Commit | Line | Data |
---|---|---|
767079a8 | 1 | /* 16-bit Windows Selection processing for emacs on MS-Windows |
21cfcccf EZ |
2 | Copyright (C) 1996, 1997 Free Software Foundation. |
3 | ||
4 | This file is part of GNU Emacs. | |
5 | ||
6 | GNU Emacs is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2, or (at your option) | |
9 | any later version. | |
10 | ||
11 | GNU Emacs is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GNU Emacs; see the file COPYING. If not, write to | |
18 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
19 | Boston, MA 02111-1307, USA. */ | |
20 | ||
21 | /* These functions work by using WinOldAp interface. WinOldAp | |
22 | (WINOLDAP.MOD) is a Microsoft Windows extension supporting | |
23 | "old" (character-mode) application access to Dynamic Data Exchange, | |
24 | menus, and the Windows clipboard. */ | |
25 | ||
26 | /* Written by Dale P. Smith <dpsm@en.com> */ | |
27 | /* Adapted to DJGPP v1 by Eli Zaretskii <eliz@is.elta.co.il> */ | |
28 | ||
29 | #ifdef MSDOS | |
30 | ||
31 | #include <config.h> | |
32 | #include <string.h> | |
33 | #include <dpmi.h> | |
34 | #include <go32.h> | |
35 | #include <sys/farptr.h> | |
36 | #include "lisp.h" | |
37 | #include "dispextern.h" /* frame.h seems to want this */ | |
38 | #include "frame.h" /* Need this to get the X window of selected_frame */ | |
39 | #include "blockinput.h" | |
583f5d53 EZ |
40 | #include "buffer.h" |
41 | #include "charset.h" | |
42 | #include "coding.h" | |
21cfcccf EZ |
43 | |
44 | /* If ever some function outside this file will need to call any | |
45 | clipboard-related function, the following prototypes and constants | |
46 | should be put on a header file. Right now, nobody else uses them. */ | |
47 | ||
48 | #define CF_TEXT 0x01 | |
49 | #define CF_BITMAP 0x02 | |
50 | #define CF_METAFILE 0x03 | |
51 | #define CF_SYLK 0x04 | |
52 | #define CF_DIF 0x05 | |
53 | #define CF_TIFF 0x06 | |
54 | #define CF_OEMTEXT 0x07 | |
55 | #define CF_DIBBITMAP 0x08 | |
56 | #define CF_WINWRITE 0x80 | |
57 | #define CF_DSPTEXT 0x81 | |
58 | #define CF_DSPBITMAP 0x82 | |
59 | ||
60 | unsigned identify_winoldap_version (void); | |
61 | unsigned open_clipboard (void); | |
62 | unsigned empty_clipboard (void); | |
583f5d53 | 63 | unsigned set_clipboard_data (unsigned, void *, unsigned, int); |
21cfcccf | 64 | unsigned get_clipboard_data_size (unsigned); |
583f5d53 | 65 | unsigned get_clipboard_data (unsigned, void *, unsigned, int); |
21cfcccf EZ |
66 | unsigned close_clipboard (void); |
67 | unsigned clipboard_compact (unsigned); | |
68 | ||
69 | Lisp_Object QCLIPBOARD, QPRIMARY; | |
70 | ||
583f5d53 EZ |
71 | /* Coding system for communicating with other Windows programs via the |
72 | clipboard. */ | |
199c7c44 | 73 | static Lisp_Object Vselection_coding_system; |
583f5d53 | 74 | |
9963e859 EZ |
75 | /* Coding system for the next communicating with other Windows programs. */ |
76 | static Lisp_Object Vnext_selection_coding_system; | |
77 | ||
21cfcccf EZ |
78 | /* The segment address and the size of the buffer in low |
79 | memory used to move data between us and WinOldAp module. */ | |
