEditor->getWText();
	for (unsigned int wc : wtext)
    {
        if( wc >= LLTextEditor::FIRST_EMBEDDED_CHAR && wc <= LLTextEditor::LAST_EMBEDDED_CHAR )
		{
			used.erase(wc);
		}
	}
	// Remove chars not actually used
	for (auto val : used)
    {
		removeEmbeddedItem(val);
	}
}

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

	// Copy all used llwchars to mEmbeddedIndexedChars
	mEmbeddedIndexedChars.clear();
	for (auto mEmbeddedUsedChar : mEmbeddedUsedChars)
    {
		mEmbeddedIndexedChars.push_back(mEmbeddedUsedChar);
	}
}

S32 LLEmbeddedItems::getIndexFromEmbeddedChar(llwchar wch)
{
	S32 idx = 0;
	for (auto mEmbeddedIndexedChar : mEmbeddedIndexedChars)
    {
		if (wch == mEmbeddedIndexedChar)
			break;
		++idx;
	}
	if (idx < (S32)mEmbeddedIndexedChars.size())
	{
		return idx;
	}
	else
	{
		LL_WARNS() << "Embedded char " << wch << " not found, using 0" << LL_ENDL;
		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;
}


LLUIImagePtr LLEmbeddedItems::getItemImage(llwchar ext_char) const
{
	LLInventoryItem* item = getEmbeddedItemPtr(ext_char);
	if (item)
	{
		const char* img_name = "";
		switch( item->getType() )
		{
			case LLAssetType::AT_TEXTURE:
				if(item->getInventoryType() == LLInventoryType::IT_SNAPSHOT)
				{
					img_name = "Inv_Snapshot";
				}
				else
				{
					img_name = "Inv_Texture";
				}

				break;
			case LLAssetType::AT_SOUND:			img_name = "Inv_Sound";		break;
			case LLAssetType::AT_CLOTHING:		img_name = "Inv_Clothing";	break;
			case LLAssetType::AT_OBJECT:
				img_name = LLInventoryItemFlags::II_FLAGS_OBJECT_HAS_MULTIPLE_ITEMS & item->getFlags() ?
					"Inv_Object_Multi" : "Inv_Object";
				break;
			case LLAssetType::AT_CALLINGCARD:	img_name = "Inv_CallingCard"; break;
			case LLAssetType::AT_LANDMARK:		img_name = "Inv_Landmark"; 	break;
			case LLAssetType::AT_NOTECARD:		img_name = "Inv_Notecard";	break;
			case LLAssetType::AT_LSL_TEXT:		img_name = "Inv_Script";	break;
			case LLAssetType::AT_BODYPART:		img_name = "Inv_Skin";		break;
			case LLAssetType::AT_ANIMATION:		img_name = "Inv_Animation";	break;
			case LLAssetType::AT_GESTURE:		img_name = "Inv_Gesture";	break;
			case LLAssetType::AT_MESH:      	img_name = "Inv_Mesh";	    break;
			default:                        	img_name = "Inv_Invalid";   break; // use the Inv_Invalid icon for undefined object types (see MAINT-3981)
		}

		return LLUI::getUIImage(img_name);
	}
	return LLUIImagePtr();
}


void LLEmbeddedItems::addItems(const std::vector<LLPointer<LLInventoryItem> >& items)
{
	for (const auto& iter : items)
    {
		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 (auto wc : mEmbeddedUsedChars)
    {
        LLPointer<LLInventoryItem> item = getEmbeddedItemPtr(wc);
		if (item)
		{
			items.push_back(item);
		}
	}
}

void LLEmbeddedItems::markSaved()
{
	for (auto wc : mEmbeddedUsedChars)
    {
        sEntries[wc].mSaved = TRUE;
	}
}

///////////////////////////////////////////////////////////////////

class LLViewerTextEditor::TextCmdInsertEmbeddedItem final: public LLTextBase::TextCmd
{
public:
	TextCmdInsertEmbeddedItem( S32 pos, LLInventoryItem* item )
		: TextCmd(pos, FALSE), 
		  mExtCharValue(0)
	{
		mItem = item;
	}

    BOOL execute( LLTextBase* editor, S32* delta ) override
	{
		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;
	}

    S32 undo( LLTextBase* editor ) override
	{
		remove(editor, getPosition(), 1);
		return getPosition(); 
	}

    S32 redo( LLTextBase* editor ) override
	{ 
		LLWString ws;
		ws += mExtCharValue;
		insert(editor, getPosition(), ws );
		return getPosition() + 1;
	}

    BOOL hasExtCharValue( llwchar value ) const override
	{
		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 LLViewerTextEditor::Params& p)
:	LLTextEditor(p),
	mDragSegment(nullptr),
	mDragItemChar(0),
	mDragItemSaved(FALSE),
	mInventoryCallback(new LLEmbeddedNotecardOpener)
{
	mEmbeddedItemList = new LLEmbeddedItems(this);
	mInventoryCallback->setEditor(this);
}

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();
}

void LLViewerTextEditor::onVisibilityChange( BOOL new_visibility )
{
	LLUICtrl::onVisibilityChange(new_visibility);
}

