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Lu Wang 2012-08-05 02:03:53 +08:00
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CMakeLists.txt Normal file
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project(pdftohtmlEX)
cmake_minimum_required(VERSION 2.6.0 FATAL_ERROR)
find_package(PkgConfig)
pkg_check_modules(POPPLER REQUIRED poppler)
include_directories(${POPPLER_INCLUDE_DIRS})
link_directories ( ${POPPLER_LIBRARY_DIRS} )
find_package(Boost REQUIRED COMPONENTS program_options)
include_directories(${Boost_INCLUDE_DIRS})
link_directories ( ${Boost_LIBRARY_DIRS} )
set(PDFTOHTMLEX_VERSION "0.1")
SET(EXECUTABLE_OUTPUT_PATH ${PROJECT_BINARY_DIR}/bin)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wunused-function")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++0x")
#set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -O2")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -ggdb")
add_executable(pdftohtmlEX src/pdftohtmlEX.cc src/HTMLRenderer.cc src/HTMLRenderer.h)
target_link_libraries(pdftohtmlEX poppler boost_program_options)

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LICENSE Normal file
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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/>.
Also add information on how to contact you by electronic and paper mail.
If the program does terminal interaction, make it output a short
notice like this when it starts in an interactive mode:
<program> Copyright (C) <year> <name of author>
This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, your program's commands
might be different; for a GUI interface, you would use an "about box".
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<http://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<http://www.gnu.org/philosophy/why-not-lgpl.html>.

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pdf2html**EX**
=============================
Introduction
-----------------------------
Traditional pdf -> html conversion tools are more likely pdf -> text tools.
For those who are not satisfied with them, this might be the right one for you.
pdf2htmlEX utilizes latest technologies of html/css, aims to provide an accuracy rendering,
while keeping optimized for Web display.
pdf2htmlEX is optimized for recent versions of moderm web browsers such as Mozilla Firefox & Google Chrome.
Features
----------------------------
* Font embedding
* Proper styling
* Optimization for Web
* Transformation (Experimental)
Not supported yet
----------------------------
* Non-text object
* Color
* CJK
Dependency
----------------------------
* libpoppler with xpdf header >= 0.20.2
* fontforge (we will compile with libfontforge later)
HOW TO COMPILE
----------------------------
cmake . && make
HOW TO USE
----------------------------
bin/pdf2htmlEX /path/to/sample.pdf
LICENSE
----------------------------
GPLv3
We would like to acknowledge the following projects that have been consulted while writing this program:
* pdftops & pdftohtml from poppler
* PDF.js
* Crocodoc
* Google Doc
AUTHORS
----------------------------
Lu Wang <coolwanglu@gmail.com>
Hongliang Tian <tatetian@gmail.com>

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#!/bin/bash
# Get directory of the script
SOURCE="${BASH_SOURCE[0]}"
while [ -h "$SOURCE" ] ; do SOURCE="$(readlink "$SOURCE")"; done
SCRIPT_DIR="$( cd -P "$( dirname "$SOURCE" )" && pwd )"/
# Execute
${SCRIPT_DIR}/pdftohtmlEX $*
for f in *.pfa; do
fontforge -script "${SCRIPT_DIR}/pfa2otf.pe" $f
rm $f
done

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Open($1);
Generate($1:r+".otf");

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/*
* HTMLRenderer.cc
*
* Copyright (C) 2011 by Hongliang TIAN(tatetian@gmail.com)
* Copyright (C) 2012 by Lu Wang coolwanglu<at>gmail.com
*/
/*
* TODO
* color
* transformation
* remove line break for divs in the same line
*
* updatetextmat, position etc.
*
* font base64 embedding
* custom css
*/
#include <cmath>
#include <cassert>
#include <fstream>
#include <algorithm>
#include <boost/format.hpp>
#include <boost/algorithm/string.hpp>
#include <GfxFont.h>
#include <UTF8.h>
#include <fofi/FoFiType1C.h>
#include <fofi/FoFiTrueType.h>
#include "HTMLRenderer.h"
/*
* CSS classes
*
* p - Page
* t - Transform
* l - Line
*
*
* Reusable CSS classes
*
* f<hex> - Font (also for font names)
* s<hex> - font Size
