811 lines
26 KiB
C++
811 lines
26 KiB
C++
#include "input_handler.hh"
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#include "context.hh"
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#include "editor.hh"
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#include "register_manager.hh"
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#include "event_manager.hh"
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#include "utf8.hh"
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#include <unordered_map>
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namespace Kakoune
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{
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extern std::unordered_map<Key, std::function<void (Context& context)>> keymap;
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class InputMode
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{
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public:
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InputMode(InputHandler& input_handler) : m_input_handler(input_handler) {}
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virtual ~InputMode() {}
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InputMode(const InputMode&) = delete;
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InputMode& operator=(const InputMode&) = delete;
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virtual void on_key(const Key& key) = 0;
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Context& context() const { return m_input_handler.context(); }
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using Insertion = InputHandler::Insertion;
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Insertion& last_insert() { return m_input_handler.m_last_insert; }
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protected:
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void reset_normal_mode();
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private:
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InputHandler& m_input_handler;
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};
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namespace InputModes
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{
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static constexpr std::chrono::milliseconds idle_timeout{100};
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class Normal : public InputMode
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{
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public:
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Normal(InputHandler& input_handler)
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: InputMode(input_handler),
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m_idle_timer{Clock::now() + idle_timeout, [this](Timer& timer) {
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context().hooks().run_hook("NormalIdle", "", context());
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}}
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{
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context().hooks().run_hook("NormalBegin", "", context());
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}
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~Normal()
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{
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context().hooks().run_hook("NormalEnd", "", context());
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}
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void on_key(const Key& key) override
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{
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if (key.modifiers == Key::Modifiers::None and isdigit(key.key))
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m_count = m_count * 10 + key.key - '0';
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else
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{
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auto it = keymap.find(key);
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if (it != keymap.end())
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{
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context().numeric_param() = m_count;
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it->second(context());
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}
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m_count = 0;
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}
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context().hooks().run_hook("NormalKey", key_to_str(key), context());
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m_idle_timer.set_next_date(Clock::now() + idle_timeout);
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}
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private:
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int m_count = 0;
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Timer m_idle_timer;
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};
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class LineEditor
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{
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public:
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void handle_key(const Key& key)
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{
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if (key == Key::Left or
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key == Key{Key::Modifiers::Control, 'b'})
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{
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if (m_cursor_pos > 0)
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--m_cursor_pos;
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}
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else if (key == Key::Right or
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key == Key{Key::Modifiers::Control, 'f'})
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{
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if (m_cursor_pos < m_line.char_length())
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++m_cursor_pos;
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}
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else if (key == Key::Home)
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m_cursor_pos = 0;
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else if (key == Key::End)
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m_cursor_pos = m_line.char_length();
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else if (key == Key::Backspace)
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{
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if (m_cursor_pos != 0)
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{
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m_line = m_line.substr(0, m_cursor_pos - 1)
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+ m_line.substr(m_cursor_pos);
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--m_cursor_pos;
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}
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}
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else
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{
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m_line = m_line.substr(0, m_cursor_pos) + codepoint_to_str(key.key)
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+ m_line.substr(m_cursor_pos);
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++m_cursor_pos;
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}
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}
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void insert(const String& str)
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{
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insert_from(m_cursor_pos, str);
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}
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void insert_from(CharCount start, const String& str)
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{
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assert(start <= m_cursor_pos);
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m_line = m_line.substr(0, start) + str
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+ m_line.substr(m_cursor_pos);
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m_cursor_pos = start + str.char_length();
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}
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void reset(String line)
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{
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m_line = std::move(line);
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m_cursor_pos = m_line.char_length();
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}
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const String& line() const { return m_line; }
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CharCount cursor_pos() const { return m_cursor_pos; }
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private:
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CharCount m_cursor_pos = 0;
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String m_line;
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};
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class Menu : public InputMode
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{
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public:
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Menu(InputHandler& input_handler, const memoryview<String>& choices,
