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tdegraphics/kdvi/dviRenderer_draw.cpp

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/*
* Copyright (c) 1994 Paul Vojta. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* NOTE:
* xdvi is based on prior work as noted in the modification history, below.
*/
/*
* DVI previewer for X.
*
* Eric Cooper, CMU, September 1985.
*
* Code derived from dvi-imagen.c.
*
* Modification history:
* 1/1986 Modified for X.10 --Bob Scheifler, MIT LCS.
* 7/1988 Modified for X.11 --Mark Eichin, MIT
* 12/1988 Added 'R' option, toolkit, magnifying glass
* --Paul Vojta, UC Berkeley.
* 2/1989 Added tpic support --Jeffrey Lee, U of Toronto
* 4/1989 Modified for System V --Donald Richardson, Clarkson Univ.
* 3/1990 Added VMS support --Scott Allendorf, U of Iowa
* 7/1990 Added reflection mode --Michael Pak, Hebrew U of Jerusalem
* 1/1992 Added greyscale code --Till Brychcy, Techn. Univ. Muenchen
* and Lee Hetherington, MIT
* 4/1994 Added DPS support, bounding box
* --Ricardo Telichevesky
* and Luis Miguel Silveira, MIT RLE.
*/
//#define DEBUG_RENDER 0
#include <config.h>
#include "dviRenderer.h"
#include "dvi.h"
#include "dviFile.h"
#include "fontpool.h"
#include "hyperlink.h"
#include "kdvi_multipage.h"
#include "performanceMeasurement.h"
#include "psgs.h"
#include "renderedDviPagePixmap.h"
#include "TeXFont.h"
#include "textBox.h"
#include "xdvi.h"
#include <stdlib.h>
#include <kdebug.h>
#include <klocale.h>
#include <kmessagebox.h>
#include <kprocess.h>
#include <tqpainter.h>
#include <tqbitmap.h>
#include <tqimage.h>
#include <tqpainter.h>
#include <tqfileinfo.h>
extern TQPainter *foreGroundPainter;
/** Routine to print characters. */
void dviRenderer::set_char(unsigned int cmd, unsigned int ch)
{
#ifdef DEBUG_RENDER
kdDebug(4300) << "set_char #" << ch << endl;
#endif
glyph *g;
if (colorStack.isEmpty())
g = ((TeXFont *)(currinf.fontp->font))->getGlyph(ch, true, globalColor);
else
g = ((TeXFont *)(currinf.fontp->font))->getGlyph(ch, true, colorStack.top());
if (g == NULL)
return;
long dvi_h_sav = currinf.data.dvi_h;
TQPixmap pix = g->shrunkenCharacter;
int x = ((int) ((currinf.data.dvi_h) / (shrinkfactor * 65536))) - g->x2;
int y = currinf.data.pxl_v - g->y2;
// Draw the character.
foreGroundPainter->drawPixmap(x, y, pix);
// Are we drawing text for a hyperlink? And are hyperlinks
// enabled?
if (HTML_href != NULL) {
// Now set up a rectangle which is checked against every mouse
// event.
if (line_boundary_encountered == true) {
// Set up hyperlink
Hyperlink dhl;
dhl.baseline = currinf.data.pxl_v;
dhl.box.setRect(x, y, pix.width(), pix.height());
dhl.linkText = *HTML_href;
currentlyDrawnPage->hyperLinkList.push_back(dhl);
} else {
TQRect dshunion = currentlyDrawnPage->hyperLinkList[currentlyDrawnPage->hyperLinkList.size()-1].box.unite(TQRect(x, y, pix.width(), pix.height())) ;
currentlyDrawnPage->hyperLinkList[currentlyDrawnPage->hyperLinkList.size()-1].box = dshunion;
}
}
// Are we drawing text for a source hyperlink? And are source
// hyperlinks enabled?
// If we are printing source hyperlinks are irrelevant, otherwise we
// actually got a pointer to a RenderedDviPagePixmap.
