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main.cc
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/* Copyright © 2007-2022 Jakub Wilk <jwilk@jwilk.net>
* Copyright © 2009 Mateusz Turcza
*
* This file is part of pdf2djvu.
*
* pdf2djvu is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* pdf2djvu is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*/
#include <algorithm>
#include <cassert>
#include <cerrno>
#include <cstddef>
#include <cstdint>
#include <cstdlib>
#include <iomanip>
#include <iostream>
#include <limits>
#include <map>
#include <memory>
#include <set>
#include <sstream>
#include <stdexcept>
#include <string>
#include <utility>
#include <vector>
#if _OPENMP
#include <omp.h>
#endif
#include "config.hh"
#include "debug.hh"
#include "djvu-const.hh"
#include "djvu-outline.hh"
#include "i18n.hh"
#include "image-filter.hh"
#include "paths.hh"
#include "pdf-backend.hh"
#include "pdf-document-map.hh"
#include "pdf-dpi.hh"
#include "pdf-unicode.hh"
#include "sexpr.hh"
#include "string-format.hh"
#include "string-printf.hh"
#include "string-utils.hh"
#include "system.hh"
#include "version.hh"
#include "xmp.hh"
#ifdef USE_HEAP_PROFILING
#include <gperftools/heap-profiler.h>
#endif
static Config config;
static inline DebugStream &debug(int n)
{
return debug(n, config.verbose);
}
class NoLinkDestination : public std::runtime_error
{
public:
NoLinkDestination()
: std::runtime_error(_("Cannot find link destination"))
{ }
};
static int get_page_for_goto_link(pdf::link::GoTo *goto_link, pdf::Catalog *catalog)
{
std::unique_ptr<pdf::link::Destination> dest;
#if POPPLER_VERSION >= 6400
const
#endif
pdf::link::Destination *orig_dest = goto_link->getDest();
if (orig_dest == nullptr)
{
#if POPPLER_VERSION >= 8600
dest = catalog->findDest(goto_link->getNamedDest());
#else
dest.reset(catalog->findDest(goto_link->getNamedDest()));
#endif
}
else
dest.reset(new pdf::link::Destination(*orig_dest));
if (dest.get() != nullptr)
{
int page;
if (dest->isPageRef())
{
pdf::Ref pageref = dest->getPageRef();
page = pdf::find_page(catalog, pageref);
}
else
page = dest->getPageNum();
return page;
}
else
throw NoLinkDestination();
}
static bool is_foreground_color_map(pdf::gfx::ImageColorMap *color_map)
{
return (color_map->getNumPixelComps() <= 1 && color_map->getBits() <= 1);
}
class PageMap : protected std::map<int, int>
{
protected:
int max;
public:
PageMap()
{
this->max = std::numeric_limits<int>::min();
}
int get_max() const
{
return this->max;
}
int get(int n) const
{
const_iterator it = this->find(n);
if (it == this->end())
throw std::logic_error(_("Page not found"));
return it->second;
}
int get(int n, int m) const
{
const_iterator it = this->find(n);
if (it == this->end())
return m;
return it->second;
}
void set(int n, int m)
{
if (m > this->max)
this->max = m;
(*this)[n] = m;
}
};
class Component
{
protected:
std::string title;
bool title_set;
File *file;
public:
explicit Component(File &file, const std::string &title = "")
: title(title), title_set(false),
file(&file)
{
file.close();
}
Component(const Component &component)
: title(component.title),
title_set(component.title_set),
file(component.file)
{
}
const std::string & get_title() const
{
assert(this->title_set);
return this->title;
}
const std::string & set_title(const std::string &title)
{
this->title = title;
// TODO: issue a warning if the title contains null bytes
string::replace_all(
