kakoune/src/commands.cc

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#include "commands.hh"
#include "command_manager.hh"
#include "buffer_manager.hh"
#include "option_manager.hh"
#include "context.hh"
#include "buffer.hh"
#include "window.hh"
#include "file.hh"
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#include "input_handler.hh"
#include "string.hh"
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#include "highlighter_registry.hh"
#include "filter_registry.hh"
#include "register_manager.hh"
#include "completion.hh"
#include "shell_manager.hh"
#include "event_manager.hh"
#include "color_registry.hh"
#include "client_manager.hh"
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#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
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namespace Kakoune
{
using namespace std::placeholders;
// berk
extern bool quit_requested;
namespace
{
struct unknown_option : public runtime_error
{
unknown_option(const String& name)
: runtime_error("unknown option '" + name + "'") {}
};
struct missing_option_value: public runtime_error
{
missing_option_value(const String& name)
: runtime_error("missing value for option '" + name + "'") {}
};
// ParameterParser provides tools to parse command parameters.
// There are 3 types of parameters:
// * unnamed options, which are accessed by position (ignoring named ones)
// * named boolean options, which are enabled using '-name' syntax
// * named string options, which are defined using '-name value' syntax
struct ParametersParser
{
// the options defines named options, if they map to true, then
// they are understood as string options, else they are understood as
// boolean option.
ParametersParser(const CommandParameters& params,
std::unordered_map<String, bool> options)
: m_params(params), m_positional(params.size(), true), m_options(options)
{
for (size_t i = 0; i < params.size(); ++i)
{
if (params[i][0] == '-')
{
auto it = options.find(params[i].substr(1_byte));
if (it == options.end())
throw unknown_option(params[i]);
if (it->second)
{
if (i + 1 == params.size() or params[i+1][0] == '-')
throw missing_option_value(params[i]);
m_positional[i+1] = false;
}
m_positional[i] = false;
}
// all options following -- are positional
if (params[i] == "--")
break;
}
}
// check if a named option (either string or boolean) is specified
bool has_option(const String& name) const
{
assert(m_options.find(name) != m_options.end());
for (auto& param : m_params)
{
if (param[0] == '-' and param.substr(1_byte) == name)
return true;
if (param == "--")
break;
}
return false;
}
// get a string option value, returns an empty string if the option
// is not defined
const String& option_value(const String& name) const
{
auto it = m_options.find(name);
assert(it != m_options.end());
assert(it->second == true);
for (size_t i = 0; i < m_params.size(); ++i)
{
if (m_params[i][0] == '-' and m_params[i].substr(1_byte) == name)
return m_params[i+1];
if (m_params[i] == "--")
break;
}
static String empty;
return empty;
}
size_t positional_count() const
{
size_t res = 0;
for (bool positional : m_positional)
{
if (positional)
++res;
}
return res;
}
struct iterator
{
public:
typedef String value_type;
typedef const value_type* pointer;
typedef const value_type& reference;
typedef size_t difference_type;
typedef std::forward_iterator_tag iterator_category;
iterator(const ParametersParser& parser, size_t index)
: m_parser(parser), m_index(index) {}
const String& operator*() const
{
assert(m_parser.m_positional[m_index]);
return m_parser.m_params[m_index];
}
const String* operator->() const
{
assert(m_parser.m_positional[m_index]);
return &m_parser.m_params[m_index];
}
iterator& operator++()
{
while (m_index < m_parser.m_positional.size() and
not m_parser.m_positional[++m_index]) {}
return *this;
}
bool operator==(const iterator& other) const
{
return &m_parser == &other.m_parser and m_index == other.m_index;
}
bool operator!=(const iterator& other) const
{
return &m_parser != &other.m_parser or m_index != other.m_index;
}
bool operator<(const iterator& other) const
{
assert(&m_parser == &other.m_parser);
return m_index < other.m_index;
}
private:
const ParametersParser& m_parser;
size_t m_index;
};
// positional parameter begin
iterator begin() const
{
int index = 0;
while (index < m_positional.size() and not m_positional[index])
++index;
return iterator(*this, index);
}
// positional parameter end
iterator end() const
{
return iterator(*this, m_params.size());
}
// access positional parameter by index
const String& operator[] (size_t index) const
{
assert(index < positional_count());
iterator it = begin();
while (index)
{
++it;
--index;
}
return *it;
}
private:
const CommandParameters& m_params;
std::vector<bool> m_positional;
std::unordered_map<String, bool> m_options;
};
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Buffer* open_or_create(const String& filename, Context& context)
