Initial commit
This commit is contained in:
commit
426cc716b9
20
LICENSE
Normal file
20
LICENSE
Normal file
@ -0,0 +1,20 @@
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MIT License
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Copyright 2020 Bruce Hill <bruce@bruce-hill.com>
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Permission is hereby granted, free of charge, to any person obtaining a copy of
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this software and associated documentation files (the "Software"), to deal in
|
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the Software without restriction, including without limitation the rights to
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use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
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of the Software, and to permit persons to whom the Software is furnished to do
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so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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18
Makefile
Normal file
18
Makefile
Normal file
@ -0,0 +1,18 @@
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PREFIX=
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CC ?= gcc
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O ?= -O2
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CFLAGS=-std=c99 -D_XOPEN_SOURCE=500 -D_GNU_SOURCE -D_POSIX_C_SOURCE=200809L
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CWARN=-Wall -Wpedantic -Wextra -Wno-unknown-pragmas -Wno-missing-field-initializers\
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-Wno-padded -Wsign-conversion -Wno-missing-noreturn -Wno-cast-qual -Wtype-limits
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#CFLAGS += -fsanitize=address -fno-omit-frame-pointer
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G=
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all: test
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clean:
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rm -f test
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%: %.c btui.h
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$(CC) $(CFLAGS) $(CWARN) $(G) $(O) $< -o $@
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.PHONY: all, clean
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5
README.md
Normal file
5
README.md
Normal file
@ -0,0 +1,5 @@
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# BTUI - Bruce's Text User Interface Library
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BTUI is a minimal, embeddable single header file alternative to bloatware like
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ncurses. BTUI aims to be under 1/1,000th the size of ncurses, while also
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providing a more usable and modern API.
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457
btui.h
Normal file
457
btui.h
Normal file
@ -0,0 +1,457 @@
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/*
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* btui.h
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* Copyright 2020 Bruce Hill
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* Released under the MIT License
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*
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* This file defines some Text User Interface (TUI) functionality.
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*/
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#ifndef FILE__BTUI_H
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#define FILE__BTUI_H
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/ioctl.h>
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#include <termios.h>
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#include <time.h>
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#include <unistd.h>
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int btui_enable(FILE *term);
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int btui_disable(FILE *term);
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int btui_getkey(FILE *in, int *mouse_x, int *mouse_y);
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char *btui_keyname(int key, char *buf);
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int btui_keynamed(const char *name);
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int move_cursor(FILE *term, int x, int y);
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struct winsize winsize = {0};
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int winsize_changed = 0;
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// Terminal escape sequences:
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#define T_WRAP "7"
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#define T_SHOW_CURSOR "25"
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#define T_MOUSE_XY "1000"
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#define T_MOUSE_CELL "1002"
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#define T_MOUSE_SGR "1006"
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#define T_ALT_SCREEN "1049"
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#define T_ON(opt) "\033[?" opt "h"
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#define T_OFF(opt) "\033[?" opt "l"
