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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_time.h"
#include "layout_markers.h"
#include <dcp/types.h>
#include <functional>
#include <iostream>
#include <map>
#include <string>
#include <vector>
#include "i18n.h"
using std::function;
using std::map;
using std::max;
using std::min;
using std::pair;
using std::string;
using std::vector;
using namespace std::placeholders;
vector<MarkerLayoutComponent>
layout_markers(
map<dcp::Marker, dcpomatic::DCPTime> const& markers,
int width_in_pixels,
dcpomatic::DCPTime width_in_time,
int label_to_end_gap,
int outside_label_gap,
function<int (string)> text_width
)
{
float const pixels_per_unit_time = static_cast<float>(width_in_pixels) / width_in_time.get();
auto pixels_between = [&](dcpomatic::DCPTime t1, dcpomatic::DCPTime t2) {
return pixels_per_unit_time * t2.get() - pixels_per_unit_time * t1.get();
};
vector<AllocationRow> allocations;
auto allocate = [&](int x1, int x2) -> int {
int index = 0;
for (auto& row: allocations) {
if (row.allocate(x1, x2)) {
return index;
}
++index;
}
auto row = AllocationRow();
row.allocate(x1, x2);
allocations.push_back(row);
return index;
};
vector<MarkerLayoutComponent> components;
auto layout_pair = [&](string name, pair<dcp::Marker, dcpomatic::DCPTime> start, pair<dcp::Marker, dcpomatic::DCPTime> end) {
auto const width = text_width(name);
int const x1 = floor(pixels_per_unit_time * start.second.get());
int const x2 = ceil(pixels_per_unit_time * end.second.get());
int label_x = 0;
int y = 0;
if (pixels_between(start.second, end.second) <= text_width(name)) {
if (x1 > width_in_pixels / 2) {
label_x = x1 - outside_label_gap - width;
y = allocate(x1 - outside_label_gap - width, x2);
} else {
label_x = x2 + outside_label_gap;
y = allocate(x1, x2 + outside_label_gap + width);
}
} else {
label_x = (x1 + x2 - width) / 2;
y = allocate(x1, x2);
}
components.push_back(MarkerLayoutComponent{MarkerLayoutComponent::Type::LEFT, x1, y, start.first, start.second});
components.push_back(MarkerLayoutComponent{MarkerLayoutComponent::Type::RIGHT, x2, y, end.first, end.second});
components.push_back(MarkerLayoutComponent{MarkerLayoutComponent::Type::LABEL, label_x, width, y, name});
components.push_back(MarkerLayoutComponent{MarkerLayoutComponent::Type::LINE, x1, x2, y});
};
auto layout_left = [&](string name, pair<dcp::Marker, dcpomatic::DCPTime> marker) {
int const x1 = floor(pixels_per_unit_time * marker.second.get());
auto const width = text_width(name);
auto const y = allocate(x1, x1 + label_to_end_gap + width);
components.push_back(MarkerLayoutComponent{MarkerLayoutComponent::Type::LEFT, x1, y, marker.first, marker.second});
components.push_back(MarkerLayoutComponent{MarkerLayoutComponent::Type::LABEL, x1 + label_to_end_gap, width, y, name});
components.push_back(MarkerLayoutComponent{MarkerLayoutComponent::Type::LINE, x1, x1 + label_to_end_gap, y});
};
auto layout_right = [&](string name, pair<dcp::Marker, dcpomatic::DCPTime> marker) {
int const x2 = floor(pixels_per_unit_time * marker.second.get());
auto const width = text_width(name);
auto const y = allocate(x2 - label_to_end_gap - width, x2);
components.push_back(MarkerLayoutComponent{MarkerLayoutComponent::Type::RIGHT, x2, y, marker.first, marker.second});
components.push_back(MarkerLayoutComponent{MarkerLayoutComponent::Type::LABEL, x2 - label_to_end_gap - width, width, y, name});
components.push_back(MarkerLayoutComponent{MarkerLayoutComponent::Type::LINE, x2 - label_to_end_gap, x2, y});
};
auto check_pair = [&](string name, dcp::Marker a, dcp::Marker b) {
auto fa = markers.find(a);
auto fb = markers.find(b);
if (fa != markers.end() && fb != markers.end()) {
layout_pair(name, *fa, *fb);
} else if (fa != markers.end()) {
layout_left(name, *fa);
} else if (fb != markers.end()) {
layout_right(name, *fb);
}
};
// TRANSLATORS: this is an abbreviation for "ratings band", shown next to the pair of markers
// "FFOB" and "LFOB" ({First, Last} Frame of Band)
check_pair(_("RB"), dcp::Marker::FFOB, dcp::Marker::LFOB);
// TRANSLATORS: this is an abbreviation for "title credits", shown next to the pair of markers
// "FFTC" and "LFTC" ({First, Last} Frame of Title Credits)
check_pair(_("TC"), dcp::Marker::FFTC, dcp::Marker::LFTC);
// TRANSLATORS: this is an abbreviation for "intermission", shown next to the pair of markers
// "FFOI" and "LFOI" ({First, Last} Frame of Intermission)
check_pair(_("IN"), dcp::Marker::FFOI, dcp::Marker::LFOI);
// TRANSLATORS: this is an abbreviation for "end credits", shown next to the pair of markers
// "FFEC" and "LFEC" ({First, Last} Frame of End Credits)
check_pair(_("EC"), dcp::Marker::FFEC, dcp::Marker::LFEC);
// TRANSLATORS: this is an abbreviation for "moving credits", shown next to the pair of markers
// "FFMC" and "LFMC" ({First, Last} Frame of Moving Credits)
check_pair(_("MC"), dcp::Marker::FFMC, dcp::Marker::LFMC);
return components;
}
bool
AllocationRow::allocate(int x1, int x2)
{
auto overlaps = [](pair<int, int> a, pair<int, int> b) {
return max(a.first, b.first) <= min(a.second, b.second);
};
if (std::none_of(_allocated.begin(), _allocated.end(), std::bind(overlaps, pair<int, int>{x1, x2}, _1))) {
_allocated.push_back({x1, x2});
return true;
}
return false;
}
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