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authorDenys Vlasenko <vda.linux@googlemail.com>2009-10-25 22:50:56 (GMT)
committer Denys Vlasenko <vda.linux@googlemail.com>2009-10-25 22:50:56 (GMT)
commita17eeb847e66824c4d389751cc90415d3fc1c5a3 (patch)
treea5dd027573c002641942191f8ae1f7c7b1f7429e
parent77c066ea5cf4b1ee606a81e48388ff0b1d019134 (diff)
downloadbusybox-a17eeb847e66824c4d389751cc90415d3fc1c5a3.tar.gz
busybox-a17eeb847e66824c4d389751cc90415d3fc1c5a3.tar.bz2
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>
-rw-r--r--include/libbb.h5
-rw-r--r--libbb/lineedit.c97
-rw-r--r--libbb/read_key.c16
3 files changed, 90 insertions, 28 deletions
diff --git a/include/libbb.h b/include/libbb.h
index a1744ec..6274ea2 100644
--- a/include/libbb.h
+++ b/include/libbb.h
@@ -1203,6 +1203,11 @@ enum {
KEYCODE_DELETE = -9,
KEYCODE_PAGEUP = -10,
KEYCODE_PAGEDOWN = -11,
+
+ KEYCODE_CTRL_UP = KEYCODE_UP & ~0x40,
+ KEYCODE_CTRL_DOWN = KEYCODE_DOWN & ~0x40,
+ KEYCODE_CTRL_RIGHT = KEYCODE_RIGHT & ~0x40,
+ KEYCODE_CTRL_LEFT = KEYCODE_LEFT & ~0x40,
#if 0
KEYCODE_FUN1 = -12,
KEYCODE_FUN2 = -13,
diff --git a/libbb/lineedit.c b/libbb/lineedit.c
index 5f5beb1..bfd0e33 100644
--- a/libbb/lineedit.c
+++ b/libbb/lineedit.c
@@ -16,12 +16,18 @@
/*
* Usage and known bugs:
- * Terminal key codes are not extensive, and more will probably
- * need to be added. This version was created on Debian GNU/Linux 2.x.
+ * Terminal key codes are not extensive, more needs to be added.
+ * This version was created on Debian GNU/Linux 2.x.
* Delete, Backspace, Home, End, and the arrow keys were tested
* to work in an Xterm and console. Ctrl-A also works as Home.
* Ctrl-E also works as End.
*
+ * The following readline-like commands are not implemented:
+ * ESC-b -- Move back one word
+ * ESC-f -- Move forward one word
+ * ESC-d -- Delete forward one word
+ * CTL-t -- Transpose two characters
+ *
* lineedit does not know that the terminal escape sequences do not
* take up space on the screen. The redisplay code assumes, unless
* told otherwise, that each character in the prompt is a printable
@@ -64,11 +70,9 @@
#if ENABLE_FEATURE_ASSUME_UNICODE
# define BB_NUL L'\0'
# define CHAR_T wchar_t
-# define BB_isspace(c) iswspace(c)
-# define BB_isalnum(c) iswalnum(c)
-# define BB_ispunct(c) iswpunct(c)
-# define BB_isprint(c) iswprint(c)
-/* this catches bugs */
+static bool BB_isspace(CHAR_T c) { return ((unsigned)c < 256 && isspace(c)); }
+static bool BB_isalnum(CHAR_T c) { return ((unsigned)c < 256 && isalnum(c)); }
+static bool BB_ispunct(CHAR_T c) { return ((unsigned)c < 256 && ispunct(c)); }
# undef isspace
# undef isalnum
# undef ispunct
@@ -83,11 +87,6 @@
# define BB_isspace(c) isspace(c)
# define BB_isalnum(c) isalnum(c)
# define BB_ispunct(c) ispunct(c)
-# if ENABLE_LOCALE_SUPPORT
-# define BB_isprint(c) isprint(c)
-# else
-# define BB_isprint(c) ((c) >= ' ' && (c) != ((unsigned char)'\233'))
-# endif
#endif
@@ -1302,24 +1301,10 @@ static void remember_in_history(char *str)
#endif /* MAX_HISTORY */
+#if ENABLE_FEATURE_EDITING_VI
/*
- * This function is used to grab a character buffer
- * from the input file descriptor and allows you to
- * a string with full command editing (sort of like
- * a mini readline).
- *
- * The following standard commands are not implemented:
- * ESC-b -- Move back one word
- * ESC-f -- Move forward one word
- * ESC-d -- Delete back one word
- * ESC-h -- Delete forward one word
- * CTL-t -- Transpose two characters
- *
- * Minimalist vi-style command line editing available if configured.
* vi mode implemented 2005 by Paul Fox <pgf@foxharp.boston.ma.us>
*/
-
-#if ENABLE_FEATURE_EDITING_VI
static void
vi_Word_motion(int eat)
{
@@ -1428,6 +1413,58 @@ vi_back_motion(void)
}
#endif
+/* Modelled after bash 4.0 behavior of Ctrl-<arrow> */
+static void ctrl_left(void)
+{
+ CHAR_T *command = command_ps;
+
+ while (1) {
+ CHAR_T c;
+
+ input_backward(1);
+ if (cursor == 0)
+ break;
+ c = command[cursor];
+ if (c != ' ' && !BB_ispunct(c)) {
+ /* we reached a "word" delimited by spaces/punct.