* w<hex> - White space
* t<hex> - Transform matrix (for both CTM and Text Matrix)
*/
const char * HTML_HEAD = "<!DOCTYPE html>\n\
<html><head>\
<meta charset=\"utf-8\">\
<style type=\"text/css\">\
#pdf-main {\
font-family: sans-serif;\
position:absolute;\
top:0;\
left:0;\
bottom:0;\
right:0;\
overflow:auto;\
background-color:grey;\
}\
#pdf-main .p {\
position:relative;\
margin:13px auto;\
background-color:white;\
overflow:hidden;\
display:none;\
}\
.p .t {\
position:absolute;\
top:0;\
left:0;\
bottom:0;\
right:0;\
transform-origin:0% 100%;\
-ms-transform-origin:0% 100%;\
-moz-transform-origin:0% 100%;\
-webkit-transform-origin:0% 100%;\
-o-transform-origin:0% 100%;\
}\
.t .l {\
position:absolute; \
white-space:pre;\
transform-origin:0% 100%;\
-ms-transform-origin:0% 100%;\
-moz-transform-origin:0% 100%;\
-webkit-transform-origin:0% 100%;\
-o-transform-origin:0% 100%;\
}\
.l > span{\
display:inline-block;\
}\
::selection{\
background: rgba(168,209,255,0.5);\
}\
::-moz-selection{\
background: rgba(168,209,255,0.5);\
}\
</style><link rel=\"stylesheet\" type=\"text/css\" href=\"all.css\" />\
<script type=\"text/javascript\">\
function show_pages()\
{\
var pages = document.getElementById('pdf-main').childNodes;\
var idx = 0;\
var f = function(){\
if (idx < pages.length) {\
pages[idx].style.display='block';\
++idx;\
setTimeout(f,100);\
}\
};\
f();\
};\
</script>\
</head><body onload=\"show_pages();\"><div id=\"pdf-main\">";
const char * HTML_TAIL = "</div></body></html>";
const std::map<string, string> BASE_14_FONT_CSS_FONT_MAP({\
{ "Courier", "Courier,monospace" },\
{ "Helvetica", "Helvetica,Arial,\"Nimbus Sans L\",sans-serif" },\
{ "Times", "Times,\"Time New Roman\",\"Nimbus Roman No9 L\",serif" },\
{ "Symbol", "Symbol" },\
{ "ZapfDingbats", "ZapfDingbats" },\
});
TextString::TextString(GfxState *state)
:unicodes()
,x(state->getCurX()), y(state->getCurY())
,width(0),height(0)
,state(state)
{ }
TextString::~TextString()
{
delete state;
state = nullptr;
}
void TextString::addChar(GfxState *state, double x, double y,
double dx, double dy, Unicode u)
{
if (0 < u && u != 9 && u < 32) // skip non-printable not-tab character
return;
/*
if (unicodes.empty())
{
this->x = x;
this->y = y;
}
*/
unicodes.push_back(u);
width += dx;
height += dy;
}
HTMLRenderer::HTMLRenderer(const Param * param)
:cur_string(nullptr), cur_line(nullptr)
,cur_line_x_offset(0)
,cur_fs_id(0), cur_fn_id(0)
,html_fout(param->output_filename.c_str(), ofstream::binary), allcss_fout("all.css")
,param(param)
{
// install default font & size
install_font(nullptr);
install_font_size(0);
html_fout << HTML_HEAD;
if(param->readable) html_fout << endl;
for(int i = 0; i < 6; ++i)
ctm[i] = text_mat[i] = 0.0;
ctm[0] = text_mat[0] = ctm[3] = text_mat[3] = 1.0;
}
HTMLRenderer::~HTMLRenderer()
{
html_fout << HTML_TAIL;
if(param->readable) html_fout << endl;
}
void HTMLRenderer::process(PDFDoc *doc)
{
xref = doc->getXRef();
for(int i = param->first_page; i <= param->last_page ; ++i) {
doc->displayPage(this, i, param->h_dpi, param->v_dpi,
0, true, false, false,
nullptr, nullptr, nullptr, nullptr);
}
}
void HTMLRenderer::startPage(int pageNum, GfxState *state)
{
this->pageNum = pageNum;
this->pageWidth=static_cast<int>(state->getPageWidth());
this->pageHeight=static_cast<int>(state->getPageHeight());
assert(cur_line == nullptr);
html_fout << boost::format("<div id=\"page-%3%\" class=\"p\" style=\"width:%1%px;height:%2%px;") % pageWidth % pageHeight % pageNum;
#if 0
// TODO:background
html_fout << boost::format("background-image:url(p%3%.png);background-position:0 0;background-size:%1%px %2%px;background-repeat:no-repeat;") % pageWidth % pageHeight % pageNum;
#endif
html_fout << "\">";
if(param->readable) html_fout << endl;
// default CTM
html_fout << "<div class=\"t\">";
if(param->readable) html_fout << endl;
}
void HTMLRenderer::endPage() {
close_cur_line();
// close CTM
html_fout << "</div>";
if(param->readable) html_fout << endl;
// close page
html_fout << "</div>";
if(param->readable) html_fout << endl;
}
void HTMLRenderer::convert_transform_matrix(double * tm)
{
tm[1] = -tm[1];
tm[2] = -tm[2];
tm[5] = -tm[5];
}
bool HTMLRenderer::at_same_line(const TextString * ts1, const TextString * ts2) const
{
if(!(std::abs(ts1->getY() - ts2->getY()) < param->v_eps))
return false;
GfxState * s1 = ts1->getState();
GfxState * s2 = ts2->getState();
if(!(_equal(s1->getCharSpace(), s2->getCharSpace())
