First shot at "auto correction" feature in mathed

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@4195 a592a061-630c-0410-9148-cb99ea01b6c8

lib/ChangeLog

@@ -1,3 +1,8 @@
+
+2002-05-23  André Pönitz <poenitz@gmx.net>
+
+	* lib/autocorrect: new file
+
 2002-05-03  Claus Hindsgaul  <claus_h@image.dk>
 
 	* examples/da_splash.lyx: revised

lib/autocorrect

@@ -0,0 +1,352 @@
+
+#
+# Idea of "autocorrection" and parts of this file are shamelessly stolen
+# from TeXMacs (they give vdhoeven@texmacs.org as contact)
+#
+# We do it a bit differently and allow corrections only to combine a symbol
+# and a char to a new symbol.
+# 
+#
+                  
+|                 ,    \lfloor
+\lfloor           *    |,
+|                 '    \lceil
+\lceil            *    |'
+,                 |    \rfloor
+\rfloor           *    ,|
+'                 |    \rceil
+\rceil            *    '|
+\llbracket        *    [[*
+\rrbracket        *    ]]*
+                  
+\cap              *    \sqcap
+\cup              *    \sqcup
+\vee              *    \curlyvee
+\curlyvee         *    \curlyveeuparrow
+\curlyveeuparrow  *    \curlyveedownarrow
+                  
+<                 /    \nless
+>                 /    \ngtr
+<                 =    \leqslant
+>                 =    \geqslant
+\leqslant         /    \nleqslant
+\geqslant         /    \ngeqslant
+\leqslant         *    \leq
+\geslant          *    \geq
+\leq              /    \nleq
+\geq              /    \ngeq
+<                 <    \ll
+\ll               <    \lll
+>                 >    \gg
+\gg               >    \ggg
+\ll               =    \lleq
+\lll              =    \llleq
+\gg               =    \ggeq
+\ggg              =    \gggeq
+\ll               /    \nll
+\lll              /    \nlll
+\gg               /    \ngg
+\ggg              /    \nggg
+\lleq             /    \nlleq
+\llleq            /    \nllleq
+\ggeq             /    \nggeq
+\gggeq            /    \ngggeq
+<                 .    \lessdot
+.                 >    \gtrdot
+\leqslant         .    \lesseqdot
+\gtrdot           =    \gtreqdot
+                  
+<                 *    \prec
+>                 *    \succ
+\prec             /    \nprec
+\succ             /    \nsucc
+\prec             =    \preccurlyeq
+\succ             =    \succcurlyeq
+\preccurlyeq      /    \npreccurlyeq
+\succcurlyeq      /    \nsucccurlyeq
+\preccurlyeq      *    \preceq
+\succcurlyeq      *    \succeq
+\preceq           /    \npreceq
+\succeq           /    \nsucceq
+\npreceq          *    \precneqq
+\nsucceq          *    \succneqq
+\ll               *    \precprec
+\precprec         *    \precprecprec
+\gg               *    \succsucc
+\succsucc         *    \succsuccsucc
+\precprec         =    \precpreceq
+\lll              *    \precprecprec
+\precprecprec     =    \precprecpreceq
+\succsucc         =    \succsucceq
+\ggg              =    \succsuccsucc
+\succsuccsucc     =    \succsuccsucceq
+\precprec         /    \nprecprec
+\precprecprec     /    \nprecprecprec
+\succsucc         /    \nsuccsucc
+\succsuccsucc     /    \nsuccsuccsucc
+\precpreceq       /    \nprecpreceq
+\precprecpreceq   /    \nprecprecpreceq
+\succsucceq       /    \nsuccsucceq
+\succsuccsucceq   /    \nsuccsuccsucceq
+
+\prec             .    \precdot
+\succ             .    \dotsucc
+\precdot          .    \preceqdot
+\dotsucc          .    \dotsucceq
+\precprec         *    \llangle
+\succsucc         *    \rrangle
+
+<                 >    \lessgtr
+>                 <    \gtrless
+<                 ~    \lesssim
+\lesssim          ~    \lessapprox
+\prec             ~    \precsim
