kakoune/src/main.cc
2011-10-26 14:18:43 +00:00

641 lines
20 KiB
C++

#include "window.hh"
#include "buffer.hh"
#include "file.hh"
#include "regex_selector.hh"
#include "command_manager.hh"
#include "buffer_manager.hh"
#include "register_manager.hh"
#include "selectors.hh"
#include "assert.hh"
#include "debug.hh"
#include <unordered_map>
#include <map>
#include <sstream>
#include <ncurses.h>
using namespace Kakoune;
using namespace std::placeholders;
void set_attribute(int attribute, bool on)
{
if (on)
attron(attribute);
else
attroff(attribute);
}
int nc_color(Color color)
{
switch (color)
{
case Color::Black: return COLOR_BLACK;
case Color::Red: return COLOR_RED;
case Color::Green: return COLOR_GREEN;
case Color::Yellow: return COLOR_YELLOW;
case Color::Blue: return COLOR_BLUE;
case Color::Magenta: return COLOR_MAGENTA;
case Color::Cyan: return COLOR_CYAN;
case Color::White: return COLOR_WHITE;
case Color::Default:
default:
return COLOR_BLACK;
}
}
void set_color(Color fg_color, Color bg_color)
{
static std::map<std::pair<Color, Color>, int> colorpairs;
static int current_pair = -1;
static int next_pair = 1;
if (current_pair != -1)
attroff(COLOR_PAIR(current_pair));
if (fg_color == Color::Default and bg_color == Color::Default)
return;
std::pair<Color, Color> colorpair(fg_color, bg_color);
auto it = colorpairs.find(colorpair);
if (it != colorpairs.end())
{
current_pair = it->second;
attron(COLOR_PAIR(it->second));
}
else
{
init_pair(next_pair, nc_color(fg_color), nc_color(bg_color));
colorpairs[colorpair] = next_pair;
current_pair = next_pair;
attron(COLOR_PAIR(next_pair));
++next_pair;
}
}
void draw_window(Window& window)
{
int max_x,max_y;
getmaxyx(stdscr, max_y, max_x);
max_y -= 1;
window.set_dimensions(DisplayCoord(max_y, max_x));
window.update_display_buffer();
DisplayCoord position;
for (const DisplayAtom& atom : window.display_buffer())
{
assert(position == atom.coord());
const std::string content = atom.content();
set_attribute(A_UNDERLINE, atom.attribute() & Underline);
set_attribute(A_REVERSE, atom.attribute() & Reverse);
set_attribute(A_BLINK, atom.attribute() & Blink);
set_attribute(A_BOLD, atom.attribute() & Bold);
set_color(atom.fg_color(), atom.bg_color());
size_t pos = 0;
size_t end;
while (true)
{
move(position.line, position.column);
clrtoeol();
end = content.find_first_of('\n', pos);
std::string line = content.substr(pos, end - pos);
addstr(line.c_str());
if (end != std::string::npos)
{
addch(' ');
position.line = position.line + 1;
position.column = 0;
pos = end + 1;
if (position.line >= max_y)
break;
}
else
{
position.column += line.length();
break;
}
}
if (position.line >= max_y)
break;
}
while (++position.line < max_y)
{
move(position.line, 0);
clrtoeol();
addch('~');
}
set_attribute(A_UNDERLINE, 0);
set_attribute(A_REVERSE, 0);
set_attribute(A_BLINK, 0);
set_attribute(A_BOLD, 0);
set_color(Color::Cyan, Color::Black);
std::string status_line = window.status_line();
move(max_y, max_x - status_line.length());
clrtoeol();
addstr(status_line.c_str());
const DisplayCoord& cursor_position = window.cursor_position();
move(cursor_position.line, cursor_position.column);
}
void init_ncurses()
{
initscr();
cbreak();
noecho();
nonl();
intrflush(stdscr, false);
keypad(stdscr, true);
curs_set(2);
start_color();
}
void deinit_ncurses()
{
endwin();
}
struct prompt_aborted {};
std::string prompt(const std::string& text, Completer completer = NullCompletion())
{
int max_x, max_y;
getmaxyx(stdscr, max_y, max_x);
move(max_y-1, 0);
addstr(text.c_str());
clrtoeol();
std::string result;
size_t cursor_pos = 0;
Completions completions;
int current_completion = -1;
std::string text_before_completion;
while (true)
{
char c = getch();
switch (c)
{
case '\r':
return result;
case 4:
if (cursor_pos > 0)
--cursor_pos;
break;
case 5:
if (cursor_pos < result.length())
++cursor_pos;
break;
case 7:
if (cursor_pos != 0)
{
result = result.substr(0, cursor_pos - 1)
+ result.substr(cursor_pos, std::string::npos);
--cursor_pos;
}
