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#include "backgrounds.hh"
#include "configuration.hh"
#include <boost/filesystem.hpp>
#include <algorithm>
#include <iostream>
#include <sstream>
#include <stdexcept>
#include <random>
#include <regex>
void Backgrounds::reload() {
if (m_loading) return;
// Run loading thread
m_loading = true;
m_thread = std::make_unique<std::thread>([this] { reload_internal(); });
}
void Backgrounds::reload_internal() {
{ // Remove old ones
std::lock_guard<std::mutex> l(m_mutex);
m_bgs.clear();
m_dirty = true;
}
// Go through the background paths
Paths paths = getPaths();
for (auto it = paths.begin(); m_loading && it != paths.end(); ++it) {
if (!m_loading) break;
*it /= "backgrounds";
if (!fs::is_directory(*it)) { std::clog << "backgrounds/info: >>> Not scanning for backgrounds: " << *it << " (no such directory)" << std::endl; continue; }
std::clog << "backgrounds/info: >>> Scanning " << *it << " (for backgrounds)" << std::endl;
size_t count = m_bgs.size();
reload_internal(*it); // Scan the found folder
size_t diff = m_bgs.size() - count;
if (diff > 0 && m_loading) std::clog << "backgrounds/info: " << diff << " backgrounds loaded" << std::endl;
}
m_loading = false;
{ // Randomize the order
std::lock_guard<std::mutex> l(m_mutex);
std::shuffle(m_bgs.begin(), m_bgs.end(), std::mt19937(std::random_device()()));
m_dirty = false;
m_bgiter = 0;
}
}
void Backgrounds::reload_internal(fs::path const& parent) {
if (std::distance(parent.begin(), parent.end()) > 20) { std::clog << "backgrounds/info: >>> Not scanning: " << parent.string() << " (maximum depth reached, possibly due to cyclic symlinks)" << std::endl; return; }
try {
// Find suitable file formats
std::regex expression(R"(\.(png|jpeg|jpg|svg)$)", std::regex_constants::icase);
for (fs::directory_iterator dirIt(parent), dirEnd; m_loading && dirIt != dirEnd; ++dirIt) {
fs::path p = dirIt->path();
if (fs::is_directory(p)) { reload_internal(p); continue; }
std::string name = p.filename().string(); // File basename
std::string path = p.string(); // Path without filename
path.erase(path.size() - name.size());
if (!regex_search(name, expression)) continue;
{
std::lock_guard<std::mutex> l(m_mutex);
m_bgs.push_back(path + name); // Add the background
m_dirty = true;
}
}
} catch (std::exception const& e) {
std::cout << "Error accessing " << parent << std::endl;
}
}
/// Get a random background
std::string Backgrounds::getRandom() {
if (m_bgs.empty()) throw std::runtime_error("No random backgrounds available");
// This relies on that the bgs are in random order
return m_bgs.at((++m_bgiter) % m_bgs.size());
}
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