+\precsim          ~    \precapprox
+>                 ~    \gtrsim
+\gtrsim           ~    \gtrapprox
+\succ             ~    \gtrsim
+\gtrsim           ~    \gtrapprox
+\leq              *    \leqq
+\geq              *    \geqq
+\leq              >    \lesseqgtr
+\geq              <    \gtrqless
+
+-                 >    \rightarrow
+<                 -    \leftarrow
+\leftarrow        >    \leftrightarrow
+\rightarrow       -    \longrightarrow
+\leftarrow        -    \longleftarrow
+\longleftarrow    >    \longleftrightarrow
+=                 >    \Rightarrow
+
+
+@                 *    \circ
+\circ             /    \varnothing
+\circ             +    \oplus
+\circ             -    \ominus
+@                 x    \otimes
+\circ             :    \oover
+\circ             .    \odot
+@                 R    \circledR
+@                 S    \circledS
+\varnothing       *    \oslash
+@                 \    \obslash
+@                 @    \infty
+\circ             <    \olessthan
+\circ             >    \ogreaterthan
+\circ             &    \owedge
+\circ             |    \obar
+\obar             *    \ovee
+\circ             v    \ovee
+\circ             @    \infty
+@@                *    \varocircle
+-@                @    \infty
+\circ             *    \box
+\box              +    \boxplus
+\box              -    \boxminus
+\box              x    \boxtimes
+\box              .    \boxdot
+\box              /    \boxslash
+\box              \    \boxbslash
+\box              @    \boxcircle
+\boxcircle        *    \boxbox
+\box              |    \boxbar
+\box              *    \bullet
+\bullet           *    \blacksquare
+                  
+=                 *    \asymp
+\asymp            *    \equiv
+\equiv            *    \asympasymp
+\asympasymp       *    \simsim
+~                 *    \sim
+\sim              ~    \approx
+\approx           -    \approxeq
+\sim              -    \simeq
+\sim              =    \cong
+=                 /    \neq
+\asymp            /    \nasymp
+\equiv            /    \nequiv
+\asympasymp       /    \nasympasymp
+\simsim           /    \nsimsim
+\sim              /    \nsim
+\approx           /    \napprox
+\simeq            /    \nsimeq
+\cong             /    \ncong
+                  
+#|   \|           
+|                 *    \shortmid
+\shortmid         *    \varshortmid
+|                 |    \||
+\||               |    \interleave
+\||               *    \shortparallel
+|                 -    \vdash
+\vdash            -    \longvdash
+\||               -    \Vdash
+\Vdash            -    \longVdash
+\interleave       -    \Vvdash
+\Vvdash           -    \longVvdash
+-                 |    \dashv
+
+<                 |    \vartriangleleft
+\vartriangleleft  *    \blacktriangleleft
+\vartriangleleft  /    \ntriangleleft
+\vartriangleleft  =    \trianglelefteqslant
+\trianglelefteqslant / \ntrianglelefteqslant
+\trianglelefteqslant * \trianglelefteq
+\trianglelefteq   /    \ntriangleqleft
+|                 >    \vartriangleright
+\vartriangleright *    \blacktriangleright
+\vartriangleright /    \ntriangleright
+\vartriangleright =    \trianglerighteq
+\trianglerighteq  /    \ntriangleqright
+\trianglerighteq  *    \trianglerighteqslant
+\trianglerighteqslant  /    \ntrianglerighteqslant
+
+-                 *    \um
++                 -    \pm
+\pm               *    \upm
+-                 +    \mp
+\mp               *    \ump
+@                 =    \circeq
+=                 @    \eqcirc
+-                 @    \multimap
+.                 =    \doteq
+.                 .    \ldots
