mirror of
https://github.com/pdf2htmlEX/pdf2htmlEX.git
synced 2024-10-06 03:51:40 +00:00
448 lines
15 KiB
C++
448 lines
15 KiB
C++
// pdf2htmlEX.cc
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//
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// Copyright (C) 2012-2014 Lu Wang <coolwanglu@gmail.com>
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#include <cstdio>
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#include <cstdlib>
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#include <cstddef>
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#include <cstring>
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#include <ctime>
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#include <string>
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#include <limits>
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#include <iostream>
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#include <memory>
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#include <errno.h>
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#include <getopt.h>
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#include <poppler-config.h>
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#include <goo/GooString.h>
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#include <Object.h>
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#include <PDFDoc.h>
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#include <PDFDocFactory.h>
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#include <GlobalParams.h>
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#include "pdf2htmlEX-config.h"
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#if ENABLE_SVG
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#include <cairo.h>
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#endif
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#include "ArgParser.h"
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#include "Param.h"
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#include "HTMLRenderer/HTMLRenderer.h"
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#include "util/path.h"
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#include "util/ffw.h"
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#ifdef __MINGW32__
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#include "util/mingw.h"
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#endif
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using namespace std;
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using namespace pdf2htmlEX;
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Param param;
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ArgParser argparser;
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void show_usage_and_exit(const char * dummy = nullptr)
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{
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cerr << "Usage: pdf2htmlEX [options] <input.pdf> [<output.html>]" << endl;
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argparser.show_usage(cerr);
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exit(EXIT_FAILURE);
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}
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void show_version_and_exit(const char * dummy = nullptr)
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{
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cerr << "pdf2htmlEX version " << PDF2HTMLEX_VERSION << endl;
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cerr << "Copyright 2012-2014 Lu Wang <coolwanglu@gmail.com> and other contributors" << endl;
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cerr << "Libraries: " << endl;
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cerr << " poppler " << POPPLER_VERSION << endl;
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cerr << " libfontforge " << ffw_get_version() << endl;
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#if ENABLE_SVG
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cerr << " cairo " << cairo_version_string() << endl;
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#endif
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cerr << "Default data-dir: " << param.data_dir << endl;
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cerr << "Supported image format:";
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#ifdef ENABLE_LIBPNG
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cerr << " png";
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#endif
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#ifdef ENABLE_LIBJPEG
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cerr << " jpg";
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#endif
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#if ENABLE_SVG
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cerr << " svg";
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#endif
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cerr << endl;
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// TODO: define constants
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if(ffw_get_version() < 20130101LL)
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{
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cerr << endl
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<< "Warning: pdf2htmlEX has been built with a too old version of Fontforge, which is not supported." << endl;
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}
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cerr << endl;
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exit(EXIT_SUCCESS);
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}
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void embed_parser (const char * str)
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{
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while(true)
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{
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switch(*str)
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{
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case '\0': return; break;
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case 'c': param.embed_css = 0; break;
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case 'C': param.embed_css = 1; break;
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case 'f': param.embed_font = 0; break;
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case 'F': param.embed_font = 1; break;
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case 'i': param.embed_image = 0; break;
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case 'I': param.embed_image = 1; break;
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case 'j': param.embed_javascript = 0; break;
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case 'J': param.embed_javascript = 1; break;
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case 'o': param.embed_outline = 0; break;
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case 'O': param.embed_outline = 1; break;
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default:
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cerr << "Unknown character `" << (*str) << "` for --embed" << endl;
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break;
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}
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++ str;
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}
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}
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void prepare_directories()
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{
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std::string tmp_dir = param.tmp_dir + "/pdf2htmlEX-XXXXXX";
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errno = 0;
