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#include "ncurses_ui.hh"
#include "containers.hh"
#include "display_buffer.hh"
#include "event_manager.hh"
#include "keys.hh"
#include <algorithm>
#define NCURSES_OPAQUE 0
#define NCURSES_INTERNALS
#include <ncurses.h>
#include <fcntl.h>
#include <signal.h>
#include <sys/ioctl.h>
#include <termios.h>
#include <unistd.h>
constexpr char control(char c) { return c & 037; }
namespace Kakoune
{
using std::min;
using std::max;
struct NCursesWin : WINDOW {};
static constexpr StringView assistant_cat[] =
{ R"( ___ )",
R"( (__ \ )",
R"( / / ╭)",
R"( .' '·. │)",
R"( ' ” │)",
R"( ╰ /\_/| │)",
R"( | . \ │)",
R"( ╰_J` | | | ╯)",
R"( ' \__- _/ )",
R"( \_\ \_\ )",
R"( )"};
static constexpr StringView assistant_clippy[] =
{ " ╭──╮ ",
" │ │ ",
" @ @ ╭",
" ││ ││ │",
" ││ ││ ╯",
" │╰─╯│ ",
" ╰───╯ ",
" " };
static void set_attribute(WINDOW* window, int attribute, bool on)
{
if (on)
wattron(window, attribute);
else
wattroff(window, attribute);
}
template<typename T> T sq(T x) { return x * x; }
constexpr struct { unsigned char r, g, b; } builtin_colors[] = {
{0x00,0x00,0x00}, {0x80,0x00,0x00}, {0x00,0x80,0x00}, {0x80,0x80,0x00},
{0x00,0x00,0x80}, {0x80,0x00,0x80}, {0x00,0x80,0x80}, {0xc0,0xc0,0xc0},
{0x80,0x80,0x80}, {0xff,0x00,0x00}, {0x00,0xff,0x00}, {0xff,0xff,0x00},
{0x00,0x00,0xff}, {0xff,0x00,0xff}, {0x00,0xff,0xff}, {0xff,0xff,0xff},
{0x00,0x00,0x00}, {0x00,0x00,0x5f}, {0x00,0x00,0x87}, {0x00,0x00,0xaf},
{0x00,0x00,0xd7}, {0x00,0x00,0xff}, {0x00,0x5f,0x00}, {0x00,0x5f,0x5f},
{0x00,0x5f,0x87}, {0x00,0x5f,0xaf}, {0x00,0x5f,0xd7}, {0x00,0x5f,0xff},
{0x00,0x87,0x00}, {0x00,0x87,0x5f}, {0x00,0x87,0x87}, {0x00,0x87,0xaf},
{0x00,0x87,0xd7}, {0x00,0x87,0xff}, {0x00,0xaf,0x00}, {0x00,0xaf,0x5f},
{0x00,0xaf,0x87}, {0x00,0xaf,0xaf}, {0x00,0xaf,0xd7}, {0x00,0xaf,0xff},
{0x00,0xd7,0x00}, {0x00,0xd7,0x5f}, {0x00,0xd7,0x87}, {0x00,0xd7,0xaf},
{0x00,0xd7,0xd7}, {0x00,0xd7,0xff}, {0x00,0xff,0x00}, {0x00,0xff,0x5f},
{0x00,0xff,0x87}, {0x00,0xff,0xaf}, {0x00,0xff,0xd7}, {0x00,0xff,0xff},
{0x5f,0x00,0x00}, {0x5f,0x00,0x5f}, {0x5f,0x00,0x87}, {0x5f,0x00,0xaf},
{0x5f,0x00,0xd7}, {0x5f,0x00,0xff}, {0x5f,0x5f,0x00}, {0x5f,0x5f,0x5f},
{0x5f,0x5f,0x87}, {0x5f,0x5f,0xaf}, {0x5f,0x5f,0xd7}, {0x5f,0x5f,0xff},
{0x5f,0x87,0x00}, {0x5f,0x87,0x5f}, {0x5f,0x87,0x87}, {0x5f,0x87,0xaf},
{0x5f,0x87,0xd7}, {0x5f,0x87,0xff}, {0x5f,0xaf,0x00}, {0x5f,0xaf,0x5f},
{0x5f,0xaf,0x87}, {0x5f,0xaf,0xaf}, {0x5f,0xaf,0xd7}, {0x5f,0xaf,0xff},
{0x5f,0xd7,0x00}, {0x5f,0xd7,0x5f}, {0x5f,0xd7,0x87}, {0x5f,0xd7,0xaf},
{0x5f,0xd7,0xd7}, {0x5f,0xd7,0xff}, {0x5f,0xff,0x00}, {0x5f,0xff,0x5f},
{0x5f,0xff,0x87}, {0x5f,0xff,0xaf}, {0x5f,0xff,0xd7}, {0x5f,0xff,0xff},
{0x87,0x00,0x00}, {0x87,0x00,0x5f}, {0x87,0x00,0x87}, {0x87,0x00,0xaf},
{0x87,0x00,0xd7}, {0x87,0x00,0xff}, {0x87,0x5f,0x00}, {0x87,0x5f,0x5f},
{0x87,0x5f,0x87}, {0x87,0x5f,0xaf}, {0x87,0x5f,0xd7}, {0x87,0x5f,0xff},
{0x87,0x87,0x00}, {0x87,0x87,0x5f}, {0x87,0x87,0x87}, {0x87,0x87,0xaf},
{0x87,0x87,0xd7}, {0x87,0x87,0xff}, {0x87,0xaf,0x00}, {0x87,0xaf,0x5f},
{0x87,0xaf,0x87}, {0x87,0xaf,0xaf}, {0x87,0xaf,0xd7}, {0x87,0xaf,0xff},
{0x87,0xd7,0x00}, {0x87,0xd7,0x5f}, {0x87,0xd7,0x87}, {0x87,0xd7,0xaf},
{0x87,0xd7,0xd7}, {0x87,0xd7,0xff}, {0x87,0xff,0x00}, {0x87,0xff,0x5f},
{0x87,0xff,0x87}, {0x87,0xff,0xaf}, {0x87,0xff,0xd7}, {0x87,0xff,0xff},