this->title, '\0',
"\xEF\xBF\xBD" // U+FFFD REPLACEMENT CHARACTER
);
this->title_set = true;
return this->title;
}
const std::string & get_basename() const
{
return this->file->get_basename();
}
std::streamoff size()
{
std::streamoff result;
this->file->reopen();
result = this->file->size();
this->file->close();
return result;
}
friend std::ostream &operator <<(std::ostream &, const Component &);
friend Command &operator <<(Command &, const Component &);
};
Command &operator <<(Command &command, const Component &component)
{
command << *component.file;
return command;
}
std::ostream &operator <<(std::ostream &stream, const Component &component)
{
stream << *component.file;
return stream;
}
class ComponentList
{
protected:
std::vector<File*> files;
std::vector<Component*> components;
const PageMap &page_map;
ComponentList(int n, const PageMap &page_map)
: files(n), components(n), page_map(page_map)
{ }
void clean_files()
{
for (auto &component : this->components)
{
delete component;
component = nullptr;
}
for (auto &file : this->files)
{
delete file;
file = nullptr;
}
}
string_format::Bindings get_bindings(int n) const
{
string_format::Bindings bindings;
bindings["max_spage"] = this->files.size();
bindings["spage"] = n;
bindings["max_page"] = this->files.size();
bindings["page"] = n;
bindings["max_dpage"] = this->page_map.get_max();
bindings["dpage"] = this->page_map.get(n, 0);
return bindings;
}
virtual File *create_file(const std::string &id)
= 0;
public:
std::string get_title(int n, const std::string &label) const
{
string_format::Bindings bindings = this->get_bindings(n);
bindings["label"] = label;
return config.page_title_template->format(bindings);
}
virtual Component &operator[](int n)
{
std::vector<Component*>::reference tmpfile_ptr = this->components.at(n - 1);
if (tmpfile_ptr == nullptr)
{
this->files[n - 1] = this->create_file(this->get_file_name(n));
tmpfile_ptr = new Component(*this->files[n - 1]);
}
return *tmpfile_ptr;
}
std::string get_file_name(int n) const
{
string_format::Bindings bindings = this->get_bindings(n);
return config.page_id_template->format(bindings);
}
virtual ~ComponentList()
{
this->clean_files();
}
};
typedef pdf::Renderer MainRenderer;
class MutedRenderer: public pdf::Renderer
{
protected:
std::unique_ptr<std::ostringstream> text_comments;
std::vector<sexpr::Ref> annotations;
const ComponentList &page_files;
bool skipped_elements;
void add_text_comment(int ox, int oy, int dx, int dy, int x, int y, int w, int h, const Unicode *unistr, int len)
{
while (len > 0 && *unistr == ' ')
{
unistr++;
len--;
}
if (len == 0)
return;
*(this->text_comments)
<< std::dec << std::noshowpos
<< "\x01 \x02 " /* special characters will be replaced later */
<< ox << ":" << oy << " "
<< dx << ":" << dy << " "
<< w << "\x03" << h << std::showpos << x << y << " "
<< "("
<< std::oct;
for (; len > 0; len--, unistr++)
{
if (*unistr < 0x20 || *unistr == ')' || *unistr == '\\')
*(this->text_comments) << "\\" << std::setw(3) << static_cast<unsigned int>(*unistr);
else
pdf::write_as_utf8(*(this->text_comments), *unistr);
}
*(this->text_comments) << ")" << std::endl;
}
public:
bool needNonText()
{
return !config.no_render;
}
void drawImageMask(pdf::gfx::State *state, pdf::Object *object, pdf::Stream *stream, int width, int height,
bool invert, bool interpolate, bool inline_image)
{
this->skipped_elements = true;
return;
}
#if POPPLER_VERSION >= 8200
