693 lines
20 KiB
C
693 lines
20 KiB
C
/* 16-bit Windows Selection processing for emacs on MS-Windows
|
||
|
||
Copyright (C) 1996-1997, 2001-2024 Free Software Foundation, Inc.
|
||
|
||
Author: Dale P. Smith <dpsm@en.com>
|
||
|
||
This file is part of GNU Emacs.
|
||
|
||
GNU Emacs is free software: you can redistribute it and/or modify
|
||
it under the terms of the GNU General Public License as published by
|
||
the Free Software Foundation, either version 3 of the License, or (at
|
||
your option) any later version.
|
||
|
||
GNU Emacs is distributed in the hope that it will be useful,
|
||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
GNU General Public License for more details.
|
||
|
||
You should have received a copy of the GNU General Public License
|
||
along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>. */
|
||
|
||
/* These functions work by using WinOldAp interface. WinOldAp
|
||
(WINOLDAP.MOD) is a Microsoft Windows extension supporting
|
||
"old" (character-mode) application access to Dynamic Data Exchange,
|
||
menus, and the Windows clipboard. */
|
||
|
||
/* Adapted to DJGPP by Eli Zaretskii <eliz@gnu.org> */
|
||
|
||
#ifdef MSDOS
|
||
|
||
#include <config.h>
|
||
#include <dpmi.h>
|
||
#include <go32.h>
|
||
#include <sys/farptr.h>
|
||
#include "lisp.h"
|
||
#include "dispextern.h" /* frame.h seems to want this */
|
||
#include "frame.h" /* Need this to get the X window of selected_frame */
|
||
#include "blockinput.h"
|
||
#include "character.h"
|
||
#include "buffer.h"
|
||
#include "coding.h"
|
||
#include "composite.h"
|
||
|
||
/* If ever some function outside this file will need to call any
|
||
clipboard-related function, the following prototypes and constants
|
||
should be put on a header file. Right now, nobody else uses them. */
|
||
|
||
#define CF_TEXT 0x01
|
||
#define CF_BITMAP 0x02
|
||
#define CF_METAFILE 0x03
|
||
#define CF_SYLK 0x04
|
||
#define CF_DIF 0x05
|
||
#define CF_TIFF 0x06
|
||
#define CF_OEMTEXT 0x07
|
||
#define CF_DIBBITMAP 0x08
|
||
#define CF_WINWRITE 0x80
|
||
#define CF_DSPTEXT 0x81
|
||
#define CF_DSPBITMAP 0x82
|
||
|
||
unsigned identify_winoldap_version (void);
|
||
unsigned open_clipboard (void);
|
||
unsigned empty_clipboard (void);
|
||
unsigned set_clipboard_data (unsigned, void *, unsigned, int);
|
||
unsigned get_clipboard_data_size (unsigned);
|
||
unsigned get_clipboard_data (unsigned, void *, unsigned, int);
|
||
unsigned close_clipboard (void);
|
||
unsigned clipboard_compact (unsigned);
|
||
|
||
/* The segment address and the size of the buffer in low
|
||
memory used to move data between us and WinOldAp module. */
|
||
static struct {
|
||
unsigned long size;
|
||
unsigned short rm_segment;
|
||
} clipboard_xfer_buf_info;
|
||
|
||
/* The last text we put into the clipboard. This is used to prevent
|
||
passing back our own text from the clipboard, instead of using the
|
||
kill ring. The former is undesirable because the clipboard data
|
||
could be MULEtilated by inappropriately chosen
|
||
(next-)selection-coding-system. For this reason, we must store the
|
||
text *after* it was encoded/Unix-to-DOS-converted. */
|
||
static unsigned char *last_clipboard_text;
|
||
|
||
/* The size of allocated storage for storing the clipboard data. */
|
||
static size_t clipboard_storage_size;
|
||
|
||
/* C functions to access the Windows 3.1x clipboard from DOS apps.
|
||
|
||
The information was obtained from the Microsoft Knowledge Base,
|
||
article Q67675 and can be found at: [broken link -- SK 2021-09-27]
|
||
http://www.microsoft.com/kb/developr/win_dk/q67675.htm */
|
||
|
||
/* See also Ralf Brown's Interrupt List.
