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1.1 root 1: me/Read_me 10/11/90
2:
3: Flexible bindings and emacs programming.
4:
5: The new emacs has two tables for keybindings an old table which
6: is loaded at compile time and is never changed, and a new table
7: which can be modified by the new keybinding commands.
8:
9: The following new commands are implemented.
10:
11: ctl-x m Renames the curent macro ctl-x E to a new binding. The
12: current macro must be defned. This function asks for a
13: new binding (such as ESC z or ctl-f) the current macro
14: is renamed to the new binding. Example:
15: ctl-x ( ESC s xyz ctl-u ctl-d ctl-x ) /* define macro */
16: ctl-x m esc l /* rename it esc l */
17:
18: ctl-x r Requests an old binding and a new binding. The new
19: binding takes on the meaning of the old binding. If the
20: two bindings are the same the new binding is deleted.
21: Examples:
22: ctl-x r esc l esc l /* undefine previous example */
23: ctl-x r ctl-x c ctl-z /* exchange meanings of */
24: ctl-x r ctl-z ctl-x c /* ctl-z and ctl-x c */
25:
26: Note from the second example the old binding table is
27: never changed so the exchange works.
28:
29: If you connect to Coherent via some utility such as kermit
30: you may find that emacs doesn't understand your arrow keys.
31: Flexible binding can often fix that.
32:
33: ctl-x r ctl-p (up arrow)
34: ctl-x r ctl-n (down arrow) /* this may kill esc b */
35: ctl-x r ctl-b (left arrow) /* this may kill esc c */
36: ctl-x r ctl-f (right arrow) /* this may kill esc d */
37:
38: ctl-x s Requests a file name and saves all flexible bindings to
39: that file. If the current macro is completely defined it
40: is also saved. A special macro called the initialization
41: macro is also saved.
42:
43: ctl-x l Requests a file name and reloads all flexible bindings
44: from it. The initialization macro is loaded but not
45: executed.
46:
47: ctl-x x Rebinds prefix key ctl-x, provides two new prefix keys
48: and rebinds ctl-u. Asks for each prefix key or space.
49: Space leaves existing binding. Then it asks for a new
50: binding for ctl-u.
51:
52: -f filename
53: This is an argv parameter. The filename is loaded and
54: after all other listed files are loaded the
55: initialization macro is executed.
56:
57: ctl-x i Rebinds the current macro to the initialization macro.
58:
59: Note if you have some edit sequence to execute on a number
60: of files create it, executeing some meaningless binding such as
61: esc Z at the end. Rebind esc Z to ctl-z. Rebind the current
62: macro to the initialization macro. Save the flexabile bindings
63: to some file. Now use the Coherent do loop to run the
64: initilaization macro on all the files you wish changed.
65:
66: ctl-u -1 some macro
67: The repeat count of -1 for executing a macro means
68: execute the macro until it fails then return success.
69:
70:
71: Emacs programming example. Bulid a macro that finds instances
72: of xyz and deletes the next four characters. Use that macro
73: on a list of files.
74:
75: ctl-x ( esc s xyz [ret] ctl-u ctl-d ctl-x ) /* define the macro */
76: ctl-x m esc a /* name it esc a */
77: ctl-x ( ctl-u -1 [ret] esc a esc z ctl-x ) /* macro with
78: meaningless esc z */
79: ctl-x i /* make it init mac */
80: ctl-x r ctl-z esc z /* esc z = ctl-z */
81: ctl-x s myfile.rc /* save bindings */
82: ctl-z /* exit */
83:
84: me -f myfile.rc datafile.x
85:
86: Notes:
87: ctl-x m and ctl-x r both check that the new name is
88: not ctl-x r. Changing the binding of ctl-x r would
89: alow the user to paint himself into a corner.
90:
91: Earlier documents gave the argv of -b. There is an
92: emacs -b for backup version. I therefore used -f to
93: designate flex binding files.
94:
95: if -f is not specified emacs checks for a flexable
96: bindings file. On Coherent this is presumed to be
97: at $HOME/.emacs.rc On atari and Ms-Dos $LIBPATH\emacs.rc
98:
99: For a complete list of all the keybindings in emacs.
100: Look at bind.doc which is produced by ext.c during
101: the make process.
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