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{
Buffer* buffer = create_buffer_from_file(filename);
if (not buffer)
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{
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context.print_status("new file " + filename);
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buffer = new Buffer(filename, Buffer::Type::NewFile);
}
return buffer;
}
Buffer* open_fifo(const String& name , const String& filename, Context& context)
{
int fd = open(filename.c_str(), O_RDONLY);
if (fd < 0)
throw runtime_error("unable to open " + filename);
Buffer* buffer = new Buffer(name, Buffer::Type::Scratch);
buffer->hook_manager().add_hook(
"BufClose", [=](const String&, const Context&)
{ EventManager::instance().unwatch(fd); close(fd); }
);
EventManager::instance().watch(fd, [buffer](int fd) {
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char data[4096];
ssize_t count = read(fd, data, 4096);
buffer->insert(buffer->end()-1,
count > 0 ? String(data, data+count)
: "*** kak: fifo closed ***\n");
buffer->reset_undo_data();
ClientManager::instance().redraw_clients();
if (count <= 0)
{
close(fd);
EventManager::instance().unwatch(fd);
}
});
return buffer;
}
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template<bool force_reload>
void edit(const CommandParameters& params, Context& context)
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{
ParametersParser parser(params, { { "scratch", false },
{ "fifo", true } });
const size_t param_count = parser.positional_count();
if (param_count == 0 or param_count > 3)
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throw wrong_argument_count();
const String& name = parser[0];
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Buffer* buffer = nullptr;
if (not force_reload)
buffer = BufferManager::instance().get_buffer(name);
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if (not buffer)
{
if (parser.has_option("scratch"))
buffer = new Buffer(name, Buffer::Type::Scratch);
else if (parser.has_option("fifo"))
buffer = open_fifo(name, parser.option_value("fifo"), context);
else
buffer = open_or_create(name, context);
}
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BufferManager::instance().set_last_used_buffer(*buffer);
if (buffer != &context.buffer() or param_count > 1)
context.push_jump();
if (buffer != &context.buffer())
{
auto& manager = ClientManager::instance();
context.change_editor(manager.get_unused_window_for_buffer(*buffer));
}
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if (param_count > 1)
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{
int line = std::max(0, str_to_int(parser[1]) - 1);
int column = param_count > 2 ?
std::max(0, str_to_int(parser[2]) - 1) : 0;
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context.editor().select(context.buffer().iterator_at({ line, column }));
if (context.has_window())
context.window().center_selection();
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}
}
void write_buffer(const CommandParameters& params, Context& context)
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{
if (params.size() > 1)
throw wrong_argument_count();
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Buffer& buffer = context.buffer();
if (params.empty() and buffer.type() == Buffer::Type::Scratch)
throw runtime_error("cannot write scratch buffer without a filename");
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String filename = params.empty() ? buffer.name()
: parse_filename(params[0]);
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write_buffer_to_file(buffer, filename);
buffer.notify_saved();
}
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void write_all_buffers(const CommandParameters& params, Context& context)
{
if (params.size() != 0)
throw wrong_argument_count();
for (auto& buffer : BufferManager::instance())
{
if (buffer->type() != Buffer::Type::Scratch and buffer->is_modified())
{
write_buffer_to_file(*buffer, buffer->name());
buffer->notify_saved();
}
}
}
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template<bool force>
void quit(const CommandParameters& params, Context& context)
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{
if (params.size() != 0)
throw wrong_argument_count();
if (not force and ClientManager::instance().count() == 1)
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{
std::vector<String> names;
for (auto& buffer : BufferManager::instance())
{
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if (buffer->type() != Buffer::Type::Scratch and buffer->is_modified())
names.push_back(buffer->name());
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}
if (not names.empty())
{
String message = "modified buffers remaining: [";
for (auto it = names.begin(); it != names.end(); ++it)
{
if (it != names.begin())
message += ", ";
message += *it;
}
message += "]";
throw runtime_error(message);
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}
}
// unwind back to this client event handler.