|
||
|
||
I also seem to remember reading about this in Dr. Dobbs Journal a
|
||
while ago, but if you knew my memory... :-)
|
||
|
||
Dale P. Smith <dpsm@en.com> */
|
||
|
||
/* Return the WinOldAp support version, or 0x1700 if not supported. */
|
||
unsigned
|
||
identify_winoldap_version (void)
|
||
{
|
||
__dpmi_regs regs;
|
||
|
||
/* Calls Int 2Fh/AX=1700h
|
||
Return Values AX == 1700H: Clipboard functions not available
|
||
<> 1700H: AL = Major version number
|
||
AH = Minor version number */
|
||
regs.x.ax = 0x1700;
|
||
__dpmi_int (0x2f, ®s);
|
||
return regs.x.ax;
|
||
}
|
||
|
||
/* Open the clipboard, return non-zero if successful. */
|
||
unsigned
|
||
open_clipboard (void)
|
||
{
|
||
__dpmi_regs regs;
|
||
|
||
/* Is WINOLDAP supported? */
|
||
/* Kludge alert!! If WinOldAp is not supported, we return a 0,
|
||
which is the same as ``Clipboard already open''. Currently,
|
||
this is taken as an error by all the functions that use
|
||
`open_clipboard', but if somebody someday will use that ``open''
|
||
clipboard, they will have interesting time debugging it... */
|
||
if (identify_winoldap_version () == 0x1700)
|
||
return 0;
|
||
|
||
/* Calls Int 2Fh/AX=1701h
|
||
Return Values AX == 0: Clipboard already open
|
||
<> 0: Clipboard opened */
|
||
regs.x.ax = 0x1701;
|
||
__dpmi_int (0x2f, ®s);
|
||
return regs.x.ax;
|
||
}
|
||
|
||
/* Empty clipboard, return non-zero if successful. */
|
||
unsigned
|
||
empty_clipboard (void)
|
||
{
|
||
__dpmi_regs regs;
|
||
|
||
/* Calls Int 2Fh/AX=1702h
|
||
Return Values AX == 0: Error occurred
|
||
<> 0: OK, Clipboard emptied */
|
||
regs.x.ax = 0x1702;
|
||
__dpmi_int (0x2f, ®s);
|
||
return regs.x.ax;
|
||
}
|
||
|
||
/* Ensure we have a buffer in low memory with enough memory for data
|
||
of size WANT_SIZE. Return the linear address of the buffer. */
|
||
static unsigned long
|
||
alloc_xfer_buf (unsigned want_size)
|
||
{
|
||
__dpmi_regs regs;
|
||
|
||
/* If the usual DJGPP transfer buffer is large enough, use that. */
|
||
if (want_size <= _go32_info_block.size_of_transfer_buffer)
|
||
return __tb & 0xfffff;
|
||
|
||
/* Don't even try to allocate more than 1MB of memory: DOS cannot
|
||
possibly handle that (it will overflow the BX register below). */
|
||
if (want_size > 0xfffff)
|
||
return 0;
|
||
|
||
/* Need size rounded up to the nearest paragraph, and in
|
||
paragraph units (1 paragraph = 16 bytes). */
|
||
clipboard_xfer_buf_info.size = (want_size + 15) >> 4;
|
||
|
||
/* The NT DPMI host crashes us if we free DOS memory via the
|
||
DPMI service. Work around by calling DOS allocate/free block. */
|
||
regs.h.ah = 0x48;
|
||
regs.x.bx = clipboard_xfer_buf_info.size;
|
||
__dpmi_int (0x21, ®s);
|
||
if (regs.x.flags & 1)
|
||
{
|
||
clipboard_xfer_buf_info.size = 0;
|
||
return 0;
|
||
}
|
||
|
||
clipboard_xfer_buf_info.rm_segment = regs.x.ax;
|
||
return (((int)clipboard_xfer_buf_info.rm_segment) << 4) & 0xfffff;
|
||
}
|
||
|
||
/* Free our clipboard buffer. We always free it after use, because
|
||
keeping it leaves less free conventional memory for subprocesses.
