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MathMLbuilder.c
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Sun Oct 29 10:47:36 2000 UTC (23 years, 7 months ago) by
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Improvements to the MathML implementation.
- positioning of some elements in the Structure view
- positionning and size of some elements in the main view
(large operators: ∑ ∏ vertical bars, upper limit of
integrals, etc.)
- the obsolete mchar element has been removed
- input of character entities (Menu Types/Math/Character)
VQ
/*
*
* (c) COPYRIGHT MIT and INRIA, 1996-2000
* Please first read the full copyright statement in file COPYRIGHT.
*
*/
/*
*
* MathMLbuilder
*
* Author: V. Quint
*/
#define THOT_EXPORT extern
#include "amaya.h"
#include "css.h"
#include "html2thot_f.h"
#include "Xml2thot_f.h"
#include "MathML.h"
#include "parser.h"
#include "styleparser_f.h"
#include "style.h"
#include "undo.h"
XmlEntity MathEntityTable[] =
{
/* This table MUST be in alphabetical order */
/* This table contains characters from the Symbol font plus some
specific MathML entities */
{TEXT("Agr"), 65, 'G'},
{TEXT("And"), 217, 'G'},
{TEXT("ApplyFunction"), 32, 'L'}, /* render as white space */
{TEXT("Backslash"), 92, 'L'},
{TEXT("Bgr"), 66, 'G'},
{TEXT("Cap"), 199, 'G'},
{TEXT("CenterDot"), 215, 'G'},
{TEXT("CirclePlus"), 197, 'G'},
{TEXT("CircleTimes"), 196, 'G'},
{TEXT("Colon"), 58, 'G'},
{TEXT("Congruent"), 64, 'G'},
{TEXT("Cup"), 200, 'G'},
{TEXT("Del"), 209, 'G'},
{TEXT("Delta"), 68, 'G'},
{TEXT("Diamond"), 168, 'G'},
{TEXT("DifferentialD"), 100, 'L'},
{TEXT("DoubleDownArrow"), 223, 'G'},
{TEXT("DoubleLeftArrow"), 220, 'G'},
{TEXT("DoubleLeftRightArrow"), 219, 'G'},
{TEXT("DoubleRightArrow"), 222, 'G'},
{TEXT("DoubleUpArrow"), 221, 'G'},
{TEXT("DownArrow"), 175, 'G'},
{TEXT("DownTee"), 94, 'G'},
{TEXT("EEgr"), 72, 'G'},
{TEXT("Egr"), 69, 'G'},
{TEXT("Element"), 206, 'G'},
{TEXT("Equal"), 61, 'L'},
{TEXT("EqualTilde"), 64, 'G'},
{TEXT("Exists"), 36, 'G'},
{TEXT("ExponentialE"), 101, 'L'},
{TEXT("ForAll"), 34, 'G'},
{TEXT("Gamma"), 71, 'G'},
{TEXT("GreaterEqual"), 179, 'G'},
{TEXT("Hat"), 94, 'L'},
{TEXT("Igr"), 73, 'G'},
{TEXT("ImaginaryI"), 105, 'L'},
{TEXT("Integral"), 242, 'G'},
{TEXT("Intersection"), 199, 'G'},
{TEXT("InvisibleComma"), 129, 'L'},
{TEXT("InvisibleTimes"), 0, SPACE},
{TEXT("Kgr"), 75, 'G'},
{TEXT("KHgr"), 67, 'G'},
{TEXT("Lambda"), 76, 'G'},
{TEXT("LeftArrow"), 172, 'G'},
{TEXT("LeftCeiling"), 233, 'G'},
{TEXT("LeftFloor"), 235, 'G'},
{TEXT("LeftRightArrow"), 171, 'G'},
{TEXT("Mgr"), 77, 'G'},
{TEXT("Ngr"), 78, 'G'},
{TEXT("NonBreakingSpace"), 160, 'L'},
{TEXT("Not"), 216, 'G'},
{TEXT("NotElement"), 207, 'G'},
{TEXT("NotEqual"), 185, 'G'},
{TEXT("NotSubset"), 203, 'G'},
{TEXT("Ogr"), 79, 'G'},
{TEXT("Omega"), 87, 'G'},
{TEXT("Or"), 218, 'G'},
{TEXT("OverBar"), 45, 'G'},
{TEXT("PI"), 213, 'G'},
{TEXT("PartialD"), 182, 'G'},
{TEXT("Phi"), 70, 'G'},
{TEXT("Pi"), 80, 'G'},
{TEXT("PlusMinus"), 177, 'G'},
{TEXT("Prime"), 178, 'G'},
{TEXT("Product"), 213, 'G'},
{TEXT("Proportional"), 181, 'G'},
{TEXT("Psi"), 89, 'G'},
{TEXT("RightAngleBracket"), 241, 'G'},
{TEXT("RightCeiling"), 249, 'G'},
{TEXT("RightFloor"), 251, 'G'},
{TEXT("Rgr"), 82, 'G'},
{TEXT("RightArrow"), 174, 'G'},
{TEXT("Sigma"), 83, 'G'},
{TEXT("Sol"), 164, 'G'},
{TEXT("Star"), 42, 'L'},
{TEXT("Subset"), 204, 'G'},
{TEXT("SubsetEqual"), 205, 'G'},
{TEXT("SuchThat"), 39, 'G'},
{TEXT("Sum"), 229, 'G'},
{TEXT("Superset"), 201, 'G'},
{TEXT("SupersetEqual"), 202, 'G'},
{TEXT("Tgr"), 84, 'G'},
{TEXT("Therefore"), 92, 'G'},
{TEXT("Theta"), 81, 'G'},
{TEXT("ThickSpace"), 130, 'L'},
{TEXT("ThinSpace"), 129, 'L'},
{TEXT("Tilde"), 126, 'L'},
{TEXT("TripleDot"), 188, 'G'},
{TEXT("UnderBar"), 45, 'G'},
{TEXT("Union"), 200, 'G'},
{TEXT("UpArrow"), 173, 'G'},
{TEXT("Upsi"), 85, 'G'},
{TEXT("Upsi1"), 161, 'G'},
{TEXT("Vee"), 218, 'G'},
{TEXT("Verbar"), 189, 'G'},
{TEXT("VerticalBar"), 124, 'L'},
{TEXT("Xi"), 88, 'G'},
{TEXT("Zgr"), 90, 'G'},
{TEXT("af"), 32, 'L'}, /* render as white space */
{TEXT("aleph"), 192, 'G'},
{TEXT("alpha"), 97, 'G'},
{TEXT("and"), 217, 'G'},
{TEXT("angle"), 208, 'G'},
{TEXT("ap"), 187, 'G'},
{TEXT("beta"), 98, 'G'},
{TEXT("bot"), 94, 'G'},
{TEXT("bottom"), 94, 'G'},
{TEXT("bull"), 183, 'G'},
{TEXT("cap"), 199, 'G'},
{TEXT("chi"), 99, 'G'},
{TEXT("circ"), 94, 'L'},
{TEXT("clubs"), 167, 'G'},
{TEXT("cong"), 64, 'G'},
{TEXT("copysf"), 211, 'G'},
{TEXT("copyssf"), 227, 'G'},
{TEXT("cr"), 191, 'G'},
{TEXT("cup"), 200, 'G'},
{TEXT("dArr"), 223, 'G'},
{TEXT("darr"), 175, 'G'},
{TEXT("dd"), 100, 'L'},
{TEXT("deg"), 176, 'G'},
{TEXT("delta"), 100, 'G'},
{TEXT("diams"), 168, 'G'},
{TEXT("divide"), 184, 'G'},
{TEXT("dtri"), 209, 'G'},
{TEXT("ee"), 101, 'L'},
{TEXT("empty"), 198, 'G'},
{TEXT("emptyset"), 198, 'G'},
{TEXT("emsp"), 32, 'G'},
{TEXT("epsiv"), 101, 'G'},
{TEXT("equiv"), 186, 'G'},
{TEXT("eta"), 104, 'G'},
{TEXT("exist"), 36, 'G'},
{TEXT("florin"), 166, 'G'},
{TEXT("forall"), 34, 'G'},
{TEXT("gamma"), 103, 'G'},
{TEXT("ge"), 179, 'G'},
{TEXT("geq"), 179, 'G'},
{TEXT("gt"), 62, 'L'},
{TEXT("hearts"), 169, 'G'},
{TEXT("horbar"), 190, 'G'},
{TEXT("iff"), 219, 'G'},
{TEXT("ifraktur"), 193, 'G'},
{TEXT("in"), 206, 'G'},
{TEXT("infin"), 165, 'G'},
{TEXT("int"), 242, 'G'},
{TEXT("iota"), 105, 'G'},
{TEXT("isin"), 206, 'G'},
{TEXT("it"), 0, SPACE},
{TEXT("kappa"), 107, 'G'},
{TEXT("lArr"), 220, 'G'},
{TEXT("lambda"), 108, 'G'},
{TEXT("lang"), 225, 'G'},
{TEXT("langle"), 225, 'G'},
{TEXT("larr"), 172, 'G'},
{TEXT("lbrace"), 123, 'L'},
{TEXT("lceil"), 233, 'G'},
{TEXT("lcub"), 123, 'L'},
{TEXT("le"), 163, 'G'},
{TEXT("leq"), 163, 'G'},
{TEXT("lfloor"), 235, 'G'},
{TEXT("lowbar"), 95, 'G'},
{TEXT("loz"), 224, 'G'},
{TEXT("lrArr"), 219, 'G'},
{TEXT("lrarr"), 171, 'G'},
{TEXT("lsqb"), 91, 'G'},
{TEXT("lt"), 60, 'L'},
{TEXT("middot"), 215, 'G'},
{TEXT("mldr"), 188, 'G'},
{TEXT("mu"), 109, 'G'},
{TEXT("nabla"), 209, 'G'},
{TEXT("nbsp"), 160, 'L'},
{TEXT("ne"), 185, 'G'},
{TEXT("neq"), 185, 'G'},
{TEXT("not"), 216, 'G'},
{TEXT("notin"), 207, 'G'},
{TEXT("nu"), 110, 'G'},
{TEXT("ogr"), 111, 'G'},
{TEXT("omega"), 119, 'G'},
{TEXT("oplus"), 197, 'G'},
{TEXT("or"), 218, 'G'},
{TEXT("otimes"), 196, 'G'},
{TEXT("part"), 182, 'G'},
{TEXT("perp"), 94, 'G'},
{TEXT("phi"), 102, 'G'},
{TEXT("phiv"), 106, 'G'},
{TEXT("pi"), 112, 'G'},
{TEXT("piv"), 118, 'G'},
{TEXT("prime"), 162, 'G'},
{TEXT("prop"), 181, 'G'},
{TEXT("psi"), 121, 'G'},
{TEXT("rArr"), 222, 'G'},
{TEXT("radic"), 214, 'G'},
{TEXT("rang"), 241, 'G'},
{TEXT("rangle"), 241, 'G'},
{TEXT("rarr"), 174, 'G'},
{TEXT("rbrace"), 125, 'L'},
{TEXT("rceil"), 249, 'G'},
{TEXT("rcub"), 125, 'L'},
{TEXT("rdquo"), 178, 'G'},
{TEXT("regsf"), 210, 'G'},
{TEXT("regssf"), 226, 'G'},
{TEXT("rfloor"), 251, 'G'},
{TEXT("rfraktur"), 194, 'G'},
{TEXT("rho"), 114, 'G'},
{TEXT("rsqb"), 93, 'G'},
{TEXT("sigma"), 115, 'G'},
{TEXT("sigmav"), 86, 'G'},
{TEXT("spades"), 170, 'G'},
{TEXT("sub"), 204, 'G'},
{TEXT("sube"), 205, 'G'},
{TEXT("subne"), 203, 'G'},
{TEXT("subset"), 204, 'G'},
{TEXT("sum"), 229, 'G'},
{TEXT("sup"), 201, 'G'},
{TEXT("supe"), 202, 'G'},
{TEXT("supset"), 201, 'G'},
{TEXT("supseteq"), 202, 'G'},
{TEXT("supseteqq"), 202, 'G'},
{TEXT("tau"), 116, 'G'},
{TEXT("there4"), 92, 'G'},
{TEXT("therefore"), 92, 'G'},
{TEXT("theta"), 113, 'G'},
{TEXT("thetav"), 74, 'G'},
{TEXT("thickspace"), 32, 'L'},
{TEXT("times"), 180, 'G'},
{TEXT("trade"), 212, 'G'},
{TEXT("tradesf"), 212, 'G'},
{TEXT("tradessf"), 228, 'G'},
{TEXT("uArr"), 221, 'G'},
{TEXT("uarr"), 173, 'G'},
{TEXT("upsi"), 117, 'G'},
{TEXT("vee"), 218, 'G'},
{TEXT("weierp"), 195, 'G'},
{TEXT("xi"), 120, 'G'},
{TEXT("zeta"), 122, 'G'},
{TEXT("zzzz"), -1, SPACE} /* this last entry is required */
};
/* mapping table of attribute values */
static AttrValueMapping MathMLAttrValueMappingTable[] =
{
{MathML_ATTR_accent, TEXT("true"), MathML_ATTR_accent_VAL_true},
{MathML_ATTR_accent, TEXT("false"), MathML_ATTR_accent_VAL_false},
{MathML_ATTR_accentunder, TEXT("true"), MathML_ATTR_accentunder_VAL_true},
{MathML_ATTR_accentunder, TEXT("false"), MathML_ATTR_accentunder_VAL_false},
{MathML_ATTR_bevelled, TEXT("true"), MathML_ATTR_bevelled_VAL_true},
{MathML_ATTR_bevelled, TEXT("false"), MathML_ATTR_bevelled_VAL_false},