RenderedDviPagePixmap* currentDVIPage = dynamic_cast<RenderedDviPagePixmap*>(currentlyDrawnPage);
if (source_href != 0 && currentDVIPage) {
// Now set up a rectangle which is checked against every mouse
// event.
if (line_boundary_encountered == true) {
// Set up source hyperlinks
Hyperlink dhl;
dhl.baseline = currinf.data.pxl_v;
dhl.box.setRect(x, y, pix.width(), pix.height());
if (source_href != NULL)
dhl.linkText = *source_href;
else
dhl.linkText = "";
currentDVIPage->sourceHyperLinkList.push_back(dhl);
} else {
TQRect dshunion = currentDVIPage->sourceHyperLinkList[currentDVIPage->sourceHyperLinkList.size()-1].box.unite(TQRect(x, y, pix.width(), pix.height())) ;
currentDVIPage->sourceHyperLinkList[currentDVIPage->sourceHyperLinkList.size()-1].box = dshunion;
}
}
// Code for DVI -> text functions (e.g. marking of text, full text
// search, etc.). Set up the currentlyDrawnPage->textBoxList.
TextBox link;
link.box.setRect(x, y, pix.width(), pix.height());
link.text = "";
currentlyDrawnPage->textBoxList.push_back(link);
switch(ch) {
case 0x0b:
currentlyDrawnPage->textBoxList[currentlyDrawnPage->textBoxList.size()-1].text += "ff";
break;
case 0x0c:
currentlyDrawnPage->textBoxList[currentlyDrawnPage->textBoxList.size()-1].text += "fi";
break;
case 0x0d:
currentlyDrawnPage->textBoxList[currentlyDrawnPage->textBoxList.size()-1].text += "fl";
break;
case 0x0e:
currentlyDrawnPage->textBoxList[currentlyDrawnPage->textBoxList.size()-1].text += "ffi";
break;
case 0x0f:
currentlyDrawnPage->textBoxList[currentlyDrawnPage->textBoxList.size()-1].text += "ffl";
break;
case 0x7b:
currentlyDrawnPage->textBoxList[currentlyDrawnPage->textBoxList.size()-1].text += "-";
break;
case 0x7c:
currentlyDrawnPage->textBoxList[currentlyDrawnPage->textBoxList.size()-1].text += "---";
break;
case 0x7d:
currentlyDrawnPage->textBoxList[currentlyDrawnPage->textBoxList.size()-1].text += "\"";
break;
case 0x7e:
currentlyDrawnPage->textBoxList[currentlyDrawnPage->textBoxList.size()-1].text += "~";
break;
case 0x7f:
currentlyDrawnPage->textBoxList[currentlyDrawnPage->textBoxList.size()-1].text += "@@"; // @@@ check!
break;
default:
if ((ch >= 0x21) && (ch <= 0x7a))
currentlyDrawnPage->textBoxList[currentlyDrawnPage->textBoxList.size()-1].text += TQChar(ch);
else
currentlyDrawnPage->textBoxList[currentlyDrawnPage->textBoxList.size()-1].text += "?";
break;
}
if (cmd == PUT1)
currinf.data.dvi_h = dvi_h_sav;
else
currinf.data.dvi_h += (int)(currinf.fontp->scaled_size_in_DVI_units * dviFile->getCmPerDVIunit() *
(1200.0 / 2.54)/16.0 * g->dvi_advance_in_units_of_design_size_by_2e20 + 0.5);
word_boundary_encountered = false;
line_boundary_encountered = false;
}
void dviRenderer::set_empty_char(unsigned int, unsigned int)
{
return;
}
void dviRenderer::set_vf_char(unsigned int cmd, unsigned int ch)
{
#ifdef DEBUG_RENDER
kdDebug(4300) << "dviRenderer::set_vf_char( cmd=" << cmd << ", ch=" << ch << " )" << endl;
#endif
static unsigned char c;
macro *m = &currinf.fontp->macrotable[ch];
if (m->pos == NULL) {
kdError(4300) << "Character " << ch << " not defined in font " << currinf.fontp->fontname << endl;