|
||
The clipboard buffer tends to be large in size, because for small
|
||
clipboard data sizes we use the DJGPP transfer buffer. */
|
||
static void
|
||
free_xfer_buf (void)
|
||
{
|
||
/* If the size is 0, we used DJGPP transfer buffer, so don't free. */
|
||
if (clipboard_xfer_buf_info.size)
|
||
{
|
||
__dpmi_regs regs;
|
||
|
||
/* The NT DPMI host crashes us if we free DOS memory via
|
||
the DPMI service. Work around by calling DOS free block. */
|
||
regs.h.ah = 0x49;
|
||
regs.x.es = clipboard_xfer_buf_info.rm_segment;
|
||
__dpmi_int (0x21, ®s);
|
||
clipboard_xfer_buf_info.size = 0;
|
||
}
|
||
}
|
||
|
||
/* Copy data into the clipboard, return zero if successful. */
|
||
unsigned
|
||
set_clipboard_data (unsigned Format, void *Data, unsigned Size, int Raw)
|
||
{
|
||
__dpmi_regs regs;
|
||
unsigned truelen;
|
||
unsigned long xbuf_addr, buf_offset;
|
||
unsigned char *dp = Data, *dstart = dp;
|
||
|
||
if (Format != CF_OEMTEXT)
|
||
return 3;
|
||
|
||
/* need to know final size after '\r' chars are inserted (the
|
||
standard CF_OEMTEXT clipboard format uses CRLF line endings,
|
||
while Emacs uses just LF internally). */
|
||
truelen = Size + 1; /* +1 for the terminating null */
|
||
|
||
if (!Raw)
|
||
{
|
||
/* avoid using strchr because it recomputes the length every time */
|
||
while ((dp = memchr (dp, '\n', Size - (dp - dstart))) != 0)
|
||
{
|
||
truelen++;
|
||
dp++;
|
||
}
|
||
}
|
||
|
||
if (clipboard_compact (truelen) < truelen)
|
||
return 1;
|
||
|
||
if ((xbuf_addr = alloc_xfer_buf (truelen)) == 0)
|
||
return 1;
|
||
|
||
/* Move the buffer into the low memory, convert LF into CR-LF if needed. */
|
||
if (Raw)
|
||
{
|
||
dosmemput (Data, Size, xbuf_addr);
|
||
|
||
/* Terminate with a null, otherwise Windows does strange things
|
||
when the text size is an integral multiple of 32 bytes. */
|
||
_farpokeb (_dos_ds, xbuf_addr + Size, '\0');
|
||
}
|
||
else
|
||
{
|
||
dp = Data;
|
||
buf_offset = xbuf_addr;
|
||
_farsetsel (_dos_ds);
|
||
while (Size--)
|
||
{
|
||
/* Don't allow them to put binary data into the clipboard, since
|
||
it will cause yanked data to be truncated at the first null. */
|
||
if (*dp == '\0')
|
||
return 2;
|
||
if (*dp == '\n')
|
||
_farnspokeb (buf_offset++, '\r');
|
||
_farnspokeb (buf_offset++, *dp++);
|
||
}
|
||
|
||
/* Terminate with a null, otherwise Windows does strange things
|
||
when the text size is an integral multiple of 32 bytes. */
|
||
_farnspokeb (buf_offset, '\0');
|
||
}
|
||
|
||
/* Stash away the data we are about to put into the clipboard, so we
|
||
could later check inside get_clipboard_data whether the clipboard
|
||
still holds our data. */
|
||
if (clipboard_storage_size < truelen)
|
||
{
|
||
clipboard_storage_size = truelen + 100;
|
||
last_clipboard_text =
|
||
xrealloc (last_clipboard_text, clipboard_storage_size);
|
||
}
|
||
if (last_clipboard_text)
|
||
dosmemget (xbuf_addr, truelen, last_clipboard_text);
|
||
|
||
/* Calls Int 2Fh/AX=1703h with:
|
||
DX = WinOldAp-Supported Clipboard format
|
