Commit | Line | Data |
---|---|---|
767079a8 | 1 | /* 16-bit Windows Selection processing for emacs on MS-Windows |
0b5538bd | 2 | Copyright (C) 1996, 1997, 2001, 2002, 2003, 2004, |
114f9c96 | 3 | 2005, 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc. |
8de1855e | 4 | |
21cfcccf EZ |
5 | This file is part of GNU Emacs. |
6 | ||
9ec0b715 | 7 | GNU Emacs is free software: you can redistribute it and/or modify |
21cfcccf | 8 | it under the terms of the GNU General Public License as published by |
9ec0b715 GM |
9 | the Free Software Foundation, either version 3 of the License, or |
10 | (at your option) any later version. | |
21cfcccf EZ |
11 | |
12 | GNU Emacs is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
9ec0b715 | 18 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
21cfcccf EZ |
19 | |
20 | /* These functions work by using WinOldAp interface. WinOldAp | |
21 | (WINOLDAP.MOD) is a Microsoft Windows extension supporting | |
22 | "old" (character-mode) application access to Dynamic Data Exchange, | |
23 | menus, and the Windows clipboard. */ | |
24 | ||
25 | /* Written by Dale P. Smith <dpsm@en.com> */ | |
26 | /* Adapted to DJGPP v1 by Eli Zaretskii <eliz@is.elta.co.il> */ | |
27 | ||
28 | #ifdef MSDOS | |
29 | ||
30 | #include <config.h> | |
31 | #include <string.h> | |
32 | #include <dpmi.h> | |
33 | #include <go32.h> | |
34 | #include <sys/farptr.h> | |
d7306fe6 | 35 | #include <setjmp.h> |
21cfcccf EZ |
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 | 40 | #include "buffer.h" |
83be827a | 41 | #include "character.h" |
583f5d53 | 42 | #include "coding.h" |
f7d05dc4 | 43 | #include "composite.h" |
21cfcccf EZ |
44 | |
45 | /* If ever some function outside this file will need to call any | |
46 | clipboard-related function, the following prototypes and constants | |
47 | should be put on a header file. Right now, nobody else uses them. */ | |
48 | ||
49 | #define CF_TEXT 0x01 | |
50 | #define CF_BITMAP 0x02 | |
51 | #define CF_METAFILE 0x03 | |
52 | #define CF_SYLK 0x04 | |
53 | #define CF_DIF 0x05 | |
54 | #define CF_TIFF 0x06 | |
55 | #define CF_OEMTEXT 0x07 | |
56 | #define CF_DIBBITMAP 0x08 | |
57 | #define CF_WINWRITE 0x80 | |
58 | #define CF_DSPTEXT 0x81 | |
59 | #define CF_DSPBITMAP 0x82 | |
60 | ||
61 | unsigned identify_winoldap_version (void); | |
62 | unsigned open_clipboard (void); | |
63 | unsigned empty_clipboard (void); | |
583f5d53 | 64 | unsigned set_clipboard_data (unsigned, void *, unsigned, int); |
21cfcccf | 65 | unsigned get_clipboard_data_size (unsigned); |
583f5d53 | 66 | unsigned get_clipboard_data (unsigned, void *, unsigned, int); |
21cfcccf EZ |
67 | unsigned close_clipboard (void); |
68 | unsigned clipboard_compact (unsigned); | |
69 | ||
70 | Lisp_Object QCLIPBOARD, QPRIMARY; | |
71 | ||
583f5d53 EZ |
72 | /* Coding system for communicating with other Windows programs via the |
73 | clipboard. */ | |
199c7c44 | 74 | static Lisp_Object Vselection_coding_system; |
583f5d53 | 75 | |
9963e859 EZ |
76 | /* Coding system for the next communicating with other Windows programs. */ |
77 | static Lisp_Object Vnext_selection_coding_system; | |
78 | ||
21cfcccf EZ |
79 | /* The segment address and the size of the buffer in low |
80 | memory used to move data between us and WinOldAp module. */ | |
21cfcccf EZ |
81 | static struct { |
82 | unsigned long size; | |
83 | unsigned short rm_segment; | |
84 | } clipboard_xfer_buf_info; | |
5033894e EZ |
85 | |
86 | /* The last text we put into the clipboard. This is used to prevent | |
87 | passing back our own text from the clipboard, instead of using the | |
88 | kill ring. The former is undesirable because the clipboard data | |