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unique_ptr<char> pBuf(new char[tmp_dir.size() + 1]);
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strcpy(pBuf.get(), tmp_dir.c_str());
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auto p = mkdtemp(pBuf.get());
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if(p == nullptr)
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{
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const char * errmsg = strerror(errno);
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if(!errmsg)
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{
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errmsg = "unknown error";
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}
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cerr << "Cannot create temp directory: " << errmsg << endl;
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exit(EXIT_FAILURE);
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}
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param.tmp_dir = pBuf.get();
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}
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void parse_options (int argc, char **argv)
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{
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argparser
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// pages
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.add("first-page,f", ¶m.first_page, 1, "first page to convert")
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.add("last-page,l", ¶m.last_page, numeric_limits<int>::max(), "last page to convert")
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// dimensions
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.add("zoom", ¶m.zoom, 0, "zoom ratio", true)
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.add("fit-width", ¶m.fit_width, 0, "fit width to <fp> pixels", true)
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.add("fit-height", ¶m.fit_height, 0, "fit height to <fp> pixels", true)
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.add("use-cropbox", ¶m.use_cropbox, 1, "use CropBox instead of MediaBox")
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.add("hdpi", ¶m.h_dpi, 144.0, "horizontal resolution for graphics in DPI")
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.add("vdpi", ¶m.v_dpi, 144.0, "vertical resolution for graphics in DPI")
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// output files
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.add("embed", "specify which elements should be embedded into output", embed_parser, true)
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.add("embed-css", ¶m.embed_css, 1, "embed CSS files into output")
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.add("embed-font", ¶m.embed_font, 1, "embed font files into output")
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.add("embed-image", ¶m.embed_image, 1, "embed image files into output")
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.add("embed-javascript", ¶m.embed_javascript, 1, "embed JavaScript files into output")
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.add("embed-outline", ¶m.embed_outline, 1, "embed outlines into output")
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.add("split-pages", ¶m.split_pages, 0, "split pages into separate files")
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.add("dest-dir", ¶m.dest_dir, ".", "specify destination directory")
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.add("css-filename", ¶m.css_filename, "", "filename of the generated css file")
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.add("page-filename", ¶m.page_filename, "", "filename template for split pages ")
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.add("outline-filename", ¶m.outline_filename, "", "filename of the generated outline file")
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.add("process-nontext", ¶m.process_nontext, 1, "render graphics in addition to text")
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.add("process-outline", ¶m.process_outline, 1, "show outline in HTML")
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.add("process-annotation", ¶m.process_annotation, 0, "show annotation in HTML")
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.add("printing", ¶m.printing, 1, "enable printing support")
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.add("fallback", ¶m.fallback, 0, "output in fallback mode")
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.add("tmp-file-size-limit", ¶m.tmp_file_size_limit, -1, "Maximum size (in KB) used by temporary files, -1 for no limit.")
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// fonts
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.add("embed-external-font", ¶m.embed_external_font, 1, "embed local match for external fonts")
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.add("font-format", ¶m.font_format, "woff", "suffix for embedded font files (ttf,otf,woff,svg)")
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.add("decompose-ligature", ¶m.decompose_ligature, 0, "decompose ligatures, such as \uFB01 -> fi")
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.add("auto-hint", ¶m.auto_hint, 0, "use fontforge autohint on fonts without hints")
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.add("external-hint-tool", ¶m.external_hint_tool, "", "external tool for hinting fonts (overrides --auto-hint)")
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.add("stretch-narrow-glyph", ¶m.stretch_narrow_glyph, 0, "stretch narrow glyphs instead of padding them")
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.add("squeeze-wide-glyph", ¶m.squeeze_wide_glyph, 1, "shrink wide glyphs instead of truncating them")
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.add("override-fstype", ¶m.override_fstype, 0, "clear the fstype bits in TTF/OTF fonts")
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.add("process-type3", ¶m.process_type3, 0, "convert Type 3 fonts for web (experimental)")
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// text
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.add("heps", ¶m.h_eps, 1.0, "horizontal threshold for merging text, in pixels")
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.add("veps", ¶m.v_eps, 1.0, "vertical threshold for merging text, in pixels")
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.add("space-threshold", ¶m.space_threshold, (1.0/8), "word break threshold (threshold * em)")
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.add("font-size-multiplier", ¶m.font_size_multiplier, 4.0, "a value greater than 1 increases the rendering accuracy")
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.add("space-as-offset", ¶m.space_as_offset, 0, "treat space characters as offsets")
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.add("tounicode", ¶m.tounicode, 0, "how to handle ToUnicode CMaps (0=auto, 1=force, -1=ignore)")
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.add("optimize-text", ¶m.optimize_text, 0, "try to reduce the number of HTML elements used for text")
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.add("correct-text-visibility", ¶m.correct_text_visibility, 0, "try to detect texts covered by other graphics and properly arrange them")
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// background image
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.add("bg-format", ¶m.bg_format, "png", "specify background image format")
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.add("svg-node-count-limit", ¶m.svg_node_count_limit, -1, "if node count in a svg background image exceeds this limit,"
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" fall back this page to bitmap background; negative value means no limit.")
