From 5f1285238b09a5f01836138f5bb94654f78588a7 Mon Sep 17 00:00:00 2001 From: "Kartik K. Agaram" Date: Wed, 22 Apr 2015 17:15:19 -0700 Subject: [PATCH] 1136 - switch from ncurses to https://github.com/nsf/termbox --- cpp/070display | 63 ++-- cpp/display.mu | 5 - cpp/makefile | 8 +- cpp/termbox/COPYING | 19 ++ cpp/termbox/README | 2 + cpp/termbox/bytebuffer.inl | 78 +++++ cpp/termbox/input.inl | 132 +++++++ cpp/termbox/makefile | 7 + cpp/termbox/term.inl | 302 +++++++++++++++++ cpp/termbox/termbox.c | 679 +++++++++++++++++++++++++++++++++++++ cpp/termbox/termbox.h | 303 +++++++++++++++++ cpp/termbox/utf8.c | 79 +++++ 12 files changed, 1651 insertions(+), 26 deletions(-) create mode 100644 cpp/termbox/COPYING create mode 100644 cpp/termbox/README create mode 100644 cpp/termbox/bytebuffer.inl create mode 100644 cpp/termbox/input.inl create mode 100644 cpp/termbox/makefile create mode 100644 cpp/termbox/term.inl create mode 100644 cpp/termbox/termbox.c create mode 100644 cpp/termbox/termbox.h create mode 100644 cpp/termbox/utf8.c diff --git a/cpp/070display b/cpp/070display index a64aa5508..feb16fe12 100644 --- a/cpp/070display +++ b/cpp/070display @@ -1,21 +1,18 @@ -//: Text-mode cursor primitives. Currently thin wrappers around ncurses calls. -//: Mu starts out at the 'console' where lines wrap and scrolling is -//: automatic, where keys aren't read until pressing . -//: This file provides mechanisms for opening a 'display' and taking raw -//: charge of the cursor and keyboard. - -:(before "End Includes") -#include +//: Take charge of the text-mode display and keyboard. //:: Display management +:(before "End Globals") +size_t Display_row = 0, Display_column = 0; + :(before "End Primitive Recipe Declarations") SWITCH_TO_DISPLAY, :(before "End Primitive Recipe Numbers") Recipe_number["switch-to-display"] = SWITCH_TO_DISPLAY; :(before "End Primitive Recipe Implementations") case SWITCH_TO_DISPLAY: { - initscr(); + tb_init(); + Display_row = Display_column = 0; break; } @@ -25,7 +22,7 @@ RETURN_TO_CONSOLE, Recipe_number["return-to-console"] = RETURN_TO_CONSOLE; :(before "End Primitive Recipe Implementations") case RETURN_TO_CONSOLE: { - endwin(); + tb_shutdown(); break; } @@ -35,7 +32,8 @@ CLEAR_DISPLAY, Recipe_number["clear-display"] = CLEAR_DISPLAY; :(before "End Primitive Recipe Implementations") case CLEAR_DISPLAY: { - clear(); + tb_clear(); + Display_row = Display_column = 0; break; } @@ -45,7 +43,12 @@ CLEAR_LINE_ON_DISPLAY, Recipe_number["clear-line-on-display"] = CLEAR_LINE_ON_DISPLAY; :(before "End Primitive Recipe Implementations") case CLEAR_LINE_ON_DISPLAY: { - clrtoeol(); + size_t width = tb_width(); + for (size_t x = Display_column; x < width; ++x) { + tb_change_cell(x, Display_row, ' ', TB_WHITE, TB_DEFAULT); + } + tb_set_cursor(Display_column, Display_row); + tb_present(); break; } @@ -56,7 +59,24 @@ Recipe_number["print-character-to-display"] = PRINT_CHARACTER_TO_DISPLAY; :(before "End Primitive Recipe Implementations") case PRINT_CHARACTER_TO_DISPLAY: { vector arg = read_memory(instructions[pc].ingredients[0]); - addch(arg[0]); + int h=tb_height(), w=tb_width(); + size_t height = (h >= 0) ? h : 0; + size_t width = (w >= 0) ? w : 0; + if (arg[0] == '\n') { + if (Display_row < height) { + Display_column = 0; + ++Display_row; + tb_set_cursor(Display_column, Display_row); + tb_present(); + } + break; + } + tb_change_cell(Display_column, Display_row, arg[0], TB_WHITE, TB_DEFAULT); + if (Display_column < width) { + Display_column++; + tb_set_cursor(Display_column, Display_row); + } + tb_present(); break; } @@ -66,13 +86,11 @@ CURSOR_POSITION_ON_DISPLAY, Recipe_number["cursor-position-on-display"] = CURSOR_POSITION_ON_DISPLAY; :(before "End Primitive Recipe Implementations") case CURSOR_POSITION_ON_DISPLAY: { - size_t cursor_row = 0, cursor_column = 0; - getyx(stdscr, cursor_row, cursor_column); vector row; - row.push_back(cursor_row); + row.push_back(Display_row); write_memory(instructions[pc].products[0], row); vector column; - column.push_back(cursor_column); + column.push_back(Display_column); write_memory(instructions[pc].products[1], column); break; } @@ -85,7 +103,10 @@ Recipe_number["move-cursor-on-display"] = MOVE_CURSOR_ON_DISPLAY; case MOVE_CURSOR_ON_DISPLAY: { vector row = read_memory(instructions[pc].ingredients[0]); vector column = read_memory(instructions[pc].ingredients[1]); - move(row[0], column[0]); + Display_row = row[0]; + Display_column = column[0]; + tb_set_cursor(Display_column, Display_row); + tb_present(); break; } @@ -97,6 +118,10 @@ WAIT_FOR_KEY_FROM_KEYBOARD, Recipe_number["wait-for-key-from-keyboard"] = WAIT_FOR_KEY_FROM_KEYBOARD; :(before "End Primitive Recipe Implementations") case WAIT_FOR_KEY_FROM_KEYBOARD: { - getch(); + struct tb_event event; + tb_poll_event(&event); break; } + +:(before "End Includes") +#include"termbox/termbox.h" diff --git a/cpp/display.mu b/cpp/display.mu index fa5f3b85b..1b472e7ea 100644 --- a/cpp/display.mu +++ b/cpp/display.mu @@ -2,11 +2,6 @@ recipe main [ switch-to-display print-character-to-display 97:literal 1:integer/raw, 2:integer/raw <- cursor-position-on-display - $print 1:integer/raw - $print [, ] - $print 2:integer/raw - $print [ -] wait-for-key-from-keyboard clear-display move-cursor-on-display 0:literal, 4:literal diff --git a/cpp/makefile b/cpp/makefile index 5563cd8aa..a2c90f5c5 100644 --- a/cpp/makefile +++ b/cpp/makefile @@ -1,6 +1,6 @@ -mu: makefile enumerate/enumerate tangle/tangle mu.cc +mu: makefile enumerate/enumerate tangle/tangle mu.cc termbox/libtermbox.a @make autogenerated_lists >/dev/null - g++ -g -Wall -Wextra -fno-strict-aliasing mu.cc -lncurses -o mu + g++ -g -Wall -Wextra -fno-strict-aliasing mu.cc termbox/libtermbox.a -o mu # To see what the program looks like after all layers have been applied, read # mu.cc @@ -14,6 +14,9 @@ enumerate/enumerate: tangle/tangle: cd tangle && make && ./tangle test +termbox/libtermbox.a: + cd termbox && make + # auto-generated files; by convention they end in '_list'. .PHONY: autogenerated_lists test clena autogenerated_lists: mu.cc function_list test_list @@ -34,4 +37,5 @@ clena: clean clean: cd enumerate && make clean cd tangle && make clean + cd termbox && make clean rm -rf