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MenuCallback callback)
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: InputMode(input_handler),
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m_callback(callback), m_choices(choices.begin(), choices.end()),
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m_selected(m_choices.begin())
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{
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DisplayCoord menu_pos{ context().ui().dimensions().line, 0_char };
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context().ui().menu_show(choices, menu_pos, MenuStyle::Prompt);
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}
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void on_key(const Key& key) override
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{
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auto match_filter = [this](const String& str) {
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return boost::regex_match(str.begin(), str.end(), m_filter);
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};
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if (key == Key(Key::Modifiers::Control, 'm'))
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{
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context().ui().menu_hide();
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context().ui().print_status("");
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reset_normal_mode();
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int selected = m_selected - m_choices.begin();
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m_callback(selected, MenuEvent::Validate, context());
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return;
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}
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else if (key == Key::Escape or key == Key{ Key::Modifiers::Control, 'c' })
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{
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if (m_edit_filter)
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{
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m_edit_filter = false;
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m_filter = boost::regex(".*");
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m_filter_editor.reset("");
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context().ui().print_status("");
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}
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else
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{
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context().ui().menu_hide();
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reset_normal_mode();
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int selected = m_selected - m_choices.begin();
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m_callback(selected, MenuEvent::Abort, context());
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}
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}
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else if (key == Key::Down or
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key == Key(Key::Modifiers::Control, 'i') or
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key == Key(Key::Modifiers::Control, 'n') or
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key == Key(Key::Modifiers::None, 'j'))
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{
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auto it = std::find_if(m_selected+1, m_choices.end(), match_filter);
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if (it == m_choices.end())
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it = std::find_if(m_choices.begin(), m_selected, match_filter);
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select(it);
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}
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else if (key == Key::Up or
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key == Key::BackTab or
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key == Key(Key::Modifiers::Control, 'p') or
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key == Key(Key::Modifiers::None, 'k'))
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{
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ChoiceList::const_reverse_iterator selected(m_selected+1);
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auto it = std::find_if(selected+1, m_choices.rend(), match_filter);
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if (it == m_choices.rend())
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it = std::find_if(m_choices.rbegin(), selected, match_filter);
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select(it.base()-1);
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}
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else if (key == '/' and not m_edit_filter)
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{
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m_edit_filter = true;
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}
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else if (m_edit_filter)
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{
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m_filter_editor.handle_key(key);
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auto search = ".*" + m_filter_editor.line() + ".*";
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m_filter = boost::regex(search.begin(), search.end());
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auto it = std::find_if(m_selected, m_choices.end(), match_filter);
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if (it == m_choices.end())
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it = std::find_if(m_choices.begin(), m_selected, match_filter);
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select(it);
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}
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if (m_edit_filter)
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context().ui().print_status("/" + m_filter_editor.line(),
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m_filter_editor.cursor_pos() + 1);
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}
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private:
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MenuCallback m_callback;
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using ChoiceList = std::vector<String>;
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const ChoiceList m_choices;
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ChoiceList::const_iterator m_selected;
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void select(ChoiceList::const_iterator it)
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{
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m_selected = it;
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int selected = m_selected - m_choices.begin();
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context().ui().menu_select(selected);
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m_callback(selected, MenuEvent::Select, context());
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}
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boost::regex m_filter = boost::regex(".*");
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bool m_edit_filter = false;
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LineEditor m_filter_editor;
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};
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String common_prefix(const memoryview<String>& strings)
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{
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String res;
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if (strings.empty())
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return res;
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res = strings[0];
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for (auto& str : strings)
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{
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ByteCount len = std::min(res.length(), str.length());
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ByteCount common_len = 0;
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while (common_len < len and str[common_len] == res[common_len])
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++common_len;
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if (common_len != res.length())
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res = res.substr(0, common_len);
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}
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return res;
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}
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class Prompt : public InputMode
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{
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public:
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Prompt(InputHandler& input_handler, const String& prompt,
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Completer completer, PromptCallback callback)
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: InputMode(input_handler), m_prompt(prompt),
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m_completer(completer), m_callback(callback)
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{
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m_history_it = ms_history[m_prompt].end();
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context().ui().print_status(m_prompt, m_prompt.char_length());