&& _equal(s1->getWordSpace(), s2->getWordSpace())
&& _equal(s1->getHorizScaling(), s2->getHorizScaling())))
return false;
/*
no need for this, as we track TM now
if(!(_tm_equal(s1->getCTM(), s2->getCTM()) && _tm_equal(s1->getTextMat(), s2->getTextMat())))
return false;
*/
return true;
}
void HTMLRenderer::close_cur_line()
{
if(cur_line != nullptr)
{
html_fout << "</div>";
if(param->readable) html_fout << endl;
delete cur_line;
cur_line = nullptr;
cur_line_x_offset = 0;
}
}
void HTMLRenderer::outputTextString(TextString * str)
{
for (auto u : str->getUnicodes())
{
switch(u)
{
case '&':
html_fout << "&amp;";
break;
case '\"':
html_fout << "&quot;";
break;
case '\'':
html_fout << "&apos;";
break;
case '<':
html_fout << "&lt;";
break;
case '>':
html_fout << "&gt;";
break;
default:
{
char buf[4];
auto n = mapUTF8(u, buf, 4);
if(n > 0)
html_fout.write(buf, n);
}
}
}
}
void HTMLRenderer::updateCTM(GfxState * state, double m11, double m12, double m21, double m22, double m31, double m32)
{
double new_ctm[6];
memcpy(new_ctm, state->getCTM(), sizeof(new_ctm));
convert_transform_matrix(new_ctm);
if(!_tm_equal(ctm, new_ctm))
{
close_cur_line();
memcpy(ctm, new_ctm, sizeof(ctm));
// close old CTM div and create a new one
html_fout << "</div>";
if(param->readable) html_fout << endl;
html_fout << boost::format("<div class=\"t t%|1$x|\">") % install_transform_matrix(ctm);
if(param->readable) html_fout << endl;
}
}
void HTMLRenderer::updateFont(GfxState *state) {
long long new_fn_id = install_font(state->getFont());
long long new_fs_id = install_font_size(state->getFontSize());
if(!((new_fn_id == cur_fn_id) && (new_fs_id == cur_fs_id)))
{
close_cur_line();
cur_fn_id = new_fn_id;
cur_fs_id = new_fs_id;
}
}
void HTMLRenderer::updateTextMat(GfxState * state)
{
double new_text_mat[6];
memcpy(new_text_mat, state->getTextMat(), sizeof(new_text_mat));
convert_transform_matrix(new_text_mat);
if(!_tm_equal(text_mat, new_text_mat))
{
close_cur_line();
memcpy(text_mat, new_text_mat, sizeof(text_mat));
//debug
//TODO: why
text_mat[4] = text_mat[5] = 0.0;
}
}
void HTMLRenderer::beginString(GfxState *state, GooString *s) {
// TODO: remove this
GfxState * new_state = state->copy(gTrue);
cur_string = new TextString(new_state);
}
void HTMLRenderer::endString(GfxState *state) {
if (cur_string->getSize() == 0) {
delete cur_string ;
return;
}
// try to merge with last line
if(cur_line != nullptr)
{
if(at_same_line(cur_line, cur_string))
{
double x1 = cur_line->getX() + cur_line->getWidth();
double x2 = cur_string->getX();
double target = x2-x1-cur_line_x_offset;
if(target > -param->h_eps)
{
if(target > param->h_eps)
{
double w;
auto wid = install_whitespace(target, w);
cur_line_x_offset = w-target;
html_fout << boost::format("<span class=\"w%|1$x|\"> </span>") % wid;
}
else
{
cur_line_x_offset = -target;
}
outputTextString(cur_string);
delete cur_line;
cur_line = cur_string;
cur_string = nullptr;
return;
}
}
}
close_cur_line();
// TODO: optimize text matrix search/install
html_fout << boost::format("<div class=\"l f%|1$x| s%|2$x| t%|3$x|\" style=\"") % cur_fn_id % cur_fs_id % install_transform_matrix(text_mat)
<< "top:" << (pageHeight - cur_string->getY()) << "px;"
<< "left:" << cur_string->getX() << "px;"
// << "height:" << cur_string->getHeight() << "px;"
;
// letter & word spacing
GfxState * cur_state = cur_string -> getState();
if(_is_positive(cur_state->getCharSpace()))
html_fout << "letter-spacing:" << cur_state->getCharSpace() << "px;";
if(_is_positive(cur_state->getWordSpace()))
html_fout << "word-spacing:" << cur_state->getWordSpace() << "px;";
//debug
{
html_fout << "\"";
double x,y;
cur_state->transform(cur_state->getCurX(), cur_state->getCurY(), &x, &y);
html_fout << boost::format(" data-x=\"%1%\" data-y=\"%2%")%x%y;
}
html_fout << "\">";
outputTextString(cur_string);
cur_line = cur_string;
cur_string = nullptr;
cur_line_x_offset = 0;
// HERE
//debug
// close_cur_line();
}
void HTMLRenderer::drawChar(GfxState *state, double x, double y,
double dx, double dy,
double originX, double originY,
CharCode code, int /*nBytes*/, Unicode *u, int uLen)
{
double x1, y1, w1, h1;
x1 = x;
y1 = y;
// if it is hidden, then return
if ((state->getRender() & 3) == 3)
return ;
// TODO:
// not on the same line
if (!_equal(cur_string->getY(), y1)){
std::cerr << "TODO: line break in a string" << std::endl;
}
