MIME button mystery

MIME button mystery

[Katsumi Yamaoka]

[-- Attachment #1: Type: text/plain, Size: 245 bytes --]

If you use Gnus to read this article, please try:

Type `M-t' in the summary buffer to make MIME buttons visible.
In the article buffer, put the cursor under a MIME button.
Type the `E' key.

And you will get: Wrong type argument; stringp, nil


[-- Attachment #2: Type: text/plain, Size: 481 bytes --]

Why this happens is that the keymap there is the one for the MIME
buttons, not the article commands, in spite of outside the button
(`C-h c E' there tells that the `E' key is bound to the command
`gnus-mime-view-part-internally'), but there is no handle data
associated with the button above.

What provides the MIME buttons keymap there?  There is neither a
text property nor an overlay that provides a local map, so the
keymap used there should be that for the article commands.

Re: MIME button mystery

[Katsumi Yamaoka]

[-- Attachment #1: Type: text/plain, Size: 278 bytes --]

Katsumi Yamaoka wrote:
> If you use Gnus to read this article, please try:

> Type `M-t' in the summary buffer to make MIME buttons visible.
> In the article buffer, put the cursor under a MIME button.
> Type the `E' key.

> And you will get: Wrong type argument; stringp, nil


[-- Attachment #2: Type: text/plain, Size: 498 bytes --]

> Why this happens is that the keymap there is the one for the MIME
> buttons, not the article commands, in spite of outside the button
> (`C-h c E' there tells that the `E' key is bound to the command
> `gnus-mime-view-part-internally'), but there is no handle data
> associated with the button above.

> What provides the MIME buttons keymap there?  There is neither a
> text property nor an overlay that provides a local map, so the
> keymap used there should be that for the article commands.


[-- Attachment #3: Type: text/plain, Size: 394 bytes --]

I found the cause of this behavior in the `keymap' section of
(info "(Elisp)Special Properties"):
     The property's value for the character before point applies if it
     is non-`nil' and rear-sticky, and the property's value for the
     character after point applies if it is non-`nil' and front-sticky.

So, I've made changes so as to add the (rear-nonsticky t) property
to MIME buttons.