/*
*  File:        formulabase.C
*  Purpose:     Implementation of common parts of the LyX  math insets
*  Author:      Alejandro Aguilar Sierra <asierra@servidor.unam.mx>
*  Created:     January 1996
*
*  Copyright: 1996-1998 Alejandro Aguilar Sierra
*
*  Version: 0.4, Lyx project.
*
*   You are free to use and modify this code under the terms of
*   the GNU General Public Licence version 2 or later.
*/

#include <config.h>

#include "Lsstream.h"
#include "support/LAssert.h"
#include "formula.h"
#include "formulamacro.h"
#include "lyxrc.h"
#include "funcrequest.h"
#include "BufferView.h"
#include "lyxtext.h"
#include "gettext.h"
#include "LaTeXFeatures.h"
#include "debug.h"
#include "math_support.h"
#include "metricsinfo.h"
#include "math_data.h"
#include "support/lstrings.h"
#include "support/lyxlib.h"
#include "frontends/LyXView.h"
#include "frontends/font_metrics.h"
#include "frontends/mouse_state.h"
#include "math_arrayinset.h"
#include "math_charinset.h"
#include "math_deliminset.h"
#include "math_cursor.h"
#include "math_factory.h"
#include "math_fontinset.h"
#include "math_hullinset.h"
#include "math_iterator.h"
#include "math_macrotable.h"
#include "math_parser.h"
#include "math_pos.h"
#include "math_spaceinset.h"
#include "undo_funcs.h"
#include "textpainter.h"
#include "frontends/Dialogs.h"
#include "intl.h"
#include "ref_inset.h"

#include <fstream>

using namespace lyx::support;

using std::endl;
using std::ostream;
using std::vector;
using std::abs;
using std::max;


MathCursor * mathcursor = 0;

namespace {

// local global
int first_x;
int first_y;

bool openNewInset(BufferView * bv, UpdatableInset * new_inset)
{
	if (!bv->insertInset(new_inset)) {
		delete new_inset;
		return false;
	}
	new_inset->localDispatch(FuncRequest(bv, LFUN_INSET_EDIT, "left"));
	return true;
}


} // namespace anon



InsetFormulaBase::InsetFormulaBase()
	: xo_(0), yo_(0)
{
	// This is needed as long the math parser is not re-entrant
	initMath();
	//lyxerr << "sizeof MathInset: " << sizeof(MathInset) << "\n";
	//lyxerr << "sizeof MetricsInfo: " << sizeof(MetricsInfo) << "\n";
	//lyxerr << "sizeof MathCharInset: " << sizeof(MathCharInset) << "\n";
	//lyxerr << "sizeof LyXFont: " << sizeof(LyXFont) << "\n";
}


// simply scrap this function if you want
void InsetFormulaBase::mutateToText()
{
#if 0
	// translate to latex
	ostringstream os;
	latex(NULL, os, false, false);
	string str = os.str();

	// insert this text
	LyXText * lt = view_->getLyXText();
	string::const_iterator cit = str.begin();
	string::const_iterator end = str.end();
	for (; cit != end; ++cit)
		view_->owner()->getIntl()->getTransManager().TranslateAndInsert(*cit, lt);

	// remove ourselves
	//view_->owner()->dispatch(LFUN_ESCAPE);
#endif
}


void InsetFormulaBase::handleFont
	(BufferView * bv, string const & arg, string const & font)
{
	// this whole function is a hack and won't work for incremental font
	// changes...
	bv->lockedInsetStoreUndo(Undo::EDIT);
	if (mathcursor->inset()->name() == font)
		mathcursor->handleFont(font);
	else {
		mathcursor->handleNest(createMathInset(font));
		mathcursor->insert(arg);
	}
}


