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input_handler.cc
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input_handler.cc
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#include "input_handler.hh"
#include "buffer.hh"
#include "debug.hh"
#include "command_manager.hh"
#include "client.hh"
#include "event_manager.hh"
#include "face_registry.hh"
#include "insert_completer.hh"
#include "normal.hh"
#include "option_types.hh"
#include "regex.hh"
#include "register_manager.hh"
#include "user_interface.hh"
#include "window.hh"
#include "word_db.hh"
#include <concepts>
#include <utility>
#include <limits>
namespace Kakoune
{
class InputMode : public RefCountable
{
public:
InputMode(InputHandler& input_handler) : m_input_handler(input_handler) {}
~InputMode() override = default;
InputMode(const InputMode&) = delete;
InputMode& operator=(const InputMode&) = delete;
void handle_key(Key key, bool synthesized) { RefPtr<InputMode> keep_alive{this}; on_key(key, synthesized); }
virtual void paste(StringView content);
virtual void on_enabled(bool from_pop) {}
virtual void on_disabled(bool from_push) {}
virtual void refresh_ifn() {}
bool enabled() const { return &m_input_handler.current_mode() == this; }
Context& context() const { return m_input_handler.context(); }
virtual ModeInfo mode_info() const = 0;
virtual KeymapMode keymap_mode() const = 0;
virtual StringView name() const = 0;
virtual std::pair<CursorMode, DisplayCoord> get_cursor_info() const
{
const auto cursor = context().selections().main().cursor();
auto coord = context().window().display_coord(cursor).value_or(DisplayCoord{});
return {CursorMode::Buffer, coord};
}
using Insertion = InputHandler::Insertion;
protected:
virtual void on_key(Key key, bool synthesized) = 0;
void push_mode(InputMode* new_mode) { m_input_handler.push_mode(new_mode); }
void pop_mode() { m_input_handler.pop_mode(this); }
void record_key(Key key) { m_input_handler.record_key(key); }
void drop_last_recorded_key() { m_input_handler.drop_last_recorded_key(); }
private:
InputHandler& m_input_handler;
};
void InputMode::paste(StringView content)
{
try
{
Buffer& buffer = context().buffer();
const bool linewise = not content.empty() and content.back() == '\n';
ScopedEdition edition{context()};
ScopedSelectionEdition selection_edition{context()};
context().selections().for_each([&buffer, content=std::move(content), linewise]
(size_t index, Selection& sel) {
auto& min = sel.min();
auto& max = sel.max();
BufferRange range =
buffer.insert(paste_pos(buffer, min, max, PasteMode::Insert, linewise), content);
min = range.begin;
max = range.end > range.begin ? buffer.char_prev(range.end) : range.begin;
}, false);
}
catch (Kakoune::runtime_error& error)
{
write_to_debug_buffer(format("Error: {}", error.what()));
context().print_status({error.what().str(), context().faces()["Error"] });
context().hooks().run_hook(Hook::RuntimeError, error.what(), context());
}
}
namespace InputModes
{
std::chrono::milliseconds get_idle_timeout(const Context& context)
{
return std::chrono::milliseconds{context.options()["idle_timeout"].get<int>()};
}
std::chrono::milliseconds get_fs_check_timeout(const Context& context)
{
return std::chrono::milliseconds{context.options()["fs_check_timeout"].get<int>()};
}
struct MouseHandler
{
bool handle_key(Key key, Context& context)
{
if (not context.has_window())
return false;
Buffer& buffer = context.buffer();
// bits above these potentially store additional information
constexpr auto mask = (Key::Modifiers) 0x7FF;
constexpr auto modifiers = Key::Modifiers::Control | Key::Modifiers::Alt | Key::Modifiers::Shift | Key::Modifiers::MouseButtonMask | ~mask;
switch ((key.modifiers & ~modifiers).value)