mu.cc core.mu mu *_list diff --git a/cpp/termbox/COPYING b/cpp/termbox/COPYING new file mode 100644 index 000000000..e9bb4eacd --- /dev/null +++ b/cpp/termbox/COPYING @@ -0,0 +1,19 @@ +Copyright (C) 2010-2013 nsf + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in +all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN +THE SOFTWARE. diff --git a/cpp/termbox/README b/cpp/termbox/README new file mode 100644 index 000000000..eccbee726 --- /dev/null +++ b/cpp/termbox/README @@ -0,0 +1,2 @@ +Fork of https://github.com/nsf/termbox as of 2015-04-22 +git hash 7c154d98a7d9207d768ee0a8e519ede74c0105cf diff --git a/cpp/termbox/bytebuffer.inl b/cpp/termbox/bytebuffer.inl new file mode 100644 index 000000000..c476742de --- /dev/null +++ b/cpp/termbox/bytebuffer.inl @@ -0,0 +1,78 @@ +struct bytebuffer { + char *buf; + int len; + int cap; +}; + +static void bytebuffer_reserve(struct bytebuffer *b, int cap) { + if (b->cap >= cap) { + return; + } + + // prefer doubling capacity + if (b->cap * 2 >= cap) { + cap = b->cap * 2; + } + + char *newbuf = malloc(cap); + if (b->len > 0) { + // copy what was there, b->len > 0 assumes b->buf != null + memcpy(newbuf, b->buf, b->len); + } + if (b->buf) { + // in case there was an allocated buffer, free it + free(b->buf); + } + b->buf = newbuf; + b->cap = cap; +} + +static void bytebuffer_init(struct bytebuffer *b, int cap) { + b->cap = 0; + b->len = 0; + b->buf = 0; + + if (cap > 0) { + b->cap = cap; + b->buf = malloc(cap); // just assume malloc works always + } +} + +static void bytebuffer_free(struct bytebuffer *b) { + if (b->buf) + free(b->buf); +} + +static void bytebuffer_clear(struct bytebuffer *b) { + b->len = 0; +} + +static void bytebuffer_append(struct bytebuffer *b, const char *data, int len) { + bytebuffer_reserve(b, b->len + len); + memcpy(b->buf + b->len, data, len); + b->len += len; +} + +static void bytebuffer_puts(struct bytebuffer *b, const char *str) { + bytebuffer_append(b, str, strlen(str)); +} + +static void bytebuffer_resize(struct bytebuffer *b, int len) { + bytebuffer_reserve(b, len); + b->len = len; +} + +static void bytebuffer_flush(struct bytebuffer *b, int fd) { + write(fd, b->buf, b->len); + bytebuffer_clear(b); +} + +static void bytebuffer_truncate(struct bytebuffer *b, int n) { + if (n <= 0) + return; + if (n > b->len) + n = b->len; + const int nmove = b->len - n; + memmove(b->buf, b->buf+n, nmove); + b->len -= n; +} diff --git a/cpp/termbox/input.inl b/cpp/termbox/input.inl new file mode 100644 index 000000000..8c5551140 --- /dev/null +++ b/cpp/termbox/input.inl @@ -0,0 +1,132 @@ +// if s1 starts with s2 returns true, else false +// len is the length of s1 +// s2 should be null-terminated +static bool starts_with(const char *s1, int len, const char *s2) +{ + int n = 0; + while (*s2 && n < len) { + if (*s1++ != *s2++) + return false; + n++; + } + return *s2 == 0; +} + +// convert escape sequence to event, and return consumed bytes on success (failure == 0) +static int parse_escape_seq(struct tb_event *event, const char *buf, int len) +{ + if (len >= 6 && starts_with(buf, len, "\033[M")) { + + switch (buf[3] & 3) { + case 0: + if (buf[3] == 0x60) + event->key = TB_KEY_MOUSE_WHEEL_UP; + else + event->key = TB_KEY_MOUSE_LEFT; + break; + case 1: + if (buf[3] == 0x61) + event->key = TB_KEY_MOUSE_WHEEL_DOWN; + else + event->key = TB_KEY_MOUSE_MIDDLE; + break; + case 2: + event->key = TB_KEY_MOUSE_RIGHT; + break; + case 3: + event->key = TB_KEY_MOUSE_RELEASE; + break; + default: + return -6; + } + event->type = TB_EVENT_MOUSE; // TB_EVENT_KEY by default + + // the coord is 1,1 for upper left + event->x = buf[4] - 1 - 32; + event->y = buf[5] - 1 - 32; + + return 6; + } + + // it's pretty simple here, find 'starts_with' match and return + // success, else return failure + int i; + for (i = 0; keys[i]; i++) { + if (starts_with(buf, len, keys[i])) { + event->ch = 0; + event->key = 0xFFFF-i; + return strlen(keys[i]); + } + } + return 0; +} + +static bool extract_event(struct tb_event *event, struct bytebuffer *inbuf, int inputmode) +{ + const char *buf = inbuf->buf; + const int len = inbuf->len; + if (len == 0) + return false; + + if (buf[0] == '\033') { + int n = parse_escape_seq(event, buf, len); + if (n != 0) { + bool success = true; + if (n < 0) { + success = false; + n = -n; + } + bytebuffer_truncate(inbuf, n); + return success; + } else { + // it's not escape sequence, then it's ALT or ESC, + // check inputmode + if (inputmode&TB_INPUT_ESC) { + // if we're in escape mode, fill ESC event, pop + // buffer, return success + event->ch = 0; + event->key = TB_KEY_ESC; + event->mod = 0; + bytebuffer_truncate(inbuf, 1); + return true; + } + if (inputmode&TB_INPUT_ALT) { + // if we're in alt mode, set ALT modifier to + // event and redo parsing + event->mod = TB_MOD_ALT; + bytebuffer_truncate(inbuf, 1); + return extract_event(event, inbuf, inputmode); + } + assert(!"never got here"); + } + } + + // if we're here, this is not an escape sequence and not an alt sequence + // so, it's a FUNCTIONAL KEY or a UNICODE character + + // first of all check if it's a functional key + if ((unsigned char)buf[0] <= TB_KEY_SPACE || + (unsigned char)buf[0] == TB_KEY_BACKSPACE2) + { + // fill event, pop buffer, return success */ + event->ch = 0; + event->key = (uint16_t)buf[0]; + bytebuffer_truncate(inbuf, 1); + return true; + } + + // feh... we got utf8 here + + // check if there is all bytes + if (len >= tb_utf8_char_length(buf[0])) { + /* everything ok, fill event, pop buffer, return success */ + tb_utf8_char_to_unicode(&event->ch, buf); + event->key = 0; + bytebuffer_truncate(inbuf, tb_utf8_char_length(buf[0])); + return true; + } + + // event isn't recognized, perhaps there is not enough bytes in utf8 + // sequence + return false; +} diff --git a/cpp/termbox/makefile b/cpp/termbox/makefile new file mode 100644 index 000000000..58d76b211 --- /dev/null +++ b/cpp/termbox/makefile @@ -0,0 +1,7 @@ +CFLAGS=-O3 -Wall -Wextra -D_XOPEN_SOURCE + +libtermbox.a: utf8.o termbox.o + ar rcs libtermbox.a *.o + +clean: + rm *.o libtermbox.a diff --git a/cpp/termbox/term.inl b/cpp/termbox/term.inl new file mode 100644 index 000000000..80812b40f --- /dev/null +++ b/cpp/termbox/term.inl @@ -0,0 +1,302 @@ +enum { + T_ENTER_CA, + T_EXIT_CA, + T_SHOW_CURSOR, + T_HIDE_CURSOR, + T_CLEAR_SCREEN, + T_SGR0, + T_UNDERLINE, + T_BOLD, + T_BLINK, + T_REVERSE, + T_ENTER_KEYPAD, + T_EXIT_KEYPAD, + T_ENTER_MOUSE, + T_EXIT_MOUSE, + T_FUNCS_NUM, +}; + +#define EUNSUPPORTED_TERM -1 + +// rxvt-256color +static const char *rxvt_256color_keys[] = { + "\033[11~","\033[12~","\033[13~","\033[14~","\033[15~","\033[17~","\033[18~","\033[19~","\033[20~","\033[21~","\033[23~","\033[24~","\033[2~","\033[3~","\033[7~","\033[8~","\033[5~","\033[6~","\033[A","\033[B","\033[D","\033[C", 0 +}; +static const char *rxvt_256color_funcs[] = { + "\0337\033[?47h", "\033[2J\033[?47l\0338", "\033[?25h", "\033[?25l", "\033[H\033[2J", "\033[m", "\033[4m", "\033[1m", "\033[5m", "\033[7m", "\033=", "\033>", "\033[?1000h", "\033[?1000l", +}; + +// Eterm +static const char *eterm_keys[] = { + "\033[11~","\033[12~","\033[13~","\033[14~","\033[15~","\033[17~","\033[18~","\033[19~","\033[20~","\033[21~","\033[23~","\033[24~","\033[2~","\033[3~","\033[7~","\033[8~","\033[5~","\033[6~","\033[A","\033[B","\033[D","\033[C", 0 +}; +static const char *eterm_funcs[] = { + "\0337\033[?47h", "\033[2J\033[?47l\0338", "\033[?25h", "\033[?25l", "\033[H\033[2J", "\033[m", "\033[4m", "\033[1m", "\033[5m", "\033[7m", "", "", "", "", +}; + +// screen +static const char *screen_keys[] = { + "\033OP","\033OQ","\033OR","\033OS","\033[15~","\033[17~","\033[18~","\033[19~","\033[20~","\033[21~","\033[23~","\033[24~","\033[2~","\033[3~","\033[1~","\033[4~","\033[5~","\033[6~","\033OA","\033OB","\033OD","\033OC", 0 +}; +static const char *screen_funcs[] = { + "\033[?1049h", "\033[?1049l", "\033[34h\033[?25h", "\033[?25l", "\033[H\033[J", "\033[m", "\033[4m", "\033[1m", "\033[5m", "\033[7m", "\033[?1h\033=", "\033[?1l\033>", "\033[?1000h", "\033[?1000l", +}; + +// rxvt-unicode +static const char *rxvt_unicode_keys[] = { + "\033[11~","\033[12~","\033[13~","\033[14~","\033[15~","\033[17~","\033[18~","\033[19~","\033[20~","\033[21~","\033[23~","\033[24~","\033[2~","\033[3~","\033[7~","\033[8~","\033[5~","\033[6~","\033[A","\033[B","\033[D","\033[C", 0 +}; +static const char *rxvt_unicode_funcs[] = { + "\033[?1049h", "\033[r\033[?1049l", "\033[?25h", "\033[?25l", "\033[H\033[2J", "\033[m\033(B", "\033[4m", "\033[1m", "\033[5m", "\033[7m", "\033=", "\033>", "\033[?1000h", "\033[?1000l", +}; + +// linux +static const char *linux_keys[] = { + "\033[[A","\033[[B","\033[[C","\033[[D","\033[[E","\033[17~","\033[18~","\033[19~","\033[20~","\033[21~","\033[23~","\033[24~","\033[2~","\033[3~","\033[1~","\033[4~","\033[5~","\033[6~","\033[A","\033[B","\033[D","\033[C", 0 +}; +static const char *linux_funcs[] = { + "", "", "\033[?25h\033[?0c", "\033[?25l\033[?1c", "\033[H\033[J", "\033[0;10m", "\033[4m", "\033[1m", "\033[5m", "\033[7m", "", "", "", "", +}; + +// xterm +static const char *xterm_keys[] = { + "\033OP","\033OQ","\033OR","\033OS","\033[15~","\033[17~","\033[18~","\033[19~","\033[20~","\033[21~","\033[23~","\033[24~","\033[2~","\033[3~","\033OH","\033OF","\033[5~","\033[6~","\033OA","\033OB","\033OD","\033OC", 0 +}; +static const char *xterm_funcs[] = { + "\033[?1049h", "\033[?1049l", "\033[?12l\033[?25h", "\033[?25l", "\033[H\033[2J", "\033(B\033[m", "\033[4m", "\033[1m", "\033[5m", "\033[7m", "\033[?1h\033=", "\033[?1l\033>", "\033[?1000h", "\033[?1000l", +}; + +static struct term { + const char *name; + const char **keys; + const char **funcs; +} terms[] = { + {"rxvt-256color", rxvt_256color_keys, rxvt_256color_funcs}, + {"Eterm", eterm_keys, eterm_funcs}, + {"screen", screen_keys, screen_funcs}, + {"rxvt-unicode", rxvt_unicode_keys, rxvt_unicode_funcs}, + {"linux", linux_keys, linux_funcs}, + {"xterm", xterm_keys, xterm_funcs}, + {0, 0, 0}, +}; + +static bool init_from_terminfo = false; +static const char **keys; +static const char **funcs; + +static int try_compatible(const char *term, const char *name, + const char **tkeys, const char **tfuncs) +{ + if (strstr(term, name)) { + keys = tkeys; + funcs = tfuncs; + return 0; + } + + return EUNSUPPORTED_TERM; +} + +static int init_term_builtin(void) +{ + int i; + const char *term = getenv("TERM"); + + if (term) { + for (i = 0; terms[i].name; i++) { + if (!strcmp(terms[i].name, term)) { + keys = terms[i].keys; + funcs = terms[i].funcs; + return 0; + } + } + + /* let's do some heuristic, maybe it's a compatible terminal */ + if (try_compatible(term, "xterm", xterm_keys, xterm_funcs) == 0) + return 0; + if (try_compatible(term, "rxvt", rxvt_unicode_keys, rxvt_unicode_funcs) == 0) + return 0; + if (try_compatible(term, "linux", linux_keys, linux_funcs) == 0) + return 0; + if (try_compatible(term, "Eterm", eterm_keys, eterm_funcs) == 0) + return 0; + if (try_compatible(term, "screen", screen_keys, screen_funcs) == 0) + return 0; + /* let's assume that 'cygwin' is xterm compatible */ + if (try_compatible(term, "cygwin", xterm_keys, xterm_funcs) == 0) + return 0; + } + + return EUNSUPPORTED_TERM; +} + +//---------------------------------------------------------------------- +// terminfo +//---------------------------------------------------------------------- + +static char *read_file(const char *file) { + FILE *f = fopen(file, "rb"); + if (!f) + return 0; + + struct stat st; + if (fstat(fileno(f), &st) != 0) { + fclose(f); + return 0; + } + + char *data = malloc(st.st_size); + if (!data) { + fclose(f); + return 0; + } + + if (fread(data, 1, st.st_size, f) != (size_t)st.st_size) { + fclose(f); + free(data); + return 0; + } + + fclose(f); + return data; +} + +static char *terminfo_try_path(const char *path, const char *term) { + char tmp[4096]; + snprintf(tmp, sizeof(tmp), "%s/%c/%s", path, term[0], term); + tmp[sizeof(tmp)-1] = '\0'; + char *data = read_file(tmp); + if (data) { + return data; + } + + // fallback to darwin specific dirs structure + snprintf(tmp, sizeof(tmp), "%s/%x/%s", path, term[0], term); + tmp[sizeof(tmp)-1] = '\0'; + return read_file(tmp); +} + +static char *load_terminfo(void) { + char tmp[4096]; + const char *term = getenv("TERM"); + if (!term) { + return 0; + } + + // if TERMINFO is set, no other directory should be searched + const char *terminfo = getenv("TERMINFO"); + if (terminfo) { + return