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Copy pathwindow.cpp
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1389 lines (1282 loc) · 28.7 KB
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/***************************************************************************
* Copyright (C) 2008-2014 by Andrzej Rybczak *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. *
***************************************************************************/
#include <algorithm>
#include <cstring>
#include <cstdio>
#include <cstdlib>
#include <iostream>
#include <readline/history.h>
#include <readline/readline.h>
#include <sys/select.h>
#include <unistd.h>
#include "utility/string.h"
#include "utility/wide_string.h"
#include "window.h"
namespace {
struct ScopedWindowTimeout
{
ScopedWindowTimeout(WINDOW *w, int init_timeout, int term_timeout)
: m_w(w), m_term_timeout(term_timeout) {
wtimeout(w, init_timeout);
}
~ScopedWindowTimeout() {
wtimeout(m_w, m_term_timeout);
}
private:
WINDOW *m_w;
int m_term_timeout;
};
namespace rl {
bool aborted;
NC::Window *w;
size_t start_x;
size_t start_y;
size_t width;
bool encrypted;
const char *base;
int read_key(FILE *)
{
size_t x;
bool done;
int result;
do
{
x = w->getX();
if (w->runPromptHook(rl_line_buffer, &done))
{
if (done)
{
rl_done = 1;
return EOF;
}
w->goToXY(x, start_y);
}
w->refresh();
result = w->readKey();
if (!w->FDCallbacksListEmpty())
{
w->goToXY(x, start_y);
w->refresh();
}
}
while (result == ERR);
return result;
}
void display_string()
{
auto print_char = [](wchar_t wc) {
if (encrypted)
*w << '*';
else
*w << wc;
};
auto print_string = [](wchar_t *ws, size_t len) {
if (encrypted)
for (size_t i = 0; i < len; ++i)
*w << '*';
else
*w << ws;
};
auto narrow_to_wide = [](wchar_t *dest, const char *src, size_t n) {
size_t result = 0;
// convert the string and substitute invalid multibyte chars with dots.
for (size_t i = 0; i < n;)
{
int ret = mbtowc(&dest[result], &src[i], n-i);
if (ret > 0)
{
i += ret;
++result;
}
else if (ret == -1)
{
dest[result] = L'.';
++i;
++result;
}
else
throw std::runtime_error("mbtowc: unexpected return value");
}
return result;
};
// copy the part of the string that is before the cursor to pre_pos
char pt = rl_line_buffer[rl_point];
rl_line_buffer[rl_point] = 0;
wchar_t pre_pos[rl_point+1];
pre_pos[narrow_to_wide(pre_pos, rl_line_buffer, rl_point)] = 0;
rl_line_buffer[rl_point] = pt;
int pos = wcswidth(pre_pos, rl_point);
if (pos < 0)
pos = rl_point;
// clear the area for the string
mvwhline(w->raw(), start_y, start_x, ' ', width+1);
w->goToXY(start_x, start_y);
if (size_t(pos) <= width)
{
// if the current position in the string is not bigger than allowed
// width, print the part of the string before cursor position...
print_string(pre_pos, pos);
// ...and then print the rest char-by-char until there is no more area
wchar_t post_pos[rl_end-rl_point+1];
post_pos[narrow_to_wide(post_pos, rl_line_buffer+rl_point, rl_end-rl_point)] = 0;
size_t cpos = pos;
for (wchar_t *c = post_pos; *c != 0; ++c)
{
int n = wcwidth(*c);
if (n < 0)
{
print_char(L'.');
++cpos;
}
else
{
if (cpos+n > width)
break;
cpos += n;
print_char(*c);
}
}
}
else
{
// if the current position in the string is bigger than allowed
// width, we always keep the cursor at the end of the line (it
// would be nice to have more flexible scrolling, but for now
// let's stick to that) by cutting the beginning of the part
// of the string before the cursor until it fits the area.