{0xaf,0x00,0x00}, {0xaf,0x00,0x5f}, {0xaf,0x00,0x87}, {0xaf,0x00,0xaf},
{0xaf,0x00,0xd7}, {0xaf,0x00,0xff}, {0xaf,0x5f,0x00}, {0xaf,0x5f,0x5f},
{0xaf,0x5f,0x87}, {0xaf,0x5f,0xaf}, {0xaf,0x5f,0xd7}, {0xaf,0x5f,0xff},
{0xaf,0x87,0x00}, {0xaf,0x87,0x5f}, {0xaf,0x87,0x87}, {0xaf,0x87,0xaf},
{0xaf,0x87,0xd7}, {0xaf,0x87,0xff}, {0xaf,0xaf,0x00}, {0xaf,0xaf,0x5f},
{0xaf,0xaf,0x87}, {0xaf,0xaf,0xaf}, {0xaf,0xaf,0xd7}, {0xaf,0xaf,0xff},
{0xaf,0xd7,0x00}, {0xaf,0xd7,0x5f}, {0xaf,0xd7,0x87}, {0xaf,0xd7,0xaf},
{0xaf,0xd7,0xd7}, {0xaf,0xd7,0xff}, {0xaf,0xff,0x00}, {0xaf,0xff,0x5f},
{0xaf,0xff,0x87}, {0xaf,0xff,0xaf}, {0xaf,0xff,0xd7}, {0xaf,0xff,0xff},
{0xd7,0x00,0x00}, {0xd7,0x00,0x5f}, {0xd7,0x00,0x87}, {0xd7,0x00,0xaf},
{0xd7,0x00,0xd7}, {0xd7,0x00,0xff}, {0xd7,0x5f,0x00}, {0xd7,0x5f,0x5f},
{0xd7,0x5f,0x87}, {0xd7,0x5f,0xaf}, {0xd7,0x5f,0xd7}, {0xd7,0x5f,0xff},
{0xd7,0x87,0x00}, {0xd7,0x87,0x5f}, {0xd7,0x87,0x87}, {0xd7,0x87,0xaf},
{0xd7,0x87,0xd7}, {0xd7,0x87,0xff}, {0xd7,0xaf,0x00}, {0xd7,0xaf,0x5f},
{0xd7,0xaf,0x87}, {0xd7,0xaf,0xaf}, {0xd7,0xaf,0xd7}, {0xd7,0xaf,0xff},
{0xd7,0xd7,0x00}, {0xd7,0xd7,0x5f}, {0xd7,0xd7,0x87}, {0xd7,0xd7,0xaf},
{0xd7,0xd7,0xd7}, {0xd7,0xd7,0xff}, {0xd7,0xff,0x00}, {0xd7,0xff,0x5f},
{0xd7,0xff,0x87}, {0xd7,0xff,0xaf}, {0xd7,0xff,0xd7}, {0xd7,0xff,0xff},
{0xff,0x00,0x00}, {0xff,0x00,0x5f}, {0xff,0x00,0x87}, {0xff,0x00,0xaf},
{0xff,0x00,0xd7}, {0xff,0x00,0xff}, {0xff,0x5f,0x00}, {0xff,0x5f,0x5f},
{0xff,0x5f,0x87}, {0xff,0x5f,0xaf}, {0xff,0x5f,0xd7}, {0xff,0x5f,0xff},
{0xff,0x87,0x00}, {0xff,0x87,0x5f}, {0xff,0x87,0x87}, {0xff,0x87,0xaf},
{0xff,0x87,0xd7}, {0xff,0x87,0xff}, {0xff,0xaf,0x00}, {0xff,0xaf,0x5f},
{0xff,0xaf,0x87}, {0xff,0xaf,0xaf}, {0xff,0xaf,0xd7}, {0xff,0xaf,0xff},
{0xff,0xd7,0x00}, {0xff,0xd7,0x5f}, {0xff,0xd7,0x87}, {0xff,0xd7,0xaf},
{0xff,0xd7,0xd7}, {0xff,0xd7,0xff}, {0xff,0xff,0x00}, {0xff,0xff,0x5f},
{0xff,0xff,0x87}, {0xff,0xff,0xaf}, {0xff,0xff,0xd7}, {0xff,0xff,0xff},
{0x08,0x08,0x08}, {0x12,0x12,0x12}, {0x1c,0x1c,0x1c}, {0x26,0x26,0x26},
{0x30,0x30,0x30}, {0x3a,0x3a,0x3a}, {0x44,0x44,0x44}, {0x4e,0x4e,0x4e},
{0x58,0x58,0x58}, {0x60,0x60,0x60}, {0x66,0x66,0x66}, {0x76,0x76,0x76},
{0x80,0x80,0x80}, {0x8a,0x8a,0x8a}, {0x94,0x94,0x94}, {0x9e,0x9e,0x9e},
{0xa8,0xa8,0xa8}, {0xb2,0xb2,0xb2}, {0xbc,0xbc,0xbc}, {0xc6,0xc6,0xc6},
{0xd0,0xd0,0xd0}, {0xda,0xda,0xda}, {0xe4,0xe4,0xe4}, {0xee,0xee,0xee},
};
int NCursesUI::get_color(Color color)
{
auto it = m_colors.find(color);
if (it != m_colors.end())
return it->second;
else if (can_change_color() and COLORS > 16)
{
kak_assert(color.color == Color::RGB);
if (m_next_color > COLORS)
m_next_color = 16;
init_color(m_next_color,
color.r * 1000 / 255,
color.g * 1000 / 255,
color.b * 1000 / 255);
m_colors[color] = m_next_color;
return m_next_color++;
}
else
{
kak_assert(color.color == Color::RGB);
int lowestDist = INT_MAX;
int closestCol = -1;
for (int i = 0; i < std::min(256, COLORS); ++i)
{
auto& col = builtin_colors[i];
int dist = sq(color.r - col.r)
+ sq(color.g - col.g)
+ sq(color.b - col.b);
if (dist < lowestDist)
{
lowestDist = dist;
closestCol = i;
}
}
return closestCol;
}
}
int NCursesUI::get_color_pair(const Face& face)
{
static int next_pair = 1;
ColorPair colors{face.fg, face.bg};
auto it = m_colorpairs.find(colors);
if (it != m_colorpairs.end())
return it->second;
else
{
init_pair(next_pair, get_color(face.fg), get_color(face.bg));