w1 = dx - state->getCharSpace() * state->getHorizScaling(),
h1 = dy;
if (uLen != 0) {
w1 /= uLen;
h1 /= uLen;
}
for (int i = 0; i < uLen; ++i) {
cur_string->addChar(state, x1 + i*w1, y1 + i*h1, w1, h1, u[i]);
}
}
// TODO
void HTMLRenderer::drawString(GfxState * state, GooString * s)
{
auto font = state->getFont();
if(font->getWMode())
std::cerr << "TODO: writing mode" << std::endl;
// stolen from poppler
double dx = 0;
double dy = 0;
double dx2, dy2;
double ox, oy;
char *p = s->getCString();
int len = s->getLength();
int nChars = 0;
int nSpaces = 0;
int uLen;
CharCode code;
Unicode *u = nullptr;
while (len > 0) {
auto n = font->getNextChar(p, len, &code, &u, &uLen, &dx2, &dy2, &ox, &oy);
dx += dx2;
dy += dy2;
if (n == 1 && *p == ' ') {
++nSpaces;
}
++nChars;
p += n;
len -= n;
}
dx = dx * state->getFontSize()
+ nChars * state->getCharSpace()
+ nSpaces * state->getWordSpace();
dx *= state->getHorizScaling();
dy *= state->getFontSize();
}
// The font installation code is stolen from PSOutputDev.cc in poppler
long long HTMLRenderer::install_font(GfxFont * font)
{
assert(sizeof(long long) == 2*sizeof(int));
long long fn_id = (font == nullptr) ? 0 : *reinterpret_cast<long long*>(font->getID());
auto iter = font_name_map.find(fn_id);
if(iter != font_name_map.end())
return iter->second.fn_id;
long long new_fn_id = font_name_map.size();
font_name_map.insert(std::make_pair(fn_id, FontInfo({new_fn_id})));
if(font == nullptr)
{
export_remote_default_font(new_fn_id);
return new_fn_id;
}
string new_fn = (boost::format("f%|1$x|") % new_fn_id).str();
if(font->getType() == fontType3) {
std::cerr << "TODO: Type 3 font unsupported" << std::endl;
export_remote_default_font(new_fn_id);
return new_fn_id;
}
auto * font_loc = font->locateFont(xref, gTrue);
if(font_loc != nullptr)
{
switch(font_loc -> locType)
{
case gfxFontLocEmbedded:
switch(font_loc -> fontType)
{
case fontType1:
install_embedded_type1_font(&font_loc->embFontID, new_fn_id);
break;
case fontType1C:
install_embedded_type1c_font(font, new_fn_id);
break;
case fontType1COT:
install_embedded_opentypet1c_font(font, new_fn_id);
break;
case fontTrueType:
case fontTrueTypeOT:
install_embedded_truetype_font(font, new_fn_id);
break;
default:
std::cerr << "TODO: unsuppported embedded font type" << std::endl;
export_remote_default_font(new_fn_id);
break;
}
break;
case gfxFontLocExternal:
std::cerr << "TODO: external font" << std::endl;
export_remote_default_font(new_fn_id);
break;
case gfxFontLocResident:
install_base_font(font, font_loc, new_fn_id);
break;
default:
std::cerr << "TODO: other font loc" << std::endl;
export_remote_default_font(new_fn_id);
break;
}
delete font_loc;
}
return new_fn_id;
}
void HTMLRenderer::install_embedded_type1_font (Ref * id, long long fn_id)
{
Object ref_obj, str_obj, ol1, ol2, ol3;
Dict * dict;
int l1, l2, l3;
int c;
bool is_bin = false;
int buf[4];
ofstream tmpf((boost::format("f%|1$x|.pfa")%fn_id).str().c_str(), ofstream::binary);
auto output_char = [&tmpf](int c)->void {
char tmp = (char)(c & 0xff);
tmpf.write(&tmp, 1);
};
ref_obj.initRef(id->num, id->gen);
ref_obj.fetch(xref, &str_obj);
ref_obj.free();
if(!str_obj.isStream())
{
std::cerr << "Embedded font is not a stream" << std::endl;
goto err;
}
dict = str_obj.streamGetDict();
if(dict == nullptr)
{
std::cerr << "No dict in the embedded font" << std::endl;
goto err;
}
dict->lookup("Length1", &ol1);
dict->lookup("Length2", &ol2);
dict->lookup("Length3", &ol3);
if(!(ol1.isInt() && ol2.isInt() && ol3.isInt()))
{
std::cerr << "Length 1&2&3 are not all integers" << std::endl;
ol1.free();
ol2.free();
ol3.free();
goto err;
}
l1 = ol1.getInt();
l2 = ol2.getInt();
l3 = ol3.getInt();
ol1.free();
ol2.free();
ol3.free();
str_obj.streamReset();
for(int i = 0; i < l1; ++i)
{
if((c = str_obj.streamGetChar()) == EOF)
break;
output_char(c);
}
if(l2 == 0)
{
std::cerr << "Bad Length2" << std::endl;
goto err;
}
{
int i;
for(i = 0; i < 4; ++i)
{
int j = buf[i] = str_obj.streamGetChar();
if(buf[i] == EOF)
{
std::cerr << "Embedded font stream is too short" << std::endl;
goto err;
}
if(!((j>='0'&&j<='9') || (j>='a'&&j<='f') || (j>='A'&&j<='F')))
{
is_bin = true;
++i;
break;
}
}
if(is_bin)
{
static const char hex_char[] = "0123456789ABCDEF";
for(int j = 0; j < i; ++j)
{
output_char(hex_char[(buf[j]>>4)&0xf]);
output_char(hex_char[buf[j]&0xf]);
}
for(; i < l2; ++i)
{
if(i % 32 == 0)
output_char('\n');
int c = str_obj.streamGetChar();