throw client_removed{};
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}
template<bool force>
void write_and_quit(const CommandParameters& params, Context& context)
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{
write_buffer(params, context);
quit<force>(CommandParameters(), context);
}
void show_buffer(const CommandParameters& params, Context& context)
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{
if (params.size() != 1)
throw wrong_argument_count();
const String& buffer_name = params[0];
Buffer* buffer = BufferManager::instance().get_buffer(buffer_name);
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if (not buffer)
throw runtime_error("buffer " + buffer_name + " does not exists");
BufferManager::instance().set_last_used_buffer(*buffer);
if (buffer != &context.buffer())
{
context.push_jump();
auto& manager = ClientManager::instance();
context.change_editor(manager.get_unused_window_for_buffer(*buffer));
}
}
void delete_buffer(const CommandParameters& params, Context& context)
{
if (params.size() > 1)
throw wrong_argument_count();
BufferManager& manager = BufferManager::instance();
Buffer* buffer = nullptr;
if (params.empty())
buffer = &context.buffer();
else
{
const String& buffer_name = params[0];
buffer = manager.get_buffer(buffer_name);
if (not buffer)
throw runtime_error("buffer " + buffer_name + " does not exists");
}
if (buffer->type()!= Buffer::Type::Scratch and buffer->is_modified())
throw runtime_error("buffer " + buffer->name() + " is modified");
if (manager.count() == 1)
throw runtime_error("buffer " + buffer->name() + " is the last one");
ClientManager::instance().ensure_no_client_uses_buffer(*buffer);
delete buffer;
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}
void add_highlighter(const CommandParameters& params, Context& context)
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{
ParametersParser parser(params, { { "group", true } });
if (parser.positional_count() < 1)
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throw wrong_argument_count();
HighlighterRegistry& registry = HighlighterRegistry::instance();
auto begin = parser.begin();
const String& name = *begin;
std::vector<String> highlighter_params;
for (++begin; begin != parser.end(); ++begin)
highlighter_params.push_back(*begin);
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Window& window = context.window();
HighlighterGroup& group = parser.has_option("group") ?
window.highlighters().get_group(parser.option_value("group"))
: window.highlighters();
registry.add_highlighter_to_group(window, group, name,
highlighter_params);
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}
void rm_highlighter(const CommandParameters& params, Context& context)
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{
ParametersParser parser(params, { { "group", true } });
if (parser.positional_count() != 1)
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throw wrong_argument_count();
Window& window = context.window();
HighlighterGroup& group = parser.has_option("group") ?
window.highlighters().get_group(parser.option_value("group"))
: window.highlighters();
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group.remove(parser[0]);
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}
void add_filter(const CommandParameters& params, Context& context)
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{
ParametersParser parser(params, { { "group", true } });
if (parser.positional_count() < 1)
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throw wrong_argument_count();
FilterRegistry& registry = FilterRegistry::instance();
auto begin = parser.begin();
const String& name = *begin;
std::vector<String> filter_params;
for (++begin; begin != parser.end(); ++begin)
filter_params.push_back(*begin);
Editor& editor = context.editor();
FilterGroup& group = parser.has_option("group") ?
editor.filters().get_group(parser.option_value("group"))
: editor.filters();
registry.add_filter_to_group(group, name, filter_params);
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}
void rm_filter(const CommandParameters& params, Context& context)
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{
ParametersParser parser(params, { { "group", true } });
if (parser.positional_count() != 1)
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throw wrong_argument_count();
Editor& editor = context.editor();
FilterGroup& group = parser.has_option("group") ?