80 | ||
81 | static struct { | |
82 | unsigned long size; | |
83 | unsigned short rm_segment; | |
84 | } clipboard_xfer_buf_info; | |
85 | \f | |
86 | /* Emulation of `__dpmi_int' and friends for DJGPP v1.x */ | |
87 | ||
88 | #if __DJGPP__ < 2 | |
89 | ||
90 | typedef _go32_dpmi_registers __dpmi_regs; | |
91 | #define __tb _go32_info_block.linear_address_of_transfer_buffer | |
92 | #define _dos_ds _go32_info_block.selector_for_linear_memory | |
93 | ||
94 | static int | |
95 | __dpmi_int (intno, regs) | |
96 | int intno; | |
97 | __dpmi_regs *regs; | |
98 | { | |
99 | regs->x.ss = regs->x.sp = regs->x.flags = 0; | |
100 | return _go32_dpmi_simulate_int (intno, regs); | |
101 | } | |
102 | ||
103 | #endif /* __DJGPP__ < 2 */ | |
104 | \f | |
105 | /* C functions to access the Windows 3.1x clipboard from DOS apps. | |
106 | ||
107 | The information was obtained from the Microsoft Knowledge Base, | |
108 | article Q67675 and can be found at: | |
109 | http://www.microsoft.com/kb/developr/win_dk/q67675.htm */ | |
110 | ||
111 | /* See also Ralf Brown's Interrupt List. | |
112 | ||
113 | I also seem to remember reading about this in Dr. Dobbs Journal a | |
114 | while ago, but if you knew my memory... :-) | |
115 | ||
116 | Dale P. Smith <dpsm@en.com> */ | |
117 | ||
118 | /* Return the WinOldAp support version, or 0x1700 if not supported. */ | |
119 | unsigned | |
120 | identify_winoldap_version () | |
121 | { | |
122 | __dpmi_regs regs; | |
123 | ||
124 | /* Calls Int 2Fh/AX=1700h | |
125 | Return Values AX == 1700H: Clipboard functions not available | |
126 | <> 1700H: AL = Major version number | |
127 | AH = Minor version number */ | |
128 | regs.x.ax = 0x1700; | |
129 | __dpmi_int(0x2f, ®s); | |
130 | return regs.x.ax; | |
131 | } | |
132 | ||
133 | /* Open the clipboard, return non-zero if successfull. */ | |
134 | unsigned | |
135 | open_clipboard () | |
136 | { | |
137 | __dpmi_regs regs; | |
138 | ||
139 | /* Is WINOLDAP supported? */ | |
140 | /* Kludge alert!! If WinOldAp is not supported, we return a 0, | |
141 | which is the same as ``Clipboard already open''. Currently, | |
142 | this is taken as an error by all the functions that use | |
143 | `open_clipboard', but if somebody someday will use that ``open'' | |
144 | clipboard, they will have interesting time debugging it... */ | |
145 | if (identify_winoldap_version () == 0x1700) | |
146 | return 0; | |
147 | ||
148 | /* Calls Int 2Fh/AX=1701h | |
149 | Return Values AX == 0: Clipboard already open | |
150 | <> 0: Clipboard opened */ | |
151 | regs.x.ax = 0x1701; | |
152 | __dpmi_int(0x2f, ®s); | |
153 | return regs.x.ax; | |
154 | } | |
155 | ||
156 | /* Empty clipboard, return non-zero if successfull. */ | |
157 | unsigned | |
158 | empty_clipboard () | |
159 | { | |
160 | __dpmi_regs regs; | |
161 | ||
162 | /* Calls Int 2Fh/AX=1702h | |
163 | Return Values AX == 0: Error occurred | |
164 | <> 0: OK, Clipboard emptied */ | |
165 | regs.x.ax = 0x1702; | |
166 | __dpmi_int(0x2f, ®s); | |
167 | return regs.x.ax; | |
168 | } | |
169 | ||
170 | /* Ensure we have a buffer in low memory with enough memory for data | |
