lyx_mirror/src/mathed/formula.C

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/*
* File: formula.C
* Purpose: Implementation of formula inset
* Author: Alejandro Aguilar Sierra <asierra@servidor.unam.mx>
* Created: January 1996
* Description: Allows the edition of math paragraphs inside Lyx.
*
* 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.
*/
#ifdef __GNUG__
#pragma implementation
#endif
#include <config.h>
#include <fstream>
#include "formula.h"
#include "commandtags.h"
#include "math_cursor.h"
#include "math_parser.h"
#include "math_charinset.h"
#include "lyx_main.h"
#include "BufferView.h"
#include "gettext.h"
#include "debug.h"
#include "lyx_gui_misc.h"
#include "support/LOstream.h"
#include "support/LAssert.h"
#include "support/lyxlib.h"
#include "support/syscall.h"
#include "support/lstrings.h"
#include "LyXView.h"
#include "Painter.h"
#include "lyxrc.h"
#include "math_matrixinset.h"
#include "mathed/support.h"
using std::ostream;
using std::ifstream;
using std::istream;
using std::pair;
using std::endl;
using std::vector;
namespace {
void stripFromLastEqualSign(MathArray & ar)
{
// find position of last '=' in the array
MathArray::size_type pos = ar.size();
for (MathArray::const_iterator it = ar.begin(); it != ar.end(); ++it)
if ((*it)->getChar() == '=')
pos = it - ar.begin();
// delete everything behind this position
ar.erase(pos, ar.size());
}
}
InsetFormula::InsetFormula()
: par_(MathAtom(new MathMatrixInset))
{}
InsetFormula::InsetFormula(MathInsetTypes t)
: par_(MathAtom(new MathMatrixInset(t)))
{}
InsetFormula::InsetFormula(string const & s)
{
if (s.size()) {
bool res = mathed_parse_normal(par_, s);
if (!res)
res = mathed_parse_normal(par_, "$" + s + "$");
if (!res) {
lyxerr << "cannot interpret '" << s << "' as math\n";
par_ = MathAtom(new MathMatrixInset(LM_OT_SIMPLE));
}
}
metrics();
}
Inset * InsetFormula::clone(Buffer const &, bool) const
{
return new InsetFormula(*this);
}
void InsetFormula::write(Buffer const * buf, ostream & os) const
{
os << "Formula ";
latex(buf, os, false, false);
}
int InsetFormula::latex(Buffer const * buf, ostream & os, bool fragil, bool)
const
{
MathWriteInfo wi(buf, os, fragil);
par_->write(wi);
return 1;
}
int InsetFormula::ascii(Buffer const * buf, ostream & os, int) const
{
MathWriteInfo wi(buf, os, false);
par_->write(wi);
return 1;
}
int InsetFormula::linuxdoc(Buffer const * buf, ostream & os) const
{
return ascii(buf, os, 0);
}
int InsetFormula::docbook(Buffer const * buf, ostream & os) const
{
return ascii(buf, os, 0);
}
void InsetFormula::read(Buffer const *, LyXLex & lex)
{
mathed_parse_normal(par_, lex);
metrics();
}
void InsetFormula::draw(BufferView * bv, LyXFont const & font,
int y, float & xx, bool) const
{
int x = int(xx) - 1;
y -= 2;
Painter & pain = bv->painter();
metrics(bv, font);
int w = par_->width();
int h = par_->height();
int a = par_->ascent();
pain.fillRectangle(x, y - a, w, h, LColor::mathbg);
if (mathcursor && mathcursor->formula() == this) {
mathcursor->drawSelection(pain);
pain.rectangle(x, y - a, w, h, LColor::mathframe);
}
par_->draw(pain, x, y);
xx += par_->width();
setCursorVisible(false);
}
vector<string> const InsetFormula::getLabelList() const
{
return mat()->getLabelList();
}
UpdatableInset::RESULT
InsetFormula::localDispatch(BufferView * bv, kb_action action,
string const & arg)
{
RESULT result = DISPATCHED;
switch (action) {
case LFUN_BREAKLINE:
bv->lockedInsetStoreUndo(Undo::INSERT);
mathcursor->breakLine();
mathcursor->normalize();
updateLocal(bv, true);
break;
case LFUN_MATH_NUMBER:
{
//lyxerr << "toggling all numbers\n";
if (display()) {
bv->lockedInsetStoreUndo(Undo::INSERT);
bool old = mat()->numberedType();
for (MathInset::row_type row = 0; row < par_->nrows(); ++row)
mat()->numbered(row, !old);
bv->owner()->message(old ? _("No number") : _("Number"));
updateLocal(bv, true);
}
break;
}
case LFUN_MATH_NONUMBER:
{
//lyxerr << "toggling line number\n";
if (display()) {
