331 lines
11 KiB
C++
331 lines
11 KiB
C++
/**
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* @author Christian Burger (christian@krikkel.de)
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*/
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#include <NCurses/PtyWindow.hpp>
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#include "Debug.hpp"
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#include <cstdio>
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#include <unistd.h>
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#include <sys/select.h>
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#include <gsl/gsl>
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#include <cctype>
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#include <termios.h>
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#include <fcntl.h>
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namespace krikkel::NCurses
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{
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using gsl::narrow;
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using std::lock_guard;
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PtyWindow::PtyWindow(std::mutex *writeToNCursesMutex, int lines, int columns, int y, int x)
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: writeToNCursesMutex(writeToNCursesMutex), Window(lines, columns, y, x)
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{
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// to get the original terminal we need to shutdown ncurses for a moment
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/// @todo maybe try `reset_prog_mode()` and `reset_shell_mode()` instead
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::endwin();
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tcgetattr(STDIN_FILENO, &terminalParameters);
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::refresh();
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winsize windowSize =
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{
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.ws_row = narrow<short unsigned int>(this->height())
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, .ws_col = narrow<short unsigned int>(this->width())
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};
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openpty(&fdPtyHost, &fdPtyClient, NULL, &terminalParameters, &windowSize);
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pseudoTerminal = vterm_new(windowSize.ws_row, windowSize.ws_col);
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vterm_set_utf8(pseudoTerminal, true);
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pseudoTerminalScreen = vterm_obtain_screen(pseudoTerminal);
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vterm_screen_reset(pseudoTerminalScreen, true);
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vterm_screen_set_callbacks(pseudoTerminalScreen, &screenCallbacks, this);
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vterm_output_set_callback(pseudoTerminal, &staticHandlerOutput, this);
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vterm_screen_enable_altscreen(pseudoTerminalScreen, true);
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//raw(); //— cbreak might suffice
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//noecho(); — already set
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//nodelay(true); — @todo needs some reprogramming
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keypad(true);
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nonl();
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/// @todo block all signals, this thread does not handle any
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readPtyClientThread =
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std::thread(&PtyWindow::readFromPtyClientThreadMethod, this);
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}
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PtyWindow::~PtyWindow()
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{
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close(fdPtyHost);
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close(fdPtyClient);
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vterm_free(pseudoTerminal);
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}
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int PtyWindow::getFdPtyClient() const
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{
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return fdPtyClient;
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}
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void PtyWindow::writeToClient(const char *output, size_t length)
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{
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lock_guard writeLock(writeToPseudoTerminalMutex);
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write(fdPtyHost, output, length);
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__debug_log("written to PTY client: '" + __debug_make_bytes_printable(std::string(output, length)) + '\'');
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}
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void PtyWindow::writeUnicodeCharToClient(wint_t character)
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{
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vterm_keyboard_unichar(pseudoTerminal, character, VTERM_MOD_NONE);
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}
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void PtyWindow::writeKeyToClient(VTermKey key)
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{
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__debug_log("writing key: " + std::to_string(key));
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vterm_keyboard_key(pseudoTerminal, key, VTERM_MOD_NONE);
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}
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void PtyWindow::readFromPtyClientThreadMethod()
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{
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/// @todo in theory, there is no need for a timeout or select …
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/// file descriptor is blocking
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while(1)
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{
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readFromPtyClient();
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struct timeval timeout = { .tv_sec = 0, .tv_usec = 200000 };
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fd_set readFds;
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FD_ZERO(&readFds);
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FD_SET(fdPtyHost, &readFds);
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if(select(fdPtyHost + 1, &readFds, NULL, NULL, &timeout) < 0)
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break;
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}
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}
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void PtyWindow::readFromPtyClient()
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{
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size_t bytesRead = read(fdPtyHost, ptyClientOutputBuffer, PTY_CLIENT_OUTPUT_BUFFER_SIZE);
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if(bytesRead != -1 && bytesRead != 0)
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{
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lock_guard writeLock(writeToPseudoTerminalMutex);
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vterm_input_write(pseudoTerminal, ptyClientOutputBuffer, bytesRead);
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}
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__debug_log("read from PTY client: '" + __debug_make_bytes_printable(std::string(ptyClientOutputBuffer, bytesRead)) + '\'');
