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#include "option_manager.hh"
#include "assert.hh"
namespace Kakoune
{
OptionDesc::OptionDesc(String name, String docstring, OptionFlags flags)
: m_name(std::move(name)), m_docstring(std::move(docstring)),
m_flags(flags) {}
Option::Option(const OptionDesc& desc, OptionManager& manager)
: m_manager(manager), m_desc(desc) {}
OptionManager::OptionManager(OptionManager& parent)
: m_parent(&parent)
{
parent.register_watcher(*this);
}
OptionManager::~OptionManager()
{
if (m_parent)
m_parent->unregister_watcher(*this);
kak_assert(m_watchers.empty());
}
void OptionManager::register_watcher(OptionManagerWatcher& watcher)
{
kak_assert(not contains(m_watchers, &watcher));
m_watchers.push_back(&watcher);
}
void OptionManager::unregister_watcher(OptionManagerWatcher& watcher)
{
auto it = find(m_watchers.begin(), m_watchers.end(), &watcher);
kak_assert(it != m_watchers.end());
m_watchers.erase(it);
}
struct option_not_found : public runtime_error
{
option_not_found(StringView name)
: runtime_error("option not found: " + name) {}
};
Option& OptionManager::get_local_option(StringView name)
{
auto it = find_option(m_options, name);
if (it != m_options.end())
return **it;
else if (m_parent)
{
m_options.emplace_back((*m_parent)[name].clone(*this));
return *m_options.back();
}
else
throw option_not_found(name);
}
Option& OptionManager::operator[](StringView name)
{
auto it = find_option(m_options, name);
if (it != m_options.end())
return **it;
else if (m_parent)
return (*m_parent)[name];
else
throw option_not_found(name);
}
const Option& OptionManager::operator[](StringView name) const
{
return const_cast<OptionManager&>(*this)[name];
}
void OptionManager::unset_option(StringView name)
{
kak_assert(m_parent); // cannot unset option on global manager
auto it = find_option(m_options, name);
if (it != m_options.end())
{
m_options.erase(it);
on_option_changed((*m_parent)[name]);
}
}
OptionManager::OptionList OptionManager::flatten_options() const
{
OptionList res = m_parent ? m_parent->flatten_options() : OptionList{};
for (auto& option : m_options)
{
auto it = find_option(res, option->name());
if (it != res.end())
*it = option.get();
else
res.emplace_back(option.get());
}
return res;
}
void OptionManager::on_option_changed(const Option& option)
{
// if parent option changed, but we overrided it, it's like nothing happened
if (&option.manager() != this and
find_option(m_options, option.name()) != m_options.end())
return;
for (auto watcher : m_watchers)
watcher->on_option_changed(option);
}
template<typename Container, typename MatchingFunc>
static CandidateList get_matching_names(const Container& options, MatchingFunc func)
{
CandidateList result;
for (auto& option : options)
{
if (option->flags() & OptionFlags::Hidden)
continue;
const auto& name = option->name();
if (func(name))
result.push_back(name);
}
return result;
}
CandidateList OptionsRegistry::complete_option_name(StringView prefix,
ByteCount cursor_pos) const
{
using namespace std::placeholders;
auto real_prefix = prefix.substr(0, cursor_pos);
auto result = get_matching_names(m_descs, std::bind(prefix_match, _1, real_prefix));
if (result.empty())
result = get_matching_names(m_descs, std::bind(subsequence_match, _1, real_prefix));
return result;
}
}
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