-/* Win32 Selection processing for emacs
+/* Selection processing for Emacs on the Microsoft W32 API.
Copyright (C) 1993, 1994 Free Software Foundation.
This file is part of GNU Emacs.
#include <config.h>
#include "lisp.h"
-#include "w32term.h" /* for all of the win32 includes */
+#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"
+#include "charset.h"
+#include "coding.h"
+
+Lisp_Object QCLIPBOARD;
+
+/* Coding system for communicating with other Windows programs via the
+ clipboard. */
+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 ("win32-open-clipboard", Fwin32_open_clipboard, Swin32_open_clipboard, 0, 1, 0,
- "This opens the clipboard with the given frame pointer.")
+DEFUN ("w32-open-clipboard", Fw32_open_clipboard, Sw32_open_clipboard, 0, 1, 0,
+ doc: /* This opens the clipboard with the given frame pointer. */)
(frame)
Lisp_Object frame;
{
BOOL ok = FALSE;
if (!NILP (frame))
- CHECK_LIVE_FRAME (frame, 0);
+ CHECK_LIVE_FRAME (frame);
BLOCK_INPUT;
- ok = OpenClipboard ((!NILP (frame) && FRAME_WIN32_P (XFRAME (frame))) ? FRAME_WIN32_WINDOW (XFRAME (frame)) : NULL);
+ ok = OpenClipboard ((!NILP (frame) && FRAME_W32_P (XFRAME (frame))) ? FRAME_W32_WINDOW (XFRAME (frame)) : NULL);
UNBLOCK_INPUT;
return (ok ? frame : Qnil);
}
-DEFUN ("win32-empty-clipboard", Fwin32_empty_clipboard, Swin32_empty_clipboard, 0, 0, 0,
- "This empties the clipboard and assigns ownership to the window which opened the clipboard.")
+DEFUN ("w32-empty-clipboard", Fw32_empty_clipboard,
+ Sw32_empty_clipboard, 0, 0, 0,
+ doc: /* Empty the clipboard.
+Assigns ownership of the clipboard to the window which opened it. */)
()
{
BOOL ok = FALSE;
return (ok ? Qt : Qnil);
}
-DEFUN ("win32-close-clipboard", Fwin32_close_clipboard, Swin32_close_clipboard, 0, 0, 0,
- "This closes the clipboard.")
+DEFUN ("w32-close-clipboard", Fw32_close_clipboard,
+ Sw32_close_clipboard, 0, 0, 0,
+ doc: /* Close the clipboard. */)
()
{
BOOL ok = FALSE;
#endif
-DEFUN ("win32-set-clipboard-data", Fwin32_set_clipboard_data, Swin32_set_clipboard_data, 1, 2, 0,
- "This sets the clipboard data to the given text.")
+DEFUN ("w32-set-clipboard-data", Fw32_set_clipboard_data,
+ Sw32_set_clipboard_data, 1, 2, 0,
+ doc: /* This sets the clipboard data to the given text. */)
(string, frame)
Lisp_Object string, frame;
{
BOOL ok = TRUE;
HANDLE htext;
-
- CHECK_STRING (string, 0);
+ int nbytes;
+ int truelen, nlines = 0;
+ unsigned char *src;
+ unsigned char *dst;
+
+ CHECK_STRING (string);
if (!NILP (frame))
- CHECK_LIVE_FRAME (frame, 0);
+ CHECK_LIVE_FRAME (frame);
BLOCK_INPUT;
-
- /* Allocate twice the amount so we can convert lf to cr-lf */
-
- if ((htext = GlobalAlloc (GMEM_MOVEABLE | GMEM_DDESHARE, (2 * XSTRING (string)->size) + 1)) == NULL)
- goto error;
-
- {
- unsigned char *lptext;
-
- if ((lptext = (unsigned char *)GlobalLock (htext)) == NULL)
- goto error;
-
+
+ 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)
{
- int i = XSTRING (string)->size;
- int newsize = XSTRING (string)->size;
- register char *p1 = XSTRING (string)->data;
- register char *p2 = lptext;
-
- while (i--)
- {
- if (*p1 == '\n')
- {
- newsize++;
- *p2++ = '\r';
- }
