X-Git-Url: https://git.lyx.org/gitweb/?a=blobdiff_plain;f=src%2Fmathed%2Fmath_extern.C;h=8f26fd7c5e5e3d66da7cd2fe0b33cdf398dcfb9f;hb=cd03e2b7db8379a91f3d31eac2c5bc25b159c541;hp=4846bf146fb9e12b295135be2e18169bb5b28f0d;hpb=c80a4abde986318a05931e034f3e666cd3b33659;p=lyx.git diff --git a/src/mathed/math_extern.C b/src/mathed/math_extern.C index 4846bf146f..8f26fd7c5e 100644 --- a/src/mathed/math_extern.C +++ b/src/mathed/math_extern.C @@ -1,39 +1,91 @@ +/** + * \file math_extern.C + * This file is part of LyX, the document processor. + * Licence details can be found in the file COPYING. + * + * \author André Pönitz + * + * Full author contact details are available in file CREDITS. + */ // This file contains most of the magic that extracts "context // information" from the unstructered layout-oriented stuff in an // MathArray. -#include +#include +#include "math_extern.h" +#include "math_arrayinset.h" #include "math_charinset.h" #include "math_deliminset.h" +#include "math_data.h" #include "math_diffinset.h" #include "math_exfuncinset.h" #include "math_exintinset.h" -#include "math_funcinset.h" #include "math_fracinset.h" +#include "math_liminset.h" #include "math_matrixinset.h" #include "math_mathmlstream.h" +#include "math_numberinset.h" #include "math_scriptinset.h" #include "math_stringinset.h" #include "math_symbolinset.h" +#include "math_parser.h" +#include "support/std_sstream.h" #include "debug.h" +#include "support/filetools.h" +#include "support/lstrings.h" + +#include + +using lyx::support::cmd_ret; +using lyx::support::getVectorFromString; +using lyx::support::LibFileSearch; +using lyx::support::RunCommand; +using lyx::support::subst; + +using std::endl; +using std::find_if; +using std::istringstream; +using std::ostream; +using std::ostringstream; -std::ostream & operator<<(std::ostream & os, MathArray const & ar) + +ostream & operator<<(ostream & os, MathArray const & ar) { - NormalStream ns(os); + NormalStream ns(os); ns << ar; return os; } // define a function for tests -typedef bool TestItemFunc(MathInset *); +typedef bool TestItemFunc(MathAtom const &); // define a function for replacing subexpressions -typedef MathInset * ReplaceArgumentFunc(const MathArray & ar); +typedef MathAtom ReplaceArgumentFunc(const MathArray & ar); + + + +// try to extract a super/subscript +// modify iterator position to point behind the thing +bool extractScript(MathArray & ar, + MathArray::iterator & pos, MathArray::iterator last) +{ + // nothing to get here + if (pos == last) + return false; + // is this a scriptinset? + if (!(*pos)->asScriptInset()) + return false; + + // it is a scriptinset, use it. + ar.push_back(*pos); + ++pos; + return true; +} // try to extract an "argument" to some function. @@ -61,13 +113,9 @@ MathArray::iterator extractArgument(MathArray & ar, // if the next item is a subscript, it most certainly belongs to the // thing we have - if ((*pos)->asScriptInset()) { - ar.push_back(*pos); - // go ahead if possible - ++pos; - if (pos == last) - return pos; - } + extractScript(ar, pos, last); + if (pos == last) + return pos; // but it might be more than that. // FIXME: not implemented @@ -82,93 +130,91 @@ MathArray::iterator extractArgument(MathArray & ar, } -MathScriptInset const * asScript(MathArray::const_iterator it) -{ - if (it->nucleus()->asScriptInset()) - return 0; - ++it; - if (!it->nucleus()) - return 0; - return it->nucleus()->asScriptInset(); -} - - - // returns sequence of char with same code starting at it up to end // it might be less, though... -string charSequence(MathArray::const_iterator it, MathArray::const_iterator end) +string charSequence + (MathArray::const_iterator it, MathArray::const_iterator end) { string s; - MathCharInset const * p = it->nucleus()->asCharInset(); - if (p) { - for (MathTextCodes c = p->code(); it != end; ++it) { - p = it->nucleus()->asCharInset(); - if (!p || p->code() != c) - break; - s += p->getChar(); - } - } + for (; it != end && (*it)->asCharInset(); ++it) + s += (*it)->getChar(); return s; } -void extractStrings(MathArray & dat) +void extractStrings(MathArray & ar) { - //lyxerr << "\nStrings from: " << ar << "\n"; - MathArray ar; - MathArray::const_iterator it = dat.begin(); - while (it != dat.end()) { - if (it->nucleus() && it->nucleus()->asCharInset()) { - string s = charSequence(it, dat.end()); - MathTextCodes c = it->nucleus()->asCharInset()->code(); - ar.push_back(MathAtom(new