171 | of size WANT_SIZE. Return the linear address of the buffer. */ | |
172 | static unsigned long | |
173 | alloc_xfer_buf (want_size) | |
174 | unsigned want_size; | |
175 | { | |
176 | __dpmi_regs regs; | |
177 | ||
178 | /* If the usual DJGPP transfer buffer is large enough, use that. */ | |
179 | if (want_size <= _go32_info_block.size_of_transfer_buffer) | |
180 | return __tb & 0xfffff; | |
181 | ||
767079a8 EZ |
182 | /* Don't even try to allocate more than 1MB of memory: DOS cannot |
183 | possibly handle that (it will overflow the BX register below). */ | |
184 | if (want_size > 0xfffff) | |
185 | return 0; | |
186 | ||
21cfcccf EZ |
187 | /* Need size rounded up to the nearest paragraph, and in |
188 | paragraph units (1 paragraph = 16 bytes). */ | |
189 | clipboard_xfer_buf_info.size = (want_size + 15) >> 4; | |
190 | ||
191 | /* The NT DPMI host crashes us if we free DOS memory via the | |
192 | DPMI service. Work around by calling DOS allocate/free block. */ | |
193 | regs.h.ah = 0x48; | |
194 | regs.x.bx = clipboard_xfer_buf_info.size; | |
195 | __dpmi_int (0x21, ®s); | |
196 | if (regs.x.flags & 1) | |
197 | { | |
198 | clipboard_xfer_buf_info.size = 0; | |
199 | return 0; | |
200 | } | |
201 | ||
202 | clipboard_xfer_buf_info.rm_segment = regs.x.ax; | |
203 | return (((int)clipboard_xfer_buf_info.rm_segment) << 4) & 0xfffff; | |
204 | } | |
205 | ||
206 | /* Free our clipboard buffer. We always free it after use, because | |
207 | keeping it leaves less free conventional memory for subprocesses. | |
208 | The clipboard buffer tends to be large in size, because for small | |
209 | clipboard data sizes we use the DJGPP transfer buffer. */ | |
210 | static void | |
211 | free_xfer_buf () | |
212 | { | |
213 | /* If the size is 0, we used DJGPP transfer buffer, so don't free. */ | |
214 | if (clipboard_xfer_buf_info.size) | |
215 | { | |
216 | __dpmi_regs regs; | |
217 | ||
218 | /* The NT DPMI host crashes us if we free DOS memory via | |
219 | the DPMI service. Work around by calling DOS free block. */ | |
220 | regs.h.ah = 0x49; | |
221 | regs.x.es = clipboard_xfer_buf_info.rm_segment; | |
222 | __dpmi_int (0x21, ®s); | |
223 | clipboard_xfer_buf_info.size = 0; | |
224 | } | |
225 | } | |
226 | ||
227 | /* Copy data into the clipboard, return non-zero if successfull. */ | |
228 | unsigned | |
583f5d53 | 229 | set_clipboard_data (Format, Data, Size, Raw) |
21cfcccf EZ |
230 | unsigned Format; |
231 | void *Data; | |
232 | unsigned Size; | |
583f5d53 | 233 | int Raw; |
21cfcccf EZ |
234 | { |
235 | __dpmi_regs regs; | |
236 | unsigned truelen; | |
237 | unsigned long xbuf_addr, buf_offset; | |
238 | unsigned char *dp = Data, *dstart = dp; | |
239 | ||
538d05bb | 240 | if (Format != CF_OEMTEXT) |
21cfcccf EZ |
241 | return 0; |
242 | ||
243 | /* need to know final size after '\r' chars are inserted (the | |
538d05bb | 244 | standard CF_OEMTEXT clipboard format uses CRLF line endings, |
21cfcccf EZ |
245 | while Emacs uses just LF internally). */ |
246 | truelen = Size; | |
583f5d53 EZ |
247 | |
248 | if (!Raw) | |
21cfcccf | 249 | { |
583f5d53 EZ |
