X-Git-Url: https://code.delx.au/gnu-emacs/blobdiff_plain/538d05bb65154e139152fab2c260de219a6d4fe4..d749b6fa2137756b292cf35fceafb80c15e89982:/src/w16select.c diff --git a/src/w16select.c b/src/w16select.c index 6c77190955..b0c30eb58d 100644 --- a/src/w16select.c +++ b/src/w16select.c @@ -1,6 +1,7 @@ /* 16-bit Windows Selection processing for emacs on MS-Windows - Copyright (C) 1996, 1997 Free Software Foundation. - + Copyright (C) 1996, 1997, 2001, 2002, 2003, 2004, + 2005 Free Software Foundation, Inc. + This file is part of GNU Emacs. GNU Emacs is free software; you can redistribute it and/or modify @@ -15,8 +16,8 @@ GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GNU Emacs; see the file COPYING. If not, write to -the Free Software Foundation, Inc., 59 Temple Place - Suite 330, -Boston, MA 02111-1307, USA. */ +the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, +Boston, MA 02110-1301, USA. */ /* These functions work by using WinOldAp interface. WinOldAp (WINOLDAP.MOD) is a Microsoft Windows extension supporting @@ -40,6 +41,7 @@ Boston, MA 02111-1307, USA. */ #include "buffer.h" #include "charset.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 @@ -70,15 +72,28 @@ Lisp_Object QCLIPBOARD, QPRIMARY; /* 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 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; /* Emulation of `__dpmi_int' and friends for DJGPP v1.x */ @@ -155,7 +170,7 @@ unsigned empty_clipboard () { __dpmi_regs regs; - + /* Calls Int 2Fh/AX=1702h Return Values AX == 0: Error occurred <> 0: OK, Clipboard emptied */ @@ -221,7 +236,7 @@ free_xfer_buf () } } -/* Copy data into the clipboard, return non-zero if successfull. */ +/* Copy data into the clipboard, return zero if successfull. */ unsigned set_clipboard_data (Format, Data, Size, Raw) unsigned Format; @@ -235,12 +250,12 @@ set_clipboard_data (Format, Data, Size, Raw) unsigned char *dp = Data, *dstart = dp; if (Format != CF_OEMTEXT) - return 0; + 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; + truelen = Size + 1; /* +1 for the terminating null */ if (!Raw) { @@ -253,14 +268,20 @@ set_clipboard_data (Format, Data, Size, Raw) } if (clipboard_compact (truelen) < truelen) - return 0; + return 1; if ((xbuf_addr = alloc_xfer_buf (truelen)) == 0) - return 0; + return 1; /* Move the buffer into the low memory, convert LF into CR-LF if needed. */ if (Raw) - dosmemput (Data, truelen, __tb); + { + 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; @@ -268,11 +289,31 @@ set_clipboard_data (Format, Data, Size, Raw) _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 = + (char *) 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 @@ -290,7 +331,12 @@ set_clipboard_data (Format, Data, Size, Raw) free_xfer_buf (); - return regs.x.ax; + /* 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. */ @@ -323,7 +369,6 @@ get_clipboard_data (Format, Data, Size, Raw) int Raw; { __dpmi_regs regs; - unsigned datalen = 0; unsigned long xbuf_addr; unsigned char *dp = Data; @@ -349,6 +394,14 @@ get_clipboard_data (Format, Data, Size, Raw) __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); @@ -356,26 +409,38 @@ get_clipboard_data (Format, Data, Size, Raw) { 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. We therefore bail - out when we see the first null character. */ + (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') - { - datalen = dp - (unsigned char *)Data - 1; - break; - } + 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 datalen; + return (unsigned) (dp - (unsigned char *)Data - 1); } /* Close clipboard, return non-zero if