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Richard M. Stallman 1994-04-10 00:23:58 +00:00
parent 2a6a354983
commit 72654a3c97
2 changed files with 35 additions and 16 deletions
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3
lispref/hooks.texi
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@ -32,12 +32,14 @@ are passed arguments, or else their values are used).
@table @code
@item activate-mark-hook
@item after-change-function
@item after-change-functions
@item after-init-hook
@item after-insert-file-functions
@item after-make-frame-hook
@item auto-fill-function
@item auto-save-hook
@item before-change-function
@item before-change-functions
@item before-init-hook
@item before-make-frame-hook
@item blink-paren-function
@ -82,6 +84,7 @@ are passed arguments, or else their values are used).
@item mh-letter-mode-hook
@item mim-mode-hook
@item minibuffer-setup-hook
@item minibuffer-exit-hook
@item news-mode-hook
@item news-reply-mode-hook
@item news-setup-hook

48
lispref/text.texi
View file

@ -2192,6 +2192,12 @@ appear on the screen. This works much like selective display. Details
of this feature are likely to change in future versions, so check the
@file{etc/NEWS} file in the version you are using.
@item intangible
@kindex intangible @r{(text property)}
A non-@code{nil} @code{intangible} property on a character prevents
putting point before that character. If you try, point actually goes
after the character (and after all succeeding intangible characters).
@item modification-hooks
@cindex change hooks for a character
@cindex hooks for changing a character
@ -2624,29 +2630,39 @@ data if they do anything that uses regular expressions; otherwise, they
will interfere in bizarre ways with the editing operations that call
them.
@defvar before-change-functions
This variable holds a list of a functions to call before any buffer
modification. Each function gets two arguments, the beginning and end
of the region that is about to change, represented as integers. The
buffer that is about to change is always the current buffer.
@end defvar
@defvar after-change-functions
This variable holds a list of a functions to call after any buffer
modification. Each function receives three arguments: the beginning and
end of the region just changed, and the length of the text that existed
before the change. (To get the current length, subtract the region
beginning from the region end.) All three arguments are integers. The
buffer that's about to change is always the current buffer.
@end defvar
@defvar before-change-function
If this variable is non-@code{nil}, then it should be a function; the
function is called before any buffer modification. Its arguments are
the beginning and end of the region that is about to change,
represented as integers. The buffer that is about to change is always
the current buffer.
This variable holds one function to call before any buffer modification
(or @code{nil} for no function). It is called just like the functions
in @code{before-change-functions}.
@end defvar
@defvar after-change-function
If this variable is non-@code{nil}, then it should be a function; the
function is called after any buffer modification. It receives three
arguments: the beginning and end of the region just changed, and the
length of the text that existed before the change. (To get the
current length, subtract the region beginning from the region end.)
All three arguments are integers. The buffer that's about to change
is always the current buffer.
This variable holds one function to call after any buffer modification
(or @code{nil} for no function). It is called just like the functions in
@code{after-change-functions}.
@end defvar
Both of these variables are temporarily bound to @code{nil} during the
time that either of these hooks is running. This means that if one of
The four variables above are temporarily bound to @code{nil} during the
time that any of these functions is running. This means that if one of
these functions changes the buffer, that change won't run these
functions. If you do want the hook function to run recursively,
design your hook functions to bind these variables back to their usual
functions. If you do want a hook function to make changes that run
these functions, make it bind these variables back to their usual
values.
@defvar first-change-hook