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}
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void on_key(const Key& key) override
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{
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std::vector<String>& history = ms_history[m_prompt];
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const String& line = m_line_editor.line();
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if (m_insert_reg)
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{
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String reg = RegisterManager::instance()[key.key].values(context())[0];
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m_line_editor.insert(reg);
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m_insert_reg = false;
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}
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else if (key == Key{Key::Modifiers::Control, 'm'}) // enter
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{
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if (not line.empty())
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{
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std::vector<String>::iterator it;
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while ((it = find(history, line)) != history.end())
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history.erase(it);
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history.push_back(line);
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}
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context().ui().print_status("");
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context().ui().menu_hide();
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reset_normal_mode();
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// call callback after reset_normal_mode so that callback
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// may change the mode
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m_callback(line, PromptEvent::Validate, context());
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return;
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}
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else if (key == Key::Escape or key == Key { Key::Modifiers::Control, 'c' })
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{
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context().ui().print_status("");
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context().ui().menu_hide();
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reset_normal_mode();
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m_callback(line, PromptEvent::Abort, context());
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return;
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}
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else if (key == Key{Key::Modifiers::Control, 'r'})
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{
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m_insert_reg = true;
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}
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else if (key == Key::Up or
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key == Key{Key::Modifiers::Control, 'p'})
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{
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if (m_history_it != history.begin())
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{
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if (m_history_it == history.end())
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m_prefix = line;
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auto it = m_history_it;
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// search for the previous history entry matching typed prefix
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ByteCount prefix_length = m_prefix.length();
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do
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{
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--it;
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if (it->substr(0, prefix_length) == m_prefix)
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{
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m_history_it = it;
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m_line_editor.reset(*it);
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break;
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}
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} while (it != history.begin());
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}
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}
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else if (key == Key::Down or // next
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key == Key{Key::Modifiers::Control, 'n'})
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{
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if (m_history_it != history.end())
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{
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ByteCount prefix_length = m_prefix.length();
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// search for the next history entry matching typed prefix
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++m_history_it;
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while (m_history_it != history.end() and
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m_history_it->substr(0, prefix_length) != m_prefix)
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++m_history_it;
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if (m_history_it != history.end())
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m_line_editor.reset(*m_history_it);
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else
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m_line_editor.reset(m_prefix);
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}
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}
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else if (key == Key(Key::Modifiers::Control, 'i') or // tab completion
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key == Key::BackTab)
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{
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const bool reverse = (key == Key::BackTab);
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CandidateList& candidates = m_completions.candidates;
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// first try, we need to ask our completer for completions
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if (m_current_completion == -1)
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{
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m_completions = m_completer(context(), line,
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line.byte_count_to(m_line_editor.cursor_pos()));
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if (candidates.empty())
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return;
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context().ui().menu_hide();
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DisplayCoord menu_pos{ context().ui().dimensions().line, 0_char };
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context().ui().menu_show(candidates, menu_pos, MenuStyle::Prompt);
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bool use_common_prefix = context().options()["complete_prefix"].get<bool>();
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String prefix = use_common_prefix ? common_prefix(candidates) : String();
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if (m_completions.end - m_completions.start > prefix.length())
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prefix = line.substr(m_completions.start,
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m_completions.end - m_completions.start);
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auto it = find(candidates, prefix);
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if (it == candidates.end())
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{
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m_current_completion = use_common_prefix ? candidates.size() : 0;
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candidates.push_back(std::move(prefix));
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}
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else
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m_current_completion = use_common_prefix ? it - candidates.begin() : 0;
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}
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else if (not reverse and ++m_current_completion >= candidates.size())
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m_current_completion = 0;
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else if (reverse and --m_current_completion < 0)
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m_current_completion = candidates.size()-1;
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const String& completion = candidates[m_current_completion];
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context().ui().menu_select(m_current_completion);
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m_line_editor.insert_from(line.char_count_to(m_completions.start),
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completion);
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// when we have only one completion candidate, make next tab complete
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// from the new content.