||
ES:BX = Pointer to data
|
||
SI:CX = Size of data in bytes
|
||
Return Values AX == 0: Error occurred
|
||
<> 0: OK. Data copied into the Clipboard. */
|
||
regs.x.ax = 0x1703;
|
||
regs.x.dx = Format;
|
||
regs.x.si = truelen >> 16;
|
||
regs.x.cx = truelen & 0xffff;
|
||
regs.x.es = xbuf_addr >> 4;
|
||
regs.x.bx = xbuf_addr & 15;
|
||
__dpmi_int (0x2f, ®s);
|
||
|
||
free_xfer_buf ();
|
||
|
||
/* If the above failed, invalidate the local copy of the clipboard. */
|
||
if (regs.x.ax == 0)
|
||
*last_clipboard_text = '\0';
|
||
|
||
/* Zero means success, otherwise (1, 2, or 3) it's an error. */
|
||
return regs.x.ax > 0 ? 0 : 3;
|
||
}
|
||
|
||
/* Return the size of the clipboard data of format FORMAT. */
|
||
unsigned
|
||
get_clipboard_data_size (unsigned Format)
|
||
{
|
||
__dpmi_regs regs;
|
||
|
||
/* Calls Int 2Fh/AX=1704h with:
|
||
DX = WinOldAp-Supported Clipboard format
|
||
Return Values DX:AX == Size of the data in bytes, including any
|
||
headers.
|
||
== 0 If data in this format is not in
|
||
the clipboard. */
|
||
regs.x.ax = 0x1704;
|
||
regs.x.dx = Format;
|
||
__dpmi_int (0x2f, ®s);
|
||
return ( (((unsigned)regs.x.dx) << 16) | regs.x.ax);
|
||
}
|
||
|
||
/* Get clipboard data, return its length.
|
||
Warning: this doesn't check whether DATA has enough space to hold
|
||
SIZE bytes. */
|
||
unsigned
|
||
get_clipboard_data (unsigned Format, void *Data, unsigned Size, int Raw)
|
||
{
|
||
__dpmi_regs regs;
|
||
unsigned long xbuf_addr;
|
||
unsigned char *dp = Data;
|
||
|
||
if (Format != CF_OEMTEXT)
|
||
return 0;
|
||
|
||
if (Size == 0)
|
||
return 0;
|
||
|
||
if ((xbuf_addr = alloc_xfer_buf (Size)) == 0)
|
||
return 0;
|
||
|
||
/* Calls Int 2Fh/AX=1705h with:
|
||
DX = WinOldAp-Supported Clipboard format
|
||
ES:BX = Pointer to data buffer to hold data
|
||
Return Values AX == 0: Error occurred (or data in this format is not
|
||
in the clipboard)
|
||
<> 0: OK */
|
||
regs.x.ax = 0x1705;
|
||
regs.x.dx = Format;
|
||
regs.x.es = xbuf_addr >> 4;
|
||
regs.x.bx = xbuf_addr & 15;
|
||
__dpmi_int (0x2f, ®s);
|
||
if (regs.x.ax != 0)
|
||
{
|
||
unsigned char null_char = '\0';
|
||
unsigned long xbuf_beg = xbuf_addr;
|
||
|
||
/* If last_clipboard_text is NULL, we don't want to slow down
|
||
the next loop by an additional test. */
|
||
register unsigned char *lcdp =
|
||
last_clipboard_text == NULL ? &null_char : last_clipboard_text;
|
||
|
||
/* Copy data from low memory, remove CR
|
||
characters before LF if needed. */
|
||
_farsetsel (_dos_ds);
|
||
while (Size--)
|
||
{
|
||
register unsigned char c = _farnspeekb (xbuf_addr++);
|
||
|
||
if (*lcdp == c)
|
||
lcdp++;
|
||
|
||
if ((*dp++ = c) == '\r' && !Raw && _farnspeekb (xbuf_addr) == '\n')
|
||
{
|
||
dp--;
|
||
*dp++ = '\n';
|
||
xbuf_addr++;
|
||
if (*lcdp == '\n')
|
||
lcdp++;
|
||
}
|
||
/* Windows reportedly rounds up the size of clipboard data
|
||
(passed in SIZE) to a multiple of 32, and removes trailing
|
||
spaces from each line without updating SIZE. We therefore
|
||