{
case Key::Modifiers::MousePress:
switch (key.mouse_button())
{
case Key::MouseButton::Right: {
m_dragging.reset();
auto cursor = context.window().buffer_coord(key.coord());
if (not cursor)
{
context.ensure_cursor_visible = false;
return true;
}
ScopedSelectionEdition selection_edition{context};
auto& selections = context.selections();
if (key.modifiers & Key::Modifiers::Control)
selections = {{selections.begin()->anchor(), *cursor}};
else
selections.main() = {selections.main().anchor(), *cursor};
selections.sort_and_merge_overlapping();
return true;
}
case Key::MouseButton::Left: {
m_dragging.reset(new ScopedSelectionEdition{context});
auto anchor = context.window().buffer_coord(key.coord());
if (not anchor)
{
context.ensure_cursor_visible = false;
return true;
}
m_anchor = *anchor;
if (not (key.modifiers & Key::Modifiers::Control))
context.selections_write_only() = { buffer, m_anchor};
else
{
auto& selections = context.selections();
size_t main = selections.size();
selections.push_back({m_anchor});
selections.set_main_index(main);
selections.sort_and_merge_overlapping();
}
return true;
}
default: return true;
}
case Key::Modifiers::MouseRelease: {
auto cursor = context.window().buffer_coord(key.coord());
if (not m_dragging or not cursor)
{
context.ensure_cursor_visible = false;
return true;
}
auto& selections = context.selections();
selections.main() = {buffer.clamp(m_anchor), *cursor};
selections.sort_and_merge_overlapping();
m_dragging.reset();
return true;
}
case Key::Modifiers::MousePos: {
auto cursor = context.window().buffer_coord(key.coord());
if (not m_dragging or not cursor)
{
context.ensure_cursor_visible = false;
return true;
}
auto& selections = context.selections();
selections.main() = {buffer.clamp(m_anchor), *cursor};
selections.sort_and_merge_overlapping();
return true;
}
case Key::Modifiers::Scroll:
scroll_window(context, key.scroll_amount(), m_dragging ? OnHiddenCursor::MoveCursor : OnHiddenCursor::PreserveSelections);
return true;
default: return false;
}
}
private:
std::unique_ptr<ScopedSelectionEdition> m_dragging;
BufferCoord m_anchor;
};
constexpr StringView register_doc =
"Special registers:\n"
"[0-9]: selections capture group\n"
"%: buffer name\n"
".: selection contents\n"
"#: selection index\n"
"_: null register\n"
"\": default yank/paste register\n"
"@: default macro register\n"
"/: default search register\n"
"^: default mark register\n"
"|: default shell command register\n"
":: last entered command\n";
class Normal : public InputMode
{
public:
Normal(InputHandler& input_handler, bool single_command = false)
: InputMode(input_handler),
m_idle_timer{TimePoint::max(),
context().flags() & Context::Flags::Draft ?
Timer::Callback{} : [this](Timer&) {
RefPtr<InputMode> keep_alive{this}; // hook could trigger pop_mode()
if (context().has_client())
context().client().clear_pending();
context().hooks().run_hook(Hook::NormalIdle, "", context());
}},
m_fs_check_timer{TimePoint::max(),
context().flags() & Context::Flags::Draft ?
Timer::Callback{} : Timer::Callback{[this](Timer& timer) {
if (context().has_client())
context().client().check_if_buffer_needs_reloading();
timer.set_next_date(Clock::now() + get_fs_check_timeout(context()));
}}},
m_state(single_command ? State::SingleCommand : State::Normal)
{}
void on_enabled(bool from_pop) override
{
if (m_state == State::PopOnEnabled)
return pop_mode();
if (not (context().flags() & Context::Flags::Draft))
{
if (context().has_client())
context().client().check_if_buffer_needs_reloading();
m_fs_check_timer.set_next_date(Clock::now() + get_fs_check_timeout(context()));
m_idle_timer.set_next_date(Clock::now() + get_idle_timeout(context()));
}
if (m_hooks_disabled and not m_in_on_key)
