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/*************************************************************************
** DVIToSVGActions.cpp **
** **
** This file is part of dvisvgm -- the DVI to SVG converter **
** Copyright (C) 2005-2009 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/>. **
*************************************************************************/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <cstring>
#include "BoundingBox.h"
#include "CharmapTranslator.h"
#include "DVIToSVG.h"
#include "DVIToSVGActions.h"
#include "Font.h"
#include "FontManager.h"
#include "Ghostscript.h"
#include "SpecialManager.h"
#include "XMLNode.h"
#include "XMLString.h"
using namespace std;
unsigned DVIToSVGActions::PROGRESSBAR = 0;
DVIToSVGActions::DVIToSVGActions (DVIToSVG &dvisvg, SVGTree &svg)
: _svg(svg), _dvisvg(dvisvg), _pageMatrix(0), _bgcolor(Color::WHITE)
{
_currentFontNum = -1;
_pageCount = 0;
}
DVIToSVGActions::~DVIToSVGActions () {
delete _pageMatrix;
FORALL (_charmapTranslatorMap, CharmapTranslatorMap::iterator, i)
delete i->second;
}
void DVIToSVGActions::setPageMatrix (const Matrix &matrix) {
delete _pageMatrix;
_pageMatrix = new Matrix(matrix);
}
/** This method is called when a "set char" command was found in the DVI file.
* It draws a character of the current font.
* @param[in] x horizontal position of left bounding box edge
* @param[in] y vertical position of the character's baseline
* @param[in] c character code relative to the current font
* @param[in] font font to be used */
void DVIToSVGActions::setChar (double x, double y, unsigned c, const Font *font) {
/* x *= BP;
y *= BP; */
if (DVIToSVG::USE_FONTS) {
// If we use SVG fonts there is no need to record all font name/char/size combinations
// because the SVG font mechanism handles this automatically. It's sufficient to
// record font names and chars. The various font sizes can be ignored here.
// For a given font object, Font::uniqueFont() returns the same unique font object for
// all fonts with the same name.
font = font->uniqueFont();
}
_usedCharsMap[font].insert(c);
const CharmapTranslator *cmt = _charmapTranslatorMap[font->uniqueFont()];
_svg.appendChar(c, x, y, _dvisvg.getFontManager(), *cmt);
// update bounding box
if (font) {
/* x *= BP;
y *= BP;*/
double s = font->scaleFactor(); // * BP;
double w = s*(font->charWidth(c) + font->italicCorr(c));
double h = s*font->charHeight(c);
double d = s*font->charDepth(c);
BoundingBox charbox(x, y-h, x+w, y+d);
if (!getMatrix().isIdentity())
charbox.transform(getMatrix());
_bbox.embed(charbox);
}
}
/** This method is called when a "set rule" or "put rule" command was found in the
* DVI file. It draws a solid unrotated rectangle.
* @param[in] x horizontal position of left edge
* @param[in] y vertical position of bottom(!) edge
* @param[in] height length of the vertical edges
* @param[in] width length of the horizontal edges */
void DVIToSVGActions::setRule (double x, double y, double height, double width) {
/* x *= BP;
y *= BP;
height *= BP;
width *= BP; */
// (x,y) is the lower left corner of the rectangle
XMLElementNode *rect = new XMLElementNode("rect");
rect->addAttribute("x", x);
rect->addAttribute("y", y-height);
rect->addAttribute("height", height);
rect->addAttribute("width", width);
if (!getMatrix().isIdentity())
rect->addAttribute("transform", getMatrix().getSVG());
if (getColor() != Color::BLACK)
rect->addAttribute("fill", _svg.getColor().rgbString());
_svg.appendToPage(rect);
// update bounding box
BoundingBox bb(x, y+height, x+width, y);
if (!getMatrix().isIdentity())
bb.transform(getMatrix());
_bbox.embed(bb);
}
void DVIToSVGActions::defineFont (int num, const Font *font) {
font = font->uniqueFont();
if (_charmapTranslatorMap.find(font) == _charmapTranslatorMap.end())
_charmapTranslatorMap[font] = new CharmapTranslator(font);
}
/** This method is called when a "set font" command was found in the DVI file. The
* font must be previously defined.
* @param[in] num unique number of the font in the DVI file (not necessarily equal to the DVI font number)
* @param[in] font pointer to the font object (always represents a physical font and never a virtual font) */
void DVIToSVGActions::setFont (int num, const Font *font) {
_currentFontNum = num;
_svg.setFont(num, font);
}
/** This method is called when a "special" command was found in the DVI file.
* @param[in] s the special expression */
void DVIToSVGActions::special (const string &s) {
try {
_dvisvg.specialManager().process(s, this, this);
// @@ output message in case of unsupported specials?
}
catch (const SpecialException &e) {
Message::estream(true) << "error in special '" << s << "': " << e.getMessage() << endl;
}
}
void DVIToSVGActions::beginSpecial (const char *prefix) {
static unsigned count = 0;
if (PROGRESSBAR > 0 && ++count % PROGRESSBAR == 0) {
if (count == PROGRESSBAR)
Message::mstream(false) << ':';
Message::mstream(false) << '=';
}
}
void DVIToSVGActions::endSpecial (const char *) {
}
/** This method is called when the DVI preamble was read
* @param[in] cmt preamble comment text. */
void DVIToSVGActions::preamble (const string &cmt) {
}
void DVIToSVGActions::postamble () {
}
/** This method is called when a "begin of page (bop)" command was found in the DVI file.
* @param[in] c array with 10 components representing \count0 ... \count9. c[0] contains the
* current (printed) page number (may differ from page count) */
void DVIToSVGActions::beginPage (Int32 *c) {
_svg.newPage(++_pageCount);
_bbox = BoundingBox(); // clear bounding box
}
CharmapTranslator* DVIToSVGActions::getCharmapTranslator (const Font *font) const {
if (font) {
CharmapTranslatorMap::const_iterator it = _charmapTranslatorMap.find(font->uniqueFont());
if (it != _charmapTranslatorMap.end())
return it->second;
}
return 0;
}
/** This method is called when an "end of page (eop)" command was found in the DVI file. */
void DVIToSVGActions::endPage () {
if (_pageMatrix)
_svg.transformPage(*_pageMatrix);
if (_bgcolor != Color::WHITE) {
XMLElementNode *r = new XMLElementNode("rect");
r->addAttribute("x", _bbox.minX());
r->addAttribute("y", _bbox.minY());
r->addAttribute("width", _bbox.width());
r->addAttribute("height", _bbox.height());
r->addAttribute("fill", _bgcolor.rgbString());
_svg.prependToPage(r);
}
}
void DVIToSVGActions::setBgColor (const Color &color) {
_bgcolor = color;
}
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