terminfo_try_path(terminfo, term); + } + + // next, consider ~/.terminfo + const char *home = getenv("HOME"); + if (home) { + snprintf(tmp, sizeof(tmp), "%s/.terminfo", home); + tmp[sizeof(tmp)-1] = '\0'; + char *data = terminfo_try_path(tmp, term); + if (data) + return data; + } + + // next, TERMINFO_DIRS + const char *dirs = getenv("TERMINFO_DIRS"); + if (dirs) { + snprintf(tmp, sizeof(tmp), "%s", dirs); + tmp[sizeof(tmp)-1] = '\0'; + char *dir = strtok(tmp, ":"); + while (dir) { + const char *cdir = dir; + if (strcmp(cdir, "") == 0) { + cdir = "/usr/share/terminfo"; + } + char *data = terminfo_try_path(cdir, term); + if (data) + return data; + dir = strtok(0, ":"); + } + } + + // fallback to /usr/share/terminfo + return terminfo_try_path("/usr/share/terminfo", term); +} + +#define TI_MAGIC 0432 +#define TI_HEADER_LENGTH 12 +#define TB_KEYS_NUM 22 + +static const char *terminfo_copy_string(char *data, int str, int table) { + const int16_t off = *(int16_t*)(data + str); + const char *src = data + table + off; + int len = strlen(src); + char *dst = malloc(len+1); + strcpy(dst, src); + return dst; +} + +static const int16_t ti_funcs[] = { + 28, 40, 16, 13, 5, 39, 36, 27, 26, 34, 89, 88, +}; + +static const int16_t ti_keys[] = { + 66, 68 /* apparently not a typo; 67 is F10 for whatever reason */, 69, + 70, 71, 72, 73, 74, 75, 67, 216, 217, 77, 59, 76, 164, 82, 81, 87, 61, + 79, 83, +}; + +static int init_term(void) { + int i; + char *data = load_terminfo(); + if (!data) { + init_from_terminfo = false; + return init_term_builtin(); + } + + int16_t *header = (int16_t*)data; + if ((header[1] + header[2]) % 2) { + // old quirk to align everything on word boundaries + header[2] += 1; + } + + const int str_offset = TI_HEADER_LENGTH + + header[1] + header[2] + 2 * header[3]; + const int table_offset = str_offset + 2 * header[4]; + + keys = malloc(sizeof(const char*) * (TB_KEYS_NUM+1)); + for (i = 0; i < TB_KEYS_NUM; i++) { + keys[i] = terminfo_copy_string(data, + str_offset + 2 * ti_keys[i], table_offset); + } + keys[TB_KEYS_NUM] = 0; + + funcs = malloc(sizeof(const char*) * T_FUNCS_NUM); + // the last two entries are reserved for mouse. because the table offset is + // not there, the two entries have to fill in manually + for (i = 0; i < T_FUNCS_NUM-2; i++) { + funcs[i] = terminfo_copy_string(data, + str_offset + 2 * ti_funcs[i], table_offset); + } + + funcs[T_FUNCS_NUM-2] = "\033[?1000h"; + funcs[T_FUNCS_NUM-1] = "\033[?1000l"; + + init_from_terminfo = true; + free(data); + return 0; +} + +static void shutdown_term(void) { + if (init_from_terminfo) { + int i; + for (i = 0; i < TB_KEYS_NUM; i++) { + free((void*)keys[i]); + } + // the last two entries are reserved for mouse. because the table offset + // is not there, the two entries have to fill in manually and do not + // need to be freed. + for (i = 0; i < T_FUNCS_NUM-2; i++) { + free((void*)funcs[i]); + } + free(keys); + free(funcs); + } +} diff --git a/cpp/termbox/termbox.c b/cpp/termbox/termbox.c new file mode 100644 index 000000000..c9a7ae5e2 --- /dev/null +++ b/cpp/termbox/termbox.c @@ -0,0 +1,679 @@ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "termbox.h" + +#include "bytebuffer.inl" +#include "term.inl" +#include "input.inl" + +struct cellbuf { + int width; + int height; + struct tb_cell *cells; +}; + +#define CELL(buf, x, y) (buf)->cells[(y) * (buf)->width + (x)] +#define IS_CURSOR_HIDDEN(cx, cy) (cx == -1 || cy == -1) +#define LAST_COORD_INIT -1 + +static struct termios orig_tios; + +static struct cellbuf back_buffer; +static struct cellbuf front_buffer; +static struct bytebuffer output_buffer; +static struct bytebuffer input_buffer; + +static int termw = -1; +static int termh = -1; + +static int inputmode = TB_INPUT_ESC; +static int outputmode = TB_OUTPUT_NORMAL; + +static int inout; +static int winch_fds[2]; + +static int lastx = LAST_COORD_INIT; +static int lasty = LAST_COORD_INIT; +static int cursor_x = -1; +static int cursor_y = -1; + +static uint16_t background = TB_DEFAULT; +static uint16_t foreground = TB_DEFAULT; + +static void write_cursor(int x, int y); +static void write_sgr_fg(uint16_t fg); +static void write_sgr_bg(uint16_t bg); +static void write_sgr(uint16_t fg, uint16_t bg); + +static void cellbuf_init(struct cellbuf *buf, int width, int height); +static void cellbuf_resize(struct cellbuf *buf, int width, int height); +static void cellbuf_clear(struct cellbuf *buf); +static void cellbuf_free(struct cellbuf *buf); + +static void update_size(void); +static void update_term_size(void); +static void send_attr(uint16_t fg, uint16_t bg); +static void send_char(int x, int y, uint32_t c); +static void send_clear(void); +static void sigwinch_handler(int xxx); +static int wait_fill_event(struct tb_event *event, struct timeval *timeout); + +/* may happen in a different thread */ +static volatile int buffer_size_change_request; + +/* -------------------------------------------------------- */ + +int tb_init(void) +{ + inout = open("/dev/tty", O_RDWR); + if (inout == -1) { + return TB_EFAILED_TO_OPEN_TTY; + } + + if (init_term() < 0) { + close(inout); + return TB_EUNSUPPORTED_TERMINAL; + } + + if (pipe(winch_fds) < 0) { + close(inout); + return TB_EPIPE_TRAP_ERROR; + } + + struct sigaction sa; + memset(&sa, 0, sizeof(sa)); + sa.sa_handler = sigwinch_handler; + sa.sa_flags = 0; + sigaction(SIGWINCH, &sa, 0); + + tcgetattr(inout, &orig_tios); + + struct termios tios; + memcpy(&tios, &orig_tios, sizeof(tios)); + + tios.c_iflag &= ~(IGNBRK | BRKINT | PARMRK | ISTRIP + | INLCR | IGNCR | ICRNL | IXON); + tios.c_oflag &= ~OPOST; + tios.c_lflag &= ~(ECHO | ECHONL | ICANON | ISIG | IEXTEN); + tios.c_cflag &= ~(CSIZE | PARENB); + tios.c_cflag |= CS8; + tios.c_cc[VMIN] = 0; + tios.c_cc[VTIME] = 0; + tcsetattr(inout, TCSAFLUSH, &tios); + + bytebuffer_init(&input_buffer, 128); + bytebuffer_init(&output_buffer, 32 * 1024); + + bytebuffer_puts(&output_buffer, funcs[T_ENTER_CA]); + bytebuffer_puts(&output_buffer, funcs[T_ENTER_KEYPAD]); + bytebuffer_puts(&output_buffer, funcs[T_HIDE_CURSOR]); + send_clear(); + + update_term_size(); + cellbuf_init(&back_buffer, termw, termh); + cellbuf_init(&front_buffer, termw, termh); + cellbuf_clear(&back_buffer); + cellbuf_clear(&front_buffer); + + return 