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pdf2htmlEX
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pdf2htmlEX/src/pdf2htmlEX.cc

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// pdf2htmlEX.cc
//
// Copyright (C) 2012-2014 Lu Wang <coolwanglu@gmail.com>
#include <cstdio>
#include <cstdlib>
#include <cstddef>
#include <cstring>
#include <ctime>
#include <string>
#include <limits>
#include <iostream>
#include <memory>
#include <errno.h>
#include <getopt.h>
#include <poppler-config.h>
#include <goo/GooString.h>
#include <Object.h>
#include <PDFDoc.h>
#include <PDFDocFactory.h>
#include <GlobalParams.h>
#include "pdf2htmlEX-config.h"
#if ENABLE_SVG
#include <cairo.h>
#endif
#include "ArgParser.h"
#include "Param.h"
#include "HTMLRenderer/HTMLRenderer.h"
#include "util/path.h"
#include "util/ffw.h"
#ifdef __MINGW32__
#include "util/mingw.h"
#endif
using namespace std;
using namespace pdf2htmlEX;
Param param;
ArgParser argparser;
void show_usage_and_exit(const char * dummy = nullptr)
{
cerr << "Usage: pdf2htmlEX [options] <input.pdf> [<output.html>]" << endl;
argparser.show_usage(cerr);
exit(EXIT_FAILURE);
}
void show_version_and_exit(const char * dummy = nullptr)
{
cerr << "pdf2htmlEX version " << PDF2HTMLEX_VERSION << endl;
cerr << "Copyright 2012-2014 Lu Wang <coolwanglu@gmail.com> and other contributors" << endl;
cerr << "Libraries: " << endl;
cerr << " poppler " << POPPLER_VERSION << endl;
cerr << " libfontforge " << ffw_get_version() << endl;
#if ENABLE_SVG
cerr << " cairo " << cairo_version_string() << endl;
#endif
cerr << "Default data-dir: " << param.data_dir << endl;
cerr << "Supported image format:";
#ifdef ENABLE_LIBPNG
cerr << " png";
#endif
#ifdef ENABLE_LIBJPEG
cerr << " jpg";
#endif
#if ENABLE_SVG
cerr << " svg";
#endif
cerr << endl;
// TODO: define constants
if(ffw_get_version() < 20130101LL)
{
cerr << endl
<< "Warning: pdf2htmlEX has been built with a too old version of Fontforge, which is not supported." << endl;
}
cerr << endl;
exit(EXIT_SUCCESS);
}
void embed_parser (const char * str)
{
while(true)
{
switch(*str)
{
case '\0': return; break;
case 'c': param.embed_css = 0; break;
case 'C': param.embed_css = 1; break;
case 'f': param.embed_font = 0; break;
case 'F': param.embed_font = 1; break;
case 'i': param.embed_image = 0; break;
case 'I': param.embed_image = 1; break;
case 'j': param.embed_javascript = 0; break;
case 'J': param.embed_javascript = 1; break;
case 'o': param.embed_outline = 0; break;
case 'O': param.embed_outline = 1; break;
default:
cerr << "Unknown character `" << (*str) << "` for --embed" << endl;
break;
}
++ str;
}
}
void prepare_directories()
{
std::string tmp_dir = param.tmp_dir + "/pdf2htmlEX-XXXXXX";
errno = 0;
unique_ptr<char> pBuf(new char[tmp_dir.size() + 1]);
strcpy(pBuf.get(), tmp_dir.c_str());
auto p = mkdtemp(pBuf.get());
if(p == nullptr)
{
const char * errmsg = strerror(errno);
if(!errmsg)
{
errmsg = "unknown error";
}
cerr << "Cannot create temp directory: " << errmsg << endl;
exit(EXIT_FAILURE);
}
param.tmp_dir = pBuf.get();
}
void parse_options (int argc, char **argv)
{
argparser
// pages
.add("first-page,f", &param.first_page, 1, "first page to convert")
.add("last-page,l", &param.last_page, numeric_limits<int>::max(), "last page to convert")
// dimensions
.add("zoom", &param.zoom, 0, "zoom ratio", true)
.add("fit-width", &param.fit_width, 0, "fit width to <fp> pixels", true)
.add("fit-height", &param.fit_height, 0, "fit height to <fp> pixels", true)
.add("use-cropbox", &param.use_cropbox, 1, "use CropBox instead of MediaBox")
.add("hdpi", &param.h_dpi, 144.0, "horizontal resolution for graphics in DPI")
.add("vdpi", &param.v_dpi, 144.0, "vertical resolution for graphics in DPI")
// output files
.add("embed", "specify which elements should be embedded into output", embed_parser, true)
.add("embed-css", &param.embed_css, 1, "embed CSS files into output")
.add("embed-font", &param.embed_font, 1, "embed font files into output")
.add("embed-image", &param.embed_image, 1, "embed image files into output")
.add("embed-javascript", &param.embed_javascript, 1, "embed JavaScript files into output")
.add("embed-outline", &param.embed_outline, 1, "embed outlines into output")
.add("split-pages", &param.split_pages, 0, "split pages into separate files")
.add("dest-dir", &param.dest_dir, ".", "specify destination directory")
.add("css-filename", &param.css_filename, "", "filename of the generated css file")
.add("page-filename", &param.page_filename, "", "filename template for split pages ")
.add("outline-filename", &param.outline_filename, "", "filename of the generated outline file")
.add("process-nontext", &param.process_nontext, 1, "render graphics in addition to text")
.add("process-outline", &param.process_outline, 1, "show outline in HTML")
.add("process-annotation", &param.process_annotation, 0, "show annotation in HTML")
.add("process-form", &param.process_form, 0, "include text fields and radio buttons")
.add("printing", &param.printing, 1, "enable printing support")
.add("fallback", &param.fallback, 0, "output in fallback mode")
.add("tmp-file-size-limit", &param.tmp_file_size_limit, -1, "Maximum size (in KB) used by temporary files, -1 for no limit.")
