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. */ | |
21cfcccf EZ |
80 | static struct { |
81 | unsigned long size; | |
82 | unsigned short rm_segment; | |
83 | } clipboard_xfer_buf_info; | |
5033894e EZ |
84 | |
85 | /* The last text we put into the clipboard. This is used to prevent | |
86 | passing back our own text from the clipboard, instead of using the | |
87 | kill ring. The former is undesirable because the clipboard data | |
88 | could be MULEtilated by inappropriately chosen | |
89 | (next-)selection-coding-system. For this reason, we must store the | |
90 | text *after* it was encoded/Unix-to-DOS-converted. */ | |
91 | static unsigned char *last_clipboard_text; | |
92 | ||
93 | /* The size of allocated storage for storing the clipboard data. */ | |
94 | static size_t clipboard_storage_size; | |
21cfcccf EZ |
95 | \f |
96 | /* Emulation of `__dpmi_int' and friends for DJGPP v1.x */ | |
97 | ||
98 | #if __DJGPP__ < 2 | |
99 | ||
100 | typedef _go32_dpmi_registers __dpmi_regs; | |
101 | #define __tb _go32_info_block.linear_address_of_transfer_buffer | |
102 | #define _dos_ds _go32_info_block.selector_for_linear_memory | |
103 | ||
104 | static int | |
105 | __dpmi_int (intno, regs) | |
106 | int intno; | |
107 | __dpmi_regs *regs; | |
108 | { | |
109 | regs->x.ss = regs->x.sp = regs->x.flags = 0; | |
110 | return _go32_dpmi_simulate_int (intno, regs); | |
111 | } | |
112 | ||
113 | #endif /* __DJGPP__ < 2 */ | |
114 | \f | |
115 | /* C functions to access the Windows 3.1x clipboard from DOS apps. | |
116 | ||
117 | The information was obtained from the Microsoft Knowledge Base, | |
118 | article Q67675 and can be found at: | |
119 | http://www.microsoft.com/kb/developr/win_dk/q67675.htm */ | |
120 | ||
121 | /* See also Ralf Brown's Interrupt List. | |
122 | ||
123 | I also seem to remember reading about this in Dr. Dobbs Journal a | |
124 | while ago, but if you knew my memory... :-) | |
125 | ||
126 | Dale P. Smith <dpsm@en.com> */ | |
127 | ||
128 | /* Return the WinOldAp support version, or 0x1700 if not supported. */ | |
129 | unsigned | |
130 | identify_winoldap_version () | |
131 | { | |
132 | __dpmi_regs regs; | |
133 | ||
134 | /* Calls Int 2Fh/AX=1700h | |
135 | Return Values AX == 1700H: Clipboard functions not available | |
136 | <> 1700H: AL = Major version number | |
137 | AH = Minor version number */ | |
138 | regs.x.ax = 0x1700; | |
139 | __dpmi_int(0x2f, ®s); | |
140 | return regs.x.ax; | |
141 | } | |
142 | ||
143 | /* Open the clipboard, return non-zero if successfull. */ | |
144 | unsigned | |
145 | open_clipboard () | |
146 | { | |
147 | __dpmi_regs regs; | |
148 | ||
149 | /* Is WINOLDAP supported? */ | |
150 | /* Kludge alert!! If WinOldAp is not supported, we return a 0, | |
151 | which is the same as ``Clipboard already open''. Currently, | |
152 | this is taken as an error by all the functions that use | |
153 | `open_clipboard', but if somebody someday will use that ``open'' | |
154 | clipboard, they will have interesting time debugging it... */ | |
155 | if (identify_winoldap_version () == 0x1700) | |
156 | return 0; | |
157 | ||
158 | /* Calls Int 2Fh/AX=1701h | |
159 | Return Values AX == 0: Clipboard already open | |