m->pos = m->end = &c;
return;
}
long dvi_h_sav = currinf.data.dvi_h;
struct drawinf oldinfo = currinf;
currinf.data.w = 0;
currinf.data.x = 0;
currinf.data.y = 0;
currinf.data.z = 0;
currinf.fonttable = &(currinf.fontp->vf_table);
currinf._virtual = currinf.fontp;
TQ_UINT8 *command_ptr_sav = command_pointer;
TQ_UINT8 *end_ptr_sav = end_pointer;
command_pointer = m->pos;
end_pointer = m->end;
draw_part(currinf.fontp->scaled_size_in_DVI_units*(dviFile->getCmPerDVIunit() * 1200.0 / 2.54)/16.0, true);
command_pointer = command_ptr_sav;
end_pointer = end_ptr_sav;
currinf = oldinfo;
if (cmd == PUT1)
currinf.data.dvi_h = dvi_h_sav;
else
currinf.data.dvi_h += (int)(currinf.fontp->scaled_size_in_DVI_units * dviFile->getCmPerDVIunit() *
(1200.0 / 2.54)/16.0 * m->dvi_advance_in_units_of_design_size_by_2e20 + 0.5);
}
void dviRenderer::set_no_char(unsigned int cmd, unsigned int ch)
{
#ifdef DEBUG_RENDER
kdDebug(4300) << "dviRenderer::set_no_char( cmd=" << cmd << ", ch =" << ch << " )" << endl;
#endif
if (currinf._virtual) {
currinf.fontp = currinf._virtual->first_font;
if (currinf.fontp != NULL) {
currinf.set_char_p = currinf.fontp->set_char_p;
(this->*currinf.set_char_p)(cmd, ch);
return;
}
}
errorMsg = i18n("The DVI code set a character of an unknown font.");
return;
}
void dviRenderer::draw_part(double current_dimconv, bool is_vfmacro)
{
#ifdef DEBUG_RENDER
kdDebug(4300) << "draw_part" << endl;
#endif
TQ_INT32 RRtmp=0, WWtmp=0, XXtmp=0, YYtmp=0, ZZtmp=0;
TQ_UINT8 ch;
currinf.fontp = NULL;
currinf.set_char_p = &dviRenderer::set_no_char;
for (;;) {
ch = readUINT8();
if (ch <= (unsigned char) (SETCHAR0 + 127)) {
(this->*currinf.set_char_p)(ch, ch);
} else
if (FNTNUM0 <= ch && ch <= (unsigned char) (FNTNUM0 + 63)) {
currinf.fontp = currinf.fonttable->tqfind(ch - FNTNUM0);
if (currinf.fontp == NULL) {
errorMsg = i18n("The DVI code referred to font #%1, which was not previously defined.").tqarg(ch - FNTNUM0);
return;
}
currinf.set_char_p = currinf.fontp->set_char_p;
} else {
TQ_INT32 a, b;
switch (ch) {
case SET1:
case PUT1:
(this->*currinf.set_char_p)(ch, readUINT8());
break;
case SETRULE:
if (is_vfmacro == false) {
word_boundary_encountered = true;
line_boundary_encountered = true;
}
/* Be careful, dvicopy outputs rules with height =
0x80000000. We don't want any SIGFPE here. */
a = readUINT32();
b = readUINT32();
b = ((long) (b * current_dimconv));
if (a > 0 && b > 0) {
int h = ((int) ROUNDUP(((long) (a * current_dimconv)), shrinkfactor * 65536));
int w = ((int) ROUNDUP(b, shrinkfactor * 65536));
if (colorStack.isEmpty())
foreGroundPainter->fillRect( ((int) ((currinf.data.dvi_h) / (shrinkfactor * 65536))),
currinf.data.pxl_v - h + 1, w?w:1, h?h:1, globalColor );
else
foreGroundPainter->fillRect( ((int) ((currinf.data.dvi_h) / (shrinkfactor * 65536))),
currinf.data.pxl_v - h + 1, w?w:1, h?h:1, colorStack.top() );
}
currinf.data.dvi_h += b;
break;
case PUTRULE:
if (is_vfmacro == false) {
word_boundary_encountered = true;
line_boundary_encountered = true;
}
a = readUINT32();
b = readUINT32();
a = ((long) (a * current_dimconv));
b = ((long) (b * current_dimconv));