BufferView * InsetFormulaBase::view() const
{
	return view_;
}


void InsetFormulaBase::validate(LaTeXFeatures &) const
{}


string const InsetFormulaBase::editMessage() const
{
	return _("Math editor mode");
}


void InsetFormulaBase::insetUnlock(BufferView * bv)
{
	if (mathcursor) {
		if (mathcursor->inMacroMode()) {
			mathcursor->macroModeClose();
			bv->updateInset(this);
		}
		releaseMathCursor(bv);
	}
	generatePreview();
	bv->updateInset(this);
}


void InsetFormulaBase::getCursor(BufferView &, int & x, int & y) const
{
	mathcursor->getPos(x, y);
}


void InsetFormulaBase::getCursorPos(BufferView *, int & x, int & y) const
{
	// calling metrics here destroys the cached xo,yo positions e.g. in
	// MathParboxinset. And it would be too expensive anyway...
	//metrics(bv);
	if (!mathcursor) {
		lyxerr << "getCursorPos - should not happen";
		x = y = 0;
		return;
	}
	mathcursor->getPos(x, y);
	x = mathcursor->targetX();
	x -= xo_;
	y -= yo_;
	//lyxerr << "getCursorPos: " << x << ' ' << y << endl;
}


void InsetFormulaBase::fitInsetCursor(BufferView * bv) const
{
	if (!mathcursor)
		return;
	int x, y, asc, des;
	asc = 10;
	des = 2;
	//math_font_max_dim(font_, asc, des);
	getCursorPos(bv, x, y);
	//y += yo_;
	//lyxerr << "fitInsetCursor: x: " << x << " y: " << y << " yo: " << yo_ << endl;
	bv->fitLockedInsetCursor(x, y, asc, des);
}


void InsetFormulaBase::toggleInsetSelection(BufferView * bv)
{
	if (mathcursor)
		bv->updateInset(this);
}


vector<string> const InsetFormulaBase::getLabelList() const
{
  return vector<string>();
}


dispatch_result InsetFormulaBase::lfunMouseRelease(FuncRequest const & cmd)
{
	if (!mathcursor)
		return UNDISPATCHED;

	BufferView * bv = cmd.view();
	bv->updateInset(this);
	//lyxerr << "lfunMouseRelease: buttons: " << cmd.button() << endl;

	if (cmd.button() == mouse_button::button3) {
		// try to dispatch to enclosed insets first
		if (mathcursor->dispatch(cmd) == UNDISPATCHED) {
			// launch math panel for right mouse button
			lyxerr << "lfunMouseRelease: undispatched: " << cmd.button() << endl;
			bv->owner()->getDialogs().show("mathpanel");
		}
		return DISPATCHED;
	}

	if (cmd.button() == mouse_button::button2) {
		MathArray ar;
		asArray(bv->getClipboard(), ar);
		mathcursor->selClear();
		mathcursor->setPos(cmd.x + xo_, cmd.y + yo_);
		mathcursor->insert(ar);
		bv->updateInset(this);
		return DISPATCHED;
	}

	if (cmd.button() == mouse_button::button1) {
		// try to dispatch to enclosed insets first
		mathcursor->dispatch(cmd);
		cmd.view()->stuffClipboard(mathcursor->grabSelection());
		// try to set the cursor
		//delete mathcursor;
		//mathcursor = new MathCursor(this, x == 0);
		//metrics(bv);
		//mathcursor->setPos(x + xo_, y + yo_);
		return DISPATCHED;
	}

	return UNDISPATCHED;
}


dispatch_result InsetFormulaBase::lfunMousePress(FuncRequest const & cmd)
{
	BufferView * bv = cmd.view();
	//lyxerr << "lfunMousePress: buttons: " << cmd.button() << endl;

	if (!mathcursor || mathcursor->formula() != this) {
		lyxerr[Debug::MATHED] << "re-create cursor" << endl;
		releaseMathCursor(bv);
		mathcursor = new MathCursor(this, cmd.x == 0);
		//metrics(bv);
		mathcursor->setPos(cmd.x + xo_, cmd.y + yo_);
	}

	if (cmd.button() == mouse_button::button3) {
		mathcursor->dispatch(cmd);
		return DISPATCHED;
	}

	if (cmd.button() == mouse_button::button1) {
		first_x = cmd.x;
		first_y = cmd.y;
		mathcursor->selClear();
		mathcursor->setPos(cmd.x + xo_, cmd.y + yo_);
		mathcursor->dispatch(cmd);
		return DISPATCHED;
	}

	bv->updateInset(this);
	return DISPATCHED;
}


dispatch_result InsetFormulaBase::lfunMouseMotion(FuncRequest const & cmd)
{
	if (!mathcursor)
		return DISPATCHED;

	if (mathcursor->dispatch(FuncRequest(cmd)) != UNDISPATCHED)
		return DISPATCHED;