void drawImage(pdf::gfx::State *state, pdf::Object *object, pdf::Stream *stream, int width, int height,
pdf::gfx::ImageColorMap *color_map, bool interpolate, const int *mask_colors, bool inline_image)
#else
void drawImage(pdf::gfx::State *state, pdf::Object *object, pdf::Stream *stream, int width, int height,
pdf::gfx::ImageColorMap *color_map, bool interpolate, int *mask_colors, bool inline_image)
#endif
{
if (is_foreground_color_map(color_map) || config.no_render)
{
this->skipped_elements = true;
return;
}
Renderer::drawImage(state, object, stream, width, height, color_map,
interpolate, mask_colors, inline_image);
}
void drawMaskedImage(pdf::gfx::State *state, pdf::Object *object, pdf::Stream *stream, int width, int height,
pdf::gfx::ImageColorMap *color_map, bool interpolate,
pdf::Stream *mask_stream, int mask_width, int mask_height, bool mask_invert, bool mask_interpolate)
{
if (is_foreground_color_map(color_map) || config.no_render)
{
this->skipped_elements = true;
return;
}
Renderer::drawMaskedImage(state, object, stream, width, height,
color_map, interpolate,
mask_stream, mask_width, mask_height, mask_invert, mask_interpolate);
}
void drawSoftMaskedImage(pdf::gfx::State *state, pdf::Object *object, pdf::Stream *stream,
int width, int height, pdf::gfx::ImageColorMap *color_map, bool interpolate,
pdf::Stream *mask_stream, int mask_width, int mask_height,
pdf::gfx::ImageColorMap *mask_color_map, bool mask_interpolate)
{
if (is_foreground_color_map(color_map) || config.no_render)
{
this->skipped_elements = true;
return;
}
Renderer::drawSoftMaskedImage(state, object, stream, width, height,
color_map, interpolate,
mask_stream, mask_width, mask_height, mask_color_map, mask_interpolate);
}
bool interpretType3Chars() { return false; }
#if POPPLER_VERSION >= 8200
void drawChar(pdf::gfx::State *state, double x, double y, double dx, double dy, double origin_x, double origin_y,
CharCode code, int n_bytes, const Unicode *unistr, int length)
#else
void drawChar(pdf::gfx::State *state, double x, double y, double dx, double dy, double origin_x, double origin_y,
CharCode code, int n_bytes, Unicode *unistr, int length)
#endif
{
double pox, poy, pdx, pdy, px, py, pw, ph;
x -= origin_x; y -= origin_y;
state->transform(x, y, &pox, &poy);
state->transformDelta(dx, dy, &pdx, &pdy);
int old_render = state->getRender();
/* Setting the following rendering mode disallows drawing text, but allows
* fonts to be set up properly nevertheless:
*/
state->setRender(0x103);
this->skipped_elements = true;
this->Renderer::drawChar(state, x, y, dx, dy, origin_x, origin_y, code, n_bytes, unistr, length);
state->setRender(old_render);
pdf::splash::Font *font = this->getCurrentFont();
pdf::splash::GlyphBitmap glyph;
px = pox; py = poy;
if (pdf::get_glyph(this->getSplash(), font, pox, poy, code, &glyph))
{
px -= glyph.x;
py -= glyph.y;
pw = glyph.w;
ph = glyph.h;
}
else
{
/* Ideally, this should never happen. Some heuristics is required to
* determine character width/height: */
pw = pdx; ph = pdy;
double font_size = state->getTransformedFontSize();
if (pw * 4.0 < font_size)
pw = font_size;
if (ph * 4.0 < font_size)
ph = font_size;
py -= ph;
}
pw = std::max(pw, 1.0);
ph = std::max(ph, 1.0);
if (config.text_crop)
{
int bitmap_width = this->getBitmapWidth();
int bitmap_height = this->getBitmapHeight();
if (px + pw < 0 || py + ph < 0 || px >= bitmap_width || py >= bitmap_height)