current_completion = -1;
break;
case 27:
throw prompt_aborted();
case '\t':
{
if (current_completion == -1)
{
completions = completer(result, cursor_pos);
if (completions.candidates.empty())
break;
text_before_completion = result.substr(completions.start,
completions.end - completions.start);
}
++current_completion;
std::string completion;
if (current_completion >= completions.candidates.size())
{
if (current_completion == completions.candidates.size() and
std::find(completions.candidates.begin(), completions.candidates.end(), text_before_completion) == completions.candidates.end())
completion = text_before_completion;
else
{
current_completion = 0;
completion = completions.candidates[0];
}
}
else
completion = completions.candidates[current_completion];
move(max_y-1, text.length());
result = result.substr(0, completions.start) + completion;
cursor_pos = completions.start + completion.length();
break;
}
default:
current_completion = -1;
result = result.substr(0, cursor_pos) + c + result.substr(cursor_pos, std::string::npos);
++cursor_pos;
}
move(max_y - 1, text.length());
clrtoeol();
addstr(result.c_str());
move(max_y - 1, text.length() + cursor_pos);
refresh();
}
return result;
}
void print_status(const std::string& status)
{
int x,y;
getmaxyx(stdscr, y, x);
move(y-1, 0);
clrtoeol();
addstr(status.c_str());
}
struct scoped_status
{
scoped_status(const std::string& status)
{
print_status(status);
refresh();
}
~scoped_status()
{
print_status("");
refresh();
}
};
void do_insert(Window& window, IncrementalInserter::Mode mode)
{
Kakoune::IncrementalInserter inserter(window, mode);
draw_window(window);
while(true)
{
const DisplayCoord& pos = window.cursor_position();
move(pos.line, pos.column);
char c = getch();
switch (c)
{
case 27:
return;
case 4:
inserter.move_cursor({0, -1});
break;
case 5:
inserter.move_cursor({0, 1});
break;
case 7:
inserter.erase();
break;
case '\r':
c = '\n';
default:
inserter.insert(std::string() + c);
}
draw_window(window);
}
window.clear_selections();
}
template<bool append>
void do_go(Window& window, int count)
{
if (count != 0)
{
BufferIterator target =
window.buffer().iterator_at(BufferCoord(count, 0));
window.move_cursor_to(target);
}
else
{
char c = getch();
switch (c)
{
case 'g':
case 't':
{
BufferIterator target =
window.buffer().iterator_at(BufferCoord(0,0));
window.move_cursor_to(target);
break;
}
case 'l':
case 'L':
window.select(select_to_eol, append);
break;
case 'h':
case 'H':
window.select(select_to_eol_reverse, append);
break;
case 'b':
{
BufferIterator target = window.buffer().iterator_at(
BufferCoord(window.buffer().line_count() - 1, 0));
window.move_cursor_to(target);
break;
}
}
}
}
Window* current_window;
void edit(const CommandParameters& params)
{
if (params.size() != 1)
throw wrong_argument_count();
std::string filename = params[0];
Buffer* buffer = NULL;
try
{
buffer = create_buffer_from_file(filename);
}
catch (file_not_found& what)
{
print_status("new file " + filename);
buffer = new Buffer(filename, Buffer::Type::File);
}
current_window = buffer->get_or_create_window();
}
void write_buffer(const CommandParameters& params)
{
if (params.size() > 1)
throw wrong_argument_count();
Buffer& buffer = current_window->buffer();
std::string filename = params.empty() ? buffer.name() : params[0];
write_buffer_to_file(buffer, filename);
buffer.notify_saved();
}
bool quit_requested = false;
template<bool force>
void quit(const CommandParameters& params)
{
if (params.size() != 0)
throw wrong_argument_count();
if (not force)
{
for (auto& buffer : BufferManager::instance())
{
if (buffer.type() == Buffer::Type::File and buffer.is_modified())
{
print_status("modified buffer remaining");
return;
}
}
}
quit_requested = true;
}
void show_buffer(const CommandParameters& params)
{
if (params.size() != 1)
throw wrong_argument_count();
Buffer* buffer = BufferManager::instance().get_buffer(params[0]);
if (not buffer)
print_status("buffer " + params[0] + " does not exists");
else
current_window = buffer->get_or_create_window();