editor.filters().get_group(parser.option_value("group"))
: editor.filters();
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group.remove(parser[0]);
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}
void add_hook(const CommandParameters& params, Context& context)
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{
if (params.size() != 4)
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throw wrong_argument_count();
// copy so that the lambda gets a copy as well
Regex regex(params[2].begin(), params[2].end());
String command = params[3];
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auto hook_func = [=](const String& param, const Context& context) {
if (boost::regex_match(param.begin(), param.end(), regex))
{
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Context new_context(context.editor());
CommandManager::instance().execute(command, new_context);
}
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};
const String& scope = params[0];
const String& name = params[1];
if (scope == "global")
GlobalHookManager::instance().add_hook(name, hook_func);
else if (scope == "buffer")
context.buffer().hook_manager().add_hook(name, hook_func);
else if (scope == "window")
context.window().hook_manager().add_hook(name , hook_func);
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else
throw runtime_error("error: no such hook container " + scope);
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}
EnvVarMap params_to_env_var_map(const CommandParameters& params)
{
std::unordered_map<String, String> vars;
char param_name[] = "param0";
for (size_t i = 0; i < params.size(); ++i)
{
param_name[sizeof(param_name) - 2] = '0' + i;
vars[param_name] = params[i];
}
return vars;
}
void define_command(const CommandParameters& params, Context& context)
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{
ParametersParser parser(params,
{ { "env-params", false },
{ "shell-params", false },
{ "allow-override", false },
{ "file-completion", false },
{ "shell-completion", true } });
if (parser.positional_count() != 2)
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throw wrong_argument_count();
auto begin = parser.begin();
const String& cmd_name = *begin;
if (CommandManager::instance().command_defined(cmd_name) and
not parser.has_option("allow-override"))
throw runtime_error("command '" + cmd_name + "' already defined");
String commands = parser[1];
Command cmd;
if (parser.has_option("env-params"))
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{
cmd = [=](const CommandParameters& params, Context& context) {
CommandManager::instance().execute(commands, context, {},
params_to_env_var_map(params));
};
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}
if (parser.has_option("shell-params"))
{
cmd = [=](const CommandParameters& params, Context& context) {
CommandManager::instance().execute(commands, context, params, {});
};
}
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else
{
cmd = [=](const CommandParameters& params, Context& context) {
if (not params.empty())
throw wrong_argument_count();
CommandManager::instance().execute(commands, context);
};
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}
CommandCompleter completer;
if (parser.has_option("file-completion"))
{
completer = [](const Context& context, const CommandParameters& params,
size_t token_to_complete, ByteCount pos_in_token)
{
const String& prefix = token_to_complete < params.size() ?
params[token_to_complete] : String();
return complete_filename(context, prefix, pos_in_token);
};
}
else if (parser.has_option("shell-completion"))
{
String shell_cmd = parser.option_value("shell-completion");
completer = [=](const Context& context, const CommandParameters& params,
size_t token_to_complete, ByteCount pos_in_token)
{
EnvVarMap vars = {
{"token_to_complete", int_to_str(token_to_complete) },
{ "pos_in_token", int_to_str((int)pos_in_token) }
};
String output = ShellManager::instance().eval(shell_cmd, context, params, vars);
return split(output, '\n');
};
}
CommandManager::instance().register_command(cmd_name, cmd, completer);
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}
void echo_message(const CommandParameters& params, Context& context)
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{
String message;
for (auto& param : params)
message += param + " ";
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context.print_status(message);
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}
void exec_commands_in_file(const CommandParameters& params,
Context& context)
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{
if (params.size() != 1)
throw wrong_argument_count();
String file_content = read_file(parse_filename(params[0]));
CommandManager::instance().execute(file_content, context);
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}
void set_option(OptionManager& option_manager, const CommandParameters& params,
Context& context)
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{
if (params.size() != 2)
throw wrong_argument_count();
option_manager.set_option(params[0], Option(params[1]));
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}
class RegisterRestorer
{
public:
RegisterRestorer(char name, const Context& context)
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: m_name(name)
{
memoryview<String> save = RegisterManager::instance()[name].values(context);