{
context().hooks_disabled().unset();
m_hooks_disabled = false;
}
}
void on_disabled(bool from_push) override
{
m_idle_timer.disable();
m_fs_check_timer.disable();
if (not from_push and m_hooks_disabled)
{
context().hooks_disabled().unset();
m_hooks_disabled = false;
}
}
void on_key(Key key, bool) override
{
bool should_clear = false;
kak_assert(m_state != State::PopOnEnabled);
ScopedSetBool set_in_on_key{m_in_on_key};
bool do_restore_hooks = false;
auto restore_hooks = on_scope_end([&, this]{
if (m_hooks_disabled and enabled() and do_restore_hooks)
{
context().hooks_disabled().unset();
m_hooks_disabled = false;
}
});
const bool transient = context().flags() & Context::Flags::Draft;
if (m_mouse_handler.handle_key(key, context()))
{
should_clear = true;
if (not transient)
m_idle_timer.set_next_date(Clock::now() + get_idle_timeout(context()));
}
else if (auto cp = key.codepoint(); cp and isdigit(*cp))
{
long long new_val = (long long)m_params.count * 10 + *cp - '0';
if (new_val > std::numeric_limits<int>::max())
context().print_status({ "parameter overflowed", context().faces()["Error"] });
else
m_params.count = new_val;
}
else if (key == Key::Backspace)
m_params.count /= 10;
else if (key == '\\')
{
if (not m_hooks_disabled)
{
m_hooks_disabled = true;
context().hooks_disabled().set();
}
}
else if (key == '"')
{
on_next_key_with_autoinfo(context(), "register", KeymapMode::None,
[this](Key key, Context& context) {
auto cp = key.codepoint();
if (not cp or key == Key::Escape)
return;
if (*cp <= 127)
m_params.reg = *cp;
else
context.print_status(
{ format("invalid register '{}'", *cp),
context.faces()["Error"] });
}, "enter target register", register_doc.str());
}
else
{
auto pop_if_single_command = on_scope_end([this] {
if (m_state == State::SingleCommand and enabled())
pop_mode();
else if (m_state == State::SingleCommand)
m_state = State::PopOnEnabled;
});
should_clear = true;
// Hack to parse keys sent by terminals using the 8th bit to mark the
// meta key. In normal mode, give priority to a potential alt-key than
// the accentuated character.
if (key.key >= 127 and key.key < 256)
{
key.modifiers |= Key::Modifiers::Alt;
key.key &= 0x7f;
}
do_restore_hooks = true;
if (auto command = get_normal_command(key))
{
auto autoinfo = context().options()["autoinfo"].get<AutoInfo>();
if (autoinfo & AutoInfo::Normal and context().has_client())
context().client().info_show(to_string(key), command->docstring.str(),
{}, InfoStyle::Prompt);
// reset m_params now to be reentrant
NormalParams params = m_params;
m_params = { 0, 0 };
command->func(context(), params);
}
else
m_params = { 0, 0 };
}
context().hooks().run_hook(Hook::NormalKey, to_string(key), context());
if (enabled() and not transient) // The hook might have changed mode
{
if (should_clear and context().has_client())
context().client().schedule_clear();
m_idle_timer.set_next_date(Clock::now() + get_idle_timeout(context()));
}
}
ModeInfo mode_info() const override
{
AtomList atoms;
auto num_sel = context().selections().size();
auto main_index = context().selections().main_index();
if (num_sel == 1)
atoms.emplace_back(format("{} sel", num_sel), context().faces()["StatusLineInfo"]);
else
atoms.emplace_back(format("{} sels ({})", num_sel, main_index + 1), context().faces()["StatusLineInfo"]);
if (m_params.count != 0)
{
atoms.emplace_back(" param=", context().faces()["StatusLineInfo"]);
atoms.emplace_back(to_string(m_params.count), context().faces()["StatusLineValue"]);
}
if (m_params.reg)
{
atoms.emplace_back(" reg=", context().faces()["StatusLineInfo"]);
atoms.emplace_back(StringView(m_params.reg).str(), context().faces()["StatusLineValue"]);
}
return {atoms, m_params};
}
