lineedit: handle Ctrl-arrows
function old new delta read_line_input 4629 4824 +195 BB_isalnum - 39 +39 BB_ispunct - 35 +35 BB_isspace - 31 +31 static.esccmds 69 93 +24 vi_word_motion 165 162 -3 vi_back_motion 204 198 -6 vi_end_motion 172 163 -9 bb_iswspace 28 - -28 bb_iswpunct 32 - -32 bb_iswalnum 37 - -37 ------------------------------------------------------------------------------ (add/remove: 3/3 grow/shrink: 5/8 up/down: 334/-129) Total: 205 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
parent
77c066ea5c
commit
a17eeb847e
@ -1203,6 +1203,11 @@ enum {
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KEYCODE_DELETE = -9,
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KEYCODE_PAGEUP = -10,
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KEYCODE_PAGEDOWN = -11,
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KEYCODE_CTRL_UP = KEYCODE_UP & ~0x40,
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KEYCODE_CTRL_DOWN = KEYCODE_DOWN & ~0x40,
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KEYCODE_CTRL_RIGHT = KEYCODE_RIGHT & ~0x40,
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KEYCODE_CTRL_LEFT = KEYCODE_LEFT & ~0x40,
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#if 0
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KEYCODE_FUN1 = -12,
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KEYCODE_FUN2 = -13,
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@ -16,12 +16,18 @@
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/*
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* Usage and known bugs:
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* Terminal key codes are not extensive, and more will probably
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* need to be added. This version was created on Debian GNU/Linux 2.x.
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* Terminal key codes are not extensive, more needs to be added.
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* This version was created on Debian GNU/Linux 2.x.
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* Delete, Backspace, Home, End, and the arrow keys were tested
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* to work in an Xterm and console. Ctrl-A also works as Home.
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* Ctrl-E also works as End.
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*
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* The following readline-like commands are not implemented:
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* ESC-b -- Move back one word
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* ESC-f -- Move forward one word
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* ESC-d -- Delete forward one word
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* CTL-t -- Transpose two characters
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*
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* lineedit does not know that the terminal escape sequences do not
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* take up space on the screen. The redisplay code assumes, unless
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* told otherwise, that each character in the prompt is a printable
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@ -64,11 +70,9 @@
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#if ENABLE_FEATURE_ASSUME_UNICODE
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# define BB_NUL L'\0'
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# define CHAR_T wchar_t
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# define BB_isspace(c) iswspace(c)
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# define BB_isalnum(c) iswalnum(c)
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# define BB_ispunct(c) iswpunct(c)
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# define BB_isprint(c) iswprint(c)
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/* this catches bugs */
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static bool BB_isspace(CHAR_T c) { return ((unsigned)c < 256 && isspace(c)); }
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static bool BB_isalnum(CHAR_T c) { return ((unsigned)c < 256 && isalnum(c)); }
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static bool BB_ispunct(CHAR_T c) { return ((unsigned)c < 256 && ispunct(c)); }
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# undef isspace
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# undef isalnum
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# undef ispunct
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@ -83,11 +87,6 @@
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# define BB_isspace(c) isspace(c)
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# define BB_isalnum(c) isalnum(c)
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# define BB_ispunct(c) ispunct(c)
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# if ENABLE_LOCALE_SUPPORT
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# define BB_isprint(c) isprint(c)
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# else
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# define BB_isprint(c) ((c) >= ' ' && (c) != ((unsigned char)'\233'))
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# endif
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#endif
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@ -1302,24 +1301,10 @@ static void remember_in_history(char *str)
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#endif /* MAX_HISTORY */
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#if ENABLE_FEATURE_EDITING_VI
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/*
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* This function is used to grab a character buffer
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* from the input file descriptor and allows you to
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* a string with full command editing (sort of like
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* a mini readline).
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*
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* The following standard commands are not implemented:
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* ESC-b -- Move back one word
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* ESC-f -- Move forward one word
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* ESC-d -- Delete back one word
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* ESC-h -- Delete forward one word
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* CTL-t -- Transpose two characters
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*
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* Minimalist vi-style command line editing available if configured.
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* vi mode implemented 2005 by Paul Fox <pgf@foxharp.boston.ma.us>
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*/
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#if ENABLE_FEATURE_EDITING_VI
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static void
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vi_Word_motion(int eat)
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{
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@ -1428,6 +1413,58 @@ vi_back_motion(void)
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}
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#endif
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/* Modelled after bash 4.0 behavior of Ctrl-<arrow> */
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static void ctrl_left(void)
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{
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CHAR_T *command = command_ps;
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while (1) {
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CHAR_T c;
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input_backward(1);
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if (cursor == 0)
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break;
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c = command[cursor];
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if (c != ' ' && !BB_ispunct(c)) {
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/* we reached a "word" delimited by spaces/punct.