	// only select with button 1
	if (cmd.button() != mouse_button::button1)
		return DISPATCHED;

	if (abs(cmd.x - first_x) < 2 && abs(cmd.y - first_y) < 2)
		return DISPATCHED;

	first_x = cmd.x;
	first_y = cmd.y;

	if (!mathcursor->selection())
		mathcursor->selStart();

	BufferView * bv = cmd.view();
	mathcursor->setPos(cmd.x + xo_, cmd.y + yo_);
	bv->updateInset(this);
	return DISPATCHED;
}


dispatch_result InsetFormulaBase::localDispatch(FuncRequest const & cmd)
{
	//lyxerr << "InsetFormulaBase::localDispatch: act: " << cmd.action
	//	<< " arg: '" << cmd.argument
	//	<< " x: '" << cmd.x
	//	<< " y: '" << cmd.y
	//	<< "' button: " << cmd.button() << endl;

	BufferView * bv = cmd.view();

	// delete empty mathbox (LFUN_BACKSPACE and LFUN_DELETE)
	bool remove_inset = false;

	switch (cmd.action) {
		case LFUN_INSET_EDIT:
			lyxerr << "Called EDIT with '" << cmd.argument << "'\n";
			if (!bv->lockInset(this))
				lyxerr << "Cannot lock math inset in edit call!\n";
			releaseMathCursor(bv);
			if (!cmd.argument.empty()) {
				mathcursor = new MathCursor(this, cmd.argument == "left");
				//metrics(bv);
			} else {
				mathcursor = new MathCursor(this, true);
				//metrics(bv);
				mathcursor->setPos(cmd.x + xo_, cmd.y + yo_);
			}
			// if that is removed, we won't get the magenta box when entering an
			// inset for the first time
			bv->updateInset(this);
			return DISPATCHED;

		case LFUN_MOUSE_PRESS:
			//lyxerr << "Mouse single press\n";
			return lfunMousePress(cmd);
		case LFUN_MOUSE_MOTION:
			//lyxerr << "Mouse motion\n";
			return lfunMouseMotion(cmd);
		case LFUN_MOUSE_RELEASE:
			//lyxerr << "Mouse single release\n";
			return lfunMouseRelease(cmd);
		case LFUN_MOUSE_DOUBLE:
			//lyxerr << "Mouse double\n";
			return localDispatch(FuncRequest(LFUN_WORDSEL));
		default:
			break;
	}

	if (!mathcursor)
		return UNDISPATCHED;

	string argument    = cmd.argument;
	RESULT result      = DISPATCHED;
	bool sel           = false;
	bool was_macro     = mathcursor->inMacroMode();
	bool was_selection = mathcursor->selection();

	mathcursor->normalize();
	mathcursor->touch();

	switch (cmd.action) {

	case LFUN_MATH_MUTATE:
	case LFUN_MATH_DISPLAY:
	case LFUN_MATH_NUMBER:
	case LFUN_MATH_NONUMBER:
	case LFUN_CELL_SPLIT:
	case LFUN_BREAKLINE:
	case LFUN_DELETE_LINE_FORWARD:
	case LFUN_INSERT_LABEL:
	case LFUN_MATH_EXTERN:
	case LFUN_TABULAR_FEATURE:
	case LFUN_PASTESELECTION:
	case LFUN_MATH_LIMITS:
		bv->lockedInsetStoreUndo(Undo::EDIT);
		mathcursor->dispatch(cmd);
		break;

	case LFUN_RIGHTSEL:
		sel = true; // fall through...
	case LFUN_RIGHT:
		result = mathcursor->right(sel) ? DISPATCHED : FINISHED_RIGHT;
		//lyxerr << "calling scroll 20\n";
		//scroll(bv, 20);
		// write something to the minibuffer
		//bv->owner()->message(mathcursor->info());
		break;

	case LFUN_LEFTSEL:
		sel = true; // fall through
	case LFUN_LEFT:
		result = mathcursor->left(sel) ? DISPATCHED : FINISHED;
		break;