// fonts
.add("embed-external-font", &param.embed_external_font, 1, "embed local match for external fonts")
.add("font-format", &param.font_format, "woff", "suffix for embedded font files (ttf,otf,woff,svg)")
.add("decompose-ligature", &param.decompose_ligature, 0, "decompose ligatures, such as \uFB01 -> fi")
.add("auto-hint", &param.auto_hint, 0, "use fontforge autohint on fonts without hints")
.add("external-hint-tool", &param.external_hint_tool, "", "external tool for hinting fonts (overrides --auto-hint)")
.add("stretch-narrow-glyph", &param.stretch_narrow_glyph, 0, "stretch narrow glyphs instead of padding them")
.add("squeeze-wide-glyph", &param.squeeze_wide_glyph, 1, "shrink wide glyphs instead of truncating them")
.add("override-fstype", &param.override_fstype, 0, "clear the fstype bits in TTF/OTF fonts")
.add("process-type3", &param.process_type3, 0, "convert Type 3 fonts for web (experimental)")
// text
.add("heps", &param.h_eps, 1.0, "horizontal threshold for merging text, in pixels")
.add("veps", &param.v_eps, 1.0, "vertical threshold for merging text, in pixels")
.add("space-threshold", &param.space_threshold, (1.0/8), "word break threshold (threshold * em)")
.add("font-size-multiplier", &param.font_size_multiplier, 4.0, "a value greater than 1 increases the rendering accuracy")
.add("space-as-offset", &param.space_as_offset, 0, "treat space characters as offsets")
.add("tounicode", &param.tounicode, 0, "how to handle ToUnicode CMaps (0=auto, 1=force, -1=ignore)")
.add("optimize-text", &param.optimize_text, 0, "try to reduce the number of HTML elements used for text")
.add("correct-text-visibility", &param.correct_text_visibility, 0, "try to detect texts covered by other graphics and properly arrange them")
// background image
.add("bg-format", &param.bg_format, "png", "specify background image format")
.add("svg-node-count-limit", &param.svg_node_count_limit, -1, "if node count in a svg background image exceeds this limit,"
" fall back this page to bitmap background; negative value means no limit.")
.add("svg-embed-bitmap", &param.svg_embed_bitmap, 1, "1: embed bitmaps in svg background; 0: dump bitmaps to external files if possible.")
// encryption
.add("owner-password,o", &param.owner_password, "", "owner password (for encrypted files)", true)
.add("user-password,u", &param.user_password, "", "user password (for encrypted files)", true)
.add("no-drm", &param.no_drm, 0, "override document DRM settings")
// misc.
.add("clean-tmp", &param.clean_tmp, 1, "remove temporary files after conversion")
.add("tmp-dir", &param.tmp_dir, param.tmp_dir, "specify the location of temporary directory.")
.add("data-dir", &param.data_dir, param.data_dir, "specify data directory")
.add("debug", &param.debug, 0, "print debugging information")
.add("proof", &param.proof, 0, "texts are drawn on both text layer and background for proof.")