89 | could be MULEtilated by inappropriately chosen | |
90 | (next-)selection-coding-system. For this reason, we must store the | |
91 | text *after* it was encoded/Unix-to-DOS-converted. */ | |
92 | static unsigned char *last_clipboard_text; | |
93 | ||
94 | /* The size of allocated storage for storing the clipboard data. */ | |
95 | static size_t clipboard_storage_size; | |
21cfcccf EZ |
96 | \f |
97 | /* Emulation of `__dpmi_int' and friends for DJGPP v1.x */ | |
98 | ||
99 | #if __DJGPP__ < 2 | |
100 | ||
101 | typedef _go32_dpmi_registers __dpmi_regs; | |
102 | #define __tb _go32_info_block.linear_address_of_transfer_buffer | |
103 | #define _dos_ds _go32_info_block.selector_for_linear_memory | |
104 | ||
105 | static int | |
106 | __dpmi_int (intno, regs) | |
107 | int intno; | |
108 | __dpmi_regs *regs; | |
109 | { | |
110 | regs->x.ss = regs->x.sp = regs->x.flags = 0; | |
111 | return _go32_dpmi_simulate_int (intno, regs); | |
112 | } | |
113 | ||
114 | #endif /* __DJGPP__ < 2 */ | |
115 | \f | |
116 | /* C functions to access the Windows 3.1x clipboard from DOS apps. | |
117 | ||
118 | The information was obtained from the Microsoft Knowledge Base, | |
119 | article Q67675 and can be found at: | |
120 | http://www.microsoft.com/kb/developr/win_dk/q67675.htm */ | |
121 | ||
122 | /* See also Ralf Brown's Interrupt List. | |
123 | ||
124 | I also seem to remember reading about this in Dr. Dobbs Journal a | |
125 | while ago, but if you knew my memory... :-) | |
126 | ||
127 | Dale P. Smith <dpsm@en.com> */ | |
128 | ||
129 | /* Return the WinOldAp support version, or 0x1700 if not supported. */ | |
130 | unsigned | |
131 | identify_winoldap_version () | |
132 | { | |
133 | __dpmi_regs regs; | |
134 | ||
135 | /* Calls Int 2Fh/AX=1700h | |
136 | Return Values AX == 1700H: Clipboard functions not available | |
137 | <> 1700H: AL = Major version number | |
138 | AH = Minor version number */ | |
139 | regs.x.ax = 0x1700; | |
140 | __dpmi_int(0x2f, ®s); | |
141 | return regs.x.ax; | |
142 | } | |
143 | ||
144 | /* Open the clipboard, return non-zero if successfull. */ | |
145 | unsigned | |
146 | open_clipboard () | |
147 | { | |
148 | __dpmi_regs regs; | |
149 | ||
150 | /* Is WINOLDAP supported? */ | |
151 | /* Kludge alert!! If WinOldAp is not supported, we return a 0, | |
152 | which is the same as ``Clipboard already open''. Currently, | |
153 | this is taken as an error by all the functions that use | |
154 | `open_clipboard', but if somebody someday will use that ``open'' | |
155 | clipboard, they will have interesting time debugging it... */ | |
156 | if (identify_winoldap_version () == 0x1700) | |
157 | return 0; | |
158 | ||
159 | /* Calls Int 2Fh/AX=1701h | |
160 | Return Values AX == 0: Clipboard already open | |
161 | <> 0: Clipboard opened */ | |
162 | regs.x.ax = 0x1701; | |
163 | __dpmi_int(0x2f, ®s); | |
164 | return regs.x.ax; | |
165 | } | |
166 | ||
167 | /* Empty clipboard, return non-zero if successfull. */ | |
168 | unsigned | |
169 | empty_clipboard () | |
170 | { | |
171 | __dpmi_regs regs; | |
8de1855e | 172 | |
21cfcccf EZ |
173 | /* Calls Int 2Fh/AX=1702h |
174 | Return Values AX == 0: Error occurred | |
175 | <> 0: OK, Clipboard emptied */ | |
176 | regs.x.ax = 0x1702; | |
177 | __dpmi_int(0x2f, ®s); | |
178 | return regs.x.ax; | |
179 | } | |
180 | ||
181 | /* Ensure we have a buffer in low memory with enough memory for data | |
182 | of size WANT_SIZE. Return the linear address of the buffer. */ | |
183 | static unsigned long | |
184 | alloc_xfer_buf (want_size) | |
185 | unsigned want_size; | |
186 | { | |
187 | __dpmi_regs regs; | |
188 | ||
189 | /* If the usual DJGPP transfer buffer is large enough, use that. */ | |