+\ldots            *    \cdots
+\cdots            *    \hdots
+\hdots            *    \vdots
+\ddots            *    \ddots
+\udots            *    \udots
+:                 =    \assign
++                 =    \plusassign
+-                 =    \minusassign
+/                 *    \div
+*                 *    \ast
+\ast              *    \times
+\times            *    \cdot
+                       
+<                 *    \subset
+\subset           *    \in
+\                 /    \nsubset
+\in               *    \sqsubset 
+\subset           =    \subseteq
+\subseteq         /    \nsubseteq
+\subseteq         *    \subseteqq
+\sqsubset         *    \langle
+\langle           *    \leftslice
+\leftslice        *    \subset
+                  
+\subseteq         /    \nsubseteq
+\subseteqq        /    \nsubseteqq
+\nsubseteqq       *    \subsetneq
+\subsetneq        *    \varsubsetneq
+\varsubsetneq     *    \subsetneqq
+\subsetneqq       *    \varsubsetneqq
+\subset           +    \subsetplus
+\subsetplus       =    \subsetpluseq
+\subseteq         +    \subsetpluseq
+\in               /    \nin
+>                 *    \supset
+\supset           /    \nsupset
+\supset           =    \supseteq
+\supseteq         /    \nsupseteq
+\supseteq         *    \supseteqq
+\supseteq         /    \nsupseteq
+                  
+                  
+\supseteqq        /    \nsupseteqq
+\supseteq         /    \supsetneq
+\supset           +    \supsetplus
+\supsetplus       =    \supsetpluseq
+\supseteq         +    \supsetpluseq
+\supset           *    \ni
+\ni               /    \nni
+
+#
+# The following is available in TeXMacs, but not (yet) in LyX
+#
+
+#--|    \longdashv
+#|           =    \vDash
+#\vDash      =    \longvDash
+#||=    \VDash
+#||==    \longVDash
+#|           /    \nmid
+#||/    \nparallel
+#|*/    \nshortmid
+#||*/    \nshortparallel
+#|-/    \nvdash
+#||-/    \nVdash
+#-|/    \ndashv
+#-||/    \ndashV
+#|=/    \nvDash
+#||=/    \nVDash
+#=|/    \nDashv
+#=||/    \nDashV
+#
+#<=**>    \lesseqqgtr
+#>=**<    \gtreqqless
+#<>/   \nlessgtr
+#></   \ngtrless
+#<~/   \nlesssim
+#<~/*    \lnsim
+#<~~/    \nlessapprox
+#<~~/*    \lnapprox
+#<*~/    \nprecsim
+#<*~/*    \precnsim
+#<*~~/    \nprecapprox
+#<*~~/*    \precnapprox
+#>~/   \ngtrsim
+#>~/*    \gnsim
+#>~~/    \ngtrapprox
+#>~~/*    \gnapprox
+#>*~/   \nsuccsim
+#>*~/*    \succnsim
+#>*~~/    \nsuccapprox
+#>*~~/*    \succnapprox
+#<=**/    \nleqq
+#>=**/    \ngeqq
+#<=*>/    \nlesseqgtr
+#>=*</    \ngtreqless
+#<=**>/    \nlesseqqgtr
+#>=**</    \ngtreqqless
+#<=*/*    \lneq
+#<=**/*    \lneqq
+#<=**/**    \lvertneqq
+#>=*/*    \gneq
+#>=**/*    \gneqq
+#>=**/**    \gvertneqq
+#[[                *    \llbracket
+#]]                *    \rrbracket
+#EE                a    \amalg
+#EE                d    \partial
+#EE                p    \wp
+#EE                n    \cap
+#EE                u    \cup
+#EE                w    \wedge
+#\wedge            *    \curlywedge
+#\curlywedge       *    \curlywedgeuparrow
+#\curlywedgeuparrow   * \curlywedgedownarrow
+#\curlywedgedownarrow * \wedges
+#EE                v    \vee
+#EE                x    \times
+
+# <***/    \nsqsubset
+# <***=    \sqsubseteq
+# <***=/    \nsqsubseteq
+# >*=/**    \varsupsetneq
+# >*=*/*    \supsetneqq
+# >*=*/**    \varsupsetneqq
+# >***    \sqsupset
+# >***/    \nsqsupset
+# >***=    \sqsupseteq
+# >***=/    \nsqsupseteq
+
+# >****    \rangle
+# \rangle  *     \rightslice
+
+# EE                l    \bigl
+# EE                m    \bigm
+# EE                r    \bigr
+# EE                @    \bigop
+# EE                L    \int

