1325 lines
32 KiB
C
1325 lines
32 KiB
C
/* vim: tabstop=4 shiftwidth=4 noexpandtab
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* This file is part of ToaruOS and is released under the terms
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* of the NCSA / University of Illinois License - see LICENSE.md
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* Copyright (C) 2014-2018 K. Lange
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*
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* Terminal Emulator - VGA
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*/
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#include <stdio.h>
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#include <stdint.h>
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#include <string.h>
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#include <stdlib.h>
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#include <signal.h>
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#include <time.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <sys/stat.h>
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#include <sys/ioctl.h>
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#include <sys/time.h>
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#include <sys/wait.h>
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#include <getopt.h>
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#include <errno.h>
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#include <pty.h>
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#include <sys/fswait.h>
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#include <wchar.h>
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#include <toaru/decodeutf8.h>
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#include <toaru/kbd.h>
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#include <toaru/graphics.h>
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#include <toaru/termemu.h>
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#include <toaru/mouse.h>
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#include "vga-palette.h"
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#define USE_BELL 0
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/* master and slave pty descriptors */
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static int fd_master, fd_slave;
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static FILE * terminal;
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uint16_t term_width = 80; /* Width of the terminal (in cells) */
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uint16_t term_height = 25; /* Height of the terminal (in cells) */
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uint16_t csr_x = 0; /* Cursor X */
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uint16_t csr_y = 0; /* Cursor Y */
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term_cell_t * term_buffer = NULL; /* The terminal cell buffer */
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uint32_t current_fg = 7; /* Current foreground color */
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uint32_t current_bg = 0; /* Current background color */
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uint8_t cursor_on = 1; /* Whether or not the cursor should be rendered */
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uint8_t _login_shell = 0; /* Whether we're going to display a login shell or not */
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uint64_t mouse_ticks = 0;
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int selection = 0;
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int selection_start_x = 0;
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int selection_start_y = 0;
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int selection_end_x = 0;
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int selection_end_y = 0;
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char * selection_text = NULL;
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#define char_width 1
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#define char_height 1
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term_state_t * ansi_state = NULL;
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void reinit(void); /* Defined way further down */
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void term_redraw_cursor();
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void term_clear();
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void dump_buffer();
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static uint64_t get_ticks(void) {
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struct timeval now;
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gettimeofday(&now, NULL);
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return (uint64_t)now.tv_sec * 1000000LL + (uint64_t)now.tv_usec;
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}
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static int color_distance(uint32_t a, uint32_t b) {
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int a_r = (a & 0xFF0000) >> 16;
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int a_g = (a & 0xFF00) >> 8;
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int a_b = (a & 0xFF);
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int b_r = (b & 0xFF0000) >> 16;
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int b_g = (b & 0xFF00) >> 8;
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int b_b = (b & 0xFF);
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int distance = 0;
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distance += abs(a_r - b_r) * 3;
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distance += abs(a_g - b_g) * 6;
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distance += abs(a_b - b_b) * 10;
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return distance;
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}
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static uint32_t vga_base_colors[] = {
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0x000000,
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0xAA0000,
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0x00AA00,
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0xAA5500,
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0x0000AA,
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0xAA00AA,
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0x00AAAA,
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0xAAAAAA,
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0x555555,
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0xFF5555,
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0x55AA55,
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0xFFFF55,
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0x5555FF,
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0xFF55FF,
