* 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.
(Fw32_get_clipboard_data): Compare data on clipboard with saved copy
of what Emacs last put there. If they are the same, do not use the
clipboard copy to avoid losing data due to coding conversions.
(syms_of_w32select): DEFVAR_LISP it.
(Fw32_set_clipboard_data): Use Vnext_selection_coding_system if
non-nil. Always convert multibyte strings.
(Fw32_get_clipboard_data): Use Vnext_selection_coding_system if
non-nil. Always convert a string that includes non-ASCII characters.
(Vclipboard_coding_system): New variable.
(syms_of_w32select): DEF_VAR it.
(Fw32_set_clipboard_data): Encode string using
Vclipboard_coding_system if necessary.
(Fw32_get_clipboard_data): Decode clipboard contents using
Vclipboard_coding_system if necessary.
into Windows 95, Windows NT, and W32, respectively.
Expand "win" substring in variables referring to Microsoft Windows
constructs into "windows".
Canonicalize header comments to use same terminology.