160 | <> 0: Clipboard opened */ | |
161 | regs.x.ax = 0x1701; | |
162 | __dpmi_int(0x2f, ®s); | |
163 | return regs.x.ax; | |
164 | } | |
165 | ||
166 | /* Empty clipboard, return non-zero if successfull. */ | |
167 | unsigned | |
168 | empty_clipboard () | |
169 | { | |
170 | __dpmi_regs regs; | |
171 | ||
172 | /* Calls Int 2Fh/AX=1702h | |
173 | Return Values AX == 0: Error occurred | |
174 | <> 0: OK, Clipboard emptied */ | |
175 | regs.x.ax = 0x1702; | |
176 | __dpmi_int(0x2f, ®s); | |
177 | return regs.x.ax; | |
178 | } | |
179 | ||
180 | /* Ensure we have a buffer in low memory with enough memory for data | |
181 | of size WANT_SIZE. Return the linear address of the buffer. */ | |
182 | static unsigned long | |
183 | alloc_xfer_buf (want_size) | |
184 | unsigned want_size; | |
185 | { | |
186 | __dpmi_regs regs; | |
187 | ||
188 | /* If the usual DJGPP transfer buffer is large enough, use that. */ | |
189 | if (want_size <= _go32_info_block.size_of_transfer_buffer) | |
190 | return __tb & 0xfffff; | |
191 | ||
767079a8 EZ |
192 | /* Don't even try to allocate more than 1MB of memory: DOS cannot |
193 | possibly handle that (it will overflow the BX register below). */ | |
194 | if (want_size > 0xfffff) | |
195 | return 0; | |
196 | ||
21cfcccf EZ |
197 | /* Need size rounded up to the nearest paragraph, and in |
198 | paragraph units (1 paragraph = 16 bytes). */ | |
199 | clipboard_xfer_buf_info.size = (want_size + 15) >> 4; | |
200 | ||
201 | /* The NT DPMI host crashes us if we free DOS memory via the | |
202 | DPMI service. Work around by calling DOS allocate/free block. */ | |
203 | regs.h.ah = 0x48; | |
204 | regs.x.bx = clipboard_xfer_buf_info.size; | |
205 | __dpmi_int (0x21, ®s); | |
206 | if (regs.x.flags & 1) | |
207 | { | |
208 | clipboard_xfer_buf_info.size = 0; | |
209 | return 0; | |
210 | } | |
211 | ||
212 | clipboard_xfer_buf_info.rm_segment = regs.x.ax; | |
213 | return (((int)clipboard_xfer_buf_info.rm_segment) << 4) & 0xfffff; | |
214 | } | |
215 | ||
216 | /* Free our clipboard buffer. We always free it after use, because | |
217 | keeping it leaves less free conventional memory for subprocesses. | |
218 | The clipboard buffer tends to be large in size, because for small | |
219 | clipboard data sizes we use the DJGPP transfer buffer. */ | |
220 | static void | |
221 | free_xfer_buf () | |
222 | { | |
223 | /* If the size is 0, we used DJGPP transfer buffer, so don't free. */ | |
224 | if (clipboard_xfer_buf_info.size) | |
225 | { | |
226 | __dpmi_regs regs; | |
227 | ||
228 | /* The NT DPMI host crashes us if we free DOS memory via | |
229 | the DPMI service. Work around by calling DOS free block. */ | |
230 | regs.h.ah = 0x49; | |
231 | regs.x.es = clipboard_xfer_buf_info.rm_segment; | |
232 | __dpmi_int (0x21, ®s); | |
233 | clipboard_xfer_buf_info.size = 0; | |
234 | } | |
235 | } | |
236 | ||
0265f89f | 237 | /* Copy data into the clipboard, return zero if successfull. */ |
21cfcccf | 238 | unsigned |
583f5d53 | 239 | set_clipboard_data (Format, Data, Size, Raw) |
21cfcccf EZ |
240 | unsigned Format; |
241 | void *Data; | |
242 | unsigned Size; | |
583f5d53 | 243 | int Raw; |
21cfcccf EZ |
244 | { |
245 | __dpmi_regs regs; | |
246 | unsigned truelen; | |