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const char *TUI_ENTER = T_OFF(T_SHOW_CURSOR ";" T_WRAP) T_ON(T_ALT_SCREEN ";" T_MOUSE_XY ";" T_MOUSE_CELL ";" T_MOUSE_SGR);
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const char *TUI_LEAVE = T_ON(T_SHOW_CURSOR ";" T_WRAP) T_OFF(T_ALT_SCREEN ";" T_MOUSE_XY ";" T_MOUSE_CELL ";" T_MOUSE_SGR);
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// Maximum time in milliseconds between double clicks
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#ifndef DOUBLECLICK_THRESHOLD
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#define DOUBLECLICK_THRESHOLD 200
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#endif
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// Keyboard modifiers:
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#define MOD_BITSHIFT 9
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#define MOD_META (1 << (MOD_BITSHIFT + 0))
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#define MOD_CTRL (1 << (MOD_BITSHIFT + 1))
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#define MOD_ALT (1 << (MOD_BITSHIFT + 2))
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#define MOD_SHIFT (1 << (MOD_BITSHIFT + 3))
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typedef enum {
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// ASCII chars:
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KEY_CTRL_AT = 0x00, KEY_CTRL_A, KEY_CTRL_B, KEY_CTRL_C, KEY_CTRL_D,
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KEY_CTRL_E, KEY_CTRL_F, KEY_CTRL_G, KEY_CTRL_H, KEY_CTRL_I, KEY_CTRL_J,
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KEY_CTRL_K, KEY_CTRL_L, KEY_CTRL_M, KEY_CTRL_N, KEY_CTRL_O, KEY_CTRL_P,
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KEY_CTRL_Q, KEY_CTRL_R, KEY_CTRL_S, KEY_CTRL_T, KEY_CTRL_U, KEY_CTRL_V,
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KEY_CTRL_W, KEY_CTRL_X, KEY_CTRL_Y, KEY_CTRL_Z,
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KEY_CTRL_LSQ_BRACKET, KEY_CTRL_BACKSLASH, KEY_CTRL_RSQ_BRACKET,
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KEY_CTRL_CARET, KEY_CTRL_UNDERSCORE, KEY_SPACE,
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// Printable chars would be here
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KEY_BACKSPACE2 = 0x7F,
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// Non-ascii multi-byte keys:
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KEY_F0, KEY_F1, KEY_F2, KEY_F3, KEY_F4, KEY_F5, KEY_F6, KEY_F7, KEY_F8,
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KEY_F9, KEY_F10, KEY_F11, KEY_F12,
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KEY_INSERT, KEY_DELETE, KEY_HOME, KEY_END, KEY_PGUP, KEY_PGDN,
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KEY_ARROW_UP, KEY_ARROW_DOWN, KEY_ARROW_LEFT, KEY_ARROW_RIGHT,
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MOUSE_LEFT_PRESS, MOUSE_RIGHT_PRESS, MOUSE_MIDDLE_PRESS,
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MOUSE_LEFT_DRAG, MOUSE_RIGHT_DRAG, MOUSE_MIDDLE_DRAG,
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MOUSE_LEFT_RELEASE, MOUSE_RIGHT_RELEASE, MOUSE_MIDDLE_RELEASE,
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MOUSE_LEFT_DOUBLE, MOUSE_RIGHT_DOUBLE, MOUSE_MIDDLE_DOUBLE,
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MOUSE_WHEEL_RELEASE, MOUSE_WHEEL_PRESS,
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} bkey_t;
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// Overlapping key codes:
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#define KEY_CTRL_BACKTICK 0x00 /* clash with ^@ */
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#define KEY_CTRL_2 0x00 /* clash with ^@ */
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#define KEY_BACKSPACE 0x08 /* clash with ^H */
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#define KEY_TAB 0x09 /* clash with ^I */
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#define KEY_ENTER 0x0D /* clash with ^M */
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#define KEY_ESC 0x1B /* clash with ^[ */
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#define KEY_CTRL_3 0x1B /* clash with ^[ */
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#define KEY_CTRL_4 0x1C /* clash with ^\ */
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#define KEY_CTRL_5 0x1D /* clash with ^] */
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#define KEY_CTRL_TILDE 0x1E /* clash with ^^ */
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#define KEY_CTRL_6 0x1E /* clash with ^^ */
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#define KEY_CTRL_7 0x1F /* clash with ^_ */
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#define KEY_CTRL_SLASH 0x1F /* clash with ^_ */
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#define KEY_SPACE 0x20
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#define KEY_BACKSPACE2 0x7F
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#define KEY_CTRL_8 0x7F /* clash with 'BACKSPACE2' */
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typedef struct {
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int key;
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const char *name;
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} keyname_t;
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static keyname_t key_names[] = {
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{KEY_SPACE, "Space"}, {KEY_BACKSPACE2, "Backspace"},