wchar_t *mod_pre_pos = pre_pos;
while (*mod_pre_pos != 0)
{
++mod_pre_pos;
int n = wcwidth(*mod_pre_pos);
if (n < 0)
--pos;
else
pos -= n;
if (size_t(pos) <= width)
break;
}
print_string(mod_pre_pos, pos);
}
w->goToXY(start_x+pos, start_y);
}
int add_base()
{
rl_insert_text(base);
return 0;
}
}
}
namespace NC {
const short Color::transparent = -1;
const short Color::previous = -2;
Color Color::Default(0, 0, true, false);
Color Color::Black(COLOR_BLACK, Color::transparent);
Color Color::Red(COLOR_RED, Color::transparent);
Color Color::Green(COLOR_GREEN, Color::transparent);
Color Color::Yellow(COLOR_YELLOW, Color::transparent);
Color Color::Blue(COLOR_BLUE, Color::transparent);
Color Color::Magenta(COLOR_MAGENTA, Color::transparent);
Color Color::Cyan(COLOR_CYAN, Color::transparent);
Color Color::White(COLOR_WHITE, Color::transparent);
Color Color::End(0, 0, false, true);
int Color::pairNumber() const
{
int result;
if (isDefault())
result = 0;
else if (previousBackground())
throw std::logic_error("color depends on the previous background value");
else if (isEnd())
throw std::logic_error("'end' doesn't have a corresponding pair number");
else
{
// colors start with 0, but pairs start with 1. additionally
// first pairs are for transparent background, which has a
// value of -1, so we need to add 1 to both foreground and
// background value.
result = background() + 1;
result *= COLORS;
result += foreground() + 1;
}
return result;
}
std::istream &operator>>(std::istream &is, Color &c)
{
auto get_single_color = [](const std::string &s, bool background) {
short result = -1;
if (s == "black")
result = COLOR_BLACK;
else if (s == "red")
result = COLOR_RED;
else if (s == "green")
result = COLOR_GREEN;
else if (s == "yellow")
result = COLOR_YELLOW;
else if (s == "blue")
result = COLOR_BLUE;
else if (s == "magenta")
result = COLOR_MAGENTA;
else if (s == "cyan")
result = COLOR_CYAN;
else if (s == "white")
result = COLOR_WHITE;
else if (background && s == "previous")
result = NC::Color::previous;
else if (std::all_of(s.begin(), s.end(), isdigit))
{
result = atoi(s.c_str());
if (result < 1 || result > 256)
result = -1;
else
--result;
}
return result;
};
std::string sc;
is >> sc;
if (sc == "default")
c = Color::Default;
else if (sc == "end")
c = Color::End;
else
{
short value = get_single_color(sc, false);
if (value != -1)
c = Color(value, NC::Color::transparent);
else
{
size_t underscore = sc.find('_');
if (underscore != std::string::npos)
{
short fg = get_single_color(sc.substr(0, underscore), false);
short bg = get_single_color(sc.substr(underscore+1), true);
if (fg != -1 && bg != -1)
c = Color(fg, bg);
else
is.setstate(std::ios::failbit);
}
else
is.setstate(std::ios::failbit);
}
}
return is;
}
namespace Mouse {
namespace {
bool mouseEnabled = false;
}
void enable()
{
if (mouseEnabled)
return;
// save old highlight mouse tracking
std::printf("\e[?1001s");
// enable mouse tracking
std::printf("\e[?1000h");
// try to enable extended (urxvt) mouse tracking
std::printf("\e[?1015h");
mouseEnabled = true;
}
void disable()
{
if (!mouseEnabled)
return;
// disable extended (urxvt) mouse tracking
std::printf("\e[?1015l");
// disable mouse tracking
std::printf("\e[?1000l");
// restore old highlight mouse tracking
std::printf("\e[?1001r");
mouseEnabled = false;
}
}
void initScreen(bool enable_colors, bool enable_mouse)
{
initscr();
if (has_colors() && enable_colors)
{
start_color();
use_default_colors();
int npair = 1;
for (int bg = -1; bg < COLORS; ++bg)
{
for (int fg = 0; npair < COLOR_PAIRS && fg < COLORS; ++fg, ++npair)
init_pair(npair, fg, bg);
}
}
raw();
nonl();
noecho();
curs_set(0);
// setup mouse
if (enable_mouse)
Mouse::enable();
// initialize readline (needed, otherwise we get segmentation
// fault on SIGWINCH). also, initialize first as doing this
// later erases keys bound with rl_bind_key for some users.