MathStringInset(s, c))); - it += s.size(); - } else { - ar.push_back(*it); - ++it; - } + //lyxerr << "\nStrings from: " << ar << endl; + for (MathArray::size_type i = 0; i < ar.size(); ++i) { + if (!ar[i]->asCharInset()) + continue; + string s = charSequence(ar.begin() + i, ar.end()); + ar[i] = MathAtom(new MathStringInset(s)); + ar.erase(i + 1, i + s.size()); } - ar.swap(dat); - //lyxerr << "\nStrings to: " << ar << "\n"; -} - - -MathInset * singleItem(MathArray & ar) -{ - return ar.size() == 1 ? ar.begin()->nucleus() : 0; + //lyxerr << "\nStrings to: " << ar << endl; } void extractMatrices(MathArray & ar) { - lyxerr << "\nMatrices from: " << ar << "\n"; - for (MathArray::iterator it = ar.begin(); it != ar.end(); ++it) { - MathDelimInset * del = (*it)->asDelimInset(); - if (!del) + //lyxerr << "\nMatrices from: " << ar << endl; + // first pass for explicitly delimited stuff + for (MathArray::size_type i = 0; i < ar.size(); ++i) { + if (!ar[i]->asDelimInset()) continue; - MathInset * arr = singleItem(del->cell(0)); - if (!arr || !arr->asArrayInset()) + MathArray const & arr = ar[i]->asDelimInset()->cell(0); + if (arr.size() != 1) continue; - *it = MathAtom(new MathMatrixInset(*(arr->asArrayInset()))); + if (!arr.front()->asGridInset()) + continue; + ar[i] = MathAtom(new MathMatrixInset(*(arr.front()->asGridInset()))); } - lyxerr << "\nMatrices to: " << ar << "\n"; + + // second pass for AMS "pmatrix" etc + for (MathArray::size_type i = 0; i < ar.size(); ++i) + if (ar[i]->asAMSArrayInset()) + ar[i] = MathAtom(new MathMatrixInset(*(ar[i]->asGridInset()))); + //lyxerr << "\nMatrices to: " << ar << endl; } // convert this inset somehow to a string -string extractString(MathInset * p) +bool extractString(MathAtom const & at, string & str) +{ + if (at->getChar()) { + str = string(1, at->getChar()); + return true; + } + if (at->asStringInset()) { + str = at->asStringInset()->str(); + return true; + } + return false; +} + + +// convert this inset somehow to a number +bool extractNumber(MathArray const & ar, int & i) { - if (p && p->getChar()) - return string(1, p->getChar()); - if (p && p->asStringInset()) - return p->asStringInset()->str(); - return string(); + istringstream is(charSequence(ar.begin(), ar.end()).c_str()); + is >> i; + return is; } -bool stringTest(MathInset * p, const string & str) +bool extractNumber(MathArray const & ar, double & d) { - return extractString(p) == str; + istringstream is(charSequence(ar.begin(), ar.end()).c_str()); + is >> d; + return is; +} + + +bool testString(MathAtom const & at, string const & str) +{ + string s; + return extractString(at, s) && str == s; } @@ -181,9 +227,9 @@ MathArray::iterator endNestSearch( ) { for (int level = 0; it != last; ++it) { - if (testOpen(it->nucleus())) + if (testOpen(*it)) ++level; - if (testClose(it->nucleus())) + if (testClose(*it)) --level; if (level == 0) break; @@ -204,55 +250,170 @@ void replaceNested( // to modify the array. for (MathArray::size_type i = 0; i < ar.size(); ++i) { // check whether this is the begin of the sequence - MathArray::iterator it = ar.begin() + i; - if (!testOpen(it->nucleus())) + if (!testOpen(ar[i])) continue; // search end of sequence + MathArray::iterator it = ar.begin() + i; MathArray::iterator jt = endNestSearch(it, ar.end(), testOpen, testClose); if (jt == ar.end()) continue; - // create a proper inset as replacement - MathInset * p = replaceArg(MathArray(it + 1, jt)); - // replace the original stuff by the new inset + ar[i] = replaceArg(MathArray(it + 1, jt)); ar.erase(it + 1, jt + 1); - (*it).reset(p); } -} +} + + + +// +// split scripts into seperate super- and subscript insets. sub goes in +// front of super... +// + +void splitScripts(MathArray & ar) +{ + //lyxerr << "\nScripts from: " << ar << endl; + for (MathArray::size_type i = 0; i < ar.size(); ++i) { + // is this script inset? + if (!ar[i]->asScriptInset()) + continue; + + // no problem if we don't have both... + if (!ar[i]->asScriptInset()->hasUp()) + continue; + if (!ar[i]->asScriptInset()->hasDown()) + continue; + + // create extra script inset and move superscript over + MathScriptInset * p = ar[i].nucleus()->asScriptInset(); + MathScriptInset * q = new MathScriptInset(true); + std::swap(q->up(), p->up()); + p->removeScript(true); + + // insert new inset behind + ++i; + ar.insert(i, MathAtom(q)); + } + //lyxerr << "\nScripts