Version 0.5.11 of package Mmm-Mode has just been released in GNU ELPA. You can now find it in M-x list-packages RET.
Mmm-Mode describes itself as: ====================================== Allow Multiple Major Modes in a buffer ====================================== More at https://elpa.gnu.org/packages/mmm-mode.html ## Summary: MMM Mode for Emacs ================== OVERVIEW MMM Mode is a minor mode for Emacs that allows Multiple Major Modes to coexist in one buffer. It is well-suited to editing: * Preprocessed code, such as server-side Ruby, Perl or PHP embedded in HTML * Code generating code, such as HTML output by CGI scripts * Embedded code, such as Javascript in HTML * Literate programming: code interspersed with documentation, e.g. Noweb INSTALLATION Use any of the following options: 1. Users of package.el (a.k.a. ELPA) can easily install MMM Mode from the ELPA package repository at https://elpa.gnu.org/ -- this is the preferred and best-supported installation mechanism. ## Recent NEWS: MMM Mode NEWS -- history of user-visible changes. -*-outline-*- Copyright (C) 2003, 2004, 2013-2022 Free Software Foundation, Inc. See the file COPYING for copying conditions. Please submit bug reports at https://github.com/dgutov/mmm-mode/issues * Changes in MMM Mode 0.5.11 The codebase migrated to use lexical-binding. Documentation updates. * Changes in MMM Mode 0.5.10 Functions mmm-add-find-file-hooks and mmm-add-find-file-hook have been removed (GH#137). * Changes in MMM Mode 0.5.9 Made the tests work in batch mode. Switched from Automake to plain Makefile. Now requires at least GNU Emacs 25.1. Info documentation can be generated by the GNU ELPA packager. New here document class for shell. The new class handles indented here documents, which are incompatible with the mmm classes shared with Perl. * Changes in MMM Mode 0.5.8 Support for Emacs 27. Fixes for nesting submodes. * Changes in MMM Mode 0.5.7 Fixes for mmm-indent-line-narrowed. * Changes in MMM Mode 0.5.6 Emacs 25 compatibility fix when cl is not loaded. * Changes in MMM Mode 0.5.5 Introduced mode transition hooks, like mmm-x-enter-hook and mmm-y-exit-hook. New function mmm-indent-line-narrowed, to use as mmm-indent-line-function. `cl-lib' is a new dependency, replacing `cl'. It comes bundled with recent versions of Emacs, and for older ones it can be installed from GNU ELPA. * Changes in MMM Mode 0.5.4 Fixes for indentation, SMIE support, and minor bugs. * Changes in MMM Mode 0.5.2 Introduced `mmm-after-syntax-propertize-functions'. A primary major mode can set it to adjust `syntax-table' text properties in submode regions. New file `mmm-defaults.el'. A user can simply require it and have basic setup for ERB, EJS and PHP files (for the last one, `php-mode' has to be installed separately). `mmm-add-classes' is autoloaded. `mmm-beginning-of-syntax' was removed. Assorted highlighting and syntax detection improvements. * Changes in MMM Mode 0.5.1 Some minor documentation updates and bugfixes. * Changes in MMM Mode 0.5.0 ** Compatibility with recent Emacsen Updated to work with Emacs 23 and 24. Removed some compatibility code for older versions. Added new local variables used in the latest js-mode and cc-engine modes. ** New submode classes New submode classes for ERB and EJS templates, both in mmm-erb.el. It also includes a smart indentation algorithm, supporting them together with script and style tag subregions in HTML code. ** Parsing when idle Setting `mmm-parse-when-idle' will make MMM Mode re-parse modified buffers when Emacs is idle. This can lead to visible pauses, though, depending on the size of the buffer and the number of subregions. ** Support submode-specific syntax functions Relevant for Emacs 24: we define a composite syntax-propertize-function that delegates syntax recognition to respective submode functions. For users, this means regular expressions in js-mode and string interpolations and percent literals in ruby-mode. ** Indentation More consistent indentation behavior, the default implementation delegates to the submode at the end of the indentation. The major mode can provide its own implementation by setting mmm-indent-line-function, to handle specific mode combinations better. * Changes in MMM Mode 0.4.8 ** Delimiter Regions The delimiters which mark off submode regions now have their own overlays. They can be highlighted if you so desire using appropriate class arguments and/or the variable mmm-delimiter-face. They are also in an appropriate major mode, or non-mode as the case may be. ** Nested Submodes Nested submodes are now vaguely supported. ** RPM Spec File An RPM spec file, contributed by <bis...@platypus.bc.ca>, is now included for people who wish to build their own SRPM to install from. ** New Submode Classes Many thanks to Joe Kelsey for writing a very intelligent class for editing Noweb files, and to Alan Shutko for one for CWeb files. We also have a mode for SGML DTD definitions from Yann Dirson. ... ...