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0x55FFFF,
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0xFFFFFF,
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};
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#if 0
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static int is_gray(uint32_t a) {
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int a_r = (a & 0xFF0000) >> 16;
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int a_g = (a & 0xFF00) >> 8;
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int a_b = (a & 0xFF);
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return (a_r == a_g && a_g == a_b);
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}
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#endif
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static int best_match(uint32_t a) {
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int best_distance = INT32_MAX;
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int best_index = 0;
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for (int j = 0; j < 16; ++j) {
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int distance = color_distance(a, vga_base_colors[j]);
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if (distance < best_distance) {
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best_index = j;
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best_distance = distance;
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}
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}
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return best_index;
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}
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volatile int exit_application = 0;
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/* Returns the lower of two shorts */
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uint16_t min(uint16_t a, uint16_t b) {
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return (a < b) ? a : b;
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}
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/* Returns the higher of two shorts */
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uint16_t max(uint16_t a, uint16_t b) {
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return (a > b) ? a : b;
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}
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void set_title(char * c) {
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/* Do nothing */
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}
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static void cell_redraw(uint16_t x, uint16_t y);
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static void cell_redraw_inverted(uint16_t x, uint16_t y);
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void iterate_selection(void (*func)(uint16_t x, uint16_t y)) {
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if (selection_end_y < selection_start_y) {
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for (int x = selection_end_x; x < term_width; ++x) {
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func(x, selection_end_y);
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}
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for (int y = selection_end_y + 1; y < selection_start_y; ++y) {
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for (int x = 0; x < term_width; ++x) {
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func(x, y);
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}
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}
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for (int x = 0; x <= selection_start_x; ++x) {
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func(x, selection_start_y);
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}
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} else if (selection_start_y == selection_end_y) {
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if (selection_start_x > selection_end_x) {
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for (int x = selection_end_x; x <= selection_start_x; ++x) {
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func(x, selection_start_y);
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}
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} else {
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for (int x = selection_start_x; x <= selection_end_x; ++x) {
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func(x, selection_start_y);
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}
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}
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} else {
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for (int x = selection_start_x; x < term_width; ++x) {
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func(x, selection_start_y);
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}
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for (int y = selection_start_y + 1; y < selection_end_y; ++y) {
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for (int x = 0; x < term_width; ++x) {
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func(x, y);
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}
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}
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for (int x = 0; x <= selection_end_x; ++x) {
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func(x, selection_end_y);
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}
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}
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}
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void redraw_selection(void) {
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iterate_selection(cell_redraw_inverted);
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}
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static void redraw_new_selection(int old_x, int old_y) {
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if (selection_end_y == selection_start_y && old_y != selection_start_y) {
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int a, b;
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a = selection_end_x;
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b = selection_end_y;
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selection_end_x = old_x;
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selection_end_y = old_y;
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iterate_selection(cell_redraw);
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selection_end_x = a;
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selection_end_y = b;
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iterate_selection(cell_redraw_inverted);
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} else {
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int a, b;