bail out when we see the first null character. */
|
||
else if (c == '\0')
|
||
break;
|
||
}
|
||
|
||
/* If the text in clipboard is identical to what we put there
|
||
last time set_clipboard_data was called, pretend there's no
|
||
data in the clipboard. This is so we don't pass our own text
|
||
from the clipboard (which might be troublesome if the killed
|
||
text includes null characters). */
|
||
if (last_clipboard_text &&
|
||
xbuf_addr - xbuf_beg == (long)(lcdp - last_clipboard_text))
|
||
dp = (unsigned char *)Data + 1;
|
||
}
|
||
|
||
free_xfer_buf ();
|
||
|
||
return (unsigned) (dp - (unsigned char *)Data - 1);
|
||
}
|
||
|
||
/* Close clipboard, return non-zero if successful. */
|
||
unsigned
|
||
close_clipboard (void)
|
||
{
|
||
__dpmi_regs regs;
|
||
|
||
/* Calls Int 2Fh/AX=1708h
|
||
Return Values AX == 0: Error occurred
|
||
<> 0: OK */
|
||
regs.x.ax = 0x1708;
|
||
__dpmi_int (0x2f, ®s);
|
||
return regs.x.ax;
|
||
}
|
||
|
||
/* Compact clipboard data so that at least SIZE bytes is available. */
|
||
unsigned
|
||
clipboard_compact (unsigned Size)
|
||
{
|
||
__dpmi_regs regs;
|
||
|
||
/* Calls Int 2Fh/AX=1709H with:
|
||
SI:CX = Desired memory size in bytes.
|
||
Return Values DX:AX == Number of bytes of largest block of free memory.
|
||
== 0 if error or no memory */
|
||
regs.x.ax = 0x1709;
|
||
regs.x.si = Size >> 16;
|
||
regs.x.cx = Size & 0xffff;
|
||
__dpmi_int (0x2f, ®s);
|
||
return ((unsigned)regs.x.dx << 16) | regs.x.ax;
|
||
}
|
||
|
||
static char no_mem_msg[] =
|
||
"(Not enough DOS memory to put saved text into clipboard.)";
|
||
static char binary_msg[] =
|
||
"(Binary characters in saved text; clipboard data not set.)";
|
||
static char system_error_msg[] =
|
||
"(Clipboard interface failure; clipboard data not set.)";
|
||
|
||
DEFUN ("w16-set-clipboard-data", Fw16_set_clipboard_data, Sw16_set_clipboard_data, 1, 2, 0,
|
||
doc: /* This sets the clipboard data to the given text. */)
|
||
(Lisp_Object string, Lisp_Object frame)
|
||
{
|
||
unsigned ok = 1, put_status = 0;
|
||
int nbytes, no_crlf_conversion;
|
||
unsigned char *src, *dst = NULL;
|
||
|
||
CHECK_STRING (string);
|
||
|
||
if (!FRAME_MSDOS_P (decode_live_frame (frame)))
|
||
goto done;
|
||
|
||
block_input ();
|
||
|
||
if (!open_clipboard ())
|
||
goto error;
|
||
|
||
nbytes = SBYTES (string);
|
||
src = SDATA (string);
|
||
|
||
/* Do we need to encode this text? */
|
||
for (dst = src; dst < src + nbytes; dst++)
|
||
{
|
||
if (*dst == '\0' || *dst >= 0x80)
|
||
break;
|
||
}
|
||
if (dst >= src + nbytes)
|
||
{
|
||
/* No multibyte characters in text. We need not encode it, but we
|
||
will have to convert it to DOS CR-LF style. */
|
||
no_crlf_conversion = 0;
|
||
Vlast_coding_system_used = Qraw_text;
|
||
dst = NULL; /* so we don't try to free a random pointer */
|
||
}
|
||
else
|
||
{
|
||
/* We must encode contents of STRING according to what
|
||
clipboard-coding-system specifies. */
|
||
struct coding_system coding;
|
||
Lisp_Object coding_system =
|
||
NILP (Vnext_selection_coding_system) ?