0; +} + +void tb_shutdown(void) +{ + if (termw == -1) { + fputs("tb_shutdown() should not be called twice.", stderr); + abort(); + } + + bytebuffer_puts(&output_buffer, funcs[T_SHOW_CURSOR]); + bytebuffer_puts(&output_buffer, funcs[T_SGR0]); + bytebuffer_puts(&output_buffer, funcs[T_CLEAR_SCREEN]); + bytebuffer_puts(&output_buffer, funcs[T_EXIT_CA]); + bytebuffer_puts(&output_buffer, funcs[T_EXIT_KEYPAD]); + bytebuffer_puts(&output_buffer, funcs[T_EXIT_MOUSE]); + bytebuffer_flush(&output_buffer, inout); + tcsetattr(inout, TCSAFLUSH, &orig_tios); + + shutdown_term(); + close(inout); + close(winch_fds[0]); + close(winch_fds[1]); + + cellbuf_free(&back_buffer); + cellbuf_free(&front_buffer); + bytebuffer_free(&output_buffer); + bytebuffer_free(&input_buffer); + termw = termh = -1; +} + +void tb_present(void) +{ + int x,y,w,i; + struct tb_cell *back, *front; + + /* invalidate cursor position */ + lastx = LAST_COORD_INIT; + lasty = LAST_COORD_INIT; + + if (buffer_size_change_request) { + update_size(); + buffer_size_change_request = 0; + } + + for (y = 0; y < front_buffer.height; ++y) { + for (x = 0; x < front_buffer.width; ) { + back = &CELL(&back_buffer, x, y); + front = &CELL(&front_buffer, x, y); + w = wcwidth(back->ch); + if (w < 1) w = 1; + if (memcmp(back, front, sizeof(struct tb_cell)) == 0) { + x += w; + continue; + } + memcpy(front, back, sizeof(struct tb_cell)); + send_attr(back->fg, back->bg); + if (w > 1 && x >= front_buffer.width - (w - 1)) { + // Not enough room for wide ch, so send spaces + for (i = x; i < front_buffer.width; ++i) { + send_char(i, y, ' '); + } + } else { + send_char(x, y, back->ch); + for (i = 1; i < w; ++i) { + front = &CELL(&front_buffer, x + i, y); + front->ch = 0; + front->fg = back->fg; + front->bg = back->bg; + } + } + x += w; + } + } + if (!IS_CURSOR_HIDDEN(cursor_x, cursor_y)) + write_cursor(cursor_x, cursor_y); + bytebuffer_flush(&output_buffer, inout); +} + +void tb_set_cursor(int cx, int cy) +{ + if (IS_CURSOR_HIDDEN(cursor_x, cursor_y) && !IS_CURSOR_HIDDEN(cx, cy)) + bytebuffer_puts(&output_buffer, funcs[T_SHOW_CURSOR]); + + if (!IS_CURSOR_HIDDEN(cursor_x, cursor_y) && IS_CURSOR_HIDDEN(cx, cy)) + bytebuffer_puts(&output_buffer, funcs[T_HIDE_CURSOR]); + + cursor_x = cx; + cursor_y = cy; + if (!IS_CURSOR_HIDDEN(cursor_x, cursor_y)) + write_cursor(cursor_x, cursor_y); +} + +void tb_put_cell(int x, int y, const struct tb_cell *cell) +{ + if ((unsigned)x >= (unsigned)back_buffer.width) + return; + if ((unsigned)y >= (unsigned)back_buffer.height) + return; + CELL(&back_buffer, x, y) = *cell; +} + +void tb_change_cell(int x, int y, uint32_t ch, uint16_t fg, uint16_t bg) +{ + struct tb_cell c = {ch, fg, bg}; + tb_put_cell(x, y, &c); +} + +void tb_blit(int x, int y, int w, int h, const struct tb_cell *cells) +{ + if (x + w < 0 || x >= back_buffer.width) + return; + if (y + h < 0 || y >= back_buffer.height) + return; + int xo = 0, yo = 0, ww = w, hh = h; + if (x < 0) { + xo = -x; + ww -= xo; + x = 0; + } + if (y < 0) { + yo = -y; + hh -= yo; + y = 0; + } + if (ww > back_buffer.width - x) + ww = back_buffer.width - x; + if (hh > back_buffer.height - y) + hh = back_buffer.height - y; + + int sy; + struct tb_cell *dst = &CELL(&back_buffer, x, y); + const struct tb_cell *src = cells + yo * w + xo; + size_t size = sizeof(struct tb_cell) * ww; + + for (sy = 0; sy < hh; ++sy) { + memcpy(dst, src, size); + dst += back_buffer.width; + src += w; + } +} + +struct tb_cell *tb_cell_buffer() +{ + return back_buffer.cells; +} + +int tb_poll_event(struct tb_event *event) +{ + return wait_fill_event(event, 0); +} + +int tb_peek_event(struct tb_event *event, int timeout) +{ + struct timeval tv; + tv.tv_sec = timeout / 1000; + tv.tv_usec = (timeout - (tv.tv_sec * 1000)) * 1000; + return wait_fill_event(event, &tv); +} + +int tb_width(void) +{ + return termw; +} + +int tb_height(void) +{ + return termh; +} + +void tb_clear(void) +{ + if (buffer_size_change_request) { + update_size(); + buffer_size_change_request = 0; + } + cellbuf_clear(&back_buffer); +} + +int tb_select_input_mode(int mode) +{ + if (mode) { + inputmode = mode; + if (mode&TB_INPUT_MOUSE) { + bytebuffer_puts(&output_buffer, funcs[T_ENTER_MOUSE]); + bytebuffer_flush(&output_buffer, inout); + } else { + bytebuffer_puts(&output_buffer, funcs[T_EXIT_MOUSE]); + bytebuffer_flush(&output_buffer, inout); + } + } + return inputmode; +} + +int tb_select_output_mode(int mode) +{ + if (mode) + outputmode = mode; + return outputmode; +} + +void tb_set_clear_attributes(uint16_t fg, uint16_t bg) +{ + foreground = fg; + background = bg; +} + +/* -------------------------------------------------------- */ + +static int convertnum(uint32_t num, char* buf) { + int i, l = 0; + int ch; + do { + buf[l++] = '0' + (num % 10); + num /= 10; + } while (num); + for(i = 0; i < l / 2; i++) { + ch = buf[i]; + buf[i] = buf[l - 1 - i]; + buf[l - 1 - i] = ch; + } + return l; +} + +#define WRITE_LITERAL(X) bytebuffer_append(&output_buffer, (X), sizeof(X)-1) +#define WRITE_INT(X) bytebuffer_append(&output_buffer, buf, convertnum((X), buf)) + +static void write_cursor(int x, int y) { + char buf[32]; + WRITE_LITERAL("\033["); + WRITE_INT(y+1); + WRITE_LITERAL(";"); + WRITE_INT(x+1); + WRITE_LITERAL("H"); +} + +// can only be called in NORMAL output mode +static void write_sgr_fg(uint16_t fg) { + char buf[32]; + + WRITE_LITERAL("\033[3"); + WRITE_INT(fg-1); + WRITE_LITERAL("m"); +} + +// can only be called in NORMAL output mode +static void write_sgr_bg(uint16_t bg) { + char buf[32]; + + WRITE_LITERAL("\033[4"); + WRITE_INT(bg-1); + WRITE_LITERAL("m"); +} + +static void write_sgr(uint16_t fg, uint16_t bg) { + char buf[32]; + + switch (outputmode) { + case TB_OUTPUT_256: + case TB_OUTPUT_216: + case TB_OUTPUT_GRAYSCALE: + WRITE_LITERAL("\033[38;5;"); + WRITE_INT(fg); + WRITE_LITERAL("m"); + WRITE_LITERAL("\033[48;5;"); + WRITE_INT(bg); + WRITE_LITERAL("m"); + break; + case TB_OUTPUT_NORMAL: + default: + WRITE_LITERAL("\033[3"); + WRITE_INT(fg-1); + WRITE_LITERAL(";4"); + WRITE_INT(bg-1); + WRITE_LITERAL("m"); + } +} + +static void cellbuf_init(struct cellbuf *buf, int width, int height) +{ + buf->cells = (struct tb_cell*)malloc(sizeof(struct