131 lines
3.4 KiB
C++
131 lines
3.4 KiB
C++
#include "option_manager.hh"
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#include "assert.hh"
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namespace Kakoune
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{
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OptionDesc::OptionDesc(String name, String docstring, OptionFlags flags)
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: m_name(std::move(name)), m_docstring(std::move(docstring)),
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m_flags(flags) {}
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Option::Option(const OptionDesc& desc, OptionManager& manager)
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: m_manager(manager), m_desc(desc) {}
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OptionManager::OptionManager(OptionManager& parent)
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: m_parent(&parent)
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{
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parent.register_watcher(*this);
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}
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OptionManager::~OptionManager()
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{
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if (m_parent)
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m_parent->unregister_watcher(*this);
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kak_assert(m_watchers.empty());
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}
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void OptionManager::register_watcher(OptionManagerWatcher& watcher) const
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{
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kak_assert(not contains(m_watchers, &watcher));
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m_watchers.push_back(&watcher);
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}
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void OptionManager::unregister_watcher(OptionManagerWatcher& watcher) const
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{
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auto it = find(m_watchers.begin(), m_watchers.end(), &watcher);
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kak_assert(it != m_watchers.end());
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m_watchers.erase(it);
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}
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struct option_not_found : public runtime_error
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{
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option_not_found(StringView name)
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: runtime_error("option not found: " + name) {}
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};
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Option& OptionManager::get_local_option(StringView name)
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{
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auto it = find_option(m_options, name);
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if (it != m_options.end())
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return **it;
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else if (m_parent)
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{
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m_options.emplace_back((*m_parent)[name].clone(*this));
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return *m_options.back();
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}
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else
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throw option_not_found(name);
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}
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Option& OptionManager::operator[](StringView name)
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{
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auto it = find_option(m_options, name);
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if (it != m_options.end())
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return **it;
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else if (m_parent)
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return (*m_parent)[name];
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else
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throw option_not_found(name);
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}
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const Option& OptionManager::operator[](StringView name) const
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{
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return const_cast<OptionManager&>(*this)[name];
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}
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void OptionManager::unset_option(StringView name)
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{
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kak_assert(m_parent); // cannot unset option on global manager
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auto it = find_option(m_options, name);
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if (it != m_options.end())
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{
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m_options.erase(it);
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on_option_changed((*m_parent)[name]);
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}
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}
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OptionManager::OptionList OptionManager::flatten_options() const
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{
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OptionList res = m_parent ? m_parent->flatten_options() : OptionList{};
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for (auto& option : m_options)
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{
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auto it = find_option(res, option->name());
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if (it != res.end())
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*it = option.get();
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else
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res.emplace_back(option.get());
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}
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return res;
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}
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void OptionManager::on_option_changed(const Option& option)
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{
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// if parent option changed, but we overrided it, it's like nothing happened
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if (&option.manager() != this and
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find_option(m_options, option.name()) != m_options.end())
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return;
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// The watcher list might get mutated during calls to on_option_changed
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auto watchers = m_watchers;
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for (auto* watcher : watchers)
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{
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if (contains(m_watchers, watcher)) // make sure this watcher is still alive
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watcher->on_option_changed(option);
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}
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}
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CandidateList OptionsRegistry::complete_option_name(StringView prefix,
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ByteCount cursor_pos) const
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{
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using OptionPtr = std::unique_ptr<const OptionDesc>;
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return complete(prefix, cursor_pos, m_descs |
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filter([](const OptionPtr& desc)
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{ return not (desc->flags() & OptionFlags::Hidden); }) |
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transform(std::mem_fn(&OptionDesc::name)));
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}
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}
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