rl_initialize();
// disable autocompletion
rl_attempted_completion_function = [](const char *, int, int) -> char ** {
rl_attempted_completion_over = 1;
return nullptr;
};
auto abort_prompt = [](int, int) -> int {
rl::aborted = true;
rl_done = 1;
return 0;
};
// if ctrl-c or ctrl-g is pressed, abort the prompt
rl_bind_key('\3', abort_prompt);
rl_bind_key('\7', abort_prompt);
// do not change the state of the terminal
rl_prep_term_function = nullptr;
rl_deprep_term_function = nullptr;
// do not catch signals
rl_catch_signals = 0;
// overwrite readline callbacks
rl_getc_function = rl::read_key;
rl_redisplay_function = rl::display_string;
rl_startup_hook = rl::add_base;
}
void destroyScreen()
{
Mouse::disable();
curs_set(1);
endwin();
}
Window::Window(size_t startx,
size_t starty,
size_t width,
size_t height,
std::string title,
Color color,
Border border)
: m_window(nullptr),
m_start_x(startx),
m_start_y(starty),
m_width(width),
m_height(height),
m_window_timeout(-1),
m_color(color),
m_base_color(color),
m_border(std::move(border)),
m_prompt_hook(0),
m_title(std::move(title)),
m_escape_terminal_sequences(true),
m_bold_counter(0),
m_underline_counter(0),
m_reverse_counter(0),
m_alt_charset_counter(0)
{
if (m_start_x > size_t(COLS)
|| m_start_y > size_t(LINES)
|| m_width+m_start_x > size_t(COLS)
|| m_height+m_start_y > size_t(LINES))
throw std::logic_error("constructed window doesn't fit into the terminal");
if (m_border)
{
++m_start_x;
++m_start_y;
m_width -= 2;
m_height -= 2;
}
if (!m_title.empty())
{
m_start_y += 2;
m_height -= 2;
}
m_window = newpad(m_height, m_width);
setColor(m_color);
}
Window::Window(const Window &rhs)
: m_window(dupwin(rhs.m_window))
, m_start_x(rhs.m_start_x)
, m_start_y(rhs.m_start_y)
, m_width(rhs.m_width)
, m_height(rhs.m_height)
, m_window_timeout(rhs.m_window_timeout)
, m_color(rhs.m_color)
, m_base_color(rhs.m_base_color)
, m_border(rhs.m_border)
, m_prompt_hook(rhs.m_prompt_hook)
, m_title(rhs.m_title)
, m_color_stack(rhs.m_color_stack)
, m_input_queue(rhs.m_input_queue)
, m_fds(rhs.m_fds)
, m_escape_terminal_sequences(rhs.m_escape_terminal_sequences)
, m_bold_counter(rhs.m_bold_counter)
, m_underline_counter(rhs.m_underline_counter)
, m_reverse_counter(rhs.m_reverse_counter)
, m_alt_charset_counter(rhs.m_alt_charset_counter)
{
}
Window::Window(Window &&rhs)
: m_window(rhs.m_window)
, m_start_x(rhs.m_start_x)
, m_start_y(rhs.m_start_y)
, m_width(rhs.m_width)
, m_height(rhs.m_height)
, m_window_timeout(rhs.m_window_timeout)
, m_color(rhs.m_color)
, m_base_color(rhs.m_base_color)
, m_border(rhs.m_border)
, m_prompt_hook(rhs.m_prompt_hook)
, m_title(std::move(rhs.m_title))
, m_color_stack(std::move(rhs.m_color_stack))
, m_input_queue(std::move(rhs.m_input_queue))
, m_fds(std::move(rhs.m_fds))
, m_escape_terminal_sequences(rhs.m_escape_terminal_sequences)
, m_bold_counter(rhs.m_bold_counter)
, m_underline_counter(rhs.m_underline_counter)
, m_reverse_counter(rhs.m_reverse_counter)
, m_alt_charset_counter(rhs.m_alt_charset_counter)
{
rhs.m_window = nullptr;
}
Window &Window::operator=(Window rhs)
{
std::swap(m_window, rhs.m_window);
