The extension allows changing the default 16 ANSI colors using a 24 bit RGB value in hexadecimal notation. Support has been added by a handful of terminal emulators, most notably xterm. The OSC color palette is an extension to the ANSI color standard using a modification of the Operating System Command sequence, documented in the Linux console manual as early as 1996. Below is a system that is both consistent and 12 bit compatible. The 24 bit RGB values used for the 16 ANSI colors differ greatly for each terminal implementation. The escape code is terminated with an 'm'.ĪNSI color code (Select Graphic Rendition) The ANSI x3.64 standard was released in 1979 and later updated by the 5th edition ECMA-48 standard in 1991, ISO/IEC 6429 in 1992, and ISO-8613-3 in 1995.ĪNSI escape codes are started using \e[ and contain numeric codes separated by semicolons. This means that xterm-color.el can correctly handle sequences that span input batches while also being faster than ansi-color.el.ANSI escape codes are a standard for in-band signaling to control the cursor location, color, and other options on text terminals. It implements a state machine to handle ANSI SGR sequences rather than using regular expressions like ansi-color.el. It supports the standard ANSI color protocol plus XTERM 256 colors. It can also be used standalone in your own modes. Xterm-color.el is an alternative to ansi-color.el for both comint and eshell. TtyFormat – using ansi-color as a buffer-file-format.That is the function where you would have to add your stuff. If you still want to investigate this, take a look at term-emulate-terminal. It makes no sense to add ansi-color to these modes. ‘M-x term’ and ‘M-x ansi-term’ do their own highlighting. Don’t try it on /dev or similar huge directories: (add-hook 'eshell-preoutput-filter-functions The following will add colors, but its very slow. If you want to use it with Eshell, try the following to remove escape sequences from the output: (add-hook 'eshell-preoutput-filter-functions If you’re using an old Emacs, you might have to install ansi-color.el on your LoadPath and add the following to your InitFile: (autoload 'ansi-color-for-comint-mode-on "ansi-color" nil t) Eshell You can also get a copy of ansi-color.el from this wiki. These usually display as garbage within Emacs. Some GNU/Linux distributions allow you to install a “color gcc” – the warnings and errors are colored using escape sequences. (add-to-list 'comint-output-filter-functions 'ansi-color-process-output) If not, use the following line to add it. To install it, put the following into your InitFile: (add-hook 'shell-mode-hook 'ansi-color-for-comint-mode-on)Īnd In order for this to have any effect, ‘ansi-color-process-output’ must be in ‘comint-output-filter-functions’. Cumulative mode means that whenever possible, SGR control sequences are combined (ie. The “Graphic Rendition Combination Mode (GRCM)” implemented by ansi-color.el is “cumulative mode” as defined in section 7.2.8. They can be found in ECMA-48 (section 3.8.117, identical to ISO/IEC 6429), freely available as a PDF file. These escape sequences are best known as “ANSI” which is where they were first standardized. Ansi-color.el translates ANSI SGR (Select Graphic Rendition) escape sequences like “Esc [ 30 m” into EmacsOverlays, TextProperties, or XEmacsExtents with face colours, bold, etc.
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