-
// This file contains most of the magic that extracts "context
// information" from the unstructered layout-oriented stuff in an
// MathArray.
-#include <algorithm>
+#include <config.h>
+#include "math_amsarrayinset.h"
+#include "math_arrayinset.h"
#include "math_charinset.h"
#include "math_deliminset.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_unknowninset.h"
+#include "math_parser.h"
+#include "Lsstream.h"
#include "debug.h"
+#include "support/lyxlib.h"
+#include "support/systemcall.h"
+#include "support/filetools.h"
+
+#include <algorithm>
+
+using std::ostream;
+using std::istringstream;
+using std::find_if;
+using std::endl;
-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;
}
-MathScriptInset const * asScript(MathArray::const_iterator it)
+// define a function for tests
+typedef bool TestItemFunc(MathAtom const &);
+
+// define a function for replacing subexpressions
+typedef MathInset * 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)
{
- if (it->nucleus()->asScriptInset())
- return 0;
- ++it;
- if (!it->nucleus())
- return 0;
- return it->nucleus()->asScriptInset();
+ // 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.
+// returns position behind the argument
+MathArray::iterator extractArgument(MathArray & ar,
+ MathArray::iterator pos, MathArray::iterator last, string const & = "")
+{
+ // nothing to get here
+ if (pos == last)
+ return pos;
+
+ // something deliminited _is_ an argument
+ if ((*pos)->asDelimInset()) {
+ ar.push_back(*pos);
+ return pos + 1;
+ }
+
+ // always take the first thing, no matter what it is
+ ar.push_back(*pos);
+
+ // go ahead if possible
+ ++pos;
+ if (pos == last)
+ return pos;
+
+ // if the next item is a subscript, it most certainly belongs to the
+ // thing we have
+ extractScript(ar, pos, last);
+ if (pos == last)
+ return pos;
+
+ // but it might be more than that.
+ // FIXME: not implemented
+ //for (MathArray::iterator it = pos + 1; it != last; ++it) {
+ // // always take the first thing, no matter
+ // if (it == pos) {
+ // ar.push_back(*it);
+ // continue;
+ // }
+ //}
+ return pos;
+}
+
// 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;
- }
+ 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)
+MathInset const * singleItem(MathArray const & ar)
{
return ar.size() == 1 ? ar.begin()->nucleus() : 0;
}
void extractMatrices(MathArray & ar)
{
- lyxerr << "\nMatrices from: " << ar << "\n";
+ //lyxerr << "\nMatrices from: " << ar << "\n";
+ // first pass for explicitly delimited stuff
for (MathArray::iterator it = ar.begin(); it != ar.end(); ++it) {
- MathDelimInset * del = (*it)->asDelimInset();
+ MathDelimInset const * del = (*it)->asDelimInset();
if (!del)
continue;
- MathInset * arr = singleItem(del->cell(0));
- if (!arr || !arr->asArrayInset())
+ MathInset const * arr = singleItem(del->cell(0));
+ if (!arr || !arr->asGridInset())
+ continue;
+ *it = MathAtom(new MathMatrixInset(*(arr->asGridInset())));
+ }
+
+ // second pass for AMS "pmatrix" etc
+ for (MathArray::iterator it = ar.begin(); it != ar.end(); ++it) {
+ MathAMSArrayInset const * ams = (*it)->asAMSArrayInset();
+ if (!ams)
continue;
- *it = MathAtom(new MathMatrixInset(*(arr->asArrayInset())));
- lyxerr << "\nMatrices to: " << ar << "\n";
+ *it = MathAtom(new MathMatrixInset(*ams));
}
-}
+ //lyxerr << "\nMatrices to: " << ar << "\n";
+}
+
// convert this inset somehow to a string
-string extractString(MathInset * p)
+bool extractString(MathAtom const & at, string & str)
{
- if (p && p->getChar())
- return string(1, p->getChar());
- if (p && p->asStringInset())
- return p->asStringInset()->str();
- return string();
+ if (at->getChar()) {
+ str = string(1, at->getChar());
+ return true;
+ }
+ if (at->asStringInset()) {
+ str = at->asStringInset()->str();
+ return true;
+ }
+ return false;
}
-// define a function for tests
-typedef bool TestItemFunc(MathInset *);
+// convert this inset somehow to a number
+bool extractNumber(MathArray const & ar, int & i)
+{
+ istringstream is(charSequence(ar.begin(), ar.end()).c_str());
+ is >> i;
+ return is;
+}
-// define a function for replacing subexpressions
-typedef MathInset * ReplaceArgumentFunc(const MathArray & ar);
+
+bool extractNumber(MathArray const & ar, double & d)
+{
+ istringstream is(charSequence(ar.begin(), ar.end()).c_str());
+ is >> d;
+ return is;
+}
+
+
+bool testString(MathAtom const & at, const string & str)
+{
+ string s;
+ return extractString(at, s) && str == s;
+}
// search end of nested sequence
)
{
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;
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(*it))
continue;
// search end of sequence
// replace the original stuff by the new inset
ar.erase(it + 1, jt + 1);
- (*it).reset(p);
+ *it = MathAtom(p);
+ }
+}
+
+
+
+//
+// split scripts into seperate super- and subscript insets. sub goes in
+// front of super...