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{KEY_F1, "F1"}, {KEY_F2, "F2"}, {KEY_F3, "F3"}, {KEY_F4, "F4"}, {KEY_F5, "F5"},
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{KEY_F6, "F6"}, {KEY_F7, "F7"}, {KEY_F8, "F8"}, {KEY_F9, "F9"}, {KEY_F10, "F10"},
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{KEY_F11, "F11"}, {KEY_F12, "F12"},
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{KEY_INSERT, "Insert"}, {KEY_DELETE, "Delete"},
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{KEY_HOME, "Home"}, {KEY_END, "End"},
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{KEY_PGUP, "PgUp"}, {KEY_PGUP, "Page Up"},
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{KEY_PGDN, "PgDn"}, {KEY_PGDN, "Page Down"},
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{KEY_ARROW_UP, "Up"}, {KEY_ARROW_DOWN, "Down"}, {KEY_ARROW_LEFT, "Left"}, {KEY_ARROW_RIGHT, "Right"},
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{MOUSE_LEFT_PRESS, "Left press"}, {MOUSE_RIGHT_PRESS, "Right press"}, {MOUSE_MIDDLE_PRESS, "Middle press"},
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{MOUSE_LEFT_DRAG, "Left drag"}, {MOUSE_RIGHT_DRAG, "Right drag"}, {MOUSE_MIDDLE_DRAG, "Middle drag"},
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{MOUSE_LEFT_RELEASE, "Left click"}, {MOUSE_RIGHT_RELEASE, "Right click"}, {MOUSE_MIDDLE_RELEASE, "Middle click"},
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{MOUSE_LEFT_RELEASE, "Left up"}, {MOUSE_RIGHT_RELEASE, "Right up"}, {MOUSE_MIDDLE_RELEASE, "Middle up"},
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{MOUSE_LEFT_RELEASE, "Left release"}, {MOUSE_RIGHT_RELEASE, "Right release"}, {MOUSE_MIDDLE_RELEASE, "Middle release"},
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{MOUSE_LEFT_DOUBLE, "Double left click"}, {MOUSE_RIGHT_DOUBLE, "Double right click"}, {MOUSE_MIDDLE_DOUBLE, "Double middle click"},
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{MOUSE_WHEEL_RELEASE, "Mouse wheel up"}, {MOUSE_WHEEL_PRESS, "Mouse wheel down"},
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{KEY_TAB, "Tab"}, {KEY_ENTER, "Enter"}, {KEY_ENTER, "Return"},
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{KEY_CTRL_A, "Ctrl-a"}, {KEY_CTRL_B, "Ctrl-b"}, {KEY_CTRL_C, "Ctrl-c"},
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{KEY_CTRL_D, "Ctrl-d"}, {KEY_CTRL_E, "Ctrl-e"}, {KEY_CTRL_F, "Ctrl-f"},
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{KEY_CTRL_G, "Ctrl-g"}, {KEY_CTRL_H, "Ctrl-h"}, {KEY_CTRL_I, "Ctrl-i"},
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{KEY_CTRL_J, "Ctrl-j"}, {KEY_CTRL_K, "Ctrl-k"}, {KEY_CTRL_L, "Ctrl-l"},
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{KEY_CTRL_M, "Ctrl-m"}, {KEY_CTRL_N, "Ctrl-n"}, {KEY_CTRL_O, "Ctrl-o"},
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{KEY_CTRL_P, "Ctrl-p"}, {KEY_CTRL_Q, "Ctrl-q"}, {KEY_CTRL_R, "Ctrl-r"},
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{KEY_CTRL_S, "Ctrl-s"}, {KEY_CTRL_T, "Ctrl-t"}, {KEY_CTRL_U, "Ctrl-u"},
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{KEY_CTRL_V, "Ctrl-v"}, {KEY_CTRL_W, "Ctrl-w"}, {KEY_CTRL_X, "Ctrl-x"},
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{KEY_CTRL_Y, "Ctrl-y"}, {KEY_CTRL_Z, "Ctrl-z"},
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{KEY_ESC, "Esc"}, {KEY_ESC, "Escape"},
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{KEY_CTRL_TILDE, "Ctrl-~"}, {KEY_CTRL_BACKSLASH, "Ctrl-\\"},
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{KEY_CTRL_LSQ_BRACKET, "Ctrl-]"}, {KEY_CTRL_RSQ_BRACKET, "Ctrl-]"},
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{KEY_CTRL_UNDERSCORE, "Ctrl-_"}, {KEY_CTRL_SLASH, "Ctrl-/"},
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{KEY_CTRL_AT, "Ctrl-@"}, {KEY_CTRL_CARET, "Ctrl-^"},
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{KEY_CTRL_BACKTICK, "Ctrl-`"},
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{KEY_CTRL_2, "Ctrl-2"}, {KEY_CTRL_3, "Ctrl-3"}, {KEY_CTRL_4, "Ctrl-4"},
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{KEY_CTRL_5, "Ctrl-5"}, {KEY_CTRL_6, "Ctrl-6"}, {KEY_CTRL_7, "Ctrl-7"},
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{KEY_CTRL_5, "Ctrl-8"}, {KEY_CTRL_6, "Ctrl-9"},
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{':', "Colon"},
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};
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static inline int nextchar(int fd)
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{
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char c;
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return read(fd, &c, 1) == 1 ? c : -1;
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}
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static inline int nextnum(int fd, int c, int *n)
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{
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for (*n = 0; '0' <= c && c <= '9'; c = nextchar(fd))
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*n = 10*(*n) + (c - '0');
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return c;
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}
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|
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/*
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* Get one key of input from the given file. Returns -1 on failure.
