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/*
Copyright (C) 2025 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 "dcpomatic_assert.h"
#include "layout_closed_captions.h"
#include "string_text.h"
#include "util.h"
using std::string;
using std::vector;
using boost::optional;
vector<string>
layout_closed_captions(vector<StringText> text)
{
auto from_top = [](StringText const & c)
{
switch (c.v_align()) {
case dcp::VAlign::TOP:
return c.v_position();
case dcp::VAlign::CENTER:
return c.v_position() + 0.5f;
case dcp::VAlign::BOTTOM:
return 1.0f - c.v_position();
}
DCPOMATIC_ASSERT(false);
return 0.f;
};
std::sort(text.begin(), text.end(), [&](StringText const & a, StringText const & b) { return from_top(a) < from_top(b); });
vector<string> strings;
string current;
optional<float> last_position;
for (auto const& t: text) {
if (last_position && !text_positions_close(*last_position, t.v_position()) && !current.empty()) {
strings.push_back(current);
current = "";
}
current += t.text();
last_position = t.v_position();
}
if (!current.empty()) {
strings.push_back(current);
}
return strings;
}
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