	case LFUN_UPSEL:
		sel = true; // fall through
	case LFUN_UP:
		result = mathcursor->up(sel) ? DISPATCHED : FINISHED_UP;
		break;

	case LFUN_DOWNSEL:
		sel = true; // fall through
	case LFUN_DOWN:
		result = mathcursor->down(sel) ? DISPATCHED : FINISHED_DOWN;
		break;

	case LFUN_WORDSEL:
		mathcursor->home(false);
		mathcursor->end(true);
		break;

	case LFUN_UP_PARAGRAPHSEL:
	case LFUN_UP_PARAGRAPH:
	case LFUN_DOWN_PARAGRAPHSEL:
	case LFUN_DOWN_PARAGRAPH:
		result = FINISHED;
		break;

	case LFUN_HOMESEL:
	case LFUN_WORDLEFTSEL:
		sel = true; // fall through
	case LFUN_HOME:
	case LFUN_WORDLEFT:
		result = mathcursor->home(sel) ? DISPATCHED : FINISHED;
		break;

	case LFUN_ENDSEL:
	case LFUN_WORDRIGHTSEL:
		sel = true; // fall through
	case LFUN_END:
	case LFUN_WORDRIGHT:
		result = mathcursor->end(sel) ? DISPATCHED : FINISHED_RIGHT;
		break;

	case LFUN_PRIORSEL:
	case LFUN_PRIOR:
	case LFUN_BEGINNINGBUFSEL:
	case LFUN_BEGINNINGBUF:
		result = FINISHED;
		break;

	case LFUN_NEXTSEL:
	case LFUN_NEXT:
	case LFUN_ENDBUFSEL:
	case LFUN_ENDBUF:
		result = FINISHED_RIGHT;
		break;

	case LFUN_CELL_FORWARD:
		mathcursor->idxNext();
		break;

	case LFUN_CELL_BACKWARD:
		mathcursor->idxPrev();
		break;

	case LFUN_DELETE_WORD_BACKWARD:
	case LFUN_BACKSPACE:
		bv->lockedInsetStoreUndo(Undo::EDIT);
		if (!mathcursor->backspace()) {
			result = FINISHED;
			remove_inset = true;
		}
		break;

	case LFUN_DELETE_WORD_FORWARD:
	case LFUN_DELETE:
		bv->lockedInsetStoreUndo(Undo::EDIT);
		if (!mathcursor->erase()) {
			result = FINISHED;
			remove_inset = true;
		}
		break;

	//    case LFUN_GETXY:
	//      sprintf(dispatch_buffer, "%d %d",);
	//      dispatch_result = dispatch_buffer;
	//      break;
	case LFUN_SETXY: {
		lyxerr << "LFUN_SETXY broken!\n";
		int x = 0;
		int y = 0;
		istringstream is(cmd.argument.c_str());
		is >> x >> y;
		mathcursor->setPos(x, y);
		break;
	}

	case LFUN_PASTE: {
		int n = 0;
		istringstream is(cmd.argument.c_str());
		is >> n;
		if (was_macro)
			mathcursor->macroModeClose();
		bv->lockedInsetStoreUndo(Undo::EDIT);
		mathcursor->selPaste(n);
		break;
	}

	case LFUN_CUT:
		bv->lockedInsetStoreUndo(Undo::DELETE);
		mathcursor->selCut();
		break;

	case LFUN_COPY:
		mathcursor->selCopy();
		break;


	// Special casing for superscript in case of LyX handling
	// dead-keys:
	case LFUN_CIRCUMFLEX:
		if (cmd.argument.empty()) {
			// do superscript if LyX handles
			// deadkeys
			bv->lockedInsetStoreUndo(Undo::EDIT);
			mathcursor->script(true);
		}
		break;

	case LFUN_UMLAUT:
	case LFUN_ACUTE:
	case LFUN_GRAVE:
	case LFUN_BREVE:
	case LFUN_DOT:
	case LFUN_MACRON:
	case LFUN_CARON:
	case LFUN_TILDE:
	case LFUN_CEDILLA:
	case LFUN_CIRCLE:
	case LFUN_UNDERDOT:
	case LFUN_TIE:
	case LFUN_OGONEK:
	case LFUN_HUNG_UMLAUT:
		break;