|
||
Vselection_coding_system : Vnext_selection_coding_system;
|
||
|
||
setup_coding_system (Fcheck_coding_system (coding_system), &coding);
|
||
coding.dst_bytes = nbytes * 4;
|
||
coding.destination = xmalloc (coding.dst_bytes);
|
||
Vnext_selection_coding_system = Qnil;
|
||
coding.mode |= CODING_MODE_LAST_BLOCK;
|
||
dst = coding.destination;
|
||
encode_coding_object (&coding, string, 0, 0,
|
||
SCHARS (string), nbytes, Qnil);
|
||
no_crlf_conversion = 1;
|
||
nbytes = coding.produced;
|
||
Vlast_coding_system_used = CODING_ID_NAME (coding.id);
|
||
src = dst;
|
||
}
|
||
|
||
ok = empty_clipboard ()
|
||
&& ((put_status
|
||
= set_clipboard_data (CF_OEMTEXT, src, nbytes, no_crlf_conversion))
|
||
== 0);
|
||
|
||
if (!no_crlf_conversion)
|
||
close_clipboard ();
|
||
|
||
if (ok) goto unblock;
|
||
|
||
error:
|
||
|
||
ok = 0;
|
||
|
||
unblock:
|
||
xfree (dst);
|
||
unblock_input ();
|
||
|
||
/* Notify user if the text is too large to fit into DOS memory.
|
||
(This will happen somewhere after 600K bytes (470K in DJGPP v1.x),
|
||
depending on user system configuration.) If we just silently
|
||
fail the function, people might wonder why their text sometimes
|
||
doesn't make it to the clipboard. */
|
||
if (put_status)
|
||
{
|
||
switch (put_status)
|
||
{
|
||
case 1:
|
||
message3 (make_unibyte_string (no_mem_msg, sizeof (no_mem_msg) - 1));
|
||
break;
|
||
case 2:
|
||
message3 (make_unibyte_string (binary_msg, sizeof (binary_msg) - 1));
|
||
break;
|
||
case 3:
|
||
message3 (make_unibyte_string (system_error_msg, sizeof (system_error_msg) - 1));
|
||
break;
|
||
}
|
||
sit_for (make_fixnum (2), 0, 2);
|
||
}
|
||
|
||
done:
|
||
|
||
return (ok && put_status == 0 ? string : Qnil);
|
||
}
|
||
|
||
DEFUN ("w16-get-clipboard-data", Fw16_get_clipboard_data, Sw16_get_clipboard_data, 0, 1, 0,
|
||
doc: /* This gets the clipboard data in text format. */)
|
||
(Lisp_Object frame)
|
||
{
|
||
unsigned data_size, truelen;
|
||
unsigned char *htext = NULL;
|
||
Lisp_Object ret = Qnil;
|
||
int require_decoding = 0;
|
||
|
||
if (!FRAME_MSDOS_P (decode_live_frame (frame)))
|
||
goto done;
|
||
|
||
block_input ();
|
||
|
||
if (!open_clipboard ())
|
||
goto unblock;
|
||
|
||
if ((data_size = get_clipboard_data_size (CF_OEMTEXT)) == 0 ||
|
||
(htext = xmalloc (data_size)) == 0)
|
||
goto closeclip;
|
||
|
||
/* need to know final size after '\r' chars are removed because
|
||
we can't change the string size manually, and doing an extra
|
||
copy is silly */
|
||
if ((truelen = get_clipboard_data (CF_OEMTEXT, htext, data_size, 0)) == 0)
|
||
goto closeclip;
|
||
|
||
/* Do we need to decode it? */
|
||
{
|
||
/* If the clipboard data contains any 8-bit Latin-1 code, we
|
||
need to decode it. */
|
||
int i;
|
||
|
||
for (i = 0; i < truelen; i++)
|
||
{
|
||
if (htext[i] >= 0x80)
|
||
{
|
||
require_decoding = 1;
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
if (require_decoding)
|
||
{
|
||
struct coding_system coding;
|
||
Lisp_Object coding_system = Vnext_selection_coding_system;
|
||
|
||
truelen = get_clipboard_data (CF_OEMTEXT, htext, data_size, 1);
|
||
if (NILP (coding_system))
|
||
coding_system = Vselection_coding_system;