if(c == EOF)
break;
output_char(hex_char[(c>>4)&0xf]);
output_char(hex_char[c&0xf]);
}
if(i % 32 != 0)
output_char('\n');
}
else
{
for(int j = 0; j < i; ++j)
{
output_char(buf[j]);
}
for(;i < l2; ++i)
{
int c = str_obj.streamGetChar();
if(c == EOF)
break;
output_char(c);
}
}
}
if(l3 > 0)
{
int c;
while((c = str_obj.streamGetChar()) != EOF)
output_char(c);
}
else
{
for(int i = 0; i < 8; ++i)
{
for(int j = 0; j < 64; ++j)
output_char('0');
output_char('\n');
}
static const char * CTM = "cleartomark\n";
tmpf.write(CTM, strlen(CTM));
}
export_remote_font(fn_id, "otf");
err:
str_obj.streamClose();
str_obj.free();
}
void HTMLRenderer::output_to_file(void * outf, const char * data, int len)
{
reinterpret_cast<ofstream*>(outf)->write(data, len);
}
void HTMLRenderer::install_embedded_type1c_font (GfxFont * font, long long fn_id)
{
int font_len;
char * font_buf = font->readEmbFontFile(xref, &font_len);
if(font_buf != nullptr)
{
auto * FFT1C = FoFiType1C::make(font_buf, font_len);
if(FFT1C != nullptr)
{
string fn = (boost::format("f%|1$x|")%fn_id).str();
ofstream tmpf((fn+".pfa").c_str(), ofstream::binary);
FFT1C->convertToType1((char*)fn.c_str(), nullptr, true, &output_to_file , &tmpf);
export_remote_font(fn_id, "otf");
delete FFT1C;
}
else
{
std::cerr << "Warning: cannot process type 1c font: " << fn_id << std::endl;
export_remote_default_font(fn_id);
}
gfree(font_buf);
}
}
void HTMLRenderer::install_embedded_opentypet1c_font (GfxFont * font, long long fn_id)
{
install_embedded_truetype_font(font, fn_id);
}
void HTMLRenderer::install_embedded_truetype_font (GfxFont * font, long long fn_id)
{
int font_len;
char * font_buf = font->readEmbFontFile(xref, &font_len);
if(font_buf != nullptr)
{
auto * FFTT = FoFiTrueType::make(font_buf, font_len);
if(FFTT != nullptr)
{
string fn = (boost::format("f%|1$x|")%fn_id).str();
ofstream tmpf((fn+".ttf").c_str(), ofstream::binary);
FFTT->writeTTF(output_to_file, &tmpf, (char*)(fn.c_str()), nullptr);
export_remote_font(fn_id, "ttf");
delete FFTT;
}
else
{
std::cerr << "Warning: cannot process truetype (or opentype t1c) font: " << fn_id << std::endl;
export_remote_default_font(fn_id);
}
gfree(font_buf);
}
}
void HTMLRenderer::install_base_font( GfxFont * font, GfxFontLoc * font_loc, long long fn_id)
{
std::string psname(font_loc->path->getCString());
string basename = psname.substr(0, psname.find('-'));
string cssfont;
auto iter = BASE_14_FONT_CSS_FONT_MAP.find(basename);
if(iter == BASE_14_FONT_CSS_FONT_MAP.end())
{
std::cerr << "PS Font: " << basename << " not found in the base 14 font map" << std::endl;
cssfont = "";
}
else
cssfont = iter->second;
export_local_font(fn_id, font, font_loc, psname, cssfont);
}
long long HTMLRenderer::install_font_size(double font_size)
{
auto iter = font_size_map.lower_bound(font_size - EPS);
if((iter != font_size_map.end()) && (_equal(iter->first, font_size)))
return iter->second;
long long new_fs_id = font_size_map.size();
font_size_map.insert(std::make_pair(font_size, new_fs_id));
export_font_size(new_fs_id, font_size);
return new_fs_id;
}
long long HTMLRenderer::install_whitespace(double ws_width, double & actual_width)
{
auto iter = whitespace_map.lower_bound(ws_width - param->h_eps);
if((iter != whitespace_map.end()) && (std::abs(iter->first - ws_width) < param->h_eps))
{
actual_width = iter->first;
return iter->second;
}
actual_width = ws_width;
long long new_ws_id = whitespace_map.size();
whitespace_map.insert(std::make_pair(ws_width, new_ws_id));
export_whitespace(new_ws_id, ws_width);
return new_ws_id;
}
long long HTMLRenderer::install_transform_matrix(double * tm){
TM m(tm);
auto iter = transform_matrix_map.lower_bound(m);
if(m == (iter->first))
{
return iter->second;
}
long long new_tm_id = transform_matrix_map.size();
transform_matrix_map.insert(std::make_pair(m, new_tm_id));
export_transform_matrix(new_tm_id, tm);
return new_tm_id;
}
void HTMLRenderer::export_remote_font(long long fn_id, const string & suffix)
{
allcss_fout << boost::format("@font-face{font-family:f%|1$x|;src:url(f%|1$x|.%2%);}.f%|1$x|{font-family:f%|1$x|;}") % fn_id % suffix;
if(param->readable) allcss_fout << endl;
}
void HTMLRenderer::export_remote_default_font(long long fn_id)
{
allcss_fout << boost::format(".f%|1$x|{font-family:sans-serif;color:red;}")%fn_id;
if(param->readable) allcss_fout << endl;
}