+ * go to its beginning */
+ while (1) {
+ c = command[cursor - 1];
+ if (c == ' ' || BB_ispunct(c))
+ break;
+ input_backward(1);
+ if (cursor == 0)
+ break;
+ }
+ break;
+ }
+ }
+}
+static void ctrl_right(void)
+{
+ CHAR_T *command = command_ps;
+
+ while (1) {
+ CHAR_T c;
+
+ c = command[cursor];
+ if (c == BB_NUL)
+ break;
+ if (c != ' ' && !BB_ispunct(c)) {
+ /* we reached a "word" delimited by spaces/punct.
+ * go to its end + 1 */
+ while (1) {
+ input_forward();
+ c = command[cursor];
+ if (c == BB_NUL || c == ' ' || BB_ispunct(c))
+ break;
+ }
+ break;
+ }
+ input_forward();
+ }
+}
+
/*
* read_line_input and its helpers
@@ -2028,6 +2065,12 @@ int FAST_FUNC read_line_input(const char *prompt, char *command, int maxsize, li
case KEYCODE_LEFT:
input_backward(1);
break;
+ case KEYCODE_CTRL_LEFT:
+ ctrl_left();
+ break;
+ case KEYCODE_CTRL_RIGHT:
+ ctrl_right();
+ break;
case KEYCODE_DELETE:
input_delete(0);
break;
diff --git a/libbb/read_key.c b/libbb/read_key.c
index d3832fa..410a999 100644
--- a/libbb/read_key.c
+++ b/libbb/read_key.c
@@ -22,7 +22,6 @@ int64_t FAST_FUNC read_key(int fd, char *buffer)
'O','B' |0x80,KEYCODE_DOWN ,
'O','C' |0x80,KEYCODE_RIGHT ,
'O','D' |0x80,KEYCODE_LEFT ,
- /* Ctrl-<arrow>: ESC [ 1 ; 5 x, where x = A/B/C/D */
'O','H' |0x80,KEYCODE_HOME ,
'O','F' |0x80,KEYCODE_END ,
#if 0
@@ -37,15 +36,26 @@ int64_t FAST_FUNC read_key(int fd, char *buffer)
'[','B' |0x80,KEYCODE_DOWN ,
'[','C' |0x80,KEYCODE_RIGHT ,
'[','D' |0x80,KEYCODE_LEFT ,
+ /* ESC [ 1 ; 2 x, where x = A/B/C/D: Shift-<arrow> */
+ /* ESC [ 1 ; 3 x, where x = A/B/C/D: Alt-<arrow> */
+ /* ESC [ 1 ; 4 x, where x = A/B/C/D: Alt-Shift-<arrow> */
+ /* ESC [ 1 ; 5 x, where x = A/B/C/D: Ctrl-<arrow> - implemented below */
+ /* ESC [ 1 ; 6 x, where x = A/B/C/D: Ctrl-Shift-<arrow> */
'[','H' |0x80,KEYCODE_HOME , /* xterm */
/* [ESC] ESC [ [2] H - [Alt-][Shift-]Home */
'[','F' |0x80,KEYCODE_END , /* xterm */
'[','1','~' |0x80,KEYCODE_HOME , /* vt100? linux vt? or what? */
'[','2','~' |0x80,KEYCODE_INSERT ,
+ /* ESC [ 2 ; 3 ~ - Alt-Insert */
'[','3','~' |0x80,KEYCODE_DELETE ,
/* [ESC] ESC [ 3 [;2] ~ - [Alt-][Shift-]Delete */
+ /* ESC [ 3 ; 3 ~ - Alt-Delete */
+ /* ESC [ 3 ; 5 ~ - Ctrl-Delete */
'[','4','~' |0x80,KEYCODE_END , /* vt100? linux vt? or what? */
'[','5','~' |0x80,KEYCODE_PAGEUP ,
+ /* ESC [ 5 ; 3 ~ - Alt-PgUp */
+ /* ESC [ 5 ; 5 ~ - Ctrl-PgUp */
+ /* ESC [ 5 ; 7 ~ - Ctrl-Alt-PgUp */
'[','6','~' |0x80,KEYCODE_PAGEDOWN,
'[','7','~' |0x80,KEYCODE_HOME , /* vt100? linux vt? or what? */
'[','8','~' |0x80,KEYCODE_END , /* vt100? linux vt? or what? */
@@ -64,6 +74,10 @@ int64_t FAST_FUNC read_key(int fd, char *buffer)
'[','2','3','~'|0x80,KEYCODE_FUN11 ,
'[','2','4','~'|0x80,KEYCODE_FUN12 ,
#endif
+ '[','1',';','5','A' |0x80,KEYCODE_CTRL_UP ,
+ '[','1',';','5','B' |0x80,KEYCODE_CTRL_DOWN ,
+ '[','1',';','5','C' |0x80,KEYCODE_CTRL_RIGHT,
+ '[','1',';','5','D' |0x80,KEYCODE_CTRL_LEFT ,
0
};