diff options
author | Peter Breitenlohner <peb@mppmu.mpg.de> | 2014-09-15 09:15:29 +0000 |
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committer | Peter Breitenlohner <peb@mppmu.mpg.de> | 2014-09-15 09:15:29 +0000 |
commit | ac391ad3f024072af6dbc29e6242e01626fa68e3 (patch) | |
tree | 1d189f720c595af76a58674680a6d0ce3b5ce46d /Build/source/texk/dvisvgm/dvisvgm-1.8/src/EmSpecialHandler.cpp | |
parent | 57e5dbc43fa038cd4a9926b870f04e543e7a3844 (diff) |
dvisvgm 1.8.1
git-svn-id: svn://tug.org/texlive/trunk@35175 c570f23f-e606-0410-a88d-b1316a301751
Diffstat (limited to 'Build/source/texk/dvisvgm/dvisvgm-1.8/src/EmSpecialHandler.cpp')
-rw-r--r-- | Build/source/texk/dvisvgm/dvisvgm-1.8/src/EmSpecialHandler.cpp | 233 |
1 files changed, 0 insertions, 233 deletions
diff --git a/Build/source/texk/dvisvgm/dvisvgm-1.8/src/EmSpecialHandler.cpp b/Build/source/texk/dvisvgm/dvisvgm-1.8/src/EmSpecialHandler.cpp deleted file mode 100644 index 2d944e9433d..00000000000 --- a/Build/source/texk/dvisvgm/dvisvgm-1.8/src/EmSpecialHandler.cpp +++ /dev/null @@ -1,233 +0,0 @@ -/************************************************************************* -** EmSpecialHandler.cpp ** -** ** -** This file is part of dvisvgm -- the DVI to SVG converter ** -** Copyright (C) 2005-2014 Martin Gieseking <martin.gieseking@uos.de> ** -** ** -** This program 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 3 of ** -** the License, or (at your option) any later version. ** -** ** -** This program 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 General Public License for more details. ** -** ** -** You should have received a copy of the GNU General Public License ** -** along with this program; if not, see <http://www.gnu.org/licenses/>. ** -*************************************************************************/ - -#include <config.h> -#include <sstream> -#include "EmSpecialHandler.h" -#include "InputBuffer.h" -#include "InputReader.h" -#include "SpecialActions.h" -#include "XMLNode.h" -#include "XMLString.h" - -using namespace std; - - -EmSpecialHandler::EmSpecialHandler () : _linewidth(0.4*72/72.27), _actions(0) { -} - - -/** Computes the "cut vector" that is used to compute the line shape. - * Because each line has a width > 0 the actual shape of the line is a tetragon. - * The 4 vertices can be influenced by the cut parameter c that specifies - * a horizontal, vertical or orthogonal cut of a line end. Depending on c and the - * line's slope a cut vector v can be computed that, relatively to endpoint p, denotes - * the 2 vertices of that line end: v1=p+v and v2=p-v. - * @param[in] c cut direction ('h', 'v' or 'p') - * @param[in] v direction vector of line to be drawn - * @param[in] lw width of line to be drawn - * @return the "cut vector" */ -static DPair cut_vector (char c, const DPair &v, double lw) { - if (c == 'p') - return v.ortho()/v.length() * (lw/2); - DPair cut; - if (c == 'v' && v.x() != 0) { - double slope = v.y()/v.x(); - double h = sqrt(lw*lw*(1+slope*slope)); - cut.y(0.5*h); - } - else if (v.y() != 0) { // c == 'h' - double slope = v.x()/v.y(); - double h = sqrt(lw*lw*(1+slope*slope)); - double sgn = slope < 0 ? 1.0 : -1.0; - cut.x(0.5*h*sgn); - } - return cut; -} - - -/** Creates the SVG element that will a the line. - * @param[in] p1 first endpoint in PS point units - * @param[in] p2 second endpoint in PS point units - * @param[in] c1 cut method of first endpoint ('h', 'v' or 'p') - * @param[in] c2 cut method of second endpoint ('h', 'v' or 'p') - * @param[in] lw line width in PS point units - * @param[in] actions object providing the actions that can be performed by the SpecialHandler */ -static void create_line (const DPair &p1, const DPair &p2, char c1, char c2, double lw, SpecialActions *actions) { - XMLElementNode *node=0; - DPair dir = p2-p1; - if (dir.x() == 0 || dir.y() == 0 || (c1 == 'p' && c2 == 'p')) { - // draw regular line - node = new XMLElementNode("line"); - node->addAttribute("x1", p1.x()); - node->addAttribute("y1", p1.y()); - node->addAttribute("x2", p2.x()); - node->addAttribute("y2", p2.y()); - node->addAttribute("stroke-width", lw); - node->addAttribute("stroke", actions->getColor().rgbString()); - // update bounding box - actions->embed(p1); - actions->embed(p2); - } - else { - // draw polygon - DPair cv1 = cut_vector(c1, dir, lw); - DPair cv2 = cut_vector(c2, dir, lw); - DPair