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if (candidates.size() == 1)
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m_current_completion = -1;
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}
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else
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{
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context().ui().menu_hide();
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m_current_completion = -1;
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m_line_editor.handle_key(key);
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}
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context().ui().print_status(m_prompt + line,
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m_prompt.char_length() + m_line_editor.cursor_pos());
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m_callback(line, PromptEvent::Change, context());
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}
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private:
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PromptCallback m_callback;
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Completer m_completer;
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const String m_prompt;
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Completions m_completions;
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int m_current_completion = -1;
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String m_prefix;
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LineEditor m_line_editor;
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bool m_insert_reg = false;
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static std::unordered_map<String, std::vector<String>> ms_history;
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std::vector<String>::iterator m_history_it;
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};
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std::unordered_map<String, std::vector<String>> Prompt::ms_history;
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class NextKey : public InputMode
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{
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public:
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NextKey(InputHandler& input_handler, KeyCallback callback)
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: InputMode(input_handler), m_callback(callback) {}
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void on_key(const Key& key) override
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{
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reset_normal_mode();
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m_callback(key, context());
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}
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private:
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KeyCallback m_callback;
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};
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static std::pair<CandidateList, BufferIterator> complete_word(const BufferIterator& pos)
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{
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if (pos.is_begin() or not is_word(*utf8::previous(pos)))
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return { {}, pos };
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BufferIterator end = pos;
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BufferIterator begin = end-1;
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while (not begin.is_begin() and is_word(*begin))
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--begin;
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if (not is_word(*begin))
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++begin;
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const Buffer& buffer = pos.buffer();
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String ex = R"(\<\Q)" + buffer.string(begin, end) + R"(\E\w+\>)";
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Regex re(ex.begin(), ex.end());
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using RegexIt = boost::regex_iterator<BufferIterator>;
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CandidateList result;
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for (RegexIt it(buffer.begin(), buffer.end(), re), re_end; it != re_end; ++it)
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{
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auto& match = (*it)[0];
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if (match.first <= pos and pos < match.second)
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continue;
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String content = buffer.string(match.first, match.second);
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if (not contains(result, content))
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result.emplace_back(std::move(content));
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}
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std::sort(result.begin(), result.end());
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return { std::move(result), begin };
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}
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static std::pair<CandidateList, BufferIterator> complete_opt(const BufferIterator& pos, OptionManager& options)
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{
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using StringList = std::vector<String>;