src/mathed/ChangeLog

@@ -1,3 +1,11 @@
+
+2002-05-23  André Pönitz <poenitz@gmx.net>
+
+	* math_autocorrect.[Ch]: new "auto correction" feature
+	* math_cursor.[Ch]: subsequent changes
+	* math_parser.C: somewhat better error reporting
+
+
 2002-05-23  John Levon  <moz@compsoc.man.ac.uk>
 
 	* formula.C:

src/mathed/Makefile.am

@@ -19,6 +19,8 @@ libmathed_la_SOURCES = \
 	math_arrayinset.h \
 	math_atom.C \
 	math_atom.h \
+	math_autocorrect.C \
+	math_autocorrect.h \
 	math_biginset.C \
 	math_biginset.h \
 	math_binominset.C \

src/mathed/math_autocorrect.C

@@ -0,0 +1,168 @@
+#include <config.h>
+
+#include "LString.h"
+#include "Lsstream.h"
+#include "debug.h"
+#include "support/filetools.h" //  LibFileSearch
+#include "math_data.h"
+#include "math_inset.h"
+#include "math_parser.h"
+
+#include <iostream>
+#include <fstream>
+
+using std::ifstream;
+using std::istream;
+using std::ostream;
+using std::endl;
+
+
+namespace {
+
+class Correction {
+public:
+	///
+	Correction() {}
+	///
+	bool correct(MathAtom & at, char c) const;
+	///
+	bool read(istream & is);
+	///
+	void write(ostream & os) const;
+private:
+	///	
+	MathAtom from1_;
+	///	
+	char from2_;
+	///	
+	MathAtom to_;
+};
+
+
+bool Correction::read(istream & is)
+{
+	string s1, s2, s3;
+	is >> s1 >> s2 >> s3;
+	if (!is)
+		return false;
+	MathArray ar1, ar3;
+	mathed_parse_cell(ar1, s1);
+	mathed_parse_cell(ar3, s3);
+	if (ar1.size() != 1  ||  s2.size() != 1  ||  ar3.size() !=1)
+		return false;
+	from1_ = ar1.front();
+	from2_ = s2[0];
+	to_    = ar3.front();
+	return true;
+}
+
+
+void Correction::write(ostream & os) const
+{
+	os << "from: '" << from1_ << "' and '" << from2_
+	   << "' to '" << to_ << "'" << endl;
+}
+
+
+bool Correction::correct(MathAtom & at, char c) const
+{
+	//lyxerr[Debug::MATHED]
+	//	<< "trying to correct ar: " << at << " from: '" << from1_ << "'" << endl;
+	if (from2_ != c)
+		return false;
+	if (!at->match(from1_.nucleus()))
+		return false;
+	lyxerr[Debug::MATHED]
+		<< "match found! subst in " << at
+		<< " from: '" << from1_ << "' to '" << to_ << "'" << endl;
+	at = to_;
+	return true;
+}
+
+
+istream & operator>>(istream & is, Correction & corr)
+{
+	corr.read(is);
+	return is;
+}
+
+
+ostream & operator<<(ostream & os, Correction & corr)
+{
+	corr.write(os);
+	return os;
+}
+
+
+
+
+class Corrections {
+public:
+	///	
+	typedef vector<Correction>::const_iterator const_iterator;
+	///	
+	Corrections() {}
+	///	
+	void insert(const Correction & corr) { data_.push_back(corr); }
+	///
+	bool correct(MathAtom & at, char c) const;
+private:
+	///	
+	vector<Correction> data_;	
+};
+
+
+bool Corrections::correct(MathAtom & at, char c) const
+{
+	for (const_iterator it = data_.begin(); it != data_.end(); ++it)
+		if (it->correct(at, c))
+			return true;
+	return false;
+}
+
+
+Corrections theCorrections;
+
+void initAutoCorrect()
+{
+	lyxerr[Debug::MATHED] << "reading autocorrect file" << endl;
+	string const file = LibFileSearch(string(), "autocorrect");
+	if (file.empty()) {
+		lyxerr << "Could not find autocorrect file" << endl;
+		return;
+	}
+
+	string line;
+	ifstream is(file.c_str());
+	while (getline(is, line)) {
+		if (line.size() == 0 || line[0] == '#') {
+			//lyxerr[Debug::MATHED] << "ignoring line '" << line << "'" << endl;
+			continue;
+		}
+		istringstream il(line);
+		//lyxerr[Debug::MATHED] << "line '" << line << "'" << endl;
+		Correction corr;
+		if (corr.read(il)) {
+			//lyxerr[Debug::MATHED] << "parsed: '" << corr << "'" << endl;
+			theCorrections.insert(corr);
+		}
+	}
+
+	lyxerr[Debug::MATHED] << "done reading autocorrections." << endl;
+}
+
+
+} // namespace anon
+
+
+bool math_autocorrect(MathAtom & at, char c)
+{
+	static bool initialized = false;
+
+	if (!initialized) {
+		initAutoCorrect();
+		initialized = true;
+	}
+
+	return theCorrections.correct(at, c);
+}

