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kakoune/src/client.cc

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#include "client.hh"
#include "context.hh"
#include "register_manager.hh"
#include <unordered_map>
namespace Kakoune
{
extern std::unordered_map<Key, std::function<void (Context& context)>> keymap;
class Client::NormalMode : public Client::Mode
{
public:
NormalMode(Client& client)
: Client::Mode(client)
{
}
void on_key(const Key& key, Context& context) override
{
if (key.modifiers == Key::Modifiers::None and isdigit(key.key))
m_count = m_count * 10 + key.key - '0';
else
{
auto it = keymap.find(key);
if (it != keymap.end())
{
context.numeric_param(m_count);
// it's important to do that before calling the command,
// as we may die during the command execution.
m_count = 0;
it->second(context);
}
else
m_count = 0;
}
}
private:
int m_count = 0;
};
class Client::MenuMode : public Client::Mode
{
public:
MenuMode(Client& client, const memoryview<String>& choices, MenuCallback callback)
: Client::Mode(client),
m_callback(callback), m_choice_count(choices.size()), m_selected(0)
{
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client.menu_show(choices);
}
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~MenuMode()
{
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m_client.menu_hide();
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}
void on_key(const Key& key, Context& context) override
{
if (key == Key::Down or
key == Key(Key::Modifiers::Control, 'n') or
key == Key(Key::Modifiers::None, 'j'))
{
if (++m_selected >= m_choice_count)
m_selected = 0;
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m_client.menu_select(m_selected);
}
if (key == Key::Up or
key == Key(Key::Modifiers::Control, 'p') or
key == Key(Key::Modifiers::None, 'k'))
{
if (--m_selected < 0)
m_selected = m_choice_count-1;
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m_client.menu_select(m_selected);
}
if (key == Key(Key::Modifiers::Control, 'm'))
{
// save callback as reset_normal_mode will delete this
MenuCallback callback = std::move(m_callback);
int selected = m_selected;
m_client.reset_normal_mode();
callback(selected, context);
}
if (key == Key::Escape)
{
m_client.reset_normal_mode();
}
if (key.modifiers == Key::Modifiers::None and
key.key >= '0' and key.key <= '9')
{
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m_client.menu_hide();
// save callback as reset_normal_mode will delete this
MenuCallback callback = std::move(m_callback);
m_client.reset_normal_mode();
callback(key.key - '0' - 1, context);
}
}
private:
MenuCallback m_callback;
int m_selected;
int m_choice_count;
};
class Client::PromptMode : public Client::Mode
{
public:
PromptMode(Client& client, const String& prompt,
Completer completer, PromptCallback callback)
: Client::Mode(client), m_prompt(prompt),
m_completer(completer), m_callback(callback)
{
m_history_it = ms_history[m_prompt].end();
m_client.print_status(m_prompt, m_prompt.length());
}
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~PromptMode()
{
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m_client.menu_hide();
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}
void on_key(const Key& key, Context& context) override
{
std::vector<String>& history = ms_history[m_prompt];
if (key == Key{Key::Modifiers::Control, 'm'}) // enter
{
std::vector<String>::iterator it;
while ((it = find(history, m_result)) != history.end())
history.erase(it);
history.push_back(m_result);
m_client.print_status("");
// save callback as reset_normal_mode will delete this
PromptCallback callback = std::move(m_callback);
String result = std::move(m_result);
m_client.reset_normal_mode();
// call callback after reset_normal_mode so that callback
// may change the mode
callback(result, context);
return;
}
else if (key == Key::Escape)
{
m_client.print_status("");
m_client.reset_normal_mode();
return;
}
else if (key == Key::Up or
key == Key{Key::Modifiers::Control, 'p'})
{
if (m_history_it != history.begin())
{
if (m_history_it == history.end())
m_saved_result = m_result;
auto it = m_history_it;
// search for the previous history entry matching typed prefix
CharCount prefix_length = m_saved_result.length();
do
{
--it;
if (it->substr(0, prefix_length) == m_saved_result)
{
m_history_it = it;
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m_result = *it;
m_cursor_pos = m_result.length();
break;
}
} while (it != history.begin());
}
}
else if (key == Key::Down or // next
key == Key{Key::Modifiers::Control, 'n'})
{
if (m_history_it != history.end())
{
CharCount prefix_length = m_saved_result.length();
// search for the next history entry matching typed prefix
++m_history_it;
while (m_history_it != history.end() and
m_history_it->substr(0, prefix_length) != m_saved_result)
++m_history_it;
if (m_history_it != history.end())
m_result = *m_history_it;
else
m_result = m_saved_result;
m_cursor_pos = m_result.length();
}
}
else if (key == Key::Left or
key == Key{Key::Modifiers::Control, 'b'})
{
if (m_cursor_pos > 0)
--m_cursor_pos;
}
else if (key == Key::Right or
key == Key{Key::Modifiers::Control, 'f'})
{
if (m_cursor_pos < m_result.length())
++m_cursor_pos;
}
else if (key == Key::Backspace)
{
if (m_cursor_pos != 0)
{
m_result = m_result.substr(0, m_cursor_pos - 1)
+ m_result.substr(m_cursor_pos, String::npos);
--m_cursor_pos;
}
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m_client.menu_hide();
m_current_completion = -1;
}
else if (key == Key(Key::Modifiers::Control, 'r'))
{
Key k = m_client.get_key();
String reg = RegisterManager::instance()[k.key].values(context)[0];
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m_client.menu_hide();
m_current_completion = -1;
m_result = m_result.substr(0, m_cursor_pos) + reg
+ m_result.substr(m_cursor_pos, String::npos);
m_cursor_pos += reg.length();
}
else if (key == Key(Key::Modifiers::Control, 'i') or // tab
key == Key::BackTab)
{
const bool reverse = (key == Key::BackTab);
const CandidateList& candidates = m_completions.candidates;
if (m_current_completion == -1)
{
m_completions = m_completer(context, m_result, m_cursor_pos);
if (candidates.empty())
return;
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m_client.menu_hide();
m_client.menu_show(candidates);
m_completion_prefix = m_result.substr(m_completions.start,
m_completions.end - m_completions.start);
m_completion_count = contains(candidates, m_completion_prefix) ?