{MathML_ATTR_denomalign, TEXT("center"), MathML_ATTR_denomalign_VAL_center_},
{MathML_ATTR_denomalign, TEXT("left"), MathML_ATTR_denomalign_VAL_left_},
{MathML_ATTR_denomalign, TEXT("right"), MathML_ATTR_denomalign_VAL_right_},
{MathML_ATTR_display, TEXT("block"), MathML_ATTR_display_VAL_block},
{MathML_ATTR_display, TEXT("display"), MathML_ATTR_display_VAL_block},
{MathML_ATTR_display, TEXT("inline"), MathML_ATTR_display_VAL_inline_},
{MathML_ATTR_displaystyle, TEXT("true"), MathML_ATTR_displaystyle_VAL_true},
{MathML_ATTR_displaystyle, TEXT("false"), MathML_ATTR_displaystyle_VAL_false},
{MathML_ATTR_edge, TEXT("left"), MathML_ATTR_edge_VAL_left_},
{MathML_ATTR_edge, TEXT("right"), MathML_ATTR_edge_VAL_right_},
{MathML_ATTR_fence, TEXT("true"), MathML_ATTR_fence_VAL_true},
{MathML_ATTR_fence, TEXT("false"), MathML_ATTR_fence_VAL_false},
{MathML_ATTR_fontstyle, TEXT("italic"), MathML_ATTR_fontstyle_VAL_italic},
{MathML_ATTR_fontstyle, TEXT("normal"), MathML_ATTR_fontstyle_VAL_normal_},
{MathML_ATTR_fontweight, TEXT("normal"), MathML_ATTR_fontweight_VAL_normal_},
{MathML_ATTR_fontweight, TEXT("bold"), MathML_ATTR_fontweight_VAL_bold_},
{MathML_ATTR_form, TEXT("prefix"), MathML_ATTR_form_VAL_prefix},
{MathML_ATTR_form, TEXT("infix"), MathML_ATTR_form_VAL_infix},
{MathML_ATTR_form, TEXT("postfix"), MathML_ATTR_form_VAL_postfix},
{MathML_ATTR_frame, TEXT("none"), MathML_ATTR_frame_VAL_none_},
{MathML_ATTR_frame, TEXT("solid"), MathML_ATTR_frame_VAL_solid_},
{MathML_ATTR_frame, TEXT("dashed"), MathML_ATTR_frame_VAL_dashed_},
{MathML_ATTR_largeop, TEXT("true"), MathML_ATTR_largeop_VAL_true},
{MathML_ATTR_largeop, TEXT("false"), MathML_ATTR_largeop_VAL_false},
{MathML_ATTR_movablelimits, TEXT("true"), MathML_ATTR_movablelimits_VAL_true},
{MathML_ATTR_movablelimits, TEXT("false"), MathML_ATTR_movablelimits_VAL_false},
{MathML_ATTR_notation, TEXT("longdiv"), MathML_ATTR_notation_VAL_longdiv},
{MathML_ATTR_notation, TEXT("actuarial"), MathML_ATTR_notation_VAL_actuarial},
{MathML_ATTR_notation, TEXT("radical"), MathML_ATTR_notation_VAL_radical},
{MathML_ATTR_numalign, TEXT("center"), MathML_ATTR_numalign_VAL_center_},
{MathML_ATTR_numalign, TEXT("left"), MathML_ATTR_numalign_VAL_left_},
{MathML_ATTR_numalign, TEXT("right"), MathML_ATTR_numalign_VAL_right_},
{MathML_ATTR_overflow, TEXT("scroll"), MathML_ATTR_overflow_VAL_scroll},
{MathML_ATTR_overflow, TEXT("elide"), MathML_ATTR_overflow_VAL_elide},
{MathML_ATTR_overflow, TEXT("truncate"), MathML_ATTR_overflow_VAL_truncate},
{MathML_ATTR_overflow, TEXT("scale"), MathML_ATTR_overflow_VAL_scale_},
{MathML_ATTR_separator, TEXT("true"), MathML_ATTR_separator_VAL_true},
{MathML_ATTR_separator, TEXT("false"), MathML_ATTR_separator_VAL_false},
{MathML_ATTR_side, TEXT("left"), MathML_ATTR_side_VAL_left_},
{MathML_ATTR_side, TEXT("leftoverlap"), MathML_ATTR_side_VAL_leftoverlap},
{MathML_ATTR_side, TEXT("right"), MathML_ATTR_side_VAL_right_},
{MathML_ATTR_side, TEXT("rightoverlap"), MathML_ATTR_side_VAL_rightoverlap},
{MathML_ATTR_stretchy, TEXT("true"), MathML_ATTR_stretchy_VAL_true},
{MathML_ATTR_stretchy, TEXT("false"), MathML_ATTR_stretchy_VAL_false},
{MathML_ATTR_symmetric, TEXT("true"), MathML_ATTR_symmetric_VAL_true},
{MathML_ATTR_symmetric, TEXT("false"), MathML_ATTR_symmetric_VAL_false},
{MathML_ATTR_xml_space, TEXT("default"), MathML_ATTR_xml_space_VAL_xml_space_default},
{MathML_ATTR_xml_space, TEXT("preserve"), MathML_ATTR_xml_space_VAL_xml_space_preserve},
{0, TEXT(""), 0} /* Last entry. Mandatory */
};
#define MaxMsgLength 200
#include "HTMLtable_f.h"
#include "Mathedit_f.h"
#include "XMLparser_f.h"
#include "styleparser_f.h"
#include "fetchXMLname_f.h"
/*----------------------------------------------------------------------
MapMathMLAttribute
Search in the Attribute Mapping Table the entry for the
attribute of name Attr and returns the corresponding Thot attribute type.
----------------------------------------------------------------------*/
#ifdef __STDC__
void MapMathMLAttribute (CHAR_T *attrName, AttributeType *attrType, STRING elementName, Document doc)
#else
void MapMathMLAttribute (attrName, attrType, elementName, doc)
STRING attrName;
AttributeType *attrType;
STRING elementName;
Document doc;
#endif
{
attrType->AttrSSchema = GetMathMLSSchema (doc);
MapXMLAttribute (MATH_TYPE, attrName, elementName, doc, &(attrType->AttrTypeNum));
}
/*----------------------------------------------------------------------
MapMathMLAttributeValue
Search in the Attribute Value Mapping Table the entry for the attribute
ThotAtt and its value AttrVal. Returns the corresponding Thot value.
----------------------------------------------------------------------*/
#ifdef __STDC__
void MapMathMLAttributeValue (STRING AttrVal,
AttributeType attrType,
int *value)
#else
void MapMathMLAttributeValue (AttrVal, attrType, value)
STRING AttrVal;
AttributeType attrType;
int *value;
#endif
{
int i;
*value = 0;
i = 0;
while (MathMLAttrValueMappingTable[i].ThotAttr != attrType.AttrTypeNum &&
MathMLAttrValueMappingTable[i].ThotAttr != 0)
i++;
if (MathMLAttrValueMappingTable[i].ThotAttr == attrType.AttrTypeNum)
do
if (!ustrcasecmp (MathMLAttrValueMappingTable[i].XMLattrValue, AttrVal))
*value = MathMLAttrValueMappingTable[i].ThotAttrValue;
else
i++;
while (*value <= 0 && MathMLAttrValueMappingTable[i].ThotAttr != 0);
}
/*----------------------------------------------------------------------
MapMathMLEntity
Search that entity in the entity table and return the corresponding value.
----------------------------------------------------------------------*/
#ifdef __STDC__
void MapMathMLEntity (STRING entityName,
STRING entityValue,
STRING alphabet)
#else
void MapMathMLEntity (entityName, entityValue, alphabet)
STRING entityName;
STRING entityValue;
STRING alphabet;
#endif
{
int i;
ThotBool found;
found = FALSE;
for (i = 0; MathEntityTable[i].charCode >= 0 && !found; i++)
found = !ustrcmp (MathEntityTable[i].charName, entityName);
if (found)
/* entity found */
{
i--;
entityValue[0] = (UCHAR_T) MathEntityTable[i].charCode;
entityValue[1] = EOS;
*alphabet = MathEntityTable[i].charAlphabet;
}
else
{
entityValue[0] = EOS;
*alphabet = EOS;
}
}
/*----------------------------------------------------------------------
MathMLEntityCreated
A MathML entity has been created by the XML parser.
Create an attribute EntityName containing the entity name.
----------------------------------------------------------------------*/
#ifdef __STDC__
void MathMLEntityCreated (USTRING entityValue, Language lang,
STRING entityName, Document doc)
#else
void MathMLEntityCreated (entityValue, lang, entityName, doc)
USTRING entityValue;
Language lang;
STRING entityName;
Document doc;
#endif
{
ElementType elType;
Element elText;
AttributeType attrType;
Attribute attr;
int len, code;
#define MAX_ENTITY_LENGTH 80
CHAR_T buffer[MAX_ENTITY_LENGTH];
if (lang < 0)
/* unknown entity */
{
/* by default display a question mark */
entityValue[0] = '?';
entityValue[1] = EOS;
lang = TtaGetLanguageIdFromAlphabet('L');
/* let's see if we can do more */
if (entityName[0] == '#')
/* it's a number */
{
if (entityName[1] == 'x')
/* it's a hexadecimal number */
usscanf (&entityName[2], TEXT("%x"), &code);
else
/* it's a decimal number */
usscanf (&entityName[1], TEXT("%d"), &code);
GetFallbackCharacter (code, entityValue, &lang);
}
}
XMLTextToDocument ();
elType.ElTypeNum = MathML_EL_TEXT_UNIT;
elType.ElSSchema = GetMathMLSSchema (doc);
elText = TtaNewElement (doc, elType);
SetElemLineNumber (elText);
XMLInsertElement (elText);
TtaSetTextContent (elText, entityValue, lang, doc);
TtaSetAccessRight (elText, ReadOnly, doc);
attrType.AttrSSchema = GetMathMLSSchema (doc);
attrType.AttrTypeNum = MathML_ATTR_EntityName;
attr = TtaNewAttribute (attrType);
TtaAttachAttribute (elText, attr, doc);
len = ustrlen (entityName);
if (len > MAX_ENTITY_LENGTH -3)
len = MAX_ENTITY_LENGTH -3;
buffer[0] = '&';
ustrncpy (&buffer[1], entityName, len);
buffer[len+1] = ';';
buffer[len+2] = EOS;
TtaSetAttributeText (attr, buffer, elText, doc);
}
/*---------------------------------------------------------------------------
MapMathMLEntityWithExpat
Search that entity in the entity table and return the corresponding value.