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.add("svg-embed-bitmap", ¶m.svg_embed_bitmap, 1, "1: embed bitmaps in svg background; 0: dump bitmaps to external files if possible.")
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// encryption
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.add("owner-password,o", ¶m.owner_password, "", "owner password (for encrypted files)", true)
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.add("user-password,u", ¶m.user_password, "", "user password (for encrypted files)", true)
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.add("no-drm", ¶m.no_drm, 0, "override document DRM settings")
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// misc.
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.add("clean-tmp", ¶m.clean_tmp, 1, "remove temporary files after conversion")
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.add("tmp-dir", ¶m.tmp_dir, param.tmp_dir, "specify the location of temporary directory.")
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.add("data-dir", ¶m.data_dir, param.data_dir, "specify data directory")
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.add("debug", ¶m.debug, 0, "print debugging information")
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.add("proof", ¶m.proof, 0, "texts are drawn on both text layer and background for proof.")
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// meta
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.add("version,v", "print copyright and version info", &show_version_and_exit)
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.add("help,h", "print usage information", &show_usage_and_exit)
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.add("", ¶m.input_filename, "", "")
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.add("", ¶m.output_filename, "", "")
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;
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try
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{
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argparser.parse(argc, argv);
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}
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catch(const char * s)
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{
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// if s == "", getopt_long would have printed the error message
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if(s && s[0])
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{
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cerr << "Error when parsing the arguments:" << endl;
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cerr << s << endl;
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}
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exit(EXIT_FAILURE);
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}
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catch(const std::string & s)
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{
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// if s == "", getopt_long would have printed the error message
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if(s != "")
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{
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cerr << "Error when parsing the arguments:" << endl;
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cerr << s << endl;
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}
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exit(EXIT_FAILURE);
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}
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}
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void check_param()
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{
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if (param.input_filename == "")
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{
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show_usage_and_exit();
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}
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if(param.output_filename.empty())
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{
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const string s = get_filename(param.input_filename);
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if(get_suffix(param.input_filename) == ".pdf")
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{
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param.output_filename = s.substr(0, s.size() - 4) + ".html";
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}
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else
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{
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param.output_filename = s + ".html";
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}
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}
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if(param.page_filename.empty())
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{
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const string s = get_filename(param.input_filename);
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if(get_suffix(param.input_filename) == ".pdf")
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{
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param.page_filename = s.substr(0, s.size() - 4) + "%d.page";
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}
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else
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{
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param.page_filename = s + "%d.page";
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}
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sanitize_filename(param.page_filename);
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}
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else
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{
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// Need to make sure we have a page number placeholder in the filename
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if(!sanitize_filename(param.page_filename))
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{
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// Inject the placeholder just before the file extension
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const string suffix = get_suffix(param.page_filename);
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param.page_filename = param.page_filename.substr(0, param.page_filename.size() - suffix.size()) + "%d" + suffix;
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sanitize_filename(param.page_filename);
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}
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}
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if(param.css_filename.empty())
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{
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const string s = get_filename(param.input_filename);
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if(get_suffix(param.input_filename) == ".pdf")
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{
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param.css_filename = s.substr(0, s.size() - 4) + ".css";
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}
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else
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{
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if(!param.split_pages)
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param.css_filename = s + ".css";
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}
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}
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if(param.outline_filename.empty())
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{
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const string s = get_filename(param.input_filename);
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if(get_suffix(param.input_filename) == ".pdf")
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{
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param.outline_filename = s.substr(0, s.size() - 4) + ".outline";
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}
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else
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{
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if(!param.split_pages)
