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Library Information

  • Filename: colour-region.el
  • Description: Toggle regions of the buffer with different text snippets
  • Author: Joe Bloggs <vapniks@yahoo.com>
  • Maintainer: Joe Bloggs <vapniks@yahoo.com>
  • Copyleft (Ↄ) 2013, Joe Bloggs, all rites reversed.
  • Created: Sometime in 2008 (can’t remember when exactly)
  • Version: 0.1
  • Last-Updated: 2013-05-04 21:37:20
  • By: Joe Bloggs
  • URL: https://github.com/vapniks/colour-region
  • Keywords:
  • Compatibility: GNU Emacs 24.3.1
  • Package-Requires:
  • Features that might be required by this library:

Commentary

Bitcoin donations gratefully accepted: 1Aa6Hh39RCBvr6BrxDWvThYynuKcwv6NL4

This library is based on hide-region. You can define areas of the buffer as “colour-regions” which can be toggled between various states, e.g. for hiding or highlighting the text. Each colour-region can also contain several different texts which can be toggled between. I’m not sure how useful this is in practice, but it was fun to build.

Creating colour-regions of different types

You can create a new colour-region by selecting an area of text in the buffer, and executing any of the following commands:

  • colour-region-new
  • colour-region-store-text
  • colour-region-toggle-overlay
  • colour-region-toggle-text

You can choose what type the new colour-region should have by using an appropriate prefix key, e.g. using a prefix of C-3 will create a type 3 colour-region (which is green by default). The colour and formatting for a particular type of colour-region can be customized using the `colour-region-formats’ option.

Prefix keys for commands

For many of the commands you can choose which regions to apply them to by using the appropriate prefix key:

  • No prefix key means apply the command to the colour-region nearest point.
  • A prefix of 0 (i.e. pressing C-0 before entering the command) means apply the command to all colour-regions in the current buffer.
  • A positive non-zero prefix of say N means apply the command to all colour-regions of the Nth type (that were created using the same prefix).

Navigation

You can quickly move between colour regions using the following commands:

  • colour-region-next
  • colour-region-previous

Both of these commands take prefix arg to specify which colour-regions to consider when moving. See the commands documentation for details.

Copying/pasting/removing colour-reginos

Killed/copied colour-regions are stored in `colour-region-kill-ring’. The following commands can be used for copying and pasting colour-regions.

  • colour-region-remove
  • colour-region-copy
  • colour-region-kill
  • colour-region-kill-ring-rotate
  • colour-region-yank
  • colour-region-yank-pop

The remove/copy/kill commands accept the previously mentioned prefix keys to specify with regions they apply to. See the commands documentation for details.

Altering colour-regions

The following commands can be used to alter the content and display format of colour-regions:

  • colour-region-toggle-overlay
  • colour-region-toggle-text
  • colour-region-change-comment
  • colour-region-change-type
  • colour-region-store-text
  • colour-region-func

All of these commands accept the previously mentioned prefix keys for specifying which regions they apply to. See the commands documentation for details.

Saving colour-regions

These commands can be used for loading and saving colour-regions.

  • colour-region-load
  • colour-region-save

Customizable options

The following options can be customized:

  • colour-region-formats : List of text-properties to apply to the different states of each region type.
  • colour-region-save-on-kill : Whether or not to save colour-regions when buffer is killed.
  • colour-region-load-on-find-file : If set to t then always load colour-regions when a new file is opened.
  • colour-region-kill-ring-max : The maximum number of elements allowed on the colour-region-kill-ring before old ones are removed.

See the doc strings for more details.

Hooks

The following hook functions are used to load/save colour regions automatically. They are added to the relevant hooks when colour-region-initialize is run.

  • colour-region-find-file-hook
  • colour-region-kill-emacs-hook
  • colour-region-kill-buffer-hook

Installation

  • If you have marmalade-repo.org, this colour-region is part of the emacs packages you can install. Just type M-x package-install colour-region marmalade
  • Otherwise download the library from here Lisp:colour-region.el, and put it in a directory in the emacs load path, like ~/.emacs.d
  • Add the following lines to your ~/.emacs file:

    (require ‘colour-region) (colour-region-initialize)

Functions

Interactive Functions

Internal Functions

Variables

Customizable Variables

Internal Variables

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Toggle regions of the buffer with different text snippets

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