---------------------------------------------------------------------------*/
#ifdef __STDC__
void MapMathMLEntityWithExpat (STRING entityName,
int* entityValue,
STRING alphabet)
#else
void MapMathMLEntityWithExpat (entityName, entityValue, alphabet)
STRING entityName;
int *entityValue;
STRING alphabet;
#endif
{
int i;
ThotBool found;
found = FALSE;
for (i = 0; MathEntityTable[i].charCode >= 0 && !found; i++)
found = !ustrcmp (MathEntityTable[i].charName, entityName);
if (found)
/* entity found */
{
i--;
*entityValue = MathEntityTable[i].charCode;
*alphabet = MathEntityTable[i].charAlphabet;
}
else
*alphabet = EOS;
}
/*----------------------------------------------------------------------
MathMLEntityCreatedWithExpat
A MathML entity has been created by the XML parser.
Create an attribute EntityName containing the entity name.
----------------------------------------------------------------------*/
#ifdef __STDC__
void MathMLEntityCreatedWithExpat (int entityValue, Language lang,
STRING entityName, ParserData *XmlContext)
#else
void MathMLEntityCreatedWithExpat (entityValue, lang, entityName, XmlContext)
int entityValue;
Language lang;
STRING entityName;
ParserData *XmlContext;
#endif
{
ElementType elType;
Element elText;
AttributeType attrType;
Attribute attr;
int len, code;
#define MAX_ENTITY_LENGTH 80
CHAR_T buffer[MAX_ENTITY_LENGTH];
if (lang < 0)
/* Unknown entity */
{
/* By default display a question mark */
buffer[0] = '?';
buffer[1] = WC_EOS;
lang = TtaGetLanguageIdFromAlphabet('L');
/* Let's see if we can do more */
if (entityName[0] == '#')
/* It's a number */
{
if (entityName[1] == 'x')
/* It's a hexadecimal number */
usscanf (&entityName[2], TEXT("%x"), &code);
else
/* It's a decimal number */
usscanf (&entityName[1], TEXT("%d"), &code);
GetFallbackCharacter (code, buffer, &lang);
}
}
else
{
buffer[0] = ((UCHAR_T) entityValue);
buffer[1] = WC_EOS;
}
elType.ElTypeNum = MathML_EL_TEXT_UNIT;
elType.ElSSchema = GetMathMLSSchema (XmlContext->doc);
elText = TtaNewElement (XmlContext->doc, elType);
XmlSetElemLineNumber (elText);
InsertXmlElement (&elText);
TtaSetTextContent (elText, buffer, lang, XmlContext->doc);
XmlContext->lastElementClosed = TRUE;
XmlContext->mergeText = FALSE;
/* Make that text leaf read-only */
TtaSetAccessRight (elText, ReadOnly, XmlContext->doc);
/* Associate an attribute EntityName with the new text leaf */
attrType.AttrSSchema = GetMathMLSSchema (XmlContext->doc);
attrType.AttrTypeNum = MathML_ATTR_EntityName;
attr = TtaNewAttribute (attrType);
TtaAttachAttribute (elText, attr, XmlContext->doc);
len = ustrlen (entityName);
if (len > MAX_ENTITY_LENGTH -3)
len = MAX_ENTITY_LENGTH -3;
buffer[0] = '&';
ustrncpy (&buffer[1], entityName, len);
buffer[len+1] = ';';
buffer[len+2] = WC_EOS;
TtaSetAttributeText (attr, buffer, elText, XmlContext->doc);
}
/*----------------------------------------------------------------------
ElementNeedsPlaceholder
returns TRUE if element el needs a sibling placeholder.
----------------------------------------------------------------------*/
#ifdef __STDC__
ThotBool ElementNeedsPlaceholder (Element el)
#else
ThotBool ElementNeedsPlaceholder (el)
Element el;
#endif
{
ElementType elType;
Element child, parent;
ThotBool ret;
ret = FALSE;
elType = TtaGetElementType (el);
if (elType.ElTypeNum == MathML_EL_MS ||
elType.ElTypeNum == MathML_EL_MSPACE ||
elType.ElTypeNum == MathML_EL_MROW ||
elType.ElTypeNum == MathML_EL_MFRAC ||
elType.ElTypeNum == MathML_EL_BevelledMFRAC ||
elType.ElTypeNum == MathML_EL_MSQRT ||
elType.ElTypeNum == MathML_EL_MROOT ||
elType.ElTypeNum == MathML_EL_MSTYLE ||
elType.ElTypeNum == MathML_EL_MERROR ||
elType.ElTypeNum == MathML_EL_MPADDED ||
elType.ElTypeNum == MathML_EL_MPHANTOM ||
elType.ElTypeNum == MathML_EL_MFENCED ||
elType.ElTypeNum == MathML_EL_MF ||
elType.ElTypeNum == MathML_EL_MSUB ||
elType.ElTypeNum == MathML_EL_MSUP ||
elType.ElTypeNum == MathML_EL_MSUBSUP ||
elType.ElTypeNum == MathML_EL_MUNDER ||
elType.ElTypeNum == MathML_EL_MOVER ||
elType.ElTypeNum == MathML_EL_MUNDEROVER ||
elType.ElTypeNum == MathML_EL_MMULTISCRIPTS ||
elType.ElTypeNum == MathML_EL_MTABLE ||
elType.ElTypeNum == MathML_EL_MACTION)
ret = TRUE;
else
if (elType.ElTypeNum == MathML_EL_MO)
/* an operator that contains a single Symbol needs a placeholder,
except when it is in a Base or UnderOverBase */
{
child = TtaGetFirstChild (el);
if (child != NULL)
{
elType = TtaGetElementType (child);
if (elType.ElTypeNum == MathML_EL_SYMBOL_UNIT)
{
ret = TRUE;
parent = TtaGetParent (el);
if (parent != NULL)
{
elType = TtaGetElementType (parent);
if (elType.ElTypeNum == MathML_EL_Base ||
elType.ElTypeNum == MathML_EL_UnderOverBase)
ret = FALSE;
}
}
}
}
return ret;
}
/*----------------------------------------------------------------------
CreatePlaceholders
----------------------------------------------------------------------*/
#ifdef __STDC__
static void CreatePlaceholders (Element el, Document doc)
#else
static void CreatePlaceholders (el, doc)
Element el;
Document doc;
#endif
{
Element sibling, prev, constr, child;
Attribute attr;
ElementType elType;
AttributeType attrType;
ThotBool create;
if (!el)
return;
elType.ElSSchema = GetMathMLSSchema (doc);
prev = NULL;
create = TRUE;
sibling = el;
while (sibling != NULL)
{
if (!ElementNeedsPlaceholder (sibling))
create = FALSE;
else
{
if (sibling == el)
/* first element */
{
elType = TtaGetElementType (sibling);
if (elType.ElTypeNum == MathML_EL_MF)
/* the first element is a MF. Don't create a placeholder
before */
create = FALSE;
else if (elType.ElTypeNum == MathML_EL_MROW)
/* the first element is a MROW */
{
child = TtaGetFirstChild (sibling);
if (child != NULL)
{
elType = TtaGetElementType (child);
if (elType.ElTypeNum != MathML_EL_MF)
/* the first child of the MROW element is not a MF */
/* Don't create a placeholder before */
create = FALSE;
}
}
}
if (create)
{
elType.ElTypeNum = MathML_EL_Construct;
constr = TtaNewElement (doc, elType);
TtaInsertSibling (constr, sibling, TRUE, doc);
attrType.AttrSSchema = elType.ElSSchema;
attrType.AttrTypeNum = MathML_ATTR_IntPlaceholder;
attr = TtaNewAttribute (attrType);
TtaAttachAttribute (constr, attr, doc);
TtaSetAttributeValue (attr, MathML_ATTR_IntPlaceholder_VAL_yes_,
constr, doc);
}
create = TRUE;
}
prev = sibling;
TtaNextSibling (&sibling);
}
if (prev != NULL && create)
{
elType = TtaGetElementType (prev);
/* don't insert a placeholder after the last element if it's a MF
or a SEP */
if (elType.ElTypeNum == MathML_EL_MF ||
elType.ElTypeNum == MathML_EL_SEP)
create = FALSE;
else if (elType.ElTypeNum == MathML_EL_MROW)
/* the last element is a MROW */
{
child = TtaGetLastChild (prev);
if (child != NULL)
{
elType = TtaGetElementType (child);
if (elType.ElTypeNum != MathML_EL_MF)
/* the last child of the MROW element is not a MF */
/* Don't create a placeholder before */
create = FALSE;
}
}
if (create)
{
elType.ElTypeNum = MathML_EL_Construct;
constr = TtaNewElement (doc, elType);
TtaInsertSibling (constr, prev, FALSE, doc);
attrType.AttrSSchema = elType.ElSSchema;
attrType.AttrTypeNum = MathML_ATTR_IntPlaceholder;
attr = TtaNewAttribute (attrType);
TtaAttachAttribute (constr, attr, doc);
TtaSetAttributeValue (attr, MathML_ATTR_IntPlaceholder_VAL_yes_,
constr, doc);
}
}
}
/*----------------------------------------------------------------------
NextNotSepOrComment
Return the next sibling of element el that is not a SEP element
nor an XMLcomment element.
Return el itself if it's not a SEP or a comment.
----------------------------------------------------------------------*/
#ifdef __STDC__
static void NextNotSepOrComment (Element* el, Element* prev)
#else
static void NextNotSepOrComment (el, prev)
Element *el;
#endif
{
ElementType elType;
if (*el == NULL)
return;
elType = TtaGetElementType (*el);
while (*el != NULL && (elType.ElTypeNum == MathML_EL_SEP ||
elType.ElTypeNum == MathML_EL_XMLcomment))
{
*prev = *el;
TtaNextSibling (el);
if (*el != NULL)
elType = TtaGetElementType (*el);
}
}
/*----------------------------------------------------------------------
CheckMathSubExpressions
Children of element el should be of type type1, type2, and type3.
If they are not, wrap them in elements of these types.
If element el have too many or not enough children, return FALSE.
----------------------------------------------------------------------*/
#ifdef __STDC__
static ThotBool CheckMathSubExpressions (Element el, int type1, int type2, int type3, Document doc)
#else
static ThotBool CheckMathSubExpressions (el, type1, type2, type3, doc)
Element el;
int type1;
int type2;
int type3;
Document doc;
#endif
{
Element child, new, prev;
ElementType elType, childType;
ThotBool result;
result = TRUE;
elType.ElSSchema = GetMathMLSSchema (doc);
child = TtaGetFirstChild (el);
prev = NULL;
NextNotSepOrComment (&child, &prev);
if (type1 == 0)
{
if (child)
/* no child expected and there is one, error */
result = FALSE;
}
else
if (!child)
/* a first child is expected and it's missing */
result = FALSE;
else
{
elType.ElTypeNum = type1;
childType = TtaGetElementType (child);
if (TtaSameTypes (childType, elType) == 0)
{
TtaRemoveTree (child, doc);
new = TtaNewElement (doc, elType);
if (prev == NULL)
TtaInsertFirstChild (&new, el, doc);
else
TtaInsertSibling (new, prev, FALSE, doc);
TtaInsertFirstChild (&child, new, doc);
CreatePlaceholders (child, doc);
child = new;
}
prev = child;
TtaNextSibling (&child);
NextNotSepOrComment (&child, &prev);
if (type2 == 0)
{
if (child)
/* this second child is not expected, error */
result = FALSE;
}
else
{
if (!child)
/* a second child is expected and it's missing */
result = FALSE;
else
{
elType.ElTypeNum = type2;
childType = TtaGetElementType (child);
if (TtaSameTypes (childType, elType) == 0)
{
TtaRemoveTree (child, doc);
new = TtaNewElement (doc, elType);
TtaInsertSibling (new, prev, FALSE, doc);
TtaInsertFirstChild (&child, new, doc);
CreatePlaceholders (child, doc);
child = new;
}
prev = child;
TtaNextSibling (&child);
NextNotSepOrComment (&child, &prev);
if (type3 == 0)
{
if (child)
/* this third child is not expected, error */
result = FALSE;
}
else
{
if (!child)
/* a third child is expected and it's missing */
result = FALSE;
else
{
elType.ElTypeNum = type3;
childType = TtaGetElementType (child);
if (TtaSameTypes (childType, elType) == 0)
{
TtaRemoveTree (child, doc);
new = TtaNewElement (doc, elType);
TtaInsertSibling (new, prev, FALSE, doc);
TtaInsertFirstChild (&child, new, doc);
CreatePlaceholders (child, doc);
child = new;
}
}
prev = child;
TtaNextSibling (&child);
NextNotSepOrComment (&child, &prev);
if (child)
/* this fourth child is unexpected */
result = FALSE;
}
}
}
}
return result;
}
/*----------------------------------------------------------------------
SetSingleIntHorizStretchAttr
Put a IntHorizStretch attribute on element el if it contains only
a MO element that is a stretchable symbol.