}
void do_command()
{
try
{
auto cmdline = prompt(":", std::bind(&CommandManager::complete,
&CommandManager::instance(),
_1, _2));
CommandManager::instance().execute(cmdline);
}
catch (prompt_aborted&) {}
}
void do_search(Window& window)
{
try
{
std::string ex = prompt("/");
if (ex.empty())
ex = RegisterManager::instance()['/'];
else
RegisterManager::instance()['/'] = ex;
window.select(RegexSelector(ex));
}
catch (prompt_aborted&) {}
}
void do_search_next(Window& window)
{
std::string& ex = RegisterManager::instance()['/'];
if (not ex.empty())
window.select(RegexSelector(ex));
else
print_status("no search pattern");
}
void do_yank(Window& window, int count)
{
RegisterManager::instance()['"'] = window.selection_content();
window.clear_selections();
}
void do_erase(Window& window, int count)
{
RegisterManager::instance()['"'] = window.selection_content();
window.erase();
window.clear_selections();
}
void do_change(Window& window, int count)
{
RegisterManager::instance()['"'] = window.selection_content();
do_insert(window, IncrementalInserter::Mode::Change);
window.clear_selections();
}
template<bool append>
void do_paste(Window& window, int count)
{
if (append)
window.append(RegisterManager::instance()['"']);
else
window.insert(RegisterManager::instance()['"']);
window.clear_selections();
}
std::unordered_map<char, std::function<void (Window& window, int count)>> keymap =
{
{ 'h', [](Window& window, int count) { window.move_cursor(DisplayCoord(0, -std::max(count,1))); } },
{ 'j', [](Window& window, int count) { window.move_cursor(DisplayCoord( std::max(count,1), 0)); } },
{ 'k', [](Window& window, int count) { window.move_cursor(DisplayCoord(-std::max(count,1), 0)); } },
{ 'l', [](Window& window, int count) { window.move_cursor(DisplayCoord(0, std::max(count,1))); } },
{ 'H', [](Window& window, int count) { window.move_cursor(DisplayCoord(0, -std::max(count,1)), true); } },
{ 'J', [](Window& window, int count) { window.move_cursor(DisplayCoord( std::max(count,1), 0), true); } },
{ 'K', [](Window& window, int count) { window.move_cursor(DisplayCoord(-std::max(count,1), 0), true); } },
{ 'L', [](Window& window, int count) { window.move_cursor(DisplayCoord(0, std::max(count,1)), true); } },
{ 't', [](Window& window, int count) { window.select(std::bind(select_to, _1, getch(), count, false)); } },
{ 'f', [](Window& window, int count) { window.select(std::bind(select_to, _1, getch(), count, true)); } },
{ 'T', [](Window& window, int count) { window.select(std::bind(select_to, _1, getch(), count, false), true); } },
{ 'F', [](Window& window, int count) { window.select(std::bind(select_to, _1, getch(), count, true), true); } },
{ 'd', do_erase },
{ 'c', do_change },
{ 'i', [](Window& window, int count) { do_insert(window, IncrementalInserter::Mode::Insert); } },
{ 'a', [](Window& window, int count) { do_insert(window, IncrementalInserter::Mode::Append); } },
{ 'o', [](Window& window, int count) { do_insert(window, IncrementalInserter::Mode::OpenLineBelow); } },
{ 'O', [](Window& window, int count) { do_insert(window, IncrementalInserter::Mode::OpenLineAbove); } },
{ 'g', do_go<false> },
{ 'G', do_go<true> },
{ 'y', do_yank },
{ 'p', do_paste<true> },
{ 'P', do_paste<false> },
{ '%', [](Window& window, int count) { window.select([](const BufferIterator& cursor)
{ return Selection(cursor.buffer().begin(), cursor.buffer().end()-1); }); } },
{ ':', [](Window& window, int count) { do_command(); } },
{ ' ', [](Window& window, int count) { window.clear_selections(); } },
{ 'w', [](Window& window, int count) { do { window.select(select_to_next_word); } while(--count > 0); } },
{ 'e', [](Window& window, int count) { do { window.select(select_to_next_word_end); } while(--count > 0); } },
{ 'b', [](Window& window, int count) { do { window.select(select_to_previous_word); } while(--count > 0); } },
{ 'W', [](Window& window, int count) { do { window.select(select_to_next_word, true); } while(--count > 0); } },
