Yanking means inserting text from the kill ring, but it does not
insert the text blindly. The
yank command, and related
insert-for-yank to perform special processing on
the text before it is inserted.
This function works like
insert, except that it processes the
text in string according to the
property, as well as the variables yank-handled-properties and
yank-excluded-properties (see below), before inserting the
result into the current buffer.
insert-buffer-substring-as-yankbuf &optional start end
This function resembles
insert-buffer-substring, except that it
processes the text according to yank-handled-properties and
yank-excluded-properties. (It does not handle the
yank-handler property, which does not normally occur in buffer
If you put a
yank-handler text property on all or part of a
string, that alters how
insert-for-yank inserts the string. If
different parts of the string have different
values (comparison being done with
eq), each substring is
handled separately. The property value must be a list of one to four
elements, with the following format (where elements after the first
may be omitted):
(function param noexclude undo)
Here is what the elements do:
When function is non-
nil, it is called instead of
insert to insert the string, with one argument—the string to
If param is present and non-
nil, it replaces string
(or the substring of string being processed) as the object
passed to function (or
insert). For example, if
yank-rectangle, param should be a list
of strings to insert as a rectangle.
If noexclude is present and non-
nil, that disables the
normal action of yank-handled-properties and
yank-excluded-properties on the inserted string.
If undo is present and non-
nil, it is a function that will be
yank-pop to undo the insertion of the current object.
It is called with two arguments, the start and end of the current
region. function can set yank-undo-function to override
the undo value.
This variable specifies special text property handling conditions for
yanked text. It takes effect after the text has been inserted (either
normally, or via the
yank-handler property), and prior to
yank-excluded-properties taking effect.
The value should be an alist of elements
. fun). Each alist element is handled in order. The inserted
text is scanned for stretches of text having text properties
to prop; for each such stretch, fun is called with three
arguments: the value of the property, and the start and end positions
of the text.
The value of this variable is the list of properties to remove from inserted text. Its default value contains properties that might lead to annoying results, such as causing the text to respond to the mouse or specifying key bindings. It takes effect after yank-handled-properties.