-----------------------------------------------------------------------*/
#ifdef __STDC__
void SetSingleIntHorizStretchAttr (Element el, Document doc, Element* selEl)
#else /* __STDC__*/
void SetSingleIntHorizStretchAttr (el, doc, selEl)
Element el;
Document doc;
Element* selEl;
#endif /* __STDC__*/
{
Element child, sibling, textEl, symbolEl;
ElementType elType;
Attribute attr;
AttributeType attrType;
int len;
Language lang;
CHAR_T alphabet;
UCHAR_T text[2];
unsigned char c;
if (el == NULL)
return;
child = TtaGetFirstChild (el);
if (child)
{
elType = TtaGetElementType (child);
if (elType.ElTypeNum == MathML_EL_MO)
/* the first child is a MO */
{
sibling = child;
TtaNextSibling (&sibling);
if (sibling == NULL)
/* there is no other child */
{
textEl = TtaGetFirstChild (child);
elType = TtaGetElementType (textEl);
if (elType.ElTypeNum == MathML_EL_TEXT_UNIT)
/* the MO child contains a TEXT element */
{
len = TtaGetTextLength (textEl);
if (len == 1)
/* the TEXT element contains a single character */
{
/* get that character */
len = 2;
TtaGiveTextContent (textEl, text, &len, &lang);
alphabet = TtaGetAlphabet (lang);
if (alphabet == 'G')
/* a single Symbol character */
if ((int)text[0] == 172 || (int)text[0] == 174 ||
(int)text[0] == 45)
/* horizontal arrow or horizontal bar */
{
c = EOS;
/* attach a IntHorizStretch attribute */
attrType.AttrSSchema = elType.ElSSchema;
attrType.AttrTypeNum = MathML_ATTR_IntHorizStretch;
attr = TtaNewAttribute (attrType);
TtaAttachAttribute (el, attr, doc);
TtaSetAttributeValue (attr, MathML_ATTR_IntHorizStretch_VAL_yes_, el, doc);
/* replace the TEXT element by a Thot SYMBOL element */
elType.ElTypeNum = MathML_EL_SYMBOL_UNIT;
symbolEl = TtaNewElement (doc, elType);
TtaInsertSibling (symbolEl, textEl, FALSE, doc);
if (selEl != NULL)
if (*selEl == textEl)
*selEl = symbolEl;
TtaDeleteTree (textEl, doc);
if ((int)text[0] == 172)
c = '<'; /* arrow left */
if ((int)text[0] == 174)
c = '>'; /* arrow right */
if ((int)text[0] == 45) /* - (minus) */
/* a horizontal line in the middle of the box */
c = 'h';
if (c != EOS)
TtaSetGraphicsShape (symbolEl, c, doc);
}
}
}
}
}
}
}
/*----------------------------------------------------------------------
SetIntHorizStretchAttr
Put a IntHorizStretch attribute on all children of element el which
contain only a MO element that is a stretchable symbol.
-----------------------------------------------------------------------*/
#ifdef __STDC__
static void SetIntHorizStretchAttr (Element el, Document doc)
#else /* __STDC__*/
static void SetIntHorizStretchAttr (el, doc)
Element el;
Document doc;
#endif /* __STDC__*/
{
Element child;
if (el == NULL)
return;
child = TtaGetFirstChild (el);
while (child != NULL)
{
SetSingleIntHorizStretchAttr (child, doc, NULL);
TtaNextSibling (&child);
}
}
/*----------------------------------------------------------------------
SetIntVertStretchAttr
Put a IntVertStretch attribute on element el if its base element
(Base for a MSUBSUP, MSUP or MSUB; UnderOverBase for a MUNDEROVER,
a MUNDER of a MOVER) contains only a MO element that is a vertically
stretchable symbol.
-----------------------------------------------------------------------*/
#ifdef __STDC__
void SetIntVertStretchAttr (Element el, Document doc, int base, Element* selEl)
#else /* __STDC__*/
void SetIntVertStretchAttr (el, doc, base, selEl)
Element el;
Document doc;
int base;
Element* selEl;
#endif /* __STDC__*/
{
Element child, sibling, textEl, symbolEl, parent, operator;
ElementType elType;
Attribute attr;
AttributeType attrType;
int len;
Language lang;
CHAR_T alphabet;
UCHAR_T text[2];
unsigned char c;
if (el == NULL)
return;
operator = NULL;
if (base == 0)
/* it's a MO */
{
parent = TtaGetParent (el);
if (parent != NULL)
{
elType = TtaGetElementType (parent);
if (elType.ElTypeNum != MathML_EL_Base &&
elType.ElTypeNum != MathML_EL_UnderOverBase &&
elType.ElTypeNum != MathML_EL_MSUBSUP &&
elType.ElTypeNum != MathML_EL_MSUB &&
elType.ElTypeNum != MathML_EL_MSUP &&
elType.ElTypeNum != MathML_EL_MUNDEROVER &&
elType.ElTypeNum != MathML_EL_MUNDER &&
elType.ElTypeNum != MathML_EL_MUNDEROVER)
operator = el;
}
}
else
/* it's not a MO */
{
/* search the Base or UnderOverBase child */
child = TtaGetFirstChild (el);
if (child != NULL)
{
elType = TtaGetElementType (child);
if (elType.ElTypeNum == base)
/* the first child is a Base or UnderOverBase */
{
child = TtaGetFirstChild (child);
if (child != NULL)
{
elType = TtaGetElementType (child);
if (elType.ElTypeNum == MathML_EL_MO)
/* its first child is a MO */
{
sibling = child;
TtaNextSibling (&sibling);
if (sibling == NULL)
/* there is no other child */
operator = child;
}
}
}
}
}
if (operator != NULL)
{
textEl = TtaGetFirstChild (operator);
if (textEl != NULL)
{
elType = TtaGetElementType (textEl);
if (elType.ElTypeNum == MathML_EL_TEXT_UNIT)
{
len = TtaGetTextLength (textEl);
if (len == 1)
{
len = 2;
TtaGiveTextContent (textEl, text, &len, &lang);
alphabet = TtaGetAlphabet (lang);
if (alphabet == 'G')
/* a single Symbol character */
if ((int)text[0] == 242)
/* Integral */
{
/* attach a IntVertStretch attribute */
attrType.AttrSSchema = elType.ElSSchema;
attrType.AttrTypeNum = MathML_ATTR_IntVertStretch;
attr = TtaNewAttribute (attrType);
TtaAttachAttribute (el, attr, doc);
TtaSetAttributeValue (attr,
MathML_ATTR_IntVertStretch_VAL_yes_,
el, doc);
/* replace the TEXT element by a Thot SYMBOL element*/
elType.ElTypeNum = MathML_EL_SYMBOL_UNIT;
symbolEl = TtaNewElement (doc, elType);
TtaInsertSibling (symbolEl, textEl, FALSE, doc);
if (selEl != NULL)
if (*selEl == textEl)
*selEl = symbolEl;
TtaDeleteTree (textEl, doc);
c = 'i';
TtaSetGraphicsShape (symbolEl, c, doc);
}
}
}
}
}
}
/*----------------------------------------------------------------------
SetIntPlaceholderAttr
Put a IntPlaceholder attribute on all Construct elements in the
subtree of root el.
-----------------------------------------------------------------------*/
#ifdef __STDC__
static void SetIntPlaceholderAttr (Element el, Document doc)
#else /* __STDC__*/
static void SetIntPlaceholderAttr (el, doc)
Element el;
Document doc;
#endif /* __STDC__*/
{
Element child;
ElementType elType;
Attribute attr;
AttributeType attrType;
if (el == NULL)
return;
elType = TtaGetElementType (el);
if (elType.ElTypeNum == MathML_EL_Construct &&
elType.ElSSchema == GetMathMLSSchema (doc))
{
attrType.AttrSSchema = elType.ElSSchema;
attrType.AttrTypeNum = MathML_ATTR_IntPlaceholder;
attr = TtaNewAttribute (attrType);
TtaAttachAttribute (el, attr, doc);
TtaSetAttributeValue (attr, MathML_ATTR_IntPlaceholder_VAL_yes_, el, doc);
}
else
{
child = TtaGetFirstChild (el);
while (child != NULL)
{
SetIntPlaceholderAttr (child, doc);
TtaNextSibling (&child);
}
}
}
/*----------------------------------------------------------------------
BuildMultiscript
The content of a MMULTISCRIPT element has been created following
the original MathML structure. Create all Thot elements defined
in the MathML S schema.
-----------------------------------------------------------------------*/
#ifdef __STDC__
static void BuildMultiscript (Element elMMULTISCRIPT, Document doc)
#else /* __STDC__*/
static void BuildMultiscript (elMMULTISCRIPT, doc)
Element elMMULTISCRIPT;
Document doc;
#endif /* __STDC__*/
{
Element elem, base, next, group, pair, script, prevPair, prevScript;
ElementType elType, elTypeGroup, elTypePair, elTypeScript;
SSchema MathMLSSchema;
base = NULL;
group = NULL;
prevPair = NULL;
prevScript = NULL;
MathMLSSchema = GetMathMLSSchema (doc);
elTypeGroup.ElSSchema = MathMLSSchema;
elTypePair.ElSSchema = MathMLSSchema;
elTypeScript.ElSSchema = MathMLSSchema;
/* process all children of the MMULTISCRIPT element */
elem = TtaGetFirstChild (elMMULTISCRIPT);
while (elem != NULL)
{
/* remember the element to be processed after the current one */
next = elem;
TtaNextSibling (&next);
/* remove the current element from the tree */
TtaRemoveTree (elem, doc);
if (base == NULL)
/* the current element is the first child of the MMULTISCRIPT
element */
{
/* Create a MultiscriptBase element as the first child of
MMULTISCRIPT and move the current element as the first child
of the MultiscriptBase element */
elTypeGroup.ElTypeNum = MathML_EL_MultiscriptBase;
base = TtaNewElement (doc, elTypeGroup);
TtaInsertFirstChild (&base, elMMULTISCRIPT, doc);
TtaInsertFirstChild (&elem, base, doc);
}
else
/* the current element is a subscript or a superscript */
{
if (group == NULL)
/* there is no PostscriptPairs element. Create one */
{
elTypeGroup.ElTypeNum = MathML_EL_PostscriptPairs;
group = TtaNewElement (doc, elTypeGroup);
TtaInsertSibling (group, base, FALSE, doc);
elTypePair.ElTypeNum = MathML_EL_PostscriptPair;
/* create a first and a last PostscriptPair as placeholders */
pair = TtaNewTree (doc, elTypePair, "");
TtaInsertFirstChild (&pair, group, doc);
SetIntPlaceholderAttr (pair, doc);
prevPair = pair;
pair = TtaNewTree (doc, elTypePair, "");
TtaInsertSibling (pair, prevPair, FALSE, doc);
SetIntPlaceholderAttr (pair, doc);
prevScript = NULL;
}
if (prevScript == NULL)
/* the current element is the first subscript or superscript
in a pair */
{
/* create a PostscriptPair or PrescriptPair element */
pair = TtaNewElement (doc, elTypePair);
if (prevPair == NULL)
TtaInsertFirstChild (&pair, group, doc);
else
TtaInsertSibling (pair, prevPair, FALSE, doc);
prevPair = pair;
/* create a MSubscript element */
elTypeScript.ElTypeNum = MathML_EL_MSubscript;
script = TtaNewElement (doc, elTypeScript);
TtaInsertFirstChild (&script, pair, doc);
prevScript = script;
}
else
/* the current element is a superscript in a pair */
{
/* create a MSuperscript element */
elTypeScript.ElTypeNum = MathML_EL_MSuperscript;
script = TtaNewElement (doc, elTypeScript);
/* insert it as a sibling of the previous MSubscript element */
TtaInsertSibling (script, prevScript, FALSE, doc);
prevScript = NULL;
}
/* insert the current element as a child of the new MSuperscript or
MSubscript element */
TtaInsertFirstChild (&elem, script, doc);
SetIntPlaceholderAttr (elem, doc);
}
CreatePlaceholders (elem, doc);
/* get next child of the MMULTISCRIPT element */
elem = next;
if (elem != NULL)
{
elType = TtaGetElementType (elem);
if (elType.ElSSchema == MathMLSSchema &&
elType.ElTypeNum == MathML_EL_PrescriptPairs)
/* the next element is a PrescriptPairs */
{
/* if there there is no PostscriptPairs element, create one as a
placeholder */
if (elTypeGroup.ElTypeNum != MathML_EL_PostscriptPairs)
{
elTypeGroup.ElTypeNum = MathML_EL_PostscriptPairs;
group = TtaNewTree (doc, elTypeGroup, "");
TtaInsertSibling (group, elem, TRUE, doc);
SetIntPlaceholderAttr (group, doc);
}
/* the following elements will be interpreted as sub- superscripts
in PrescriptPair elements, wich will be children of this
PrescriptPairs element */
elTypeGroup.ElTypeNum = MathML_EL_PrescriptPairs;
elTypePair.ElTypeNum = MathML_EL_PrescriptPair;
group = elem;
/* create a first and a last PostscriptPair as placeholders */
pair = TtaNewTree (doc, elTypePair, "");
TtaInsertFirstChild (&pair, group, doc);
SetIntPlaceholderAttr (pair, doc);
prevPair = pair;
pair = TtaNewTree (doc, elTypePair, "");
TtaInsertSibling (pair, prevPair, FALSE, doc);
SetIntPlaceholderAttr (pair, doc);
prevScript = NULL;
TtaNextSibling (&elem);
}
}
}
/* all children of element MMULTISCRIPTS have been processed */
/* if the last group processed is not a PrescriptPairs element,
create one as a placeholder */
if (elTypeGroup.ElTypeNum != MathML_EL_PrescriptPairs && base != NULL)
{
elTypeGroup.ElTypeNum = MathML_EL_PrescriptPairs;
elem = TtaNewTree (doc, elTypeGroup, "");
if (group == NULL)
group = base;
TtaInsertSibling (elem, group, TRUE, doc);
SetIntPlaceholderAttr (elem, doc);
}
}
/*----------------------------------------------------------------------
CreateWrapper
Create an element of type wrapperType as a child of element el and
move all chidren of element el within the new element.