190 | if (want_size <= _go32_info_block.size_of_transfer_buffer) | |
191 | return __tb & 0xfffff; | |
192 | ||
767079a8 EZ |
193 | /* Don't even try to allocate more than 1MB of memory: DOS cannot |
194 | possibly handle that (it will overflow the BX register below). */ | |
195 | if (want_size > 0xfffff) | |
196 | return 0; | |
197 | ||
21cfcccf EZ |
198 | /* Need size rounded up to the nearest paragraph, and in |
199 | paragraph units (1 paragraph = 16 bytes). */ | |
200 | clipboard_xfer_buf_info.size = (want_size + 15) >> 4; | |
201 | ||
202 | /* The NT DPMI host crashes us if we free DOS memory via the | |
203 | DPMI service. Work around by calling DOS allocate/free block. */ | |
204 | regs.h.ah = 0x48; | |
205 | regs.x.bx = clipboard_xfer_buf_info.size; | |
206 | __dpmi_int (0x21, ®s); | |
207 | if (regs.x.flags & 1) | |
208 | { | |
209 | clipboard_xfer_buf_info.size = 0; | |
210 | return 0; | |
211 | } | |
212 | ||
213 | clipboard_xfer_buf_info.rm_segment = regs.x.ax; | |
214 | return (((int)clipboard_xfer_buf_info.rm_segment) << 4) & 0xfffff; | |
215 | } | |
216 | ||
217 | /* Free our clipboard buffer. We always free it after use, because | |
218 | keeping it leaves less free conventional memory for subprocesses. | |
219 | The clipboard buffer tends to be large in size, because for small | |
220 | clipboard data sizes we use the DJGPP transfer buffer. */ | |
221 | static void | |
222 | free_xfer_buf () | |
223 | { | |
224 | /* If the size is 0, we used DJGPP transfer buffer, so don't free. */ | |
225 | if (clipboard_xfer_buf_info.size) | |
226 | { | |
227 | __dpmi_regs regs; | |
228 | ||
229 | /* The NT DPMI host crashes us if we free DOS memory via | |
230 | the DPMI service. Work around by calling DOS free block. */ | |
231 | regs.h.ah = 0x49; | |
232 | regs.x.es = clipboard_xfer_buf_info.rm_segment; | |
233 | __dpmi_int (0x21, ®s); | |
234 | clipboard_xfer_buf_info.size = 0; | |
235 | } | |
236 | } | |
237 | ||
0265f89f | 238 | /* Copy data into the clipboard, return zero if successfull. */ |
21cfcccf | 239 | unsigned |
583f5d53 | 240 | set_clipboard_data (Format, Data, Size, Raw) |
21cfcccf EZ |
241 | unsigned Format; |
242 | void *Data; | |
243 | unsigned Size; | |
583f5d53 | 244 | int Raw; |
21cfcccf EZ |
245 | { |
246 | __dpmi_regs regs; | |
247 | unsigned truelen; | |
248 | unsigned long xbuf_addr, buf_offset; | |
249 | unsigned char *dp = Data, *dstart = dp; | |
250 | ||
538d05bb | 251 | if (Format != CF_OEMTEXT) |
aae41d97 | 252 | return 3; |
21cfcccf EZ |
253 | |
254 | /* need to know final size after '\r' chars are inserted (the | |
538d05bb | 255 | standard CF_OEMTEXT clipboard format uses CRLF line endings, |
21cfcccf | 256 | while Emacs uses just LF internally). */ |
0265f89f | 257 | truelen = Size + 1; /* +1 for the terminating null */ |
583f5d53 EZ |
258 | |
259 | if (!Raw) | |
21cfcccf | 260 | { |
583f5d53 EZ |
261 | /* avoid using strchr because it recomputes the length everytime */ |
262 | while ((dp = memchr (dp, '\n', Size - (dp - dstart))) != 0) | |
263 | { | |
264 | truelen++; | |
265 | dp++; | |
266 | } | |
21cfcccf EZ |
267 | } |
268 | ||
269 | if (clipboard_compact (truelen) < truelen) | |
aae41d97 | 270 | return 1; |
21cfcccf EZ |
271 | |
272 | if ((xbuf_addr = alloc_xfer_buf (truelen)) == 0) | |
aae41d97 | 273 | return 1; |
21cfcccf | 274 | |
583f5d53 EZ |
275 | /* Move the buffer into the low memory, convert LF into CR-LF if needed. */ |
276 | if (Raw) | |
0236e3f1 EZ |
277 | { |
278 | dosmemput (Data, Size, xbuf_addr); | |
279 | ||
280 | /* Terminate with a null, otherwise Windows does strange things | |
281 | when the text size is an integral multiple of 32 bytes. */ | |