src/mathed/math_autocorrect.h

@@ -0,0 +1,9 @@
+#ifndef MATHAUTOCORRECT_H
+#define MATHAUTOCORRECT_H
+
+class MathAtom;
+
+// make "corrections" according to file lib/autocorrect
+bool math_autocorrect(MathAtom & at, char c);
+
+#endif

src/mathed/math_cursor.C

@@ -29,6 +29,7 @@
 #include "frontends/Painter.h"
 #include "math_cursor.h"
 #include "formulabase.h"
+#include "math_autocorrect.h"
 #include "math_arrayinset.h"
 #include "math_braceinset.h"
 #include "math_boxinset.h"
@@ -182,7 +183,8 @@ Selection theSelection;
 
 
 MathCursor::MathCursor(InsetFormulaBase * formula, bool left)
-	: formula_(formula), lastcode_(LM_TC_MIN), selection_(false)
+	:	formula_(formula), lastcode_(LM_TC_MIN), 
+		autocorrect_(false), selection_(false)
 {
 	left ? first() : last();
 }
@@ -299,6 +301,7 @@ bool MathCursor::posRight()
 bool MathCursor::left(bool sel)
 {
 	dump("Left 1");
+	autocorrect_ = false;
 	if (inMacroMode()) {
 		macroModeClose();
 		lastcode_ = LM_TC_MIN;
@@ -319,6 +322,7 @@ bool MathCursor::left(bool sel)
 bool MathCursor::right(bool sel)
 {
 	dump("Right 1");
+	autocorrect_ = false;
 	if (inMacroMode()) {
 		macroModeClose();
 		lastcode_ = LM_TC_MIN;
@@ -386,6 +390,7 @@ void MathCursor::setPos(int x, int y)
 void MathCursor::home(bool sel)
 {
 	dump("home 1");
+	autocorrect_ = false;
 	selHandle(sel);
 	macroModeClose();
 	lastcode_ = LM_TC_MIN;
@@ -398,6 +403,7 @@ void MathCursor::home(bool sel)
 void MathCursor::end(bool sel)
 {
 	dump("end 1");
+	autocorrect_ = false;
 	selHandle(sel);
 	macroModeClose();
 	lastcode_ = LM_TC_MIN;
@@ -498,6 +504,7 @@ void MathCursor::paste(MathArray const & ar)
 
 void MathCursor::backspace()
 {
+	autocorrect_ = false;
 	if (pos() == 0) {
 		pullArg(false);
 		return;
@@ -523,6 +530,7 @@ void MathCursor::backspace()
 
 void MathCursor::erase()
 {
+	autocorrect_ = false;
 	if (inMacroMode())
 		return;
 
@@ -556,6 +564,7 @@ void MathCursor::erase()
 
 void MathCursor::delLine()
 {
+	autocorrect_ = false;
 	macroModeClose();
 
 	if (selection_) {
@@ -586,6 +595,7 @@ bool MathCursor::up(bool sel)
 	if (goUpDown(true))
 		return true;
 	Cursor_ = save;
+	autocorrect_ = false;
 	return selection_;
 }
 
