kakoune/src/ncurses.cc

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#include "ncurses.hh"
#include "window.hh"
#include "register_manager.hh"
#include <map>
#define CTRL(x) x - 'a' + 1
namespace Kakoune
{
static void set_attribute(int attribute, bool on)
{
if (on)
attron(attribute);
else
attroff(attribute);
}
static 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:
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return -1;
}
}
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static int get_color_pair(Color fg_color, Color bg_color)
{
static std::map<std::pair<Color, Color>, int> colorpairs;
static int next_pair = 1;
std::pair<Color, Color> colorpair(fg_color, bg_color);
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auto it = colorpairs.find(colorpair);
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if (it != colorpairs.end())
return it->second;
else
{
init_pair(next_pair, nc_color(fg_color), nc_color(bg_color));
colorpairs[colorpair] = next_pair;
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return next_pair++;
}
}
static void set_color(Color fg_color, Color bg_color)
{
static int current_pair = -1;
if (current_pair != -1)
attroff(COLOR_PAIR(current_pair));
if (fg_color != Color::Default or bg_color != Color::Default)
{
current_pair = get_color_pair(fg_color, bg_color);
attron(COLOR_PAIR(current_pair));
}
}
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NCursesClient::NCursesClient()
: m_menu(nullptr)
{
// setlocale(LC_ALL, "");
initscr();
cbreak();
noecho();
nonl();
intrflush(stdscr, false);
keypad(stdscr, true);
curs_set(0);
start_color();
use_default_colors();
ESCDELAY=25;
m_menu_fg = get_color_pair(Color::Blue, Color::Cyan);
m_menu_bg = get_color_pair(Color::Cyan, Color::Blue);
}
NCursesClient::~NCursesClient()
{
endwin();
}
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void NCursesClient::draw_window(Window& window)
{
int max_x,max_y;
getmaxyx(stdscr, max_y, max_x);
max_y -= 1;
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int status_y = max_y;
if (m_menu)
{
int rows;
int cols;
menu_format(m_menu, &rows, &cols);
max_y -= rows;
}
window.set_dimensions(DisplayCoord(LineCount(max_y), max_x));
window.update_display_buffer();
int line_index = 0;
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int last_line = INT_MAX;
for (const DisplayLine& line : window.display_buffer().lines())
{
move(line_index, 0);
clrtoeol();
for (const DisplayAtom& atom : line)
{
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);
String content = atom.content.content();
if (content[content.length()-1] == '\n')
{
addnstr(content.c_str(), (int)content.length() - 1);
addch(' ');
}
else
addstr(content.c_str());
}
++line_index;
}
set_attribute(A_UNDERLINE, 0);
set_attribute(A_REVERSE, 0);
set_attribute(A_BLINK, 0);
set_attribute(A_BOLD, 0);
set_color(Color::Blue, Color::Black);
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for (;line_index < max_y; ++line_index)
{
move(line_index, 0);
clrtoeol();
addch('~');
}
set_color(Color::Cyan, Color::Black);
String status_line = window.status_line();
static int last_status_length = 0;
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move(status_y, max_x - last_status_length);
clrtoeol();
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move(status_y, max_x - (int)status_line.length());
addstr(status_line.c_str());
last_status_length = (int)status_line.length();
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refresh();
}
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Key NCursesClient::get_key()
{
const int c = getch();
if (c > 0 and c < 27)
{
return {Key::Modifiers::Control, c - 1 + 'a'};
}
else if (c == 27)
{
timeout(0);
const int new_c = getch();
timeout(-1);
if (new_c != ERR)
return {Key::Modifiers::Alt, new_c};
else
return Key::Escape;
}
else switch (c)
{
case KEY_BACKSPACE: return Key::Backspace;
case KEY_UP: return Key::Up;
case KEY_DOWN: return Key::Down;
case KEY_LEFT: return Key::Left;
case KEY_RIGHT: return Key::Right;
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case KEY_PPAGE: return Key::PageUp;
case KEY_NPAGE: return Key::PageDown;
}
return c;
}
void NCursesClient::print_status(const String& status, CharCount cursor_pos)
{
int x,y;
getmaxyx(stdscr, y, x);
move(y-1, 0);
clrtoeol();
if (cursor_pos == -1)
addstr(status.c_str());
else if (cursor_pos < status.length())
{
addstr(status.substr(0, cursor_pos).c_str());
set_attribute(A_REVERSE, 1);
addch(status[cursor_pos]);
set_attribute(A_REVERSE, 0);
addstr(status.substr(cursor_pos+1, -1).c_str());
}
else
{
addstr(status.c_str());
set_attribute(A_REVERSE, 1);
addch(' ');
set_attribute(A_REVERSE, 0);
}
refresh();
}
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void NCursesClient::menu_show(const memoryview<String>& choices)
{
assert(m_menu == nullptr);
m_choices = std::vector<String>(choices.begin(), choices.end());
for (int i = 0; i < m_choices.size(); ++i)
m_counts.push_back(int_to_str(i+1));
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CharCount longest = 0;
for (int i = 0; i < m_choices.size(); ++i)
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{
m_items.push_back(new_item(m_counts[i].c_str(), m_choices[i].c_str()));
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longest = std::max(longest, m_choices[i].length());
}
m_items.push_back(nullptr);
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longest += m_counts.back().length() + 2;
int max_x,max_y;
getmaxyx(stdscr, max_y, max_x);
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int columns = max_x / std::min(max_x, (int)longest);
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int lines = std::min(10, (int)ceilf((float)m_choices.size()/columns));
m_menu = new_menu(&m_items[0]);
int pos_y = max_y - lines - 1;
set_menu_sub(m_menu, derwin(stdscr, max_y - pos_y - 1, max_x, pos_y, 0));
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set_menu_format(m_menu, lines, columns);
set_menu_mark(m_menu, nullptr);
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set_menu_fore(m_menu, COLOR_PAIR(m_menu_fg));
set_menu_back(m_menu, COLOR_PAIR(m_menu_bg));
post_menu(m_menu);
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refresh();
}
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void NCursesClient::menu_select(int selected)
{
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if (0 <= selected and selected < m_items.size())
{
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set_menu_fore(m_menu, COLOR_PAIR(m_menu_fg));
set_current_item(m_menu, m_items[selected]);
}
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else
set_menu_fore(m_menu, COLOR_PAIR(m_menu_bg));
refresh();
}
void NCursesClient::menu_hide()
{
if (not m_menu)
return;
unpost_menu(m_menu);
free_menu(m_menu);
for (auto item : m_items)
if (item)
free_item(item);
m_menu = nullptr;
m_items.clear();
m_counts.clear();
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refresh();
}
}