void HTMLRenderer::export_local_font(long long fn_id, GfxFont * font, GfxFontLoc * font_loc, const string & original_font_name, const string & cssfont)
{
allcss_fout << boost::format(".f%|1$x|{") % fn_id;
allcss_fout << "font-family:" << ((cssfont == "") ? (original_font_name + "," + general_font_family(font)) : cssfont) << ";";
if(font->isBold())
allcss_fout << "font-weight:bold;";
if(boost::algorithm::ifind_first(original_font_name, "oblique"))
allcss_fout << "font-style:oblique;";
else if(font->isItalic())
allcss_fout << "font-style:italic;";
allcss_fout << "}";
if(param->readable) allcss_fout << endl;
}
std::string HTMLRenderer::general_font_family(GfxFont * font)
{
if(font -> isFixedWidth())
return "monospace";
else if (font -> isSerif())
return "serif";
else
return "sans-serif";
}
void HTMLRenderer::export_font_size (long long fs_id, double font_size)
{
allcss_fout << boost::format(".s%|1$x|{font-size:%2%px;}") % fs_id % font_size;
if(param->readable) allcss_fout << endl;
}
void HTMLRenderer::export_whitespace (long long ws_id, double ws_width)
{
allcss_fout << boost::format(".w%|1$x|{width:%2%px;}") % ws_id % ws_width;
if(param->readable) allcss_fout << endl;
}
void HTMLRenderer::export_transform_matrix (long long tm_id, double * tm)
{
// TODO: recognize common matices
allcss_fout << boost::format(".t%|1$x|{") % tm_id;
for(const std::string & prefix : {"", "-ms-", "-moz-", "-webkit-", "-o-"})
{
allcss_fout << prefix << "transform:matrix(";
for(int i = 0; i < 4; ++i)
allcss_fout << tm[i] << ',';
if(prefix == "-moz-")
allcss_fout << boost::format("%1%px,%2%px);") % tm[4] % tm[5];
else
allcss_fout << boost::format("%1%,%2%);") % tm[4] % tm[5];
}
allcss_fout << "}";
if(param->readable) allcss_fout << endl;
}

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/*
* HTMLRenderer.h
*
* Created on: Mar 15, 2011
* Author: tian
*/
#ifndef HTMLRENDERER_H_
#define HTMLRENDERER_H_
#include <algorithm>
#include <fstream>
#include <unordered_map>
#include <map>
#include <vector>
#include <OutputDev.h>
#include <GfxState.h>
#include <CharTypes.h>
#include <Stream.h>
#include <Array.h>
#include <Dict.h>
#include <XRef.h>
#include <Catalog.h>
#include <Page.h>
#include <PDFDoc.h>
#include <goo/gtypes.h>
#include <Object.h>
#include <GfxFont.h>
#include "Param.h"
using namespace std;
static const double EPS = 1e-6;
inline bool _equal(double x, double y) { return std::abs(x-y) < EPS; }
inline bool _is_positive(double x) { return x > EPS; }
inline bool _tm_equal(const double * tm1, const double * tm2)
{
for(int i = 0; i < 6; ++i)
if(!_equal(tm1[i], tm2[i]))
return false;
return true;
}
class TextString
{
public:
TextString(GfxState *state);
~TextString();
// Add a character to the string.
void addChar(GfxState *state, double x, double y,
double dx, double dy,
Unicode u);
double getX() const {return x;}
double getY() const {return y;}
double getWidth() const {return width;}
double getHeight() const {return height;}
GfxState * getState() const { return state; }
const std::vector<Unicode> & getUnicodes() const { return unicodes; }
size_t getSize() const { return unicodes.size(); }
private:
std::vector<Unicode> unicodes;
double x, y;
double width, height;
// TODO:
// remove this, track state change in the converter
GfxState * state;
};
class HTMLRenderer : public OutputDev
{
public:
HTMLRenderer(const Param * param);
virtual ~HTMLRenderer();
void process(PDFDoc * doc);
//---- get info about output device
// Does this device use upside-down coordinates?
// (Upside-down means (0,0) is the top left corner of the page.)
virtual GBool upsideDown() { return gFalse; }
// Does this device use drawChar() or drawString()?
virtual GBool useDrawChar() { return gTrue; }
// Does this device use beginType3Char/endType3Char? Otherwise,
// text in Type 3 fonts will be drawn with drawChar/drawString.
virtual GBool interpretType3Chars() { return gFalse; }
// Does this device need non-text content?
virtual GBool needNonText() { return gFalse; }
//----- initialization and control
virtual GBool checkPageSlice(Page *page, double hDPI, double vDPI,
int rotate, GBool useMediaBox, GBool crop,
int sliceX, int sliceY, int sliceW, int sliceH,
GBool printing, Catalog * catalogA,
GBool (* abortCheckCbk)(void *data) = NULL,
void * abortCheckCbkData = NULL)
{
docPage = page;
catalog = catalogA;
return gTrue;
}
// Start a page.
virtual void startPage(int pageNum, GfxState *state);
// End a page.