std::swap(m_start_x, rhs.m_start_x);
std::swap(m_start_y, rhs.m_start_y);
std::swap(m_width, rhs.m_width);
std::swap(m_height, rhs.m_height);
std::swap(m_window_timeout, rhs.m_window_timeout);
std::swap(m_color, rhs.m_color);
std::swap(m_base_color, rhs.m_base_color);
std::swap(m_border, rhs.m_border);
std::swap(m_prompt_hook, rhs.m_prompt_hook);
std::swap(m_title, rhs.m_title);
std::swap(m_color_stack, rhs.m_color_stack);
std::swap(m_input_queue, rhs.m_input_queue);
std::swap(m_fds, rhs.m_fds);
std::swap(m_escape_terminal_sequences, rhs.m_escape_terminal_sequences);
std::swap(m_bold_counter, rhs.m_bold_counter);
std::swap(m_underline_counter, rhs.m_underline_counter);
std::swap(m_reverse_counter, rhs.m_reverse_counter);
std::swap(m_alt_charset_counter, rhs.m_alt_charset_counter);
return *this;
}
Window::~Window()
{
delwin(m_window);
}
void Window::setColor(Color c)
{
if (c.isDefault())
c = m_base_color;
if (c != Color::Default)
{
if (c.previousBackground())
c = Color(c.foreground(), m_color.background());
wcolor_set(m_window, c.pairNumber(), nullptr);
}
else
wcolor_set(m_window, m_base_color.pairNumber(), nullptr);
m_color = std::move(c);
}
void Window::setBaseColor(Color c)
{
m_base_color = std::move(c);
}
void Window::setBorder(Border border)
{
if (!border && m_border)
{
--m_start_x;
--m_start_y;
m_height += 2;
m_width += 2;
recreate(m_width, m_height);
}
else if (border && !m_border)
{
++m_start_x;
++m_start_y;
m_height -= 2;
m_width -= 2;
recreate(m_width, m_height);
}
m_border = border;
}
void Window::setTitle(const std::string &new_title)
{
if (!new_title.empty() && m_title.empty())
{
m_start_y += 2;
m_height -= 2;
recreate(m_width, m_height);
}
else if (new_title.empty() && !m_title.empty())
{
m_start_y -= 2;
m_height += 2;
recreate(m_width, m_height);
}
m_title = new_title;
}
void Window::recreate(size_t width, size_t height)
{
delwin(m_window);
m_window = newpad(height, width);
setTimeout(m_window_timeout);
setColor(m_color);
}
void Window::moveTo(size_t new_x, size_t new_y)
{
m_start_x = new_x;
m_start_y = new_y;
if (m_border)
{
++m_start_x;
++m_start_y;
}
if (!m_title.empty())
m_start_y += 2;
}
void Window::adjustDimensions(size_t width, size_t height)
{
if (m_border)
{
width -= 2;
height -= 2;
}
if (!m_title.empty())
height -= 2;
m_height = height;
m_width = width;
}
void Window::resize(size_t new_width, size_t new_height)
{
adjustDimensions(new_width, new_height);
recreate(m_width, m_height);
}
void Window::refreshBorder() const
{
if (m_border)
{
size_t start_x = getStartX(), start_y = getStarty();
size_t width = getWidth(), height = getHeight();
color_set(m_border->pairNumber(), nullptr);
attron(A_ALTCHARSET);
// corners
mvaddch(start_y, start_x, 'l');
mvaddch(start_y, start_x+width-1, 'k');
mvaddch(start_y+height-1, start_x, 'm');
mvaddch(start_y+height-1, start_x+width-1, 'j');
// lines
mvhline(start_y, start_x+1, 'q', width-2);
mvhline(start_y+height-1, start_x+1, 'q', width-2);
mvvline(start_y+1, start_x, 'x', height-2);
mvvline(start_y+1, start_x+width-1, 'x', height-2);
if (!m_title.empty())
{