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* If mouse_x or mouse_y are non-null and a mouse event occurs, they will be
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* set to the position of the mouse (0-indexed).
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*/
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int btui_getkey(FILE *in, int *mouse_x, int *mouse_y)
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{
|
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if (mouse_x) *mouse_x = -1;
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if (mouse_y) *mouse_y = -1;
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int fd = fileno(in);
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int numcode = 0, modifiers = 0;
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int c = nextchar(fd);
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if (c == '\x1b')
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goto escape;
|
||||
|
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return c;
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|
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escape:
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c = nextchar(fd);
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// Actual escape key:
|
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if (c < 0)
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return KEY_ESC;
|
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|
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switch (c) {
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case '\x1b': return KEY_ESC;
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case '[': c = nextchar(fd); goto CSI_start;
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case 'P': goto DCS;
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case 'O': goto SS3;
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default: return MOD_ALT | c;
|
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}
|
||||
|
||||
CSI_start:
|
||||
if (c == -1)
|
||||
return MOD_ALT | '[';
|
||||
|
||||
switch (c) {
|
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case 'A': return modifiers | KEY_ARROW_UP;
|
||||
case 'B': return modifiers | KEY_ARROW_DOWN;
|
||||
case 'C': return modifiers | KEY_ARROW_RIGHT;
|
||||
case 'D': return modifiers | KEY_ARROW_LEFT;
|
||||
case 'F': return modifiers | KEY_END;
|
||||
case 'H': return modifiers | KEY_HOME;
|
||||
case 'J': return numcode == 2 ? (MOD_SHIFT | KEY_HOME) : -1;
|
||||
case 'K': return MOD_SHIFT | KEY_END;
|
||||
case 'M': return MOD_CTRL | KEY_DELETE;
|
||||
case 'P': return modifiers | (numcode == 1 ? KEY_F1 : KEY_DELETE);
|
||||
case 'Q': return numcode == 1 ? (modifiers | KEY_F2) : -1;
|
||||
case 'R': return numcode == 1 ? (modifiers | KEY_F3) : -1;
|
||||
case 'S': return numcode == 1 ? (modifiers | KEY_F4) : -1;
|
||||
case '~':
|
||||
switch (numcode) {
|
||||
case 1: return modifiers | KEY_HOME;
|
||||
case 2: return modifiers | KEY_INSERT;
|
||||
case 3: return modifiers | KEY_DELETE;
|
||||
case 4: return modifiers | KEY_END;
|
||||
case 5: return modifiers | KEY_PGUP;
|
||||
case 6: return modifiers | KEY_PGDN;
|
||||
case 7: return modifiers | KEY_HOME;
