/** Handles the "point" command that adds a point to the point list. */
void EmSpecialHandler::point (InputReader &ir, SpecialActions &actions) {
DPair pos(actions.getX(), actions.getY());
int n = ir.getInt();
if (ir.getPunct() == ',') {
pos.x(ir.getDouble());
if (ir.getPunct() == ',')
pos.y(ir.getDouble());
}
_points[n] = pos;
}
/** 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;
}
/** Evaluates the special dvisvgm:bbox.
* variant 1: dvisvgm:bbox [r[el]] <width> <height> [<depth>]
* variant 2: dvisvgm:bbox a[bs] <x1> <y1> <x2> <y2>
* variant 3: dvisvgm:bbox f[ix] <x1> <y1> <x2> <y2>
* variant 4: dvisvgm:bbox n[ew] <name> */
void DvisvgmSpecialHandler::processBBox (InputReader &ir, SpecialActions *actions) {
const double pt2bp = 72/72.27;
ir.skipSpace();
int c = ir.peek();
if (isalpha(c)) {
while (!isspace(ir.peek())) // skip trailing characters
ir.get();
if (c == 'n') {
ir.skipSpace();
string name;
while (isalnum(ir.peek()))
name += char(ir.get());
ir.skipSpace();
if (!name.empty() && ir.eof())
actions->bbox(name, true); // create new user box
}
else if (c == 'a' || c == 'f') {
double p[4];
for (int i=0; i < 4; i++)
p[i] = ir.getDouble()*pt2bp;
BoundingBox b(p[0], p[1], p[2], p[3]);
if (c == 'a')
actions->embed(b);
else {
actions->bbox() = b;
actions->bbox().lock();
}
}
}
else
c = 'r'; // no mode specifier => relative box parameters
if (c == 'r') {
double w = ir.getDouble()*pt2bp;
double h = ir.getDouble()*pt2bp;
double d = ir.getDouble()*pt2bp;
update_bbox(w, h, d, actions);
}
}
/** Reads a length (value + unit) and returns its value in PS points (bp).
* If no unit is specified, TeX points are assumed. */
static double read_length (InputReader &in) {
double val = in.getDouble();
string unitstr;
if (isalpha(in.peek())) unitstr += in.get();
if (isalpha(in.peek())) unitstr += in.get();
Length::Unit unit = Length::Unit::PT;
try {
unit = Length::stringToUnit(unitstr);
}
catch (UnitException &e) {
}
return Length(val, unit).bp();
}
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);
}
}
