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bug#17684: #22873 (multiple fake cursors); and, #17684 (crosshairs).
From: |
Keith David Bershatsky |
Subject: |
bug#17684: #22873 (multiple fake cursors); and, #17684 (crosshairs). |
Date: |
Sat, 10 Nov 2018 19:36:17 -0800 |
Proof concept patch version 015. Changes include, but are not limited to:
- Coordinates for the fake cursors are now obtained by effectively dumping the
glyph matrix and looking for the desired glyph; e.g., based upon a particular
character position in the buffer, or a particular window relative X. [The
previous versions relied upon moving IT.]
- Multiple fake cursors and crosshairs are now supported in the inactive
window.
- The foreground filled color of a hollow cursor is now configurable,
including, but not limited to when the region inactive, and active region
beginning and/or the active region end.
- Colors of fake cursors in inactive window can be customized to be different
than the active window.
- New fringe indicators when engaging different forms of horizontal scrolling.
- New fringe indicators when the idle timer for crosshairs is pending.
- Other miscellaneous new stuff, but not too significant.
- Miscellaneous bug fixes.
There are miscellaneous changes to the core of Emacs to facilitate generate
tracing/debugging information. Said modifications will eventually be removed.
Due to the fact that I do not presently have a computer set up with MacOS
Mojave, I cannot test a current version of Emacs master branch that includes
the Mojave changes to nsterm.m made by Alan Third some time ago. Based upon
the help I received from Alan on the Emacs Devel mailing list, it would appear
that simply restoring update_window_cursor to its unmodified state will permit
drawing crosshairs and multiple fake cursors on a platform of Emacs for MacOS
Mojave. My recollection is that those restrictions were instituted to prevent
redisplaying the crosshairs in certain mouseover situations.
SETUP:
Step 1: git clone -b master git://git.sv.gnu.org/emacs.git
Step 2: In the new emacs folder, go back to an Emacs version from 07/07/2018:
git reset --hard 98463bed07ecc9057094928ffdc2321eaaf3ab52
[Going back in time to 07/07/2018 saves @lawlist a couple of hours by not having
to deal with unrelated recent changes to the master branch by the Emacs team.]
Step 3: From within the new emacs folder created in Step 1, apply the patch:
git apply /path/to/the/11_10_2018__18_53_09_703.diff
[There should not be any error messages at this point; i.e, you should be
returned to a new command prompt.]
Step 4: ./autogen.sh
Step 5: ./configure ... [your custom options]
Step 6: make
Step 7: make install
- To try out built-in fake cursors with Magnar Sveen's library
(multiple-cursors), install that package first. If the multiple-cursors
package by Magnar Sveen is not already installed, then there are two easy ways
to install that package:
Type: M-x mc-install
OR, evaluate the following snippet:
(progn
(require 'package)
(add-to-list 'package-archives '("melpa" .
"http://melpa.milkbox.net/packages/") t)
(package-initialize)
(package-refresh-contents)
(package-install 'multiple-cursors))
- To try out the crosshairs feature, open a relatively simple buffer (e.g.,
just code or text) and type: M-x +-mode
The default setting is on an idle timer, so just move around or type
something to see how it works.
- To see an example of a variety of built-in cursor styles and widths, type:
M-x mc-test
11_10_2018__18_53_09_703.diff
Description: application/diff
- bug#17684: #22873 (multiple fake cursors); and, #17684 (crosshairs).,
Keith David Bershatsky <=