	//  Math fonts
	case LFUN_BOLD:         handleFont(bv, cmd.argument, "mathbf"); break;
	case LFUN_SANS:         handleFont(bv, cmd.argument, "mathsf"); break;
	case LFUN_EMPH:         handleFont(bv, cmd.argument, "mathcal"); break;
	case LFUN_ROMAN:        handleFont(bv, cmd.argument, "mathrm"); break;
	case LFUN_CODE:         handleFont(bv, cmd.argument, "texttt"); break;
	case LFUN_FRAK:         handleFont(bv, cmd.argument, "mathfrak"); break;
	case LFUN_ITAL:         handleFont(bv, cmd.argument, "mathit"); break;
	case LFUN_NOUN:         handleFont(bv, cmd.argument, "mathbb"); break;
	case LFUN_FREEFONT_APPLY:  handleFont(bv, cmd.argument, "textrm"); break;
	case LFUN_DEFAULT:      handleFont(bv, cmd.argument, "textnormal"); break;

	case LFUN_MATH_MODE:
		if (mathcursor->currentMode() == MathInset::TEXT_MODE)
			mathcursor->niceInsert(MathAtom(new MathHullInset("simple")));
		else
			handleFont(bv, cmd.argument, "textrm");
		//bv->owner()->message(_("math text mode toggled"));
		break;

	case LFUN_MATH_SIZE:
#if 0
		if (!arg.empty()) {
			bv->lockedInsetStoreUndo(Undo::EDIT);
			mathcursor->setSize(arg);
		}
#endif
		break;

	case LFUN_INSERT_MATRIX: {
		bv->lockedInsetStoreUndo(Undo::EDIT);
		unsigned int m = 1;
		unsigned int n = 1;
		string v_align;
		string h_align;
		istringstream is(STRCONV(argument));
		is >> m >> n >> v_align >> h_align;
		m = max(1u, m);
		n = max(1u, n);
		v_align += 'c';
		mathcursor->niceInsert(
			MathAtom(new MathArrayInset("array", m, n, v_align[0], h_align)));
		break;
	}

	case LFUN_SUPERSCRIPT:
	case LFUN_SUBSCRIPT:
	{
		bv->lockedInsetStoreUndo(Undo::EDIT);
		mathcursor->script(cmd.action == LFUN_SUPERSCRIPT);
		break;
	}

	case LFUN_MATH_DELIM:
	{
		//lyxerr << "formulabase::LFUN_MATH_DELIM, arg: '" << arg << "'\n";
		string ls;
		string rs = split(cmd.argument, ls, ' ');
		// Reasonable default values
		if (ls.empty())
			ls = '(';
		if (rs.empty())
			rs = ')';

		bv->lockedInsetStoreUndo(Undo::EDIT);
		mathcursor->handleNest(MathAtom(new MathDelimInset(ls, rs)));
		break;
	}

	case LFUN_SPACE_INSERT:
	case LFUN_MATH_SPACE:
		bv->lockedInsetStoreUndo(Undo::EDIT);
		mathcursor->insert(MathAtom(new MathSpaceInset(",")));
		break;

	case LFUN_UNDO:
		bv->owner()->message(_("Invalid action in math mode!"));
		break;


	case LFUN_EXEC_COMMAND:
		result = UNDISPATCHED;
		break;

	case LFUN_INSET_ERT:
		// interpret this as if a backslash was typed
		bv->lockedInsetStoreUndo(Undo::EDIT);
		mathcursor->interpret('\\');
		break;

	case LFUN_BREAKPARAGRAPH:
	case LFUN_BREAKPARAGRAPHKEEPLAYOUT:
	case LFUN_BREAKPARAGRAPH_SKIP:
		argument = "\n";
		// fall through