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a = selection_start_x;
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b = selection_start_y;
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selection_start_x = old_x;
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selection_start_y = old_y;
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/* Figure out direction */
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if (old_y < b) {
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/* Backwards */
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if (selection_end_y < old_y || (selection_end_y == old_y && selection_end_x < old_x)) {
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/* Selection extended */
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iterate_selection(cell_redraw_inverted);
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} else {
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/* Selection got smaller */
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iterate_selection(cell_redraw);
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}
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} else if (old_y == b) {
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/* Was a single line */
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if (selection_end_y == b) {
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/* And still is */
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if (old_x < a) {
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/* Backwards */
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if (selection_end_x < old_x) {
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iterate_selection(cell_redraw_inverted);
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} else {
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iterate_selection(cell_redraw);
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}
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} else {
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if (selection_end_x < old_x) {
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iterate_selection(cell_redraw);
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} else {
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iterate_selection(cell_redraw_inverted);
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}
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}
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} else if (selection_end_y < b) {
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/* Moved up */
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if (old_x <= a) {
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/* Should be fine with just append */
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iterate_selection(cell_redraw_inverted);
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} else {
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/* Need to erase first */
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iterate_selection(cell_redraw);
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selection_start_x = a;
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selection_start_y = b;
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iterate_selection(cell_redraw_inverted);
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}
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} else if (selection_end_y > b) {
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if (old_x >= a) {
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/* Should be fine with just append */
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iterate_selection(cell_redraw_inverted);
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} else {
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/* Need to erase first */
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iterate_selection(cell_redraw);
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selection_start_x = a;
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selection_start_y = b;
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iterate_selection(cell_redraw_inverted);
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}
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}
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} else {
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/* Forward */
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if (selection_end_y < old_y || (selection_end_y == old_y && selection_end_x < old_x)) {
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/* Selection got smaller */
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iterate_selection(cell_redraw);
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} else {
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/* Selection extended */
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iterate_selection(cell_redraw_inverted);
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}
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}
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cell_redraw_inverted(a,b);
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cell_redraw_inverted(selection_end_x, selection_end_y);
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/* Restore */
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selection_start_x = a;
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selection_start_y = b;
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}
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}
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static int _selection_count = 0;
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static int _selection_i = 0;
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static int to_eight(uint32_t codepoint, char * out) {
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memset(out, 0x00, 7);
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if (codepoint < 0x0080) {
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out[0] = (char)codepoint;
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} else if (codepoint < 0x0800) {
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out[0] = 0xC0 | (codepoint >> 6);
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out[1] = 0x80 | (codepoint & 0x3F);
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} else if (codepoint < 0x10000) {
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out[0] = 0xE0 | (codepoint >> 12);
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out[1] = 0x80 | ((codepoint >> 6) & 0x3F);
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out[2] = 0x80 | (codepoint & 0x3F);
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} else if (codepoint < 0x200000) {
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out[0] = 0xF0 | (codepoint >> 18);
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out[1] = 0x80 | ((codepoint >> 12) & 0x3F);