+//
+
+void splitScripts(MathArray & ar)
+{
+ //lyxerr << "\nScripts from: " << ar << "\n";
+ for (MathArray::size_type i = 0; i < ar.size(); ++i) {
+ MathArray::iterator it = ar.begin() + i;
+
+ // is this script inset?
+ MathScriptInset * p = (*it).nucleus()->asScriptInset();
+ if (!p)
+ continue;
+
+ // no problem if we don't have both...
+ if (!p->hasUp() || !p->hasDown())
+ continue;
+
+ // create extra script inset and move superscript over
+ MathScriptInset * q = new MathScriptInset;
+ q->ensure(true);
+ std::swap(q->up(), p->up());
+ p->removeScript(true);
+
+ // insert new inset behind
+ ++i;
+ ar.insert(i, MathAtom(q));
}
-}
+ //lyxerr << "\nScripts to: " << ar << "\n";
+}
+
+
+//
+// extract exp(...)
+//
+
+void extractExps(MathArray & ar)
+{
+ //lyxerr << "\nExps from: " << ar << "\n";
+
+ for (MathArray::size_type i = 0; i + 1 < ar.size(); ++i) {
+ MathArray::iterator it = ar.begin() + i;
+
+ // is this 'e'?
+ MathCharInset const * p = (*it)->asCharInset();
+ if (!p || p->getChar() != 'e')
+ continue;
+
+ // we need an exponent but no subscript
+ MathScriptInset const * sup = (*(it + 1))->asScriptInset();
+ if (!sup || sup->hasDown())
+ continue;
+
+ // create a proper exp-inset as replacement
+ *it = MathAtom(new MathExFuncInset("exp", sup->cell(1)));
+ ar.erase(it + 1);
+ }
+ //lyxerr << "\nExps to: " << ar << "\n";
+}
+
+
+//
+// extract det(...) from |matrix|
+//
+void extractDets(MathArray & ar)
+{
+ //lyxerr << "\ndet from: " << ar << "\n";
+ 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 << "\n";
+}
+
+
+//
+// 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 << "\n";
+ 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 << "\n";
+}
+
//
// search deliminiters
//
-bool openParanTest(MathInset * p)
+bool testOpenParan(MathAtom const & at)
{
- return extractString(p) == "(";
+ return testString(at, "(");
}
-bool closeParanTest(MathInset * p)
+bool testCloseParan(MathAtom const & at)
{
- return extractString(p) == ")";
+ return testString(at, ")");
}
-MathInset * delimReplacement(const MathArray & ar)
+MathInset * replaceDelims(const MathArray & ar)
{
- MathDelimInset * del = new MathDelimInset("(", ")");
- del->cell(0) = ar;
- return del;
+ return 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";
+void extractDelims(MathArray & ar)
+{
+ //lyxerr << "\nDelims from: " << ar << "\n";
+ replaceNested(ar, testOpenParan, testCloseParan, replaceDelims);
+ //lyxerr << "\nDelims to: " << ar << "\n";
}
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 << "\n";
+ 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
}
- // jt points now to the "argument". Since we had run "extractDelims"
- // before, this could be a single argument only. Get hold of this.
- MathArray arg;
- MathDelimInset * del = (*jt)->asDelimInset();
- if (del && del->isParanthesis())
- arg = del->cell(0);
- else
- arg.push_back(*jt);
+ // 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(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(new MathExFuncInset(func->name(), arg));
-
+ *it = MathAtom(p);
+
// remove the source of the argument from the array
- ar.erase(jt);
- lyxerr << "\nFunctions to: " << ar << "\n";
+ ar.erase(it + 1, st);
+
+ // re-insert exponent
+ ar.insert(i + 1, exp);
+ //lyxerr << "\nFunctions to: " << ar << "\n";
}
-}
+}
//
// search integrals
//
-bool intSymbolTest(MathInset * p)
+bool testSymbol(MathAtom const & at, string const & name)
{
- return p->asSymbolInset() && p->asSymbolInset()->name() == "int";
+ return at->asSymbolInset() && at->asSymbolInset()->name() == name;
}
-bool differentialTest(MathInset * p)
+bool testIntSymbol(MathAtom const & at)
{
- return extractString(p) == "d";
+ return testSymbol(at, "int");
+}
+
+
+bool testIntegral(MathAtom const & at)
+{
+ return
+ testIntSymbol(at) ||
+ ( at->asScriptInset()
+ && at->asScriptInset()->nuc().size()
+ && testIntSymbol(at->asScriptInset()->nuc().back()) );
+}
+
+
+
+bool testIntDiff(MathAtom const & at)
+{
+ return testString(at, "d");
}
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 << "\n";
+ 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, differentialTest);
+ 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->core(MathArray(st + 1, jt));
- } else {
- p->core(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
- MathArray ind;
- if (jt + 1 != ar.end()) {
- ind.push_back(*(jt + 1));
- ++jt;
- }
- ar.erase(it + 1, jt + 1);
+ // use the "thing" behind the 'd' as differential
+ MathArray::iterator tt = extractArgument(p->cell(1), jt + 1, ar.end());
- p->index(ind);
- (*it).reset(p);
+ // remove used parts
+ ar.erase(it + 1, tt);
+ *it = MathAtom(p);
}
- lyxerr << "\nIntegrals to: " << ar << "\n";
+ //lyxerr << "\nIntegrals to: " << ar << "\n";
}
// 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 extractString(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 << "\n";
+ 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(*it))
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 = (*it)->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->index(MathArray(ar.begin(), it));
- ar.erase(ar.begin(), it + 1);
- } else {
- // use everything as summation index
- p->index(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 the atom behind the script as core
- MathArray ind;
- if (st != ar.end()) {
- MathArray core;
- core.push_back(*st);
- p->core(core);
- ++st;
+ // 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 = MathAtom(p);
+ }
+ //lyxerr << "\nSums to: " << ar << "\n";
+}
+
+
+//
+// search differential stuff
+//
+
+// tests for 'd' or '\partial'
+bool testDiffItem(MathAtom const & at)
+{
+ return testString(at, "d");
+}
+
+
+bool testDiffArray(MathArray const & ar)
+{
+ return ar.size() && testDiffItem(ar.front());
+}
+
+
+bool testDiffFrac(MathAtom const & at)
+{
+ return
+ 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(); ++i) {
+ MathArray::iterator it = ar.begin() + i;
+
+ // is this a "differential fraction"?
