Re: what's intangibility in move-end-of-line?

[Kevin Rodgers]

Xah Lee wrote:
>  aboutin the inline doc for move-end-of-line, it says:
>
> «
> move-end-of-line is an interactive compiled Lisp function in
> `simple.el'.
> It is bound to M-D.
> (move-end-of-line arg)
>
> Move point to end of current line as displayed.
> (If there's an image in the line, this disregards newlines
> which are part of the text that the image rests on.)
>
> With argument arg not nil or 1, move forward arg - 1 lines first.
> If point reaches the beginning or end of buffer, it stops there.
> To ignore intangibility, bind `inhibit-point-motion-hooks' to t.
> »
>
> this seems unclear to me. What is this intangibility? looking up on
> inhibit-point-motion-hooks does not seems to clear up. It seems about
> some properties in lisp symbols.

No, text properties.  You can read about them in the Emacs Lisp manual.
The "Special Properties" says this about intangibility:

,----
| `intangible'
|      If a group of consecutive characters have equal and non-`nil'
|      `intangible' properties, then you cannot place point between them.
|      If you try to move point forward into the group, point actually
|      moves to the end of the group.  If you try to move point backward
|      into the group, point actually moves to the start of the group.
|
|      If consecutive characters have unequal non-`nil' `intangible'
|      properties, they belong to separate groups; each group is
|      separately treated as described above.
|
|      When the variable `inhibit-point-motion-hooks' is non-`nil', the
|      `intangible' property is ignored.
`----

> I need to use this in elisp code. Not sure if it is proper to use in
> elisp code.

Sure it is.  Or (goto-char (line-end-position))

--
Kevin Rodgers
Denver, Colorado, USA