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out[2] = 0x80 | ((codepoint >> 6) & 0x3F);
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out[3] = 0x80 | ((codepoint) & 0x3F);
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} else if (codepoint < 0x4000000) {
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out[0] = 0xF8 | (codepoint >> 24);
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out[1] = 0x80 | (codepoint >> 18);
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out[2] = 0x80 | ((codepoint >> 12) & 0x3F);
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out[3] = 0x80 | ((codepoint >> 6) & 0x3F);
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out[4] = 0x80 | ((codepoint) & 0x3F);
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} else {
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out[0] = 0xF8 | (codepoint >> 30);
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out[1] = 0x80 | ((codepoint >> 24) & 0x3F);
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out[2] = 0x80 | ((codepoint >> 18) & 0x3F);
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out[3] = 0x80 | ((codepoint >> 12) & 0x3F);
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out[4] = 0x80 | ((codepoint >> 6) & 0x3F);
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out[5] = 0x80 | ((codepoint) & 0x3F);
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}
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return strlen(out);
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}
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void count_selection(uint16_t x, uint16_t y) {
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term_cell_t * cell = (term_cell_t *)((uintptr_t)term_buffer + (y * term_width + x) * sizeof(term_cell_t));
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if (((uint32_t *)cell)[0] != 0x00000000) {
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char tmp[7];
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_selection_count += to_eight(cell->c, tmp);
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}
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if (x == term_width - 1) {
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_selection_count++;
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}
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}
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void write_selection(uint16_t x, uint16_t y) {
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term_cell_t * cell = (term_cell_t *)((uintptr_t)term_buffer + (y * term_width + x) * sizeof(term_cell_t));
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if (((uint32_t *)cell)[0] != 0x00000000) {
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char tmp[7];
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int count = to_eight(cell->c, tmp);
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for (int i = 0; i < count; ++i) {
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selection_text[_selection_i] = tmp[i];
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_selection_i++;
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}
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}
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if (x == term_width - 1) {
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selection_text[_selection_i] = '\n';;
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_selection_i++;
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}
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}
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char * copy_selection(void) {
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_selection_count = 0;
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iterate_selection(count_selection);
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if (selection_text) {
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free(selection_text);
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}
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if (_selection_count == 0) {
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return NULL;
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}
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selection_text = malloc(_selection_count + 1);
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selection_text[_selection_count] = '\0';
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_selection_i = 0;
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iterate_selection(write_selection);
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if (selection_text[_selection_count-1] == '\n') {
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/* Don't end on a line feed */
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selection_text[_selection_count-1] = '\0';
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}
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return selection_text;
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}
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void input_buffer_stuff(char * str) {
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size_t s = strlen(str) + 1;
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write(fd_master, str, s);
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}
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unsigned short * textmemptr = (unsigned short *)0xB8000;
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void placech(unsigned char c, int x, int y, int attr) {
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unsigned short *where;
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unsigned att = attr << 8;
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where = textmemptr + (y * 80 + x);
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*where = c | att;
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}
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/* ANSI-to-VGA */
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char vga_to_ansi[] = {
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0, 4, 2, 6, 1, 5, 3, 7,
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8,12,10,14, 9,13,11,15
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};
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uint32_t ununicode(uint32_t c) {
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switch (c) {
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case L'☺': return 1;
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case L'☻': return 2;
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case L'♥': return 3;
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case L'♦': return 4;
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case L'♣': return 5;
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case L'♠': return 6;
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case L'•': return 7;
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case L'◘': return 8;
