94 lines
2.3 KiB
C++
94 lines
2.3 KiB
C++
#ifndef option_manager_hh_INCLUDED
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#define option_manager_hh_INCLUDED
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#include "utils.hh"
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#include "exception.hh"
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#include "completion.hh"
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#include <unordered_map>
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namespace Kakoune
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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(const String& name)
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: runtime_error("option not found: " + name) {}
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};
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String int_to_str(int value);
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class Option
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{
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public:
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Option() {}
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explicit Option(int value) : m_value(int_to_str(value)) {}
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explicit Option(const String& value) : m_value(value) {}
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Option& operator=(int value) { m_value = int_to_str(value); return *this; }
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Option& operator=(const String& value) { m_value = value; return *this; }
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bool operator==(const Option& other) const { return m_value == other.m_value; }
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bool operator!=(const Option& other) const { return m_value != other.m_value; }
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int as_int() const { return str_to_int(m_value); }
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String as_string() const { return m_value; }
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private:
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String m_value;
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};
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class OptionManagerWatcher
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{
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public:
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virtual ~OptionManagerWatcher() {}
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virtual void on_option_changed(const String& name,
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const Option& option) = 0;
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};
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class OptionManager : private OptionManagerWatcher
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{
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public:
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OptionManager(OptionManager& parent);
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~OptionManager();
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const Option& operator[] (const String& name) const;
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void set_option(const String& name, const Option& value);
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CandidateList complete_option_name(const String& prefix,
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ByteCount cursor_pos);
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typedef std::unordered_map<String, Option> OptionMap;
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OptionMap flatten_options() const;
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void register_watcher(OptionManagerWatcher& watcher);
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void unregister_watcher(OptionManagerWatcher& watcher);
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private:
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OptionManager()
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: m_parent(nullptr) {}
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// the only one allowed to construct a root option manager
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friend class GlobalOptionManager;
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OptionMap m_options;
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OptionManager* m_parent;
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void on_option_changed(const String& name,
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const Option& value);
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std::vector<OptionManagerWatcher*> m_watchers;
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};
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class GlobalOptionManager : public OptionManager,
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public Singleton<GlobalOptionManager>
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{
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public:
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GlobalOptionManager();
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};
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}
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#endif // option_manager_hh_INCLUDED
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