282 | _farpokeb (_dos_ds, xbuf_addr + Size, '\0'); | |
283 | } | |
583f5d53 | 284 | else |
21cfcccf | 285 | { |
583f5d53 EZ |
286 | dp = Data; |
287 | buf_offset = xbuf_addr; | |
288 | _farsetsel (_dos_ds); | |
289 | while (Size--) | |
290 | { | |
0265f89f EZ |
291 | /* Don't allow them to put binary data into the clipboard, since |
292 | it will cause yanked data to be truncated at the first null. */ | |
293 | if (*dp == '\0') | |
294 | return 2; | |
583f5d53 EZ |
295 | if (*dp == '\n') |
296 | _farnspokeb (buf_offset++, '\r'); | |
297 | _farnspokeb (buf_offset++, *dp++); | |
298 | } | |
21cfcccf | 299 | |
0236e3f1 EZ |
300 | /* Terminate with a null, otherwise Windows does strange things |
301 | when the text size is an integral multiple of 32 bytes. */ | |
302 | _farnspokeb (buf_offset, '\0'); | |
303 | } | |
0265f89f | 304 | |
5033894e EZ |
305 | /* Stash away the data we are about to put into the clipboard, so we |
306 | could later check inside get_clipboard_data whether the clipboard | |
307 | still holds our data. */ | |
308 | if (clipboard_storage_size < truelen) | |
309 | { | |
310 | clipboard_storage_size = truelen + 100; | |
311 | last_clipboard_text = | |
312 | (char *) xrealloc (last_clipboard_text, clipboard_storage_size); | |
313 | } | |
314 | if (last_clipboard_text) | |
315 | dosmemget (xbuf_addr, truelen, last_clipboard_text); | |
316 | ||
21cfcccf EZ |
317 | /* Calls Int 2Fh/AX=1703h with: |
318 | DX = WinOldAp-Supported Clipboard format | |
319 | ES:BX = Pointer to data | |
320 | SI:CX = Size of data in bytes | |
321 | Return Values AX == 0: Error occurred | |
322 | <> 0: OK. Data copied into the Clipboard. */ | |
323 | regs.x.ax = 0x1703; | |
324 | regs.x.dx = Format; | |
325 | regs.x.si = truelen >> 16; | |
326 | regs.x.cx = truelen & 0xffff; | |
327 | regs.x.es = xbuf_addr >> 4; | |
328 | regs.x.bx = xbuf_addr & 15; | |
329 | __dpmi_int(0x2f, ®s); | |
330 | ||
331 | free_xfer_buf (); | |
332 | ||
5033894e EZ |
333 | /* If the above failed, invalidate the local copy of the clipboard. */ |
334 | if (regs.x.ax == 0) | |
335 | *last_clipboard_text = '\0'; | |
336 | ||
aae41d97 EZ |
337 | /* Zero means success, otherwise (1, 2, or 3) it's an error. */ |
338 | return regs.x.ax > 0 ? 0 : 3; | |
21cfcccf EZ |
339 | } |
340 | ||
341 | /* Return the size of the clipboard data of format FORMAT. */ | |
342 | unsigned | |
343 | get_clipboard_data_size (Format) | |
344 | unsigned Format; | |
345 | { | |
346 | __dpmi_regs regs; | |
347 | ||
348 | /* Calls Int 2Fh/AX=1704h with: | |
349 | DX = WinOldAp-Supported Clipboard format | |
350 | Return Values DX:AX == Size of the data in bytes, including any | |
351 | headers. | |
352 | == 0 If data in this format is not in | |
353 | the clipboard. */ | |
354 | regs.x.ax = 0x1704; | |
355 | regs.x.dx = Format; | |
356 | __dpmi_int(0x2f, ®s); | |
357 | return ( (((unsigned)regs.x.dx) << 16) | regs.x.ax); | |
358 | } | |
359 | ||
360 | /* Get clipboard data, return its length. | |
361 | Warning: this doesn't check whether DATA has enough space to hold | |
362 | SIZE bytes. */ | |
363 | unsigned | |
583f5d53 | 364 | get_clipboard_data (Format, Data, Size, Raw) |
21cfcccf EZ |
365 | unsigned Format; |
366 | void *Data; | |
367 | unsigned Size; | |
583f5d53 | 368 | int Raw; |
21cfcccf EZ |
369 | { |
370 | __dpmi_regs regs; | |
21cfcccf EZ |
371 | unsigned long xbuf_addr; |
372 | unsigned char *dp = Data; | |
373 | ||
538d05bb | 374 | if (Format != CF_OEMTEXT) |
21cfcccf EZ |
375 | return 0; |
376 | ||
377 | if (Size == 0) | |
378 | return 0; | |
379 | ||
380 | if ((xbuf_addr = alloc_xfer_buf (Size)) == 0) | |
381 | return 0; | |
382 | ||
383 | /* Calls Int 2Fh/AX=1705h with: | |
384 | DX = WinOldAp-Supported Clipboard format | |