successfull. */ @@ -412,43 +477,40 @@ clipboard_compact (Size) 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, - "This sets the clipboard data to the given text.") - (string, frame) - Lisp_Object string, frame; + doc: /* This sets the clipboard data to the given text. */) + (string, frame) + Lisp_Object string, frame; { - int ok = 1, ok1 = 1; - int nbytes; + unsigned ok = 1, put_status = 0; + int nbytes, charset_info, no_crlf_conversion; unsigned char *src, *dst = NULL; - int charsets[MAX_CHARSET + 1]; - int num; - int no_crlf_conversion; - CHECK_STRING (string, 0); - + CHECK_STRING (string); + if (NILP (frame)) frame = Fselected_frame (); - CHECK_LIVE_FRAME (frame, 0); + CHECK_LIVE_FRAME (frame); if ( !FRAME_MSDOS_P (XFRAME (frame))) goto done; - + BLOCK_INPUT; - nbytes = STRING_BYTES (XSTRING (string)) + 1; - src = XSTRING (string)->data; + nbytes = SBYTES (string); + src = SDATA (string); /* Since we are now handling multilingual text, we must consider encoding text for the clipboard. */ + charset_info = find_charset_in_text (src, SCHARS (string), 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, but we will have to convert it to DOS CR-LF style. */ @@ -462,30 +524,46 @@ DEFUN ("w16-set-clipboard-data", Fw16_set_clipboard_data, Sw16_set_clipboard_dat struct coding_system coding; unsigned char *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); + if (SYMBOLP (coding.pre_write_conversion) + && !NILP (Ffboundp (coding.pre_write_conversion))) + { + string = run_pre_post_conversion_on_str (string, &coding, 1); + src = SDATA (string); + nbytes = SBYTES (string); + } + coding.src_multibyte = 1; + coding.dst_multibyte = 0; + Vnext_selection_coding_system = Qnil; coding.mode |= CODING_MODE_LAST_BLOCK; Vlast_coding_system_used = coding.symbol; bufsize = encoding_buffer_size (&coding, nbytes); dst = (unsigned char *) xmalloc (bufsize); encode_coding (&coding, src, dst, nbytes, bufsize); no_crlf_conversion = 1; + nbytes = coding.produced; + src = dst; } if (!open_clipboard ()) goto error; - + ok = empty_clipboard () - && (ok1 = set_clipboard_data (CF_OEMTEXT, src, nbytes, no_crlf_conversion)); + && ((put_status + = set_clipboard_data (CF_OEMTEXT, src, nbytes, no_crlf_conversion)) + == 0); if (!no_crlf_conversion) Vlast_coding_system_used = Qraw_text; close_clipboard (); - + if (ok) goto unblock; error: - + ok = 0; unblock: @@ -498,37 +576,47 @@ DEFUN ("w16-set-clipboard-data", Fw16_set_clipboard_data, Sw16_set_clipboard_dat 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 (ok1 == 0) + if (put_status) { - message2 (no_mem_msg, sizeof (no_mem_msg) - 1, 0); + switch (put_status) + { + case 1: + message2 (no_mem_msg, sizeof (no_mem_msg) - 1, 0); + break; + case 2: + message2 (binary_msg, sizeof (binary_msg) - 1, 0); + break; + case 3: + message2 (system_error_msg, sizeof (system_error_msg) - 1, 0); + break; + } sit_for (2, 0, 0, 1, 1); } - + done: - return (ok ? string : Qnil); + return (ok && put_status == 0 ? string : Qnil); } DEFUN ("w16-get-clipboard-data", Fw16_get_clipboard_data, Sw16_get_clipboard_data, 0, 1, 0, - "This gets the clipboard data in text format.") + doc: /* This gets the clipboard data in text format. */) (frame) Lisp_Object frame; { unsigned data_size, truelen; unsigned char *htext; Lisp_Object ret = Qnil; - int no_crlf_conversion; - int require_encoding = 0; + int no_crlf_conversion, require_encoding = 0; if (NILP (frame)) frame = Fselected_frame (); - CHECK_LIVE_FRAME (frame, 0); + CHECK_LIVE_FRAME (frame); if ( !FRAME_MSDOS_P (XFRAME (frame))) goto done; - + BLOCK_INPUT; - + if (!open_clipboard ()) goto