250 | /* avoid using strchr because it recomputes the length everytime */ |
251 | while ((dp = memchr (dp, '\n', Size - (dp - dstart))) != 0) | |
252 | { | |
253 | truelen++; | |
254 | dp++; | |
255 | } | |
21cfcccf EZ |
256 | } |
257 | ||
258 | if (clipboard_compact (truelen) < truelen) | |
259 | return 0; | |
260 | ||
261 | if ((xbuf_addr = alloc_xfer_buf (truelen)) == 0) | |
262 | return 0; | |
263 | ||
583f5d53 EZ |
264 | /* Move the buffer into the low memory, convert LF into CR-LF if needed. */ |
265 | if (Raw) | |
266 | dosmemput (Data, truelen, __tb); | |
267 | else | |
21cfcccf | 268 | { |
583f5d53 EZ |
269 | dp = Data; |
270 | buf_offset = xbuf_addr; | |
271 | _farsetsel (_dos_ds); | |
272 | while (Size--) | |
273 | { | |
274 | if (*dp == '\n') | |
275 | _farnspokeb (buf_offset++, '\r'); | |
276 | _farnspokeb (buf_offset++, *dp++); | |
277 | } | |
21cfcccf EZ |
278 | } |
279 | ||
280 | /* Calls Int 2Fh/AX=1703h with: | |
281 | DX = WinOldAp-Supported Clipboard format | |
282 | ES:BX = Pointer to data | |
283 | SI:CX = Size of data in bytes | |
284 | Return Values AX == 0: Error occurred | |
285 | <> 0: OK. Data copied into the Clipboard. */ | |
286 | regs.x.ax = 0x1703; | |
287 | regs.x.dx = Format; | |
288 | regs.x.si = truelen >> 16; | |
289 | regs.x.cx = truelen & 0xffff; | |
290 | regs.x.es = xbuf_addr >> 4; | |
291 | regs.x.bx = xbuf_addr & 15; | |
292 | __dpmi_int(0x2f, ®s); | |
293 | ||
294 | free_xfer_buf (); | |
295 | ||
296 | return regs.x.ax; | |
297 | } | |
298 | ||
299 | /* Return the size of the clipboard data of format FORMAT. */ | |
300 | unsigned | |
301 | get_clipboard_data_size (Format) | |
302 | unsigned Format; | |
303 | { | |
304 | __dpmi_regs regs; | |
305 | ||
306 | /* Calls Int 2Fh/AX=1704h with: | |
307 | DX = WinOldAp-Supported Clipboard format | |
308 | Return Values DX:AX == Size of the data in bytes, including any | |
309 | headers. | |
310 | == 0 If data in this format is not in | |
311 | the clipboard. */ | |
312 | regs.x.ax = 0x1704; | |
313 | regs.x.dx = Format; | |
314 | __dpmi_int(0x2f, ®s); | |
315 | return ( (((unsigned)regs.x.dx) << 16) | regs.x.ax); | |
316 | } | |
317 | ||
318 | /* Get clipboard data, return its length. | |
319 | Warning: this doesn't check whether DATA has enough space to hold | |
320 | SIZE bytes. */ | |
321 | unsigned | |
583f5d53 | 322 | get_clipboard_data (Format, Data, Size, Raw) |
21cfcccf EZ |
323 | unsigned Format; |
324 | void *Data; | |
325 | unsigned Size; | |
583f5d53 | 326 | int Raw; |
21cfcccf EZ |
327 | { |
328 | __dpmi_regs regs; | |
329 | unsigned datalen = 0; | |
330 | unsigned long xbuf_addr; | |
331 | unsigned char *dp = Data; | |
332 | ||
538d05bb | 333 | if (Format != CF_OEMTEXT) |
21cfcccf EZ |
334 | return 0; |
335 | ||
336 | if (Size == 0) | |
337 | return 0; | |
338 | ||
339 | if ((xbuf_addr = alloc_xfer_buf (Size)) == 0) | |
340 | return 0; | |
341 | ||
342 | /* Calls Int 2Fh/AX=1705h with: | |
343 | DX = WinOldAp-Supported Clipboard format | |
344 | ES:BX = Pointer to data buffer to hold data | |
345 | Return Values AX == 0: Error occurred (or data in this format is not | |
346 | in the clipboard) | |