247 | unsigned long xbuf_addr, buf_offset; | |
248 | unsigned char *dp = Data, *dstart = dp; | |
249 | ||
538d05bb | 250 | if (Format != CF_OEMTEXT) |
21cfcccf EZ |
251 | return 0; |
252 | ||
253 | /* need to know final size after '\r' chars are inserted (the | |
538d05bb | 254 | standard CF_OEMTEXT clipboard format uses CRLF line endings, |
21cfcccf | 255 | while Emacs uses just LF internally). */ |
0265f89f | 256 | truelen = Size + 1; /* +1 for the terminating null */ |
583f5d53 EZ |
257 | |
258 | if (!Raw) | |
21cfcccf | 259 | { |
583f5d53 EZ |
260 | /* avoid using strchr because it recomputes the length everytime */ |
261 | while ((dp = memchr (dp, '\n', Size - (dp - dstart))) != 0) | |
262 | { | |
263 | truelen++; | |
264 | dp++; | |
265 | } | |
21cfcccf EZ |
266 | } |
267 | ||
268 | if (clipboard_compact (truelen) < truelen) | |
269 | return 0; | |
270 | ||
271 | if ((xbuf_addr = alloc_xfer_buf (truelen)) == 0) | |
272 | return 0; | |
273 | ||
583f5d53 EZ |
274 | /* Move the buffer into the low memory, convert LF into CR-LF if needed. */ |
275 | if (Raw) | |
0236e3f1 EZ |
276 | { |
277 | dosmemput (Data, Size, xbuf_addr); | |
278 | ||
279 | /* Terminate with a null, otherwise Windows does strange things | |
280 | when the text size is an integral multiple of 32 bytes. */ | |
281 | _farpokeb (_dos_ds, xbuf_addr + Size, '\0'); | |
282 | } | |
583f5d53 | 283 | else |
21cfcccf | 284 | { |
583f5d53 EZ |
285 | dp = Data; |
286 | buf_offset = xbuf_addr; | |
287 | _farsetsel (_dos_ds); | |
288 | while (Size--) | |
289 | { | |
0265f89f EZ |
290 | /* Don't allow them to put binary data into the clipboard, since |
291 | it will cause yanked data to be truncated at the first null. */ | |
292 | if (*dp == '\0') | |
293 | return 2; | |
583f5d53 EZ |
294 | if (*dp == '\n') |
295 | _farnspokeb (buf_offset++, '\r'); | |
296 | _farnspokeb (buf_offset++, *dp++); | |
297 | } | |
21cfcccf | 298 | |
0236e3f1 EZ |
299 | /* Terminate with a null, otherwise Windows does strange things |
300 | when the text size is an integral multiple of 32 bytes. */ | |
301 | _farnspokeb (buf_offset, '\0'); | |
302 | } | |
0265f89f | 303 | |
5033894e EZ |
304 | /* Stash away the data we are about to put into the clipboard, so we |
305 | could later check inside get_clipboard_data whether the clipboard | |
306 | still holds our data. */ | |
307 | if (clipboard_storage_size < truelen) | |
308 | { | |
309 | clipboard_storage_size = truelen + 100; | |
310 | last_clipboard_text = | |
311 | (char *) xrealloc (last_clipboard_text, clipboard_storage_size); | |
312 | } | |
313 | if (last_clipboard_text) | |
314 | dosmemget (xbuf_addr, truelen, last_clipboard_text); | |
315 | ||
21cfcccf EZ |
316 | /* Calls Int 2Fh/AX=1703h with: |
317 | DX = WinOldAp-Supported Clipboard format | |
318 | ES:BX = Pointer to data | |
319 | SI:CX = Size of data in bytes | |
320 | Return Values AX == 0: Error occurred | |
321 | <> 0: OK. Data copied into the Clipboard. */ | |
322 | regs.x.ax = 0x1703; | |
323 | regs.x.dx = Format; | |
324 | regs.x.si = truelen >> 16; | |
325 | regs.x.cx = truelen & 0xffff; | |
326 | regs.x.es = xbuf_addr >> 4; | |
327 | regs.x.bx = xbuf_addr & 15; | |
328 | __dpmi_int(0x2f, ®s); | |
329 | ||
330 | free_xfer_buf (); | |