virtual void endPage();
//----- update state
virtual void updateCTM(GfxState * state, double m11, double m12, double m21, double m22, double m31, double m32);
virtual void updateFont(GfxState * state);
virtual void updateTextMat(GfxState * state);
//----- text drawing
virtual void beginString(GfxState *state, GooString *s);
virtual void endString(GfxState *state);
virtual void drawChar(GfxState *state, double x, double y,
double dx, double dy,
double originX, double originY,
CharCode code, int nBytes, Unicode *u, int uLen);
virtual void drawString(GfxState * state, GooString * s);
private:
bool at_same_line(const TextString * ts1, const TextString * ts2) const;
// CSS use a different coordinate system from PDF
void convert_transform_matrix(double * tm);
void close_cur_line();
void outputTextString(TextString * str);
// return the mapped font name
long long install_font(GfxFont * font);
static void output_to_file(void * outf, const char * data, int len);
void install_embedded_type1_font (Ref * id, long long fn_id);
void install_embedded_type1c_font (GfxFont * font, long long fn_id);
void install_embedded_opentypet1c_font (GfxFont * font, long long fn_id);
void install_embedded_truetype_font (GfxFont * font, long long fn_id);
void install_base_font(GfxFont * font, GfxFontLoc * font_loc, long long fn_id);
long long install_font_size(double font_size);
long long install_whitespace(double ws_width, double & actual_width);
long long install_transform_matrix(double * tm);
/*
* remote font: to be retrieved from the web server
* local font: to be substituted with a local (client side) font
*/
void export_remote_font(long long fn_id, const string & suffix);
void export_remote_default_font(long long fn_id);
void export_local_font(long long fn_id, GfxFont * font, GfxFontLoc * font_loc, const string & original_font_name, const string & cssfont);
std::string general_font_family(GfxFont * font);
void export_font_size(long long fs_id, double font_size);
void export_whitespace(long long ws_id, double ws_width);
void export_transform_matrix(long long tm_id, double * tm);
Catalog *catalog;
Page *docPage;
// page info
int pageNum ;
int pageWidth ;
int pageHeight ;
// state maintained when processing pdf
// the string being processed
TextString * cur_string;
// the last word of current line
// if it's not nullptr, there's an open <div> waiting for new strings in the same line
TextString * cur_line;
// (actual x) - (supposed x)
double cur_line_x_offset;
double ctm[6], text_mat[6];
long long cur_fs_id, cur_fn_id;
ofstream html_fout, allcss_fout;
class FontInfo{
public:
long long fn_id;
};
unordered_map<long long, FontInfo> font_name_map;
map<double, long long> font_size_map;
map<double, long long> whitespace_map;
XRef * xref;
// transform matrix
class TM{
public:
TM() {}
TM(double * m) {memcpy(_, m, sizeof(_));}
bool operator < (const TM & m) const {
for(int i = 0; i < 6; ++i)
{
if(_[i] < m._[i] - EPS)
return true;
if(_[i] > m._[i] + EPS)
return false;
}
return false;
}
bool operator == (const TM & m) const {
return _tm_equal(_, m._);
}
double _[6];
};
map<TM, long long> transform_matrix_map;
const Param * param;
};
#endif /* HTMLRENDERER_H_ */

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/*
* Parameters
*
* Wang Lu
* 2012.08.03
*/
#ifndef PARAM_H__
#define PARAM_H__
#include <string>
struct Param
{
std::string owner_password, user_password;
std::string input_filename, output_filename;
int first_page, last_page;
double h_dpi, v_dpi;
double h_eps, v_eps;
int readable;
};
#endif //PARAM_h__

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//========================================================================
// pdftohtmlEX.cc
//
// Copyright (C) 2011 by Hongliang TIAN(tatetian@gmail.com)
// Copyright (C) 2012 by Lu Wang coolwanglu<at>gmail.com
//========================================================================
#include <cstdio>
#include <cstdlib>
#include <cstddef>
#include <cstring>
#include <ctime>
#include <string>
#include <limits>
#include <goo/GooString.h>
#include <boost/program_options.hpp>
#include <boost/algorithm/string/predicate.hpp>
#include "Object.h"
#include "PDFDoc.h"
#include "PDFDocFactory.h"
#include "HTMLRenderer.h"
#include "GlobalParams.h"
#include "Error.h"
#include "DateInfo.h"
#include "Param.h"
#define PDFTOHTMLEX_VERSION "0.1"
namespace po = boost::program_options;
using namespace std;
Param param;
// variables
PDFDoc *doc = nullptr;
GooString *fileName = nullptr;
GooString *ownerPW, *userPW;
GooString *docTitle = nullptr;
GooString *author = nullptr, *keywords = nullptr, *subject = nullptr, *date = nullptr;
HTMLRenderer *htmlOut = nullptr;
int finished = -1;
po::options_description opt_visible("Options"), opt_hidden, opt_all;
po::positional_options_description opt_positional;
//====================helper functions=========================================
/*
static GooString* getInfoString(Dict *infoDict, char *key) {
Object obj;
GooString *s1 = nullptr;
if (infoDict->lookup(key, &obj)->isString()) {
s1 = new GooString(obj.getString());
}
obj.free();
return s1;
}
static GooString* getInfoDate(Dict *infoDict, char *key) {
Object obj;
char *s;
int year, mon, day, hour, min, sec, tz_hour, tz_minute;
char tz;
struct tm tmStruct;
GooString *result = nullptr;
