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#include "option_manager.hh"
#include "assert.hh"
#include "flags.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) const
{
kak_assert(not contains(m_watchers, &watcher));
m_watchers.push_back(&watcher);
}
void OptionManager::unregister_watcher(OptionManagerWatcher& watcher) const
{
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(format("option not found: '{}'. Use declare-option first", name)) {}
};
Option& OptionManager::get_local_option(StringView name)
{
auto it = m_options.find(name);
if (it != m_options.end())
return *(it->value);
else if (m_parent)
{
auto* clone = (*m_parent)[name].clone(*this);
return *m_options.insert({clone->name(), std::unique_ptr<Option>{clone}});
}
else
throw option_not_found(name);
}
Option& OptionManager::operator[](StringView name)
{
auto it = m_options.find(name);
if (it != m_options.end())
return *it->value;
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
if (m_options.contains(name))
{
m_options.erase(name);
on_option_changed((*m_parent)[name]);
}
}
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 m_options.contains(option.name()))
return;
// The watcher list might get mutated during calls to on_option_changed
auto watchers = m_watchers;
for (auto* watcher : watchers)
{
if (contains(m_watchers, watcher)) // make sure this watcher is still alive
watcher->on_option_changed(option);
}
}
CandidateList OptionsRegistry::complete_option_name(StringView prefix,
ByteCount cursor_pos) const
{
using OptionPtr = std::unique_ptr<const OptionDesc>;
return complete(prefix, cursor_pos, m_descs |
filter([](const OptionPtr& desc)
{ return not (desc->flags() & OptionFlags::Hidden); }) |
transform(&OptionDesc::name));
}
}
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