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case L'○': return 9;
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case L'◙': return 10;
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case L'♂': return 11;
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case L'♀': return 12;
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case L'♪': return 13;
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case L'♫': return 14;
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case L'☼': return 15;
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case L'►': return 16;
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case L'◄': return 17;
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case L'↕': return 18;
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case L'‼': return 19;
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case L'¶': return 20;
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case L'§': return 21;
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case L'▬': return 22;
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case L'↨': return 23;
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case L'↑': return 24;
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case L'↓': return 25;
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case L'→': return 26;
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case L'←': return 27;
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case L'∟': return 28;
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case L'↔': return 29;
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case L'▲': return 30;
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case L'▼': return 31;
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/* ASCII text */
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case L'⌂': return 127;
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case L'Ç': return 128;
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case L'ü': return 129;
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case L'é': return 130;
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case L'â': return 131;
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case L'ä': return 132;
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case L'à': return 133;
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case L'å': return 134;
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case L'ç': return 135;
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case L'ê': return 136;
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case L'ë': return 137;
|
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case L'è': return 138;
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case L'ï': return 139;
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case L'î': return 140;
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case L'ì': return 141;
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case L'Ä': return 142;
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case L'Å': return 143;
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case L'É': return 144;
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case L'æ': return 145;
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case L'Æ': return 146;
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case L'ô': return 147;
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case L'ö': return 148;
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case L'ò': return 149;
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case L'û': return 150;
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case L'ù': return 151;
|
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case L'ÿ': return 152;
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case L'Ö': return 153;
|
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case L'Ü': return 154;
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case L'¢': return 155;
|
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case L'£': return 156;
|
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case L'¥': return 157;
|
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case L'₧': return 158;
|
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case L'ƒ': return 159;
|
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case L'á': return 160;
|
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case L'í': return 161;
|
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case L'ó': return 162;
|
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case L'ú': return 163;
|
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case L'ñ': return 164;
|
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case L'Ñ': return 165;
|
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case L'ª': return 166;
|
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case L'º': return 167;
|
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case L'¿': return 168;
|
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case L'⌐': return 169;
|
||
case L'¬': return 170;
|
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case L'½': return 171;
|
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case L'¼': return 172;
|
||
case L'¡': return 173;
|
||
case L'«': return 174;
|
||
case L'»': return 175;
|
||
case L'░': return 176;
|
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case L'▒': return 177;
|
||
case L'▓': return 178;
|
||
case L'│': return 179;
|
||
case L'┤': return 180;
|
||
case L'╡': return 181;
|
||
case L'╢': return 182;
|
||
case L'╖': return 183;
|
||
case L'╕': return 184;
|
||
case L'╣': return 185;
|
||
case L'║': return 186;
|
||
case L'╗': return 187;
|
||
case L'╝': return 188;
|
||
case L'╜': return 189;
|
||
case L'╛': return 190;
|
||
case L'┐': return 191;
|
||
case L'└': return 192;
|
||
case L'┴': return 193;
|
||
case L'┬': return 194;
|
||
case L'├': return 195;
|
||
case L'─': return 196;
|
||
case L'┼': return 197;
|
||
case L'╞': return 198;
|
||
case L'╟': return 199;
|
||
case L'╚': return 200;
|
||
case L'╔': return 201;
|
||
case L'╩': return 202;
|
||
case L'╦': return 203;
|
||
case L'╠': return 204;
|
||
case L'═': return 205;
|
||
case L'╬': return 206;
|
||
case L'╧': return 207;
|
||
case L'╨': return 208;
|
||
case L'╤': return 209;
|
||
case L'╥': return 210;
|
||
case L'╙': return 211;
|
||
case L'╘': return 212;
|
||
case L'╒': return 213;
|
||
case L'╓': return 214;
|
||
case L'╫': return 215;
|
||
case L'╪': return 216;
|
||
case L'┘': return 217;
|
||
case L'┌': return 218;
|
||
case L'█': return 219;
|
||
case L'▄': return 220;
|
||
case L'▌': return 221;
|
||
case L'▐': return 222;
|
||
case L'▀': return 223;
|
||
case L'α': return 224;
|
||
case L'ß': return 225;
|
||
case L'Γ': return 226;
|
||
case L'π': return 227;
|
||
case L'Σ': return 228;
|
||
case L'σ': return 229;
|
||
case L'µ': return 230;
|
||
case L'τ': return 231;
|
||
case L'Φ': return 232;