+ if (!testDiffFrac(*it))
+ continue;
+
+ MathFracInset const * f = (*it)->asFracInset();
+ if (!f) {
+ lyxerr << "should not happen\n";
+ continue;
+ }
+
+ // create a proper diff inset
+ 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;
}
- ar.erase(it + 1, st);
- (*it).reset(p);
+
+ // cleanup
+ ar.erase(it + 1, jt);
+ *it = MathAtom(diff);
}
- lyxerr << "\nSums to: " << ar << "\n";
+ //lyxerr << "\nDiffs to: " << ar << "\n";
+}
+
+
+//
+// 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 << "\n";
+ 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 << "\n";
+}
+
+
+//
+// combine searches
+//
+
void extractStructure(MathArray & ar)
{
+ 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);
}
{
MathArray ar = dat;
extractStrings(ar);
+ wi.firstitem() = true;
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->write(p, wi);
- ++it;
- continue;
- }
- }
- p->write(wi);
+ (*it)->write(wi);
+ wi.firstitem() = false;
}
}
{
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)->octavize(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)->maplize(os);
+}
+
+
+void mathematicize(MathArray const & dat, MathematicaStream & os)
+{
+ MathArray ar = dat;
+ extractStructure(ar);
+ for (MathArray::const_iterator it = ar.begin(); it != ar.end(); ++it)
+ (*it)->mathematicize(os);
}
if (ar.size() == 0)
os << "<mrow/>";
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 outfile = lyx::tempName(string(), "mathextern");
+ string full = "echo '" + data + "' | (" + cmd + ") > " + outfile;
+ lyxerr << "calling: " << full << endl;
+ Systemcall dummy;
+ dummy.startscript(Systemcall::Wait, full);
+ string out = GetFileContents(outfile);
+ lyx::unlink(outfile);
+ lyxerr << "result: '" << out << "'" << endl;
+ return out;
+ }
+
+
+ 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().c_str();
+ lyxerr << "ar: '" << ar << "'\n";
+ lyxerr << "ms: '" << os.str() << "'\n";
+
+ 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 << "'\n";
+ 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, "*");
+ }
+
+ 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().c_str();
+ string out;
+
+ lyxerr << "pipe: ar: '" << ar << "'\n";
+ lyxerr << "pipe: expr: '" << expr << "'\n";
+
+ 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 << "'\n";
+ out = captureOutput("octave -q 2>&1", expr);
+ lyxerr << "checking out: '" << out << "'\n";
+
+ // 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 << "'\n";
+ if (line.find(">>> ") != string::npos)
+ break;
}
- p->mathmlize(os);
+
+ // found line with error, next line is the one with caret
+ getline(is, line);
+ string::size_type pos = line.find('^');
+ lyxerr << "caret line: '" << line << "'\n";
+ lyxerr << "found caret at pos: '" << pos << "'\n";
+ 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, "*");
}
- os << ETag("mrow");
+
+ 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.nucleus()->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 == "maple")
+ return pipeThroughMaple(extra, ar);
+
+ // create normalized expression
+ ostringstream os;
+ NormalStream ns(os);
+ os << "[" << extra << ' ';
+ ns << ar;
+ os << "]";
+ string data = os.str().c_str();
+
+ // search external script
+ string file = LibFileSearch("mathed", "extern_" + lang);
+ if (file.empty()) {
+ lyxerr << "converter to '" << lang << "' not found\n";
+ return MathArray();
+ }
+
+ // run external sript
+ string out = captureOutput(file, data);
+ MathArray res;
+ mathed_parse_cell(res, out);
+ return res;
+}
projects / lyx.git / blobdiff