331 | ||
5033894e EZ |
332 | /* If the above failed, invalidate the local copy of the clipboard. */ |
333 | if (regs.x.ax == 0) | |
334 | *last_clipboard_text = '\0'; | |
335 | ||
0265f89f EZ |
336 | /* Zero means success, otherwise (1 or 2) it's an error. */ |
337 | return regs.x.ax > 0 ? 0 : 1; | |
21cfcccf EZ |
338 | } |
339 | ||
340 | /* Return the size of the clipboard data of format FORMAT. */ | |
341 | unsigned | |
342 | get_clipboard_data_size (Format) | |
343 | unsigned Format; | |
344 | { | |
345 | __dpmi_regs regs; | |
346 | ||
347 | /* Calls Int 2Fh/AX=1704h with: | |
348 | DX = WinOldAp-Supported Clipboard format | |
349 | Return Values DX:AX == Size of the data in bytes, including any | |
350 | headers. | |
351 | == 0 If data in this format is not in | |
352 | the clipboard. */ | |
353 | regs.x.ax = 0x1704; | |
354 | regs.x.dx = Format; | |
355 | __dpmi_int(0x2f, ®s); | |
356 | return ( (((unsigned)regs.x.dx) << 16) | regs.x.ax); | |
357 | } | |
358 | ||
359 | /* Get clipboard data, return its length. | |
360 | Warning: this doesn't check whether DATA has enough space to hold | |
361 | SIZE bytes. */ | |
362 | unsigned | |
583f5d53 | 363 | get_clipboard_data (Format, Data, Size, Raw) |
21cfcccf EZ |
364 | unsigned Format; |
365 | void *Data; | |
366 | unsigned Size; | |
583f5d53 | 367 | int Raw; |
21cfcccf EZ |
368 | { |
369 | __dpmi_regs regs; | |
21cfcccf EZ |
370 | unsigned long xbuf_addr; |
371 | unsigned char *dp = Data; | |
372 | ||
538d05bb | 373 | if (Format != CF_OEMTEXT) |
21cfcccf EZ |
374 | return 0; |
375 | ||
376 | if (Size == 0) | |
377 | return 0; | |
378 | ||
379 | if ((xbuf_addr = alloc_xfer_buf (Size)) == 0) | |
380 | return 0; | |
381 | ||
382 | /* Calls Int 2Fh/AX=1705h with: | |
383 | DX = WinOldAp-Supported Clipboard format | |
384 | ES:BX = Pointer to data buffer to hold data | |
385 | Return Values AX == 0: Error occurred (or data in this format is not | |
386 | in the clipboard) | |
387 | <> 0: OK */ | |
388 | regs.x.ax = 0x1705; | |
389 | regs.x.dx = Format; | |
390 | regs.x.es = xbuf_addr >> 4; | |
391 | regs.x.bx = xbuf_addr & 15; | |
392 | __dpmi_int(0x2f, ®s); | |
393 | if (regs.x.ax != 0) | |
394 | { | |
5033894e EZ |
395 | unsigned char null_char = '\0'; |
396 | unsigned long xbuf_beg = xbuf_addr; | |
397 | ||
398 | /* If last_clipboard_text is NULL, we don't want to slow down | |
399 | the next loop by an additional test. */ | |
400 | register unsigned char *lcdp = | |
401 | last_clipboard_text == NULL ? &null_char : last_clipboard_text; | |
402 | ||
583f5d53 EZ |
403 | /* Copy data from low memory, remove CR |
404 | characters before LF if needed. */ | |
21cfcccf EZ |
405 | _farsetsel (_dos_ds); |
406 | while (Size--) | |
407 | { | |
408 | register unsigned char c = _farnspeekb (xbuf_addr++); | |
409 | ||
5033894e EZ |
410 | if (*lcdp == c) |
411 | lcdp++; | |
412 | ||
583f5d53 | 413 | if ((*dp++ = c) == '\r' && !Raw && _farnspeekb (xbuf_addr) == '\n') |
21cfcccf EZ |
414 | { |
415 | dp--; | |
416 | *dp++ = '\n'; | |
417 | xbuf_addr++; | |
5033894e EZ |
418 | if (*lcdp == '\n') |
419 | lcdp++; | |
21cfcccf EZ |
420 | } |
421 | /* Windows reportedly rounds up the size of clipboard data | |
4029384b EZ |