347 | <> 0: OK */ | |
348 | regs.x.ax = 0x1705; | |
349 | regs.x.dx = Format; | |
350 | regs.x.es = xbuf_addr >> 4; | |
351 | regs.x.bx = xbuf_addr & 15; | |
352 | __dpmi_int(0x2f, ®s); | |
353 | if (regs.x.ax != 0) | |
354 | { | |
583f5d53 EZ |
355 | /* Copy data from low memory, remove CR |
356 | characters before LF if needed. */ | |
21cfcccf EZ |
357 | _farsetsel (_dos_ds); |
358 | while (Size--) | |
359 | { | |
360 | register unsigned char c = _farnspeekb (xbuf_addr++); | |
361 | ||
583f5d53 | 362 | if ((*dp++ = c) == '\r' && !Raw && _farnspeekb (xbuf_addr) == '\n') |
21cfcccf EZ |
363 | { |
364 | dp--; | |
365 | *dp++ = '\n'; | |
366 | xbuf_addr++; | |
367 | } | |
368 | /* Windows reportedly rounds up the size of clipboard data | |
369 | (passed in SIZE) to a multiple of 32. We therefore bail | |
370 | out when we see the first null character. */ | |
371 | else if (c == '\0') | |
372 | { | |
373 | datalen = dp - (unsigned char *)Data - 1; | |
374 | break; | |
375 | } | |
376 | } | |
377 | } | |
378 | ||
379 | free_xfer_buf (); | |
380 | ||
381 | return datalen; | |
382 | } | |
383 | ||
384 | /* Close clipboard, return non-zero if successfull. */ | |
385 | unsigned | |
386 | close_clipboard () | |
387 | { | |
388 | __dpmi_regs regs; | |
389 | ||
390 | /* Calls Int 2Fh/AX=1708h | |
391 | Return Values AX == 0: Error occurred | |
392 | <> 0: OK */ | |
393 | regs.x.ax = 0x1708; | |
394 | __dpmi_int(0x2f, ®s); | |
395 | return regs.x.ax; | |
396 | } | |
397 | ||
398 | /* Compact clipboard data so that at least SIZE bytes is available. */ | |
399 | unsigned | |
400 | clipboard_compact (Size) | |
401 | unsigned Size; | |
402 | { | |
403 | __dpmi_regs regs; | |
404 | ||
405 | /* Calls Int 2Fh/AX=1709H with: | |
406 | SI:CX = Desired memory size in bytes. | |
407 | Return Values DX:AX == Number of bytes of largest block of free memory. | |
408 | == 0 if error or no memory */ | |
409 | regs.x.ax = 0x1709; | |
410 | regs.x.si = Size >> 16; | |
411 | regs.x.cx = Size & 0xffff; | |
412 | __dpmi_int(0x2f, ®s); | |
413 | return ((unsigned)regs.x.dx << 16) | regs.x.ax; | |
414 | } | |
415 | \f | |
416 | static char no_mem_msg[] = | |
417 | "(Not enough DOS memory to put saved text into clipboard.)"; | |
418 | ||
767079a8 | 419 | DEFUN ("w16-set-clipboard-data", Fw16_set_clipboard_data, Sw16_set_clipboard_data, 1, 2, 0, |
21cfcccf EZ |
420 | "This sets the clipboard data to the given text.") |
421 | (string, frame) | |
422 | Lisp_Object string, frame; | |
423 | { | |
424 | int ok = 1, ok1 = 1; | |
425 | int nbytes; | |
583f5d53 EZ |
426 | unsigned char *src, *dst = NULL; |
427 | int charsets[MAX_CHARSET + 1]; | |
428 | int num; | |
429 | int no_crlf_conversion; | |
21cfcccf EZ |
430 | |
431 | CHECK_STRING (string, 0); | |
432 | ||
433 | if (NILP (frame)) | |
434 | frame = Fselected_frame (); | |
435 | ||
436 | CHECK_LIVE_FRAME (frame, 0); | |
437 | if ( !FRAME_MSDOS_P (XFRAME (frame))) | |
438 | goto done; | |
439 | ||
440 | BLOCK_INPUT; | |
441 | ||
199c7c44 | 442 | nbytes = STRING_BYTES (XSTRING (string)); |
21cfcccf | 443 | src = XSTRING (string)->data; |
583f5d53 EZ |
444 | |