to: " << ar << endl; +} + + +// +// extract exp(...) +// + +void extractExps(MathArray & ar) +{ + //lyxerr << "\nExps from: " << ar << endl; + for (MathArray::size_type i = 0; i + 1 < ar.size(); ++i) { + // is this 'e'? + if (ar[i]->getChar() != 'e') + continue; + + // we need an exponent but no subscript + MathScriptInset const * sup = ar[i + 1]->asScriptInset(); + if (!sup || sup->hasDown()) + continue; + + // create a proper exp-inset as replacement + ar[i] = MathAtom(new MathExFuncInset("exp", sup->cell(1))); + ar.erase(i + 1); + } + //lyxerr << "\nExps to: " << ar << endl; +} + + +// +// extract det(...) from |matrix| +// +void extractDets(MathArray & ar) +{ + //lyxerr << "\ndet from: " << ar << endl; + for (MathArray::iterator it = ar.begin(); it != ar.end(); ++it) { + MathDelimInset const * del = (*it)->asDelimInset(); + if (!del) + continue; + if (!del->isAbs()) + continue; + *it = MathAtom(new MathExFuncInset("det", del->cell(0))); + } + //lyxerr << "\ndet to: " << ar << endl; +} + + +// +// search numbers +// + +bool isDigitOrSimilar(char c) +{ + return ('0' <= c && c <= '9') || c == '.'; +} + + +// returns sequence of digits +string digitSequence + (MathArray::const_iterator it, MathArray::const_iterator end) +{ + string s; + for (; it != end && (*it)->asCharInset(); ++it) { + if (!isDigitOrSimilar((*it)->getChar())) + break; + s += (*it)->getChar(); + } + return s; +} + + +void extractNumbers(MathArray & ar) +{ + //lyxerr << "\nNumbers from: " << ar << endl; + for (MathArray::size_type i = 0; i < ar.size(); ++i) { + if (!ar[i]->asCharInset()) + continue; + if (!isDigitOrSimilar(ar[i]->asCharInset()->getChar())) + continue; + + string s = digitSequence(ar.begin() + i, ar.end()); + + ar[i] = MathAtom(new MathNumberInset(s)); + ar.erase(i + 1, i + s.size()); + } + //lyxerr << "\nNumbers to: " << ar << endl; +} + // // search deliminiters // -bool openParanTest(MathInset * p) +bool testOpenParan(MathAtom const & at) { - return stringTest(p, "("); + return testString(at, "("); } -bool closeParanTest(MathInset * p) +bool testCloseParan(MathAtom const & at) { - return stringTest(p, ")"); + return testString(at, ")"); } -MathInset * delimReplacement(const MathArray & ar) +MathAtom replaceDelims(const MathArray & ar) { - MathDelimInset * del = new MathDelimInset("(", ")"); - del->cell(0) = ar; - return del; + return MathAtom(new MathDelimInset("(", ")", ar)); } // replace '('...')' sequences by a real MathDelimInset void extractDelims(MathArray & ar) { - lyxerr << "\nDelims from: " << ar << "\n"; - replaceNested(ar, openParanTest, closeParanTest, delimReplacement); - lyxerr << "\nDelims to: " << ar << "\n"; + //lyxerr << "\nDelims from: " << ar << endl; + replaceNested(ar, testOpenParan, testCloseParan, replaceDelims); + //lyxerr << "\nDelims to: " << ar << endl; } @@ -267,66 +428,89 @@ void extractDelims(MathArray & ar) void extractFunctions(MathArray & ar) { // we need at least two items... - if (ar.size() <= 1) + if (ar.size() < 2) return; - lyxerr << "\nFunctions from: " << ar << "\n"; - for (MathArray::size_type i = 0; i < ar.size() - 1; ++i) { + //lyxerr << "\nFunctions from: " << ar << endl; + for (MathArray::size_type i = 0; i + 1 < ar.size(); ++i) { MathArray::iterator it = ar.begin() + i; - - // is this a function name? - MathFuncInset * func = (*it)->asFuncInset(); - if (!func) - continue; - - // do we have an exponent? - // simply skippping the postion does the right thing: - // 'sin' '^2' 'x' -> 'sin(x)' '^2' MathArray::iterator jt = it + 1; - if (MathScriptInset * script = (*jt)->asScriptInset()) { - // allow superscripts only - if (script->hasDown()) + + string name; + // is it a function? + if ((*it)->asUnknownInset()) { + // it certainly is if it is well known... + name = (*it)->name(); + } else { + // is this a user defined function? + // it it probably not, if it doesn't have a name. + if (!extractString(*it, name)) continue; - ++jt; + // it is not if it has no argument if (jt == ar.end()) continue; + // guess so, if this is followed by + // a DelimInset with a single item in the cell + MathDelimInset const * del = (*jt)->asDelimInset(); + if (!del || del->cell(0).size() != 1) + continue; + // fall trough into main branch } - + + // do we have an exponent like in + // 'sin' '^2' 'x' -> 'sin(x)' '^2' + MathArray exp; + extractScript(exp, jt, ar.end()); + // create a proper inset as replacement - MathExFuncInset * p = new MathExFuncInset(func->name()); + MathExFuncInset * p = new MathExFuncInset(name); // jt points to the "argument". Get hold of this. MathArray::iterator st = extractArgument(p->cell(0), jt, ar.end()); // replace the function name by a real function inset - (*it).reset(p); - + *it = MathAtom(p); + // remove the source of the argument from the array - ar.erase(jt, st); - lyxerr << "\nFunctions to: " << ar << "\n"; + ar.erase(it + 1, st); + + // re-insert exponent + ar.insert(i + 1, exp); + //lyxerr << "\nFunctions to: " << ar << endl; } -} +} // // search integrals // -bool symbolTest(MathInset * p, string const & name) +bool testSymbol(MathAtom const & at, string const & name) { - return p->asSymbolInset() && p->asSymbolInset()->name() == name; + return at->asSymbolInset() && at->asSymbolInset()->name() == name; } -bool intSymbolTest(MathInset * p) +bool testIntSymbol(MathAtom const & at) { - return symbolTest(p, "int"); + return testSymbol(at, "int"); } -bool intDiffTest(MathInset * p) +bool testIntegral(MathAtom const & at) { - return stringTest(p, "d"); + return + testIntSymbol(at) || + ( at->asScriptInset() + && at->asScriptInset()->nuc().size() + && testIntSymbol(at->asScriptInset()->nuc().back()) ); +} + + + +bool testIntDiff(MathAtom const & at) +{ + return testString(at, "d"); } @@ -335,45 +519,43 @@ bool intDiffTest(MathInset * p) void extractIntegrals(MathArray & ar) { // we need at least three items... - if (ar.size() <= 2) + if (ar.size() < 3) return; - lyxerr << "\nIntegrals from: " << ar << "\n"; - for (MathArray::size_type i = 0; i < ar.size() - 1; ++i) { + //lyxerr << "\nIntegrals from: " << ar << endl; + for (MathArray::size_type i = 0; i + 1 < ar.size(); ++i) { MathArray::iterator it = ar.begin() + i; - // is this a integral name? - if (!intSymbolTest(it->nucleus())) - continue; - // search 'd' MathArray::iterator jt = - endNestSearch(it, ar.end(), intSymbolTest, intDiffTest); + endNestSearch(it, ar.end(), testIntegral, testIntDiff); // something sensible found? if (jt == ar.end()) continue; - // create a proper inset as replacement + // is this a integral name? + if (!testIntegral(*it)) + continue; + + // core ist part from behind the scripts to the 'd' MathExIntInset * p = new MathExIntInset("int"); - // collect scripts - MathArray::iterator st = it + 1; - if ((*st)->asScriptInset()) { - p->scripts(*st); - p->cell(0) = MathArray(st + 1, jt); - } else { - p->cell(0) = MathArray(st, jt); + // handle scripts if available + if (!testIntSymbol(*it)) { + p->cell(2) = (*it)->asScriptInset()->down(); + p->cell(3) = (*it)->asScriptInset()->up(); } + p->cell(0) = MathArray(it + 1, jt); - // use the atom behind the 'd' as differential + // use the "thing" behind the 'd' as differential MathArray::iterator tt = extractArgument(p->cell(1), jt + 1, ar.end()); - + // remove used parts ar.erase(it + 1, tt); - (*it).reset(p); + *it = MathAtom(p); } - lyxerr << "\nIntegrals to: " << ar << "\n"; + //lyxerr << "\nIntegrals to: " << ar << endl; } @@ -381,77 +563,78 @@ void extractIntegrals(MathArray & ar) // search sums // -bool sumSymbolTest(MathInset * p) + +bool testEqualSign(MathAtom const & at) { - return p->asSymbolInset() && p->asSymbolInset()->name() == "sum"; + return testString(at, "="); } -bool equalSign(MathInset * p) +bool testSumSymbol(MathAtom const & p) { - return stringTest(p, "="); + return testSymbol(p, "sum"); } -bool equalSign1(MathAtom const & at) +bool testSum(MathAtom const & at) { - return equalSign(at.nucleus()); + return + testSumSymbol(at) || + ( at->asScriptInset() + && at->asScriptInset()->nuc().size() + && testSumSymbol(at->asScriptInset()->nuc().back()) ); } - // replace '\sum' ['_^'] f(x) sequences by a real MathExIntInset // assume 'extractDelims' ran before void extractSums(MathArray & ar) { // we need at least two items... - if (ar.size() <= 1) + if (ar.size() < 2) return; - lyxerr << "\nSums from: " << ar << "\n"; - for (MathArray::size_type i = 0; i < ar.size() - 1; ++i) { + //lyxerr << "\nSums from: " << ar << endl; + for (MathArray::size_type i = 0; i + 1 < ar.size(); ++i) { MathArray::iterator it = ar.begin() + i; // is this a sum name? - if (!sumSymbolTest(it->nucleus())) + if (!testSum(ar[i])) continue; // create a proper inset as replacement MathExIntInset * p = new MathExIntInset("sum"); - // collect scripts - MathArray::iterator st = it + 1; - if (st != ar.end() && (*st)->asScriptInset()) { - p->scripts(*st); - ++st; - + // collect lower bound and summation index + MathScriptInset const * sub = ar[i]->asScriptInset(); + if (sub && sub->hasDown()) { // try to figure out the summation index from the subscript - MathScriptInset * script = p->scripts()->asScriptInset(); - if (script->hasDown()) { - MathArray & ar = script->down().data_; - MathArray::iterator it = - std::find_if(ar.begin(), ar.end(), &equalSign1); - if (it != ar.end()) { - // we found a '=', use everything in front of that as index, - // and everything behind as start value - p->cell(1) = MathArray(ar.begin(), it); - ar.erase(ar.begin(), it + 1); - } else { - // use everything as summation index, don't use scripts. - p->cell(1) = ar; - p->scripts().reset(0); - } + MathArray const & ar = sub->down(); + MathArray::const_iterator xt = + find_if(ar.begin(), ar.end(), &testEqualSign); + if (xt != ar.end()) { + // we found a '=', use everything in front of that as index, + // and everything behind as lower index + p->cell(1) = MathArray(ar.begin(), xt); + p->cell(2) = MathArray(xt + 1, ar.end()); + } else { + // use everything as summation index, don't use scripts. + p->cell(1) = ar; } } - // use some behind the script as core - MathArray::iterator tt = extractArgument(p->cell(0), st, ar.end()); + // collect upper bound + if (sub && sub->hasUp()) + p->cell(3) = sub->up(); + + // use something behind the script as core + MathArray::iterator tt = extractArgument(p->cell(0), it + 1, ar.end()); // cleanup ar.erase(it + 1, tt); - (*it).reset(p); + *it = MathAtom(p); } - lyxerr << "\nSums to: " << ar << "\n"; + //lyxerr << "\nSums to: " << ar << endl; } @@ -460,75 +643,176 @@ void extractSums(MathArray & ar) // // tests for 'd' or '\partial' -bool diffItemTest(MathInset * p) +bool testDiffItem(MathAtom const & at) { - return stringTest(p, "d"); + return testString(at, "d"); } -bool diffItemTest(MathArray const & ar) +bool testDiffArray(MathArray const & ar) { - return ar.size() && diffItemTest(ar.front().nucleus()); + return ar.size() && testDiffItem(ar.front()); } -bool diffFracTest(MathInset * p) +bool testDiffFrac(MathAtom const & at) { return - p->asFracInset() && - diffItemTest(p->asFracInset()->cell(0)) && - diffItemTest(p->asFracInset()->cell(1)); + at->asFracInset() + && testDiffArray(at->asFracInset()->cell(0)) + && testDiffArray(at->asFracInset()->cell(1)); } + void extractDiff(MathArray & ar) { - lyxerr << "\nDiffs from: " << ar << "\n"; - for (MathArray::size_type i = 0; i < ar.size() - 1; ++i) { + //lyxerr << "\nDiffs from: " << ar << endl; + for (MathArray::size_type i = 0; i < ar.size(); ++i) { MathArray::iterator it = ar.begin() + i; // is this a "differential fraction"? - if (!diffFracTest(it->nucleus())) + if (!testDiffFrac(*it)) continue; - - MathFracInset * f = (*it)->asFracInset(); + + MathFracInset const * f = (*it)->asFracInset(); if (!f) { - lyxerr << "should not happen\n"; + lyxerr << "should not happen" << endl; continue; } // create a proper diff inset - MathDiffInset * p = new MathDiffInset; - - // collect function - MathArray::iterator jt = it + 1; - if (f->cell(0).size() > 1) - p->cell(0) = MathArray(f->cell(0).begin() + 1, f->cell(0).end()); - else - jt = extractArgument(p->cell(0), jt, ar.end()); - - // collect denominator - + MathDiffInset * diff = new MathDiffInset; + + // collect function, let jt point behind last used item + MathArray::iterator jt = it + 1; + //int n = 1; + MathArray const & numer = f->cell(0); + if (numer.size() > 1 && numer[1]->asScriptInset()) { + // this is something like d^n f(x) / d... or d^n / d... + // FIXME + //n = 1; + if (numer.size() > 2) + diff->cell(0) = MathArray(numer.begin() + 2, numer.end()); + else + jt = extractArgument(diff->cell(0), jt, ar.end()); + } else { + // simply d f(x) / d... or d/d... + if (numer.size() > 1) + diff->cell(0) = MathArray(numer.begin() + 1, numer.end()); + else + jt = extractArgument(diff->cell(0), jt, ar.end()); + } + + // collect denominator parts + MathArray const & denom = f->cell(1); + for (MathArray::const_iterator dt = denom.begin(); dt != denom.end();) { + // find the next 'd' + MathArray::const_iterator et + = find_if(dt + 1, denom.end(), &testDiffItem); + + // point before this + MathArray::const_iterator st = et - 1; + MathScriptInset const * script = (*st)->asScriptInset(); + if (script && script->hasUp()) { + // things