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

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

	if( !handled)
	{
		if( allowsEmbeddedItems() )
		{
			setCursorAtLocalPos( x, y, FALSE );
			llwchar wc = 0;
			if (mCursorPos < getLength())
			{
				wc = getWText()[mCursorPos];
			}
			LLPointer<LLInventoryItem> item_at_pos = LLEmbeddedItems::getEmbeddedItemPtr(wc);
			if (item_at_pos)
			{
				mDragItem = item_at_pos;
				mDragItemChar = wc;
				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 );

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

				handled = TRUE;
			}
			else
			{
				mDragItem = NULL;
			}
		}

		if (!handled)
		{
			handled = LLTextEditor::handleMouseDown(x, y, mask);
		}
	}

	return handled;
}


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

	if(hasMouseCapture() && mDragItem)
	{
		S32 screen_x;
		S32 screen_y;
		localPointToScreen(x, y, &screen_x, &screen_y );

		mScroller->autoScroll(x, y);

		if( LLToolDragAndDrop::getInstance()->isOverThreshold( screen_x, screen_y ) )
		{
			LLToolDragAndDrop::getInstance()->beginDrag(
				LLViewerAssetType::lookupDragAndDropType( mDragItem->getType() ),
				mDragItem->getUUID(),
				LLToolDragAndDrop::SOURCE_NOTECARD,
				mPreviewID, mObjectID);
			return LLToolDragAndDrop::getInstance()->handleHover( x, y, mask );
		}
		getWindow()->setCursor(UI_CURSOR_HAND);
		handled = TRUE;
	}

	return handled;
}


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

	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, mDragItemChar);
				}
				else
				{
					showUnsavedAlertDialog(mDragItem);
				}
			}
		}
		mDragItem = NULL;
	}

	handled = LLTextEditor::handleMouseUp(x,y,mask);

	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)
	{
		if( allowsEmbeddedItems() )
		{
			S32 doc_index = getDocIndexFromLocalCoord(x, y, FALSE);
			llwchar doc_char = getWText()[doc_index];
			if (mEmbeddedItemList->hasEmbeddedItem(doc_char))
			{
				if( openEmbeddedItemAtPos( doc_index ))
				{
					deselect();
					setFocus( FALSE );
					return TRUE;
				}
			}
		}
		handled = LLTextEditor::handleDoubleClick(x, y, mask);
	}
	return handled;
}


// virtual
BOOL LLViewerTextEditor::handleDragAndDrop(S32 x, S32 y, MASK mask,
					  BOOL drop, EDragAndDropType cargo_type, void *cargo_data,
					  EAcceptance *accept,
					  std::string& tooltip_msg)
{
	BOOL handled = FALSE;
	
	LLToolDragAndDrop::ESource source = LLToolDragAndDrop::getInstance()->getSource();
	if (LLToolDragAndDrop::SOURCE_NOTECARD == source)
	{
		// We currently do not handle dragging items from one notecard to another
		// since items in a notecard must be in Inventory to be verified. See DEV-2891.
		return FALSE;
	}
	
	if (getEnabled() && acceptsTextInput())
	{
		switch( cargo_type )
		{
			case DAD_CALLINGCARD:
			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:
			case DAD_MESH:
			{
				LLInventoryItem *item = (LLInventoryItem *)cargo_data;
				if( item && 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);
							}

							needsReflow();
							
						}
						*accept = ACCEPT_YES_COPY_MULTI;
					}
					else
					{
						*accept = ACCEPT_NO;
						if (tooltip_msg.empty())
						{
							// *TODO: Translate
							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;
	LL_DEBUGS("UserInput") << "dragAndDrop handled by LLViewerTextEditor " << getName() << LL_ENDL;

	return handled;
}

void LLViewerTextEditor::setASCIIEmbeddedText(const std::string& 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 std::string& instr)
{
	LLWString wtext = utf8str_to_wstring(instr);
	for (auto& i : wtext)
    {
		llwchar wch = i;
		if( wch >= FIRST_EMBEDDED_CHAR && wch <= LAST_EMBEDDED_CHAR )
		{
			S32 index = wch - FIRST_EMBEDDED_CHAR;
            i = mEmbeddedItemList->getEmbeddedCharFromIndex(index);
		}
	}
	setWText(wtext);
}

std::string LLViewerTextEditor::getEmbeddedText()
{
#if 1
	// New version (Version 2)
	mEmbeddedItemList->copyUsedCharsToIndexed();
	LLWString outtextw;
	for (unsigned int wch : getWText())
    {
        if( wch >= FIRST_EMBEDDED_CHAR && wch <= LAST_EMBEDDED_CHAR )
		{
			S32 index = mEmbeddedItemList->getIndexFromEmbeddedChar(wch);
			wch = FIRST_EMBEDDED_CHAR + index;
		}
		outtextw.push_back(wch);
	}
	std::string outtext = wstring_to_utf8str(outtextw);
	return outtext;
#else
	// Old version (Version 1)
	mEmbeddedItemList->copyUsedCharsToIndexed();
	std::string 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
}

std::string LLViewerTextEditor::appendTime(bool prepend_newline)
{
	time_t utc_time;