445 | /* Since we are now handling multilingual text, we must consider | |
446 | encoding text for the clipboard. */ | |
583f5d53 | 447 | bzero (charsets, (MAX_CHARSET + 1) * sizeof (int)); |
199c7c44 | 448 | num = ((nbytes <= 1 /* Check the possibility of short cut. */ |
9963e859 EZ |
449 | || !STRING_MULTIBYTE (string) |
450 | || nbytes == XSTRING (string)->size) | |
583f5d53 EZ |
451 | ? 0 |
452 | : find_charset_in_str (src, nbytes, charsets, Qnil, 1)); | |
453 | ||
454 | if (!num || (num == 1 && charsets[CHARSET_ASCII])) | |
455 | { | |
456 | /* No multibyte character in OBJ. We need not encode it, but we | |
457 | will have to convert it to DOS CR-LF style. */ | |
458 | no_crlf_conversion = 0; | |
459 | } | |
460 | else | |
461 | { | |
462 | /* We must encode contents of STRING according to what | |
463 | clipboard-coding-system specifies. */ | |
464 | int bufsize; | |
465 | struct coding_system coding; | |
466 | unsigned char *htext2; | |
467 | ||
9963e859 EZ |
468 | if (NILP (Vnext_selection_coding_system)) |
469 | Vnext_selection_coding_system = Vselection_coding_system; | |
583f5d53 | 470 | setup_coding_system |
9963e859 EZ |
471 | (Fcheck_coding_system (Vnext_selection_coding_system), &coding); |
472 | Vnext_selection_coding_system = Qnil; | |
583f5d53 EZ |
473 | coding.mode |= CODING_MODE_LAST_BLOCK; |
474 | Vlast_coding_system_used = coding.symbol; | |
475 | bufsize = encoding_buffer_size (&coding, nbytes); | |
476 | dst = (unsigned char *) xmalloc (bufsize); | |
477 | encode_coding (&coding, src, dst, nbytes, bufsize); | |
478 | no_crlf_conversion = 1; | |
479 | } | |
480 | ||
21cfcccf EZ |
481 | if (!open_clipboard ()) |
482 | goto error; | |
483 | ||
583f5d53 | 484 | ok = empty_clipboard () |
538d05bb | 485 | && (ok1 = set_clipboard_data (CF_OEMTEXT, src, nbytes, no_crlf_conversion)); |
583f5d53 EZ |
486 | |
487 | if (!no_crlf_conversion) | |
488 | Vlast_coding_system_used = Qraw_text; | |
21cfcccf EZ |
489 | close_clipboard (); |
490 | ||
31354c30 | 491 | if (ok) goto unblock; |
21cfcccf EZ |
492 | |
493 | error: | |
494 | ||
495 | ok = 0; | |
496 | ||
31354c30 | 497 | unblock: |
583f5d53 EZ |
498 | if (dst) |
499 | xfree (dst); | |
31354c30 EZ |
500 | UNBLOCK_INPUT; |
501 | ||
21cfcccf EZ |
502 | /* Notify user if the text is too large to fit into DOS memory. |
503 | (This will happen somewhere after 600K bytes (470K in DJGPP v1.x), | |
504 | depending on user system configuration.) If we just silently | |
505 | fail the function, people might wonder why their text sometimes | |
506 | doesn't make it to the clipboard. */ | |
507 | if (ok1 == 0) | |
508 | { | |
a63f12f9 | 509 | message2 (no_mem_msg, sizeof (no_mem_msg) - 1, 0); |
ad66baa4 | 510 | sit_for (2, 0, 0, 1, 1); |
21cfcccf EZ |
511 | } |
512 | ||
513 | done: | |
21cfcccf EZ |
514 | |
515 | return (ok ? string : Qnil); | |
516 | } | |
517 | ||
767079a8 | 518 | DEFUN ("w16-get-clipboard-data", Fw16_get_clipboard_data, Sw16_get_clipboard_data, 0, 1, 0, |
21cfcccf EZ |
519 | "This gets the clipboard data in text format.") |
520 | (frame) | |
521 | Lisp_Object frame; | |
522 | { | |
523 | unsigned data_size, truelen; | |