m_colorpairs[colors] = next_pair;
return next_pair++;
}
}
void NCursesUI::set_face(NCursesWin* window, Face face, const Face& default_face)
{
static int current_pair = -1;
if (current_pair != -1)
wattroff(window, COLOR_PAIR(current_pair));
if (face.fg == Color::Default)
face.fg = default_face.fg;
if (face.bg == Color::Default)
face.bg = default_face.bg;
if (face.fg != Color::Default or face.bg != Color::Default)
{
current_pair = get_color_pair(face);
wattron(window, COLOR_PAIR(current_pair));
}
set_attribute(window, A_UNDERLINE, face.attributes & Attribute::Underline);
set_attribute(window, A_REVERSE, face.attributes & Attribute::Reverse);
set_attribute(window, A_BLINK, face.attributes & Attribute::Blink);
set_attribute(window, A_BOLD, face.attributes & Attribute::Bold);
set_attribute(window, A_DIM, face.attributes & Attribute::Dim);
#if defined(A_ITALIC)
set_attribute(window, A_ITALIC, face.attributes & Attribute::Italic);
#endif
}
static sig_atomic_t resize_pending = 0;
void on_term_resize(int)
{
resize_pending = 1;
EventManager::instance().force_signal(0);
}
NCursesUI::NCursesUI()
: m_stdin_watcher{0, FdEvents::Read,
[this](FDWatcher&, FdEvents, EventMode mode) {
if (not m_on_key)
return;
while (auto key = get_next_key())
m_on_key(*key);
}},
m_assistant(assistant_clippy),
m_colors{
{ Color::Default, -1 },
{ Color::Black, COLOR_BLACK },
{ Color::Red, COLOR_RED },
{ Color::Green, COLOR_GREEN },
{ Color::Yellow, COLOR_YELLOW },
{ Color::Blue, COLOR_BLUE },
{ Color::Magenta, COLOR_MAGENTA },
{ Color::Cyan, COLOR_CYAN },
{ Color::White, COLOR_WHITE },
}
{
initscr();
raw();
noecho();
nonl();
curs_set(0);
start_color();
use_default_colors();
set_escdelay(25);
enable_mouse(true);
set_signal_handler(SIGWINCH, on_term_resize);
set_signal_handler(SIGCONT, on_term_resize);
check_resize(true);
redraw();
}
NCursesUI::~NCursesUI()
{
enable_mouse(false);
if (can_change_color()) // try to reset palette
{
fputs("\033]104;\007", stdout);
fflush(stdout);
}
endwin();
set_signal_handler(SIGWINCH, SIG_DFL);
set_signal_handler(SIGCONT, SIG_DFL);
}
void NCursesUI::Window::create(const DisplayCoord& p, const DisplayCoord& s)
{
pos = p;
size = s;
win = (NCursesWin*)newpad((int)size.line, (int)size.column);
}
void NCursesUI::Window::destroy()
{
delwin(win);
win = nullptr;
pos = DisplayCoord{};
size = DisplayCoord{};
}
void NCursesUI::Window::refresh()
{
if (not win)
return;
DisplayCoord max_pos = pos + size - DisplayCoord{1,1};
pnoutrefresh(win, 0, 0, (int)pos.line, (int)pos.column,
(int)max_pos.line, (int)max_pos.column);
}
void NCursesUI::redraw()
{
pnoutrefresh(m_window, 0, 0, 0, 0,
(int)m_dimensions.line + 1, (int)m_dimensions.column);
m_menu.refresh();
m_info.refresh();
doupdate();
}
void NCursesUI::refresh(bool force)
{
if (force)
redrawwin(m_window);
if (m_dirty or force)
redraw();
m_dirty = false;
}
void add_str(WINDOW* win, StringView str)
{
waddnstr(win, str.begin(), (int)str.length());
}
void NCursesUI::draw_line(NCursesWin* window, const DisplayLine& line,
ColumnCount col_index, ColumnCount max_column,
const Face& default_face)
{
for (const DisplayAtom& atom : line)
{
set_face(window, atom.face, default_face);
StringView content = atom.content();
if (content.empty())
continue;
const auto remaining_columns = max_column - col_index;
if (content.back() == '\n' and