return;
}
std::unique_ptr<pdf::NFKC> nfkc;
if (config.text_nfkc)
nfkc.reset(new pdf::FullNFKC(unistr, length));
else
nfkc.reset(new pdf::MinimalNFKC(unistr, length));
add_text_comment(
static_cast<int>(pox),
static_cast<int>(poy),
static_cast<int>(pdx),
static_cast<int>(pdy),
static_cast<int>(px),
static_cast<int>(py),
static_cast<int>(pw),
static_cast<int>(ph),
*nfkc, nfkc->length()
);
}
void draw_link(pdf::link::Link *link, const std::string &border_color)
{
if (!config.hyperlinks.extract)
return;
sexpr::Guard guard;
double x1, y1, x2, y2;
pdf::link::Action *link_action = link->getAction();
if (link_action == nullptr)
{
debug(1) << _("Warning: Unable to convert link without an action") << std::endl;
return;
}
std::string uri;
link->getRect(&x1, &y1, &x2, &y2);
switch (link_action->getKind())
{
case actionURI:
#if POPPLER_VERSION >= 8600
uri = dynamic_cast<pdf::link::URI*>(link_action)->getURI();
#else
uri += pdf::get_c_string(dynamic_cast<pdf::link::URI*>(link_action)->getURI());
#endif
break;
case actionGoTo:
{
int page;
try
{
page = get_page_for_goto_link(dynamic_cast<pdf::link::GoTo*>(link_action), this->catalog);
}
catch (const NoLinkDestination &ex)
{
debug(1) << string_printf(_("Warning: %s"), ex.what()) << std::endl;
return;
}
std::ostringstream strstream;
strstream << "#" << this->page_files.get_file_name(page);
uri = strstream.str();
break;
}
case actionGoToR:
debug(1) << _("Warning: Unable to convert link with a remote go-to action") << std::endl;
return;
case actionNamed:
debug(1) << _("Warning: Unable to convert link with a named action") << std::endl;
return;
case actionLaunch:
debug(1) << _("Warning: Unable to convert link with a launch action") << std::endl;
return;
case actionMovie:
case actionSound:
case actionRendition:
debug(1) << _("Warning: Unable to convert link with a multimedia action") << std::endl;
return;
case actionJavaScript:
debug(1) << _("Warning: Unable to convert link with a JavaScript action") << std::endl;
return;
case actionOCGState:
// L10N: OCG stands for “Optional Content Group” (see PDF Reference v1.7, §4.10.1)
debug(1) << _("Warning: Unable to convert link with a set-OCG-state action") << std::endl;
return;
#if POPPLER_VERSION >= 6400
case actionHide:
debug(1) << _("Warning: Unable to convert link with a hide action") << std::endl;
return;
#endif
#if POPPLER_VERSION >= 8900
case actionResetForm:
debug(1) << _("Warning: Unable to convert link with a reset-form action") << std::endl;
return;
#endif
case actionUnknown:
default:
debug(1) << _("Warning: Unknown link action") << std::endl;
return;
}
int x, y, w, h;
this->cvtUserToDev(x1, y1, &x, &y);
this->cvtUserToDev(x2, y2, &w, &h);
w -= x;
h = y - h;
y = this->getBitmapHeight() - y;
static sexpr::Ref symbol_xor = sexpr::symbol("xor");
static sexpr::Ref symbol_border = sexpr::symbol("border");
static sexpr::Ref symbol_rect = sexpr::symbol("rect");
static sexpr::Ref symbol_maparea = sexpr::symbol("maparea");
sexpr::Ref expr = sexpr::nil;
if (config.hyperlinks.border_always_visible)
{
static sexpr::Ref symbol_border_avis = sexpr::symbol("border_avis");
sexpr::Ref item = sexpr::cons(sexpr::symbol("border_avis"), sexpr::nil);
expr = sexpr::cons(item, expr);
}
if (config.hyperlinks.border_color.length() > 0)
{
static sexpr::Ref symbol_border = sexpr::symbol("border");
sexpr::Ref item = sexpr::cons(sexpr::symbol(config.hyperlinks.border_color), sexpr::nil);
