some visual support for \lefteqn

fix some writeNormal() issues


git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@2895 a592a061-630c-0410-9148-cb99ea01b6c8

src/mathed/ChangeLog

@@ -1,4 +1,12 @@
 
+2001-10-17  André Pönitz  <poenitz@gmx.net>
+
+	* formula.C:
+	* array.C: add missing/broken  writeNormal()
+
+	* math_lefteqn.[Ch]: some visual support for \lefteqn
+	
+
 2001-10-10  André Pönitz  <poenitz@gmx.net>
 
 	* math_cursor.C: introduce dummy "inner" position "between"

src/mathed/Makefile.am

@@ -54,6 +54,8 @@ libmathed_la_SOURCES = \
 	math_inset.h \
 	math_kerninset.C \
 	math_kerninset.h \
+	math_lefteqninset.C \
+	math_lefteqninset.h \
 	math_macro.C \
 	math_macro.h \
 	math_macroarg.C \

src/mathed/array.C

@@ -201,12 +201,10 @@ void MathArray::write(ostream & os, bool fragile) const
 
 void MathArray::writeNormal(ostream & os) const
 {
-	if (empty()) {
-		os << "[par] ";
-		return;
-	}
-
-	write(os, true);
+	os << "[par ";
+	for (const_iterator it = begin(); it != end(); ++it)
+		(*it)->writeNormal(os);
+	os << "]";
 }
 
 

src/mathed/formula.C

@@ -24,6 +24,7 @@
 #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"
@@ -48,6 +49,7 @@ using std::endl;
 using std::vector;
 
 
+
 InsetFormula::InsetFormula()
 	: par_(MathAtom(new MathMatrixInset))
 {}
@@ -302,17 +304,39 @@ InsetFormula::localDispatch(BufferView * bv, kb_action action,
 
 void InsetFormula::handleExtern(const string & arg, BufferView *)
 {
+	// where are we?
+	MathArray & ar = mathcursor->cursor().cell();
+
+	// find position of last '=' in the array for handleExtern
+	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());
+
+	// create normalized expression
 	//string outfile = lyx::tempName("maple.out");
 	string outfile = "/tmp/lyx2" + arg + ".out";
 	ostringstream os;
-	mat()->writeNormal(os); 
+	ar.writeNormal(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_normal(par_, is);
+	mathed_parse_cell(ar, is);
+	mathcursor->end();
+
+	// re-compute inset dimension
 	metrics();
 }
 

src/mathed/math_cursor.h

@@ -23,6 +23,7 @@
 
 #include "math_defs.h"
 #include "math_inset.h"
+#include "LString.h"
 
 class MathInset;
 class MathAtom;

src/mathed/math_factory.C

@@ -8,6 +8,7 @@
 #include "math_funcliminset.h"
 #include "math_fracinset.h"
 #include "math_kerninset.h"
+#include "math_lefteqninset.h"
 #include "math_macro.h"
 #include "math_macrotable.h"
 #include "math_macroarg.h"
@@ -49,6 +50,8 @@ MathAtom createMathInset(latexkeys const * l)
 		return MathAtom(new MathFracInset(true));
 	case LM_TK_NOT:
 		return MathAtom(new MathNotInset);
+	case LM_TK_LEFTEQN:
+		return MathAtom(new MathLefteqnInset);
 	case LM_TK_SQRT:
 		return MathAtom(new MathSqrtInset);
 	case LM_TK_ROOT:

src/mathed/math_gridinset.C

@@ -276,6 +276,22 @@ void MathGridInset::write(std::ostream & os, bool fragile) const
 }
 
 
+void MathGridInset::writeNormal(std::ostream & os) const
+{
+	os << "[grid ";
+	for (row_type row = 0; row < nrows(); ++row) {
+		os << "[row ";
+		for (col_type col = 0; col < ncols(); ++col) {
+			os << "[cell ";
+			cell(index(row, col)).writeNormal(os);
+			os << "]";
+		}
+		os << "]";
+	}
+	os << "]";
+}
+
+
 string MathGridInset::eolString(row_type row) const
 {
 	if (row + 1 == nrows())	

src/mathed/math_gridinset.h

@@ -66,6 +66,8 @@ public:
 	///
 	void write(std::ostream &, bool fragile) const;
 	///
+	void writeNormal(std::ostream &) const;
+	///
 	void metrics(MathStyles st) const;
 	///
 	void draw(Painter &, int x, int y) const;

src/mathed/math_hash.C

@@ -75,6 +75,7 @@ latexkeys_a wordlist_array[] =
 	{"ker",  LM_TK_FUNC, 0},
 	{"kern",  LM_TK_KERN, 0},
 	{"label",  LM_TK_LABEL, 0},
+	{"lefteqn",  LM_TK_LEFTEQN, 1},
 	{"ldots",  LM_TK_DOTS, 0},
 	{"left",  LM_TK_LEFT, 0},
 	{"lg",  LM_TK_FUNC, 0},

src/mathed/math_inset.C

@@ -215,7 +215,9 @@ void MathInset::userSetSize(MathStyles sz)
 
 void MathInset::writeNormal(std::ostream & os) const
 {
-	os << "[unknown] ";
+	os << "[unknown ";
+	write(os, false);
+	os << "] ";
 }
 