content.column_length() - 1 < remaining_columns)
{
add_str(window, content.substr(0, content.length()-1));
waddch(window, ' ');
}
else
{
content = content.substr(0_col, remaining_columns);
add_str(window, content);
col_index += content.column_length();
}
}
}
static const DisplayLine empty_line = String(" ");
void NCursesUI::draw(const DisplayBuffer& display_buffer,
const Face& default_face,
const Face& padding_face)
{
wbkgdset(m_window, COLOR_PAIR(get_color_pair(default_face)));
check_resize();
LineCount line_index = m_status_on_top ? 1 : 0;
for (const DisplayLine& line : display_buffer.lines())
{
wmove(m_window, (int)line_index, 0);
wclrtoeol(m_window);
draw_line(m_window, line, 0, m_dimensions.column, default_face);
++line_index;
}
wbkgdset(m_window, COLOR_PAIR(get_color_pair(padding_face)));
set_face(m_window, padding_face, default_face);
while (line_index < m_dimensions.line + (m_status_on_top ? 1 : 0))
{
wmove(m_window, (int)line_index++, 0);
wclrtoeol(m_window);
waddch(m_window, '~');
}
m_dirty = true;
}
void NCursesUI::draw_status(const DisplayLine& status_line,
const DisplayLine& mode_line,
const Face& default_face)
{
const int status_line_pos = m_status_on_top ? 0 : (int)m_dimensions.line;
wmove(m_window, status_line_pos, 0);
wbkgdset(m_window, COLOR_PAIR(get_color_pair(default_face)));
wclrtoeol(m_window);
draw_line(m_window, status_line, 0, m_dimensions.column, default_face);
const auto mode_len = mode_line.length();
const auto remaining = m_dimensions.column - status_line.length();
if (mode_len < remaining)
{
ColumnCount col = m_dimensions.column - mode_len;
wmove(m_window, status_line_pos, (int)col);
draw_line(m_window, mode_line, col, m_dimensions.column, default_face);
}
else if (remaining > 2)
{
DisplayLine trimmed_mode_line = mode_line;
trimmed_mode_line.trim(mode_len + 2 - remaining, remaining - 2, false);
trimmed_mode_line.insert(trimmed_mode_line.begin(), { "…" });
kak_assert(trimmed_mode_line.length() == remaining - 1);
ColumnCount col = m_dimensions.column - remaining + 1;
wmove(m_window, status_line_pos, (int)col);
draw_line(m_window, trimmed_mode_line, col, m_dimensions.column, default_face);
}
if (m_set_title)
{
constexpr char suffix[] = " - Kakoune\007";
char buf[4 + 511 + 2] = "\033]2;";
// Fill title escape sequence buffer, removing non ascii characters
auto buf_it = &buf[4], buf_end = &buf[4 + 511 - (sizeof(suffix) - 2)];
for (auto& atom : mode_line)
{
const auto str = atom.content();
for (auto it = str.begin(), end = str.end();
it != end and buf_it != buf_end; utf8::to_next(it, end))
*buf_it++ = (*it >= 0x20 and *it <= 0x7e) ? *it : '?';
}
for (auto c : suffix)
*buf_it++ = c;
fputs(buf, stdout);
fflush(stdout);
}
m_dirty = true;
}
void NCursesUI::check_resize(bool force)
{
if (not force and not resize_pending)
return;
resize_pending = 0;
const int fd = open("/dev/tty", O_RDWR);
auto close_fd = on_scope_end([fd]{ close(fd); });
winsize ws;
if (ioctl(fd, TIOCGWINSZ, (void*)&ws) == 0)
{
const bool info = (bool)m_info;
const bool menu = (bool)m_menu;
if (m_window) delwin(m_window);
if (info) m_info.destroy();
if (menu) m_menu.destroy();
resize_term(ws.ws_row, ws.ws_col);
m_window = (NCursesWin*)newpad(ws.ws_row, ws.ws_col);
intrflush(m_window, false);
keypad(m_window, true);
m_dimensions = DisplayCoord{ws.ws_row-1, ws.ws_col};
if (char* csr = tigetstr((char*)"csr"))