if (a > 0 && b > 0) {
int h = ((int) ROUNDUP(a, shrinkfactor * 65536));
int w = ((int) ROUNDUP(b, shrinkfactor * 65536));
if (colorStack.isEmpty())
foreGroundPainter->fillRect( ((int) ((currinf.data.dvi_h) / (shrinkfactor * 65536))),
currinf.data.pxl_v - h + 1, w?w:1, h?h:1, globalColor );
else
foreGroundPainter->fillRect( ((int) ((currinf.data.dvi_h) / (shrinkfactor * 65536))),
currinf.data.pxl_v - h + 1, w?w:1, h?h:1, colorStack.top() );
}
break;
case NOP:
break;
case BOP:
if (is_vfmacro == false) {
word_boundary_encountered = true;
line_boundary_encountered = true;
}
command_pointer += 11 * 4;
currinf.data.dvi_h = 1200 << 16; // Reminder: DVI-coordinates start at (1",1") from top of page
currinf.data.dvi_v = 1200;
currinf.data.pxl_v = int(currinf.data.dvi_v/shrinkfactor);
currinf.data.w = currinf.data.x = currinf.data.y = currinf.data.z = 0;
break;
case EOP:
// Check if we are just at the end of a virtual font macro.
if (is_vfmacro == false) {
// This is really the end of a page, and not just the end
// of a macro. Mark the end of the current word.
word_boundary_encountered = true;
line_boundary_encountered = true;
// Sanity check for the dvi-file: The DVI-standard asserts
// that at the end of a page, the stack should always be
// empty.
if (!stack.isEmpty()) {
kdDebug(4300) << "DRAW: The stack was not empty when the EOP command was encountered." << endl;
errorMsg = i18n("The stack was not empty when the EOP command was encountered.");
return;
}
}
return;
case PUSH:
stack.push(currinf.data);
break;
case POP:
if (stack.isEmpty()) {
errorMsg = i18n("The stack was empty when a POP command was encountered.");
return;
} else
currinf.data = stack.pop();
word_boundary_encountered = true;
line_boundary_encountered = true;
break;
case RIGHT1:
case RIGHT2:
case RIGHT3:
case RIGHT4:
RRtmp = readINT(ch - RIGHT1 + 1);
// A horizontal motion in the range 4 * font space [f] < h <
// font space [f] will be treated as a kern that is not
// indicated in the printouts that DVItype produces between
// brackets. We allow a larger space in the negative
// direction than in the positive one, because TEX makes
// comparatively large backspaces when it positions
// accents. (comments stolen from the source of dvitype)
if ((is_vfmacro == false) &&
(currinf.fontp != 0) &&
((RRtmp >= currinf.fontp->scaled_size_in_DVI_units/6) || (RRtmp <= -4*(currinf.fontp->scaled_size_in_DVI_units/6))) &&
(currentlyDrawnPage->textBoxList.size() > 0))
currentlyDrawnPage->textBoxList[currentlyDrawnPage->textBoxList.size()-1].text += ' ';
currinf.data.dvi_h += ((long) (RRtmp * current_dimconv));
break;
case W1:
case W2:
case W3:
case W4:
WWtmp = readINT(ch - W0);
currinf.data.w = ((long) (WWtmp * current_dimconv));
case W0:
if ((is_vfmacro == false) &&
(currinf.fontp != 0) &&
((WWtmp >= currinf.fontp->scaled_size_in_DVI_units/6) || (WWtmp <= -4*(currinf.fontp->scaled_size_in_DVI_units/6))) &&
(currentlyDrawnPage->textBoxList.size() > 0) )
currentlyDrawnPage->textBoxList[currentlyDrawnPage->textBoxList.size()-1].text += ' ';
currinf.data.dvi_h += currinf.data.w;
break;
case X1:
case X2:
case X3:
case X4:
XXtmp = readINT(ch - X0);
currinf.data.x = ((long) (XXtmp * current_dimconv));
case X0:
if ((is_vfmacro == false) &&
(currinf.fontp != 0) &&
((XXtmp >= currinf.fontp->scaled_size_in_DVI_units/6) || (XXtmp <= -4*(currinf.fontp->scaled_size_in_DVI_units/6))) &&
(currentlyDrawnPage->textBoxList.size() > 0))
currentlyDrawnPage->textBoxList[currentlyDrawnPage->textBoxList.size()-1].text += ' ';
currinf.data.dvi_h += currinf.data.x;
break;
case DOWN1:
case DOWN2:
case DOWN3:
case DOWN4:
{
TQ_INT32 DDtmp = readINT(ch - DOWN1 + 1);
if ((is_vfmacro == false) &&
(currinf.fontp != 0) &&
(abs(DDtmp) >= 5*(currinf.fontp->scaled_size_in_DVI_units/6)) &&
(currentlyDrawnPage->textBoxList.size() > 0)) {
word_boundary_encountered = true;
line_boundary_encountered = true;
if (abs(DDtmp) >= 10*(currinf.fontp->scaled_size_in_DVI_units/6))
currentlyDrawnPage->textBoxList[currentlyDrawnPage->textBoxList.size()-1].text += '\n';
}
currinf.data.dvi_v += ((long) (DDtmp * current_dimconv))/65536;
currinf.data.pxl_v = int(currinf.data.dvi_v/shrinkfactor);
}
break;
case Y1:
case Y2:
case Y3:
case Y4:
YYtmp = readINT(ch - Y0);
currinf.data.y = ((long) (YYtmp * current_dimconv));
case Y0:
if ((is_vfmacro == false) &&
(currinf.fontp != 0) &&
(abs(YYtmp) >= 5*(currinf.fontp->scaled_size_in_DVI_units/6)) &&
(currentlyDrawnPage->textBoxList.size() > 0)) {
word_boundary_encountered = true;
line_boundary_encountered = true;
if (abs(YYtmp) >= 10*(currinf.fontp->scaled_size_in_DVI_units/6))
currentlyDrawnPage->textBoxList[currentlyDrawnPage->textBoxList.size()-1].text += '\n';
}
currinf.data.dvi_v += currinf.data.y/65536;
currinf.data.pxl_v = int(currinf.data.dvi_v/shrinkfactor);
break;
case Z1:
case Z2:
case Z3:
case Z4:
ZZtmp = readINT(ch - Z0);
currinf.data.z = ((long) (ZZtmp * current_dimconv));
case Z0:
if ((is_vfmacro == false) &&
(currinf.fontp != 0) &&
(abs(ZZtmp) >= 5*(currinf.fontp->scaled_size_in_DVI_units/6)) &&
(currentlyDrawnPage->textBoxList.size() > 0)) {
word_boundary_encountered = true;
line_boundary_encountered = true;
if (abs(ZZtmp) >= 10*(currinf.fontp->scaled_size_in_DVI_units/6))
currentlyDrawnPage->textBoxList[currentlyDrawnPage->textBoxList.size()-1].text += '\n';
}
currinf.data.dvi_v += currinf.data.z/65536;
currinf.data.pxl_v = int(currinf.data.dvi_v/shrinkfactor);
break;
case FNT1:
case FNT2:
case FNT3:
currinf.fontp = currinf.fonttable->tqfind(readUINT(ch - FNT1 + 1));
if (currinf.fontp == NULL) {
errorMsg = i18n("The DVI code referred to a font which was not previously defined.");
return;
}
currinf.set_char_p = currinf.fontp->set_char_p;
break;
case FNT4:
currinf.fontp = currinf.fonttable->tqfind(readINT(ch - FNT1 + 1));
if (currinf.fontp == NULL) {
errorMsg = i18n("The DVI code referred to a font which was not previously defined.");
return;
}
currinf.set_char_p = currinf.fontp->set_char_p;
break;
case XXX1:
case XXX2:
case XXX3:
case XXX4:
if (is_vfmacro == false) {
word_boundary_encountered = true;
line_boundary_encountered = true;
}
a = readUINT(ch - XXX1 + 1);
if (a > 0) {
char *cmd = new char[a+1];
strncpy(cmd, (char *)command_pointer, a);