-
- *p2++ = *p1++;
- }
-
- *p2 = 0;
+ nlines++;
+ dst++;
}
+
+ {
+ /* Since we are now handling multilingual text, we must consider
+ encoding text for the clipboard. */
+ int charset_info = find_charset_in_text (src, XSTRING (string)->size,
+ nbytes, NULL, Qnil);
+
+ if (charset_info == 0)
+ {
+ /* No multibyte character in OBJ. We need not encode it. */
+
+ /* 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). */
+
+ truelen = nbytes + nlines;
+
+ if ((htext = GlobalAlloc (GMEM_MOVEABLE | GMEM_DDESHARE, truelen)) == NULL)
+ goto error;
+
+ if ((dst = (unsigned char *) GlobalLock (htext)) == NULL)
+ goto error;
- GlobalUnlock (htext);
+ /* convert to CRLF line endings expected by clipboard */
+ while (1)
+ {
+ unsigned char *next;
+ /* copy next line or remaining bytes including '\0' */
+ next = _memccpy (dst, src, '\n', nbytes);
+ if (next)
+ {
+ /* copied one line ending with '\n' */
+ int copied = next - dst;
+ nbytes -= copied;
+ src += copied;
+ /* insert '\r' before '\n' */
+ next[-1] = '\r';
+ next[0] = '\n';
+ dst = next + 1;
+ }
+ else
+ /* copied remaining partial line -> now finished */
+ break;
+ }
+
+ GlobalUnlock (htext);
+
+ Vlast_coding_system_used = Qraw_text;
+ }
+ else
+ {
+ /* 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 (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;
+ if ((dst = (unsigned char *) GlobalLock (htext)) == 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);
+ if (htext2 != NULL) htext = htext2;
+ }
}
- if (!OpenClipboard ((!NILP (frame) && FRAME_WIN32_P (XFRAME (frame))) ? FRAME_WIN32_WINDOW (XFRAME (frame)) : NULL))
+ 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;
return (ok ? string : Qnil);
}
-DEFUN ("win32-get-clipboard-data", Fwin32_get_clipboard_data, Swin32_get_clipboard_data, 0, 1, 0,
- "This gets the clipboard data in text format.")
+DEFUN ("w32-get-clipboard-data", Fw32_get_clipboard_data,
+ Sw32_get_clipboard_data, 0, 1, 0,
+ doc: /* This gets the clipboard data in text format. */)
(frame)
Lisp_Object frame;
{
Lisp_Object ret = Qnil;
if (!NILP (frame))
- CHECK_LIVE_FRAME (frame, 0);
+ CHECK_LIVE_FRAME (frame);
BLOCK_INPUT;
- if (!OpenClipboard ((!NILP (frame) && FRAME_WIN32_P (XFRAME (frame))) ? FRAME_WIN32_WINDOW (XFRAME (frame)) : NULL))
+ if (!OpenClipboard ((!NILP (frame) && FRAME_W32_P (XFRAME (frame))) ? FRAME_W32_WINDOW (XFRAME (frame)) : NULL))
goto done;
if ((htext = GetClipboardData (CF_TEXT)) == NULL)
goto closeclip;
-
{
- unsigned char *lptext;
+ unsigned char *src;
+ unsigned char *dst;
int nbytes;
+ int truelen;
+ int require_decoding = 0;
- if ((lptext = (unsigned char *)GlobalLock (htext)) == NULL)
+ if ((src = (unsigned char *) GlobalLock (htext)) == NULL)
goto closeclip;
- nbytes = strlen (lptext);
-
- {
- char *buf = (char *) xmalloc (nbytes);
- register char *p1 = lptext;
- register char *p2 = buf;
- int i = nbytes;
-
- if (buf == NULL) goto closeclip;
-
- while (i--)
- {
- if (p1[0] == '\r' && i && p1[1] == '\n')
- {
- p1++;
- i--;
- nbytes--;
- }
-
- *p2++ = *p1++;
- }
-
- ret = make_string (buf, nbytes);
-
- xfree (buf);
- }
+ nbytes = strlen (src);
+
