From 2e4ef38743c3d4aef109b5cc04429ec1f0e2f6c8 Mon Sep 17 00:00:00 2001 From: Rostislav Skudnov Date: Thu, 24 Nov 2016 15:04:00 +0100 Subject: 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 Signed-off-by: Denys Vlasenko --- libbb/lineedit.c | 60 +++++++++++++++++--------------------------------------- 1 file changed, 18 insertions(+), 42 deletions(-) (limited to 'libbb/lineedit.c') diff --git a/libbb/lineedit.c b/libbb/lineedit.c index 2cc61db40..ac049f57d 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- combinations the same way - * standard readline bindings (IOW: bash) do. - * Often, Alt- generates ESC-. - */ - 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 */ -- cgit v1.2.3