-----------------------------------------------------------------------*/
#ifdef __STDC__
static void CreateWrapper (Element el, int wrapperType, Document doc)
#else /* __STDC__*/
static void CreateWrapper (el, wrapperType, doc)
Element el;
int wrapperType;
Document doc;
#endif /* __STDC__*/
{
Element wrapper, child, prevChild, nextChild;
ElementType elType;
child = TtaGetFirstChild (el);
elType.ElSSchema = GetMathMLSSchema (doc);
elType.ElTypeNum = wrapperType;
wrapper = TtaNewElement (doc, elType);
TtaInsertFirstChild (&wrapper, el, doc);
prevChild = NULL;
while (child)
{
nextChild = child;
TtaNextSibling (&nextChild);
TtaRemoveTree (child, doc);
if (prevChild == NULL)
TtaInsertFirstChild (&child, wrapper, doc);
else
TtaInsertSibling (child, prevChild, FALSE, doc);
prevChild = child;
child = nextChild;
}
}
/*----------------------------------------------------------------------
CheckMTable
The content of a MTABLE element has been created following
the original MathML structure. Create all Thot elements defined
in the MathML S schema.
If placeholder, associate an attribute IntPlaceholder with all
cells generated in a MathML table.
-----------------------------------------------------------------------*/
#ifdef __STDC__
void CheckMTable (Element elMTABLE, Document doc, ThotBool placeholder)
#else /* __STDC__*/
void CheckMTable (elMTABLE, doc, placeholder)
Element elMTABLE;
Document doc;
ThotBool placeholder;
#endif /* __STDC__*/
{
ElementType elType;
Element MTableHead, MTableBody, row, nextRow, el, prevRow, cell,
nextCell, newMTD, firstColHead;
SSchema MathMLSSchema;
MathMLSSchema = GetMathMLSSchema (doc);
row = TtaGetFirstChild (elMTABLE);
/* create a MTable_head as the first child of element MTABLE */
elType.ElSSchema = MathMLSSchema;
elType.ElTypeNum = MathML_EL_MTable_head;
MTableHead = TtaNewElement (doc, elType);
TtaInsertFirstChild (&MTableHead, elMTABLE, doc);
elType.ElTypeNum = MathML_EL_MColumn_head;
firstColHead = TtaNewTree (doc, elType, "");
TtaInsertFirstChild (&firstColHead, MTableHead, doc);
/* create a MTable_body */
elType.ElSSchema = MathMLSSchema;
elType.ElTypeNum = MathML_EL_MTable_body;
MTableBody = TtaNewElement (doc, elType);
TtaInsertSibling (MTableBody, MTableHead, FALSE, doc);
/* move all children of element MTABLE into the new MTable_body element
and wrap each non-MTR element with a MTR */
prevRow = NULL;
while (row)
{
nextRow = row;
TtaNextSibling (&nextRow);
elType = TtaGetElementType (row);
TtaRemoveTree (row, doc);
if (TtaSameSSchemas (elType.ElSSchema, MathMLSSchema) &&
(elType.ElTypeNum == MathML_EL_XMLcomment ||
elType.ElTypeNum == MathML_EL_MTR))
{
if (prevRow == NULL)
TtaInsertFirstChild (&row, MTableBody, doc);
else
TtaInsertSibling (row, prevRow, FALSE, doc);
prevRow = row;
if (elType.ElTypeNum == MathML_EL_MTR)
cell = TtaGetFirstChild (row);
else
cell = NULL;
}
else
/* this child is not a MTR nor a comment, create a MTR element */
{
elType.ElSSchema = MathMLSSchema;
elType.ElTypeNum = MathML_EL_MTR;
el = TtaNewElement (doc, elType);
if (prevRow == NULL)
TtaInsertFirstChild (&el, MTableBody, doc);
else
TtaInsertSibling (el, prevRow, FALSE, doc);
TtaInsertFirstChild (&row, el, doc);
cell = row;
prevRow = el;
}
while (cell)
/* check all children of the current MTR element */
{
nextCell = cell;
TtaNextSibling (&nextCell);
elType = TtaGetElementType (cell);
if (!TtaSameSSchemas (elType.ElSSchema, MathMLSSchema) ||
(elType.ElTypeNum != MathML_EL_XMLcomment &&
elType.ElTypeNum != MathML_EL_MTD))
/* this is not a MTD nor a comment, create a wrapping MTD */
{
elType.ElSSchema = MathMLSSchema;
elType.ElTypeNum = MathML_EL_MTD;
newMTD = TtaNewElement (doc, elType);
TtaInsertSibling (newMTD, cell, TRUE, doc);
TtaRemoveTree (cell, doc);
TtaInsertFirstChild (&cell, newMTD, doc);
cell = newMTD;
}
if (elType.ElTypeNum == MathML_EL_MTD)
/* This is a MTD element. Wrap its contents with a CellWrapper */
CreateWrapper (cell, MathML_EL_CellWrapper, doc);
cell = nextCell;
}
row = nextRow;
}
CheckAllRows (elMTABLE, doc, placeholder);
}
/*----------------------------------------------------------------------
SetFontstyleAttr
The content of a MI element has been created or modified.
Create or change attribute IntFontstyle for that element accordingly.
-----------------------------------------------------------------------*/
#ifdef __STDC__
void SetFontstyleAttr (Element el, Document doc)
#else /* __STDC__*/
void SetFontstyleAttr (el, doc)
Element el;
Document doc;
#endif /* __STDC__*/
{
ElementType elType;
AttributeType attrType;
Attribute attr, IntAttr;
Element textEl;
int len;
STRING value;
ThotBool italic;
if (el != NULL)
{
/* search the fontstyle attribute */
elType = TtaGetElementType (el);
attrType.AttrSSchema = elType.ElSSchema;
attrType.AttrTypeNum = MathML_ATTR_fontstyle;
attr = TtaGetAttribute (el, attrType);
attrType.AttrTypeNum = MathML_ATTR_IntFontstyle;
IntAttr = TtaGetAttribute (el, attrType);
if (attr != NULL)
/* there is a fontstyle attribute. Remove the corresponding
internal attribute that is not needed */
{
if (IntAttr != NULL)
TtaRemoveAttribute (el, IntAttr, doc);
}
else
/* there is no fontstyle attribute. Create an internal attribute
IntFontstyle with a value that depends on the content of the MI */
{
/* get content length */
len = TtaGetElementVolume (el);
if (len > 1)
/* put an attribute IntFontstyle = IntNormal */
{
if (IntAttr == NULL)
{
IntAttr = TtaNewAttribute (attrType);
TtaAttachAttribute (el, IntAttr, doc);
}
TtaSetAttributeValue (IntAttr, MathML_ATTR_IntFontstyle_VAL_IntNormal,
el, doc);
}
else
/* MI contains a single character. Remove attribute IntFontstyle
if it exists, except if it's ImaginaryI, ExponentialE or
DifferentialD. */
{
italic = TRUE;
textEl = TtaGetFirstChild (el);
if (textEl != NULL)
{
/* is there an attribute EntityName on that character? */
attrType.AttrTypeNum = MathML_ATTR_EntityName;
attr = TtaGetAttribute (textEl, attrType);
if (attr)
{
len = TtaGetTextAttributeLength (attr);
if (len > 0)
{
value = TtaAllocString (len+1);
TtaGiveTextAttributeValue (attr, value, &len);
if (ustrcmp (value, TEXT("ⅈ")) == 0 ||
ustrcmp (value, TEXT("ⅇ")) == 0 ||
ustrcmp (value, TEXT("ⅆ")) == 0)
italic = FALSE;
TtaFreeMemory (value);
}
}
if (italic)
{
if (IntAttr != NULL)
TtaRemoveAttribute (el, IntAttr, doc);
}
else
{
/* put an attribute IntFontstyle = IntNormal */
if (IntAttr == NULL)
{
attrType.AttrTypeNum = MathML_ATTR_IntFontstyle;
IntAttr = TtaNewAttribute (attrType);
TtaAttachAttribute (el, IntAttr, doc);
}
TtaSetAttributeValue (IntAttr, MathML_ATTR_IntFontstyle_VAL_IntNormal,
el, doc);
}
}
}
}
}
}
/*----------------------------------------------------------------------
SetIntAddSpaceAttr
The content of a MO element has been created or modified.
Create or change attribute IntAddSpace for that element accordingly.