mvaddch(start_y+2, start_x, 't');
mvaddch(start_y+2, start_x+width-1, 'u');
}
attroff(A_ALTCHARSET);
}
else
color_set(m_base_color.pairNumber(), nullptr);
if (!m_title.empty())
{
// clear title line
mvhline(m_start_y-2, m_start_x, ' ', m_width);
attron(A_BOLD);
mvaddstr(m_start_y-2, m_start_x, m_title.c_str());
attroff(A_BOLD);
// add separator
mvhline(m_start_y-1, m_start_x, 0, m_width);
}
standend();
::refresh();
}
void Window::display()
{
refreshBorder();
refresh();
}
void Window::refresh()
{
prefresh(m_window, 0, 0, m_start_y, m_start_x, m_start_y+m_height-1, m_start_x+m_width-1);
}
void Window::clear()
{
werase(m_window);
}
void Window::bold(bool bold_state) const
{
(bold_state ? wattron : wattroff)(m_window, A_BOLD);
}
void Window::underline(bool underline_state) const
{
(underline_state ? wattron : wattroff)(m_window, A_UNDERLINE);
}
void Window::reverse(bool reverse_state) const
{
(reverse_state ? wattron : wattroff)(m_window, A_REVERSE);
}
void Window::altCharset(bool altcharset_state) const
{
(altcharset_state ? wattron : wattroff)(m_window, A_ALTCHARSET);
}
void Window::setTimeout(int timeout)
{
if (timeout != m_window_timeout)
{
m_window_timeout = timeout;
wtimeout(m_window, timeout);
}
}
void Window::addFDCallback(int fd, void (*callback)())
{
m_fds.push_back(std::make_pair(fd, callback));
}
void Window::clearFDCallbacksList()
{
m_fds.clear();
}
bool Window::FDCallbacksListEmpty() const
{
return m_fds.empty();
}
Key::Type Window::getInputChar(int key)
{
if (!m_escape_terminal_sequences || key != Key::Escape)
return key;
auto define_mouse_event = [this](int type) {
switch (type & ~28)
{
case 32:
m_mouse_event.bstate = BUTTON1_PRESSED;
break;
case 33:
m_mouse_event.bstate = BUTTON2_PRESSED;
break;
case 34:
m_mouse_event.bstate = BUTTON3_PRESSED;
break;
case 96:
m_mouse_event.bstate = BUTTON4_PRESSED;
break;
case 97:
m_mouse_event.bstate = BUTTON5_PRESSED;
break;
default:
return Key::None;
}
if (type & 4)
m_mouse_event.bstate |= BUTTON_SHIFT;
if (type & 8)
m_mouse_event.bstate |= BUTTON_ALT;
if (type & 16)
m_mouse_event.bstate |= BUTTON_CTRL;
if (m_mouse_event.x < 0 || m_mouse_event.x >= COLS)
return Key::None;
if (m_mouse_event.y < 0 || m_mouse_event.y >= LINES)
return Key::None;
return Key::Mouse;
};
auto get_xterm_modifier_key = [](int ch) {
Key::Type modifier;
switch (ch)
{
case '2':
modifier = Key::Shift;
break;
case '3':
modifier = Key::Alt;
break;
case '4':
modifier = Key::Alt | Key::Shift;
break;
case '5':
modifier = Key::Ctrl;
break;
case '6':
modifier = Key::Ctrl | Key::Shift;
break;
case '7':
modifier = Key::Alt | Key::Ctrl;
break;
case '8':
modifier = Key::Alt | Key::Ctrl | Key::Shift;
break;
default:
modifier = Key::None;
}
return modifier;
};
auto parse_number = [this](int &result) {
int x;
while (true)
{
x = wgetch(m_window);
if (!isdigit(x))
return x;
result = result*10 + x - '0';
}
};
ScopedWindowTimeout swt(m_window, 0, m_window_timeout);
key = wgetch(m_window);
switch (key)
{
case '\t': // tty
return Key::Shift | Key::Tab;
case 'O': // ctrl+arrows in rxvt, F1 to F4 in xterm
key = wgetch(m_window);
switch (key)
{
case 'a':
