bug#9054: 24.0.50; show source in other window

[martin rudalics]

> The question is whether to show it by default.  The default menu that the
> user will see after clicking somewhere in a new buffer will contain just
> 2 items:
>
>    - Select All
>    - Describe Character `x'

If that new buffer is empty, not even these should be shown.

> I can't imagine that a novice user would need to describe a character
> and inspect the output of describe-char.

It's an entrance into syntax and font-locking, tells me about text and
overlay properties, coding, character sets and composition.  What else
could you desire thinking of how often these topics are discussed here
on these list?

>> A "Select" context submenu should propose something reasonable when
>> there is no active region.  When there is an active region around the
>> mouse position it should say _what_ "Undo" undoes and what "Clear"
>> clears.  And the Edit sub-menu should say the same.
>
> I don't understand what it could say.  Do you mean it should change to
> "Undo in Region"?

I do.  IIUC that's what 'undo' (unfortunately) does when the region is
active.  Likewise it should say "Clear Region".

> Then "Context Menus" could be placed below from "Menu Bar".

I'd say we should pluralize some of these, namely "Scroll Bars",
"Fringes", "Window Dividers" and "Window Tab Lines", move them below
"Speedbar" and after them add "Tooltips" and "Context Menus" and then
the separator.

martin