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}
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VTermScreenCallbacks PtyWindow::screenCallbacks =
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{
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.damage = staticHandlerDamage,
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.moverect = staticHandlerMoveRect,
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.movecursor = staticHandlerMoveCursor,
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.settermprop = staticHandlerSetTermProp,
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.bell = staticHandlerBell,
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.resize = staticHandlerResize,
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.sb_pushline = staticHandlerPushLine,
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.sb_popline = staticHandlerPopLine,
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};
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int PtyWindow::handlerDamage(VTermRect rect)
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{
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for(int x = rect.start_col; x < rect.end_col; ++x)
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for(int y = rect.start_row; y < rect.end_row; ++y)
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copyPtyCellToNCursesWindow(x, y);
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refresh();
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return 0;
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}
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int PtyWindow::handlerMoveRect(VTermRect dest, VTermRect src)
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{
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__debug_log("(unimplemented) move content in rectangle from ("
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+ std::to_string(src.start_col) + ", "
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+ std::to_string(src.start_row) + ", "
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+ std::to_string(src.end_col) + ", "
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+ std::to_string(src.end_row) + ") "
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+ "size: " + std::to_string((src.start_col - src.end_col) * (src.start_row - src.end_row))
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+ " to ("
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+ std::to_string(dest.start_col) + ", "
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+ std::to_string(dest.start_row) + ", "
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+ std::to_string(dest.end_col) + ", "
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+ std::to_string(dest.end_row) + ") "
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+ "size: " + std::to_string((dest.start_col - dest.end_col) * (dest.start_row - dest.end_row)));
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return 0;
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}
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int PtyWindow::handlerMoveCursor(VTermPos pos, VTermPos oldpos, int visible)
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{
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/// @todo maybe use `mvcur()` instead?
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cursorX = pos.col;
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cursorY = pos.row;
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refresh();
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return 0;
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}
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int PtyWindow::handlerSetTermProp(VTermProp prop, VTermValue *val)
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{
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/// @todo maybe use "vterm_get_prop_type() —> bool, number, string"?
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__debug_stringify_switch_begin(handlerSetTermProp, prop, val);
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__debug_stringify_switch_case(VTERM_PROP_CURSORVISIBLE);
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__debug_stringify_switch_case(VTERM_PROP_CURSORBLINK);
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__debug_stringify_switch_case(VTERM_PROP_ALTSCREEN);
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__debug_stringify_switch_case(VTERM_PROP_REVERSE);
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__debug_stringify_switch_case_end_bool(val->boolean);
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__debug_stringify_switch_case(VTERM_PROP_TITLE);
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__debug_stringify_switch_case(VTERM_PROP_ICONNAME);
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__debug_stringify_switch_case_end_string(val->string);
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__debug_stringify_switch_case(VTERM_PROP_CURSORSHAPE);
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__debug_stringify_switch_case(VTERM_PROP_MOUSE);
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__debug_stringify_switch_case_end_number(val->number);
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__debug_stringify_switch_end(prop);
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__debug_log(std::string("unimplemented handler called: ")
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+ __debug_stringify_get_string(handlerSetTermProp)
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);
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return 0;
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}
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int PtyWindow::handlerBell()
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{
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beep();
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return 0;
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}
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int PtyWindow::handlerResize(int rows, int cols)
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{
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__debug_log("unimplemented handler called");
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return 0;
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}
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int PtyWindow::handlerPushLine(int cols, const VTermScreenCell *cells)
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{
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__debug_log("(unimplemented) push line with " + std::to_string(cols) + " columns");
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return 0;
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}
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int PtyWindow::handlerPopLine(int cols, VTermScreenCell *cells)
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{
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__debug_log("unimplemented handler called");
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return 0;
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}
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attr_t PtyWindow::extractAttributesFromVTermCell(VTermScreenCell vTermCell)
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{
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attr_t result = A_NORMAL;
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//__debug_log("unimplemented method called");
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return result;
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}
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short PtyWindow::extractColorFromVTermCell(VTermScreenCell vTermCell)
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{
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//__debug_log("unimplemented method called");
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return 0;