// meta
.add("version,v", "print copyright and version info", &show_version_and_exit)
.add("help,h", "print usage information", &show_usage_and_exit)
.add("", &param.input_filename, "", "")
.add("", &param.output_filename, "", "")
;
try
{
argparser.parse(argc, argv);
}
catch(const char * s)
{
// if s == "", getopt_long would have printed the error message
if(s && s[0])
{
cerr << "Error when parsing the arguments:" << endl;
cerr << s << endl;
}
exit(EXIT_FAILURE);
}
catch(const std::string & s)
{
// if s == "", getopt_long would have printed the error message
if(s != "")
{
cerr << "Error when parsing the arguments:" << endl;
cerr << s << endl;
}
exit(EXIT_FAILURE);
}
}
void check_param()
{
if (param.input_filename == "")
{
show_usage_and_exit();
}
if(param.output_filename.empty())
{
const string s = get_filename(param.input_filename);
if(get_suffix(param.input_filename) == ".pdf")
{
param.output_filename = s.substr(0, s.size() - 4) + ".html";
}
else
{
param.output_filename = s + ".html";
}
}
if(param.page_filename.empty())
{
const string s = get_filename(param.input_filename);
if(get_suffix(param.input_filename) == ".pdf")
{
param.page_filename = s.substr(0, s.size() - 4) + "%d.page";
}
else
{
param.page_filename = s + "%d.page";
}
sanitize_filename(param.page_filename);
}
else
{
// Need to make sure we have a page number placeholder in the filename
if(!sanitize_filename(param.page_filename))
{
// Inject the placeholder just before the file extension
const string suffix = get_suffix(param.page_filename);
param.page_filename = param.page_filename.substr(0, param.page_filename.size() - suffix.size()) + "%d" + suffix;
sanitize_filename(param.page_filename);
}
}
if(param.css_filename.empty())
{
const string s = get_filename(param.input_filename);
if(get_suffix(param.input_filename) == ".pdf")
{
param.css_filename = s.substr(0, s.size() - 4) + ".css";
}
else
{
if(!param.split_pages)
param.css_filename = s + ".css";
}
}
if(param.outline_filename.empty())
{
const string s = get_filename(param.input_filename);
if(get_suffix(param.input_filename) == ".pdf")
{
param.outline_filename = s.substr(0, s.size() - 4) + ".outline";
}
else
{
if(!param.split_pages)
param.outline_filename = s + ".outline";
}
}
if(false) { }
#ifdef ENABLE_LIBPNG
else if (param.bg_format == "png") { }
#endif
#ifdef ENABLE_LIBJPEG
else if (param.bg_format == "jpg") { }
#endif
#if ENABLE_SVG
else if(param.bg_format == "svg") { }
#endif
else
{
cerr << "Image format not supported: " << param.bg_format << endl;
exit(EXIT_FAILURE);
}
#if not ENABLE_SVG
if(param.process_type3)
{
cerr << "process-type3 is enabled, however SVG support is not built in this version of pdf2htmlEX." << endl;
exit(EXIT_FAILURE);
}
#endif
if((param.font_format == "ttf") && (param.external_hint_tool == ""))
{
cerr << "Warning: No hint tool is specified for truetype fonts, the result may be rendered poorly in some circumstances." << endl;
}
if (param.embed_image && (param.bg_format == "svg") && !param.svg_embed_bitmap)
{
cerr << "Warning: --svg-embed-bitmap is forced on because --embed-image is on, or the dumped bitmaps can't be loaded." << endl;
param.svg_embed_bitmap = 1;
}
}
int main(int argc, char **argv)
{
// We need to adjust these directories before parsing the options.
#if defined(__MINGW32__)
param.data_dir = get_exec_dir(argv[0]);
param.tmp_dir = get_tmp_dir();
#else
char const* tmp = getenv("TMPDIR");
#ifdef P_tmpdir
if (!tmp)
tmp = P_tmpdir;
#endif
#ifdef _PATH_TMP
if (!tmp)
tmp = _PATH_TMP;
#endif
if (!tmp)
tmp = "/tmp";
param.tmp_dir = string(tmp);
param.data_dir = PDF2HTMLEX_DATA_PATH;
#endif
parse_options(argc, argv);
check_param();
//prepare the directories
prepare_directories();
if(param.debug)
cerr << "temporary dir: " << (param.tmp_dir) << endl;
try
{
create_directories(param.dest_dir);
}
catch (const string & s)
{
cerr << s << endl;
exit(EXIT_FAILURE);
}
bool finished = false;
// read config file
globalParams = new GlobalParams();
// open PDF file
PDFDoc * doc = nullptr;
try
{
{
GooString * ownerPW = (param.owner_password == "") ? (nullptr) : (new GooString(param.owner_password.c_str()));
GooString * userPW = (param.user_password == "") ? (nullptr) : (new GooString(param.user_password.c_str()));
GooString fileName(param.input_filename.c_str());
doc = PDFDocFactory().createPDFDoc(fileName, ownerPW, userPW);
delete userPW;
delete ownerPW;
}
if (!doc->isOk())
throw "Cannot read the file";
// check for copy permission
if (!doc->okToCopy())
{
if (param.no_drm == 0)
throw "Copying of text from this document is not allowed.";
cerr << "Document has copy-protection bit set." << endl;
}
param.first_page = min<int>(max<int>(param.first_page, 1), doc->getNumPages());
param.last_page = min<int>(max<int>(param.last_page, param.first_page), doc->getNumPages());
unique_ptr<HTMLRenderer>(new HTMLRenderer(param))->process(doc);
finished = true;
}
catch (const char * s)
{
cerr << "Error: " << s << endl;
}
catch (const string & s)
{
cerr << "Error: " << s << endl;
}
// clean up
delete doc;
delete globalParams;
// check for memory leaks
Object::memCheck(stderr);
gMemReport(stderr);
exit(finished ? (EXIT_SUCCESS) : (EXIT_FAILURE));
return 0;
}
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