 

src/mathed/math_lefteqninset.C

@@ -0,0 +1,56 @@
+#ifdef __GNUG__
+#pragma implementation
+#endif
+
+#include "math_lefteqninset.h"
+#include "support/LOstream.h"
+#include "LColor.h"
+#include "Painter.h"
+#include "math_cursor.h"
+
+
+MathLefteqnInset::MathLefteqnInset()
+	: MathNestInset(1)
+{}
+
+
+MathInset * MathLefteqnInset::clone() const
+{
+	return new MathLefteqnInset(*this);
+}
+
+
+void MathLefteqnInset::draw(Painter & pain, int x, int y) const
+{
+	xcell(0).draw(pain, x + 2, y);
+	if (mathcursor && mathcursor->isInside(this)) {
+		pain.rectangle(x, y - ascent(), xcell(0).width(), height(),
+			LColor::mathframe);
+	}
+}
+
+
+void MathLefteqnInset::write(std::ostream & os, bool fragile) const
+{
+	os << "\\lefteqn{";
+	cell(0).write(os, fragile);
+	os << "}";
+}
+
+
+void MathLefteqnInset::writeNormal(std::ostream & os) const
+{
+	os << "[lefteqn ";
+	cell(0).write(os, false);
+	os << "] ";
+}
+
+
+void MathLefteqnInset::metrics(MathStyles st) const
+{
+	MathNestInset::metrics(st);
+	size_    = st;
+	ascent_  = xcell(0).ascent() + 2;
+	descent_ = xcell(0).descent() + 2;
+	width_   = 4;
+}

src/mathed/math_lefteqninset.h

@@ -0,0 +1,28 @@
+// -*- C++ -*-
+#ifndef MATH_LEFTEQNINSET_H
+#define MATH_LEFTEQNINSET_H
+
+#include "math_nestinset.h"
+
+#ifdef __GNUG__
+#pragma interface
+#endif
+
+/// The \kern primitive
+
+class MathLefteqnInset : public MathNestInset {
+public:
+	///
+	MathLefteqnInset();
+	///
+	MathInset * clone() const;
+	///
+	void draw(Painter &, int x, int y) const;
+	///
+	void write(std::ostream &, bool fragile) const;
+	///
+	void writeNormal(std::ostream &) const;
+	///
+	void metrics(MathStyles st) const;
+};
+#endif

src/mathed/math_macrotable.C

@@ -13,8 +13,6 @@
 #include "debug.h"
 #include "support.h" // math_font_available
 
-MathArray mathed_parse_cell(string const &);
-
 
 MathMacroTable::table_type MathMacroTable::macro_table;
 
@@ -49,7 +47,7 @@ MathAtom & MathMacroTable::provide(string const & name)
 void MathMacroTable::create(string const & name, int na, string const & text)
 {
 	MathAtom t(new MathMacroTemplate(name, na));
-	t->cell(0) = mathed_parse_cell(text);
+	mathed_parse_cell(t->cell(0), text);
 	macro_table[name] = t;
 }
 

src/mathed/math_matrixinset.C

@@ -14,40 +14,71 @@
 
 namespace {
 
-
-int getCols(MathInsetTypes type)
-{
-	switch (type) {
-		case LM_OT_EQNARRAY:
-			return 3;
-		case LM_OT_ALIGN:
-		case LM_OT_ALIGNAT:
-		case LM_OT_XALIGNAT:
-		case LM_OT_XXALIGNAT:
-			return 2;
-		default:;
+	int getCols(MathInsetTypes type)
+	{
+		switch (type) {
+			case LM_OT_EQNARRAY:
+				return 3;
+			case LM_OT_ALIGN:
+			case LM_OT_ALIGNAT:
+			case LM_OT_XALIGNAT:
+			case LM_OT_XXALIGNAT:
+				return 2;
+			default:;
+		}
+		return 1;
 	}
-	return 1;
-}
 
 
-// returns position of first relation operator in the array
-// used for "intelligent splitting"
-int firstRelOp(MathArray const & array)
-{
-	for (MathArray::const_iterator it = array.begin(); it != array.end(); ++it)
-		if ((*it)->isRelOp())
-			return it - array.begin();
-	return array.size();
-}
+	// returns position of first relation operator in the array
+	// used for "intelligent splitting"
+	int firstRelOp(MathArray const & ar)
+	{
+		for (MathArray::const_iterator it = ar.begin(); it != ar.end(); ++it)
+			if ((*it)->isRelOp())
+				return it - ar.begin();
+		return ar.size();
+	}
 