putp(tparm(csr, 0, ws.ws_row));
if (menu)
{
auto items = std::move(m_menu.items);
menu_show(items, m_menu.anchor, m_menu.fg, m_menu.bg, m_menu.style);
}
if (info)
info_show(m_info.title, m_info.content, m_info.anchor, m_info.face, m_info.style);
}
else
kak_assert(false);
ungetch(KEY_RESIZE);
clearok(curscr, true);
werase(curscr);
}
void NCursesUI::on_sighup()
{
set_signal_handler(SIGWINCH, SIG_DFL);
set_signal_handler(SIGCONT, SIG_DFL);
m_window = nullptr;
}
Optional<Key> NCursesUI::get_next_key()
{
if (not m_window)
return {};
check_resize();
wtimeout(m_window, 0);
const int c = wgetch(m_window);
wtimeout(m_window, -1);
if (c == ERR)
return {};
if (c == KEY_MOUSE)
{
MEVENT ev;
if (getmouse(&ev) == OK)
{
auto get_modifiers = [this](mmask_t mask) {
Key::Modifiers res{};
if (mask & BUTTON_CTRL)
res |= Key::Modifiers::Control;
if (mask & BUTTON_ALT)
res |= Key::Modifiers::Alt;
if (BUTTON_PRESS(mask, 1))
return res | Key::Modifiers::MousePress;
if (BUTTON_RELEASE(mask, 1))
return res | Key::Modifiers::MouseRelease;
if (BUTTON_PRESS(mask, m_wheel_down_button))
return res | Key::Modifiers::MouseWheelDown;
if (BUTTON_PRESS(mask, m_wheel_up_button))
return res | Key::Modifiers::MouseWheelUp;
return res | Key::Modifiers::MousePos;
};
return Key{ get_modifiers(ev.bstate),
encode_coord({ ev.y - (m_status_on_top ? 1 : 0), ev.x }) };
}
}
if (c > 0 and c < 27)
{
if (c == control('m') or c == control('j'))
return {Key::Return};
if (c == control('i'))
return {Key::Tab};
if (c == control('z'))
{
raise(SIGTSTP);
return {};
}
return ctrl(Codepoint(c) - 1 + 'a');
}
else if (c == 27)
{
wtimeout(m_window, 0);
const Codepoint new_c = wgetch(m_window);
if (new_c == '[') // potential CSI
{
const Codepoint csi_val = wgetch(m_window);
switch (csi_val)
{
case 'I': return {Key::FocusIn};
case 'O': return {Key::FocusOut};
default: break; // nothing
}
}
wtimeout(m_window, -1);
if (new_c != ERR)
{
if (new_c > 0 and new_c < 27)
return ctrlalt(Codepoint(new_c) - 1 + 'a');
return alt(new_c);
}
else
return {Key::Escape};
}
else switch (c)
{
case KEY_BACKSPACE: case 127: return {Key::Backspace};
case KEY_DC: return {Key::Delete};
case KEY_UP: return {Key::Up};
case KEY_DOWN: return {Key::Down};
case KEY_LEFT: return {Key::Left};
case KEY_RIGHT: return {Key::Right};
case KEY_PPAGE: return {Key::PageUp};
case KEY_NPAGE: return {Key::PageDown};
case KEY_HOME: return {Key::Home};
case KEY_END: return {Key::End};
case KEY_BTAB: return {Key::BackTab};
case KEY_RESIZE: return resize(m_dimensions);
}
for (int i = 0; i < 12; ++i)
{
if (c == KEY_F(i+1))
return {Key::F1 + i};
}
if (c >= 0 and c < 256)
{
ungetch(c);
struct getch_iterator
{
getch_iterator(WINDOW* win) : window(win) {}
int operator*() { return wgetch(window); }
getch_iterator& operator++() { return *this; }
getch_iterator& operator++(int) { return *this; }
bool operator== (const getch_iterator&) const { return false; }
WINDOW* window;
};
return Key{utf8::codepoint(getch_iterator{m_window},
getch_iterator{m_window})};
}
return {};
}
template<typename T>
T div_round_up(T a, T b)
{
return (a - T(1)) / b + T(1);
}
void NCursesUI::draw_menu()
{
// menu show may have not created the window if it did not fit.
// so be tolerant.
if (not m_menu)
return;
const auto menu_bg = get_color_pair(m_menu.bg);
wattron(m_menu.win, COLOR_PAIR(menu_bg));
wbkgdset(m_menu.win, COLOR_PAIR(menu_bg));