item = sexpr::cons(symbol_border, item);
expr = sexpr::cons(item, expr);
}
else
{
sexpr::Ref bexpr = sexpr::nil;
if (border_color.empty())
bexpr = sexpr::cons(symbol_xor, bexpr);
else
{
bexpr = sexpr::cons(sexpr::symbol(border_color), bexpr);
bexpr = sexpr::cons(symbol_border, bexpr);
}
expr = sexpr::cons(bexpr, expr);
}
{
sexpr::Ref rexpr = sexpr::nil;
rexpr = sexpr::cons(sexpr::integer(h), rexpr);
rexpr = sexpr::cons(sexpr::integer(w), rexpr);
rexpr = sexpr::cons(sexpr::integer(y), rexpr);
rexpr = sexpr::cons(sexpr::integer(x), rexpr);
rexpr = sexpr::cons(symbol_rect, rexpr);
expr = sexpr::cons(rexpr, expr);
}
expr = sexpr::cons(sexpr::empty_string, expr);
expr = sexpr::cons(sexpr::string(uri), expr);
expr = sexpr::cons(symbol_maparea, expr);
annotations.push_back(expr);
}
bool useDrawChar()
{
return true;
}
void stroke(pdf::gfx::State *state)
{
this->skipped_elements = true;
}
void fill(pdf::gfx::State *state)
{
if (config.no_render)
{
this->skipped_elements = true;
return;
}
pdf::splash::Path path;
this->convert_path(state, path);
double area = pdf::get_path_area(path);
if (area / this->getBitmapHeight() / this->getBitmapWidth() >= 0.8)
Renderer::fill(state);
else
this->skipped_elements = true;
}
void eoFill(pdf::gfx::State *state)
{
this->fill(state);
}
MutedRenderer(pdf::splash::Color &paper_color, bool monochrome, const ComponentList &page_files)
: Renderer(paper_color, monochrome), page_files(page_files)
{
this->clear();
}
const std::vector<sexpr::Ref> &get_annotations() const
{
return annotations;
}
void clear_annotations()
{
annotations.clear();
}
const std::string get_texts() const
{
std::string texts = this->text_comments->str();
if (config.text_filter_command_line.length() > 0)
texts = Command::filter(config.text_filter_command_line, texts);
for (char &c : texts)
switch (c)
{
case '\x01':
c = '#'; break;
case '\x02':
c = 'T'; break;
case '\x03':
c = 'x'; break;
}
return texts;
}
void clear_texts()
{
this->text_comments.reset(new std::ostringstream);
*(this->text_comments) << std::setfill('0');
}
void clear()
{
this->skipped_elements = 0;
this->clear_texts();
this->clear_annotations();
}
bool has_skipped_elements()
{
return this->skipped_elements;
}
};
class BookmarkError : public std::runtime_error
{
public:
explicit BookmarkError(const std::string &message)
: std::runtime_error(message)
{ }
};
class NoPageForBookmark : public BookmarkError
{
public:
explicit NoPageForBookmark()
: BookmarkError(_("No page for a bookmark"))
{ }
};
class NoTitleForBookmark : public BookmarkError
{
public:
NoTitleForBookmark()
: BookmarkError(_("No title for a bookmark"))
{ }
};
static const int pdf_outline_max_depth = 0x100;
static void pdf_outline_to_djvu_outline(pdf::Object *node, pdf::Catalog *catalog,
djvu::OutlineBase &djvu_outline, const ComponentList &page_files,
int depth)
{
if (depth > pdf_outline_max_depth)
/* DjVu specification puts no limit on outline depth,
* but we want to avoid stack overflow because of very deep recursion. */
throw djvu::OutlineError();
pdf::Object current, next;
if (!pdf::dict_lookup(node, "First", ¤t)->isDict())
return;
while (current.isDict())
{
try
{
std::string title_str;
{
pdf::Object title;
if (!pdf::dict_lookup(current, "Title", &title)->isString())
throw NoTitleForBookmark();
title_str = pdf::string_as_utf8(title);
}
int page;
{
pdf::Object destination;
std::unique_ptr<pdf::link::Action> link_action;