385 | ES:BX = Pointer to data buffer to hold data | |
386 | Return Values AX == 0: Error occurred (or data in this format is not | |
387 | in the clipboard) | |
388 | <> 0: OK */ | |
389 | regs.x.ax = 0x1705; | |
390 | regs.x.dx = Format; | |
391 | regs.x.es = xbuf_addr >> 4; | |
392 | regs.x.bx = xbuf_addr & 15; | |
393 | __dpmi_int(0x2f, ®s); | |
394 | if (regs.x.ax != 0) | |
395 | { | |
5033894e EZ |
396 | unsigned char null_char = '\0'; |
397 | unsigned long xbuf_beg = xbuf_addr; | |
398 | ||
399 | /* If last_clipboard_text is NULL, we don't want to slow down | |
400 | the next loop by an additional test. */ | |
401 | register unsigned char *lcdp = | |
402 | last_clipboard_text == NULL ? &null_char : last_clipboard_text; | |
8de1855e | 403 | |
583f5d53 EZ |
404 | /* Copy data from low memory, remove CR |
405 | characters before LF if needed. */ | |
21cfcccf EZ |
406 | _farsetsel (_dos_ds); |
407 | while (Size--) | |
408 | { | |
409 | register unsigned char c = _farnspeekb (xbuf_addr++); | |
410 | ||
5033894e EZ |
411 | if (*lcdp == c) |
412 | lcdp++; | |
413 | ||
583f5d53 | 414 | if ((*dp++ = c) == '\r' && !Raw && _farnspeekb (xbuf_addr) == '\n') |
21cfcccf EZ |
415 | { |
416 | dp--; | |
417 | *dp++ = '\n'; | |
418 | xbuf_addr++; | |
5033894e EZ |
419 | if (*lcdp == '\n') |
420 | lcdp++; | |
21cfcccf EZ |
421 | } |
422 | /* Windows reportedly rounds up the size of clipboard data | |
4029384b EZ |
423 | (passed in SIZE) to a multiple of 32, and removes trailing |
424 | spaces from each line without updating SIZE. We therefore | |
425 | bail out when we see the first null character. */ | |
426 | else if (c == '\0') | |
0265f89f | 427 | break; |
21cfcccf | 428 | } |
5033894e EZ |
429 | |
430 | /* If the text in clipboard is identical to what we put there | |
431 | last time set_clipboard_data was called, pretend there's no | |
432 | data in the clipboard. This is so we don't pass our own text | |
4029384b EZ |
433 | from the clipboard (which might be troublesome if the killed |
434 | text includes null characters). */ | |
5033894e EZ |
435 | if (last_clipboard_text && |
436 | xbuf_addr - xbuf_beg == (long)(lcdp - last_clipboard_text)) | |
437 | dp = (unsigned char *)Data + 1; | |
21cfcccf EZ |
438 | } |
439 | ||
440 | free_xfer_buf (); | |
441 | ||
0265f89f | 442 | return (unsigned) (dp - (unsigned char *)Data - 1); |
21cfcccf EZ |
443 | } |
444 | ||
445 | /* Close clipboard, return non-zero if successfull. */ | |
446 | unsigned | |
447 | close_clipboard () | |
448 | { | |
449 | __dpmi_regs regs; | |
450 | ||
451 | /* Calls Int 2Fh/AX=1708h | |
452 | Return Values AX == 0: Error occurred | |
453 | <> 0: OK */ | |
454 | regs.x.ax = 0x1708; | |
455 | __dpmi_int(0x2f, ®s); | |
456 | return regs.x.ax; | |
457 | } | |
458 | ||
459 | /* Compact clipboard data so that at least SIZE bytes is available. */ | |
460 | unsigned | |
461 | clipboard_compact (Size) | |
462 | unsigned Size; | |
463 | { | |
464 | __dpmi_regs regs; | |
465 | ||
466 | /* Calls Int 2Fh/AX=1709H with: | |
467 | SI:CX = Desired memory size in bytes. | |
468 | Return Values DX:AX == Number of bytes of largest block of free memory. | |
469 | == 0 if error or no memory */ | |
470 | regs.x.ax = 0x1709; | |
471 | regs.x.si = Size >> 16; | |
472 | regs.x.cx = Size & 0xffff; | |
473 | __dpmi_int(0x2f, ®s); | |
474 | return ((unsigned)regs.x.dx << 16) | regs.x.ax; | |
475 | } | |
476 | \f | |
477 | static char no_mem_msg[] = | |
478 | "(Not enough DOS memory to put saved text into clipboard.)"; | |
0265f89f EZ |
479 | static char binary_msg[] = |
480 | "(Binary characters in saved text; clipboard data not set.)"; | |
aae41d97 EZ |
481 | static char system_error_msg[] = |