void paste(StringView content) override
{
InputMode::paste(content);
if (not (context().flags() & Context::Flags::Draft))
{
if (context().has_client())
context().client().schedule_clear();
m_idle_timer.set_next_date(Clock::now() + get_idle_timeout(context()));
}
}
KeymapMode keymap_mode() const override { return KeymapMode::Normal; }
StringView name() const override { return "normal"; }
private:
friend struct InputHandler::ScopedForceNormal;
NormalParams m_params = { 0, 0 };
bool m_hooks_disabled = false;
NestedBool m_in_on_key;
Timer m_idle_timer;
Timer m_fs_check_timer;
MouseHandler m_mouse_handler;
enum class State { Normal, SingleCommand, PopOnEnabled };
State m_state;
};
template<WordType word_type>
void to_next_word_begin(CharCount& pos, StringView line)
{
const CharCount len = line.char_length();
if (pos == len)
return;
if (word_type == Word and is_punctuation(line[pos]))
{
while (pos != len and is_punctuation(line[pos]))
++pos;
}
else if (is_word<word_type>(line[pos]))
{
while (pos != len and is_word<word_type>(line[pos]))
++pos;
}
while (pos != len and is_horizontal_blank(line[pos]))
++pos;
}
template<WordType word_type>
void to_next_word_end(CharCount& pos, StringView line)
{
const CharCount len = line.char_length();
if (pos + 1 >= len)
return;
++pos;
while (pos != len and is_horizontal_blank(line[pos]))
++pos;
if (word_type == Word and is_punctuation(line[pos]))
{
while (pos != len and is_punctuation(line[pos]))
++pos;
}
else if (is_word<word_type>(line[pos]))
{
while (pos != len and is_word<word_type>(line[pos]))
++pos;
}
--pos;
}
template<WordType word_type>
void to_prev_word_begin(CharCount& pos, StringView line)
{
if (pos == 0_char)
return;
--pos;
while (pos != 0_char and is_horizontal_blank(line[pos]))
--pos;
if (word_type == Word and is_punctuation(line[pos]))
{
while (pos != 0_char and is_punctuation(line[pos]))
--pos;
if (!is_punctuation(line[pos]))
++pos;
}
else if (is_word<word_type>(line[pos]))
{
while (pos != 0_char and is_word<word_type>(line[pos]))
--pos;
if (!is_word<word_type>(line[pos]))
++pos;
}
}
class LineEditor
{
public:
LineEditor(const FaceRegistry& faces) : m_faces{faces} {}
void handle_key(Key key)
{
auto erase_move = [this](auto&& move_func) {
auto old_pos = m_cursor_pos;
move_func(m_cursor_pos, m_line);
if (m_cursor_pos > old_pos)
std::swap(m_cursor_pos, old_pos);
m_clipboard = m_line.substr(m_cursor_pos, old_pos - m_cursor_pos).str();
m_line = m_line.substr(0, m_cursor_pos) + m_line.substr(old_pos);
};
if (key == Key::Left or key == ctrl('b'))
{
if (m_cursor_pos > 0)
--m_cursor_pos;
}
else if (key == Key::Right or key == ctrl('f'))
{
if (m_cursor_pos < m_line.char_length())
++m_cursor_pos;
}
else if (key == Key::Home or key == ctrl('a'))
m_cursor_pos = 0;
else if (key == Key::End or key == ctrl('e'))
m_cursor_pos = m_line.char_length();
else if (key == Key::Backspace or key == shift(Key::Backspace) or key == ctrl('h'))
{
if (m_cursor_pos != 0)
{
m_line = m_line.substr(0_char, m_cursor_pos - 1)
+ m_line.substr(m_cursor_pos);
--m_cursor_pos;
}
}
else if (key == Key::Delete or key == ctrl('d'))
{
if (m_cursor_pos != m_line.char_length())
m_line = m_line.substr(0, m_cursor_pos)
+ m_line.substr(m_cursor_pos+1);
}
else if (key == alt('f'))
to_next_word_begin<Word>(m_cursor_pos, m_line);
else if (key == alt('F'))
to_next_word_begin<WORD>(m_cursor_pos, m_line);
else if (key == alt('b'))
to_prev_word_begin<Word>(m_cursor_pos, m_line);
else if (key == alt('B'))
to_prev_word_begin<WORD>(m_cursor_pos, m_line);
else if (key == alt('e'))
to_next_word_end<Word>(m_cursor_pos, m_line);
else if (key == alt('E'))
to_next_word_end<WORD>(m_cursor_pos, m_line);
else if (key == ctrl('k'))
{
m_clipboard = m_line.substr(m_cursor_pos).str();