tb_cell) * width * height); + assert(buf->cells); + buf->width = width; + buf->height = height; +} + +static void cellbuf_resize(struct cellbuf *buf, int width, int height) +{ + if (buf->width == width && buf->height == height) + return; + + int oldw = buf->width; + int oldh = buf->height; + struct tb_cell *oldcells = buf->cells; + + cellbuf_init(buf, width, height); + cellbuf_clear(buf); + + int minw = (width < oldw) ? width : oldw; + int minh = (height < oldh) ? height : oldh; + int i; + + for (i = 0; i < minh; ++i) { + struct tb_cell *csrc = oldcells + (i * oldw); + struct tb_cell *cdst = buf->cells + (i * width); + memcpy(cdst, csrc, sizeof(struct tb_cell) * minw); + } + + free(oldcells); +} + +static void cellbuf_clear(struct cellbuf *buf) +{ + int i; + int ncells = buf->width * buf->height; + + for (i = 0; i < ncells; ++i) { + buf->cells[i].ch = ' '; + buf->cells[i].fg = foreground; + buf->cells[i].bg = background; + } +} + +static void cellbuf_free(struct cellbuf *buf) +{ + free(buf->cells); +} + +static void get_term_size(int *w, int *h) +{ + struct winsize sz; + memset(&sz, 0, sizeof(sz)); + + ioctl(inout, TIOCGWINSZ, &sz); + + if (w) *w = sz.ws_col; + if (h) *h = sz.ws_row; +} + +static void update_term_size(void) +{ + struct winsize sz; + memset(&sz, 0, sizeof(sz)); + + ioctl(inout, TIOCGWINSZ, &sz); + + termw = sz.ws_col; + termh = sz.ws_row; +} + +static void send_attr(uint16_t fg, uint16_t bg) +{ +#define LAST_ATTR_INIT 0xFFFF + static uint16_t lastfg = LAST_ATTR_INIT, lastbg = LAST_ATTR_INIT; + if (fg != lastfg || bg != lastbg) { + bytebuffer_puts(&output_buffer, funcs[T_SGR0]); + + uint16_t fgcol; + uint16_t bgcol; + + switch (outputmode) { + case TB_OUTPUT_256: + fgcol = fg & 0xFF; + bgcol = bg & 0xFF; + break; + + case TB_OUTPUT_216: + fgcol = fg & 0xFF; if (fgcol > 215) fgcol = 7; + bgcol = bg & 0xFF; if (bgcol > 215) bgcol = 0; + fgcol += 0x10; + bgcol += 0x10; + break; + + case TB_OUTPUT_GRAYSCALE: + fgcol = fg & 0xFF; if (fgcol > 23) fgcol = 23; + bgcol = bg & 0xFF; if (bgcol > 23) bgcol = 0; + fgcol += 0xe8; + bgcol += 0xe8; + break; + + case TB_OUTPUT_NORMAL: + default: + fgcol = fg & 0x0F; + bgcol = bg & 0x0F; + } + + if (fg & TB_BOLD) + bytebuffer_puts(&output_buffer, funcs[T_BOLD]); + if (bg & TB_BOLD) + bytebuffer_puts(&output_buffer, funcs[T_BLINK]); + if (fg & TB_UNDERLINE) + bytebuffer_puts(&output_buffer, funcs[T_UNDERLINE]); + if ((fg & TB_REVERSE) || (bg & TB_REVERSE)) + bytebuffer_puts(&output_buffer, funcs[T_REVERSE]); + + switch (outputmode) { + case TB_OUTPUT_256: + case TB_OUTPUT_216: + case TB_OUTPUT_GRAYSCALE: + write_sgr(fgcol, bgcol); + break; + + case TB_OUTPUT_NORMAL: + default: + if (fgcol != TB_DEFAULT) { + if (bgcol != TB_DEFAULT) + write_sgr(fgcol, bgcol); + else + write_sgr_fg(fgcol); + } else if (bgcol != TB_DEFAULT) { + write_sgr_bg(bgcol); + } + } + + lastfg = fg; + lastbg = bg; + } +} + +static void send_char(int x, int y, uint32_t c) +{ + char buf[7]; + int bw = tb_utf8_unicode_to_char(buf, c); + buf[bw] = '\0'; + if (x-1 != lastx || y != lasty) + write_cursor(x, y); + lastx = x; lasty = y; + if(!c) buf[0] = ' '; // replace 0 with whitespace + bytebuffer_puts(&output_buffer, buf); +} + +static void send_clear(void) +{ + send_attr(foreground, background); + bytebuffer_puts(&output_buffer, funcs[T_CLEAR_SCREEN]); + if (!IS_CURSOR_HIDDEN(cursor_x, cursor_y)) + write_cursor(cursor_x, cursor_y); + bytebuffer_flush(&output_buffer, inout); + + /* we need to invalidate cursor position too and these two vars are + * used only for simple cursor positioning optimization, cursor + * actually may be in the correct place, but we simply discard + * optimization once and it gives us simple solution for the case when + * cursor moved */ + lastx = LAST_COORD_INIT; + lasty = LAST_COORD_INIT; +} + +static void sigwinch_handler(int xxx) +{ + (void) xxx; + const int zzz = 1; + write(winch_fds[1], &zzz, sizeof(int)); +} + +static void update_size(void) +{ + update_term_size(); + cellbuf_resize(&back_buffer, termw, termh); + cellbuf_resize(&front_buffer, termw, termh); + cellbuf_clear(&front_buffer); + send_clear(); +} + +static int read_up_to(int n) { + assert(n > 0); + const int prevlen = input_buffer.len; + bytebuffer_resize(&input_buffer, prevlen + n); + + int read_n = 0; + while (read_n <= n) { + ssize_t r = 0; + if (read_n < n) { + r = read(inout, input_buffer.buf + prevlen + read_n, n - read_n); + } +#ifdef __CYGWIN__ + // While linux man for tty says when VMIN == 0 && VTIME == 0, read + // should return 0 when there is nothing to read, cygwin's read returns + // -1. Not sure why and if it's correct to ignore it, but let's pretend + // it's zero. + if (r < 0) r = 0; +#endif + if (r < 0) { + // EAGAIN / EWOULDBLOCK shouldn't occur here + assert(errno != EAGAIN && errno != EWOULDBLOCK); + return -1; + } else if (r > 0) { + read_n += r; + } else { + bytebuffer_resize(&input_buffer, prevlen + read_n); + return read_n; + } + } + assert(!"unreachable"); + return 0; +} + +static int wait_fill_event(struct tb_event *event, struct timeval *timeout) +{ + // ;-) +#define ENOUGH_DATA_FOR_PARSING 64 + fd_set events; + memset(event, 0, sizeof(struct tb_event)); + + // try to extract event from input buffer, return on success + event->type = TB_EVENT_KEY; + if (extract_event(event, &input_buffer, inputmode)) + return event->type; + + // it looks like input buffer is incomplete, let's try the short path, + // but first make sure there is enough space + int n = read_up_to(ENOUGH_DATA_FOR_PARSING); + if (n < 0) + return -1; + if (n > 0 && extract_event(event, &input_buffer, inputmode)) + return event->type; + + // n == 0, or not enough data, let's go to select + while (1) { + FD_ZERO(&events); + FD_SET(inout, &events); + FD_SET(winch_fds[0], &events); + int maxfd = (winch_fds[0] > inout) ? winch_fds[0] : inout; + int result = select(maxfd+1, &events, 0, 0, timeout); + if (!result) + return 0; + + if (FD_ISSET(inout, &events)) { + event->type = TB_EVENT_KEY; + n = read_up_to(ENOUGH_DATA_FOR_PARSING); + if (n < 0) + return -1; + + if (n == 0) + continue; + + if (extract_event(event, &input_buffer, inputmode)) + return event->type; + } + if (FD_ISSET(winch_fds[0], &events)) { + event->type = TB_EVENT_RESIZE; + int zzz = 0; + read(winch_fds[0], &zzz, sizeof(int)); + buffer_size_change_request = 1; + get_term_size(&event->w, &event->h); + return TB_EVENT_RESIZE; + } + } +} diff --git a/cpp/termbox/termbox.h b/cpp/termbox/termbox.h new file mode 100644 index 000000000..85a8cf12e --- /dev/null +++ b/cpp/termbox/termbox.h @@ -0,0 +1,303 @@ +#pragma once + +#include + +/* for shared objects */ +#if __GNUC__ >= 4 + #define SO_IMPORT __attribute__((visibility("default"))) +#else + #define SO_IMPORT +#endif + +#ifdef __cplusplus +extern "C" { +#endif + +/* Key constants. See also struct tb_event's key field. + * + * These are a safe subset of terminfo keys, which exist on all popular + * terminals. Termbox uses only them to stay truly portable. + */ +#define TB_KEY_F1 (0xFFFF-0) +#define TB_KEY_F2 (0xFFFF-1) +#define TB_KEY_F3 (0xFFFF-2) +#define TB_KEY_F4 (0xFFFF-3) +#define TB_KEY_F5 (0xFFFF-4) +#define TB_KEY_F6 (0xFFFF-5) +#define TB_KEY_F7 (0xFFFF-6) +#define TB_KEY_F8 (0xFFFF-7) +#define TB_KEY_F9 (0xFFFF-8) +#define TB_KEY_F10 (0xFFFF-9) +#define TB_KEY_F11 (0xFFFF-10) +#define TB_KEY_F12 (0xFFFF-11) +#define TB_KEY_INSERT (0xFFFF-12) +#define TB_KEY_DELETE (0xFFFF-13) +#define TB_KEY_HOME (0xFFFF-14) +#define TB_KEY_END (0xFFFF-15) +#define TB_KEY_PGUP (0xFFFF-16) +#define TB_KEY_PGDN (0xFFFF-17) +#define TB_KEY_ARROW_UP (0xFFFF-18) +#define TB_KEY_ARROW_DOWN (0xFFFF-19) +#define TB_KEY_ARROW_LEFT (0xFFFF-20) +#define TB_KEY_ARROW_RIGHT (0xFFFF-21) +#define TB_KEY_MOUSE_LEFT (0xFFFF-22) +#define TB_KEY_MOUSE_RIGHT (0xFFFF-23) +#define TB_KEY_MOUSE_MIDDLE (0xFFFF-24) +#define TB_KEY_MOUSE_RELEASE (0xFFFF-25) +#define TB_KEY_MOUSE_WHEEL_UP (0xFFFF-26) +#define TB_KEY_MOUSE_WHEEL_DOWN (0xFFFF-27) + +/* These are all ASCII code points below SPACE character and a BACKSPACE key. */ +#define TB_KEY_CTRL_TILDE 0x00 +#define TB_KEY_CTRL_2 0x00 /* clash with 'CTRL_TILDE' */ +#define TB_KEY_CTRL_A 0x01 +#define TB_KEY_CTRL_B 0x02 +#define TB_KEY_CTRL_C 0x03 +#define TB_KEY_CTRL_D 0x04 +#define TB_KEY_CTRL_E 0x05 +#define TB_KEY_CTRL_F 0x06 +#define TB_KEY_CTRL_G 0x07 +#define TB_KEY_BACKSPACE 0x08 +#define TB_KEY_CTRL_H 0x08 /* clash with 'CTRL_BACKSPACE' */ +#define TB_KEY_TAB 0x09 +#define TB_KEY_CTRL_I 0x09 /* clash with 'TAB' */ +#define TB_KEY_CTRL_J 0x0A +#define TB_KEY_CTRL_K 0x0B +#define TB_KEY_CTRL_L 0x0C +#define TB_KEY_ENTER 0x0D +#define TB_KEY_CTRL_M 0x0D /* clash with 'ENTER' */ +#define TB_KEY_CTRL_N 0x0E +#define TB_KEY_CTRL_O 0x0F +#define TB_KEY_CTRL_P 0x10 +#define TB_KEY_CTRL_Q 0x11 +#define TB_KEY_CTRL_R 0x12 +#define TB_KEY_CTRL_S 0x13 +#define TB_KEY_CTRL_T 0x14 +#define TB_KEY_CTRL_U 0x15 +#define TB_KEY_CTRL_V 0x16 +#define TB_KEY_CTRL_W 0x17 +#define TB_KEY_CTRL_X 0x18 +#define TB_KEY_CTRL_Y 0x19 +#define TB_KEY_CTRL_Z 0x1A +#define TB_KEY_ESC 0x1B +#define TB_KEY_CTRL_LSQ_BRACKET 0x1B /* clash with 'ESC' */ +#define TB_KEY_CTRL_3 0x1B /* clash with 'ESC' */ +#define TB_KEY_CTRL_4 0x1C +#define TB_KEY_CTRL_BACKSLASH 0x1C /* clash with 'CTRL_4' */ +#define TB_KEY_CTRL_5 0x1D +#define TB_KEY_CTRL_RSQ_BRACKET 0x1D /* clash with 'CTRL_5' */ +#define TB_KEY_CTRL_6 0x1E +#define TB_KEY_CTRL_7 0x1F +#define TB_KEY_CTRL_SLASH 0x1F /* clash with 'CTRL_7' */ +#define TB_KEY_CTRL_UNDERSCORE 0x1F /* clash with 'CTRL_7' */ +#define TB_KEY_SPACE 0x20 +#define TB_KEY_BACKSPACE2 0x7F +#define TB_KEY_CTRL_8 0x7F /* clash with 'DELETE' */ + +/* These are non-existing ones. + * + * #define TB_KEY_CTRL_1 clash with '1' + * #define TB_KEY_CTRL_9 clash with '9' + * #define TB_KEY_CTRL_0 clash with '0' + */ + +/* Currently there is only one modifier. See also struct tb_event's mod + * field. + */ +#define TB_MOD_ALT 0x01 + +/* Colors (see struct tb_cell's fg and bg fields). */ +#define TB_DEFAULT 0x00 +#define TB_BLACK 0x01 +#define TB_RED 0x02 +#define TB_GREEN 0x03 +#define TB_YELLOW 0x04 +#define TB_BLUE 0x05 +#define TB_MAGENTA 0x06 +#define TB_CYAN 0x07 +#define TB_WHITE 0x08 + +/* Attributes, it is possible to use multiple attributes by combining them + * using bitwise OR ('|'). Although, colors cannot be combined. But you can + * combine attributes and a single color. See also struct tb_cell's fg and bg + * fields. + */ +#define TB_BOLD 0x0100 +#define TB_UNDERLINE 0x0200 +#define TB_REVERSE 0x0400 + +/* A cell, single conceptual entity on the terminal screen. The terminal screen + * is basically a 2d array of cells. It has the following fields: + * - 'ch' is a unicode character + * - 'fg' foreground color and attributes + * - 'bg' background color and attributes + */ +struct tb_cell { + uint32_t ch; + uint16_t fg; + uint16_t bg; +}; + +#define TB_EVENT_KEY 1 +#define TB_EVENT_RESIZE 2 +#define TB_EVENT_MOUSE 3 + +/* This struct represents a termbox event. The 'mod', 'key' and 'ch' fields are + * valid if 'type' is TB_EVENT_KEY. The 'w' and 'h' fields are valid if 'type' + * is TB_EVENT_RESIZE. The 'x' and 'y' fields are valid if 'type' is + * TB_EVENT_MOUSE. + */ +struct tb_event { + uint8_t type; + uint8_t mod; + uint16_t key; + uint32_t ch; + int32_t w; + int32_t h; + int32_t x; + int32_t y; +}; + +/* Error codes returned by tb_init(). All of them are self-explanatory, except + * the pipe trap error. Termbox uses unix pipes in order to deliver a message + * from a signal handler (SIGWINCH) to the main event reading loop. Honestly in + * most cases you should just check the returned code as < 0. + */ +#define TB_EUNSUPPORTED_TERMINAL -1 +#define TB_EFAILED_TO_OPEN_TTY -2 +#define TB_EPIPE_TRAP_ERROR -3 + +/* Initializes the termbox library. This function should be called before any + * other functions. After successful initialization, the library must be + * finalized using the tb_shutdown() function. + */ +SO_IMPORT int tb_init(void); +SO_IMPORT void tb_shutdown(void); + +/* Returns the size of the internal back buffer (which is the same as + * terminal's window size in characters). The internal buffer can be resized + * after tb_clear() or tb_present() function calls. Both dimensions have an + * unspecified negative value when called before tb_init() or after + * tb_shutdown(). + */ +SO_IMPORT int tb_width(void); +SO_IMPORT int tb_height(void); + +/* Clears the internal back