(int)candidates.size() : (int)candidates.size() + 1;
}
m_current_completion += reverse ? -1 : 1;
if (m_current_completion >= m_completion_count)
m_current_completion = 0;
else if (m_current_completion < 0)
m_current_completion = m_completion_count-1;
String completion = (m_current_completion == candidates.size()) ?
m_completion_prefix : candidates[m_current_completion];
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m_client.menu_select(m_current_completion);
m_result = m_result.substr(0, m_completions.start) + completion;
m_cursor_pos = m_completions.start + completion.length();
}
else
{
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m_client.menu_hide();
m_current_completion = -1;
m_result = m_result.substr(0, m_cursor_pos) + key.key + m_result.substr(m_cursor_pos, String::npos);
++m_cursor_pos;
}
m_client.print_status(m_prompt + m_result, m_prompt.length() + m_cursor_pos);
}
private:
PromptCallback m_callback;
Completer m_completer;
const String m_prompt;
CharCount m_cursor_pos = 0;
Completions m_completions;
int m_completion_count = 0;
int m_current_completion = -1;
String m_completion_prefix;
String m_result;
String m_saved_result;
static std::unordered_map<String, std::vector<String>> ms_history;
std::vector<String>::iterator m_history_it;
};
std::unordered_map<String, std::vector<String>> Client::PromptMode::ms_history;
class Client::NextKeyMode : public Client::Mode
{
public:
NextKeyMode(Client& client, KeyCallback callback)
: Client::Mode(client), m_callback(callback) {}
void on_key(const Key& key, Context& context) override
{
// save callback as reset_normal_mode will delete this
KeyCallback callback = std::move(m_callback);
m_client.reset_normal_mode();
callback(key, context);
}
private:
KeyCallback m_callback;
};
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class Client::InsertMode : public Client::Mode
{
public:
InsertMode(Client& client, Editor& editor, IncrementalInserter::Mode mode)
: Client::Mode(client), m_inserter(editor, mode)
{
m_client.m_last_insert.first = mode;
m_client.m_last_insert.second.clear();
}
void on_key(const Key& key, Context& context) override
{
m_client.m_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;
}
switch (key.modifiers)
{
case Key::Modifiers::None:
switch (key.key)
{
case Key::Escape:
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m_client.reset_normal_mode();
return;
case Key::Backspace:
m_inserter.erase();
break;
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default:
m_inserter.insert(String() + key.key);
}
break;
case Key::Modifiers::Control:
switch (key.key)
{
case 'r':
m_insert_reg = true;
break;
case 'm':
m_inserter.insert(String() + '\n');
break;
case 'i':
m_inserter.insert(String() + '\t');
break;
case 'd':
m_inserter.move_cursors({0, -1});
break;
case 'e':
m_inserter.move_cursors({0, 1});
break;
}
break;
}
}
private:
bool m_insert_reg = false;
IncrementalInserter m_inserter;
};
Client::Client()
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: m_mode(new NormalMode(*this)),
m_last_insert(IncrementalInserter::Mode::Insert, {})
{
}
void Client::insert(Editor& editor, IncrementalInserter::Mode mode)
{
m_mode.reset(new InsertMode(*this, editor, mode));
}
void Client::repeat_last_insert(Editor& editor, Context& context)
{
if (m_last_insert.second.empty())
return;
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std::vector<Key> keys;
swap(keys, m_last_insert.second);
// m_last_insert will be refilled by the new InsertMode
// this is very inefficient.
m_mode.reset(new InsertMode(*this, editor, m_last_insert.first));
for (auto& key : keys)
m_mode->on_key(key, context);
assert(dynamic_cast<NormalMode*>(m_mode.get()) != nullptr);
}
void Client::prompt(const String& prompt, Completer completer,
PromptCallback callback)
{
m_mode.reset(new PromptMode(*this, prompt, completer, callback));
}
void Client::menu(const memoryview<String>& choices,
MenuCallback callback)
{
m_mode.reset(new MenuMode(*this, choices, callback));
}
void Client::on_next_key(KeyCallback callback)
{
m_mode.reset(new NextKeyMode(*this, callback));
}
void Client::handle_next_input(Context& context)
{
m_mode->on_key(get_key(), context);
context.draw_ifn();
}
void Client::reset_normal_mode()
{
m_mode.reset(new NormalMode(*this));
}
}