Gri Extras
1: Introduction
2: Simple example
3: Fancy example
4: Running Gri
5: Programming Gri
6: General Issues
7: X-Y Plots
8: Contour Plots
9: Image Plots
10: Examples
11: Handling Data
12: Gri Commands
13: Gri Extras
14: Evolution of Gri
15: Installing Gri
16: Gri Bugs
17: System Tools
18: Acknowledgments
19: License
20: Newsgroup
21: Concept Index
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13.6: Editing Gri Files in GNU Emacs
If you use the GNU Emacs text editor, writing Gri command files is made
easier by using the Gri editing mode.
The Emacs gri-mode was written by Peter S. Galbraith
(at email address `psg@debian.org '.
Here is an overview of the gri-mode features:
-
It indents if statements, loops, and so on
(`
gri-indent-line ', `TAB').
-
It can complete partially typed commands (`
gri-complete ',
`M-TAB') and help you edit the syntax that was thus inserted for you
(`gri-option-select ', `C-C C-o').
-
It can provide a short help synopsis (`
gri-help-this-command ',
`C-C C-h'), or load the info manual at the location where the command
is described (`gri-info-this-command ', `C-C C-i'), or help regarding
any command (`gri-help ', `C-C M-h') and provide completion
of command name at the prompt (`TAB'), or help you
find an unknown command by listing all containing a given word
(`gri-help-apropos ', `C-C C-a').
-
It can let you run Gri and view its output without leaving the editor
(`
gri-run ', `C-C C-r'). If an error is encountered, Emacs will
rearrange the buffer so the cursor is on the bad line of the Gri command-file.
-
If you've already run Gri, and therefore have a PostScript output file,
the mode will let you view that file (`
gri-view ', `C-C C-v')
even if that file is compressed.
Thus one never has to leave Emacs; type `C-C C-r' to run Gri, and if
there is no error, the graph comes up automatically. If there was an error,
gri-mode will move editing point to the line with the error and display
the error message. Given that the mode can complete partially typed commands,
this means a substantial saving in development time.
Click here
to get to Gri FTP site, where the mode is stored as
grimode.el
To install gri-mode in your emacs, the only emacs variable you need
to set in your .emacs file (and this only if your gri installation departs
from default parameters) is gri*directory-tree or gri*path.
-
If your `
gri ' and `gri.cmd' reside in the same
directory (this is the standard Gri installation scheme before version
2.040), then you need to set the variable `gri*path ' before you
load `gri-mode.el '. For example, if both files are in
`/usr/local/bin', you add the following to your `~/.emacs'
file:
(setq gri*path "/usr/local/bin/")
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-
If you use a gri directory tree (as is the standard since Gri version
2.040), then do not set `
gri*path '. Instead, set
`gri*directory-tree ' to the root of this tree. For example, if
your gri files reside in directories like named
`/usr/bin/gri'
and
`/usr/share/gri/lib/gri.cmd',
then you'd use:
(setq gri*directory-tree "/usr/share/gri/lib/")
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To access the Gri editing mode, put the file `gri-mode.el' in the
appropriate place (e.g., `/usr/local/share/emacs/19.31/site-lisp'
or some other file named in your Emacs ``load-path''), and then put
lines like the following in your `~/.emacs' file:
(setq gri*WWW-page "file:/usr/doc/gri-2.4.4/html/index.html")
(setq gri*directory-tree "/usr/share/gri/lib/")
(autoload 'gri-mode "gri-mode" "Enter Gri-mode." t)
(setq auto-mode-alist
(cons '("\\.gri$" . gri-mode) auto-mode-alist))
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If you have multiple versions of Gri on your system, the
directory-tree line will look more like the following
(setq gri*directory-tree '("/usr/lib/gri/" "/opt/gri/"))
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The mode controls indentation in much the same way as other modes do.
Emacs will enter the Gri mode whenever you edit a file ending in the
characters `.gri', or if you run the command `gri-mode '.
Inside Gri mode, type `C-h m' for help on the mode.
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