char buf[256];
if (infoDict->lookup(key, &obj)->isString()) {
s = obj.getString()->getCString();
// TODO do something with the timezone info
if ( parseDateString( s, &year, &mon, &day, &hour, &min, &sec, &tz, &tz_hour, &tz_minute ) ) {
tmStruct.tm_year = year - 1900;
tmStruct.tm_mon = mon - 1;
tmStruct.tm_mday = day;
tmStruct.tm_hour = hour;
tmStruct.tm_min = min;
tmStruct.tm_sec = sec;
tmStruct.tm_wday = -1;
tmStruct.tm_yday = -1;
tmStruct.tm_isdst = -1;
mktime(&tmStruct); // compute the tm_wday and tm_yday fields
if (strftime(buf, sizeof(buf), "%Y-%m-%dT%H:%M:%S+00:00", &tmStruct)) {
result = new GooString(buf);
} else {
result = new GooString(s);
}
} else {
result = new GooString(s);
}
}
obj.free();
return result;
}
*/
void show_usage(void)
{
cerr << "pdftohtmlEX version " << PDFTOHTMLEX_VERSION << endl;
cerr << endl;
cerr << "Copyright 2011 Hongliang Tian (tatetian@gmail.com)" << endl;
cerr << "Copyright 2012 Lu Wang (coolwanglu<at>gmail.com)" << endl;
cerr << endl;
cerr << "Usage: pdftohtml [Options] <PDF-file> [<JSON-file>]" << endl;
cerr << endl;
cerr << opt_visible << endl;
}
po::variables_map parse_options (int argc, char **argv)
{
opt_visible.add_options()
("help", "show all options")
("first-page,f", po::value<int>(&param.first_page)->default_value(1), "first page to process")
("last-page,l", po::value<int>(&param.last_page)->default_value(numeric_limits<int>::max()), "last page to process")
("version,v", "show copyright and version info")
("metadata,m", "show the document meta data in JSON")
("owner-password,o", po::value<string>(&param.owner_password)->default_value(""), "owner password (for encrypted files)")
("user-password,u", po::value<string>(&param.user_password)->default_value(""), "user password (for encrypted files)")
("hdpi", po::value<double>(&param.h_dpi)->default_value(72.0), "horizontal DPI")
("vdpi", po::value<double>(&param.v_dpi)->default_value(72.0), "vertical DPI")
("heps", po::value<double>(&param.h_eps)->default_value(1.0), "max tolerated horizontal offset (in pixels)")
("heps", po::value<double>(&param.h_eps)->default_value(1.0), "max tolerated horizontal offset (in pixels)")
("veps", po::value<double>(&param.v_eps)->default_value(1.0), "max tolerated vertical offset (in pixels)")
("readable", po::value<int>(&param.readable)->default_value(0), "make the ouptut human readable")
;
opt_hidden.add_options()
("inputfilename", po::value<string>(&param.input_filename)->default_value(""), "")
("outputfilename", po::value<string>(&param.output_filename)->default_value(""), "")
;
opt_positional.add("inputfilename", 1).add("outputfilename",1);
opt_all.add(opt_visible).add(opt_hidden);
try {
po::variables_map opt_vm;
po::store(po::command_line_parser(argc, argv).options(opt_all).positional(opt_positional).run()
, opt_vm);
po::notify(opt_vm);
return opt_vm;
}
catch(...) {
show_usage();
exit(-1);
}
}
//====================entry point==============================================
int main(int argc, char **argv)
{
auto opt_map = parse_options(argc, argv);
if (opt_map.count("version") || opt_map.count("help") || (param.input_filename == ""))
{
show_usage();
return -1;
}
// read config file
globalParams = new GlobalParams();
// open PDF file
ownerPW = (param.owner_password == "") ? (nullptr) : (new GooString(param.owner_password.c_str()));
userPW = (param.user_password == "") ? (nullptr) : (new GooString(param.user_password.c_str()));
fileName = new GooString(param.input_filename.c_str());
doc = PDFDocFactory().createPDFDoc(*fileName, ownerPW, userPW);
delete userPW;
delete ownerPW;
if (!doc->isOk()) {
goto error;
}
// check for copy permission
if (!doc->okToCopy()) {
error(errNotAllowed, -1, "Copying of text from this document is not allowed.");
goto error;
}
param.first_page = min(max(param.first_page, 1), doc->getNumPages());
param.last_page = min(max(param.last_page, param.first_page), doc->getNumPages());
/*
// get meta info
doc->getDocInfo(&info);
if (info.isDict()) {
docTitle = getInfoString(info.getDict(), "Title");
author = getInfoString(info.getDict(), "Author");
keywords = getInfoString(info.getDict(), "Keywords");
subject = getInfoString(info.getDict(), "Subject");
date = getInfoDate(info.getDict(), "ModDate");
if( !date )
date = getInfoDate(info.getDict(), "CreationDate");
}
info.free();
if( !docTitle ) docTitle = fileName->copy();
*/
if(param.output_filename == "")
{
const auto & s = param.input_filename;
if(boost::algorithm::ends_with(s, ".pdf"))
{
param.output_filename = s.substr(0, s.size() - 4) + ".html";
}
else
{
param.output_filename = s + ".html";
}
}
htmlOut = new HTMLRenderer(&param);
htmlOut->process(doc);
{
/*
escapeHTMLString(docTitle);
if(author) escapeHTMLString(author);
if(date) escapeHTMLString(date);
printf("{\"doc_id\": \"\", \"title\":\"%s\", \"author\":\"%s\",\"mod_date\":\"%s\",\n",
docTitle->getCString(),
author? author->getCString():"",
date? date->getCString():"");
printf("\"pages\":[\n");
*/
}
delete htmlOut;
delete docTitle;
if( author ) delete author;
if( keywords ) delete keywords;
if( subject ) delete subject;
if( date ) delete date;
finished = 0;
// clean up
error:
if(doc) delete doc;
delete fileName;
if(globalParams) delete globalParams;
// check for memory leaks
Object::memCheck(stderr);
gMemReport(stderr);
return finished;
}