482 | "(Clipboard interface failure; clipboard data not set.)"; | |
21cfcccf | 483 | |
767079a8 | 484 | DEFUN ("w16-set-clipboard-data", Fw16_set_clipboard_data, Sw16_set_clipboard_data, 1, 2, 0, |
70da46c3 PJ |
485 | doc: /* This sets the clipboard data to the given text. */) |
486 | (string, frame) | |
487 | Lisp_Object string, frame; | |
21cfcccf | 488 | { |
0265f89f | 489 | unsigned ok = 1, put_status = 0; |
8de1855e | 490 | int nbytes, charset_info, no_crlf_conversion; |
583f5d53 | 491 | unsigned char *src, *dst = NULL; |
21cfcccf | 492 | |
b7826503 | 493 | CHECK_STRING (string); |
3276b4fe | 494 | |
21cfcccf EZ |
495 | if (NILP (frame)) |
496 | frame = Fselected_frame (); | |
497 | ||
b7826503 | 498 | CHECK_LIVE_FRAME (frame); |
21cfcccf EZ |
499 | if ( !FRAME_MSDOS_P (XFRAME (frame))) |
500 | goto done; | |
3276b4fe | 501 | |
21cfcccf EZ |
502 | BLOCK_INPUT; |
503 | ||
1b912a3b EZ |
504 | if (!open_clipboard ()) |
505 | goto error; | |
506 | ||
d5db4077 KR |
507 | nbytes = SBYTES (string); |
508 | src = SDATA (string); | |
583f5d53 | 509 | |
9b317797 EZ |
510 | /* Do we need to encode this text? */ |
511 | for (dst = src; dst < src + nbytes; dst++) | |
512 | { | |
513 | if (*dst == '\0' || *dst >= 0x80) | |
514 | break; | |
515 | } | |
516 | if (dst >= src + nbytes) | |
583f5d53 | 517 | { |
9b317797 | 518 | /* No multibyte characters in text. We need not encode it, but we |
583f5d53 EZ |
519 | will have to convert it to DOS CR-LF style. */ |
520 | no_crlf_conversion = 0; | |
9b317797 | 521 | Vlast_coding_system_used = Qraw_text; |
1b912a3b | 522 | dst = NULL; /* so we don't try to free a random pointer */ |
583f5d53 EZ |
523 | } |
524 | else | |
525 | { | |
526 | /* We must encode contents of STRING according to what | |
527 | clipboard-coding-system specifies. */ | |
528 | int bufsize; | |
529 | struct coding_system coding; | |
530 | unsigned char *htext2; | |
9b317797 EZ |
531 | Lisp_Object coding_system = |
532 | NILP (Vnext_selection_coding_system) ? | |
533 | Vselection_coding_system : Vnext_selection_coding_system; | |
583f5d53 | 534 | |
9b317797 EZ |
535 | setup_coding_system (Fcheck_coding_system (coding_system), &coding); |
536 | coding.dst_bytes = nbytes * 4; | |
537 | coding.destination = (unsigned char *) xmalloc (coding.dst_bytes); | |
9963e859 | 538 | Vnext_selection_coding_system = Qnil; |
583f5d53 | 539 | coding.mode |= CODING_MODE_LAST_BLOCK; |
9b317797 EZ |
540 | dst = coding.destination; |
541 | encode_coding_object (&coding, string, 0, 0, | |
542 | SCHARS (string), nbytes, Qnil); | |
583f5d53 | 543 | no_crlf_conversion = 1; |
c7594627 | 544 | nbytes = coding.produced; |
9b317797 | 545 | Vlast_coding_system_used = CODING_ID_NAME (coding.id); |
ba92a470 | 546 | src = dst; |
583f5d53 EZ |
547 | } |
548 | ||
583f5d53 | 549 | ok = empty_clipboard () |
0265f89f | 550 | && ((put_status |
ba92a470 | 551 | = set_clipboard_data (CF_OEMTEXT, src, nbytes, no_crlf_conversion)) |
0265f89f | 552 | == 0); |
583f5d53 EZ |
553 | |
554 | if (!no_crlf_conversion) | |
21cfcccf | 555 | close_clipboard (); |
3276b4fe | 556 | |
31354c30 | 557 | if (ok) goto unblock; |
21cfcccf EZ |
558 | |
559 | error: | |
3276b4fe | 560 | |
21cfcccf EZ |
561 | ok = 0; |
562 | ||
31354c30 | 563 | unblock: |
70fdbb46 | 564 | xfree (dst); |
31354c30 EZ |
565 | UNBLOCK_INPUT; |
566 | ||
21cfcccf EZ |
567 | /* Notify user if the text is too large to fit into DOS memory. |
568 | (This will happen somewhere after 600K bytes (470K in DJGPP v1.x), | |
569 | depending on user system configuration.) If we just silently | |
570 | fail the function, people might wonder why their text sometimes | |
571 | doesn't make it to the clipboard. */ | |