if (!pdf::dict_lookup(current, "Dest", &destination)->isNull())
{
#if POPPLER_VERSION >= 8600
link_action = pdf::link::Action::parseDest(&destination);
#else
link_action.reset(pdf::link::Action::parseDest(&destination));
#endif
}
else if (!pdf::dict_lookup(current, "A", &destination)->isNull())
{
#if POPPLER_VERSION >= 8600
link_action = pdf::link::Action::parseAction(&destination);
#else
link_action.reset(pdf::link::Action::parseAction(&destination));
#endif
}
else
throw NoPageForBookmark();
if (link_action.get() == nullptr || link_action->getKind() != actionGoTo)
throw NoPageForBookmark();
try
{
page = get_page_for_goto_link(
dynamic_cast<pdf::link::GoTo*>(link_action.get()),
catalog
);
}
catch (const NoLinkDestination &)
{
throw NoPageForBookmark();
}
}
{
djvu::OutlineItem &djvu_outline_item = djvu_outline.add(
title_str,
std::string("#") + page_files.get_file_name(page)
);
pdf_outline_to_djvu_outline(¤t, catalog, djvu_outline_item, page_files, depth + 1);
}
}
catch (const BookmarkError &ex)
{
debug(1) << string_printf(_("Warning: %s"), ex.what()) << std::endl;
}
pdf::dict_lookup(current, "Next", &next);
current = std::move(next);
}
}
static void pdf_outline_to_djvu_outline(pdf::Document &doc, djvu::Outline &djvu_outline,
const ComponentList &page_files)
/* Convert the PDF outline to DjVu outline.
*
* Return ``true`` if the outline exist and is non-empty.
* Return ``false`` otherwise.
*/
{
pdf::Catalog *catalog = doc.getCatalog();
pdf::Object *pdf_outline = catalog->getOutline();
if (!pdf_outline->isDict())
return;
pdf_outline_to_djvu_outline(pdf_outline, catalog, djvu_outline, page_files, 0);
}
static void add_meta_string(const char *key, const std::string &value, std::ostream &stream)
{
sexpr::Ref expr = sexpr::string(value);
stream << key << "\t" << expr << std::endl;
}
static void add_meta_date(const char *key, const pdf::Timestamp &value, std::ostream &stream)
{
try
{
sexpr::Ref sexpr = sexpr::string(value.format(' '));
stream << key << "\t" << sexpr << std::endl;
}
catch (const pdf::Timestamp::Invalid &)
{
debug(1) << string_printf(_("Warning: metadata[%s] is not a valid date"), key) << std::endl;
}
}
static void pdf_metadata_to_djvu_metadata(const pdf::Metadata &metadata, std::ostream &stream)
{
metadata.iterate<std::ostream>(add_meta_string, add_meta_date, stream);
}
class TemporaryComponentList : public ComponentList
{
private:
TemporaryComponentList(const TemporaryComponentList&) = delete;
TemporaryComponentList& operator=(const TemporaryComponentList&) = delete;
protected:
std::unique_ptr<const TemporaryDirectory> directory;
std::unique_ptr<TemporaryFile> shared_ant_file;
virtual File *create_file(const std::string &page_id)
{
return new TemporaryFile(*this->directory, page_id);
}
public:
explicit TemporaryComponentList(int n, const PageMap &page_map)
: ComponentList(n, page_map),
directory(new TemporaryDirectory()),
shared_ant_file(new TemporaryFile(*directory, djvu::shared_ant_file_name))
{
shared_ant_file->write("AT&TFORM\0\0\0\4DJVI", 16);
shared_ant_file->close();
}
virtual ~TemporaryComponentList()
{
this->clean_files();
}
};
class IndirectComponentList : public ComponentList
{
private:
IndirectComponentList(const IndirectComponentList&) = delete;
IndirectComponentList& operator=(const IndirectComponentList&) = delete;
protected:
const Directory &directory;
virtual File *create_file(const std::string &page_id)
{
return new File(this->directory, page_id);