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const StringList& opt = options["completions"].get<StringList>();
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if (opt.empty())
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return { {}, pos };
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auto& desc = opt[0];
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Regex re(R"((\d+):(\d+)@(\d+))");
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boost::match_results<String::iterator> match;
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if (boost::regex_match(desc.begin(), desc.end(), match, re))
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{
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LineCount line = str_to_int(String(match[1].first, match[1].second)) - 1;
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ByteCount column = str_to_int(String(match[2].first, match[2].second)) - 1;
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int timestamp = str_to_int(String(match[3].first, match[3].second));
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if (timestamp == pos.buffer().timestamp() and line == pos.line() and column == pos.column())
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return { { opt.begin() + 1, opt.end() }, pos };
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}
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return { {}, pos };
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}
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|
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class BufferCompleter : public OptionManagerWatcher
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{
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public:
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BufferCompleter(const Context& context)
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: m_context(context)
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{
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m_context.options().register_watcher(*this);
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}
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~BufferCompleter()
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{
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m_context.options().unregister_watcher(*this);
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}
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BufferCompleter(const BufferCompleter&) = delete;
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BufferCompleter operator=(const BufferCompleter&) = delete;
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void select(int offset)
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{
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if (not setup_ifn())
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return;
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|
|
|
m_context.buffer().erase(m_position, m_position + m_matching_completions[m_current_completion].length());
|
|
m_current_completion = (m_current_completion + offset) % (int)m_matching_completions.size();
|
|
if (m_current_completion < 0)
|
|
m_current_completion += m_matching_completions.size();
|
|
m_context.buffer().insert(m_position, m_matching_completions[m_current_completion]);
|
|
m_context.ui().menu_select(m_current_completion);
|
|
}
|
|
|
|
void update()
|
|
{
|
|
if (m_position.is_valid())
|
|
{
|
|
BufferIterator cursor = m_context.editor().main_selection().last();
|
|
ByteCount longest_completion = std::max_element(m_all_completions.begin(), m_all_completions.end(),
|
|
[](const String& lhs, const String& rhs)
|
|
{ return lhs.length() < rhs.length(); })->length();
|
|
if (cursor > m_position and ByteCount{(int)(cursor - m_position)} < longest_completion)
|
|
{
|
|
String prefix = m_context.buffer().string(m_position, cursor);
|
|
m_matching_completions.clear();
|
|
for (auto& candidate : m_all_completions)
|
|
{
|
|
if (candidate.substr(0, prefix.length()) == prefix)
|
|
m_matching_completions.push_back(candidate);
|
|
}
|
|
if (not m_matching_completions.empty())
|
|
{
|
|
m_context.ui().menu_hide();
|
|
m_current_completion = m_matching_completions.size();
|
|
DisplayCoord menu_pos = m_context.window().display_position(m_position);
|
|
m_context.ui().menu_show(m_matching_completions, menu_pos, MenuStyle::Inline);
|
|
m_context.ui().menu_select(m_current_completion);
|
|
m_matching_completions.push_back(prefix);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
reset();
|
|
select(0);
|
|
}
|
|
|
|
void reset()
|
|
{
|
|
m_position = BufferIterator();
|
|
m_context.ui().menu_hide();
|
|
}
|
|
private:
|
|
void on_option_changed(const Option& opt) override
|
|
{
|
|
if (opt.name() == "completions")
|
|
{
|
|
reset();
|
|
select(0);
|
|
}
|
|
}
|
|
|
|
bool setup_ifn()
|
|
{
|
|
if (not m_position.is_valid())
|
|
{
|
|
BufferIterator cursor = m_context.editor().main_selection().last();
|
|
auto completions = complete_opt(cursor, m_context.options());
|
|
if (completions.first.empty())
|
|
completions = complete_word(cursor);
|
|
m_all_completions = std::move(completions.first);
|
|
if (m_all_completions.empty())
|
|
return false;
|
|
|
|
assert(cursor >= completions.second);
|
|
m_position = completions.second;
|
|
|
|
m_matching_completions = m_all_completions;
|
|
DisplayCoord menu_pos = m_context.window().display_position(m_position);
|
|
m_context.ui().menu_show(m_matching_completions, menu_pos, MenuStyle::Inline);
|
|
m_matching_completions.push_back(m_context.buffer().string(m_position, cursor));
|