422 | (passed in SIZE) to a multiple of 32, and removes trailing |
423 | spaces from each line without updating SIZE. We therefore | |
424 | bail out when we see the first null character. */ | |
425 | else if (c == '\0') | |
0265f89f | 426 | break; |
21cfcccf | 427 | } |
5033894e EZ |
428 | |
429 | /* If the text in clipboard is identical to what we put there | |
430 | last time set_clipboard_data was called, pretend there's no | |
431 | data in the clipboard. This is so we don't pass our own text | |
4029384b EZ |
432 | from the clipboard (which might be troublesome if the killed |
433 | text includes null characters). */ | |
5033894e EZ |
434 | if (last_clipboard_text && |
435 | xbuf_addr - xbuf_beg == (long)(lcdp - last_clipboard_text)) | |
436 | dp = (unsigned char *)Data + 1; | |
21cfcccf EZ |
437 | } |
438 | ||
439 | free_xfer_buf (); | |
440 | ||
0265f89f | 441 | return (unsigned) (dp - (unsigned char *)Data - 1); |
21cfcccf EZ |
442 | } |
443 | ||
444 | /* Close clipboard, return non-zero if successfull. */ | |
445 | unsigned | |
446 | close_clipboard () | |
447 | { | |
448 | __dpmi_regs regs; | |
449 | ||
450 | /* Calls Int 2Fh/AX=1708h | |
451 | Return Values AX == 0: Error occurred | |
452 | <> 0: OK */ | |
453 | regs.x.ax = 0x1708; | |
454 | __dpmi_int(0x2f, ®s); | |
455 | return regs.x.ax; | |
456 | } | |
457 | ||
458 | /* Compact clipboard data so that at least SIZE bytes is available. */ | |
459 | unsigned | |
460 | clipboard_compact (Size) | |
461 | unsigned Size; | |
462 | { | |
463 | __dpmi_regs regs; | |
464 | ||
465 | /* Calls Int 2Fh/AX=1709H with: | |
466 | SI:CX = Desired memory size in bytes. | |
467 | Return Values DX:AX == Number of bytes of largest block of free memory. | |
468 | == 0 if error or no memory */ | |
469 | regs.x.ax = 0x1709; | |
470 | regs.x.si = Size >> 16; | |
471 | regs.x.cx = Size & 0xffff; | |
472 | __dpmi_int(0x2f, ®s); | |
473 | return ((unsigned)regs.x.dx << 16) | regs.x.ax; | |
474 | } | |
475 | \f | |
476 | static char no_mem_msg[] = | |
477 | "(Not enough DOS memory to put saved text into clipboard.)"; | |
0265f89f EZ |
478 | static char binary_msg[] = |
479 | "(Binary characters in saved text; clipboard data not set.)"; | |
21cfcccf | 480 | |
767079a8 | 481 | DEFUN ("w16-set-clipboard-data", Fw16_set_clipboard_data, Sw16_set_clipboard_data, 1, 2, 0, |
21cfcccf EZ |
482 | "This sets the clipboard data to the given text.") |
483 | (string, frame) | |
484 | Lisp_Object string, frame; | |
485 | { | |
0265f89f | 486 | unsigned ok = 1, put_status = 0; |
21cfcccf | 487 | int nbytes; |
583f5d53 EZ |
488 | unsigned char *src, *dst = NULL; |
489 | int charsets[MAX_CHARSET + 1]; | |
490 | int num; | |
491 | int no_crlf_conversion; | |
21cfcccf EZ |
492 | |
493 | CHECK_STRING (string, 0); | |
494 | ||
495 | if (NILP (frame)) | |
496 | frame = Fselected_frame (); | |
497 | ||
498 | CHECK_LIVE_FRAME (frame, 0); | |
499 | if ( !FRAME_MSDOS_P (XFRAME (frame))) | |
500 | goto done; | |
501 | ||
502 | BLOCK_INPUT; | |
503 | ||
199c7c44 | 504 | nbytes = STRING_BYTES (XSTRING (string)); |
21cfcccf | 505 | src = XSTRING (string)->data; |
583f5d53 EZ |
506 | |
507 | /* Since we are now handling multilingual text, we must consider | |
508 | encoding text for the clipboard. */ | |