0265f89f | 572 | if (put_status) |
21cfcccf | 573 | { |
0265f89f EZ |
574 | switch (put_status) |
575 | { | |
576 | case 1: | |
577 | message2 (no_mem_msg, sizeof (no_mem_msg) - 1, 0); | |
578 | break; | |
579 | case 2: | |
580 | message2 (binary_msg, sizeof (binary_msg) - 1, 0); | |
581 | break; | |
aae41d97 EZ |
582 | case 3: |
583 | message2 (system_error_msg, sizeof (system_error_msg) - 1, 0); | |
584 | break; | |
0265f89f | 585 | } |
b33e80aa | 586 | sit_for (make_number (2), 0, 2); |
21cfcccf | 587 | } |
3276b4fe | 588 | |
21cfcccf | 589 | done: |
21cfcccf | 590 | |
0265f89f | 591 | return (ok && put_status == 0 ? string : Qnil); |
21cfcccf EZ |
592 | } |
593 | ||
767079a8 | 594 | DEFUN ("w16-get-clipboard-data", Fw16_get_clipboard_data, Sw16_get_clipboard_data, 0, 1, 0, |
70da46c3 | 595 | doc: /* This gets the clipboard data in text format. */) |
21cfcccf EZ |
596 | (frame) |
597 | Lisp_Object frame; | |
598 | { | |
599 | unsigned data_size, truelen; | |
1b912a3b | 600 | unsigned char *htext = NULL; |
21cfcccf | 601 | Lisp_Object ret = Qnil; |
9b317797 | 602 | int no_crlf_conversion, require_decoding = 0; |
583f5d53 | 603 | |
21cfcccf EZ |
604 | if (NILP (frame)) |
605 | frame = Fselected_frame (); | |
606 | ||
b7826503 | 607 | CHECK_LIVE_FRAME (frame); |
21cfcccf EZ |
608 | if ( !FRAME_MSDOS_P (XFRAME (frame))) |
609 | goto done; | |
3276b4fe | 610 | |
21cfcccf | 611 | BLOCK_INPUT; |
3276b4fe | 612 | |
21cfcccf | 613 | if (!open_clipboard ()) |
31354c30 | 614 | goto unblock; |
21cfcccf | 615 | |
538d05bb | 616 | if ((data_size = get_clipboard_data_size (CF_OEMTEXT)) == 0 || |
21cfcccf EZ |
617 | (htext = (unsigned char *)xmalloc (data_size)) == 0) |
618 | goto closeclip; | |
619 | ||
620 | /* need to know final size after '\r' chars are removed because | |
621 | we can't change the string size manually, and doing an extra | |
622 | copy is silly */ | |
538d05bb | 623 | if ((truelen = get_clipboard_data (CF_OEMTEXT, htext, data_size, 0)) == 0) |
21cfcccf EZ |
624 | goto closeclip; |
625 | ||
583f5d53 | 626 | /* Do we need to decode it? */ |
3276b4fe EZ |
627 | { |
628 | /* If the clipboard data contains any 8-bit Latin-1 code, we | |
629 | need to decode it. */ | |
630 | int i; | |
631 | ||
632 | for (i = 0; i < truelen; i++) | |
633 | { | |
634 | if (htext[i] >= 0x80) | |
635 | { | |
9b317797 | 636 | require_decoding = 1; |
3276b4fe EZ |
637 | break; |
638 | } | |
639 | } | |
640 | } | |
9b317797 | 641 | if (require_decoding) |
583f5d53 EZ |
642 | { |
643 | int bufsize; | |
644 | unsigned char *buf; | |
645 | struct coding_system coding; | |
9b317797 | 646 | Lisp_Object coding_system = Vnext_selection_coding_system; |
583f5d53 | 647 | |
9b317797 EZ |
648 | truelen = get_clipboard_data (CF_OEMTEXT, htext, data_size, 1); |
649 | if (NILP (coding_system)) | |
650 | coding_system = Vselection_coding_system; | |
651 | setup_coding_system (Fcheck_coding_system (coding_system), &coding); | |
652 | coding.source = htext; | |
583f5d53 | 653 | coding.mode |= CODING_MODE_LAST_BLOCK; |
9b317797 | 654 | /* We explicitly disable composition handling because selection |
ee826e00 | 655 | data should not contain any composition sequence. */ |
9b317797 EZ |
656 | coding.mode &= CODING_ANNOTATION_MASK; |
657 | decode_coding_object (&coding, Qnil, 0, 0, truelen, truelen, Qt); | |
658 | ret = coding.dst_object; | |
659 | Vlast_coding_system_used = CODING_ID_NAME (coding.id); | |
583f5d53 EZ |
660 | } |
661 | else | |
662 | { | |
663 | ret = make_unibyte_string ((char *) htext, truelen); | |
664 | Vlast_coding_system_used = Qraw_text; | |
665 | } | |
666 | ||
21cfcccf | 667 | xfree (htext); |
9b317797 | 668 | Vnext_selection_coding_system = Qnil; |
21cfcccf EZ |