|
||||
case 8: return modifiers | KEY_END;
|
||||
case 10: return modifiers | KEY_F0;
|
||||
case 11: return modifiers | KEY_F1;
|
||||
case 12: return modifiers | KEY_F2;
|
||||
case 13: return modifiers | KEY_F3;
|
||||
case 14: return modifiers | KEY_F4;
|
||||
case 15: return modifiers | KEY_F5;
|
||||
case 17: return modifiers | KEY_F6;
|
||||
case 18: return modifiers | KEY_F7;
|
||||
case 19: return modifiers | KEY_F8;
|
||||
case 20: return modifiers | KEY_F9;
|
||||
case 21: return modifiers | KEY_F10;
|
||||
case 23: return modifiers | KEY_F11;
|
||||
case 24: return modifiers | KEY_F12;
|
||||
}
|
||||
return -1;
|
||||
case '<': { // Mouse clicks
|
||||
int buttons = 0, x = 0, y = 0;
|
||||
c = nextnum(fd, nextchar(fd), &buttons);
|
||||
if (c != ';') return -1;
|
||||
c = nextnum(fd, nextchar(fd), &x);
|
||||
if (c != ';') return -1;
|
||||
c = nextnum(fd, nextchar(fd), &y);
|
||||
if (c != 'm' && c != 'M') return -1;
|
||||
|
||||
if (mouse_x) *mouse_x = x - 1;
|
||||
if (mouse_y) *mouse_y = y - 1;
|
||||
|
||||
if (buttons & 4) modifiers |= MOD_SHIFT;
|
||||
if (buttons & 8) modifiers |= MOD_META;
|
||||
if (buttons & 16) modifiers |= MOD_CTRL;
|
||||
int key = -1;
|
||||
switch (buttons & ~(4|8|16)) {
|
||||
case 0: key = c == 'm' ? MOUSE_LEFT_RELEASE : MOUSE_LEFT_PRESS; break;
|
||||
case 1: key = c == 'm' ? MOUSE_MIDDLE_RELEASE : MOUSE_MIDDLE_PRESS; break;
|
||||
case 2: key = c == 'm' ? MOUSE_RIGHT_RELEASE : MOUSE_RIGHT_PRESS; break;
|
||||
case 32: key = MOUSE_LEFT_DRAG; break;
|
||||
case 33: key = MOUSE_MIDDLE_DRAG; break;
|
||||
case 34: key = MOUSE_RIGHT_DRAG; break;
|
||||
case 64: key = MOUSE_WHEEL_RELEASE; break;
|
||||
case 65: key = MOUSE_WHEEL_PRESS; break;
|
||||
default: return -1;
|
||||
}
|
||||
if (key == MOUSE_LEFT_RELEASE || key == MOUSE_RIGHT_RELEASE || key == MOUSE_MIDDLE_RELEASE) {
|
||||
static int lastclick = -1;
|
||||
static struct timespec lastclicktime = {0, 0};
|
||||
struct timespec clicktime;
|
||||
clock_gettime(CLOCK_MONOTONIC, &clicktime);
|
||||
if (key == lastclick) {
|
||||
double dt_ms = 1e3*(double)(clicktime.tv_sec - lastclicktime.tv_sec)
|
||||
+ 1e-6*(double)(clicktime.tv_nsec - lastclicktime.tv_nsec);
|
||||
if (dt_ms < DOUBLECLICK_THRESHOLD) {
|
||||
switch (key) {
|
||||
case MOUSE_LEFT_RELEASE: key = MOUSE_LEFT_DOUBLE; break;
|
||||
case MOUSE_RIGHT_RELEASE: key = MOUSE_RIGHT_DOUBLE; break;
|
||||
case MOUSE_MIDDLE_RELEASE: key = MOUSE_MIDDLE_DOUBLE; break;
|
||||
}
|
||||
}
|
||||
}
|
||||
lastclicktime = clicktime;
|
||||
lastclick = key;
|
||||
}
|
||||
return modifiers | key;
|
||||
}
|
||||
default:
|
||||
if ('0' <= c && c <= '9') {
|
||||
// Ps prefix
|
||||
c = nextnum(fd, c, &numcode);
|
||||
if (c == ';') {
|
||||
c = nextnum(fd, nextchar(fd), &modifiers);
|
||||
modifiers = (modifiers >> 1) << MOD_BITSHIFT;
|
||||
}
|
||||
goto CSI_start;
|
||||
}
|
||||
}
|
||||
return -1;
|
||||
|
||||
DCS:
|
||||
return -1;
|
||||
|
||||
SS3:
|
||||
switch (nextchar(fd)) {
|
||||
case 'P': return KEY_F1;
|
||||
case 'Q': return KEY_F2;
|
||||
case 'R': return KEY_F3;
|
||||
case 'S': return KEY_F4;
|
||||
default: break;
|
||||
}
|
||||
return -1;
|
||||
}
|
||||
|
||||
/*
|
||||
* Populate `buf` with the name of a key.