return Key::Ctrl | Key::Up;
case 'b':
return Key::Ctrl | Key::Down;
case 'c':
return Key::Ctrl | Key::Right;
case 'd':
return Key::Ctrl | Key::Left;
case 'P':
return Key::F1;
case 'Q':
return Key::F2;
case 'R':
return Key::F3;
case 'S':
return Key::F4;
default:
return Key::None;
}
case '[':
key = wgetch(m_window);
switch (key)
{
case 'a':
return Key::Shift | Key::Up;
case 'b':
return Key::Shift | Key::Down;
case 'c':
return Key::Shift | Key::Right;
case 'd':
return Key::Shift | Key::Left;
case 'A':
return Key::Up;
case 'B':
return Key::Down;
case 'C':
return Key::Right;
case 'D':
return Key::Left;
case 'F': // xterm
return Key::End;
case 'H': // xterm
return Key::Home;
case 'M': // standard mouse event
{
key = wgetch(m_window);
int raw_x = wgetch(m_window);
int raw_y = wgetch(m_window);
// support coordinates up to 255
m_mouse_event.x = (raw_x - 33) & 0xff;
m_mouse_event.y = (raw_y - 33) & 0xff;
return define_mouse_event(key);
}
case 'Z':
return Key::Shift | Key::Tab;
case '[': // F1 to F5 in tty
key = wgetch(m_window);
switch (key)
{
case 'A':
return Key::F1;
case 'B':
return Key::F2;
case 'C':
return Key::F3;
case 'D':
return Key::F4;
case 'E':
return Key::F5;
default:
return Key::None;
}
case '1': case '2': case '3':
case '4': case '5': case '6':
case '7': case '8': case '9':
{
key -= '0';
int delim = parse_number(key);
if (key >= 2 && key <= 8)
{
Key::Type modifier;
switch (delim)
{
case '~':
modifier = Key::Null;
break;
case '^':
modifier = Key::Ctrl;
break;
case '$':
modifier = Key::Shift;
break;
case '@':
modifier = Key::Ctrl | Key::Shift;
break;
case ';': // xterm insert/delete/page up/page down
{
int local_key = wgetch(m_window);
modifier = get_xterm_modifier_key(local_key);
local_key = wgetch(m_window);
if (local_key != '~' || (key != 2 && key != 3 && key != 5 && key != 6))
return Key::None;
break;
}
default:
return Key::None;
}
switch (key)
{
case 2:
return modifier | Key::Insert;
case 3:
return modifier | Key::Delete;
case 4:
return modifier | Key::End;
case 5:
return modifier | Key::PageUp;
case 6:
return modifier | Key::PageDown;
case 7:
return modifier | Key::Home;
case 8:
return modifier | Key::End;
default:
std::cerr << "Unreachable code, aborting.\n";
std::terminate();
}
}
switch (delim)
{
case '~':
{
switch (key)
{
case 1: // tty
return Key::Home;
case 11:
return Key::F1;
case 12:
return Key::F2;
case 13:
return Key::F3;
case 14:
return Key::F4;
case 15:
return Key::F5;
case 17: // not a typo
return Key::F6;
case 18:
return Key::F7;
case 19:
return Key::F8;
case 20:
return Key::F9;
case 21:
return Key::F10;
case 23: // not a typo
return Key::F11;
case 24:
return Key::F12;
default:
return Key::None;
}
}
case ';':
switch (key)
{
case 1: // xterm
{
key = wgetch(m_window);
Key::Type modifier = get_xterm_modifier_key(key);
if (modifier == Key::None)
return Key::None;
key = wgetch(m_window);
switch (key)
{
case 'A':
return modifier | Key::Up;
case 'B':
return modifier | Key::Down;
case 'C':
return modifier | Key::Right;
case 'D':
return modifier | Key::Left;
case 'F':
return modifier | Key::End;
case 'H':
return modifier | Key::Home;