command_pointer += a;
cmd[a] = '\0';
applicationDoSpecial(cmd);
delete [] cmd;
}
break;
case FNTDEF1:
case FNTDEF2:
case FNTDEF3:
case FNTDEF4:
command_pointer += 12 + ch - FNTDEF1 + 1;
{
TQ_UINT8 tempa = readUINT8();
TQ_UINT8 tempb = readUINT8();
command_pointer += tempa + tempb;
}
break;
case PRE:
case POST:
case POSTPOST:
errorMsg = i18n("An illegal command was encountered.");
return;
break;
default:
errorMsg = i18n("The unknown op-code %1 was encountered.").tqarg(ch);
return;
} /* end switch*/
} /* end else (ch not a SETCHAR or FNTNUM) */
} /* end for */
}
void dviRenderer::draw_page()
{
// Reset a couple of variables
HTML_href = 0;
source_href = 0;
penWidth_in_mInch = 0.0;
// Calling resize() here rather than clear() means that the memory
// taken up by the vector is not freed. This is faster than
// constantly allocating/freeing memory.
currentlyDrawnPage->textBoxList.resize(0);
RenderedDviPagePixmap* currentDVIPage = dynamic_cast<RenderedDviPagePixmap*>(currentlyDrawnPage);
if (currentDVIPage)
{
currentDVIPage->sourceHyperLinkList.resize(0);
}
#ifdef PERFORMANCE_MEASUREMENT
// If this is the first time a page is drawn, take the time that is
// elapsed till the kdvi_multipage was constructed, and print
// it. Set the flag so that is message will not be printed again.
if (performanceFlag == 0) {
kdDebug(4300) << "Time elapsed till the first page is drawn: " << performanceTimer.restart() << "ms" << endl;
performanceFlag = 1;
}
#endif
#ifdef DEBUG_RENDER
kdDebug(4300) <<"draw_page" << endl;
#endif
if (!accessibilityBackground)
{
foreGroundPainter->fillRect( foreGroundPainter->viewport(), PS_interface->getBackgroundColor(current_page) );
}
else
{
// In accessiblity mode use the custom background color
foreGroundPainter->fillRect( foreGroundPainter->viewport(), accessibilityBackgroundColor );
}
// Render the PostScript background, if there is one.
if (_postscript)
{
// In accessiblity mode use the custom background color
if (accessibilityBackground)
{
// Flag permanent is set to false because otherwise we would not be able to restore
// the original background color.
PS_interface->setBackgroundColor(current_page, accessibilityBackgroundColor, false);
}
else
PS_interface->restoreBackgroundColor(current_page);
PS_interface->graphics(current_page, resolutionInDPI, dviFile->getMagnification(), foreGroundPainter);
}
// Now really write the text
if (dviFile->page_offset.isEmpty() == true)
return;
if (current_page < dviFile->total_pages) {
command_pointer = dviFile->dvi_Data() + dviFile->page_offset[current_page];
end_pointer = dviFile->dvi_Data() + dviFile->page_offset[current_page+1];
} else
command_pointer = end_pointer = 0;
memset((char *) &currinf.data, 0, sizeof(currinf.data));
currinf.fonttable = &(dviFile->tn_table);
currinf._virtual = 0;
double fontPixelPerDVIunit = dviFile->getCmPerDVIunit() * 1200.0/2.54;
draw_part(65536.0*fontPixelPerDVIunit, false);
if (HTML_href != 0) {
delete HTML_href;
HTML_href = 0;
}
if (source_href != 0) {
delete source_href;
source_href = 0;
}
}
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