m_line = m_line.substr(0, m_cursor_pos).str();
}
else if (key == ctrl('u'))
{
m_clipboard = m_line.substr(0, m_cursor_pos).str();
m_line = m_line.substr(m_cursor_pos).str();
m_cursor_pos = 0;
}
else if (key == ctrl('w') or key == alt(Key::Backspace))
erase_move(&to_prev_word_begin<Word>);
else if (key == ctrl('W'))
erase_move(&to_prev_word_begin<WORD>);
else if (key == alt('d'))
erase_move(&to_next_word_begin<Word>);
else if (key == alt('D'))
erase_move(&to_next_word_begin<WORD>);
else if (key == ctrl('y'))
{
m_line = m_line.substr(0, m_cursor_pos) + m_clipboard + m_line.substr(m_cursor_pos);
m_cursor_pos += m_clipboard.char_length();
}
else if (auto cp = key.codepoint())
insert(*cp);
}
void insert(Codepoint cp)
{
m_line = m_line.substr(0, m_cursor_pos) + String{cp}
+ m_line.substr(m_cursor_pos);
++m_cursor_pos;
}
void insert(StringView str)
{
insert_from(m_cursor_pos, str);
}
void insert_from(CharCount start, StringView str)
{
kak_assert(start <= m_cursor_pos);
m_line = m_line.substr(0, start) + str
+ m_line.substr(m_cursor_pos);
m_cursor_pos = start + str.char_length();
}
void reset(String line, StringView empty_text)
{
m_line = std::move(line);
m_empty_text = empty_text;
m_cursor_pos = m_line.char_length();
m_display_pos = 0;
}
const String& line() const { return m_line; }
CharCount cursor_pos() const { return m_cursor_pos; }
ColumnCount cursor_display_column() const
{
return m_line.substr(m_display_pos, m_cursor_pos).column_length();
}
DisplayLine build_display_line(ColumnCount in_width)
{
CharCount width = (int)in_width; // Todo: proper handling of char/column
kak_assert(m_cursor_pos <= m_line.char_length());
if (m_cursor_pos < m_display_pos)
m_display_pos = m_cursor_pos;
if (m_cursor_pos >= m_display_pos + width)
m_display_pos = m_cursor_pos + 1 - width;
const bool empty = m_line.empty();
StringView str = empty ? m_empty_text : m_line;
const Face line_face = m_faces[empty ? "StatusLineInfo" : "StatusLine"];
const Face cursor_face = m_faces["StatusCursor"];
if (m_cursor_pos == str.char_length())
return DisplayLine{{ { str.substr(m_display_pos, width-1).str(), line_face },
{ " "_str, cursor_face} } };
else
return DisplayLine({ { str.substr(m_display_pos, m_cursor_pos - m_display_pos).str(), line_face },
{ str.substr(m_cursor_pos,1).str(), cursor_face },
{ str.substr(m_cursor_pos+1, width - m_cursor_pos + m_display_pos - 1).str(), line_face } });
}
private:
CharCount m_cursor_pos = 0;
CharCount m_display_pos = 0;
String m_line;
StringView m_empty_text = {};
String m_clipboard;
const FaceRegistry& m_faces;
};
static Optional<Codepoint> get_raw_codepoint(Key key)
{
if (auto cp = key.codepoint())
return cp;
else if (key.modifiers == Key::Modifiers::Control and
((key.key >= '@' and key.key <= '_') or
(key.key >= 'a' and key.key <= 'z')))
return {(Codepoint)(to_upper((char)key.key) - '@')};
return {};
}
class Prompt : public InputMode
{
public:
Prompt(InputHandler& input_handler, StringView prompt,
String initstr, String emptystr, Face face, PromptFlags flags,
char history_register, PromptCompleter completer, PromptCallback callback)
: InputMode(input_handler), m_callback(std::move(callback)), m_completer(std::move(completer)),
m_prompt(prompt.str()), m_prompt_face(face),
m_empty_text{std::move(emptystr)},
// This prompt may outlive local scopes so ignore local faces.
m_line_editor{context().faces(false)}, m_flags(flags),
m_was_interactive{not context().noninteractive()},
m_history{RegisterManager::instance()[history_register]},
m_current_history{-1},
m_auto_complete{context().options()["autocomplete"].get<AutoComplete>() & AutoComplete::Prompt},
m_idle_timer{TimePoint::max(), context().flags() & Context::Flags::Draft ?