}
public:
IndirectComponentList(int n, const PageMap &page_map, const Directory &directory)
: ComponentList(n, page_map), directory(directory)
{ }
};
class DjVuCommand : public Command
{
protected:
static std::string dir_name;
static std::string full_path(const std::string &base_name)
{
return DjVuCommand::dir_name + "/" + base_name;
}
public:
explicit DjVuCommand(const std::string &base_name)
: Command(full_path(base_name))
{ }
};
#if WIN32
std::string DjVuCommand::dir_name(program_dir);
#else
std::string DjVuCommand::dir_name(paths::djvulibre_bindir);
#endif
class DuplicatePage : public std::runtime_error
{
public:
explicit DuplicatePage(int n)
: std::runtime_error(string_printf(_("Duplicate page: %d"), n))
{ }
};
class DjVm
{
protected:
std::set<std::string> known_ids;
class DuplicateId : public std::runtime_error
{
public:
explicit DuplicateId(const std::string &id)
: std::runtime_error(string_printf(_("Duplicate page identifier: %s"), id.c_str()))
{ }
};
void remember(const Component &component);
public:
virtual void add(const Component &component) = 0;
virtual void commit() = 0;
DjVm &operator <<(const Component &component)
{
this->add(component);
return *this;
}
virtual void set_outline(const djvu::Outline &outline) = 0;
virtual void set_metadata(File &metadata_sed_file) = 0;
virtual ~DjVm() { /* just to silence compilers */ }
};
void DjVm::remember(const Component &component)
{
std::string id;
id = component.get_basename();
if (this->known_ids.count(id) > 0)
throw DuplicateId(id);
this->known_ids.insert(id);
}
class IndirectDjVm;
class BundledDjVm : public DjVm
{
protected:
size_t size;
File &output_file;
DjVuCommand converter;
std::unique_ptr<IndirectDjVm> indirect_djvm;
std::unique_ptr<TemporaryFile> index_file;
public:
explicit BundledDjVm(File &output_file)
: size(0),
output_file(output_file),
converter("djvmcvt")
{ }
~BundledDjVm()
{ }
virtual void add(const Component &component);
virtual void set_outline(const djvu::Outline &outline);
virtual void set_metadata(File &metadata_sed_file);
virtual void commit();
};
class IndirectDjVm : public DjVm
{
protected:
File &index_file;
std::vector<Component> components;
bool needs_shared_ant;
std::unique_ptr<std::ostringstream> outline_stream;
class UnexpectedDjvuSedOutput : public std::runtime_error
{
public:
UnexpectedDjvuSedOutput()
: std::runtime_error(_("Unexpected output from djvused"))
{ }
};
void create_bare(const std::vector<Component> &components);
void create(const std::vector<Component> &components, bool bare=false);
public:
explicit IndirectDjVm(File &index_file)
: index_file(index_file),
needs_shared_ant(false)
{ }
virtual ~IndirectDjVm()
{ }
virtual void add(const Component &component)
{
this->remember(component);
this->components.push_back(component);
}
virtual void set_outline(const djvu::Outline &outline)
{
if (!outline)
{
this->outline_stream.reset(nullptr);
return;
}
this->outline_stream.reset(new std::ostringstream);
*this->outline_stream << outline;
}
virtual void set_metadata(File &metadata_sed_file)
{
size_t size = this->components.size();
{
/* Using ``djvused`` to add shared annotations to an indirect multi-page
* document could be unacceptably slow:
* https://sourceforge.net/p/djvu/bugs/100/
*
* We need to work around this bug.
*/
debug(3) << _("setting metadata with `djvused`") << std::endl;
std::vector<Component> dummy_components;
TemporaryFile dummy_sed_file;