-----------------------------------------------------------------------*/
#ifdef __STDC__
void SetIntAddSpaceAttr (Element el, Document doc)
#else /* __STDC__*/
void SetIntAddSpaceAttr (el, doc)
Element el;
Document doc;
#endif /* __STDC__*/
{
Element textEl, previous;
ElementType elType;
AttributeType attrType;
Attribute attr, formAttr;
int len, val, form;
#define BUFLEN 10
UCHAR_T text[BUFLEN];
Language lang;
CHAR_T alphabet;
/* get the content of the mo element */
textEl = TtaGetFirstChild (el);
if (textEl != NULL)
/* the mo element is not empty */
{
/* does the mo element have an IntAddSpace attribute? */
elType = TtaGetElementType (el);
attrType.AttrSSchema = elType.ElSSchema;
attrType.AttrTypeNum = MathML_ATTR_IntAddSpace;
attr = TtaGetAttribute (el, attrType);
if (attr == NULL)
/* no IntAddSpace Attr, create one */
{
attr = TtaNewAttribute (attrType);
TtaAttachAttribute (el, attr, doc);
}
/* nospace by default */
val = MathML_ATTR_IntAddSpace_VAL_nospace;
/* does the mo element have a form attribute? */
attrType.AttrTypeNum = MathML_ATTR_form;
formAttr = TtaGetAttribute (el, attrType);
if (formAttr)
/* there is a form attribute */
{
form = TtaGetAttributeValue (formAttr);
switch (form)
{
case MathML_ATTR_form_VAL_prefix:
val = MathML_ATTR_IntAddSpace_VAL_nospace;
break;
case MathML_ATTR_form_VAL_infix:
val = MathML_ATTR_IntAddSpace_VAL_both;
break;
case MathML_ATTR_form_VAL_postfix:
val = MathML_ATTR_IntAddSpace_VAL_spaceafter;
break;
}
}
else
/* no form attribute. Analyze the content */
{
len = TtaGetTextLength (textEl);
if (len > 0 && len < BUFLEN)
{
len = BUFLEN;
TtaGiveTextContent (textEl, text, &len, &lang);
alphabet = TtaGetAlphabet (lang);
if (len == 1)
/* the mo element contains a single character */
if (alphabet == 'L')
/* ISO-Latin 1 character */
{
if (text[0] == '-')
/* prefix or infix operator? */
{
previous = el;
TtaPreviousSibling (&previous);
if (previous == NULL)
/* no previous sibling => prefix operator */
val = MathML_ATTR_IntAddSpace_VAL_nospace;
else
{
elType = TtaGetElementType (previous);
if (elType.ElTypeNum == MathML_EL_MO)
/* after an operator => prefix operator */
val = MathML_ATTR_IntAddSpace_VAL_nospace;
else
/* infix operator */
val = MathML_ATTR_IntAddSpace_VAL_both;
}
}
else if (text[0] == '+' ||
text[0] == '&' ||
text[0] == '*' ||
text[0] == '<' ||
text[0] == '=' ||
text[0] == '>' ||
text[0] == '^')
/* infix operator */
val = MathML_ATTR_IntAddSpace_VAL_both;
else if (text[0] == ',' ||
text[0] == ';')
/* separator */
val = MathML_ATTR_IntAddSpace_VAL_spaceafter;
}
else if (alphabet == 'G')
/* Symbol character set */
if ((int)text[0] == 163 || /* less or equal */
(int)text[0] == 177 || /* plus or minus */
(int)text[0] == 179 || /* greater or equal */
(int)text[0] == 180 || /* times */
(int)text[0] == 184 || /* divide */
(int)text[0] == 185 || /* not equal */
(int)text[0] == 186 || /* identical */
(int)text[0] == 187 || /* equivalent */
(int)text[0] == 196 || /* circle times */
(int)text[0] == 197 || /* circle plus */
((int)text[0] >= 199 && (int)text[0] <= 209) || /* */
(int)text[0] == 217 || /* and */
(int)text[0] == 218 ) /* or */
/* infix operator */
val = MathML_ATTR_IntAddSpace_VAL_both;
}
}
TtaSetAttributeValue (attr, val, el, doc);
}
}
/*----------------------------------------------------------------------
ChangeTypeOfElement
Change the type of element elem into newTypeNum
-----------------------------------------------------------------------*/
#ifdef __STDC__
void ChangeTypeOfElement (Element elem, Document doc, int newTypeNum)
#else /* __STDC__*/
void ChangeTypeOfElement (elem, doc, newTypeNum)
Element elem;
Document doc;
int newTypeNum;
#endif /* __STDC__*/
{
Element prev, next, parent;
parent = NULL;
prev = elem;
TtaPreviousSibling (&prev);
if (prev == NULL)
{
next = elem;
TtaNextSibling (&next);
if (next == NULL)
parent = TtaGetParent (elem);
}
TtaRemoveTree (elem, doc);
ChangeElementType (elem, newTypeNum);
if (prev != NULL)
TtaInsertSibling (elem, prev, FALSE, doc);
else if (next != NULL)
TtaInsertSibling (elem, next, TRUE, doc);
else
TtaInsertFirstChild (&elem, parent, doc);
}
/*----------------------------------------------------------------------
ChildOfMRowOrInferred
Return TRUE if element el is a child of a MROW element or an
inferred MROW element
----------------------------------------------------------------------*/
#ifdef __STDC__
ThotBool ChildOfMRowOrInferred (Element el)
#else
ThotBool ChildOfMRowOrInferred (el)
Element el;
#endif
{
ElementType elType;
Element parent;
ThotBool result;
result = FALSE;
parent = TtaGetParent (el);
if (parent)
{
elType = TtaGetElementType (parent);
result = (elType.ElTypeNum == MathML_EL_MROW ||
elType.ElTypeNum == MathML_EL_SqrtBase ||
elType.ElTypeNum == MathML_EL_MSTYLE ||
elType.ElTypeNum == MathML_EL_MERROR ||
elType.ElTypeNum == MathML_EL_MPADDED ||
elType.ElTypeNum == MathML_EL_MPHANTOM ||
elType.ElTypeNum == MathML_EL_MENCLOSE ||
elType.ElTypeNum == MathML_EL_CellWrapper ||
elType.ElTypeNum == MathML_EL_FencedExpression);
}
return result;
}
/*----------------------------------------------------------------------
CheckFence
If el is a MO element,
- if it's a large operator (∑ for instance), put a presentation
rule to enlarge the character.
- if it's a child of a MROW (or equivalent) element and if it contains
a single fence character, transform the MO into a MF and the fence
character into a Thot stretchable symbol.
----------------------------------------------------------------------*/
#ifdef __STDC__
void CheckFence (Element el, Document doc)
#else
void CheckFence (el, doc)
Element el;
Document doc;
#endif
{
ElementType elType;
Element content;
AttributeType attrType;
Attribute attr, attrStretchy;
int len, val;
Language lang;
CHAR_T alphabet;
UCHAR_T text[2];
unsigned char c;
PresentationValue pval;
PresentationContext ctxt;
elType = TtaGetElementType (el);
if (elType.ElTypeNum == MathML_EL_MO)
/* the element is a MO */
{
content = TtaGetFirstChild (el);
if (content != NULL)
{
elType = TtaGetElementType (content);
if (elType.ElTypeNum == MathML_EL_TEXT_UNIT)
{
len = TtaGetTextLength (content);
if (len == 1)
/* the MO element contains a single character */
{
len = 2;
TtaGiveTextContent (content, text, &len, &lang);
alphabet = TtaGetAlphabet (lang);
if ((alphabet == 'G') &&
((int)text[0] == 229 || (int)text[0] == 213)) /* Sigma, Pi */
/* it's a large operator */
{
ctxt = TtaGetSpecificStyleContext (doc);
ctxt->destroy = FALSE;
/* the specific presentation to be created is not a CSS rule */
ctxt->cssLevel = 0;
pval.typed_data.unit = STYLE_UNIT_PERCENT;
pval.typed_data.real = FALSE;
pval.typed_data.value = 180;
TtaSetStylePresentation (PRSize, content, NULL, ctxt, pval);
}
else if (ChildOfMRowOrInferred (el))
/* the MO element is a child of a MROW element */
{
if ((alphabet == 'L') &&
(text[0] == TEXT('(') || text[0] == TEXT(')') ||
text[0] == TEXT('[') || text[0] == TEXT(']') ||
text[0] == TEXT('{') || text[0] == TEXT('}') ||
text[0] == TEXT('|')))
/* it's a stretchable parenthesis or equivalent */
{
/* remove the content of the MO element */
TtaDeleteTree (content, doc);
/* change the MO element into a MF element */
ChangeTypeOfElement (el, doc, MathML_EL_MF);
/* is there an attribute stretchy on this mo element? */
attrType.AttrSSchema = elType.ElSSchema;
attrType.AttrTypeNum = MathML_ATTR_stretchy;
attrStretchy = TtaGetAttribute (el, attrType);
if (attrStretchy)
val = TtaGetAttributeValue (attrStretchy);
else
val = MathML_ATTR_stretchy_VAL_true;
if (val == MathML_ATTR_stretchy_VAL_true)
{
/* attach a IntVertStretch attribute to the MF element*/
attrType.AttrTypeNum = MathML_ATTR_IntVertStretch;
attr = TtaNewAttribute (attrType);
TtaAttachAttribute (el, attr, doc);
TtaSetAttributeValue (attr,
MathML_ATTR_IntVertStretch_VAL_yes_,
el, doc);
}
/* create a new content for the MF element */
if (text[0] == TEXT('|'))
{
elType.ElTypeNum = MathML_EL_GRAPHICS_UNIT;
c = 'v';
}
else
{
elType.ElTypeNum = MathML_EL_SYMBOL_UNIT;
c = (char) text[0];
}
content = TtaNewElement (doc, elType);
TtaInsertFirstChild (&content, el, doc);
TtaSetGraphicsShape (content, c, doc);
if (elType.ElTypeNum == MathML_EL_GRAPHICS_UNIT)
{
ctxt = TtaGetSpecificStyleContext (doc);
ctxt->destroy = FALSE;
/* the specific presentation to be created is not
a CSS rule */
ctxt->cssLevel = 0;
pval.typed_data.unit = STYLE_UNIT_REL;
pval.typed_data.real = TRUE;
pval.typed_data.value = 200;
TtaSetStylePresentation (PRWidth, content, NULL, ctxt, pval);
}
}
}
}
}
}
}
}
/*----------------------------------------------------------------------
CreateFencedSeparators
Create FencedSeparator elements within the fencedExpression
according to attribute separators of the MFENCED element.
----------------------------------------------------------------------*/
#ifdef __STDC__
void CreateFencedSeparators (Element fencedExpression, Document doc, ThotBool record)
#else
void CreateFencedSeparators (fencedExpression, doc, record)
Element fencedExpression;
Document doc;
ThotBool record;
#endif
{
ElementType elType;
Element child, separator, leaf, next, prev, mfenced;
AttributeType attrType;
Attribute attr;
int length, sep, i;
Language lang;
CHAR_T text[32], sepValue[4];
/* get the separators attribute */
mfenced = TtaGetParent (fencedExpression);
elType = TtaGetElementType (fencedExpression);
attrType.AttrSSchema = elType.ElSSchema;
attrType.AttrTypeNum = MathML_ATTR_separators;
text[0] = ','; /* default value is sparators="," */
text[1] = EOS;
length = 1;
attr = TtaGetAttribute (mfenced, attrType);
if (attr != NULL)
{
length = 31;
TtaGiveTextAttributeValue (attr, text, &length);
}
/* create FencedSeparator elements in the FencedExpression */
prev = NULL;
sep = 0;
/* skip leading spaces in attribute separators */
while (text[sep] <= SPACE && text[sep] != EOS)
sep++;
/* if attribute separators is empty or contains only spaces, do not
insert any separator element */
if (text[sep] != EOS)
{
child = TtaGetFirstChild (fencedExpression);
while (child != NULL)
{
next = child;
TtaNextSibling (&next);
elType = TtaGetElementType (child);
if (elType.ElTypeNum != MathML_EL_Construct)
{
if (prev != NULL)
{
elType.ElTypeNum = MathML_EL_FencedSeparator;
separator = TtaNewElement (doc, elType);
TtaInsertSibling (separator, prev, FALSE, doc);
elType.ElTypeNum = MathML_EL_TEXT_UNIT;
leaf = TtaNewElement (doc, elType);
TtaInsertFirstChild (&leaf, separator, doc);
sepValue[0] = text[sep];
sepValue[1] = SPACE;
sepValue[2] = EOS;
lang = TtaGetLanguageIdFromAlphabet('L');
TtaSetTextContent (leaf, sepValue, lang, doc);
/* is there a following non-space character in separators? */
i = sep + 1;
while (text[i] <= SPACE && text[i] != EOS)
i++;
if (text[i] > SPACE && text[i] != EOS)
sep = i;
if (record)
TtaRegisterElementCreate (separator, doc);
}
prev = child;
}
child = next;
}
}
}
/*----------------------------------------------------------------------
TransformMFENCED
Transform the content of a MFENCED element: create elements
OpeningFence, FencedExpression, ClosingFence and FencedSeparator.