|
||||
*/
|
||||
char *btui_keyname(int key, char *buf)
|
||||
{
|
||||
if (key & MOD_META) buf = stpcpy(buf, "Super-");
|
||||
if (key & MOD_CTRL) buf = stpcpy(buf, "Ctrl-");
|
||||
if (key & MOD_ALT) buf = stpcpy(buf, "Alt-");
|
||||
if (key & MOD_SHIFT) buf = stpcpy(buf, "Shift-");
|
||||
key &= ~(MOD_META | MOD_CTRL | MOD_ALT | MOD_SHIFT);
|
||||
for (size_t i = 0; i < sizeof(key_names)/sizeof(key_names[0]); i++) {
|
||||
if (key_names[i].key == key) {
|
||||
return stpcpy(buf, key_names[i].name);
|
||||
}
|
||||
}
|
||||
if (' ' < key && key <= '~')
|
||||
return buf + sprintf(buf, "%c", key);
|
||||
else
|
||||
return buf + sprintf(buf, "\\x%02X", key);
|
||||
}
|
||||
|
||||
/*
|
||||
* Return the key with the given name, if one exists, otherwise -1.
|
||||
* (i.e. btui_keynamed("Space") == ' ', btui_keynamed("x") == 'x', btui_keynamed("F1") == KEY_F1, btui_keynamed("???") == -1)
|
||||
*/
|
||||
int btui_keynamed(const char *name)
|
||||
{
|
||||
int modifiers = 0;
|
||||
static const struct { const char *prefix; int modifier; } modnames[] = {
|
||||
{"Super-", MOD_META}, {"Ctrl-", MOD_CTRL}, {"Alt-", MOD_ALT}, {"Shift-", MOD_SHIFT}
|
||||
};
|
||||
check_names:
|
||||
for (size_t i = 0; i < sizeof(key_names)/sizeof(key_names[0]); i++) {
|
||||
if (strcmp(key_names[i].name, name) == 0)
|
||||
return modifiers | key_names[i].key;
|
||||
}
|
||||
for (size_t i = 0; i < sizeof(modnames)/sizeof(modnames[0]); i++) {
|
||||
if (strncmp(name, modnames[i].prefix, strlen(modnames[i].prefix)) == 0) {
|
||||
modifiers |= modnames[i].modifier;
|
||||
name += strlen(modnames[i].prefix);
|
||||
goto check_names;
|
||||
}
|
||||
}
|
||||
return strlen(name) == 1 ? name[0] : -1;
|
||||
}
|
||||
|
||||
|
||||
static const struct termios default_termios = {
|
||||
.c_iflag = ICRNL,
|
||||
.c_oflag = OPOST | ONLCR | NL0 | CR0 | TAB0 | BS0 | VT0 | FF0,
|
||||
.c_lflag = ISIG | ICANON | IEXTEN | ECHO | ECHOE | ECHOK | ECHOCTL | ECHOKE,
|
||||
.c_cflag = CS8 | CREAD,
|
||||
.c_cc[VINTR] = '',
|
||||
.c_cc[VQUIT] = ' ',
|
||||
.c_cc[VERASE] = 127,
|
||||
.c_cc[VKILL] = '',
|
||||
.c_cc[VEOF] = '',
|
||||
.c_cc[VSTART] = '',
|
||||
.c_cc[VSTOP] = '',
|
||||
.c_cc[VSUSP] = '',
|
||||
.c_cc[VREPRINT] = '',
|
||||
.c_cc[VWERASE] = '',
|
||||
.c_cc[VLNEXT] = '',
|
||||
.c_cc[VDISCARD] = '',
|
||||
.c_cc[VMIN] = 1,
|
||||
.c_cc[VTIME] = 0,
|
||||
};
|
||||
|
||||
const struct termios tui_termios = {
|
||||
.c_iflag = 0,
|
||||
.c_oflag = ONLCR | NL0 | CR0 | TAB0 | BS0 | VT0 | FF0,
|
||||
.c_lflag = ECHOE | ECHOK | ECHOCTL | ECHOKE,
|
||||
.c_cflag = CS8 | CREAD,
|
||||
.c_cc[VINTR] = '',
|
||||
.c_cc[VQUIT] = ' ',
|
||||
.c_cc[VERASE] = 127,
|
||||
.c_cc[VKILL] = '',
|
||||
.c_cc[VEOF] = '',
|
||||
.c_cc[VSTART] = '',
|
||||
.c_cc[VSTOP] = '',
|
||||
.c_cc[VSUSP] = '',
|
||||
.c_cc[VREPRINT] = '',
|
||||
.c_cc[VWERASE] = '',
|
||||
.c_cc[VLNEXT] = '',
|
||||
.c_cc[VDISCARD] = '',
|
||||
.c_cc[VMIN] = 1,
|
||||
.c_cc[VTIME] = 0,
|
||||
};
|
||||
|
||||