// FIXME: We probably should swap parts of "math-insert" and "self-insert"
// handling such that "self-insert" works on "arbitrary stuff" too, and
// math-insert only handles special math things like "matrix".
	case LFUN_INSERT_MATH:
		bv->lockedInsetStoreUndo(Undo::EDIT);
		mathcursor->niceInsert(argument);
		break;

	case -1:
	case LFUN_SELFINSERT:
		if (!argument.empty()) {
			bv->lockedInsetStoreUndo(Undo::EDIT);
			if (argument.size() == 1)
				result = mathcursor->interpret(argument[0]) ? DISPATCHED : FINISHED_RIGHT;
			else
				mathcursor->insert(argument);
		}
		break;

	case LFUN_ESCAPE:
		if (mathcursor->selection())
			mathcursor->selClear();
		else
			result = UNDISPATCHED;
		break;

	case LFUN_INSET_TOGGLE:
		mathcursor->insetToggle();
		break;

	case LFUN_DIALOG_SHOW:
		if (argument == "mathpanel")
			result = UNDISPATCHED;
		break;

	case LFUN_DIALOG_SHOW_NEW_INSET: {
		string const & name = argument;
		string data;
		if (name == "ref") {
			RefInset tmp(name);
			data = tmp.createDialogStr(name);
		}

		if (data.empty())
			result = UNDISPATCHED;
		else {
			bv->owner()->getDialogs().show(name, data, 0);
		}
	}
	break;

	case LFUN_INSET_APPLY: {
		string const name = cmd.getArg(0);
		InsetBase * base =
			bv->owner()->getDialogs().getOpenInset(name);

		if (base) {
			FuncRequest fr(bv, LFUN_INSET_MODIFY, cmd.argument);
			result = base->localDispatch(fr);
		} else {
			MathArray ar;
			if (createMathInset_fromDialogStr(cmd.argument, ar)) {
				mathcursor->insert(ar);
				result = DISPATCHED;
			} else {
				result = UNDISPATCHED;
			}
		}
	}
	break;

	default:
		result = UNDISPATCHED;
	}

	if (result == DISPATCHED)
		bv->updateInset(this);

	mathcursor->normalize();
	mathcursor->touch();

	Assert(mathcursor);

	if (mathcursor->selection() || was_selection)
		toggleInsetSelection(bv);

	if (result == DISPATCHED || result == DISPATCHED_NOUPDATE ||
	    result == UNDISPATCHED) {
		fitInsetCursor(bv);
		revealCodes(bv);
		cmd.view()->stuffClipboard(mathcursor->grabSelection());
	} else {
		releaseMathCursor(bv);
		bv->unlockInset(this);
		if (remove_inset)
			bv->owner()->dispatch(FuncRequest(LFUN_DELETE));
	}

	return result;  // original version
}


void InsetFormulaBase::revealCodes(BufferView * bv) const
{
	if (!mathcursor)
		return;
	bv->owner()->message(mathcursor->info());

#if 0
	// write something to the minibuffer
	// translate to latex
	mathcursor->markInsert();
	ostringstream os;
	write(NULL, os);
	string str = os.str();
	mathcursor->markErase();
	string::size_type pos = 0;
	string res;
	for (string::iterator it = str.begin(); it != str.end(); ++it) {
		if (*it == '\n')
			res += ' ';
		else if (*it == '\0') {
			res += "  -X-  ";
			pos = it - str.begin();
		}
		else
			res += *it;
	}
	if (pos > 30)
		res = res.substr(pos - 30);
	if (res.size() > 60)
		res = res.substr(0, 60);
	bv->owner()->message(res);
#endif
}


Inset::Code InsetFormulaBase::lyxCode() const
{
	return Inset::MATH_CODE;
}


int InsetFormulaBase::ylow() const
{
	return yo_ - dim_.asc;
}


int InsetFormulaBase::yhigh() const
{
	return yo_ + dim_.des;
}


int InsetFormulaBase::xlow() const
{
	return xo_;
}


int InsetFormulaBase::xhigh() const
{
	return xo_ + dim_.wid;
}


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


bool InsetFormulaBase::searchForward(BufferView * bv, string const & str,
				     bool, bool)
{
#ifdef WITH_WARNINGS
#warning pretty ugly
#endif
	static InsetFormulaBase * lastformula = 0;
	static MathIterator current = MathIterator(ibegin(par().nucleus()));
	static MathArray ar;
	static string laststr;