unblock; @@ -543,39 +631,47 @@ DEFUN ("w16-get-clipboard-data", Fw16_get_clipboard_data, Sw16_get_clipboard_dat goto closeclip; /* Do we need to decode it? */ - if (! NILP (buffer_defaults.enable_multibyte_characters)) - { - /* 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_encoding = 1; - break; - } - } - } + { + /* 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_encoding = 1; + break; + } + } + } if (require_encoding) { 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; + /* We explicitely disable composition handling because selection + data should not contain any composition sequence. */ + coding.composing = COMPOSITION_DISABLED; truelen = get_clipboard_data (CF_OEMTEXT, htext, data_size, 1); bufsize = decoding_buffer_size (&coding, truelen); buf = (unsigned char *) xmalloc (bufsize); decode_coding (&coding, htext, buf, truelen, bufsize); - 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); + if (SYMBOLP (coding.post_read_conversion) + && !NILP (Ffboundp (coding.post_read_conversion))) + ret = run_pre_post_conversion_on_str (ret, &coding, 0); Vlast_coding_system_used = coding.symbol; } else @@ -591,26 +687,26 @@ DEFUN ("w16-get-clipboard-data", Fw16_get_clipboard_data, Sw16_get_clipboard_dat unblock: UNBLOCK_INPUT; - + done: - + return (ret); } /* Support checking for a clipboard selection. */ DEFUN ("x-selection-exists-p", Fx_selection_exists_p, Sx_selection_exists_p, - 0, 1, 0, - "Whether there is an owner for the given X Selection.\n\ -The arg should be the name of the selection in question, typically one of\n\ -the symbols `PRIMARY', `SECONDARY', or `CLIPBOARD'.\n\ -\(Those are literal upper-case symbol names, since that's what X expects.)\n\ -For convenience, the symbol nil is the same as `PRIMARY',\n\ -and t is the same as `SECONDARY'.") - (selection) + 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, 0); + CHECK_SYMBOL (selection); /* Return nil for SECONDARY selection. For PRIMARY (or nil) selection, check if there is some text on the kill-ring; @@ -623,8 +719,8 @@ and t is the same as `SECONDARY'.") into the clipboard if we run under Windows, so we cannot check the clipboard alone.) */ if ((EQ (selection, Qnil) || EQ (selection, QPRIMARY)) - && ! NILP (XSYMBOL (Fintern_soft (build_string ("kill-ring"), - Qnil))->value)) + && ! NILP (SYMBOL_VALUE (Fintern_soft (build_string ("kill-ring"), + Qnil)))) return Qt; if (EQ (selection, QCLIPBOARD)) @@ -642,23 +738,33 @@ and t is the same as `SECONDARY'.") return Qnil; } -void +void syms_of_win16select () { defsubr (&Sw16_set_clipboard_data); defsubr (&Sw16_get_clipboard_data); defsubr (&Sx_selection_exists_p); - DEFVAR_LISP ("clipboard-coding-system", &Vclipboard_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 `iso-latin-1-dos'"); - Vclipboard_coding_system=intern ("iso-latin-1-dos"); - staticpro(&Vclipboard_coding_system); + DEFVAR_LISP ("selection-coding-system", &Vselection_coding_system, + doc: /* Coding system for communicating with other X clients. +When sending or receiving text via cut_buffer, selection, and clipboard, +the text is encoded or decoded by this coding system. +The default value is `iso-latin-1-dos'. */); + 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 X clients. +Usually, `selection-coding-system' is used for communicating with +other X clients. 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; QPRIMARY = intern ("PRIMARY"); staticpro (&QPRIMARY); QCLIPBOARD = intern ("CLIPBOARD"); staticpro (&QCLIPBOARD); } #endif /* MSDOS */ + +/* arch-tag: 085a22c8-7324-436e-a6da-102464ce95d8 + (do not change this comment) */