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Linux remove ansi escape sequences using vi12/31/2023 ![]() So they don't really implement the feature. The 1049 code (introduced in 1998) is recognized by most terminal emulators which claim to be xterm-compatible, but most do not make the feature optional. Modes) 1047, 10 which have the same effect as the Supporting composite control sequences (also known as private Xterm supports terminfo in a different way, Set, xterm also ignores the escape sequence to switch to theĪlternate screen. Many screen-oriented programs) from the TERMCAP string. Specifies whether or not xterm should remove ti and te termcapĮntries (used to switch between alternate screens on startup of The reason for this escape sequence is to provide a terminfo-based way to let users decide whether programs can use the alternate screen. The others are either original to xterm, or adapted from other terminals, as noted. About a third of the private-use modes listed in XTerm Control Sequences correspond to one of DEC's (those have a mnemonic such as DECCKM in their descriptions). ![]() ![]() The question mark shows that it is "private use" (a category set aside for implementation-specific features in the standard). The \u001B[?1049h (and \u001B[?1049l) are escape sequences which tell xterm to optionally switch to and from the alternate screen. The upper/lower case of the number is irrelevant. POSIX would use octal \033, and some others allow hexadecimal \01b. \u001B is an unnecessarily verbose ASCII escape character, which seems to have been introduced for ECMAScript6. ![]()
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