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* go to its beginning */
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while (1) {
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c = command[cursor - 1];
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if (c == ' ' || BB_ispunct(c))
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break;
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input_backward(1);
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if (cursor == 0)
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break;
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}
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break;
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}
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}
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}
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static void ctrl_right(void)
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{
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CHAR_T *command = command_ps;
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while (1) {
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CHAR_T c;
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c = command[cursor];
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if (c == BB_NUL)
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break;
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if (c != ' ' && !BB_ispunct(c)) {
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/* we reached a "word" delimited by spaces/punct.
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* go to its end + 1 */
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while (1) {
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input_forward();
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c = command[cursor];
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if (c == BB_NUL || c == ' ' || BB_ispunct(c))
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break;
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}
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break;
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}
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input_forward();
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}
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}
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/*
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* read_line_input and its helpers
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@ -2028,6 +2065,12 @@ int FAST_FUNC read_line_input(const char *prompt, char *command, int maxsize, li
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case KEYCODE_LEFT:
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input_backward(1);
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break;
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case KEYCODE_CTRL_LEFT:
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ctrl_left();
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break;
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case KEYCODE_CTRL_RIGHT:
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ctrl_right();
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break;
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case KEYCODE_DELETE:
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input_delete(0);
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break;
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@ -22,7 +22,6 @@ int64_t FAST_FUNC read_key(int fd, char *buffer)
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'O','B' |0x80,KEYCODE_DOWN ,
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'O','C' |0x80,KEYCODE_RIGHT ,
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'O','D' |0x80,KEYCODE_LEFT ,
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/* Ctrl-<arrow>: ESC [ 1 ; 5 x, where x = A/B/C/D */
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'O','H' |0x80,KEYCODE_HOME ,
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'O','F' |0x80,KEYCODE_END ,
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#if 0
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@ -37,15 +36,26 @@ int64_t FAST_FUNC read_key(int fd, char *buffer)
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'[','B' |0x80,KEYCODE_DOWN ,
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'[','C' |0x80,KEYCODE_RIGHT ,
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'[','D' |0x80,KEYCODE_LEFT ,
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/* ESC [ 1 ; 2 x, where x = A/B/C/D: Shift-<arrow> */
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/* ESC [ 1 ; 3 x, where x = A/B/C/D: Alt-<arrow> */
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/* ESC [ 1 ; 4 x, where x = A/B/C/D: Alt-Shift-<arrow> */
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/* ESC [ 1 ; 5 x, where x = A/B/C/D: Ctrl-<arrow> - implemented below */
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/* ESC [ 1 ; 6 x, where x = A/B/C/D: Ctrl-Shift-<arrow> */
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'[','H' |0x80,KEYCODE_HOME , /* xterm */
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/* [ESC] ESC [ [2] H - [Alt-][Shift-]Home */
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'[','F' |0x80,KEYCODE_END , /* xterm */
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'[','1','~' |0x80,KEYCODE_HOME , /* vt100? linux vt? or what? */
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'[','2','~' |0x80,KEYCODE_INSERT ,
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/* ESC [ 2 ; 3 ~ - Alt-Insert */
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'[','3','~' |0x80,KEYCODE_DELETE ,
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/* [ESC] ESC [ 3 [;2] ~ - [Alt-][Shift-]Delete */
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/* ESC [ 3 ; 3 ~ - Alt-Delete */
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/* ESC [ 3 ; 5 ~ - Ctrl-Delete */
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'[','4','~' |0x80,KEYCODE_END , /* vt100? linux vt? or what? */
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'[','5','~' |0x80,KEYCODE_PAGEUP ,
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/* ESC [ 5 ; 3 ~ - Alt-PgUp */
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/* ESC [ 5 ; 5 ~ - Ctrl-PgUp */
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/* ESC [ 5 ; 7 ~ - Ctrl-Alt-PgUp */
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'[','6','~' |0x80,KEYCODE_PAGEDOWN,
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'[','7','~' |0x80,KEYCODE_HOME , /* vt100? linux vt? or what? */
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'[','8','~' |0x80,KEYCODE_END , /* vt100? linux vt? or what? */
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@ -64,6 +74,10 @@ int64_t FAST_FUNC read_key(int fd, char *buffer)
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'[','2','3','~'|0x80,KEYCODE_FUN11 ,
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'[','2','4','~'|0x80,KEYCODE_FUN12 ,
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#endif
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'[','1',';','5','A' |0x80,KEYCODE_CTRL_UP ,
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'[','1',';','5','B' |0x80,KEYCODE_CTRL_DOWN ,
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'[','1',';','5','C' |0x80,KEYCODE_CTRL_RIGHT,
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'[','1',';','5','D' |0x80,KEYCODE_CTRL_LEFT ,
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0
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};
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