----------------------------------------------------------------------*/
#ifdef __STDC__
static void TransformMFENCED (Element el, Document doc)
#else
static void TransformMFENCED (el, doc)
Element el;
Document doc;
#endif
{
ElementType elType;
Element child, fencedExpression, leaf, fence, next, prev,
firstChild;
AttributeType attrType;
Attribute attr;
int length;
CHAR_T text[32];
char c;
child = TtaGetFirstChild (el);
if (child != NULL)
elType = TtaGetElementType (child);
if (child != NULL && elType.ElTypeNum == MathML_EL_OpeningFence)
/* The first child of this MFENCED element is an OpeningFence.
This MFENCED expression has already been transformed, possibly
by the Transform command */
{
TtaNextSibling (&child);
fencedExpression = child;
if (fencedExpression != NULL)
elType = TtaGetElementType (fencedExpression);
if (elType.ElTypeNum == MathML_EL_FencedExpression)
/* the second child is a FencedExpression. OK.
Remove all existing FencedSeparator elements */
{
child = TtaGetFirstChild (fencedExpression);
prev = NULL;
while (child != NULL)
{
elType = TtaGetElementType (child);
next = child;
TtaNextSibling (&next);
if (elType.ElTypeNum == MathML_EL_FencedSeparator)
/* Remove this separator */
TtaDeleteTree (child, doc);
child = next;
}
/* create FencedSeparator elements in the FencedExpression */
CreateFencedSeparators (fencedExpression, doc, FALSE);
}
}
else
/* this MFENCED element must be transformed */
{
/* create a FencedExpression element as a child of the MFENCED elem. */
elType = TtaGetElementType (el);
elType.ElTypeNum = MathML_EL_FencedExpression;
fencedExpression = TtaNewElement (doc, elType);
TtaInsertFirstChild (&fencedExpression, el, doc);
if (child == NULL)
/* empty MFENCED element */
{
elType.ElTypeNum = MathML_EL_Construct;
child = TtaNewElement (doc, elType);
TtaInsertFirstChild (&child, fencedExpression, doc);
SetIntPlaceholderAttr (child, doc);
}
else
{
/* move the content of the MFENCED element within the new
FencedExpression element */
prev = NULL;
firstChild = NULL;
while (child != NULL)
{
next = child;
TtaNextSibling (&next);
TtaRemoveTree (child, doc);
if (prev == NULL)
{
TtaInsertFirstChild (&child, fencedExpression, doc);
firstChild = child;
}
else
TtaInsertSibling (child, prev, FALSE, doc);
prev = child;
child = next;
}
/* create FencedSeparator elements in the FencedExpression */
CreateFencedSeparators (fencedExpression, doc, FALSE);
/* Create placeholders within the FencedExpression element */
CreatePlaceholders (firstChild, doc);
}
/* create the OpeningFence element according to the open attribute */
c = '(';
attrType.AttrSSchema = elType.ElSSchema;
attrType.AttrTypeNum = MathML_ATTR_open;
attr = TtaGetAttribute (el, attrType);
if (attr != NULL)
{
length = 7;
TtaGiveTextAttributeValue (attr, text, &length);
c = (char)text[0];
}
elType.ElTypeNum = MathML_EL_OpeningFence;
fence = TtaNewElement (doc, elType);
TtaInsertSibling (fence, fencedExpression, TRUE, doc);
elType.ElTypeNum = MathML_EL_SYMBOL_UNIT;
leaf = TtaNewElement (doc, elType);
TtaInsertFirstChild (&leaf, fence, doc);
TtaSetGraphicsShape (leaf, c, doc);
/* create the ClosingFence element according to close attribute */
c = ')';
attrType.AttrTypeNum = MathML_ATTR_close;
attr = TtaGetAttribute (el, attrType);
if (attr != NULL)
{
length = 7;
TtaGiveTextAttributeValue (attr, text, &length);
c = (char) text[0];
}
elType.ElTypeNum = MathML_EL_ClosingFence;
fence = TtaNewElement (doc, elType);
TtaInsertSibling (fence, fencedExpression, FALSE, doc);
elType.ElTypeNum = MathML_EL_SYMBOL_UNIT;
leaf = TtaNewElement (doc, elType);
TtaInsertFirstChild (&leaf, fence, doc);
TtaSetGraphicsShape (leaf, c, doc);
}
}
/*----------------------------------------------------------------------
MathMLScriptShift
The MathML attribute attr (superscriptshift or subscriptshift) is associated
with element el (a msub, msup or msubsup).
If value is not NULL, generate the corresponding Thot VertPos rule for the
Subscript or Superscript child of el.
If value is NULL, remove the Thot VertPos rule.
-----------------------------------------------------------------------*/
#ifdef __STDC__
void MathMLScriptShift (Document doc, Element el, STRING value, int attr)
#else /* __STDC__*/
void MathMLScriptShift (doc, el, value, attr)
Document doc;
Element el;
STRING value;
int attr;
#endif /* __STDC__*/
{
ElementType elType;
Element script, child;
int scrType;
PresentationValue pval;
PresentationContext ctxt;
/* get the Superscript or Subscript child of el */
if (attr == MathML_ATTR_superscriptshift)
scrType = MathML_EL_Superscript;
else if (attr == MathML_ATTR_subscriptshift)
scrType = MathML_EL_Subscript;
else
return;
script = NULL;
child = TtaGetFirstChild (el);
while (!script && child)
{
elType = TtaGetElementType (child);
if (elType.ElTypeNum == scrType)
script = child;
else
TtaNextSibling (&child);
}
if (script)
/* Superscript or Subscript element found */
{
ctxt = TtaGetSpecificStyleContext (doc);
if (!value)
/* remove the presentation rule */
{
ctxt->destroy = TRUE;
pval.typed_data.value = 0;
TtaSetStylePresentation (PRVertPos, script, NULL, ctxt, pval);
}
else
{
ctxt->destroy = FALSE;
/* parse the attribute value (a number followed by a unit) */
value = TtaSkipWCBlanks (value);
value = ParseCSSUnit (value, &pval);
if (pval.typed_data.unit != STYLE_UNIT_INVALID)
{
/* the specific presentation to be created is not a CSS rule */
ctxt->cssLevel = 0;
if (attr == MathML_ATTR_superscriptshift)
pval.typed_data.value = - pval.typed_data.value;
TtaSetStylePresentation (PRVertPos, script, NULL, ctxt, pval);
}
}
TtaFreeMemory (ctxt);
}
}
/*----------------------------------------------------------------------
SetScriptShift
If element el (which is a msup, msub or msubsup) has an attribute
att (which is subscriptshift or superscriptshift), generate the
corresponding Thot presentation rule.
----------------------------------------------------------------------*/
#ifdef __STDC__
static void SetScriptShift (Element el, Document doc, int att)
#else
static void SetScriptShift (el, doc, att)
Element el;
Document doc;
int att;
#endif
{
AttributeType attrType;
ElementType elType;
Attribute attr;
STRING value;
int length;
elType = TtaGetElementType (el);
attrType.AttrSSchema = elType.ElSSchema;
attrType.AttrTypeNum = att;
attr = TtaGetAttribute (el, attrType);
if (attr)
{
length = TtaGetTextAttributeLength (attr);
if (length > 0)
{
value = TtaAllocString (length+1);
value[0] = EOS;
TtaGiveTextAttributeValue (attr, value, &length);
MathMLScriptShift (doc, el, value, att);
TtaFreeMemory (value);
}
}
}
/*----------------------------------------------------------------------
MathMLElementComplete
Check the Thot structure of the MathML element el.
----------------------------------------------------------------------*/
#ifdef __STDC__
void MathMLElementComplete (Element el, Document doc, int *error)
#else
void MathMLElementComplete (el, doc, error)
Element el;
Document doc;
int *error;
#endif
{
ElementType elType, parentType;
Element child, parent, new, prev, next;
AttributeType attrType;
Attribute attr;
SSchema MathMLSSchema;
ThotBool ok;
ok = TRUE;
*error = 0;
elType = TtaGetElementType (el);
MathMLSSchema = GetMathMLSSchema (doc);
if (elType.ElSSchema == MathMLSSchema)
{
switch (elType.ElTypeNum)
{
case MathML_EL_MathML:
/* Create placeholders within the MathML element */
CreatePlaceholders (TtaGetFirstChild (el), doc);
case MathML_EL_MI:
SetFontstyleAttr (el, doc);
break;
case MathML_EL_MO:
SetIntAddSpaceAttr (el, doc);
SetIntVertStretchAttr (el, doc, 0, NULL);
/* if the MO element is a child of a MROW (or equivalent) and if it
contains a fence character, transform this MO into MF and
transform the fence character into a Thot SYMBOL */
CheckFence (el, doc);
break;
case MathML_EL_MSPACE:
break;
case MathML_EL_MROW:
/* Create placeholders within the MROW */
CreatePlaceholders (TtaGetFirstChild (el), doc);
break;
case MathML_EL_MFRAC:
case MathML_EL_BevelledMFRAC:
/* end of a fraction. Create a Numerator and a Denominator */
ok = CheckMathSubExpressions (el, MathML_EL_Numerator,
MathML_EL_Denominator, 0, doc);
break;
case MathML_EL_MSQRT:
/* end of a Square Root */
/* Create placeholders within the element */
CreatePlaceholders (TtaGetFirstChild (el), doc);
/* Create a SqrtBase that contains all children of the MSQRT */
CreateWrapper (el, MathML_EL_SqrtBase, doc);
break;
case MathML_EL_MROOT:
/* end of a Root. Create a RootBase and an Index */
ok = CheckMathSubExpressions (el, MathML_EL_RootBase,
MathML_EL_Index, 0, doc);
break;
case MathML_EL_MENCLOSE:
/* Create placeholders within the element */
CreatePlaceholders (TtaGetFirstChild (el), doc);
break;
case MathML_EL_MSTYLE:
case MathML_EL_MERROR:
case MathML_EL_MPADDED:
case MathML_EL_MPHANTOM:
/* Create placeholders within the element */
CreatePlaceholders (TtaGetFirstChild (el), doc);
break;
case MathML_EL_MFENCED:
TransformMFENCED (el, doc);
break;
case MathML_EL_MSUB:
/* end of a MSUB. Create Base and Subscript */
ok = CheckMathSubExpressions (el, MathML_EL_Base,
MathML_EL_Subscript, 0, doc);
SetScriptShift (el, doc, MathML_ATTR_subscriptshift);
SetIntVertStretchAttr (el, doc, MathML_EL_Base, NULL);
break;
case MathML_EL_MSUP:
/* end of a MSUP. Create Base and Superscript */
ok = CheckMathSubExpressions (el, MathML_EL_Base,
MathML_EL_Superscript, 0, doc);
SetScriptShift (el, doc, MathML_ATTR_superscriptshift);
SetIntVertStretchAttr (el, doc, MathML_EL_Base, NULL);
break;
case MathML_EL_MSUBSUP:
/* end of a MSUBSUP. Create Base, Subscript, and Superscript */
ok = CheckMathSubExpressions (el, MathML_EL_Base,
MathML_EL_Subscript,
MathML_EL_Superscript, doc);
SetScriptShift (el, doc, MathML_ATTR_subscriptshift);
SetScriptShift (el, doc, MathML_ATTR_superscriptshift);
SetIntVertStretchAttr (el, doc, MathML_EL_Base, NULL);
break;
case MathML_EL_MUNDER:
/* end of a MUNDER. Create UnderOverBase, and Underscript */
ok = CheckMathSubExpressions (el, MathML_EL_UnderOverBase,
MathML_EL_Underscript, 0, doc);
SetIntHorizStretchAttr (el, doc);
SetIntVertStretchAttr (el, doc, MathML_EL_UnderOverBase, NULL);
break;
case MathML_EL_MOVER:
/* end of a MOVER. Create UnderOverBase, and Overscript */
ok = CheckMathSubExpressions (el, MathML_EL_UnderOverBase,
MathML_EL_Overscript, 0, doc);
SetIntHorizStretchAttr (el, doc);
SetIntVertStretchAttr (el, doc, MathML_EL_UnderOverBase, NULL);
break;
case MathML_EL_MUNDEROVER:
/* end of a MUNDEROVER. Create UnderOverBase, Underscript, and
Overscript */
ok = CheckMathSubExpressions (el, MathML_EL_UnderOverBase,
MathML_EL_Underscript,
MathML_EL_Overscript, doc);
SetIntHorizStretchAttr (el, doc);
SetIntVertStretchAttr (el, doc, MathML_EL_UnderOverBase, NULL);
break;
case MathML_EL_MMULTISCRIPTS:
/* end of a MMULTISCRIPTS. Create all elements defined in the
MathML S schema */
BuildMultiscript (el, doc);
break;
case MathML_EL_MTABLE:
/* end of a MTABLE. Create all elements defined in the MathML S
schema */
CheckMTable (el, doc, TRUE);
break;
case MathML_EL_MTD:
/* Create placeholders within the table cell */
CreatePlaceholders (TtaGetFirstChild (el), doc);
break;
case MathML_EL_MACTION:
/* Create placeholders within the MACTION element */
CreatePlaceholders (TtaGetFirstChild (el), doc);
break;
default:
break;
}
parent = TtaGetParent (el);
parentType = TtaGetElementType (parent);
if (parentType.ElSSchema != elType.ElSSchema)
/* root of a MathML tree, Create a MathML element if there is no */
if (elType.ElTypeNum != MathML_EL_MathML)
{
elType.ElSSchema = MathMLSSchema;
elType.ElTypeNum = MathML_EL_MathML;
new = TtaNewElement (doc, elType);
TtaInsertSibling (new, el, TRUE, doc);
next = el;
TtaNextSibling (&next);
TtaRemoveTree (el, doc);
TtaInsertFirstChild (&el, new, doc);
prev = el;
while (next != NULL)
{
child = next;
TtaNextSibling (&next);
TtaRemoveTree (child, doc);
TtaInsertSibling (child, prev, FALSE, doc);
prev = child;
}
/* Create placeholders within the MathML element */
CreatePlaceholders (el, doc);
}
}
if (!ok)
/* send an error message */
*error = 1;
}
/*----------------------------------------------------------------------
SetFontfamily
-----------------------------------------------------------------------*/
#ifdef __STDC__
void SetFontfamily (Document doc, Element el, STRING value)
#else /* __STDC__*/
void SetFontfamily (doc, el, value)
Document doc;
Element el;
STRING value;
#endif /* __STDC__*/
{
#define buflen 50
CHAR_T css_command[buflen+20];
usprintf (css_command, TEXT("font-family: %s"), value);
ParseHTMLSpecificStyle (el, css_command, doc, 0, FALSE);
}
/*----------------------------------------------------------------------
MathMLlinethickness
The MathML attribute linthickness is associated with element el. Generate
the corresponding style property for this element.