const int item_count = (int)m_menu.items.size();
const LineCount menu_lines = div_round_up(item_count, m_menu.columns);
const LineCount& win_height = m_menu.size.line;
kak_assert(win_height <= menu_lines);
const ColumnCount column_width = (m_menu.size.column - 1) / m_menu.columns;
const LineCount mark_height = min(div_round_up(sq(win_height), menu_lines),
win_height);
const LineCount mark_line = (win_height - mark_height) * m_menu.top_line /
max(1_line, menu_lines - win_height);
for (auto line = 0_line; line < win_height; ++line)
{
wmove(m_menu.win, (int)line, 0);
for (int col = 0; col < m_menu.columns; ++col)
{
const int item_idx = (int)(m_menu.top_line + line) * m_menu.columns
+ col;
if (item_idx >= item_count)
break;
const DisplayLine& item = m_menu.items[item_idx];
draw_line(m_menu.win, item, 0, column_width,
item_idx == m_menu.selected_item ? m_menu.fg : m_menu.bg);
const ColumnCount pad = column_width - item.length();
add_str(m_menu.win, String{' ', pad});
}
const bool is_mark = line >= mark_line and
line < mark_line + mark_height;
wclrtoeol(m_menu.win);
wmove(m_menu.win, (int)line, (int)m_menu.size.column - 1);
wattron(m_menu.win, COLOR_PAIR(menu_bg));
add_str(m_menu.win, is_mark ? "█" : "░");
}
m_dirty = true;
}
void NCursesUI::menu_show(ConstArrayView<DisplayLine> items,
DisplayCoord anchor, Face fg, Face bg,
MenuStyle style)
{
menu_hide();
m_menu.fg = fg;
m_menu.bg = bg;
m_menu.style = style;
m_menu.anchor = anchor;
if (style == MenuStyle::Prompt)
anchor = DisplayCoord{m_status_on_top ? 0_line : m_dimensions.line, 0};
else if (m_status_on_top)
anchor.line += 1;
DisplayCoord maxsize = m_dimensions;
maxsize.column -= anchor.column;
if (maxsize.column <= 2)
return;
const int item_count = items.size();
m_menu.items.clear(); // make sure it is empty
m_menu.items.reserve(item_count);
ColumnCount longest = 1;
for (auto& item : items)
longest = max(longest, item.length());
const bool is_prompt = style == MenuStyle::Prompt;
m_menu.columns = is_prompt ? max((int)((maxsize.column-1) / (longest+1)), 1) : 1;
ColumnCount maxlen = maxsize.column-1;
if (m_menu.columns > 1 and item_count > 1)
maxlen = maxlen / m_menu.columns - 1;
for (auto& item : items)
{
m_menu.items.push_back(item);
m_menu.items.back().trim(0, maxlen, false);
kak_assert(m_menu.items.back().length() <= maxlen);
}
int height = min(10, div_round_up(item_count, m_menu.columns));
int line = (int)anchor.line + 1;
if (line + height >= (int)maxsize.line)
line = (int)anchor.line - height;
m_menu.selected_item = item_count;
m_menu.top_line = 0;
auto width = is_prompt ? maxsize.column : min(longest+1, maxsize.column);
m_menu.create({line, anchor.column}, {height, width});
draw_menu();
if (m_info)
info_show(m_info.title, m_info.content,
m_info.anchor, m_info.face, m_info.style);
}
void NCursesUI::menu_select(int selected)
{
const int item_count = m_menu.items.size();
const LineCount menu_lines = div_round_up(item_count, m_menu.columns);
if (selected < 0 or selected >= item_count)
{
m_menu.selected_item = -1;
m_menu.top_line = 0;
}
else
{
m_menu.selected_item = selected;
const LineCount selected_line = m_menu.selected_item / m_menu.columns;
const LineCount win_height = m_menu.size.line;
kak_assert(menu_lines >= win_height);
if (selected_line < m_menu.top_line)
m_menu.top_line = selected_line;
if (selected_line >= m_menu.top_line + win_height)
