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Diffstat (limited to 'Build/source/texk/dvisvgm/dvisvgm-1.0.3/src/DVIToSVGActions.cpp')
| -rw-r--r-- | Build/source/texk/dvisvgm/dvisvgm-1.0.3/src/DVIToSVGActions.cpp | 332 |
1 files changed, 332 insertions, 0 deletions
diff --git a/Build/source/texk/dvisvgm/dvisvgm-1.0.3/src/DVIToSVGActions.cpp b/Build/source/texk/dvisvgm/dvisvgm-1.0.3/src/DVIToSVGActions.cpp new file mode 100644 index 00000000000..d3043bffd5b --- /dev/null +++ b/Build/source/texk/dvisvgm/dvisvgm-1.0.3/src/DVIToSVGActions.cpp @@ -0,0 +1,332 @@ +/************************************************************************* +** DVIToSVGActions.cpp ** +** ** +** This file is part of dvisvgm -- the DVI to SVG converter ** +** Copyright (C) 2005-2010 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 <cstring> +#include <ctime> +#include "BoundingBox.h" +#include "DVIToSVG.h" +#include "DVIToSVGActions.h" +#include "Font.h" +#include "FontManager.h" +#include "Ghostscript.h" +#include "GlyphTracerMessages.h" +#include "SpecialManager.h" +#include "System.h" +#include "XMLNode.h" +#include "XMLString.h" + +using namespace std; + + +double DVIToSVGActions::PROGRESSBAR_DELAY=1000; // initial delay in seconds (values >= 1000 disable the progressbar) +bool DVIToSVGActions::EXACT_BBOX = false; + + +DVIToSVGActions::DVIToSVGActions (DVIToSVG &dvisvg, SVGTree &svg) + : _svg(svg), _dvisvg(dvisvg), _pageMatrix(0), _bgcolor(Color::WHITE), _boxes(0) +{ + _currentFontNum = -1; + _pageCount = 0; +} + + +DVIToSVGActions::~DVIToSVGActions () { + delete _pageMatrix; + delete _boxes; +} + + +void DVIToSVGActions::reset() { + _usedChars.clear(); + _usedFonts.clear(); + _bbox = BoundingBox(); + _currentFontNum = -1; + _bgcolor = Color::WHITE; +} + + +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) { + // 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. + _usedChars[SVGTree::USE_FONTS ? font->uniqueFont() : font].insert(c); + + // However, we record all required fonts + _usedFonts.insert(font); + + _svg.appendChar(c, x, y, *font); + // update bounding box + double wl=0, wr=0, h=0, d=0; // left/right width, height, and depth of character c + static string fontname; + GlyphTracerMessages callback(fontname != font->name(), false); + fontname = font->name(); + BoundingBox charbox; + const PhysicalFont *ph_font = dynamic_cast<const PhysicalFont*>(font); + if (EXACT_BBOX && ph_font && ph_font->getGlyphBox(c, charbox, &callback)) { + if ((wl = charbox.minX()) > 0) wl=0; + if ((wr = charbox.maxX()) < 0) wr=0; + if ((h = charbox.maxY()) < 0) h=0; + if ((d = -charbox.minY()) < 0) d=0; + } + else { + double s = font->scaleFactor(); + wr = s*(font->charWidth(c) + font->italicCorr(c)); + h = s*font->charHeight(c); + d = s*font->charDepth(c); + } + + BoundingBox bbox(x+wl, y-h, x+wr, y+d); +/* XMLElementNode *rect = new XMLElementNode("rect"); + rect->addAttribute("x", x+wl); + rect->addAttribute("y", y-h); + rect->addAttribute("width", (-wl+wr)); + rect->addAttribute("height", (h+d)); + rect->addAttribute("fill", "none"); + rect->addAttribute("stroke", "red"); + rect->addAttribute("stroke-width", "0.5"); + _svg.appendToPage(rect);*/ + if (!getMatrix().isIdentity()) + bbox.transform(getMatrix()); + embed(bbox); +} + + +/** 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()); + embed(bb); +} + + +/** 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() << '\n'; + } +} + + +void DVIToSVGActions::beginSpecial (const char *prefix) { +} + + +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 (unsigned n, Int32 *c) { + _svg.newPage(++_pageCount); + _bbox = BoundingBox(); // clear bounding box + if (_boxes) + _boxes->clear(); +} + + +/** 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; +} + + +void DVIToSVGActions::embed(const BoundingBox& bbox) { + _bbox.embed(bbox); + if (_boxes) { + FORALL(*_boxes, BoxMap::iterator, it) + it->second.embed(bbox); + } +} + + +void DVIToSVGActions::embed(const DPair& p, double r) { + if (r == 0) + _bbox.embed(p); + else + _bbox.embed(p, r); + if (_boxes) + FORALL(*_boxes, BoxMap::iterator, it) + it->second.embed(p, r); +} + + +BoundingBox& DVIToSVGActions::bbox(const string& name, bool reset) { + if (!_boxes) + _boxes = new BoxMap; + BoundingBox &box = (*_boxes)[name]; + if (reset) + box = BoundingBox(); + return box; +} + + +/** This method is called by subprocesses like the PS handler when + * a computation step has finished. Since the total number of steps + * can't be determined in advance, we don't show a percent value but + * a rotating dash. */ +void DVIToSVGActions::progress (const char *id) { + if (PROGRESSBAR_DELAY < 1000) { + static double time=0; + // slow down updating of the progress indicator to prevent flickering + if (System::time() - time > 0.1) { + progress(0, 0, id); + time = System::time(); + } + } +} + + +/** Returns the number of digits of a given integer. */ +static int digits (int n) { + if (n == 0) + return 1; + if (n > 0) + return int(log10(double(n))+1); + return int(log10(double(-n))+2); +} + + +/** Draws a simple progress indicator. + * @param[in] current current iteration step (of 'total' steps) + * @param[in] total total number of iteration steps + * @param[in] id ID of the subprocess providing the information */ +void DVIToSVGActions::progress (size_t current, size_t total, const char *id) { + static double time=0; + static bool draw=false; // show progress indicator? + static int step = -1; // >=0: rotating dash + static size_t prev_current=0, prev_total=1; + static const char *prev_id=0; + const char *tips = "-\\|/"; + if (current == 0 && total > 0) { + time = System::time(); + draw = false; + Message::mstream() << '\n'; + } + // don't show the progress indicator before the given time has elapsed + if (!draw && System::time()-time > PROGRESSBAR_DELAY) + draw = true; + if (draw && (System::time() - time > 0.1 || (total > 0 && current == total) || prev_id != id)) { + if (total == 0) { + current = prev_current; + total = prev_total; + step = (step+1) % 4; + } + else { + prev_current = current; + prev_total = total; + step = -1; + } + // adapt length of progress indicator to terminal width + int cols = Terminal::columns(); + int width = (cols == 0 || cols > 60) ? 50 : 49-60+cols; + double factor = double(current)/double(total); + int length = int(width*factor); + Message::mstream(false, Terminal::MAGENTA) + << '[' << string(length, '=') + << (factor < 1.0 ? (step < 0 ? ' ' : tips[step]) : '=') + << string(width-length, ' ') + << "] " << string(3-digits(int(100*factor)), ' ') << int(100*factor) + << "%\r"; + // overprint indicator when finished + if (factor == 1.0) + Message::estream().clearline(); + time = System::time(); + prev_id = id; + } +} |