Method LoadAllFileFilters

Src/FileFilterHelper.cpp:692–722

* @brief Load any known file filters * @todo Preserve filter selection? How? */

 * @todo Preserve filter selection? How?
 */
void FileFilterHelper::LoadAllFileFilters()
{
	// First delete existing filters
	m_fileFilterMgr->DeleteAllFilters();

	std::vector<String> folders;
	auto addUnique = [&](const String& path)
	{
		if (path.empty())
			return;
		for (const auto& f : folders)
		{
			if (strutils::compare_nocase(f, path) == 0)
				return;
		}
		folders.push_back(path);
	};
	// Program application directory
	m_sGlobalFilterPath = paths::ConcatPath(env::GetProgPath(), _T("Filters"));
	addUnique(m_sGlobalFilterPath);
	addUnique(paths::ConcatPath(env::GetAppDataPath(), _T("WinMerge\\Filters")));
	addUnique(paths::ConcatPath(env::GetMyDocuments(), _T("WinMerge\\Filters")));
	if (!m_sUserSelFilterPath.empty())
		addUnique(m_sUserSelFilterPath);

	String pattern(_T("*"));
	pattern += FileFilterExt;

	for (const auto& folder : folders)
		LoadFileFilterDirPattern(folder, pattern);
}

/**
 * @brief Return path to global filters (& create if needed), or empty if cannot create