m_menu.top_line = min(selected_line, menu_lines - win_height);
}
draw_menu();
}
void NCursesUI::menu_hide()
{
if (not m_menu)
return;
m_menu.items.clear();
mark_dirty(m_menu);
m_menu.destroy();
m_dirty = true;
}
static DisplayCoord compute_needed_size(StringView str)
{
DisplayCoord res{1,0};
ColumnCount line_len = 0;
for (auto it = str.begin(), end = str.end();
it != end; it = utf8::next(it, end))
{
if (*it == '\n')
{
// ignore last '\n', no need to show an empty line
if (it+1 == end)
break;
res.column = max(res.column, line_len);
line_len = 0;
++res.line;
}
else
{
++line_len;
res.column = max(res.column, line_len);
}
}
return res;
}
static DisplayCoord compute_pos(DisplayCoord anchor, DisplayCoord size,
NCursesUI::Rect rect, NCursesUI::Rect to_avoid,
bool prefer_above)
{
DisplayCoord pos;
if (prefer_above)
{
pos = anchor - DisplayCoord{size.line};
if (pos.line < 0)
prefer_above = false;
}
auto rect_end = rect.pos + rect.size;
if (not prefer_above)
{
pos = anchor + DisplayCoord{1_line};
if (pos.line + size.line > rect_end.line)
pos.line = max(rect.pos.line, anchor.line - size.line);
}
if (pos.column + size.column > rect_end.column)
pos.column = max(rect.pos.column, rect_end.column - size.column);
if (to_avoid.size != DisplayCoord{})
{
DisplayCoord to_avoid_end = to_avoid.pos + to_avoid.size;
DisplayCoord end = pos + size;
// check intersection
if (not (end.line < to_avoid.pos.line or end.column < to_avoid.pos.column or
pos.line > to_avoid_end.line or pos.column > to_avoid_end.column))
{
pos.line = min(to_avoid.pos.line, anchor.line) - size.line;
// if above does not work, try below
if (pos.line < 0)
pos.line = max(to_avoid_end.line, anchor.line);
}
}
return pos;
}
String make_info_box(StringView title, StringView message, ColumnCount max_width,
ConstArrayView<StringView> assistant)
{
DisplayCoord assistant_size;
if (not assistant.empty())
assistant_size = { (int)assistant.size(), assistant[0].column_length() };
String result;
const ColumnCount max_bubble_width = max_width - assistant_size.column - 6;
if (max_bubble_width < 4)
return result;
Vector<StringView> lines = wrap_lines(message, max_bubble_width);
ColumnCount bubble_width = title.column_length() + 2;
for (auto& line : lines)
bubble_width = max(bubble_width, line.column_length());
auto line_count = max(assistant_size.line-1,
LineCount{(int)lines.size()} + 2);
for (LineCount i = 0; i < line_count; ++i)
{
constexpr Codepoint dash{L'─'};
if (not assistant.empty())
result += assistant[min((int)i, (int)assistant_size.line-1)];
if (i == 0)
{
if (title.empty())
result += "╭─" + String{dash, bubble_width} + "─╮";
else
{
auto dash_count = bubble_width - title.column_length() - 2;
String left{dash, dash_count / 2};
String right{dash, dash_count - dash_count / 2};
result += "╭─" + left + "┤" + title +"├" + right +"─╮";
}
}
else if (i < lines.size() + 1)
{
auto& line = lines[(int)i - 1];
const ColumnCount padding = bubble_width - line.column_length();
result += "│ " + line + String{' ', padding} + " │";
}
else if (i == lines.size() + 1)
result += "╰─" + String(dash, bubble_width) + "─╯";
result += "\n";
}
return result;
}
void NCursesUI::info_show(StringView title, StringView content,
DisplayCoord anchor, Face face, InfoStyle style)
{
info_hide();
m_info.title = title.str();
m_info.content = content.str();
m_info.anchor = anchor;
m_info.face = face;