@@ -599,6 +609,7 @@ bool MathCursor::down(bool sel)
 	if (goUpDown(false))
 		return true;
 	Cursor_ = save;
+	autocorrect_ = false;
 	return selection_;
 }
 
@@ -1490,6 +1501,12 @@ bool MathCursor::interpret(char c)
 		return true;
 	}
 
+	// leave autocorrect mode if necessary
+	if (autocorrect_ && c == ' ') {
+		autocorrect_ = false;
+		return true;
+	}
+
 	// just clear selection on pressing the space par
 	if (selection_ && c == ' ') {
 		selClear();
@@ -1563,9 +1580,14 @@ bool MathCursor::interpret(char c)
 		return true;
 	}
 
+	// try auto-correction
+	if (autocorrect_ && hasPrevAtom() && math_autocorrect(prevAtom(), c))
+		return true;
+
 	// no special circumstances, so insert the character without any fuss
 	insert(c, lastcode_ == LM_TC_MIN ? MathCharInset::nativeCode(c) : lastcode_);
 	lastcode_ = LM_TC_MIN;
+	autocorrect_ = true;  
 	return true;
 }
 

src/mathed/math_cursor.h

@@ -287,7 +287,8 @@ private:
 	InsetFormulaBase * formula_;
 	/// text code of last char entered
 	MathTextCodes lastcode_;
-	// Selection stuff
+	/// do we allow autocorrection
+	bool autocorrect_;
 	/// do we currently select
 	bool selection_;
 };

src/mathed/math_inset.C

@@ -38,6 +38,16 @@ int MathInset::height() const
 }
 
 
+ostream & operator<<(ostream & os, MathAtom const & at)
+{
+	if (at.nucleus())
+		os << *(at.nucleus());
+	else
+		os << "(nil)";
+	return os;
+}
+
+
 ostream & operator<<(ostream & os, MathInset const & inset)
 {
 	WriteStream wi(os, false, false);
@@ -45,7 +55,6 @@ ostream & operator<<(ostream & os, MathInset const & inset)
 	return os;
 }
 
-
 MathInset::size_type MathInset::nargs() const
 {
 	return 0;

src/mathed/math_inset.h

@@ -255,5 +255,6 @@ public:
 };
 
 std::ostream & operator<<(std::ostream &, MathInset const &);
+std::ostream & operator<<(std::ostream &, MathAtom const &);
 
 #endif

src/mathed/math_parser.C

@@ -420,8 +420,10 @@ bool Parser::good() const
 
 char Parser::getChar()
 {
-	if (!good())
+	if (!good()) {
 		lyxerr << "The input stream is not well..." << endl;
+		dump();
+	}
 	return tokens_[pos_++].character();
 }
 
@@ -486,7 +488,7 @@ void Parser::tokenize(string const & buffer)
 
 	char c;
 	while (is.get(c)) {
-		//lyxerr << "reading c: " << c << "\n";
+		lyxerr << "reading c: " << c << "\n";
 
 		switch (catcode(c)) {
 			case catNewline: {
@@ -1030,8 +1032,8 @@ void Parser::parse_into1(MathArray & array, unsigned flags, MathTextCodes code)
 		else if (t.cat() == catEnd) {
 			if (flags & FLAG_BRACE_LAST)
 				return;
-			dump();
 			lyxerr << "found '}' unexpectedly, array: '" << array << "'\n";
+			dump();
 			//lyxerr << "found '}' unexpectedly\n";
 			//lyx::Assert(0);
 			//add(array, '}', LM_TC_TEX);
@@ -1039,6 +1041,7 @@ void Parser::parse_into1(MathArray & array, unsigned flags, MathTextCodes code)
 
 		else if (t.cat() == catAlign) {
 			lyxerr << "found tab unexpectedly, array: '" << array << "'\n";
+			dump();
 			//lyxerr << "found tab unexpectedly\n";
 			add(array, '&', LM_TC_TEX);
 		}