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param.outline_filename = s + ".outline";
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}
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}
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if(false) { }
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#ifdef ENABLE_LIBPNG
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else if (param.bg_format == "png") { }
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#endif
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#ifdef ENABLE_LIBJPEG
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else if (param.bg_format == "jpg") { }
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#endif
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#if ENABLE_SVG
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else if(param.bg_format == "svg") { }
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#endif
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else
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{
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cerr << "Image format not supported: " << param.bg_format << endl;
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exit(EXIT_FAILURE);
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}
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#if not ENABLE_SVG
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if(param.process_type3)
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{
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cerr << "process-type3 is enabled, however SVG support is not built in this version of pdf2htmlEX." << endl;
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exit(EXIT_FAILURE);
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}
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#endif
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if((param.font_format == "ttf") && (param.external_hint_tool == ""))
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{
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cerr << "Warning: No hint tool is specified for truetype fonts, the result may be rendered poorly in some circumstances." << endl;
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}
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}
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int main(int argc, char **argv)
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{
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// We need to adjust these directories before parsing the options.
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#if defined(__MINGW32__)
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param.data_dir = get_exec_dir(argv[0]);
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param.tmp_dir = get_tmp_dir();
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#else
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char const* tmp = getenv("TMPDIR");
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#ifdef P_tmpdir
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if (!tmp)
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tmp = P_tmpdir;
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#endif
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#ifdef _PATH_TMP
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if (!tmp)
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tmp = _PATH_TMP;
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#endif
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if (!tmp)
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tmp = "/tmp";
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param.tmp_dir = string(tmp);
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param.data_dir = PDF2HTMLEX_DATA_PATH;
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#endif
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parse_options(argc, argv);
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check_param();
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//prepare the directories
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prepare_directories();
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if(param.debug)
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cerr << "temporary dir: " << (param.tmp_dir) << endl;
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try
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{
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create_directories(param.dest_dir);
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}
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catch (const string & s)
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{
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cerr << s << endl;
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exit(EXIT_FAILURE);
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}
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bool finished = false;
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// read config file
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globalParams = new GlobalParams();
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// open PDF file
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PDFDoc * doc = nullptr;
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try
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{
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{
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GooString * ownerPW = (param.owner_password == "") ? (nullptr) : (new GooString(param.owner_password.c_str()));
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GooString * userPW = (param.user_password == "") ? (nullptr) : (new GooString(param.user_password.c_str()));
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GooString fileName(param.input_filename.c_str());
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doc = PDFDocFactory().createPDFDoc(fileName, ownerPW, userPW);
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delete userPW;
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delete ownerPW;
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}
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if (!doc->isOk())
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throw "Cannot read the file";
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// check for copy permission
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if (!doc->okToCopy())
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{
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if (param.no_drm == 0)
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throw "Copying of text from this document is not allowed.";
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cerr << "Document has copy-protection bit set." << endl;
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}
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param.first_page = min<int>(max<int>(param.first_page, 1), doc->getNumPages());
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param.last_page = min<int>(max<int>(param.last_page, param.first_page), doc->getNumPages());
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unique_ptr<HTMLRenderer>(new HTMLRenderer(param))->process(doc);
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finished = true;
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}
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catch (const char * s)
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{
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cerr << "Error: " << s << endl;
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}
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catch (const string & s)
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{
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cerr << "Error: " << s << endl;
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}
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// clean up
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delete doc;
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delete globalParams;
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// check for memory leaks
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Object::memCheck(stderr);
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gMemReport(stderr);
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exit(finished ? (EXIT_SUCCESS) : (EXIT_FAILURE));
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return 0;
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}
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