669 | |
670 | closeclip: | |
671 | close_clipboard (); | |
31354c30 EZ |
672 | |
673 | unblock: | |
674 | UNBLOCK_INPUT; | |
8de1855e | 675 | |
21cfcccf | 676 | done: |
8de1855e | 677 | |
21cfcccf EZ |
678 | return (ret); |
679 | } | |
680 | ||
681 | /* Support checking for a clipboard selection. */ | |
682 | ||
683 | DEFUN ("x-selection-exists-p", Fx_selection_exists_p, Sx_selection_exists_p, | |
70da46c3 PJ |
684 | 0, 1, 0, |
685 | doc: /* Whether there is an owner for the given X Selection. | |
686 | The arg should be the name of the selection in question, typically one of | |
687 | the symbols `PRIMARY', `SECONDARY', or `CLIPBOARD'. | |
688 | \(Those are literal upper-case symbol names, since that's what X expects.) | |
689 | For convenience, the symbol nil is the same as `PRIMARY', | |
690 | and t is the same as `SECONDARY'. */) | |
691 | (selection) | |
21cfcccf EZ |
692 | Lisp_Object selection; |
693 | { | |
b7826503 | 694 | CHECK_SYMBOL (selection); |
21cfcccf EZ |
695 | |
696 | /* Return nil for SECONDARY selection. For PRIMARY (or nil) | |
697 | selection, check if there is some text on the kill-ring; | |
698 | for CLIPBOARD, check if the clipboard currently has valid | |
699 | text format contents. | |
700 | ||
701 | The test for killed text on the kill-ring emulates the Emacs | |
702 | behavior on X, where killed text is also put into X selection | |
703 | by the X interface code. (On MSDOS, killed text is only put | |
704 | into the clipboard if we run under Windows, so we cannot check | |
705 | the clipboard alone.) */ | |
706 | if ((EQ (selection, Qnil) || EQ (selection, QPRIMARY)) | |
a97569cb GM |
707 | && ! NILP (SYMBOL_VALUE (Fintern_soft (build_string ("kill-ring"), |
708 | Qnil)))) | |
21cfcccf EZ |
709 | return Qt; |
710 | ||
711 | if (EQ (selection, QCLIPBOARD)) | |
712 | { | |
713 | Lisp_Object val = Qnil; | |
714 | ||
715 | if (open_clipboard ()) | |
716 | { | |
538d05bb | 717 | if (get_clipboard_data_size (CF_OEMTEXT)) |
21cfcccf EZ |
718 | val = Qt; |
719 | close_clipboard (); | |
720 | } | |
721 | return val; | |
722 | } | |
723 | return Qnil; | |
724 | } | |
725 | ||
8de1855e | 726 | void |
21cfcccf EZ |
727 | syms_of_win16select () |
728 | { | |
767079a8 EZ |
729 | defsubr (&Sw16_set_clipboard_data); |
730 | defsubr (&Sw16_get_clipboard_data); | |
21cfcccf EZ |
731 | defsubr (&Sx_selection_exists_p); |
732 | ||
199c7c44 | 733 | DEFVAR_LISP ("selection-coding-system", &Vselection_coding_system, |
70da46c3 PJ |
734 | doc: /* Coding system for communicating with other X clients. |
735 | When sending or receiving text via cut_buffer, selection, and clipboard, | |
736 | the text is encoded or decoded by this coding system. | |
b45b1e81 JB |
737 | The default value is `iso-latin-1-dos'. */); |
738 | Vselection_coding_system = intern ("iso-latin-1-dos"); | |
9963e859 EZ |
739 | |
740 | DEFVAR_LISP ("next-selection-coding-system", &Vnext_selection_coding_system, | |
70da46c3 PJ |
741 | doc: /* Coding system for the next communication with other X clients. |
742 | Usually, `selection-coding-system' is used for communicating with | |
b1abeb71 JB |
743 | other X clients. But, if this variable is set, it is used for the |
744 | next communication only. After the communication, this variable is | |
70da46c3 | 745 | set to nil. */); |
9963e859 | 746 | Vnext_selection_coding_system = Qnil; |
583f5d53 | 747 | |
21cfcccf EZ |
748 | QPRIMARY = intern ("PRIMARY"); staticpro (&QPRIMARY); |
749 | QCLIPBOARD = intern ("CLIPBOARD"); staticpro (&QCLIPBOARD); | |
750 | } | |
751 | ||
752 | #endif /* MSDOS */ | |
6b61353c KH |
753 | |
754 | /* arch-tag: 085a22c8-7324-436e-a6da-102464ce95d8 | |
755 | (do not change this comment) */ |