/** Reads a length value including a trailing unit specifier and returns it. */
static Length read_length (InputReader &ir) {
Length length;
ir.skipSpace();
if (!isalpha(ir.peek())) {
double val = ir.getDouble();
string unit = isalpha(ir.peek()) ? ir.getString(2) : "pt";
length = Length(val, unit);
}
return length;
}
/** Parses a single line in dvips mapfile format.
* @param[in] ir the input stream must be assigned to this reader */
void MapLine::parseDVIPSLine (InputReader &ir) {
ir.skipSpace();
if (ir.peek() != '<' && ir.peek() != '"')
_psname = ir.getString();
ir.skipSpace();
while (ir.peek() == '<' || ir.peek() == '"') {
if (ir.peek() == '<') {
ir.get();
if (ir.peek() == '[')
ir.get();
string name = ir.getString();
if (name.length() > 4 && name.substr(name.length()-4) == ".enc")
_encname = name.substr(0, name.length()-4);
else
_fontfname = name;
}
else { // ir.peek() == '"' => list of PS font operators
string options = ir.getQuotedString('"');
StringInputBuffer sib(options);
BufferInputReader sir(sib);
while (!sir.eof()) {
double number;
if (sir.parseDouble(number)) {
// operator with preceding numeric parameter (value opstr)
string opstr = sir.getString();
if (opstr == "SlantFont")
_slant = number;
else if (opstr == "ExtendFont")
_extend = number;
}
else {
// operator without parameter => skip for now
sir.getString();
}
}
}
ir.skipSpace();
}
}
void DvisvgmSpecialHandler::preprocessRawSet (InputReader &ir) {
_nestingLevel++;
string id = ir.getString();
if (id.empty())
throw SpecialException("definition of unnamed SVG fragment");
if (_nestingLevel > 1)
throw SpecialException("nested definition of SVG fragment '" + id + "'");
_currentMacro = _macros.find(id);
if (_currentMacro != _macros.end()) {
_currentMacro = _macros.end();
throw SpecialException("redefinition of SVG fragment '" + id + "'");
}
pair<string, StringVector> entry(id, StringVector());
pair<MacroMap::iterator, bool> state = _macros.insert(entry);
_currentMacro = state.first;
}
void DvisvgmSpecialHandler::processImg (InputReader &ir, SpecialActions *actions) {
if (actions) {
const double pt2bp = 72/72.27;
double w = ir.getDouble()*pt2bp;
double h = ir.getDouble()*pt2bp;
string f = ir.getString();
update_bbox(w, h, 0, actions);
XMLElementNode *img = new XMLElementNode("image");
img->addAttribute("x", actions->getX());
img->addAttribute("y", actions->getY());
img->addAttribute("width", w);
img->addAttribute("height", h);
img->addAttribute("xlink:href", f);
if (!actions->getMatrix().isIdentity())
img->addAttribute("transform", actions->getMatrix().getSVG());
actions->appendToPage(img);
}
}
void DvisvgmSpecialHandler::processImg (InputReader &ir, SpecialActions &actions) {
try {
Length w = read_length(ir);
Length h = read_length(ir);
string f = ir.getString();
update_bbox(w, h, Length(0), false, actions);
auto img = util::make_unique<XMLElement>("image");
img->addAttribute("x", actions.getX());
img->addAttribute("y", actions.getY());
img->addAttribute("width", w.bp());
img->addAttribute("height", h.bp());
img->addAttribute("xlink:href", f);
if (!actions.getMatrix().isIdentity())
img->addAttribute("transform", actions.getMatrix().toSVG());
actions.svgTree().appendToPage(std::move(img));
}
catch (const UnitException &e) {
throw SpecialException(string("dvisvgm:img: ") + e.what());
}
}
void DvisvgmSpecialHandler::processRawPut (InputReader &ir, SpecialActions *actions) {
if (_nestingLevel > 0)
return;
string id = ir.getString();
MacroMap::iterator it = _macros.find(id);
if (it == _macros.end())
throw SpecialException("undefined SVG fragment '" + id + "' referenced");
StringVector &defs = it->second;
for (StringVector::iterator defs_it=defs.begin(); defs_it != defs.end(); ++defs_it) {
char &type = defs_it->at(0);
string def = defs_it->substr(1);
if ((type == 'P' || type == 'D') && !def.empty()) {
expand_constants(def, actions);
if (type == 'P')
actions->appendToPage(new XMLTextNode(def));
else { // type == 'D'
actions->appendToDefs(new XMLTextNode(def));
type = 'L'; // locked
}
}
}
}
void DvisvgmSpecialHandler::processRawPut (InputReader &ir, SpecialActions &actions) {
if (_nestingLevel > 0)
return;
string id = ir.getString();
auto it = _macros.find(id);
if (it == _macros.end())
throw SpecialException("undefined SVG fragment '" + id + "' referenced");
StringVector &defvector = it->second;
for (string &defstr : defvector) {
char &type = defstr[0];
string def = defstr.substr(1);
if ((type == 'P' || type == 'D') && !def.empty()) {
expand_constants(def, actions);
if (type == 'P')
_pageParser.parse(def, actions);
else { // type == 'D'
_defsParser.parse(def, actions);
type = 'L'; // locked
}
}
}
}
/** Parses a single line in dvipdfmx mapfile format.
* @param[in] ir the input stream must be assigned to this reader */
void MapLine::parseDVIPDFMLine (InputReader &ir) {
ir.skipSpace();
if (ir.peek() != '-') {
_encname = ir.getString();
if (_encname == "default" || _encname == "none")
_encname.clear();
}
ir.skipSpace();
if (ir.peek() != '-')
_fontfname = ir.getString();
if (!_fontfname.empty()) {
parseFilenameOptions(_fontfname);
}
ir.skipSpace();
while (ir.peek() == '-') {
ir.get();
int option = ir.get();
if (!isprint(option))
throw MapLineException("option character expected");
ir.skipSpace();
switch (option) {
case 's': // slant
if (!ir.parseDouble(_slant))
throw_number_expected('s');
break;
case 'e': // extend
if (!ir.parseDouble(_extend))
throw_number_expected('e');
break;
case 'b': // bold
if (!ir.parseDouble(_bold))
throw_number_expected('b');
break;
case 'r': //remap (deprecated)
break;
case 'i': // ttc index
if (!ir.parseInt(_fontindex, false))
throw_number_expected('i', true);
break;
case 'p': // UCS plane
int dummy;
if (!ir.parseInt(dummy, false))
throw_number_expected('p', true);
break;
case 'u': // to unicode
ir.getString();
break;
case 'v': // stemV
int stemv;
if (!ir.parseInt(stemv, true))
throw_number_expected('v', true);
break;
case 'm': // map single chars
ir.skipUntil("-");
break;
case 'w': // writing mode (horizontal=0, vertical=1)
int vertical;
if (!ir.parseInt(vertical, false))
throw_number_expected('w', true);
break;
default:
ostringstream oss;
oss << "invalid option: -" << option;
throw MapLineException(oss.str());
}
ir.skipSpace();
}
}