Timer::Callback{} : [this](Timer&) {
RefPtr<InputMode> keep_alive{this}; // hook or m_callback could trigger pop_mode()
if (m_auto_complete and m_refresh_completion_pending)
refresh_completions(CompletionFlags::Fast);
if (m_line_changed)
{
m_callback(m_line_editor.line(), PromptEvent::Change, context());
m_line_changed = false;
}
context().hooks().run_hook(Hook::PromptIdle, "", context());
}}
{
m_line_editor.reset(std::move(initstr), m_empty_text);
}
void on_key(Key key, bool synthesized) override
{
const String& line = m_line_editor.line();
if (not synthesized)
m_was_interactive = true;
auto can_auto_insert_completion = [&] {
const bool has_completions = not m_completions.candidates.empty();
const bool completion_selected = m_current_completion != -1;
const bool text_entered = m_completions.start != line.byte_count_to(m_line_editor.cursor_pos());
const bool at_end = line.byte_count_to(m_line_editor.cursor_pos()) == line.length();
return (m_completions.flags & Completions::Flags::Menu) and
has_completions and
not completion_selected and at_end and
(not (m_completions.flags & Completions::Flags::NoEmpty) or text_entered);
};
if (key == Key::Return)
{
if (can_auto_insert_completion())
{
const String& completion = m_completions.candidates.front();
m_line_editor.insert_from(line.char_count_to(m_completions.start),
completion);
}
history_push(line);
context().print_status(DisplayLine{});
if (context().has_client())
context().client().menu_hide();
// Maintain hooks disabled in callback if they were before pop_mode
ScopedSetBool disable_hooks(context().hooks_disabled(),
context().hooks_disabled());
pop_mode();
// call callback after pop_mode so that callback
// may change the mode
m_callback(line, PromptEvent::Validate, context());
return;
}
else if (key == Key::Escape or key == ctrl('c') or
((key == Key::Backspace or key == shift(Key::Backspace) or key == ctrl('h')) and line.empty()))
{
history_push(line);
context().print_status(DisplayLine{});
if (context().has_client())
context().client().menu_hide();
// Maintain hooks disabled in callback if they were before pop_mode
ScopedSetBool disable_hooks(context().hooks_disabled(),
context().hooks_disabled());
pop_mode();
m_callback(line, PromptEvent::Abort, context());
return;
}
else if (key == ctrl('r'))
{
on_next_key_with_autoinfo(context(), "register", KeymapMode::None,
[this](Key key, Context&) {
const bool joined = (bool)(key.modifiers & Key::Modifiers::Alt);
key.modifiers &= ~Key::Modifiers::Alt;
auto cp = key.codepoint();
if (not cp or key == Key::Escape)
return;
m_line_editor.insert(
joined ? join(RegisterManager::instance()[*cp].get(context()), ' ', false)
: context().main_sel_register_value(String{*cp}));
display();
m_line_changed = true;
m_refresh_completion_pending = true;
}, "enter register name", register_doc.str());
display();
return;
}
else if (key == ctrl('v'))
{
on_next_key_with_autoinfo(context(), "raw-key", KeymapMode::None,
[this](Key key, Context&) {
if (auto cp = get_raw_codepoint(key))
{
m_line_editor.insert(*cp);
display();
m_line_changed = true;
m_refresh_completion_pending = true;
}
}, "raw insert", "enter key to insert");
display();
return;
}
else if (key == Key::Up or key == ctrl('p'))
{
auto history = m_history.get(context());
m_current_history = std::min(static_cast<int>(history.size()) - 1, m_current_history);
if (m_current_history == -1)
m_prefix = line;
auto next = find_if(history.subrange(m_current_history + 1), [this](StringView s) { return prefix_match(s, m_prefix); });
if (next != history.end())
{
m_current_history = next - history.begin();
m_line_editor.reset(*next, m_empty_text);
}
clear_completions();
m_refresh_completion_pending = true;
}
else if (key == Key::Down or key == ctrl('n')) // next
{
auto history = m_history.get(context());
m_current_history = std::min(static_cast<int>(history.size()) - 1, m_current_history);
if (m_current_history >= 0)
{
auto next = find_if(history.subrange(0, m_current_history) | reverse(), [this](StringView s) { return prefix_match(s, m_prefix); });
m_current_history = history.rend() - next - 1;
m_line_editor.reset(next != history.rend() ? *next : m_prefix, m_empty_text);
clear_completions();
m_refresh_completion_pending = true;
}
}
else if (key == Key::Tab or key == shift(Key::Tab) or key.modifiers == Key::Modifiers::MenuSelect) // completion
{
CandidateList& candidates = m_completions.candidates;
if (m_auto_complete and m_refresh_completion_pending)
refresh_completions(CompletionFlags::Fast);
if (candidates.empty()) // manual completion, we need to ask our completer for completions
{
refresh_completions(CompletionFlags::None);
if ((not m_prefix_in_completions and candidates.size() > 1) or
candidates.size() > 2)
return;
}
if (candidates.empty())
return;
const bool reverse = (key == shift(Key::Tab));
if (key.modifiers == Key::Modifiers::MenuSelect)
m_current_completion = clamp<int>(key.key, 0, candidates.size() - 1);
else if (not reverse and ++m_current_completion >= candidates.size())
m_current_completion = 0;
else if (reverse and --m_current_completion < 0)
m_current_completion = candidates.size()-1;
const String& completion = candidates[m_current_completion];
if (context().has_client())
context().client().menu_select(m_current_completion);
m_line_editor.insert_from(line.char_count_to(m_completions.start),
completion);
// when we have only one completion candidate, make next tab complete
// from the new content.