+ /* 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 (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;
+ ret = make_string_from_bytes ((char *) buf,
+ coding.produced_char, coding.produced);
+ xfree (buf);
+ }
+ else
+ {
+ /* 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)
+ {
+ 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. */
+
+ dst = XSTRING (ret)->data;
+ while (1)
+ {
+ unsigned char *next;
+ /* copy next line or remaining bytes excluding '\0' */
+ next = _memccpy (dst, src, '\r', nbytes);
+ if (next)
+ {
+ /* copied one line ending with '\r' */
+ int copied = next - dst;
+ nbytes -= copied;
+ dst += copied;
+ src += copied;
+ if (*src == '\n')
+ dst--; /* overwrite '\r' with '\n' */
+ }
+ else
+ /* copied remaining partial line -> now finished */
+ break;
+ }
+
+ Vlast_coding_system_used = Qraw_text;
+ }
+
GlobalUnlock (htext);
}
return (ret);
}
+/* Support checking for a clipboard selection. */
+
+DEFUN ("x-selection-exists-p", Fx_selection_exists_p, Sx_selection_exists_p,
+ 0, 1, 0,
+ doc: /* Whether there is an owner for the given X Selection.
+The arg should be the name of the selection in question, typically one of
+the symbols `PRIMARY', `SECONDARY', or `CLIPBOARD'.
+\(Those are literal upper-case symbol names, since that's what X expects.)
+For convenience, the symbol nil is the same as `PRIMARY',
+and t is the same as `SECONDARY'. */)
+ (selection)
+ Lisp_Object selection;
+{
+ CHECK_SYMBOL (selection);
+
+ /* Return nil for PRIMARY and SECONDARY selections; for CLIPBOARD, check
+ if the clipboard currently has valid text format contents. */
+
+ if (EQ (selection, QCLIPBOARD))
+ {
+ Lisp_Object val = Qnil;
+
+ if (OpenClipboard (NULL))
+ {
+ int format = 0;
+ while (format = EnumClipboardFormats (format))
+ if (format == CF_TEXT)
+ {
+ val = Qt;
+ break;
+ }
+ CloseClipboard ();
+ }
+ return val;
+ }
+ return Qnil;
+}
+
void
-syms_of_win32select ()
+syms_of_w32select ()
{
#if 0
- defsubr (&Swin32_open_clipboard);
- defsubr (&Swin32_empty_clipboard);
- defsubr (&Swin32_close_clipboard);
+ defsubr (&Sw32_open_clipboard);
+ defsubr (&Sw32_empty_clipboard);
+ defsubr (&Sw32_close_clipboard);
#endif
- defsubr (&Swin32_set_clipboard_data);
- defsubr (&Swin32_get_clipboard_data);
+ defsubr (&Sw32_set_clipboard_data);
+ defsubr (&Sw32_get_clipboard_data);
+ defsubr (&Sx_selection_exists_p);
+
+ DEFVAR_LISP ("selection-coding-system", &Vselection_coding_system,
+ doc: /* Coding system for communicating with other programs.
+When sending or receiving text via cut_buffer, selection, and clipboard,
+the text is encoded or decoded by this coding system. */);
+ Vselection_coding_system=intern ("iso-latin-1-dos");
+
+ DEFVAR_LISP ("next-selection-coding-system", &Vnext_selection_coding_system,
+ doc: /* Coding system for the next communication with other programs.
+Usually, `selection-coding-system' is used for communicating with
+other programs. But, if this variable is set, it is used for the
+next communication only. After the communication, this variable is
+set to nil. */);
+ Vnext_selection_coding_system = Qnil;
+
+ QCLIPBOARD = intern ("CLIPBOARD"); staticpro (&QCLIPBOARD);
}
HCoop / bpt / emacs.git / blobdiff