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% pdfrule.w
%
% Copyright 2010-2011 Taco Hoekwater <taco@@luatex.org>
%
% This file is part of LuaTeX.
%
% LuaTeX is free software; you can redistribute it and/or modify it under
% the terms of the GNU General Public License as published by the Free
% Software Foundation; either version 2 of the License, or (at your
% option) any later version.
%
% LuaTeX is distributed in the hope that it will be useful, but WITHOUT
% ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
% FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
% License for more details.
%
% You should have received a copy of the GNU General Public License along
% with LuaTeX; if not, see <http://www.gnu.org/licenses/>.
@ @c
#include "ptexlib.h"
#include "pdf/pdfpage.h"
@ @c
/* maybe we should have an extra callback on normal rules or on any rule in 2.0+ */
void pdf_place_rule(PDF pdf, halfword q, scaledpos size, int callback_id)
{
pdfpos dim;
pdfstructure *p = pdf->pstruct;
scaledpos pos = pdf->posstruct->pos;
halfword s = subtype(q);
/* (void) q; */
if (s >= math_over_rule && s <= math_radical_rule) {
if (callback_id == 0) {
s = normal_rule;
} else {
s = user_rule;
}
}
if (s == box_rule) {
pdf_place_form(pdf,q);
} else if (s == image_rule) {
pdf_place_image(pdf,q);
} else if (s == empty_rule) {
/* place nothing, only take space */
} else if (s == user_rule) {
if (callback_id != 0) {
pdf_goto_pagemode(pdf);
pdf_puts(pdf, "q\n");
pdf_set_pos_temp(pdf, pos);
run_callback(callback_id, "Ndd->",q,size.h,size.v);
pdf_puts(pdf, "\nQ\n");
}
} else {
/* normal_rule or >= 100 being a leader rule */
pdf_goto_pagemode(pdf);
dim.h.m = i64round(size.h * p->k1);
dim.h.e = p->pdf.h.e;
dim.v.m = i64round(size.v * p->k1);
dim.v.e = p->pdf.v.e;
pdf_puts(pdf, "q\n");
if (size.v <= one_bp) {
pos.v += i64round(0.5 * size.v);
pdf_set_pos_temp(pdf, pos);
pdf_puts(pdf, "[]0 d 0 J ");
print_pdffloat(pdf, dim.v);
pdf_puts(pdf, " w 0 0 m ");
print_pdffloat(pdf, dim.h);
pdf_puts(pdf, " 0 l S\n");
} else if (size.h <= one_bp) {
pos.h += i64round(0.5 * size.h);
pdf_set_pos_temp(pdf, pos);
pdf_puts(pdf, "[]0 d 0 J ");
print_pdffloat(pdf, dim.h);
pdf_puts(pdf, " w 0 0 m 0 ");
print_pdffloat(pdf, dim.v);
pdf_puts(pdf, " l S\n");
} else {
pdf_set_pos_temp(pdf, pos);
pdf_puts(pdf, "0 0 ");
print_pdffloat(pdf, dim.h);
pdf_out(pdf, ' ');
print_pdffloat(pdf, dim.v);
pdf_puts(pdf, " re f\n");
}
pdf_puts(pdf, "Q\n");
}
}
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