|
||
case L'Θ': return 233;
|
||
case L'Ω': return 234;
|
||
case L'δ': return 235;
|
||
case L'∞': return 236;
|
||
case L'φ': return 237;
|
||
case L'ε': return 238;
|
||
case L'∩': return 239;
|
||
case L'≡': return 240;
|
||
case L'±': return 241;
|
||
case L'≥': return 242;
|
||
case L'≤': return 243;
|
||
case L'⌠': return 244;
|
||
case L'⌡': return 245;
|
||
case L'÷': return 246;
|
||
case L'≈': return 247;
|
||
case L'°': return 248;
|
||
case L'∙': return 249;
|
||
case L'·': return 250;
|
||
case L'√': return 251;
|
||
case L'ⁿ': return 252;
|
||
case L'²': return 253;
|
||
case L'■': return 254;
|
||
}
|
||
return 4;
|
||
}
|
||
|
||
void
|
||
term_write_char(
|
||
uint32_t val,
|
||
uint16_t x,
|
||
uint16_t y,
|
||
uint32_t fg,
|
||
uint32_t bg,
|
||
uint8_t flags
|
||
) {
|
||
if (val > 128) val = ununicode(val);
|
||
if (fg > 256) {
|
||
fg = best_match(fg);
|
||
}
|
||
if (bg > 256) {
|
||
bg = best_match(bg);
|
||
}
|
||
if (fg > 16) {
|
||
fg = vga_colors[fg];
|
||
}
|
||
if (bg > 16) {
|
||
bg = vga_colors[bg];
|
||
}
|
||
if (fg == 16) fg = 0;
|
||
if (bg == 16) bg = 0;
|
||
placech(val, x, y, (vga_to_ansi[fg] & 0xF) | (vga_to_ansi[bg] << 4));
|
||
}
|
||
|
||
static void cell_set(uint16_t x, uint16_t y, uint32_t c, uint32_t fg, uint32_t bg, uint8_t flags) {
|
||
if (x >= term_width || y >= term_height) return;
|
||
term_cell_t * cell = (term_cell_t *)((uintptr_t)term_buffer + (y * term_width + x) * sizeof(term_cell_t));
|
||
cell->c = c;
|
||
cell->fg = fg;
|
||
cell->bg = bg;
|
||
cell->flags = flags;
|
||
}
|
||
|
||
static void cell_redraw(uint16_t x, uint16_t y) {
|
||
if (x >= term_width || y >= term_height) return;
|
||
term_cell_t * cell = (term_cell_t *)((uintptr_t)term_buffer + (y * term_width + x) * sizeof(term_cell_t));
|
||
if (((uint32_t *)cell)[0] == 0x00000000) {
|
||
term_write_char(' ', x * char_width, y * char_height, TERM_DEFAULT_FG, TERM_DEFAULT_BG, TERM_DEFAULT_FLAGS);
|
||
} else {
|
||
term_write_char(cell->c, x * char_width, y * char_height, cell->fg, cell->bg, cell->flags);
|
||
}
|
||
}
|
||
|
||
static void cell_redraw_inverted(uint16_t x, uint16_t y) {
|
||
if (x >= term_width || y >= term_height) return;
|
||
term_cell_t * cell = (term_cell_t *)((uintptr_t)term_buffer + (y * term_width + x) * sizeof(term_cell_t));
|
||
if (((uint32_t *)cell)[0] == 0x00000000) {
|
||
term_write_char(' ', x * char_width, y * char_height, TERM_DEFAULT_BG, TERM_DEFAULT_FG, TERM_DEFAULT_FLAGS | ANSI_SPECBG);
|
||
} else {
|
||
term_write_char(cell->c, x * char_width, y * char_height, cell->bg, cell->fg, cell->flags | ANSI_SPECBG);
|
||
}
|
||
}
|
||
|
||
#if 0
|
||
static void cell_redraw_box(uint16_t x, uint16_t y) {
|
||
if (x >= term_width || y >= term_height) return;
|
||
term_cell_t * cell = (term_cell_t *)((uintptr_t)term_buffer + (y * term_width + x) * sizeof(term_cell_t));
|
||
if (((uint32_t *)cell)[0] == 0x00000000) {
|
||
term_write_char(' ', x * char_width, y * char_height, TERM_DEFAULT_FG, TERM_DEFAULT_BG, TERM_DEFAULT_FLAGS | ANSI_BORDER);
|
||
} else {
|
||
term_write_char(cell->c, x * char_width, y * char_height, cell->fg, cell->bg, cell->flags | ANSI_BORDER);
|
||
}
|
||
}
|
||
#endif
|
||
|
||
void render_cursor() {
|
||
cell_redraw_inverted(csr_x, csr_y);
|
||
}
|
||
|
||
static uint8_t cursor_flipped = 0;
|
||
void draw_cursor() {
|
||
if (!cursor_on) return;
|
||
mouse_ticks = get_ticks();
|
||
cursor_flipped = 0;
|
||
render_cursor();
|
||
}
|
||
|
||
void term_redraw_all() {
|
||
for (uint16_t y = 0; y < term_height; ++y) {
|
||
for (uint16_t x = 0; x < term_width; ++x) {
|
||
cell_redraw(x,y);
|
||
}
|
||
}
|
||
}
|
||
|
||
void term_scroll(int how_much) {
|
||
if (how_much >= term_height || -how_much >= term_height) {
|
||
term_clear();
|
||
return;
|
||
}
|
||
if (how_much == 0) {
|
||
return;
|
||
}
|
||
if (how_much > 0) {
|
||
/* Shift terminal cells one row up */
|
||
memmove(term_buffer, (void *)((uintptr_t)term_buffer + sizeof(term_cell_t) * term_width), sizeof(term_cell_t) * term_width * (term_height - how_much));
|
||
/* Reset the "new" row to clean cells */
|
||
memset((void *)((uintptr_t)term_buffer + sizeof(term_cell_t) * term_width * (term_height - how_much)), 0x0, sizeof(term_cell_t) * term_width * how_much);
|
||
for (int i = 0; i < how_much; ++i) {
|
||
for (uint16_t x = 0; x < term_width; ++x) {
|
||
cell_set(x,term_height - how_much,' ', current_fg, current_bg, ansi_state->flags);
|
||
}
|
||
}
|
||
term_redraw_all();
|
||
} else {
|
||
how_much = -how_much;
|
||
/* Shift terminal cells one row up */
|
||
memmove((void *)((uintptr_t)term_buffer + sizeof(term_cell_t) * term_width), term_buffer, sizeof(term_cell_t) * term_width * (term_height - how_much));
|
||
/* Reset the "new" row to clean cells */
|
||
memset(term_buffer, 0x0, sizeof(term_cell_t) * term_width * how_much);
|
||
term_redraw_all();
|
||
}
|
||
}
|
||
|
||
int is_wide(uint32_t codepoint) {
|
||
if (codepoint < 256) return 0;
|
||
return wcwidth(codepoint) == 2;
|
||
}
|
||
|
||
void term_write(char c) {
|
||
static uint32_t codepoint = 0;
|
||
static uint32_t unicode_state = 0;
|
||
|
||
cell_redraw(csr_x, csr_y);
|
||
if (!decode(&unicode_state, &codepoint, (uint8_t)c)) {
|
||
if (c == '\r') {
|
||
csr_x = 0;
|
||
draw_cursor();
|
||
return;
|
||
}
|
||
if (csr_x == term_width) {
|
||
csr_x = 0;
|
||
++csr_y;
|
||
if (c == '\n') return;
|
||
}
|
||
if (csr_y == term_height) {
|
||
term_scroll(1);
|
||
csr_y = term_height - 1;
|
||
}
|
||
if (c == '\n') {
|
||
++csr_y;
|
||
if (csr_y == term_height) {
|
||
term_scroll(1);
|
||
csr_y = term_height - 1;
|
||
}
|
||
draw_cursor();
|
||
} else if (c == '\007') {
|
||
/* bell */
|
||
} else if (c == '\b') {
|
||
if (csr_x > 0) {
|
||
--csr_x;
|
||
}
|
||
cell_redraw(csr_x, csr_y);
|
||
draw_cursor();
|
||
} else if (c == '\t') {
|
||
csr_x += (8 - csr_x % 8);
|
||
draw_cursor();
|
||
} else {
|
||
int wide = is_wide(codepoint);
|
||
uint8_t flags = ansi_state->flags;
|
||
if (wide && csr_x == term_width - 1) {
|
||
csr_x = 0;
|
||
++csr_y;
|
||
}
|
||
if (wide) {
|
||
flags = flags | ANSI_WIDE;
|
||
}
|
||
cell_set(csr_x,csr_y, codepoint, current_fg, current_bg, flags);
|
||
cell_redraw(csr_x,csr_y);
|
||
csr_x++;
|
||
if (wide && csr_x != term_width) {
|
||
cell_set(csr_x, csr_y, 0xFFFF, current_fg, current_bg, ansi_state->flags);
|
||
cell_redraw(csr_x,csr_y);
|
||
cell_redraw(csr_x-1,csr_y);
|
||
csr_x++;
|
||
}
|
||
}
|
||
} else if (unicode_state == UTF8_REJECT) {
|
||
unicode_state = 0;
|
||
}
|
||
draw_cursor();
|
||
}
|
||
|
||
void term_set_csr(int x, int y) {
|
||
cell_redraw(csr_x,csr_y);
|
||
csr_x = x;
|
||
csr_y = y;
|
||
draw_cursor();
|
||
}
|
||
|
||
int term_get_csr_x() {
|
||
return csr_x;
|
||
}
|
||
|
||
int term_get_csr_y() {
|
||
return csr_y;
|
||
}
|
||
|
||
void term_set_csr_show(int on) {
|
||
cursor_on = on;
|
||
if (on) {
|
||
draw_cursor();
|
||
}
|
||
}
|
||
|
||
void term_set_colors(uint32_t fg, uint32_t bg) {
|
||
current_fg = fg;
|
||
current_bg = bg;
|
||
}
|
||
|
||