583f5d53 | 509 | bzero (charsets, (MAX_CHARSET + 1) * sizeof (int)); |
199c7c44 | 510 | num = ((nbytes <= 1 /* Check the possibility of short cut. */ |
9963e859 EZ |
511 | || !STRING_MULTIBYTE (string) |
512 | || nbytes == XSTRING (string)->size) | |
583f5d53 | 513 | ? 0 |
42912be3 | 514 | : find_charset_in_str (src, nbytes, charsets, Qnil, 0, 1)); |
583f5d53 EZ |
515 | |
516 | if (!num || (num == 1 && charsets[CHARSET_ASCII])) | |
517 | { | |
518 | /* No multibyte character in OBJ. We need not encode it, but we | |
519 | will have to convert it to DOS CR-LF style. */ | |
520 | no_crlf_conversion = 0; | |
521 | } | |
522 | else | |
523 | { | |
524 | /* We must encode contents of STRING according to what | |
525 | clipboard-coding-system specifies. */ | |
526 | int bufsize; | |
527 | struct coding_system coding; | |
528 | unsigned char *htext2; | |
529 | ||
9963e859 EZ |
530 | if (NILP (Vnext_selection_coding_system)) |
531 | Vnext_selection_coding_system = Vselection_coding_system; | |
583f5d53 | 532 | setup_coding_system |
9963e859 EZ |
533 | (Fcheck_coding_system (Vnext_selection_coding_system), &coding); |
534 | Vnext_selection_coding_system = Qnil; | |
583f5d53 EZ |
535 | coding.mode |= CODING_MODE_LAST_BLOCK; |
536 | Vlast_coding_system_used = coding.symbol; | |
537 | bufsize = encoding_buffer_size (&coding, nbytes); | |
538 | dst = (unsigned char *) xmalloc (bufsize); | |
539 | encode_coding (&coding, src, dst, nbytes, bufsize); | |
540 | no_crlf_conversion = 1; | |
c7594627 | 541 | nbytes = coding.produced; |
ba92a470 | 542 | src = dst; |
583f5d53 EZ |
543 | } |
544 | ||
21cfcccf EZ |
545 | if (!open_clipboard ()) |
546 | goto error; | |
547 | ||
583f5d53 | 548 | ok = empty_clipboard () |
0265f89f | 549 | && ((put_status |
ba92a470 | 550 | = set_clipboard_data (CF_OEMTEXT, src, nbytes, no_crlf_conversion)) |
0265f89f | 551 | == 0); |
583f5d53 EZ |
552 | |
553 | if (!no_crlf_conversion) | |
554 | Vlast_coding_system_used = Qraw_text; | |
21cfcccf EZ |
555 | close_clipboard (); |
556 | ||
31354c30 | 557 | if (ok) goto unblock; |
21cfcccf EZ |
558 | |
559 | error: | |
560 | ||
561 | ok = 0; | |
562 | ||
31354c30 | 563 | unblock: |
583f5d53 EZ |
564 | if (dst) |
565 | xfree (dst); | |
31354c30 EZ |
566 | UNBLOCK_INPUT; |
567 | ||
21cfcccf EZ |
568 | /* Notify user if the text is too large to fit into DOS memory. |
569 | (This will happen somewhere after 600K bytes (470K in DJGPP v1.x), | |
570 | depending on user system configuration.) If we just silently | |
571 | fail the function, people might wonder why their text sometimes | |
572 | doesn't make it to the clipboard. */ | |
0265f89f | 573 | if (put_status) |
21cfcccf | 574 | { |
0265f89f EZ |
575 | switch (put_status) |
576 | { | |
577 | case 1: | |
578 | message2 (no_mem_msg, sizeof (no_mem_msg) - 1, 0); | |
579 | break; | |
580 | case 2: | |
581 | message2 (binary_msg, sizeof (binary_msg) - 1, 0); | |
582 | break; | |
583 | } | |
ad66baa4 | 584 | sit_for (2, 0, 0, 1, 1); |
21cfcccf EZ |
585 | } |
586 | ||
587 | done: | |
21cfcccf | 588 | |
0265f89f | 589 | return (ok && put_status == 0 ? string : Qnil); |
21cfcccf EZ |
590 | } |
591 | ||
767079a8 | 592 | DEFUN ("w16-get-clipboard-data", Fw16_get_clipboard_data, Sw16_get_clipboard_data, 0, 1, 0, |