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m_save = std::vector<String>(save.begin(), save.end());
}
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~RegisterRestorer()
{ RegisterManager::instance()[m_name] = m_save; }
private:
std::vector<String> m_save;
char m_name;
};
class BatchUI : public UserInterface
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{
public:
BatchUI(const KeyList& keys)
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: m_keys(keys), m_pos(0) {}
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Key get_key() override
{
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assert(m_pos < m_keys.size());
return m_keys[m_pos++];
}
bool is_key_available() override { return m_pos < m_keys.size(); }
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void print_status(const String& , CharCount) override {}
void draw(const DisplayBuffer&, const String&) override {}
void menu_show(const memoryview<String>&,
const DisplayCoord&, MenuStyle) override {}
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void menu_select(int) override {}
void menu_hide() override {}
DisplayCoord dimensions() override { return { 0, 0 }; }
private:
const KeyList& m_keys;
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size_t m_pos;
};
void exec_keys(const KeyList& keys, Context& context)
{
RegisterRestorer quote('"', context);
RegisterRestorer slash('/', context);
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BatchUI batch_ui(keys);
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InputHandler batch_input_handler;
scoped_edition edition(context.editor());
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Context new_context(batch_input_handler, context.editor(), batch_ui);
batch_input_handler.handle_available_inputs(new_context);
context.change_editor(new_context.editor());
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}
void exec_string(const CommandParameters& params, Context& context)
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{
if (params.empty())
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throw wrong_argument_count();
KeyList keys;
for (auto& param : params)
{
KeyList param_keys = parse_keys(param);
keys.insert(keys.end(), param_keys.begin(), param_keys.end());
}
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exec_keys(keys, context);
}
void menu(const CommandParameters& params, Context& context)
{
ParametersParser parser(params, { { "auto-single", false } });
size_t count = parser.positional_count();
if (count == 0 or (count % 2) != 0)
throw wrong_argument_count();
if (count == 2 and parser.has_option("auto-single"))
{
CommandManager::instance().execute(parser[1], context);
return;
}
std::vector<String> choices;
std::vector<String> commands;
for (int i = 0; i < count; i += 2)
{
choices.push_back(parser[i]);
commands.push_back(parser[i+1]);
}
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context.input_handler().menu(choices,
[=](int choice, Context& context) {
if (choice >= 0 and choice < commands.size())
CommandManager::instance().execute(commands[choice], context);
}, context);
}
void try_catch(const CommandParameters& params, Context& context)
{
if (params.size() != 3)
throw wrong_argument_count();
if (params[1] != "catch")
throw runtime_error("try needs a catch");
CommandManager& command_manager = CommandManager::instance();
try
{
command_manager.execute(params[0], context);
}
catch (Kakoune::runtime_error& e)
{
command_manager.execute(params[2], context);
}
}
void define_color_alias(const CommandParameters& params, Context& context)
{
ParametersParser parser(params, { { "allow-override", false } });
if (parser.positional_count() != 2)
throw wrong_argument_count();
ColorRegistry::instance().register_alias(
parser[0], parser[1], parser.has_option("allow-override"));
}
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}
void register_commands()
{
CommandManager& cm = CommandManager::instance();
PerArgumentCommandCompleter filename_completer({ complete_filename });
cm.register_commands({ "e", "edit" }, edit<false>, filename_completer);
cm.register_commands({ "e!", "edit!" }, edit<true>, filename_completer);
cm.register_commands({ "w", "write" }, write_buffer, filename_completer);
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cm.register_commands({ "wa", "writeall" }, write_all_buffers);
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cm.register_commands({ "q", "quit" }, quit<false>);
cm.register_commands({ "q!", "quit!" }, quit<true>);
cm.register_command("wq", write_and_quit<false>);
cm.register_command("wq!", write_and_quit<true>);
PerArgumentCommandCompleter buffer_completer({
[](const Context& context, const String& prefix, ByteCount cursor_pos)
{ return BufferManager::instance().complete_buffername(prefix, cursor_pos); }
});
cm.register_commands({ "b", "buffer" }, show_buffer, buffer_completer);
cm.register_commands({ "db", "delbuf" }, delete_buffer, buffer_completer);
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cm.register_commands({ "ah", "addhl" }, add_highlighter,
[](const Context& context, const CommandParameters& params,
size_t token_to_complete, ByteCount pos_in_token)
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{
Window& w = context.window();
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const String& arg = token_to_complete < params.size() ?