like d.../dx^n + int mult = 1; + if (extractNumber(script->up(), mult)) { + //lyxerr << "mult: " << mult << endl; + for (int i = 0; i < mult; ++i) + diff->addDer(MathArray(dt + 1, st)); + } + } else { + // just d.../dx + diff->addDer(MathArray(dt + 1, et)); + } + dt = et; + } // cleanup ar.erase(it + 1, jt); - (*it).reset(p); + *it = MathAtom(diff); } - lyxerr << "\nDiffs to: " << ar << "\n"; + //lyxerr << "\nDiffs to: " << ar << endl; } + +// +// search limits +// + + +bool testRightArrow(MathAtom const & at) +{ + return testSymbol(at, "to") || testSymbol(at, "rightarrow"); +} + + + +// replace '\lim_{x->x0} f(x)' sequences by a real MathLimInset +// assume 'extractDelims' ran before +void extractLims(MathArray & ar) +{ + // we need at least three items... + if (ar.size() < 3) + return; + + //lyxerr << "\nLimits from: " << ar << endl; + for (MathArray::size_type i = 0; i + 2 < ar.size(); ++i) { + MathArray::iterator it = ar.begin() + i; + + // is this a limit function? + if (!testSymbol(*it, "lim")) + continue; + + // the next one must be a subscript (without superscript) + MathScriptInset const * sub = (*(it + 1))->asScriptInset(); + if (!sub || !sub->hasDown() || sub->hasUp()) + continue; + + // and it must contain a -> symbol + MathArray const & s = sub->down(); + MathArray::const_iterator st = find_if(s.begin(), s.end(), &testRightArrow); + if (st == s.end()) + continue; + + // the -> splits the subscript int x and x0 + MathArray x = MathArray(s.begin(), st); + MathArray x0 = MathArray(st + 1, s.end()); + + // use something behind the script as core + MathArray f; + MathArray::iterator tt = extractArgument(f, it + 2, ar.end()); + + // cleanup + ar.erase(it + 1, tt); + + // create a proper inset as replacement + *it = MathAtom(new MathLimInset(f, x, x0)); + } + //lyxerr << "\nLimits to: " << ar << endl; +} + + // // combine searches // void extractStructure(MathArray & ar) { + //lyxerr << "\nStructure from: " << ar << endl; + extractIntegrals(ar); + extractSums(ar); + splitScripts(ar); + extractNumbers(ar); extractMatrices(ar); extractDelims(ar); extractFunctions(ar); - extractIntegrals(ar); - extractSums(ar); + extractDets(ar); extractDiff(ar); + extractExps(ar); + extractLims(ar); extractStrings(ar); + //lyxerr << "\nStructure to: " << ar << endl; } @@ -536,17 +820,10 @@ void write(MathArray const & dat, WriteStream & wi) { MathArray ar = dat; extractStrings(ar); + wi.firstitem() = true; for (MathArray::const_iterator it = ar.begin(); it != ar.end(); ++it) { - wi.firstitem = (it == ar.begin()); - MathInset const * p = it->nucleus(); - if (it + 1 != ar.end()) { - if (MathScriptInset const * q = asScript(it)) { - q->write(p, wi); - ++it; - continue; - } - } - p->write(wi); + (*it)->write(wi); + wi.firstitem() = false; } } @@ -558,39 +835,39 @@ void normalize(MathArray const & ar, NormalStream & os) } -void octavize(MathArray const & dat, OctaveStream & os) +void octave(MathArray const & dat, OctaveStream & os) { MathArray ar = dat; extractStructure(ar); - for (MathArray::const_iterator it = ar.begin(); it != ar.end(); ++it) { - MathInset const * p = it->nucleus(); - if (it + 1 != ar.end()) { - if (MathScriptInset const * q = asScript(it)) { - q->octavize(p, os); - ++it; - continue; - } - } - p->octavize(os); - } + for (MathArray::const_iterator it = ar.begin(); it != ar.end(); ++it) + (*it)->octave(os); } -void maplize(MathArray const & dat, MapleStream & os) +void maple(MathArray const & dat, MapleStream & os) { MathArray ar = dat; extractStructure(ar); - for (MathArray::const_iterator it = ar.begin(); it != ar.end(); ++it) { - MathInset const * p = it->nucleus(); - if (it + 1 != ar.end()) { - if (MathScriptInset const * q = asScript(it)) { - q->maplize(p, os); - ++it; - continue; - } - } - p->maplize(os); - } + for (MathArray::const_iterator it = ar.begin(); it != ar.end(); ++it) + (*it)->maple(os); +} + + +void maxima(MathArray const & dat, MaximaStream & os) +{ + MathArray ar = dat; + extractStructure(ar); + for (MathArray::const_iterator it = ar.begin(); it != ar.end(); ++it) + (*it)->maxima(os); +} + + +void mathematica(MathArray const & dat, MathematicaStream & os) +{ + MathArray ar = dat; + extractStructure(ar); + for (MathArray::const_iterator it = ar.begin(); it != ar.end(); ++it) + (*it)->mathematica(os); } @@ -601,21 +878,333 @@ void mathmlize(MathArray const & dat, MathMLStream & os) if (ar.size() == 0) os << ""; else if (ar.size() == 1) - os << ar.begin()->nucleus(); + os << ar.front(); else { os << MTag("mrow"); - for (MathArray::const_iterator it = ar.begin(); it != ar.end(); ++it) { - MathInset const * p = it->nucleus(); - if (it + 1 != ar.end()) { - if (MathScriptInset const * q = asScript(it)) { - q->mathmlize(p, os); - ++it; - continue; - } + for (MathArray::const_iterator it = ar.begin(); it != ar.end(); ++it) + (*it)->mathmlize(os); + os << ETag("mrow"); + } +} + + + + +namespace { + + string captureOutput(string const & cmd, string const & data) + { + string command = "echo '" + data + "' | " + cmd; + lyxerr << "calling: " << command << endl; + cmd_ret const ret = RunCommand(command); + return ret.second; + } + + string::size_type get_matching_brace(string const & str, string::size_type i) + { + int count = 1; + string::size_type n = str.size(); + while (i < n) { + i = str.find_first_of("{}", i+1); + if (i == string::npos) return i; + if (str[i] == '{') + ++count; + else + --count; + if (count == 0) + return i; + } + return string::npos; + } + + string::size_type get_matching_brace_back(string const & str, string::size_type i) + { + int count = 1; + while (i > 0) { + i = str.find_last_of("{}", i-1); + if (i == string::npos) return i; + if (str[i] == '}') + ++count; + else + --count; + if (count == 0) + return i; + } + return string::npos; + } + + MathArray pipeThroughMaxima(string const &, MathArray const & ar) + { + ostringstream os; + MaximaStream ms(os); + ms << ar; + string expr = os.str(); + string const header = "SIMPSUM:true;"; + + string out; + for (int i = 0; i < 100; ++i) { // at most 100 attempts + // try to fix missing '*' the hard way + // + // > echo "2x;" | maxima + // ... + // (C1) Incorrect syntax: x is not an infix operator + // 2x; + // ^ + // + lyxerr << "checking expr: '" << expr << "'" << endl; + string full = header + "tex(" + expr + ");"; + out = captureOutput("maxima", full); + + // leave loop if expression syntax is probably ok + if (out.find("Incorrect syntax") == string::npos) + break; + + // search line with "Incorrect syntax" + istringstream is(out.c_str()); + string line; + while (is) { + getline(is, line); + if (line.find("Incorrect syntax") != string::npos) + break; } - p->mathmlize(os); + + // 2nd next line is the one with caret + getline(is, line); + getline(is, line); + string::size_type pos = line.find('^'); + lyxerr << "found caret at pos: '" << pos << "'" << endl; + if (pos == string::npos || pos < 4) + break; // caret position not found + pos -= 4; // skip the "tex(" part + if (expr[pos] == '*') + break; // two '*' in a row are definitely bad + expr.insert(pos, "*"); } - os << ETag("mrow"); + + std::vector tmp = getVectorFromString(out, "$$"); + if (tmp.size() < 2) + return MathArray(); + + out = subst(tmp[1],"\\>", ""); + lyxerr << "out: '" << out << "'" << endl; + + // Ugly code that tries to make the result prettier + + string::size_type i = out.find("\\mathchoice"); + while (i != string::npos) { + string::size_type j = get_matching_brace(out, i + 12); + string::size_type k = get_matching_brace(out, j + 1); + k = get_matching_brace(out, k + 1); + k = get_matching_brace(out, k + 1); + string mid = out.substr(i + 13,j - i - 13); + if (mid.find("\\over") != string::npos) + mid = '{' + mid + '}'; + out = out.substr(0,i) + + mid + + out.substr(k + 1); + //lyxerr << "out: " << out << endl; + i = out.find("\\mathchoice", i); + break; + } + + i = out.find("\\over"); + while (i != string::npos) { + string::size_type j = get_matching_brace_back(out, i - 1); + if (j == string::npos || j == 0) break; + string::size_type k = get_matching_brace(out, i + 5); + if (k == string::npos || k + 1 == out.size()) break; + out = out.substr(0,j - 1) + + "\\frac" + + out.substr(j,i - j) + + out.substr(i + 5,k - i - 4) + + out.substr(k + 2); + //lyxerr << "out: " << out << endl; + i = out.find("\\over", i + 4); + } + MathArray res; + mathed_parse_cell(res, out); + return res; + } + + + MathArray pipeThroughMaple(string const & extra, MathArray const & ar) + { + string header = "readlib(latex):\n"; + + // remove the \\it for variable names + //"#`latex/csname_font` := `\\it `:" + header += + "`latex/csname_font` := ``:\n"; + + // export matrices in (...) instead of [...] + header += + "`latex/latex/matrix` := " + "subs(`[`=`(`, `]`=`)`," + "eval(`latex/latex/matrix`)):\n"; + + // replace \\cdots with proper '*' + header += + "`latex/latex/*` := " + "subs(`\\,`=`\\cdot `," + "eval(`latex/latex/*`)):\n"; + + // remove spurious \\noalign{\\medskip} in matrix output + header += + "`latex/latex/matrix`:= " + "subs(`\\\\\\\\\\\\noalign{\\\\medskip}` = `\\\\\\\\`," + "eval(`latex/latex/matrix`)):\n"; + + //"#`latex/latex/symbol` " + // " := subs((\\'_\\' = \\'`\\_`\\',eval(`latex/latex/symbol`)): "; + + string trailer = "quit;"; + ostringstream os; + MapleStream ms(os); + ms << ar; + string expr = os.str(); + lyxerr << "ar: '" << ar << "'\n" + << "ms: '" << os.str() << "'" << endl; + + for (int i = 0; i < 100; ++i) { // at most 100 attempts + // try to fix missing '*' the hard way by using mint + // + // ... > echo "1A;" | mint -i 1 -S -s -q + // on line 1: 1A; + // ^ syntax error - + // Probably missing an operator such as * p + // + lyxerr << "checking expr: '" << expr << "'" << endl; + string out = captureOutput("mint -i 1 -S -s -q -q", expr + ';'); + if (out.empty()) + break; // expression syntax is ok + istringstream is(out.c_str()); + string line; + getline(is, line); + if (line.find("on line") != 0) + break; // error message not identified + getline(is, line); + string::size_type pos = line.find('^'); + if (pos == string::npos || pos < 15) + break; // caret position not found + pos -= 15; // skip the "on line ..." part + if (expr[pos] == '*' || (pos > 0 && expr[pos - 1] == '*')) + break; // two '*' in a row are definitely bad + expr.insert(pos, 1, '*'); + } + + string full = "latex(" + extra + '(' + expr + "));"; + string out = captureOutput("maple -q", header + full + trailer); + + // change \_ into _ + + // + MathArray res; + mathed_parse_cell(res, out); + return res; } + + + MathArray pipeThroughOctave(string const &, MathArray const & ar) + { + ostringstream os; + OctaveStream vs(os); + vs << ar; + string expr = os.str(); + string out; + + lyxerr << "pipe: ar: '" << ar << "'\n" + << "pipe: expr: '" << expr << "'" << endl; + + for (int i = 0; i < 100; ++i) { // at most 100 attempts + // + // try to fix missing '*' the hard way + // parse error: + // >>> ([[1 2 3 ];[2 3 1 ];[3 1 2 ]])([[1 2 3 ];[2 3 1 ];[3 1 2 ]]) + // ^ + // + lyxerr << "checking expr: '" << expr << "'" << endl; + out = captureOutput("octave -q 2>&1", expr); + lyxerr << "checking out: '" << out << "'" << endl; + + // leave loop if expression syntax is probably ok + if (out.find("parse error:") == string::npos) + break; + + // search line with single caret + istringstream is(out.c_str()); + string line; + while (is) { + getline(is, line); + lyxerr << "skipping line: '" << line << "'" << endl; + if (line.find(">>> ") != string::npos) + break; + } + + // found line with error, next line is the one with caret + getline(is, line); + string::size_type pos = line.find('^'); + lyxerr << "caret line: '" << line << "'" << endl; + lyxerr << "found caret at pos: '" << pos << "'" << endl; + if (pos == string::npos || pos < 4) + break; // caret position not found + pos -= 4; // skip the ">>> " part + if (expr[pos] == '*') + break; // two '*' in a row are definitely bad + expr.insert(pos, 1, '*'); + } + + if (out.size() < 6) + return MathArray(); + + // remove 'ans = ' + out = out.substr(6); + + // parse output as matrix or single number + MathAtom at(new MathArrayInset("array", out)); + MathArrayInset const * mat = at->asArrayInset(); + MathArray res; + if (mat->ncols() == 1 && mat->nrows() == 1) + res.append(mat->cell(0)); + else { + res.push_back(MathAtom(new MathDelimInset("(", ")"))); + res.back().nucleus()->cell(0).push_back(at); + } + return res; + } + } + +MathArray pipeThroughExtern(string const & lang, string const & extra, + MathArray const & ar) +{ + if (lang == "octave") + return pipeThroughOctave(extra, ar); + + if (lang == "maxima") + return pipeThroughMaxima(extra, ar); + + if (lang == "maple") + return pipeThroughMaple(extra, ar); + + // create normalized expression + ostringstream os; + NormalStream ns(os); + os << '[' << extra << ' '; + ns << ar; + os << ']'; + string data = os.str(); + + // search external script + string file = LibFileSearch("mathed", "extern_" + lang); + if (file.empty()) { + lyxerr << "converter to '" << lang << "' not found" << endl; + return MathArray(); + } + + // run external sript + string out = captureOutput(file, data); + MathArray res; + mathed_parse_cell(res, out); + return res; +}