	if (lastformula != this || laststr != str) {
		//lyxerr << "reset lastformula to " << this << "\n";
		lastformula = this;
		laststr = str;
		current	= ibegin(par().nucleus());
		ar.clear();
		mathed_parse_cell(ar, str);
	} else {
		++current;
	}
	//lyxerr << "searching '" << str << "' in " << this << ar << endl;

	for (MathIterator it = current; it != iend(par().nucleus()); ++it) {
		if (it.cell().matchpart(ar, it.back().pos_)) {
			bv->unlockInset(bv->theLockingInset());
			if (!bv->lockInset(this)) {
				lyxerr << "Cannot lock inset" << endl;
				return false;
			}
			delete mathcursor;
			mathcursor = new MathCursor(this, true);
			//metrics(bv);
			mathcursor->setSelection(it, ar.size());
			current = it;
			it.jump(ar.size());
			bv->updateInset(this);
			return true;
		}
	}

	//lyxerr << "not found!\n";
	lastformula = 0;
	return false;
}


bool InsetFormulaBase::searchBackward(BufferView * bv, string const & what,
				      bool a, bool b)
{
	lyxerr[Debug::MATHED] << "searching backward not implemented in mathed\n";
	return searchForward(bv, what, a, b);
}


bool InsetFormulaBase::display() const
{
	return par()->asHullInset() && par()->asHullInset()->display();
}


string InsetFormulaBase::selectionAsString() const
{
	return mathcursor ? mathcursor->grabSelection() : string();
}

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


void mathDispatchCreation(FuncRequest const & cmd, bool display)
{
	BufferView * bv = cmd.view();
	// use selection if available..
	//string sel;
	//if (action == LFUN_MATH_IMPORT_SELECTION)
	//	sel = "";
	//else

	string sel = bv->getLyXText()->selectionAsString(bv->buffer(), false);

	if (sel.empty()) {
		InsetFormula * f = new InsetFormula(bv);
		if (openNewInset(bv, f)) {
			bv->theLockingInset()->
				localDispatch(FuncRequest(bv, LFUN_MATH_MUTATE, "simple"));
			// don't do that also for LFUN_MATH_MODE unless you want end up with
			// always changing to mathrm when opening an inlined inset
			// -- I really hate "LyXfunc overloading"...
			if (display)
				f->localDispatch(FuncRequest(bv, LFUN_MATH_DISPLAY));
			f->localDispatch(FuncRequest(bv, LFUN_INSERT_MATH, cmd.argument));
		}
	} else {
		// create a macro if we see "\\newcommand" somewhere, and an ordinary
		// formula otherwise
		InsetFormulaBase * f;
		if (sel.find("\\newcommand") == string::npos &&
				sel.find("\\def") == string::npos)
			f = new InsetFormula(sel);
		else
			f = new InsetFormulaMacro(sel);
		bv->getLyXText()->cutSelection(true, false);
		openNewInset(bv, f);
	}
	cmd.message(N_("Math editor mode"));
}


void mathDispatch(FuncRequest const & cmd)
{
	BufferView * bv = cmd.view();
	if (!bv->available())
		return;

	switch (cmd.action) {

		case LFUN_MATH_DISPLAY:
			mathDispatchCreation(cmd, true);
			break;

		case LFUN_MATH_MODE:
			mathDispatchCreation(cmd, false);
			break;

		case LFUN_MATH_IMPORT_SELECTION:
			mathDispatchCreation(cmd, false);
			break;

		case LFUN_MATH_MACRO:
			if (cmd.argument.empty())
				cmd.errorMessage(N_("Missing argument"));
			else {
				string s = cmd.argument;
				string const s1 = token(s, ' ', 1);
				int const na = s1.empty() ? 0 : atoi(s1);
				openNewInset(bv, new InsetFormulaMacro(token(s, ' ', 0), na));
			}
			break;

		case LFUN_INSERT_MATH:
		case LFUN_INSERT_MATRIX:
		case LFUN_MATH_DELIM: {
			InsetFormula * f = new InsetFormula(bv);
			if (openNewInset(bv, f)) {
				bv->theLockingInset()->
					localDispatch(FuncRequest(bv, LFUN_MATH_MUTATE, "simple"));
				bv->theLockingInset()->localDispatch(cmd);
			}
			break;
		}

		default:
			break;
	}
}