524 | unsigned char *htext; | |
525 | Lisp_Object ret = Qnil; | |
583f5d53 EZ |
526 | int no_crlf_conversion; |
527 | int require_encoding = 0; | |
528 | ||
21cfcccf EZ |
529 | if (NILP (frame)) |
530 | frame = Fselected_frame (); | |
531 | ||
532 | CHECK_LIVE_FRAME (frame, 0); | |
533 | if ( !FRAME_MSDOS_P (XFRAME (frame))) | |
534 | goto done; | |
535 | ||
536 | BLOCK_INPUT; | |
537 | ||
538 | if (!open_clipboard ()) | |
31354c30 | 539 | goto unblock; |
21cfcccf | 540 | |
538d05bb | 541 | if ((data_size = get_clipboard_data_size (CF_OEMTEXT)) == 0 || |
21cfcccf EZ |
542 | (htext = (unsigned char *)xmalloc (data_size)) == 0) |
543 | goto closeclip; | |
544 | ||
545 | /* need to know final size after '\r' chars are removed because | |
546 | we can't change the string size manually, and doing an extra | |
547 | copy is silly */ | |
538d05bb | 548 | if ((truelen = get_clipboard_data (CF_OEMTEXT, htext, data_size, 0)) == 0) |
21cfcccf EZ |
549 | goto closeclip; |
550 | ||
583f5d53 | 551 | /* Do we need to decode it? */ |
9963e859 EZ |
552 | if ( |
553 | #if 1 | |
554 | 1 | |
555 | #else | |
556 | ! NILP (buffer_defaults.enable_multibyte_characters) | |
557 | #endif | |
558 | ) | |
583f5d53 EZ |
559 | { |
560 | /* If the clipboard data contains any 8-bit Latin-1 code, we | |
561 | need to decode it. */ | |
562 | int i; | |
563 | ||
564 | for (i = 0; i < truelen; i++) | |
565 | { | |
566 | if (htext[i] >= 0x80) | |
567 | { | |
568 | require_encoding = 1; | |
569 | break; | |
570 | } | |
571 | } | |
572 | } | |
573 | if (require_encoding) | |
574 | { | |
575 | int bufsize; | |
576 | unsigned char *buf; | |
577 | struct coding_system coding; | |
578 | ||
9963e859 EZ |
579 | if (NILP (Vnext_selection_coding_system)) |
580 | Vnext_selection_coding_system = Vselection_coding_system; | |
583f5d53 | 581 | setup_coding_system |
9963e859 EZ |
582 | (Fcheck_coding_system (Vnext_selection_coding_system), &coding); |
583 | Vnext_selection_coding_system = Qnil; | |
583f5d53 | 584 | coding.mode |= CODING_MODE_LAST_BLOCK; |
538d05bb | 585 | truelen = get_clipboard_data (CF_OEMTEXT, htext, data_size, 1); |
583f5d53 EZ |
586 | bufsize = decoding_buffer_size (&coding, truelen); |
587 | buf = (unsigned char *) xmalloc (bufsize); | |
588 | decode_coding (&coding, htext, buf, truelen, bufsize); | |
589 | truelen = (coding.fake_multibyte | |
590 | ? multibyte_chars_in_text (buf, coding.produced) | |
591 | : coding.produced_char); | |
592 | ret = make_string_from_bytes ((char *) buf, truelen, coding.produced); | |
593 | xfree (buf); | |
594 | Vlast_coding_system_used = coding.symbol; | |
595 | } | |
596 | else | |
597 | { | |
598 | ret = make_unibyte_string ((char *) htext, truelen); | |
599 | Vlast_coding_system_used = Qraw_text; | |
600 | } | |
601 | ||
21cfcccf EZ |
602 | xfree (htext); |
603 | ||
604 | closeclip: | |
605 | close_clipboard (); | |
31354c30 EZ |
606 | |
607 | unblock: | |
608 | UNBLOCK_INPUT; | |
21cfcccf EZ |
609 | |
610 | done: | |
21cfcccf EZ |
611 | |
612 | return (ret); | |
613 | } | |
614 | ||
615 | /* Support checking for a clipboard selection. */ | |
616 | ||