|
||
setup_coding_system (Fcheck_coding_system (coding_system), &coding);
|
||
coding.source = htext;
|
||
coding.mode |= CODING_MODE_LAST_BLOCK;
|
||
/* We explicitly disable composition handling because selection
|
||
data should not contain any composition sequence. */
|
||
coding.common_flags &= ~CODING_ANNOTATION_MASK;
|
||
decode_coding_object (&coding, Qnil, 0, 0, truelen, truelen, Qt);
|
||
ret = coding.dst_object;
|
||
Vlast_coding_system_used = CODING_ID_NAME (coding.id);
|
||
}
|
||
else
|
||
{
|
||
ret = make_unibyte_string ((char *) htext, truelen);
|
||
Vlast_coding_system_used = Qraw_text;
|
||
}
|
||
|
||
xfree (htext);
|
||
Vnext_selection_coding_system = Qnil;
|
||
|
||
closeclip:
|
||
close_clipboard ();
|
||
|
||
unblock:
|
||
unblock_input ();
|
||
|
||
done:
|
||
|
||
return (ret);
|
||
}
|
||
|
||
/* Support checking for a clipboard selection. */
|
||
|
||
DEFUN ("w16-selection-exists-p", Fw16_selection_exists_p, Sw16_selection_exists_p,
|
||
0, 2, 0,
|
||
doc: /* Whether there is an owner for the given X selection.
|
||
SELECTION should be the name of the selection in question, typically
|
||
one of the symbols `PRIMARY', `SECONDARY', or `CLIPBOARD'. (X expects
|
||
these literal upper-case names.) The symbol nil is the same as
|
||
`PRIMARY', and t is the same as `SECONDARY'.
|
||
|
||
TERMINAL should be a terminal object or a frame specifying the X
|
||
server to query. If omitted or nil, that stands for the selected
|
||
frame's display, or the first available X display. */)
|
||
(Lisp_Object selection, Lisp_Object terminal)
|
||
{
|
||
CHECK_SYMBOL (selection);
|
||
|
||
/* Return nil for SECONDARY selection. For PRIMARY (or nil)
|
||
selection, check if there is some text on the kill-ring;
|
||
for CLIPBOARD, check if the clipboard currently has valid
|
||
text format contents.
|
||
|
||
The test for killed text on the kill-ring emulates the Emacs
|
||
behavior on X, where killed text is also put into X selection
|
||
by the X interface code. (On MSDOS, killed text is only put
|
||
into the clipboard if we run under Windows, so we cannot check
|
||
the clipboard alone.) */
|
||
if ((NILP (selection) || EQ (selection, QPRIMARY))
|
||
&& ! NILP (Fsymbol_value (Fintern_soft (build_string ("kill-ring"),
|
||
Qnil))))
|
||
return Qt;
|
||
|
||
if (EQ (selection, QCLIPBOARD))
|
||
{
|
||
Lisp_Object val = Qnil;
|
||
|
||
if (open_clipboard ())
|
||
{
|
||
if (get_clipboard_data_size (CF_OEMTEXT))
|
||
val = Qt;
|
||
close_clipboard ();
|
||
}
|
||
return val;
|
||
}
|
||
return Qnil;
|
||
}
|
||
|
||
void
|
||
syms_of_win16select (void)
|
||
{
|
||
defsubr (&Sw16_set_clipboard_data);
|
||
defsubr (&Sw16_get_clipboard_data);
|
||
defsubr (&Sw16_selection_exists_p);
|
||
|
||
DEFVAR_LISP ("selection-coding-system", Vselection_coding_system,
|
||
doc: /* SKIP: real doc in select.el. */);
|
||
Vselection_coding_system = intern ("iso-latin-1-dos");
|
||
|
||
DEFVAR_LISP ("next-selection-coding-system", Vnext_selection_coding_system,
|
||
doc: /* SKIP: real doc in select.el. */);
|
||
Vnext_selection_coding_system = Qnil;
|
||
|
||
DEFSYM (QCLIPBOARD, "CLIPBOARD");
|
||
}
|
||
|
||
#endif /* MSDOS */
|