#include "lisp.h"
#include "w32term.h" /* for all of the w32 includes */
#include "dispextern.h" /* frame.h seems to want this */
+#include "keyboard.h"
#include "frame.h" /* Need this to get the X window of selected_frame */
#include "blockinput.h"
#include "buffer.h"
/* Coding system for communicating with other Windows programs via the
clipboard. */
-static Lisp_Object Vclipboard_coding_system;
+static Lisp_Object Vselection_coding_system;
+
+/* Coding system for the next communicating with other Windows programs. */
+static Lisp_Object Vnext_selection_coding_system;
+
+/* 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 = NULL;
+static size_t clipboard_storage_size = 0;
#if 0
DEFUN ("w32-open-clipboard", Fw32_open_clipboard, Sw32_open_clipboard, 0, 1, 0,
BOOL ok = TRUE;
HANDLE htext;
int nbytes;
- int truelen;
+ int truelen, nlines = 0;
unsigned char *src;
unsigned char *dst;
-
+
CHECK_STRING (string, 0);
if (!NILP (frame))
nbytes = STRING_BYTES (XSTRING (string)) + 1;
src = XSTRING (string)->data;
+ dst = src;
+
+ /* We need to know how many lines there are, since we need CRLF line
+ termination for compatibility with other Windows Programs.
+ avoid using strchr because it recomputes the length every time */
+ while ((dst = memchr (dst, '\n', nbytes - (dst - src))) != NULL)
+ {
+ nlines++;
+ dst++;
+ }
{
/* Since we are now handling multilingual text, we must consider
encoding text for the clipboard. */
- int charsets[MAX_CHARSET + 1];
- int num;
+ int charset_info = find_charset_in_text (src, XSTRING (string)->size,
+ nbytes, NULL, Qnil);
- bzero (charsets, (MAX_CHARSET + 1) * sizeof (int));
- num = ((nbytes <= 2 /* Check the possibility of short cut. */
- || NILP (buffer_defaults.enable_multibyte_characters))
- ? 0
- : find_charset_in_str (src, nbytes, charsets, Qnil, 1));
-
- if (!num || (num == 1 && charsets[CHARSET_ASCII]))
+ if (charset_info == 0)
{
/* No multibyte character in OBJ. We need not encode it. */
- /* need to know final size after '\r' chars are inserted (the
+ /* Need to know final size after CR chars are inserted (the
standard CF_TEXT clipboard format uses CRLF line endings,
- while Emacs uses just LF internally) */
+ while Emacs uses just LF internally). */
- truelen = nbytes;
- dst = src;
- /* avoid using strchr because it recomputes the length everytime */
- while ((dst = memchr (dst, '\n', nbytes - (dst - src))) != NULL)
- {
- truelen++;
- dst++;
- }
+ truelen = nbytes + nlines;
if ((htext = GlobalAlloc (GMEM_MOVEABLE | GMEM_DDESHARE, truelen)) == NULL)
goto error;
}
else
{
- /* We must encode contents of OBJ to compound text format.
- The format is compatible with what the target `STRING'
- expects if OBJ contains only ASCII and Latin-1
- characters. */
+ /* We must encode contents of OBJ to the selection coding
+ system. */
int bufsize;
struct coding_system coding;
HANDLE htext2;
+ if (NILP (Vnext_selection_coding_system))
+ Vnext_selection_coding_system = Vselection_coding_system;
setup_coding_system
- (Fcheck_coding_system (Vclipboard_coding_system), &coding);
+ (Fcheck_coding_system (Vnext_selection_coding_system), &coding);
+ coding.src_multibyte = 1;
+ coding.dst_multibyte = 0;
+ Vnext_selection_coding_system = Qnil;
coding.mode |= CODING_MODE_LAST_BLOCK;
bufsize = encoding_buffer_size (&coding, nbytes);
if ((htext = GlobalAlloc (GMEM_MOVEABLE | GMEM_DDESHARE, bufsize)) == NULL)
goto error;
encode_coding (&coding, src, dst, nbytes, bufsize);
Vlast_coding_system_used = coding.symbol;
+
+ /* Stash away the data we are about to put into the clipboard, so we
+ could later check inside Fw32_get_clipboard_data whether
+ the clipboard still holds our data. */
+ if (clipboard_storage_size < coding.produced)
+ {
+ clipboard_storage_size = coding.produced + 100;
+ last_clipboard_text = (char *) xrealloc (last_clipboard_text,
+ clipboard_storage_size);
+ }
+ if (last_clipboard_text)
+ memcpy (last_clipboard_text, dst, coding.produced);
+
GlobalUnlock (htext);
+
/* Shrink data block to actual size. */
- htext2 = GlobalReAlloc (htext, coding.produced, GMEM_MOVEABLE | GMEM_DDESHARE);
+ htext2 = GlobalReAlloc (htext, coding.produced,
+ GMEM_MOVEABLE | GMEM_DDESHARE);
if (htext2 != NULL) htext = htext2;
}
}