if (candidates.size() == 1 or
(m_prefix_in_completions and candidates.size() == 2))
{
m_current_completion = -1;
candidates.clear();
m_refresh_completion_pending = true;
}
}
else if (key == ctrl('x'))
{
on_next_key_with_autoinfo(context(), "explicit-completion", KeymapMode::None,
[this](Key key, Context&) {
m_explicit_completer = ArgCompleter{};
if (key.key == 'f')
use_explicit_completer([](const Context& context, StringView token) {
return complete_filename(token, context.options()["ignored_files"].get<Regex>(),
token.length(), FilenameFlags::Expand);
});
else if (key.key == 'w')
use_explicit_completer([](const Context& context, StringView token) {
CandidateList candidates;
for_n_best(get_word_db(context.buffer()).find_matching(token),
100, [](auto& lhs, auto& rhs){ return rhs < lhs; },
[&](RankedMatch& m) {
candidates.push_back(m.candidate().str());
return true;
});
return candidates;
});
if (m_explicit_completer)
refresh_completions(CompletionFlags::None);
}, "enter completion type",
"f: filename\n"
"w: buffer word\n");
}
else if (key == ctrl('o'))
{
m_explicit_completer = ArgCompleter{};
m_auto_complete = not m_auto_complete;
if (m_auto_complete)
refresh_completions(CompletionFlags::Fast);
else if (context().has_client())
{
clear_completions();
context().client().menu_hide();
}
}
else if (key == alt('!'))
{
try
{
m_line_editor.reset(expand(line, context()), m_empty_text);
}
catch (std::runtime_error& error)
{
context().print_status({error.what(), context().faces()["Error"]});
return;
}
}
else if (key == alt(';'))
{
push_mode(new Normal(context().input_handler(), true));
return;
}
else
{
if ((key == Key::Space or key == shift(Key::Space)) and
not (m_completions.flags & Completions::Flags::Quoted) and // if token is quoted, this space does not end it
can_auto_insert_completion())
m_line_editor.insert_from(line.char_count_to(m_completions.start),
m_completions.candidates.front());
m_line_editor.handle_key(key);
clear_completions();
m_refresh_completion_pending = true;
}
display();
m_line_changed = true;
if (enabled() and not (context().flags() & Context::Flags::Draft)) // The callback might have disabled us
m_idle_timer.set_next_date(Clock::now() + get_idle_timeout(context()));
}
void refresh_ifn() override
{
bool explicit_completion_selected = m_current_completion != -1 and
(not m_prefix_in_completions or m_current_completion != m_completions.candidates.size() - 1);
if (not enabled() or (context().flags() & Context::Flags::Draft) or explicit_completion_selected)
return;
if (auto next_date = Clock::now() + get_idle_timeout(context());
next_date < m_idle_timer.next_date())
m_idle_timer.set_next_date(next_date);
m_refresh_completion_pending = true;
}
void paste(StringView content) override
{
m_line_editor.insert(content);
clear_completions();
m_refresh_completion_pending = true;
display();
m_line_changed = true;
if (not (context().flags() & Context::Flags::Draft))
m_idle_timer.set_next_date(Clock::now() + get_idle_timeout(context()));
}
void set_prompt_face(Face face)
{
if (face != m_prompt_face)
{
m_prompt_face = face;
display();
}
}
ModeInfo mode_info() const override
{
return {{ "prompt", context().faces()["StatusLineMode"] }, {}};
}
KeymapMode keymap_mode() const override { return KeymapMode::Prompt; }
StringView name() const override { return "prompt"; }
std::pair<CursorMode, DisplayCoord> get_cursor_info() const override
{
DisplayCoord coord{0_line, m_prompt.column_length() + m_line_editor.cursor_display_column()};
return { CursorMode::Prompt, coord };
}
private:
template<typename Completer>
void use_explicit_completer(Completer&& completer)
{
m_explicit_completer = [completer](const Context& context, CompletionFlags flags, StringView content, ByteCount cursor_pos) {
Optional<Token> last_token;