21cfcccf EZ |
593 | "This gets the clipboard data in text format.") |
594 | (frame) | |
595 | Lisp_Object frame; | |
596 | { | |
597 | unsigned data_size, truelen; | |
598 | unsigned char *htext; | |
599 | Lisp_Object ret = Qnil; | |
583f5d53 EZ |
600 | int no_crlf_conversion; |
601 | int require_encoding = 0; | |
602 | ||
21cfcccf EZ |
603 | if (NILP (frame)) |
604 | frame = Fselected_frame (); | |
605 | ||
606 | CHECK_LIVE_FRAME (frame, 0); | |
607 | if ( !FRAME_MSDOS_P (XFRAME (frame))) | |
608 | goto done; | |
609 | ||
610 | BLOCK_INPUT; | |
611 | ||
612 | if (!open_clipboard ()) | |
31354c30 | 613 | goto unblock; |
21cfcccf | 614 | |
538d05bb | 615 | if ((data_size = get_clipboard_data_size (CF_OEMTEXT)) == 0 || |
21cfcccf EZ |
616 | (htext = (unsigned char *)xmalloc (data_size)) == 0) |
617 | goto closeclip; | |
618 | ||
619 | /* need to know final size after '\r' chars are removed because | |
620 | we can't change the string size manually, and doing an extra | |
621 | copy is silly */ | |
538d05bb | 622 | if ((truelen = get_clipboard_data (CF_OEMTEXT, htext, data_size, 0)) == 0) |
21cfcccf EZ |
623 | goto closeclip; |
624 | ||
583f5d53 | 625 | /* Do we need to decode it? */ |
9963e859 EZ |
626 | if ( |
627 | #if 1 | |
628 | 1 | |
629 | #else | |
630 | ! NILP (buffer_defaults.enable_multibyte_characters) | |
631 | #endif | |
632 | ) | |
583f5d53 EZ |
633 | { |
634 | /* If the clipboard data contains any 8-bit Latin-1 code, we | |
635 | need to decode it. */ | |
636 | int i; | |
637 | ||
638 | for (i = 0; i < truelen; i++) | |
639 | { | |
640 | if (htext[i] >= 0x80) | |
641 | { | |
642 | require_encoding = 1; | |
643 | break; | |
644 | } | |
645 | } | |
646 | } | |
647 | if (require_encoding) | |
648 | { | |
649 | int bufsize; | |
650 | unsigned char *buf; | |
651 | struct coding_system coding; | |
652 | ||
9963e859 EZ |
653 | if (NILP (Vnext_selection_coding_system)) |
654 | Vnext_selection_coding_system = Vselection_coding_system; | |
583f5d53 | 655 | setup_coding_system |
9963e859 EZ |
656 | (Fcheck_coding_system (Vnext_selection_coding_system), &coding); |
657 | Vnext_selection_coding_system = Qnil; | |
583f5d53 | 658 | coding.mode |= CODING_MODE_LAST_BLOCK; |
538d05bb | 659 | truelen = get_clipboard_data (CF_OEMTEXT, htext, data_size, 1); |
583f5d53 EZ |
660 | bufsize = decoding_buffer_size (&coding, truelen); |
661 | buf = (unsigned char *) xmalloc (bufsize); | |
662 | decode_coding (&coding, htext, buf, truelen, bufsize); | |
663 | truelen = (coding.fake_multibyte | |
664 | ? multibyte_chars_in_text (buf, coding.produced) | |
665 | : coding.produced_char); | |
666 | ret = make_string_from_bytes ((char *) buf, truelen, coding.produced); | |
667 | xfree (buf); | |
668 | Vlast_coding_system_used = coding.symbol; | |
669 | } | |
670 | else | |
671 | { | |
672 | ret = make_unibyte_string ((char *) htext, truelen); | |
673 | Vlast_coding_system_used = Qraw_text; | |
674 | } | |
675 | ||
21cfcccf EZ |
676 | xfree (htext); |
677 | ||
678 | closeclip: | |
679 | close_clipboard (); | |
31354c30 EZ |
680 | |
681 | unblock: | |
682 | UNBLOCK_INPUT; | |
21cfcccf EZ |
683 | |
684 | done: | |
21cfcccf EZ |
685 | |
686 | return (ret); | |