buffer using TB_DEFAULT color or the + * color/attributes set by tb_set_clear_attributes() function. + */ +SO_IMPORT void tb_clear(void); +SO_IMPORT void tb_set_clear_attributes(uint16_t fg, uint16_t bg); + +/* Synchronizes the internal back buffer with the terminal. */ +SO_IMPORT void tb_present(void); + +#define TB_HIDE_CURSOR -1 + +/* Sets the position of the cursor. Upper-left character is (0, 0). If you pass + * TB_HIDE_CURSOR as both coordinates, then the cursor will be hidden. Cursor + * is hidden by default. + */ +SO_IMPORT void tb_set_cursor(int cx, int cy); + +/* Changes cell's parameters in the internal back buffer at the specified + * position. + */ +SO_IMPORT void tb_put_cell(int x, int y, const struct tb_cell *cell); +SO_IMPORT void tb_change_cell(int x, int y, uint32_t ch, uint16_t fg, uint16_t bg); + +/* Copies the buffer from 'cells' at the specified position, assuming the + * buffer is a two-dimensional array of size ('w' x 'h'), represented as a + * one-dimensional buffer containing lines of cells starting from the top. + * + * (DEPRECATED: use tb_cell_buffer() instead and copy memory on your own) + */ +SO_IMPORT void tb_blit(int x, int y, int w, int h, const struct tb_cell *cells); + +/* Returns a pointer to internal cell back buffer. You can get its dimensions + * using tb_width() and tb_height() functions. The pointer stays valid as long + * as no tb_clear() and tb_present() calls are made. The buffer is + * one-dimensional buffer containing lines of cells starting from the top. + */ +SO_IMPORT struct tb_cell *tb_cell_buffer(); + +#define TB_INPUT_CURRENT 0 /* 000 */ +#define TB_INPUT_ESC 1 /* 001 */ +#define TB_INPUT_ALT 2 /* 010 */ +#define TB_INPUT_MOUSE 4 /* 100 */ + +/* Sets the termbox input mode. Termbox has two input modes: + * 1. Esc input mode. + * When ESC sequence is in the buffer and it doesn't match any known + * ESC sequence => ESC means TB_KEY_ESC. + * 2. Alt input mode. + * When ESC sequence is in the buffer and it doesn't match any known + * sequence => ESC enables TB_MOD_ALT modifier for the next keyboard event. + * + * If 'mode' is TB_INPUT_CURRENT, it returns the current input mode. + */ +SO_IMPORT int tb_select_input_mode(int mode); + +#define TB_OUTPUT_CURRENT 0 +#define TB_OUTPUT_NORMAL 1 +#define TB_OUTPUT_256 2 +#define TB_OUTPUT_216 3 +#define TB_OUTPUT_GRAYSCALE 4 + +/* Sets the termbox output mode. Termbox has three output options: + * 1. TB_OUTPUT_NORMAL => [1..8] + * This mode provides 8 different colors: + * black, red, green, yellow, blue, magenta, cyan, white + * Shortcut: TB_BLACK, TB_RED, ... + * Attributes: TB_BOLD, TB_UNDERLINE, TB_REVERSE + * + * Example usage: + * tb_change_cell(x, y, '@', TB_BLACK | TB_BOLD, TB_RED); + * + * 2. TB_OUTPUT_256 => [0..256] + * In this mode you can leverage the 256 terminal mode: + * 0x00 - 0x07: the 8 colors as in TB_OUTPUT_NORMAL + * 0x08 - 0x0f: TB_* | TB_BOLD + * 0x10 - 0xe7: 216 different colors + * 0xe8 - 0xff: 24 different shades of grey + * + * Example usage: + * tb_change_cell(x, y, '@', 184, 240); + * tb_change_cell(x, y, '@', 0xb8, 0xf0); + * + * 2. TB_OUTPUT_216 => [0..216] + * This mode supports the 3rd range of the 256 mode only. + * But you don't need to provide an offset. + * + * 3. TB_OUTPUT_GRAYSCALE => [0..23] + * This mode supports the 4th range of the 256 mode only. + * But you dont need to provide an offset. + * + * Execute build/src/demo/output to see its impact on your terminal. + * + * If 'mode' is TB_OUTPUT_CURRENT, it returns the current output mode. + */ +SO_IMPORT int tb_select_output_mode(int mode); + +/* Wait for an event up to 'timeout' milliseconds and fill the 'event' + * structure with it, when the event is available. Returns the type of the + * event (one of TB_EVENT_* constants) or -1 if there was an error or 0 in case + * there were no event during 'timeout' period. + */ +SO_IMPORT int tb_peek_event(struct tb_event *event, int timeout); + +/* Wait for an event forever and fill the 'event' structure with it, when the + * event is available. Returns the type of the event (one of TB_EVENT_* + * constants) or -1 if there was an error. + */ +SO_IMPORT int tb_poll_event(struct tb_event *event); + +/* Utility utf8 functions. */ +#define TB_EOF -1 +SO_IMPORT int tb_utf8_char_length(char c); +SO_IMPORT int tb_utf8_char_to_unicode(uint32_t *out, const char *c); +SO_IMPORT int tb_utf8_unicode_to_char(char *out, uint32_t c); + +#ifdef __cplusplus +} +#endif diff --git a/cpp/termbox/utf8.c b/cpp/termbox/utf8.c new file mode 100644 index 000000000..0c37dae55 --- /dev/null +++ b/cpp/termbox/utf8.c @@ -0,0 +1,79 @@ +#include "termbox.h" + +static const unsigned char utf8_length[256] = { + 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, + 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, + 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, + 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, + 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, + 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, + 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, + 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,4,4,4,4,4,4,4,4,5,5,5,5,6,6,1,1 +}; + +static const unsigned char utf8_mask[6] = { + 0x7F, + 0x1F, + 0x0F, + 0x07, + 0x03, + 0x01 +}; + +int tb_utf8_char_length(char c) +{ + return utf8_length[(unsigned char)c]; +} + +int tb_utf8_char_to_unicode(uint32_t *out, const char *c) +{ + if (*c == 0) + return TB_EOF; + + int i; + unsigned char len = tb_utf8_char_length(*c); + unsigned char mask = utf8_mask[len-1]; + uint32_t result = c[0] & mask; + for (i = 1; i < len; ++i) { + result <<= 6; + result |= c[i] & 0x3f; + } + + *out = result; + return (int)len; +} + +int tb_utf8_unicode_to_char(char *out, uint32_t c) +{ + int len = 0; + int first; + int i; + + if (c < 0x80) { + first = 0; + len = 1; + } else if (c < 0x800) { + first = 0xc0; + len = 2; + } else if (c < 0x10000) { + first = 0xe0; + len = 3; + } else if (c < 0x200000) { + first = 0xf0; + len = 4; + } else if (c < 0x4000000) { + first = 0xf8; + len = 5; + } else { + first = 0xfc; + len = 6; + } + + for (i = len - 1; i > 0; --i) { + out[i] = (c & 0x3f) | 0x80; + c >>= 6; + } + out[0] = c | first; + + return len; +}