q11 = p1+cv1, q12 = p1-cv1; - DPair q21 = p2+cv2, q22 = p2-cv2; - node = new XMLElementNode("polygon"); - ostringstream oss; - oss << XMLString(q11.x()) << ',' << XMLString(q11.y()) << ' ' - << XMLString(q12.x()) << ',' << XMLString(q12.y()) << ' ' - << XMLString(q22.x()) << ',' << XMLString(q22.y()) << ' ' - << XMLString(q21.x()) << ',' << XMLString(q21.y()); - node->addAttribute("points", oss.str()); - if (actions->getColor() != Color::BLACK) - node->addAttribute("fill", actions->getColor().rgbString()); - // update bounding box - actions->embed(q11); - actions->embed(q12); - actions->embed(q21); - actions->embed(q22); - } - actions->appendToPage(node); -} - - -static double read_length (InputReader &in) { - struct Unit { - const char *name; - double factor; - } - units[] = { - {"pt", 1.0}, - {"pc", 12.0}, - {"in", 72.27}, - {"bp", 72.27/72}, - {"cm", 72.27/2.54}, - {"mm", 72.27/25.4}, - {"dd", 1238.0/1157}, - {"cc", 1238.0/1157*12}, - {"sp", 1.0/65536}, - {0, 0} - }; - double len = in.getDouble(); - in.skipSpace(); - for (Unit *p=units; p->name; p++) - if (in.check(p->name)) { - len *= p->factor; - break; - } - return len*72/72.27; -} - - -bool EmSpecialHandler::process (const char *prefix, istream &is, SpecialActions *actions) { - // em:moveto => move graphic cursor to dvi cursor - // em:lineto => draw line from graphic cursor to dvi cursor, move graphic cursor to dvi cursor - // em:linewidth <w> => set line width to <w> - // em:point <n>[,<x>[,<y>]] => defines point <n> as (<x>,<y>); if <x> and/or <y> is missing, - // the corresponding dvi cursor coordinate is inserted - // <x> and <y> are lengths - // em:line <n>[h|v|p], <m>[h|v|p] [,<w>] => draws line of width <w> from point #<n> to point #<m> - // point number suffixes: - // h: cut line horizontally - // v: cut line vertically - // p: cut line orthogonally to line direction (default) - // if <w> is omitted, the global line width is used - // - // supported length units: pt, pc, in, bp, cm, mm, dd, cc, sp - // default line width: 0.4pt - - if (actions) { - _actions = actions; // save pointer to SpecialActions for later use in endPage - StreamInputBuffer ib(is, 128); - BufferInputReader in(ib); - string cmd = in.getWord(); - if (cmd == "moveto") - _pos = DPair(actions->getX(), actions->getY()); - else if (cmd == "lineto") { - DPair p(actions->getX(), actions->getY()); - create_line(_pos, p, 'p', 'p', _linewidth, actions); - _pos = p; - } - else if (cmd == "linewidth") - _linewidth = read_length(in); - else if (cmd == "point") { - DPair p(actions->getX(), actions->getY()); - int n = in.getInt(); - if (in.getPunct() == ',') { - p.x(in.getDouble()); - if (in.getPunct() == ',') - p.y(in.getDouble()); - } - _points[n] = p; - } - else if (cmd == "line") { - int n1 = in.getInt(); - int c1 = 'p'; - if (isalpha(in.peek())) - c1 = in.get(); - in.getPunct(); - int n2 = in.getInt(); - int c2 = 'p'; - if (isalpha(in.peek())) - c2 = in.get(); - double lw = _linewidth; - if (in.getPunct() == ',') - lw = read_length(in); - map<int,DPair>::iterator it1=_points.find(n1); - map<int,DPair>::iterator it2=_points.find(n2); - if (it1 != _points.end() && it2 != _points.end()) - create_line(it1->second, it2->second, char(c1), char(c2), lw, actions); - else { - // Line endpoints havn't necessarily to be defined before - // a line definition. If a point wasn't defined yet we push the line - // in a wait list and process the lines at the end of the page. - _lines.push_back(Line(n1, n2, char(c1), char(c2), lw)); - } - } - } - return true; -} - - -/** This method is called at the end of a DVI page. Here we have to draw all pending - * lines that are still in the line list. All line endpoints must be defined until here. */ -void EmSpecialHandler::dviEndPage (unsigned pageno) { - if (_actions) { - FORALL(_lines, list<Line>::iterator, it) { - map<int,DPair>::iterator pit1=_points.find(it->p1); - map<int,DPair>::iterator pit2=_points.find(it->p2); - if (pit1 != _points.end() && pit2 != _points.end()) - create_line(pit1->second, pit2->second, it->c1, it->c2, it->width, _actions); - // all lines with still undefined points are ignored - } - } - // line and point definitions are local to a page - _lines.clear(); - _points.clear(); -} - - -const char** EmSpecialHandler::prefixes () const { - static const char *pfx[] = {"em:", 0}; - return pfx; -} |