Re: Unicode support for the MS Windows clipboard [new patch]

[Tak Ota]

Benny,

While using emacs for some time (days) the clipboard operation becomes
unavailable and the following error messages appear in the message
buffer.

Copying from emacs and pasting in another application:
  "Error in delayed clipboard rendering: Text is read-only"

Yanking from clipboard into emacs:
  "w32-get-clipboard-data:(text-read-only)"

After restarting the emacs the problem is gone for a while then it
comes back in later time.  Is there a possibility of leaking memory
handles?

-Tak

Mon, 08 Nov 2004 18:24:44 +0100: Benjamin Riefenstahl <address@hidden> wrote:

> Hi all,
> 
> 
> Now that my papers are in order (;-)), here is a new version of the
> much discussed patch to support the Unicode clipboard on Windows
> (attached).
> 
> Notes:
> 
> - I didn't provide user-level documentation except a short mention in
>   etc/NEWS.  The defaults should work fine and there should be less
>   need to customize this than on X11.
> 
> - There is a short discussion of the use of the customization in
>   comments in the code.  Something similar may be usefull in the ELisp
>   manual, probably in "Window System Selections."
> 
> 
> benny
> 
> 
> 2004-11-08  Benjamin Riefenstahl  <address@hidden>
> 
>       * w32select.c: Summary: Thorough rework to implement Unicode
>         clipboard operations and delayed rendering.
> 
>         Drop last_clipboard_text and related code, keep track of
>         ownership via clipboard_owner instead.  Drop old #if0
>         sections.
> 
>       (DEFAULT_LCID, ANSICP, OEMCP, QUNICODE, QANSICP, QOEMCP)
>       (clipboard_owner, modifying_clipboard, cfg_coding_system)
>       (cfg_codepage, cfg_lcid, cfg_clipboard_type, current_text)
>       (current_coding_system, current_requires_encoding)
>       (current_num_nls, current_clipboard_type, current_lcid): New
>       static variables.
> 
>       (convert_to_handle_as_ascii, convert_to_handle_as_coded)
>         (render, render_all, run_protected, lisp_error_handler)
>         (owner_callback, create_owner, setup_config)
>         (enum_locale_callback, cp_from_locale, coding_from_cp): New
>         local functions.
> 
>         (term_w32select, globals_of_w32select): New global functions.
> 
>       (Fw32_set_clipboard_data): Ignore parameter FRAME, use
>       clipboard_owner instead.  Use delayed rendering and provide
>       all text formats.  Provide CF_LOCALE if necessary.
> 
>       (Fw32_get_clipboard_data): Handle CF_UNICODETEXT and
>       CF_LOCALE.  Fall back to CF_TEXT, if CF_UNICODETEXT is not
>       available.  Force DOS line-ends for decoding.
> 
>       (Fx_selection_exists_p): Handle CF_UNICODETEXT.
> 
>       (syms_of_w32select): Init and register new variables.
> 
>         * w32.h: Add prototypes for globals_of_w32select and
>         term_w32select.  Make the neighboring K&R declarations into
>         prototypes, too.
> 
>         * emacs.c: Include w32.h to get function prototypes.
>         (main): Call globals_of_w32select.
> 
>         * w32.c (term_ntproc): Call term_w32select. 
> 
>         * mule-cmds.el (set-locale-environment): Remove call to
>         set-selection-coding-system on Windows.
> 
>         * s/ms-w32.h: Guard MSC-specific #pragmas with an #ifdef.
> 
> 
>