static FILE *terminal;
|
||||
|
||||
static void cleanup(void)
|
||||
{
|
||||
if (!terminal) return;
|
||||
tcsetattr(fileno(terminal), TCSANOW, &default_termios);
|
||||
fputs(TUI_LEAVE, terminal);
|
||||
fflush(terminal);
|
||||
}
|
||||
|
||||
static void cleanup_and_raise(int sig)
|
||||
{
|
||||
cleanup();
|
||||
raise(sig);
|
||||
// This code will only ever be run if sig is SIGTSTP/SIGSTOP, otherwise, raise() won't return:
|
||||
btui_enable(terminal);
|
||||
struct sigaction sa = {.sa_handler = &cleanup_and_raise, .sa_flags = (int)(SA_NODEFER | SA_RESETHAND)};
|
||||
sigaction(sig, &sa, NULL);
|
||||
}
|
||||
|
||||
static void update_term_size(int sig)
|
||||
{
|
||||
(void)sig;
|
||||
struct winsize oldsize = winsize;
|
||||
ioctl(STDIN_FILENO, TIOCGWINSZ, &winsize);
|
||||
winsize_changed |= (oldsize.ws_col != winsize.ws_col || oldsize.ws_row != winsize.ws_row);
|
||||
}
|
||||
|
||||
int btui_enable(FILE *term)
|
||||
{
|
||||
if (tcsetattr(fileno(term), TCSANOW, &tui_termios) == -1)
|
||||
return -1;
|
||||
|
||||
atexit(cleanup);
|
||||
terminal = term;
|
||||
|
||||
struct sigaction sa_winch = {.sa_handler = &update_term_size};
|
||||
sigaction(SIGWINCH, &sa_winch, NULL);
|
||||
int signals[] = {SIGTERM, SIGINT, SIGXCPU, SIGXFSZ, SIGVTALRM, SIGPROF, SIGSEGV, SIGTSTP};
|
||||
struct sigaction sa = {.sa_handler = &cleanup_and_raise, .sa_flags = (int)(SA_NODEFER | SA_RESETHAND)};
|
||||
for (size_t i = 0; i < sizeof(signals)/sizeof(signals[0]); i++)
|
||||
sigaction(signals[i], &sa, NULL);
|
||||
|
||||
update_term_size(0);
|
||||
winsize_changed = 0;
|
||||
|
||||
fputs(TUI_ENTER, term);
|
||||
fflush(term);
|
||||
return 0;
|
||||
}
|
||||
|
||||
int btui_disable(FILE *term)
|
||||
{
|
||||
terminal = term;
|
||||
cleanup();
|
||||
return 0;
|
||||
}
|
||||
|
||||
int move_cursor(FILE *term, int x, int y)
|
||||
{
|
||||
return fprintf(term, "\033[%d;%dH", y+1, x+1);
|
||||
}
|
||||
|
||||
#endif
|
||||
// vim: ts=4 sw=0 et cino=L2,l1,(0,W4,m1
|
||||
33
test.c
Normal file
33
test.c
Normal file
@ -0,0 +1,33 @@
|
||||
#include <stdio.h>
|
||||
#include "btui.h"
|
||||
|
||||
int main(void)
|
||||
{
|
||||
FILE *tty_in = fopen("/dev/tty", "r");
|
||||
FILE *tty_out = fopen("/dev/tty", "w");
|
||||
btui_enable(tty_out);
|
||||
int done = 0;
|
||||
int x = 0, y = 0;
|
||||
int i = 0;
|
||||
while (!done) {
|
||||
move_cursor(tty_out, 0, winsize.ws_row-1);
|
||||
fprintf(tty_out, "Update %d, size = %dx%d", i++, winsize.ws_col, winsize.ws_row);
|
||||
fflush(tty_out);
|
||||
|
||||
int key = btui_getkey(tty_in, NULL, NULL);
|
||||
switch (key) {
|
||||
case 'q': case KEY_CTRL_C: done = 1; break;
|
||||
case -1: break;
|
||||
default: {
|
||||
char buf[256] = {0};
|
||||
btui_keyname(key, buf);
|
||||
move_cursor(tty_out, x, y++);
|
||||
fprintf(tty_out, "Pressed: %s", buf);
|
||||
fflush(tty_out);
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
btui_disable(tty_out);
|
||||
return 0;
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user