void term_redraw_cursor() {
|
||
if (term_buffer) {
|
||
draw_cursor();
|
||
}
|
||
}
|
||
|
||
void flip_cursor() {
|
||
if (cursor_flipped) {
|
||
cell_redraw(csr_x, csr_y);
|
||
} else {
|
||
render_cursor();
|
||
}
|
||
cursor_flipped = 1 - cursor_flipped;
|
||
}
|
||
|
||
void term_set_cell(int x, int y, uint32_t c) {
|
||
cell_set(x, y, c, current_fg, current_bg, ansi_state->flags);
|
||
cell_redraw(x, y);
|
||
}
|
||
|
||
void term_redraw_cell(int x, int y) {
|
||
if (x < 0 || y < 0 || x >= term_width || y >= term_height) return;
|
||
cell_redraw(x,y);
|
||
}
|
||
|
||
void term_clear(int i) {
|
||
if (i == 2) {
|
||
/* Oh dear */
|
||
csr_x = 0;
|
||
csr_y = 0;
|
||
memset((void *)term_buffer, 0x00, term_width * term_height * sizeof(term_cell_t));
|
||
term_redraw_all();
|
||
} else if (i == 0) {
|
||
for (int x = csr_x; x < term_width; ++x) {
|
||
term_set_cell(x, csr_y, ' ');
|
||
}
|
||
for (int y = csr_y + 1; y < term_height; ++y) {
|
||
for (int x = 0; x < term_width; ++x) {
|
||
term_set_cell(x, y, ' ');
|
||
}
|
||
}
|
||
} else if (i == 1) {
|
||
for (int y = 0; y < csr_y; ++y) {
|
||
for (int x = 0; x < term_width; ++x) {
|
||
term_set_cell(x, y, ' ');
|
||
}
|
||
}
|
||
for (int x = 0; x < csr_x; ++x) {
|
||
term_set_cell(x, csr_y, ' ');
|
||
}
|
||
}
|
||
}
|
||
|
||
#define INPUT_SIZE 1024
|
||
char input_buffer[INPUT_SIZE];
|
||
int input_collected = 0;
|
||
|
||
void clear_input() {
|
||
memset(input_buffer, 0x0, INPUT_SIZE);
|
||
input_collected = 0;
|
||
}
|
||
|
||
pid_t child_pid = 0;
|
||
|
||
void handle_input(char c) {
|
||
write(fd_master, &c, 1);
|
||
}
|
||
|
||
void handle_input_s(char * c) {
|
||
write(fd_master, c, strlen(c));
|
||
}
|
||
|
||
void key_event(int ret, key_event_t * event) {
|
||
if (ret) {
|
||
/* Special keys */
|
||
if ((event->modifiers & KEY_MOD_LEFT_SHIFT || event->modifiers & KEY_MOD_RIGHT_SHIFT) &&
|
||
(event->modifiers & KEY_MOD_LEFT_CTRL || event->modifiers & KEY_MOD_RIGHT_CTRL) &&
|
||
(event->keycode == 'c')) {
|
||
if (selection) {
|
||
/* Copy selection */
|
||
copy_selection();
|
||
}
|
||
return;
|
||
}
|
||
if ((event->modifiers & KEY_MOD_LEFT_SHIFT || event->modifiers & KEY_MOD_RIGHT_SHIFT) &&
|
||
(event->modifiers & KEY_MOD_LEFT_CTRL || event->modifiers & KEY_MOD_RIGHT_CTRL) &&
|
||
(event->keycode == 'v')) {
|
||
/* Paste selection */
|
||
if (selection_text) {
|
||
handle_input_s(selection_text);
|
||
}
|
||
return;
|
||
}
|
||
if (event->modifiers & KEY_MOD_LEFT_ALT || event->modifiers & KEY_MOD_RIGHT_ALT) {
|
||
handle_input('\033');
|
||
}
|
||
if ((event->modifiers & KEY_MOD_LEFT_SHIFT || event->modifiers & KEY_MOD_RIGHT_SHIFT) &&
|
||
event->key == '\t') {
|
||
handle_input_s("\033[Z");
|
||
return;
|
||
}
|
||
|
||
/* ENTER = reads as linefeed, should be carriage return */
|
||
if (event->keycode == 10) {
|
||
handle_input('\r');
|
||
return;
|
||
}
|
||
|
||
/* BACKSPACE = reads as ^H, should be ^? */
|
||
if (event->keycode == 8) {
|
||
handle_input(0x7F);
|
||
return;
|
||
}
|
||
|
||
handle_input(event->key);
|
||
} else {
|
||
if (event->action == KEY_ACTION_UP) return;
|
||
switch (event->keycode) {
|
||
case KEY_F1:
|
||
handle_input_s("\033OP");
|
||
break;
|
||
case KEY_F2:
|
||
handle_input_s("\033OQ");
|
||
break;
|
||
case KEY_F3:
|
||
handle_input_s("\033OR");
|
||
break;
|
||
case KEY_F4:
|
||
handle_input_s("\033OS");
|
||
break;
|
||
case KEY_F5:
|
||
handle_input_s("\033[15~");
|
||
break;
|
||
case KEY_F6:
|
||
handle_input_s("\033[17~");
|
||
break;
|
||
case KEY_F7:
|
||
handle_input_s("\033[18~");
|
||
break;
|
||
case KEY_F8:
|
||
handle_input_s("\033[19~");
|
||
break;
|
||
case KEY_F9:
|
||
handle_input_s("\033[20~");
|
||
break;
|
||
case KEY_F10:
|
||
handle_input_s("\033[21~");
|
||
break;
|
||
case KEY_F11:
|
||
handle_input_s("\033[23~");
|
||
break;
|
||
case KEY_F12:
|
||
handle_input_s("\033[24~");
|
||
break;
|
||
case KEY_ARROW_UP:
|
||
if (event->modifiers & KEY_MOD_LEFT_SHIFT && event->modifiers & KEY_MOD_LEFT_CTRL) {
|
||
handle_input_s("\033[6A");
|
||
} else if (event->modifiers & KEY_MOD_LEFT_CTRL) {
|
||
handle_input_s("\033[5A");
|
||
} else if (event->modifiers & KEY_MOD_LEFT_SHIFT && event->modifiers & KEY_MOD_LEFT_ALT) {
|
||
handle_input_s("\033[4A");
|
||
} else if (event->modifiers & KEY_MOD_LEFT_ALT) {
|
||
handle_input_s("\033[3A");
|
||
} else if (event->modifiers & KEY_MOD_LEFT_SHIFT) {
|
||
handle_input_s("\033[2A");
|
||
} else {
|
||
handle_input_s("\033[A");
|
||
}
|
||
break;
|
||
case KEY_ARROW_DOWN:
|
||
if (event->modifiers & KEY_MOD_LEFT_SHIFT && event->modifiers & KEY_MOD_LEFT_CTRL) {
|
||
handle_input_s("\033[6B");
|
||
} else if (event->modifiers & KEY_MOD_LEFT_CTRL) {
|
||
handle_input_s("\033[5B");
|
||
} else if (event->modifiers & KEY_MOD_LEFT_SHIFT && event->modifiers & KEY_MOD_LEFT_ALT) {
|
||
handle_input_s("\033[4B");
|
||
} else if (event->modifiers & KEY_MOD_LEFT_ALT) {
|
||
handle_input_s("\033[3B");
|
||
} else if (event->modifiers & KEY_MOD_LEFT_SHIFT) {
|
||
handle_input_s("\033[2B");
|
||
} else {
|
||
handle_input_s("\033[B");
|
||
}
|
||
break;
|
||
case KEY_ARROW_RIGHT:
|
||
if (event->modifiers & KEY_MOD_LEFT_SHIFT && event->modifiers & KEY_MOD_LEFT_CTRL) {
|
||
handle_input_s("\033[6C");
|
||
} else if (event->modifiers & KEY_MOD_LEFT_CTRL) {
|
||
handle_input_s("\033[5C");
|
||
} else if (event->modifiers & KEY_MOD_LEFT_SHIFT && event->modifiers & KEY_MOD_LEFT_ALT) {
|
||
handle_input_s("\033[4C");
|
||
} else if (event->modifiers & KEY_MOD_LEFT_ALT) {
|
||
handle_input_s("\033[3C");
|
||
} else if (event->modifiers & KEY_MOD_LEFT_SHIFT) {
|
||
handle_input_s("\033[2C");
|
||
} else {
|
||
handle_input_s("\033[C");
|
||
}
|
||
break;
|
||
case KEY_ARROW_LEFT:
|
||
if (event->modifiers & KEY_MOD_LEFT_SHIFT && event->modifiers & KEY_MOD_LEFT_CTRL) {
|
||
handle_input_s("\033[6D");
|
||
} else if (event->modifiers & KEY_MOD_LEFT_CTRL) {
|
||
handle_input_s("\033[5D");
|
||
} else if (event->modifiers & KEY_MOD_LEFT_SHIFT && event->modifiers & KEY_MOD_LEFT_ALT) {
|
||
handle_input_s("\033[4D");
|
||
} else if (event->modifiers & KEY_MOD_LEFT_ALT) {
|
||
handle_input_s("\033[3D");
|
||
} else if (event->modifiers & KEY_MOD_LEFT_SHIFT) {
|
||
handle_input_s("\033[2D");
|
||
} else {
|
||
handle_input_s("\033[D");
|
||
}
|
||
break;
|
||
case KEY_PAGE_UP:
|
||
handle_input_s("\033[5~");
|
||
break;
|
||
case KEY_PAGE_DOWN:
|
||
handle_input_s("\033[6~");
|
||
break;
|
||
case KEY_HOME:
|
||
handle_input_s("\033[H");
|
||
break;
|
||
case KEY_END:
|
||
handle_input_s("\033[F");
|
||
break;
|
||
case KEY_DEL:
|
||
handle_input_s("\033[3~");
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
|
||
void usage(char * argv[]) {
|
||
printf(
|
||
"VGA Terminal Emulator\n"
|
||
"\n"
|
||
"usage: %s [-b] [-F] [-h]\n"
|
||
"\n"
|
||
" -h --help \033[3mShow this help message.\033[0m\n"
|
||
"\n",
|
||
argv[0]);
|
||
}
|
||
|
||
int unsupported_int(void) { return 0; }
|
||
void unsupported(int x, int y, char * data) { }
|
||
|
||
term_callbacks_t term_callbacks = {