 
-char const * star(bool numbered)
-{
-	return numbered ? "" : "*";
-}
+	char const * star(bool numbered)
+	{
+		return numbered ? "" : "*";
+	}
 
-}
+	MathInsetTypes typecode(string const & s)
+	{
+		if (s == "equation")  return LM_OT_EQUATION;
+		if (s == "display")   return LM_OT_EQUATION;
+		if (s == "eqnarray")  return LM_OT_EQNARRAY;
+		if (s == "align")     return LM_OT_ALIGN;
+		if (s == "alignat")   return LM_OT_ALIGNAT;
+		if (s == "xalignat")  return LM_OT_XALIGNAT;
+		if (s == "xxalignat") return LM_OT_XXALIGNAT;
+		if (s == "multline")  return LM_OT_MULTLINE;
+		if (s == "gather")    return LM_OT_GATHER;
+		return LM_OT_SIMPLE;
+	}	
+
+
+	string normalName(MathInsetTypes t)
+	{
+		switch (t) {
+			case LM_OT_EQUATION:  return "equation";
+			case LM_OT_EQNARRAY:  return "eqnarray";
+			case LM_OT_ALIGN:     return "align";
+			case LM_OT_ALIGNAT:   return "alignat";
+			case LM_OT_XALIGNAT:  return "xalignat";
+			case LM_OT_XXALIGNAT: return "xxalignat";
+			case LM_OT_MULTLINE:  return "multline";
+			case LM_OT_GATHER:    return "gather";
+			case LM_OT_SIMPLE:    return "simple";
+			default: break;
+		}
+		return "unknown";
+	}	
+
+} // end anon namespace
 
 
 MathMatrixInset::MathMatrixInset()
@@ -180,6 +211,15 @@ void MathMatrixInset::write(std::ostream & os, bool fragile) const
 }
 
 
+void MathMatrixInset::writeNormal(std::ostream & os) const
+{
+	os << "[formula " << normalName(getType()) << " ";
+	MathGridInset::writeNormal(os);
+	os << "] ";
+}
+
+
+
 string MathMatrixInset::label(row_type row) const
 {
 	return label_[row];
@@ -434,32 +474,6 @@ string MathMatrixInset::nicelabel(row_type row) const
 }
 
 
-namespace {
-	MathInsetTypes typecode(string const & s)
-	{
-		if (s == "equation")
-			return LM_OT_EQUATION;
-		if (s == "display")
-			return LM_OT_EQUATION;
-		if (s == "eqnarray")
-			return LM_OT_EQNARRAY;
-		if (s == "align")
-			return LM_OT_ALIGN;
-		if (s == "alignat")
-			return LM_OT_ALIGN;
-		if (s == "xalignat")
-			return LM_OT_XALIGNAT;
-		if (s == "xxalignat")
-			return LM_OT_XXALIGNAT;
-		if (s == "multline")
-			return LM_OT_MULTLINE;
-		if (s == "gather")
-			return LM_OT_GATHER;
-		return LM_OT_SIMPLE;
-	}	
-}
-
-
 void MathMatrixInset::mutate(string const & newtype)
 {
 	if (newtype == "dump") {

src/mathed/math_matrixinset.h

@@ -29,6 +29,8 @@ public:
 	///
 	void write(std::ostream &, bool fragile) const;
 	///
+	void writeNormal(std::ostream &) const;
+	///
 	void metrics(MathStyles st) const;
 	///
 	void draw(Painter &, int x, int y) const;

src/mathed/math_parser.C

@@ -954,14 +954,16 @@ void Parser::parse_into(MathArray & array, unsigned flags, MathTextCodes code)
 } // anonymous namespace
 
 
-
-MathArray mathed_parse_cell(string const & str)
+void mathed_parse_cell(MathArray & ar, string const & str)
 {
 	istringstream is(str.c_str());
-	Parser parser(is);
-	MathArray ar;
-	parser.parse_into(ar, 0);
-	return ar;
+	mathed_parse_cell(ar, is);
+}
+
+
+void mathed_parse_cell(MathArray & ar, istream & is)
+{
+	Parser(is).parse_into(ar, 0);
 }
 
 

src/mathed/math_parser.h

@@ -52,6 +52,8 @@ enum MathTokenEnum
 	///
 	LM_TK_ROOT,
 	///
+	LM_TK_LEFTEQN,
+	///
 	LM_TK_BEGIN,
 	///
 	LM_TK_END,
@@ -143,4 +145,7 @@ string mathed_parse_macro(string const &);
 string mathed_parse_macro(std::istream &);
 string mathed_parse_macro(LyXLex &);
 
+void mathed_parse_cell(MathArray & ar, string const & str);
+void mathed_parse_cell(MathArray & ar, std::istream & is);
+
 #endif