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/*
Copyright (C) 2014-2021 Carl Hetherington <cth@carlh.net>
This file is part of DCP-o-matic.
DCP-o-matic is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
DCP-o-matic 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.
You should have received a copy of the GNU General Public License
along with DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
*/
#include "film.h"
#include "font.h"
#include "font_config.h"
#include "string_text_file.h"
#include "string_text_file_content.h"
#include "text_content.h"
#include "util.h"
#include <dcp/raw_convert.h>
#include <fontconfig/fontconfig.h>
#include <libxml++/libxml++.h>
#include <iostream>
#include "i18n.h"
using std::cout;
using std::list;
using std::make_shared;
using std::shared_ptr;
using std::string;
using boost::optional;
using dcp::raw_convert;
using namespace dcpomatic;
StringTextFileContent::StringTextFileContent (boost::filesystem::path path)
: Content (path)
{
text.push_back (make_shared<TextContent>(this, TextType::OPEN_SUBTITLE, TextType::UNKNOWN));
}
StringTextFileContent::StringTextFileContent (cxml::ConstNodePtr node, int version, list<string>& notes)
: Content (node)
, _length (node->number_child<ContentTime::Type>("Length"))
{
text = TextContent::from_xml (this, node, version, notes);
}
static
std::set<string>
font_names(StringTextFile const& string_text_file)
{
std::set<string> names;
for (auto const& subtitle: string_text_file.subtitles()) {
for (auto const& line: subtitle.lines) {
for (auto const& block: line.blocks) {
names.insert(block.font.get_value_or(""));
}
}
}
return names;
}
void
StringTextFileContent::examine (shared_ptr<const Film> film, shared_ptr<Job> job)
{
Content::examine (film, job);
StringTextFile file (shared_from_this());
only_text()->clear_fonts();
/* Default to turning these subtitles on */
only_text()->set_use (true);
for (auto name: font_names(file)) {
optional<boost::filesystem::path> path;
if (!name.empty()) {
path = FontConfig::instance()->system_font_with_name(name);
}
if (path) {
only_text()->add_font(make_shared<Font>(name, *path));
} else {
only_text()->add_font(make_shared<Font>(name));
}
}
boost::mutex::scoped_lock lm (_mutex);
_length = file.length();
}
string
StringTextFileContent::summary () const
{
return path_summary() + " " + _("[subtitles]");
}
string
StringTextFileContent::technical_summary () const
{
return Content::technical_summary() + " - " + _("Text subtitles");
}
void
StringTextFileContent::as_xml (xmlpp::Node* node, bool with_paths) const
{
node->add_child("Type")->add_child_text("TextSubtitle");
Content::as_xml (node, with_paths);
if (only_text()) {
only_text()->as_xml(node);
}
node->add_child("Length")->add_child_text(raw_convert<string>(_length.get ()));
}
DCPTime
StringTextFileContent::full_length (shared_ptr<const Film> film) const
{
FrameRateChange const frc (film, shared_from_this());
return DCPTime (_length, frc);
}
DCPTime
StringTextFileContent::approximate_length () const
{
return DCPTime (_length, FrameRateChange());
}
string
StringTextFileContent::identifier () const
{
auto s = Content::identifier ();
s += "_" + only_text()->identifier();
return s;
}
/** In 5a820bb8fae34591be5ac6d19a73461b9dab532a there were some changes to subtitle font management.
*
* With StringTextFileContent we used to write a <Font> tag to the metadata with the id "font". Users
* could then set a font file that content should use, and (with some luck) it would end up in the DCP
* that way.
*
* After the changes we write a <Font> tag for every different font "id" (i.e. name) found in the source
* file (including a <Font> with id "" in the .srt case where there are no font names).
*
* However, this meant that making DCPs from old projects would fail, as the new code would see a font name
* in the source, then lookup a Font object for it from the Content, and fail in doing so (since the content
* only contains a font called "font").
*
* To put it another way: after the changes, the code expects that any font ID (i.e. name) used in some content
* will have a <Font> in the metadata and so a Font object in the TextContent. Without that, making DCPs fails.
*
* To work around this problem, this check_font_ids() is called for all subtitle content written by DoM versions
* before 2.16.14. We find all the font IDs in the content and map them all to the "legacy" font name (if there
* is one). This is more-or-less a re-examine()-ation, except that we try to preserve any settings that
* the user had previously set up.
*
* See #2271.
*/
void
StringTextFileContent::check_font_ids()
{
StringTextFile file (shared_from_this());
auto names = font_names(file);
auto content = only_text();
optional<boost::filesystem::path> legacy_font_file;
if (auto legacy_font = content->get_font("font")) {
legacy_font_file = legacy_font->file();
}
for (auto name: names) {
if (!content->get_font(name)) {
if (legacy_font_file) {
content->add_font(make_shared<Font>(name, *legacy_font_file));
} else {
content->add_font(make_shared<Font>(name));
}
}
}
}
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