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}
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void PtyWindow::copyPtyCellToNCursesWindow(int x, int y)
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{
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VTermPos cellPosition = {y, x};
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VTermScreenCell vTermCell;
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cchar_t converted;
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attr_t formatting;
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short colorPair;
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wchar_t character;
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vterm_screen_get_cell(pseudoTerminalScreen, cellPosition, &vTermCell);
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formatting = extractAttributesFromVTermCell(vTermCell);
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colorPair = extractColorFromVTermCell(vTermCell);
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if(vTermCell.chars[0] == 0)
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character = ' ';
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else
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character = *vTermCell.chars;
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{
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lock_guard nCursesLock(*writeToNCursesMutex);
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setcchar(&converted, &character, formatting, colorPair, NULL);
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move(cellPosition.row, cellPosition.col);
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chgat(1, formatting, colorPair, NULL);
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add_wch(&converted);
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}
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}
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int PtyWindow::refresh()
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{
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lock_guard nCursesLock(*writeToNCursesMutex);
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move(cursorY, cursorX);
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return NCursesWindow::refresh();
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}
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/// @todo potential racing condition where drawing into terminal while
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/// resizing?
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int PtyWindow::wresize(int rows, int cols)
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{
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{
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lock_guard writeLock(writeToPseudoTerminalMutex);
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winsize windowSize =
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{
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.ws_row = narrow<unsigned short>(rows)
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, .ws_col = narrow<unsigned short>(cols)
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};
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ioctl(fdPtyHost, TIOCSWINSZ, &windowSize);
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vterm_set_size(pseudoTerminal, rows, cols);
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}
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{
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lock_guard nCursesLock(*writeToNCursesMutex);
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return NCursesWindow::wresize(rows, cols);
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}
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}
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int PtyWindow::staticHandlerDamage(VTermRect rect, void *user)
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{
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PtyWindow *instance = static_cast<PtyWindow *>(user);
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return instance->handlerDamage(rect);
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}
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int PtyWindow::staticHandlerMoveRect(VTermRect dest, VTermRect src, void *user)
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{
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PtyWindow *instance = static_cast<PtyWindow *>(user);
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return instance->handlerMoveRect(dest, src);
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}
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int PtyWindow::staticHandlerMoveCursor(VTermPos pos, VTermPos oldpos, int visible, void *user)
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{
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PtyWindow *instance = static_cast<PtyWindow *>(user);
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return instance->handlerMoveCursor(pos, oldpos, visible);
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}
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int PtyWindow::staticHandlerSetTermProp(VTermProp prop, VTermValue *val, void *user)
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{
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PtyWindow *instance = static_cast<PtyWindow *>(user);
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return instance->handlerSetTermProp(prop, val);
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}
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int PtyWindow::staticHandlerBell(void *user)
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{
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PtyWindow *instance = static_cast<PtyWindow *>(user);
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return instance->handlerBell();
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}
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int PtyWindow::staticHandlerResize(int rows, int cols, void *user)
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{
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PtyWindow *instance = static_cast<PtyWindow *>(user);
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return instance->handlerResize(rows, cols);
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}
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int PtyWindow::staticHandlerPushLine(int cols, const VTermScreenCell *cells, void *user)
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{
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PtyWindow *instance = static_cast<PtyWindow *>(user);
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return instance->handlerPushLine(cols, cells);
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}
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int PtyWindow::staticHandlerPopLine(int cols, VTermScreenCell *cells, void *user)
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{
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PtyWindow *instance = static_cast<PtyWindow *>(user);
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return instance->handlerPopLine(cols, cells);
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}
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void PtyWindow::staticHandlerOutput(const char *s, size_t len, void *user)
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{
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PtyWindow *instance = static_cast<PtyWindow *>(user);
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__debug_log("output handler writing to client: '" + __debug_make_bytes_printable(std::string(s, len)) + "'");
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instance->writeToClient(s, len);
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}
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} |