m_info.style = style;
String info_box;
if (style == InfoStyle::Prompt)
{
info_box = make_info_box(m_info.title, m_info.content,
m_dimensions.column, m_assistant);
anchor = DisplayCoord{m_status_on_top ? 0 : m_dimensions.line,
m_dimensions.column-1};
}
else
{
if (m_status_on_top)
anchor.line += 1;
ColumnCount col = anchor.column;
if (style == InfoStyle::MenuDoc and m_menu)
col = m_menu.pos.column + m_menu.size.column;
const ColumnCount max_width = m_dimensions.column - col;
if (max_width < 4)
return;
for (auto& line : wrap_lines(m_info.content, max_width))
info_box += line + "\n";
}
DisplayCoord size = compute_needed_size(info_box), pos;
const Rect rect = {m_status_on_top ? 1_line : 0_line, m_dimensions};
if (style == InfoStyle::MenuDoc and m_menu)
pos = m_menu.pos + DisplayCoord{0_line, m_menu.size.column};
else
pos = compute_pos(anchor, size, rect, m_menu, style == InfoStyle::InlineAbove);
// The info box does not fit
if (pos < rect.pos or pos + size > rect.pos + rect.size)
return;
m_info.create(pos, size);
wbkgd(m_info.win, COLOR_PAIR(get_color_pair(face)));
int line = 0;
auto it = info_box.begin(), end = info_box.end();
while (true)
{
wmove(m_info.win, line++, 0);
auto eol = std::find_if(it, end, [](char c) { return c == '\n'; });
add_str(m_info.win, {it, eol});
if (eol == end)
break;
it = eol + 1;
}
m_dirty = true;
}
void NCursesUI::info_hide()
{
if (not m_info)
return;
mark_dirty(m_info);
m_info.destroy();
m_dirty = true;
}
void NCursesUI::mark_dirty(const Window& win)
{
wredrawln(m_window, (int)win.pos.line, (int)win.size.line);
}
void NCursesUI::set_on_key(OnKeyCallback callback)
{
m_on_key = std::move(callback);
}
DisplayCoord NCursesUI::dimensions()
{
return m_dimensions;
}
void NCursesUI::abort()
{
endwin();
}
void NCursesUI::enable_mouse(bool enabled)
{
if (enabled == m_mouse_enabled)
return;
m_mouse_enabled = enabled;
if (enabled)
{
mousemask(ALL_MOUSE_EVENTS | REPORT_MOUSE_POSITION, nullptr);
mouseinterval(0);
// force enable report mouse position
fputs("\033[?1002h", stdout);
// force enable report focus events
fputs("\033[?1004h", stdout);
}
else
{
mousemask(0, nullptr);
fputs("\033[?1004l", stdout);
fputs("\033[?1002l", stdout);
}
fflush(stdout);
}
void NCursesUI::set_ui_options(const Options& options)
{
{
auto it = options.find("ncurses_assistant");
if (it == options.end() or it->value == "clippy")
m_assistant = assistant_clippy;
else if (it->value == "cat")
m_assistant = assistant_cat;
else if (it->value == "none" or it->value == "off")
m_assistant = ConstArrayView<StringView>{};
}
{
auto it = options.find("ncurses_status_on_top");
m_status_on_top = it != options.end() and
(it->value == "yes" or it->value == "true");
}
{
auto it = options.find("ncurses_set_title");
m_set_title = it == options.end() or
(it->value == "yes" or it->value == "true");
}
{
auto enable_mouse_it = options.find("ncurses_enable_mouse");
enable_mouse(enable_mouse_it == options.end() or
enable_mouse_it->value == "yes" or
enable_mouse_it->value == "true");
auto wheel_up_it = options.find("ncurses_wheel_up_button");
m_wheel_up_button = wheel_up_it != options.end() ?
str_to_int_ifp(wheel_up_it->value).value_or(4) : 4;
auto wheel_down_it = options.find("ncurses_wheel_down_button");
m_wheel_down_button = wheel_down_it != options.end() ?
str_to_int_ifp(wheel_down_it->value).value_or(5) : 5;
}
}
}