687 | } | |
688 | ||
689 | /* Support checking for a clipboard selection. */ | |
690 | ||
691 | DEFUN ("x-selection-exists-p", Fx_selection_exists_p, Sx_selection_exists_p, | |
692 | 0, 1, 0, | |
693 | "Whether there is an owner for the given X Selection.\n\ | |
694 | The arg should be the name of the selection in question, typically one of\n\ | |
695 | the symbols `PRIMARY', `SECONDARY', or `CLIPBOARD'.\n\ | |
696 | \(Those are literal upper-case symbol names, since that's what X expects.)\n\ | |
697 | For convenience, the symbol nil is the same as `PRIMARY',\n\ | |
698 | and t is the same as `SECONDARY'.") | |
699 | (selection) | |
700 | Lisp_Object selection; | |
701 | { | |
702 | CHECK_SYMBOL (selection, 0); | |
703 | ||
704 | /* Return nil for SECONDARY selection. For PRIMARY (or nil) | |
705 | selection, check if there is some text on the kill-ring; | |
706 | for CLIPBOARD, check if the clipboard currently has valid | |
707 | text format contents. | |
708 | ||
709 | The test for killed text on the kill-ring emulates the Emacs | |
710 | behavior on X, where killed text is also put into X selection | |
711 | by the X interface code. (On MSDOS, killed text is only put | |
712 | into the clipboard if we run under Windows, so we cannot check | |
713 | the clipboard alone.) */ | |
714 | if ((EQ (selection, Qnil) || EQ (selection, QPRIMARY)) | |
715 | && ! NILP (XSYMBOL (Fintern_soft (build_string ("kill-ring"), | |
716 | Qnil))->value)) | |
717 | return Qt; | |
718 | ||
719 | if (EQ (selection, QCLIPBOARD)) | |
720 | { | |
721 | Lisp_Object val = Qnil; | |
722 | ||
723 | if (open_clipboard ()) | |
724 | { | |
538d05bb | 725 | if (get_clipboard_data_size (CF_OEMTEXT)) |
21cfcccf EZ |
726 | val = Qt; |
727 | close_clipboard (); | |
728 | } | |
729 | return val; | |
730 | } | |
731 | return Qnil; | |
732 | } | |
733 | ||
734 | void | |
735 | syms_of_win16select () | |
736 | { | |
767079a8 EZ |
737 | defsubr (&Sw16_set_clipboard_data); |
738 | defsubr (&Sw16_get_clipboard_data); | |
21cfcccf EZ |
739 | defsubr (&Sx_selection_exists_p); |
740 | ||
199c7c44 | 741 | DEFVAR_LISP ("selection-coding-system", &Vselection_coding_system, |
583f5d53 EZ |
742 | "Coding system for communicating with other X clients.\n\ |
743 | When sending or receiving text via cut_buffer, selection, and clipboard,\n\ | |
744 | the text is encoded or decoded by this coding system.\n\ | |
745 | A default value is `iso-latin-1-dos'"); | |
199c7c44 | 746 | Vselection_coding_system=intern ("iso-latin-1-dos"); |
9963e859 EZ |
747 | |
748 | DEFVAR_LISP ("next-selection-coding-system", &Vnext_selection_coding_system, | |
749 | "Coding system for the next communication with other X clients.\n\ | |
750 | Usually, `selection-coding-system' is used for communicating with\n\ | |
751 | other X clients. But, if this variable is set, it is used for the\n\ | |
752 | next communication only. After the communication, this variable is\n\ | |
753 | set to nil."); | |
754 | Vnext_selection_coding_system = Qnil; | |
583f5d53 | 755 | |
21cfcccf EZ |
756 | QPRIMARY = intern ("PRIMARY"); staticpro (&QPRIMARY); |
757 | QCLIPBOARD = intern ("CLIPBOARD"); staticpro (&QCLIPBOARD); | |
758 | } | |
759 | ||
760 | #endif /* MSDOS */ |