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| author | Rostislav Skudnov | 2016-11-24 15:04:00 +0100 |
|---|---|---|
| committer | Denys Vlasenko | 2016-11-24 15:04:00 +0100 |
| commit | 2e4ef38743c3d4aef109b5cc04429ec1f0e2f6c8 (patch) | |
| tree | 4224ad31b96cf2b03874083b80da7c4d38995817 /libbb/lineedit.c | |
| parent | cb810c48c036f50c19b08df7e161cdb0550a2abd (diff) | |
| download | busybox-2e4ef38743c3d4aef109b5cc04429ec1f0e2f6c8.zip busybox-2e4ef38743c3d4aef109b5cc04429ec1f0e2f6c8.tar.gz | |
lineedit: fix handling of repeating Alt-b, Alt-f, Alt-d, Alt-Backspace
These key combinations should repeat correctly when the keys are
pressed and held.
Before this change, they do this erratically - many repeats are "eaten"
because they are treated as unrecognized ESC seqs:
ESC 0x7f is treated by Alt+baskspace, but ESC 0x7f ESC 0x7f ESC 0x7f
is unrecognized.
Escape sequences corresponding to these key combinations are moved from
read_line_input to lineedit_read_key.
Also, these key sequences are now enabled regardless of whether
FEATURE_EDITING_VI is set, since Vim does not actually support these key
combinations, but they are present in readline library.
function old new delta
static.esccmds 93 103 +10
read_line_input 3737 3687 -50
Signed-off-by: Rostislav Skudnov <rostislav@tuxera.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'libbb/lineedit.c')
| -rw-r--r-- | libbb/lineedit.c | 60 |
1 files changed, 18 insertions, 42 deletions
diff --git a/libbb/lineedit.c b/libbb/lineedit.c index 2cc61db..ac049f5 100644 --- a/libbb/lineedit.c +++ b/libbb/lineedit.c @@ -13,7 +13,6 @@ * * This code is 'as is' with no warranty. */ - /* * Usage and known bugs: * Terminal key codes are not extensive, more needs to be added. @@ -23,9 +22,6 @@ * 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 @@ -2483,6 +2479,24 @@ int FAST_FUNC read_line_input(line_input_t *st, const char *prompt, char *comman while (cursor > 0 && !BB_isspace(command_ps[cursor-1])) input_backspace(); break; + case KEYCODE_ALT_D: { + /* Delete word forward */ + int nc, sc = cursor; + ctrl_right(); + nc = cursor - sc; + input_backward(nc); + while (--nc >= 0) + input_delete(1); + break; + } + case KEYCODE_ALT_BACKSPACE: { + /* Delete word backward */ + int sc = cursor; + ctrl_left(); + while (sc-- > cursor) + input_delete(1); + break; + } #if ENABLE_FEATURE_REVERSE_SEARCH case CTRL('R'): ic = ic_raw = reverse_i_search(); @@ -2625,44 +2639,6 @@ int FAST_FUNC read_line_input(line_input_t *st, const char *prompt, char *comman vi_cmdmode = 1; input_backward(1); } - /* Handle a few ESC-<key> combinations the same way - * standard readline bindings (IOW: bash) do. - * Often, Alt-<key> generates ESC-<key>. - */ - ic = lineedit_read_key(read_key_buffer, 50); - switch (ic) { - //case KEYCODE_LEFT: - bash doesn't do this - case 'b': - ctrl_left(); - break; - //case KEYCODE_RIGHT: - bash doesn't do this - case 'f': - ctrl_right(); - break; - //case KEYCODE_DELETE: - bash doesn't do this - case 'd': /* Alt-D */ - { - /* Delete word forward */ - int nc, sc = cursor; - ctrl_right(); - nc = cursor - sc; - input_backward(nc); - while (--nc >= 0) - input_delete(1); - break; - } - case '\b': /* Alt-Backspace(?) */ - case '\x7f': /* Alt-Backspace(?) */ - //case 'w': - bash doesn't do this - { - /* Delete word backward */ - int sc = cursor; - ctrl_left(); - while (sc-- > cursor) - input_delete(1); - break; - } - } break; #endif /* FEATURE_COMMAND_EDITING_VI */ |