|
||
term_write,
|
||
term_set_colors,
|
||
term_set_csr,
|
||
term_get_csr_x,
|
||
term_get_csr_y,
|
||
term_set_cell,
|
||
term_clear,
|
||
term_scroll,
|
||
term_redraw_cursor,
|
||
input_buffer_stuff,
|
||
set_title,
|
||
unsupported,
|
||
unsupported_int,
|
||
unsupported_int,
|
||
term_set_csr_show,
|
||
NULL,
|
||
};
|
||
|
||
void reinit(void) {
|
||
if (term_buffer) {
|
||
/* Do nothing */
|
||
} else {
|
||
term_buffer = malloc(sizeof(term_cell_t) * term_width * term_height);
|
||
memset(term_buffer, 0x0, sizeof(term_cell_t) * term_width * term_height);
|
||
}
|
||
|
||
ansi_state = ansi_init(ansi_state, term_width, term_height, &term_callbacks);
|
||
term_redraw_all();
|
||
}
|
||
|
||
|
||
void maybe_flip_cursor(void) {
|
||
uint64_t ticks = get_ticks();
|
||
if (ticks > mouse_ticks + 600000LL) {
|
||
mouse_ticks = ticks;
|
||
flip_cursor();
|
||
}
|
||
}
|
||
|
||
|
||
void check_for_exit(void) {
|
||
if (exit_application) return;
|
||
|
||
pid_t pid = waitpid(-1, NULL, WNOHANG);
|
||
|
||
if (pid != child_pid) return;
|
||
|
||
/* Clean up */
|
||
exit_application = 1;
|
||
/* Exit */
|
||
char exit_message[] = "[Process terminated]\n";
|
||
write(fd_slave, exit_message, sizeof(exit_message));
|
||
}
|
||
|
||
static int mouse_x = 0;
|
||
static int mouse_y = 0;
|
||
static int last_mouse_buttons = 0;
|
||
static int mouse_is_dragging = 0;
|
||
|
||
#define MOUSE_X_R 820
|
||
#define MOUSE_Y_R 2621
|
||
|
||
static int old_x = 0;
|
||
static int old_y = 0;
|
||
|
||
void handle_mouse_event(mouse_device_packet_t * packet) {
|
||
if (mouse_is_dragging) {
|
||
if (packet->buttons & LEFT_CLICK) {
|
||
int old_end_x = selection_end_x;
|
||
int old_end_y = selection_end_y;
|
||
selection_end_x = mouse_x;
|
||
selection_end_y = mouse_y;
|
||
redraw_new_selection(old_end_x, old_end_y);
|
||
} else {
|
||
mouse_is_dragging = 0;
|
||
}
|
||
} else {
|
||
if (packet->buttons & LEFT_CLICK) {
|
||
term_redraw_all();
|
||
selection_start_x = mouse_x;
|
||
selection_start_y = mouse_y;
|
||
selection_end_x = mouse_x;
|
||
selection_end_y = mouse_y;
|
||
selection = 1;
|
||
redraw_selection();
|
||
mouse_is_dragging = 1;
|
||
} else {
|
||
cell_redraw(old_x, old_y);
|
||
cell_redraw_inverted(mouse_x, mouse_y);
|
||
old_x = mouse_x;
|
||
old_y = mouse_y;
|
||
}
|
||
}
|
||
|
||
|
||
}
|
||
|
||
static int rel_mouse_x = 0;
|
||
static int rel_mouse_y = 0;
|
||
|
||
void handle_mouse(mouse_device_packet_t * packet) {
|
||
rel_mouse_x += packet->x_difference;
|
||
rel_mouse_y -= packet->y_difference;
|
||
|
||
mouse_x = rel_mouse_x / 20;
|
||
mouse_y = rel_mouse_y / 40;
|
||
|
||
if (mouse_x < 0) mouse_x = 0;
|
||
if (mouse_y < 0) mouse_y = 0;
|
||
if (mouse_x >= term_width) mouse_x = term_width - 1;
|
||
if (mouse_y >= term_height) mouse_y = term_height - 1;
|
||
handle_mouse_event(packet);
|
||
}
|
||
|
||
void handle_mouse_abs(mouse_device_packet_t * packet) {
|
||
mouse_x = packet->x_difference / MOUSE_X_R;
|
||
mouse_y = packet->y_difference / MOUSE_Y_R;
|
||
|
||
rel_mouse_x = mouse_x * 20;
|
||
rel_mouse_y = mouse_y * 40;
|
||
|
||
handle_mouse_event(packet);
|
||
}
|
||
|
||
static int input_stopped = 0;
|
||
|
||
void sig_suspend_input(int sig) {
|
||
(void)sig;
|
||
char exit_message[] = "[Input stopped]\n";
|
||
write(fd_slave, exit_message, sizeof(exit_message));
|
||
|
||
input_stopped = 1;
|
||
|
||
signal(SIGUSR2, sig_suspend_input);
|
||
}
|
||
|
||
int main(int argc, char ** argv) {
|
||
|
||
_login_shell = 0;
|
||
|
||
static struct option long_opts[] = {
|
||
{"login", no_argument, 0, 'l'},
|
||
{"help", no_argument, 0, 'h'},
|
||
{0,0,0,0}
|
||
};
|
||
|
||
/* Read some arguments */
|
||
int index, c;
|
||
while ((c = getopt_long(argc, argv, "hl", long_opts, &index)) != -1) {
|
||
switch (c) {
|
||
case 'l':
|
||
_login_shell = 1;
|
||
break;
|
||
case 'h':
|
||
usage(argv);
|
||
return 0;
|
||
break;
|
||
case '?':
|
||
break;
|
||
default:
|
||
break;
|
||
}
|
||
}
|
||
|
||
putenv("TERM=toaru");
|
||
|
||
openpty(&fd_master, &fd_slave, NULL, NULL, NULL);
|
||
|
||
terminal = fdopen(fd_slave, "w");
|
||
|
||
struct winsize w;
|
||
w.ws_row = term_height;
|
||
w.ws_col = term_width;
|
||
w.ws_xpixel = 0;
|
||
w.ws_ypixel = 0;
|
||
ioctl(fd_master, TIOCSWINSZ, &w);
|
||
|
||
reinit();
|
||
|
||
fflush(stdin);
|
||
|
||
system("cursor-off"); /* Might GPF */
|
||
|
||
signal(SIGUSR2, sig_suspend_input);
|
||
|
||
int pid = getpid();
|
||
uint32_t f = fork();
|
||
|
||
if (getpid() != pid) {
|
||
setsid();
|
||
dup2(fd_slave, 0);
|
||
dup2(fd_slave, 1);
|
||
dup2(fd_slave, 2);
|
||
|
||
if (argv[optind] != NULL) {
|
||
char * tokens[] = {argv[optind], NULL};
|
||
execvp(tokens[0], tokens);
|
||
fprintf(stderr, "Failed to launch requested startup application.\n");
|
||
} else {
|
||
if (_login_shell) {
|
||
char * tokens[] = {"/bin/login-loop",NULL};
|
||
execvp(tokens[0], tokens);
|
||
exit(1);
|
||
} else {
|
||
char * shell = getenv("SHELL");
|
||
if (!shell) shell = "/bin/sh"; /* fallback */
|
||
char * tokens[] = {shell,NULL};
|
||
execvp(tokens[0], tokens);
|
||
exit(1);
|
||
}
|
||
}
|
||
|
||
exit_application = 1;
|
||
|
||
return 1;
|
||
} else {
|
||
|
||
child_pid = f;
|
||
|
||
int kfd = open("/dev/kbd", O_RDONLY);
|
||
key_event_t event;
|
||
char c;
|
||
int vmmouse = 0;
|
||
mouse_device_packet_t packet;
|
||
|
||
int mfd = open("/dev/mouse", O_RDONLY);
|
||
int amfd = open("/dev/absmouse", O_RDONLY);
|
||
if (amfd == -1) {
|
||
amfd = open("/dev/vmmouse", O_RDONLY);
|
||
vmmouse = 1;
|
||
}
|
||
|
||
key_event_state_t kbd_state = {0};
|
||
|
||
/* Prune any keyboard input we got before the terminal started. */
|
||
struct stat s;
|
||
fstat(kfd, &s);
|
||
for (int i = 0; i < s.st_size; i++) {
|
||
char tmp[1];
|
||
read(kfd, tmp, 1);
|
||
}
|
||
|
||
int fds[] = {fd_master, kfd, mfd, amfd};
|
||
|
||
unsigned char buf[1024];
|
||
while (!exit_application) {
|
||
|
||
int index = fswait2(amfd == -1 ? 3 : 4,fds,200);
|
||
|
||
check_for_exit();
|
||
|
||
if (input_stopped) continue;
|
||
|
||
if (index == 0) {
|
||
maybe_flip_cursor();
|
||
int r = read(fd_master, buf, 1024);
|
||
for (int i = 0; i < r; ++i) {
|
||
ansi_put(ansi_state, buf[i]);
|
||
}
|
||
} else if (index == 1) {
|
||
maybe_flip_cursor();
|
||
int r = read(kfd, &c, 1);
|
||
if (r > 0) {
|
||
int ret = kbd_scancode(&kbd_state, c, &event);
|
||
key_event(ret, &event);
|
||
}
|
||
} else if (index == 2) {
|
||
/* mouse event */
|
||
int r = read(mfd, (char *)&packet, sizeof(mouse_device_packet_t));
|
||
if (r > 0) {
|
||
last_mouse_buttons = packet.buttons;
|
||
handle_mouse(&packet);
|
||
}
|
||
} else if (amfd != -1 && index == 3) {
|
||
int r = read(amfd, (char *)&packet, sizeof(mouse_device_packet_t));
|
||
if (r > 0) {
|
||
if (!vmmouse) {
|
||
packet.buttons = last_mouse_buttons & 0xF;
|
||
} else {
|
||
last_mouse_buttons = packet.buttons;
|
||
}
|
||
handle_mouse_abs(&packet);
|
||
}
|
||
continue;
|
||
|
||
} else {
|
||
maybe_flip_cursor();
|
||
}
|
||
}
|
||
|
||
}
|
||
|
||
return 0;
|
||
}
|