78ff8197c
Denis Vlasenko
2008-06-28
Subject
lineedit: document prompt handling
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libbb/lineedit.c+17 -11
| @@ -15,17 +15,23 @@ | |
| */ | |
| /* | |
| - | 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. |
| - | 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. |
| - | |
| - | Small bugs (simple effect): |
| - | - not true viewing if terminal size (x*y symbols) less |
| - | size (prompt + editor's line + 2 symbols) |
| - | - not true viewing if length prompt less terminal width |
| + | * 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. |
| + | * 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. |
| + | * |
| + | * 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 |
| + | * character that takes up one character position on the screen. |
| + | * You need to tell lineedit that some sequences of characters |
| + | * in the prompt take up no screen space. Compatibly with readline, |
| + | * use the \[ escape to begin a sequence of non-printing characters, |
| + | * and the \] escape to signal the end of such a sequence. Example: |
| + | * |
| + | * PS1='\[\033[01;32m\]\u@\h\[\033[01;34m\] \w \$\[\033[00m\] ' |
| */ | |
| #include "libbb.h" | |