|
m_current_completion = m_matching_completions.size() - 1;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
const Context& m_context;
|
|
BufferIterator m_position;
|
|
CandidateList m_all_completions;
|
|
CandidateList m_matching_completions;
|
|
int m_current_completion = -1;
|
|
};
|
|
|
|
class Insert : public InputMode
|
|
{
|
|
public:
|
|
Insert(InputHandler& input_handler, InsertMode mode)
|
|
: InputMode(input_handler),
|
|
m_inserter(context().editor(), mode),
|
|
m_completer(context()),
|
|
m_idle_timer{Clock::now() + idle_timeout,
|
|
[this](Timer& timer) {
|
|
context().hooks().run_hook("InsertIdle", "", context());
|
|
m_completer.update();
|
|
}}
|
|
{
|
|
last_insert().first = mode;
|
|
last_insert().second.clear();
|
|
context().hooks().run_hook("InsertBegin", "", context());
|
|
}
|
|
|
|
void on_key(const Key& key) override
|
|
{
|
|
last_insert().second.push_back(key);
|
|
if (m_insert_reg)
|
|
{
|
|
if (key.modifiers == Key::Modifiers::None)
|
|
m_inserter.insert(RegisterManager::instance()[key.key].values(context()));
|
|
m_insert_reg = false;
|
|
return;
|
|
}
|
|
bool update_completions = true;
|
|
bool moved = false;
|
|
if (key == Key::Escape or key == Key{ Key::Modifiers::Control, 'c' })
|
|
{
|
|
context().hooks().run_hook("InsertEnd", "", context());
|
|
m_completer.reset();
|
|
reset_normal_mode();
|
|
}
|
|
else if (key == Key::Backspace)
|
|
m_inserter.erase();
|
|
else if (key == Key::Left)
|
|
{
|
|
m_inserter.move_cursors(-1_char);
|
|
moved = true;
|
|
}
|
|
else if (key == Key::Right)
|
|
{
|
|
m_inserter.move_cursors(1_char);
|
|
moved = true;
|
|
}
|
|
else if (key == Key::Up)
|
|
{
|
|
m_inserter.move_cursors(-1_line);
|
|
moved = true;
|
|
}
|
|
else if (key == Key::Down)
|
|
{
|
|
m_inserter.move_cursors(1_line);
|
|
moved = true;
|
|
}
|
|
else if (key.modifiers == Key::Modifiers::None)
|
|
{
|
|
m_inserter.insert(codepoint_to_str(key.key));
|
|
context().hooks().run_hook("InsertKey", key_to_str(key), context());
|
|
}
|
|
else if (key == Key{ Key::Modifiers::Control, 'r' })
|
|
m_insert_reg = true;
|
|
else if ( key == Key{ Key::Modifiers::Control, 'm' })
|
|
m_inserter.insert(String() + '\n');
|
|
else if ( key == Key{ Key::Modifiers::Control, 'i' })
|
|
m_inserter.insert(String() + '\t');
|
|
else if ( key == Key{ Key::Modifiers::Control, 'n' })
|
|
{
|
|
m_completer.select(1);
|
|
update_completions = false;
|
|
}
|
|
else if ( key == Key{ Key::Modifiers::Control, 'p' })
|
|
{
|
|
m_completer.select(-1);
|
|
update_completions = false;
|
|
}
|
|
|
|
if (update_completions)
|
|
m_idle_timer.set_next_date(Clock::now() + idle_timeout);
|
|
if (moved)
|
|
context().hooks().run_hook("InsertMove", key_to_str(key), context());
|
|
}
|
|
private:
|
|
bool m_insert_reg = false;
|
|
IncrementalInserter m_inserter;
|
|
BufferCompleter m_completer;
|
|
Timer m_idle_timer;
|
|
};
|
|
|
|
}
|
|
|
|
void InputMode::reset_normal_mode()
|
|
{
|
|
m_input_handler.m_mode_trash.emplace_back(std::move(m_input_handler.m_mode));
|
|
m_input_handler.m_mode.reset(new InputModes::Normal(m_input_handler));
|
|
}
|
|
|
|
|
|
InputHandler::InputHandler(UserInterface& ui)
|
|
: m_context(*this, ui), m_mode(new InputModes::Normal(*this))
|
|
{
|
|
}
|
|
|
|
InputHandler::~InputHandler()
|
|
{
|
|
}
|
|
|
|
void InputHandler::insert(InsertMode mode)
|
|
{
|
|
m_mode_trash.emplace_back(std::move(m_mode));
|
|
m_mode.reset(new InputModes::Insert(*this, mode));
|
|
}
|
|
|
|
void InputHandler::repeat_last_insert()
|
|
{
|
|
if (m_last_insert.second.empty())
|
|
return;
|
|
|
|
std::vector<Key> keys;
|
|
swap(keys, m_last_insert.second);
|
|
// context.last_insert will be refilled by the new Insert
|
|
// this is very inefficient.
|
|
m_mode_trash.emplace_back(std::move(m_mode));
|
|
m_mode.reset(new InputModes::Insert(*this, m_last_insert.first));
|
|
for (auto& key : keys)
|
|
m_mode->on_key(key);
|
|
assert(dynamic_cast<InputModes::Normal*>(m_mode.get()) != nullptr);
|
|
}
|
|
|
|
void InputHandler::prompt(const String& prompt, Completer completer,
|
|
PromptCallback callback)
|
|
{
|
|
m_mode_trash.emplace_back(std::move(m_mode));
|
|
m_mode.reset(new InputModes::Prompt(*this, prompt, completer, callback));
|
|
}
|
|
|
|
void InputHandler::menu(const memoryview<String>& choices,
|
|
MenuCallback callback)
|
|
{
|
|
m_mode_trash.emplace_back(std::move(m_mode));
|
|
m_mode.reset(new InputModes::Menu(*this, choices, callback));
|
|
}
|
|
|
|
void InputHandler::on_next_key(KeyCallback callback)
|
|
{
|
|
m_mode_trash.emplace_back(std::move(m_mode));
|
|
m_mode.reset(new InputModes::NextKey(*this, callback));
|
|
}
|
|
|
|
bool is_valid(const Key& key)
|
|
{
|
|
return key != Key::Invalid and key.key <= 0x10FFFF;
|
|
}
|
|
|
|
void InputHandler::handle_available_inputs()
|
|
{
|
|
m_mode_trash.clear();
|
|
while (m_context.ui().is_key_available())
|
|
{
|
|
Key key = m_context.ui().get_key();
|
|
if (is_valid(key))
|
|
{
|
|
const bool was_recording = is_recording();
|
|
|
|
m_mode->on_key(key);
|
|
|
|
// do not record the key that made us enter or leave recording mode.
|
|
if (was_recording and is_recording())
|
|
m_recorded_keys += key_to_str(key);
|
|
}
|
|
m_mode_trash.clear();
|
|
}
|
|
}
|
|
|
|
void InputHandler::start_recording(char reg)
|
|
{
|
|
assert(m_recording_reg == 0);
|
|
m_recorded_keys = "";
|
|
m_recording_reg = reg;
|
|
}
|
|
|
|
bool InputHandler::is_recording() const
|
|
{
|
|
return m_recording_reg != 0;
|
|
}
|
|
|
|
void InputHandler::stop_recording()
|
|
{
|
|
assert(m_recording_reg != 0);
|
|
RegisterManager::instance()[m_recording_reg] = memoryview<String>(m_recorded_keys);
|
|
m_recording_reg = 0;
|
|
}
|
|
|
|
}
|