bv->lockedInsetStoreUndo(Undo::INSERT);
MathCursor::row_type row = mathcursor->row();
bool old = mat()->numbered(row);
bv->owner()->message(old ? _("No number") : _("Number"));
mat()->numbered(row, !old);
updateLocal(bv, true);
}
break;
}
case LFUN_INSERT_LABEL:
{
bv->lockedInsetStoreUndo(Undo::INSERT);
MathCursor::row_type row = mathcursor->row();
string old_label = mat()->label(row);
string new_label = arg;
if (new_label.empty()) {
string const default_label =
(lyxrc.label_init_length >= 0) ? "eq:" : "";
pair<bool, string> const res = old_label.empty()
? askForText(_("Enter new label to insert:"), default_label)
: askForText(_("Enter label:"), old_label);
lyxerr << "res: " << res.first << " - '" << res.second << "'\n";
if (!res.first)
break;
new_label = frontStrip(strip(res.second));
}
//if (new_label == old_label)
// break; // Nothing to do
if (!new_label.empty()) {
lyxerr << "setting label to '" << new_label << "'\n";
mat()->numbered(row, true);
}
if (!new_label.empty() && bv->ChangeRefsIfUnique(old_label, new_label))
bv->redraw();
mat()->label(row, new_label);
updateLocal(bv, true);
break;
}
case LFUN_MATH_EXTERN:
bv->lockedInsetStoreUndo(Undo::EDIT);
handleExtern(arg);
// re-compute inset dimension
metrics(bv);
updateLocal(bv, true);
break;
case LFUN_MATH_MUTATE:
{
bv->lockedInsetStoreUndo(Undo::EDIT);
int x;
int y;
mathcursor->getPos(x, y);
mat()->mutate(arg);
mathcursor->setPos(x, y);
mathcursor->normalize();
updateLocal(bv, true);
break;
}
case LFUN_MATH_DISPLAY:
{
int x;
int y;
mathcursor->getPos(x, y);
if (mat()->getType() == LM_OT_SIMPLE)
mat()->mutate(LM_OT_EQUATION);
else
mat()->mutate(LM_OT_SIMPLE);
mathcursor->setPos(x, y);
mathcursor->normalize();
updateLocal(bv, true);
break;
}
case LFUN_PASTESELECTION:
{
string const clip = bv->getClipboard();
if (!clip.empty())
mathed_parse_normal(par_, clip);
break;
}
case LFUN_MATH_COLUMN_INSERT:
{
if (mat()->getType() == LM_OT_ALIGN)
mat()->mutate(LM_OT_ALIGNAT);
mat()->addCol(mat()->ncols());
mathcursor->normalize();
updateLocal(bv, true);
}
default:
result = InsetFormulaBase::localDispatch(bv, action, arg);
}
return result;
}
void InsetFormula::handleExtern(const string & arg)
{
// where are we?
if (!mathcursor)
return;
MathArray & ar = mathcursor->cursor().cell();
// parse args
string lang;
string extra;
istringstream iss(arg.c_str());
iss >> lang >> extra;
if (extra.empty())
extra = "noextra";
// strip last '=' and everything behind
stripFromLastEqualSign(ar);
// create normalized expression
//string outfile = lyx::tempName("maple.out");
string outfile = "/tmp/lyx2" + lang + ".out";
ostringstream os;
os << "[" << extra << ' ';
ar.writeNormal(os);
os << "]";
string code = os.str().c_str();
// run external sript
string script = "lyx2" + arg + " '" + code + "' " + outfile;
lyxerr << "calling: " << script << endl;
Systemcalls cmd(Systemcalls::System, script, 0);
// append a '='
ar.push_back(MathAtom(new MathCharInset('=')));
// append result
ifstream is(outfile.c_str());
mathed_parse_cell(ar, is);
mathcursor->end();
}
bool InsetFormula::display() const
{
return mat()->getType() != LM_OT_SIMPLE;
}
MathMatrixInset const * InsetFormula::mat() const
{
lyx::Assert(par_->asMatrixInset());
return par_->asMatrixInset();
}
MathMatrixInset * InsetFormula::mat()
{
lyx::Assert(par_->asMatrixInset());
return par_->asMatrixInset();
}
Inset::Code InsetFormula::lyxCode() const
{
return Inset::MATH_CODE;
}
void InsetFormula::validate(LaTeXFeatures & features) const
{
par_->validate(features);
}
bool InsetFormula::insetAllowed(Inset::Code code) const
{
return code == Inset::LABEL_CODE && display();
}
int InsetFormula::ascent(BufferView *, LyXFont const &) const
{
return par_->ascent() + 2;
}
int InsetFormula::descent(BufferView *, LyXFont const &) const
{
return par_->descent() - 2;
}
int InsetFormula::width(BufferView * bv, LyXFont const & font) const
{
metrics(bv, font);
return par_->width();
}
MathInsetTypes InsetFormula::getType() const
{
return mat()->getType();
}