{ 'E', [](Window& window, int count) { do { window.select(select_to_next_word_end, true); } while(--count > 0); } },
{ 'B', [](Window& window, int count) { do { window.select(select_to_previous_word, true); } while(--count > 0); } },
{ 'x', [](Window& window, int count) { do { window.select(select_line); } while(--count > 0); } },
{ 'X', [](Window& window, int count) { do { window.select(select_line, true); } while(--count > 0); } },
{ 'm', [](Window& window, int count) { window.select(select_matching); } },
{ 'M', [](Window& window, int count) { window.select(select_matching, true); } },
{ '/', [](Window& window, int count) { do_search(window); } },
{ 'n', [](Window& window, int count) { do_search_next(window); } },
{ 'u', [](Window& window, int count) { do { if (not window.undo()) { print_status("nothing left to undo"); break; } } while(--count > 0); } },
{ 'U', [](Window& window, int count) { do { if (not window.redo()) { print_status("nothing left to redo"); break; } } while(--count > 0); } },
};
std::unordered_map<char, std::function<void (Window& window, int count)>> alt_keymap =
{
{ 't', [](Window& window, int count) { window.select(std::bind(select_to_reverse, _1, getch(), count, false)); } },
{ 'f', [](Window& window, int count) { window.select(std::bind(select_to_reverse, _1, getch(), count, true)); } },
{ 'T', [](Window& window, int count) { window.select(std::bind(select_to_reverse, _1, getch(), count, false), true); } },
{ 'F', [](Window& window, int count) { window.select(std::bind(select_to_reverse, _1, getch(), count, true), true); } },
{ 'w', [](Window& window, int count) { do { window.select(select_to_next_WORD); } while(--count > 0); } },
{ 'e', [](Window& window, int count) { do { window.select(select_to_next_WORD_end); } while(--count > 0); } },
{ 'b', [](Window& window, int count) { do { window.select(select_to_previous_WORD); } while(--count > 0); } },
{ 'W', [](Window& window, int count) { do { window.select(select_to_next_WORD, true); } while(--count > 0); } },
{ 'E', [](Window& window, int count) { do { window.select(select_to_next_WORD_end, true); } while(--count > 0); } },
{ 'B', [](Window& window, int count) { do { window.select(select_to_previous_WORD, true); } while(--count > 0); } },
};
int main(int argc, char* argv[])
{
init_ncurses();
CommandManager command_manager;
BufferManager buffer_manager;
RegisterManager register_manager;
command_manager.register_command(std::vector<std::string>{ "e", "edit" }, edit,
PerArgumentCommandCompleter{ complete_filename });
command_manager.register_command(std::vector<std::string>{ "q", "quit" }, quit<false>);
command_manager.register_command(std::vector<std::string>{ "q!", "quit!" }, quit<true>);
command_manager.register_command(std::vector<std::string>{ "w", "write" }, write_buffer,
PerArgumentCommandCompleter{ complete_filename });
command_manager.register_command(std::vector<std::string>{ "b", "buffer" }, show_buffer,
PerArgumentCommandCompleter { complete_buffername });
try
{
auto buffer = (argc > 1) ? create_buffer_from_file(argv[1]) : new Buffer("*scratch*", Buffer::Type::Scratch);
current_window = buffer->get_or_create_window();
draw_window(*current_window);
int count = 0;
while(not quit_requested)
{
try
{
char c = getch();
std::ostringstream oss;
oss << "key " << int(c) << " (" << c << ")\n";
write_debug(oss.str());
if (isdigit(c))
count = count * 10 + c - '0';
else
{
bool is_alt = false;
if (c == 27)
{
timeout(0);
char new_c = getch();
timeout(-1);
if (new_c != ERR)
{
c = new_c;
is_alt = true;
}
}
auto& active_keymap = is_alt ? alt_keymap : keymap;
if (active_keymap.find(c) != active_keymap.end())
{
active_keymap[c](*current_window, count);
draw_window(*current_window);
}
count = 0;
}
}
catch (Kakoune::runtime_error& error)
{
print_status(error.description());
}
}
deinit_ncurses();
}
catch (Kakoune::exception& error)
{
deinit_ncurses();
puts("uncaught exception:\n");
puts(error.description().c_str());
return -1;
}
catch (...)
{
deinit_ncurses();
throw;
}
return 0;
}