params[token_to_complete] : String();
if (token_to_complete == 1 and params[0] == "-group")
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return w.highlighters().complete_group_id(arg, pos_in_token);
else if (token_to_complete == 0 or (token_to_complete == 2 and params[0] == "-group"))
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return HighlighterRegistry::instance().complete_highlighter(arg, pos_in_token);
else
return CandidateList();
});
cm.register_commands({ "rh", "rmhl" }, rm_highlighter,
[](const Context& context, const CommandParameters& params,
size_t token_to_complete, ByteCount pos_in_token)
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{
Window& w = context.window();
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const String& arg = token_to_complete < params.size() ?
params[token_to_complete] : String();
if (token_to_complete == 1 and params[0] == "-group")
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return w.highlighters().complete_group_id(arg, pos_in_token);
else if (token_to_complete == 2 and params[0] == "-group")
return w.highlighters().get_group(params[1]).complete_id(arg, pos_in_token);
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else
return w.highlighters().complete_id(arg, pos_in_token);
});
cm.register_commands({ "af", "addfilter" }, add_filter,
[](const Context& context, const CommandParameters& params,
size_t token_to_complete, ByteCount pos_in_token)
{
Window& w = context.window();
const String& arg = token_to_complete < params.size() ?
params[token_to_complete] : String();
if (token_to_complete == 1 and params[0] == "-group")
return w.filters().complete_group_id(arg, pos_in_token);
else if (token_to_complete == 0 or (token_to_complete == 2 and params[0] == "-group"))
return FilterRegistry::instance().complete_filter(arg, pos_in_token);
else
return CandidateList();
});
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cm.register_commands({ "rf", "rmfilter" }, rm_filter,
[](const Context& context, const CommandParameters& params,
size_t token_to_complete, ByteCount pos_in_token)
{
Window& w = context.window();
const String& arg = token_to_complete < params.size() ?
params[token_to_complete] : String();
if (token_to_complete == 1 and params[0] == "-group")
return w.filters().complete_group_id(arg, pos_in_token);
else if (token_to_complete == 2 and params[0] == "-group")
return w.filters().get_group(params[1]).complete_id(arg, pos_in_token);
else
return w.filters().complete_id(arg, pos_in_token);
});
cm.register_command("hook", add_hook);
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cm.register_command("source", exec_commands_in_file, filename_completer);
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cm.register_command("exec", exec_string);
cm.register_command("menu", menu);
cm.register_command("try", try_catch);
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cm.register_command("def", define_command);
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cm.register_command("echo", echo_message);
cm.register_commands({ "setg", "setglobal" },
[](const CommandParameters& params, Context& context)
{ set_option(GlobalOptionManager::instance(), params, context); },
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PerArgumentCommandCompleter({
[](const Context& context, const String& prefix, ByteCount cursor_pos)
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{ return GlobalOptionManager::instance().complete_option_name(prefix, cursor_pos); }
}));
cm.register_commands({ "setb", "setbuffer" },
[](const CommandParameters& params, Context& context)
{ set_option(context.buffer().option_manager(), params, context); },
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PerArgumentCommandCompleter({
[](const Context& context, const String& prefix, ByteCount cursor_pos)
{ return context.buffer().option_manager().complete_option_name(prefix, cursor_pos); }
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}));
cm.register_commands({ "setw", "setwindow" },
[](const CommandParameters& params, Context& context)
{ set_option(context.window().option_manager(), params, context); },
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PerArgumentCommandCompleter({
[](const Context& context, const String& prefix, ByteCount cursor_pos)
{ return context.window().option_manager().complete_option_name(prefix, cursor_pos); }
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}));
cm.register_commands({"ca", "colalias"}, define_color_alias);
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}
}