-----------------------------------------------------------------------*/
#ifdef __STDC__
void MathMLlinethickness (Document doc, Element el, STRING value)
#else /* __STDC__*/
void MathMLlinethickness (doc, el, value)
Document doc;
Element el;
STRING value;
#endif /* __STDC__*/
{
#define buflen 50
CHAR_T css_command[buflen+20];
if (ustrcmp (value, TEXT("thin")) == 0)
ustrcpy (value, TEXT("1pt"));
else if (ustrcmp (value, TEXT("medium")) == 0)
ustrcpy (value, TEXT("1pt"));
else if (ustrcmp (value, TEXT("thick")) == 0)
ustrcpy (value, TEXT("2pt"));
usprintf (css_command, TEXT("stroke-width: %s"), value);
ParseHTMLSpecificStyle (el, css_command, doc, 0, FALSE);
}
/*----------------------------------------------------------------------
MathMLAttrToStyleProperty
The MathML attribute attr is associated with element el. Generate
the corresponding style property for this element.
-----------------------------------------------------------------------*/
#ifdef __STDC__
void MathMLAttrToStyleProperty (Document doc, Element el, STRING value, int attr)
#else /* __STDC__*/
void MathMLAttrToStyleProperty (doc, el, value, attr)
Document doc;
Element el;
STRING value;
int attr;
#endif /* __STDC__*/
{
CHAR_T css_command[buflen+20];
switch (attr)
{
case MathML_ATTR_fontsize:
usprintf (css_command, TEXT("font-size: %s"), value);
break;
case MathML_ATTR_lspace:
usprintf (css_command, TEXT("padding-left: %s"), value);
break;
case MathML_ATTR_rspace:
usprintf (css_command, TEXT("padding-right: %s"), value);
break;
}
ParseHTMLSpecificStyle (el, css_command, doc, 0, FALSE);
}
/*----------------------------------------------------------------------
MathMLSetScriptLevel
A scriptlevel attribute with value value is associated with element el.
Generate the corresponding style property for this element.
-----------------------------------------------------------------------*/
#ifdef __STDC__
void MathMLSetScriptLevel (Document doc, Element el, STRING value)
#else /* __STDC__*/
void MathMLSetScriptLevel (doc, el, value)
Document doc;
Element el;
STRING value;
#endif /* __STDC__*/
{
PresentationValue pval;
PresentationContext ctxt;
ThotBool relative;
int percentage;
ctxt = TtaGetSpecificStyleContext (doc);
if (!value)
/* remove the presentation rule */
{
ctxt->destroy = TRUE;
pval.typed_data.value = 0;
TtaSetStylePresentation (PRSize, el, NULL, ctxt, pval);
}
else
{
ctxt->destroy = FALSE;
/* parse the attribute value (an optional sign and an integer) */
value = TtaSkipWCBlanks (value);
relative = (value[0] == '-' || value[0] == '+');
value = ParseCSSUnit (value, &pval);
if (pval.typed_data.unit != STYLE_UNIT_REL &&
pval.typed_data.real)
/* this is an error: it should be an integer without any unit name */
/* error */;
else
{
if (relative)
{
percentage = 100;
if (pval.typed_data.value == 0)
/* scriptlevel="+0" */
percentage = 100;
else if (pval.typed_data.value == 1)
/* scriptlevel="+1" */
percentage = 71;
else if (pval.typed_data.value == 2)
/* scriptlevel="+2" */
percentage = 50;
else if (pval.typed_data.value >= 3)
/* scriptlevel="+3" or more */
percentage = 35;
else if (pval.typed_data.value == -1)
/* scriptlevel="-1" */
percentage = 141;
else if (pval.typed_data.value == -2)
/* scriptlevel="-2" */
percentage = 200;
else if (pval.typed_data.value <= -3)
/* scriptlevel="-3" or less */
percentage = 282;
pval.typed_data.value = percentage;
pval.typed_data.unit = STYLE_UNIT_PERCENT;
/* the specific presentation to be created is not a CSS rule */
ctxt->cssLevel = 0;
TtaSetStylePresentation (PRSize, el, NULL, ctxt, pval);
}
else
/* absolute value */
{
/**** ****/;
}
}
}
TtaFreeMemory (ctxt);
}
/*----------------------------------------------------------------------
MathMLSpacingAttr
The MathML attribute attr (height, width or depth) is associated
with element el (a mspace or mpadding).
If value is not NULL, generate the corresponding Thot presentation rule for
the element.
If value is NULL, remove the corresponding Thot presentation rule.
-----------------------------------------------------------------------*/
#ifdef __STDC__
void MathMLSpacingAttr (Document doc, Element el, STRING value, int attr)
#else /* __STDC__*/
void MathMLSpacingAttr (doc, el, value, attr)
Document doc;
Element el;
STRING value;
int attr;
#endif /* __STDC__*/
{
ElementType elType;
PresentationValue pval;
PresentationContext ctxt;
int ruleType;
/* provisionally, handles only mspace elements */
elType = TtaGetElementType (el);
if (elType.ElTypeNum != MathML_EL_MSPACE)
return;
switch (attr)
{
case MathML_ATTR_width_:
ruleType = PRWidth;
break;
case MathML_ATTR_height_:
ruleType = PRPaddingTop;
break;
case MathML_ATTR_depth_:
ruleType = PRPaddingBottom;
break;
default:
return;
}
ctxt = TtaGetSpecificStyleContext (doc);
if (!value)
/* remove the presentation rule */
{
ctxt->destroy = TRUE;
pval.typed_data.value = 0;
TtaSetStylePresentation (ruleType, el, NULL, ctxt, pval);
}
else
{
ctxt->destroy = FALSE;
/* parse the attribute value (a number followed by a unit) */
value = TtaSkipWCBlanks (value);
value = ParseCSSUnit (value, &pval);
/***** we should accept namedspace for width *****/
if (pval.typed_data.unit != STYLE_UNIT_INVALID)
{
/* the specific presentation to be created is not a CSS rule */
ctxt->cssLevel = 0;
TtaSetStylePresentation (ruleType, el, NULL, ctxt, pval);
}
}
TtaFreeMemory (ctxt);
}
/*----------------------------------------------------------------------
MathMLAttributeComplete
The XML parser has completed parsing attribute attr (as well as its value)
that is associated with element el in document doc.
----------------------------------------------------------------------*/
#ifdef __STDC__
void MathMLAttributeComplete (Attribute attr, Element el, Document doc)
#else
void MathMLAttributeComplete (attr, el, doc)
Attribute attr;
Element el;
Document doc;
#endif
{
AttributeType attrType;
int attrKind;
ElementType elType;
#define buflen 50
STRING value;
int val, length;
/* first get the type of that attribute */
TtaGiveAttributeType (attr, &attrType, &attrKind);
if (attrType.AttrTypeNum == MathML_ATTR_bevelled)
/* it's a bevelled attribute */
{
val = TtaGetAttributeValue (attr);
if (val == MathML_ATTR_bevelled_VAL_true)
/* bevelled = true. Transform MFRAC into BevelledMFRAC */
{
elType = TtaGetElementType (el);
if (elType.ElTypeNum == MathML_EL_MFRAC)
ChangeTypeOfElement (el, doc, MathML_EL_BevelledMFRAC);
}
}
else if (attrType.AttrTypeNum == MathML_ATTR_color ||
attrType.AttrTypeNum == MathML_ATTR_background_ ||
attrType.AttrTypeNum == MathML_ATTR_fontsize ||
attrType.AttrTypeNum == MathML_ATTR_fontfamily ||
attrType.AttrTypeNum == MathML_ATTR_linethickness ||
attrType.AttrTypeNum == MathML_ATTR_lspace ||
attrType.AttrTypeNum == MathML_ATTR_rspace ||
attrType.AttrTypeNum == MathML_ATTR_scriptlevel ||
attrType.AttrTypeNum == MathML_ATTR_width_ ||
attrType.AttrTypeNum == MathML_ATTR_height_ ||
attrType.AttrTypeNum == MathML_ATTR_depth_ )
{
length = TtaGetTextAttributeLength (attr);
if (length >= buflen)
length = buflen - 1;
if (length > 0)
{
value = TtaAllocString (buflen);
value[0] = EOS;
TtaGiveTextAttributeValue (attr, value, &length);
switch (attrType.AttrTypeNum)
{
case MathML_ATTR_color:
HTMLSetForegroundColor (doc, el, value);
break;
case MathML_ATTR_background_:
HTMLSetBackgroundColor (doc, el, value);
break;
case MathML_ATTR_fontfamily:
SetFontfamily (doc, el, value);
break;
case MathML_ATTR_linethickness:
MathMLlinethickness (doc, el, value);
break;
case MathML_ATTR_fontsize:
case MathML_ATTR_lspace:
case MathML_ATTR_rspace:
MathMLAttrToStyleProperty (doc, el, value,attrType.AttrTypeNum);
break;
case MathML_ATTR_scriptlevel:
MathMLSetScriptLevel (doc, el, value);
break;
case MathML_ATTR_width_:
case MathML_ATTR_height_:
case MathML_ATTR_depth_:
MathMLSpacingAttr (doc, el, value, attrType.AttrTypeNum);
break;
default:
break;
}
TtaFreeMemory (value);
}
}
}
/*----------------------------------------------------------------------
MathMLGetDTDName
----------------------------------------------------------------------*/
#ifdef __STDC__
void MathMLGetDTDName (STRING DTDname, STRING elementName)
#else
void MathMLGetDTDName (DTDname, elementName)
STRING DTDname;
STRING elementName;
#endif
{
/* no other DTD allowed within MathML elements */
ustrcpy (DTDname, TEXT(""));
}
/* end of module */
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