617 | DEFUN ("x-selection-exists-p", Fx_selection_exists_p, Sx_selection_exists_p, | |
618 | 0, 1, 0, | |
619 | "Whether there is an owner for the given X Selection.\n\ | |
620 | The arg should be the name of the selection in question, typically one of\n\ | |
621 | the symbols `PRIMARY', `SECONDARY', or `CLIPBOARD'.\n\ | |
622 | \(Those are literal upper-case symbol names, since that's what X expects.)\n\ | |
623 | For convenience, the symbol nil is the same as `PRIMARY',\n\ | |
624 | and t is the same as `SECONDARY'.") | |
625 | (selection) | |
626 | Lisp_Object selection; | |
627 | { | |
628 | CHECK_SYMBOL (selection, 0); | |
629 | ||
630 | /* Return nil for SECONDARY selection. For PRIMARY (or nil) | |
631 | selection, check if there is some text on the kill-ring; | |
632 | for CLIPBOARD, check if the clipboard currently has valid | |
633 | text format contents. | |
634 | ||
635 | The test for killed text on the kill-ring emulates the Emacs | |
636 | behavior on X, where killed text is also put into X selection | |
637 | by the X interface code. (On MSDOS, killed text is only put | |
638 | into the clipboard if we run under Windows, so we cannot check | |
639 | the clipboard alone.) */ | |
640 | if ((EQ (selection, Qnil) || EQ (selection, QPRIMARY)) | |
641 | && ! NILP (XSYMBOL (Fintern_soft (build_string ("kill-ring"), | |
642 | Qnil))->value)) | |
643 | return Qt; | |
644 | ||
645 | if (EQ (selection, QCLIPBOARD)) | |
646 | { | |
647 | Lisp_Object val = Qnil; | |
648 | ||
649 | if (open_clipboard ()) | |
650 | { | |
538d05bb | 651 | if (get_clipboard_data_size (CF_OEMTEXT)) |
21cfcccf EZ |
652 | val = Qt; |
653 | close_clipboard (); | |
654 | } | |
655 | return val; | |
656 | } | |
657 | return Qnil; | |
658 | } | |
659 | ||
660 | void | |
661 | syms_of_win16select () | |
662 | { | |
767079a8 EZ |
663 | defsubr (&Sw16_set_clipboard_data); |
664 | defsubr (&Sw16_get_clipboard_data); | |
21cfcccf EZ |
665 | defsubr (&Sx_selection_exists_p); |
666 | ||
199c7c44 | 667 | DEFVAR_LISP ("selection-coding-system", &Vselection_coding_system, |
583f5d53 EZ |
668 | "Coding system for communicating with other X clients.\n\ |
669 | When sending or receiving text via cut_buffer, selection, and clipboard,\n\ | |
670 | the text is encoded or decoded by this coding system.\n\ | |
671 | A default value is `iso-latin-1-dos'"); | |
199c7c44 | 672 | Vselection_coding_system=intern ("iso-latin-1-dos"); |
9963e859 EZ |
673 | |
674 | DEFVAR_LISP ("next-selection-coding-system", &Vnext_selection_coding_system, | |
675 | "Coding system for the next communication with other X clients.\n\ | |
676 | Usually, `selection-coding-system' is used for communicating with\n\ | |
677 | other X clients. But, if this variable is set, it is used for the\n\ | |
678 | next communication only. After the communication, this variable is\n\ | |
679 | set to nil."); | |
680 | Vnext_selection_coding_system = Qnil; | |
583f5d53 | 681 | |
21cfcccf EZ |
682 | QPRIMARY = intern ("PRIMARY"); staticpro (&QPRIMARY); |
683 | QCLIPBOARD = intern ("CLIPBOARD"); staticpro (&QCLIPBOARD); | |
684 | } | |
685 | ||
686 | #endif /* MSDOS */ |