if (!OpenClipboard ((!NILP (frame) && FRAME_W32_P (XFRAME (frame))) ? FRAME_W32_WINDOW (XFRAME (frame)) : NULL))
goto error;
-
+
ok = EmptyClipboard () && SetClipboardData (CF_TEXT, htext);
CloseClipboard ();
ok = FALSE;
if (htext) GlobalFree (htext);
-
+ if (last_clipboard_text)
+ *last_clipboard_text = '\0';
+
done:
UNBLOCK_INPUT;
unsigned char *dst;
int nbytes;
int truelen;
+ int require_decoding = 0;
if ((src = (unsigned char *) GlobalLock (htext)) == NULL)
goto closeclip;
nbytes = strlen (src);
- if (! NILP (buffer_defaults.enable_multibyte_characters))
+ /* If the text in clipboard is identical to what we put there
+ last time w32_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
+ && clipboard_storage_size >= nbytes
+ && memcmp(last_clipboard_text, src, nbytes) == 0)
+ goto closeclip;
+
+ if (
+#if 1
+ 1
+#else
+ ! NILP (buffer_defaults.enable_multibyte_characters)
+#endif
+ )
+ {
+ /* If the clipboard data contains any non-ascii code, we
+ need to decode it. */
+ int i;
+
+ for (i = 0; i < nbytes; i++)
+ {
+ if (src[i] >= 0x80)
+ {
+ require_decoding = 1;
+ break;
+ }
+ }
+ }
+
+ if (require_decoding)
{
int bufsize;
unsigned char *buf;
struct coding_system coding;
+ if (NILP (Vnext_selection_coding_system))
+ Vnext_selection_coding_system = Vselection_coding_system;
setup_coding_system
- (Fcheck_coding_system(Vclipboard_coding_system), &coding);
+ (Fcheck_coding_system (Vnext_selection_coding_system), &coding);
+ coding.src_multibyte = 0;
+ coding.dst_multibyte = 1;
+ Vnext_selection_coding_system = Qnil;
coding.mode |= CODING_MODE_LAST_BLOCK;
bufsize = decoding_buffer_size (&coding, nbytes);
buf = (unsigned char *) xmalloc (bufsize);
decode_coding (&coding, src, buf, nbytes, bufsize);
Vlast_coding_system_used = coding.symbol;
- truelen = (coding.fake_multibyte
- ? multibyte_chars_in_text (buf, coding.produced)
- : coding.produced_char);
- ret = make_string_from_bytes ((char *) buf, truelen, coding.produced);
+ ret = make_string_from_bytes ((char *) buf,
+ coding.produced_char, coding.produced);
xfree (buf);
}
else
{
- /* 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 */
+ /* Need to know final size after CR chars are removed because we
+ can't change the string size manually, and doing an extra
+ copy is silly. Note that we only remove CR when it appears
+ as part of CRLF. */
truelen = nbytes;
dst = src;
/* avoid using strchr because it recomputes the length everytime */
while ((dst = memchr (dst, '\r', nbytes - (dst - src))) != NULL)
{
- truelen--;
+ if (dst[1] == '\n') /* safe because of trailing '\0' */
+ truelen--;
dst++;
}
ret = make_uninit_string (truelen);
- /* convert CRLF line endings (the standard CF_TEXT clipboard
- format) to LF endings as used internally by Emacs */
+ /* Convert CRLF line endings (the standard CF_TEXT clipboard
+ format) to LF endings as used internally by Emacs. */
dst = XSTRING (ret)->data;
while (1)
/* copied one line ending with '\r' */
int copied = next - dst;
nbytes -= copied;
- dst += copied - 1; /* overwrite '\r' */
+ dst += copied;
src += copied;
- }
+ if (*src == '\n')
+ dst--; /* overwrite '\r' with '\n' */
+ }
else
/* copied remaining partial line -> now finished */
break;
defsubr (&Sw32_get_clipboard_data);
defsubr (&Sx_selection_exists_p);
- DEFVAR_LISP ("clipboard-coding-system", &Vclipboard_coding_system,
+ DEFVAR_LISP ("selection-coding-system", &Vselection_coding_system,
"Coding system for communicating with other X clients.\n\
When sending or receiving text via cut_buffer, selection, and clipboard,\n\
the text is encoded or decoded by this coding system.\n\
A default value is `compound-text'");
- Vclipboard_coding_system=intern ("iso-latin-1-dos");
- staticpro(&Vclipboard_coding_system);
+ Vselection_coding_system=intern ("iso-latin-1-dos");
+
+ DEFVAR_LISP ("next-selection-coding-system", &Vnext_selection_coding_system,
+ "Coding system for the next communication with other X clients.\n\
+Usually, `selection-coding-system' is used for communicating with\n\
+other X clients. But, if this variable is set, it is used for the\n\
+next communication only. After the communication, this variable is\n\
+set to nil.");
+ Vnext_selection_coding_system = Qnil;
QCLIPBOARD = intern ("CLIPBOARD"); staticpro (&QCLIPBOARD);
}