Commit | Line | Data |
---|---|---|
767079a8 | 1 | /* 16-bit Windows Selection processing for emacs on MS-Windows |
e9bffc61 | 2 | |
73b0cd50 | 3 | Copyright (C) 1996-1997, 2001-2011 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> */ | |
ed68db4d | 26 | /* Adapted to DJGPP by Eli Zaretskii <eliz@gnu.org> */ |
21cfcccf EZ |
27 | |
28 | #ifdef MSDOS | |
29 | ||
30 | #include <config.h> | |
21cfcccf EZ |
31 | #include <dpmi.h> |
32 | #include <go32.h> | |
33 | #include <sys/farptr.h> | |
d7306fe6 | 34 | #include <setjmp.h> |
21cfcccf EZ |
35 | #include "lisp.h" |
36 | #include "dispextern.h" /* frame.h seems to want this */ | |
37 | #include "frame.h" /* Need this to get the X window of selected_frame */ | |
38 | #include "blockinput.h" | |
583f5d53 | 39 | #include "buffer.h" |
83be827a | 40 | #include "character.h" |
583f5d53 | 41 | #include "coding.h" |
f7d05dc4 | 42 | #include "composite.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 | ||
71 | /* The segment address and the size of the buffer in low | |
72 | memory used to move data between us and WinOldAp module. */ | |
21cfcccf EZ |
73 | static struct { |
74 | unsigned long size; | |
75 | unsigned short rm_segment; | |
76 | } clipboard_xfer_buf_info; | |
5033894e EZ |
77 | |
78 | /* The last text we put into the clipboard. This is used to prevent | |
79 | passing back our own text from the clipboard, instead of using the | |
80 | kill ring. The former is undesirable because the clipboard data | |
81 | could be MULEtilated by inappropriately chosen | |
82 | (next-)selection-coding-system. For this reason, we must store the | |
83 | text *after* it was encoded/Unix-to-DOS-converted. */ | |
84 | static unsigned char *last_clipboard_text; | |
85 | ||
86 | /* The size of allocated storage for storing the clipboard data. */ | |
87 | static size_t clipboard_storage_size; | |
21cfcccf | 88 | \f |
21cfcccf EZ |
89 | /* C functions to access the Windows 3.1x clipboard from DOS apps. |
90 | ||
91 | The information was obtained from the Microsoft Knowledge Base, | |
92 | article Q67675 and can be found at: | |
93 | http://www.microsoft.com/kb/developr/win_dk/q67675.htm */ | |
94 | ||
95 | /* See also Ralf Brown's Interrupt List. | |
96 | ||
97 | I also seem to remember reading about this in Dr. Dobbs Journal a | |
98 | while ago, but if you knew my memory... :-) | |
99 | ||
100 | Dale P. Smith <dpsm@en.com> */ | |
101 | ||
102 | /* Return the WinOldAp support version, or 0x1700 if not supported. */ | |
103 | unsigned | |
3a8ce822 | 104 | identify_winoldap_version (void) |
21cfcccf EZ |
105 | { |
106 | __dpmi_regs regs; | |
107 | ||
108 | /* Calls Int 2Fh/AX=1700h | |
109 | Return Values AX == 1700H: Clipboard functions not available | |
110 | <> 1700H: AL = Major version number | |
111 | AH = Minor version number */ | |
112 | regs.x.ax = 0x1700; | |
113 | __dpmi_int(0x2f, ®s); | |
114 | return regs.x.ax; | |
115 | } | |
116 | ||
117 | /* Open the clipboard, return non-zero if successfull. */ | |
118 | unsigned | |
3a8ce822 | 119 | open_clipboard (void) |
21cfcccf EZ |
120 | { |
121 | __dpmi_regs regs; | |
122 | ||
123 | /* Is WINOLDAP supported? */ | |
124 | /* Kludge alert!! If WinOldAp is not supported, we return a 0, | |
125 | which is the same as ``Clipboard already open''. Currently, | |
126 | this is taken as an error by all the functions that use | |
127 | `open_clipboard', but if somebody someday will use that ``open'' | |
128 | clipboard, they will have interesting time debugging it... */ | |
129 | if (identify_winoldap_version () == 0x1700) | |
130 | return 0; | |
131 | ||
132 | /* Calls Int 2Fh/AX=1701h | |
133 | Return Values AX == 0: Clipboard already open | |
134 | <> 0: Clipboard opened */ | |
135 | regs.x.ax = 0x1701; | |
136 | __dpmi_int(0x2f, ®s); | |
137 | return regs.x.ax; | |
138 | } | |
139 | ||
140 | /* Empty clipboard, return non-zero if successfull. */ | |
141 | unsigned | |
3a8ce822 | 142 | empty_clipboard (void) |
21cfcccf EZ |
143 | { |
144 | __dpmi_regs regs; | |
8de1855e | 145 | |
21cfcccf EZ |
146 | /* Calls Int 2Fh/AX=1702h |
147 | Return Values AX == 0: Error occurred | |
148 | <> 0: OK, Clipboard emptied */ | |
149 | regs.x.ax = 0x1702; | |
150 | __dpmi_int(0x2f, ®s); | |
151 | return regs.x.ax; | |
152 | } | |
153 | ||
154 | /* Ensure we have a buffer in low memory with enough memory for data | |
155 | of size WANT_SIZE. Return the linear address of the buffer. */ | |
156 | static unsigned long | |
3a8ce822 | 157 | alloc_xfer_buf (unsigned want_size) |
21cfcccf EZ |
158 | { |
159 | __dpmi_regs regs; | |
160 | ||
161 | /* If the usual DJGPP transfer buffer is large enough, use that. */ | |
162 | if (want_size <= _go32_info_block.size_of_transfer_buffer) | |
163 | return __tb & 0xfffff; | |
164 | ||
767079a8 EZ |
165 | /* Don't even try to allocate more than 1MB of memory: DOS cannot |
166 | possibly handle that (it will overflow the BX register below). */ | |
167 | if (want_size > 0xfffff) | |
168 | return 0; | |
169 | ||
21cfcccf EZ |
170 | /* Need size rounded up to the nearest paragraph, and in |
171 | paragraph units (1 paragraph = 16 bytes). */ | |
172 | clipboard_xfer_buf_info.size = (want_size + 15) >> 4; | |
173 | ||
174 | /* The NT DPMI host crashes us if we free DOS memory via the | |
175 | DPMI service. Work around by calling DOS allocate/free block. */ | |
176 | regs.h.ah = 0x48; | |
177 | regs.x.bx = clipboard_xfer_buf_info.size; | |
178 | __dpmi_int (0x21, ®s); | |
179 | if (regs.x.flags & 1) | |
180 | { | |
181 | clipboard_xfer_buf_info.size = 0; | |
182 | return 0; | |
183 | } | |
184 | ||
185 | clipboard_xfer_buf_info.rm_segment = regs.x.ax; | |
186 | return (((int)clipboard_xfer_buf_info.rm_segment) << 4) & 0xfffff; | |
187 | } | |
188 | ||
189 | /* Free our clipboard buffer. We always free it after use, because | |
190 | keeping it leaves less free conventional memory for subprocesses. | |
191 | The clipboard buffer tends to be large in size, because for small | |
192 | clipboard data sizes we use the DJGPP transfer buffer. */ | |
193 | static void | |
3a8ce822 | 194 | free_xfer_buf (void) |
21cfcccf EZ |
195 | { |
196 | /* If the size is 0, we used DJGPP transfer buffer, so don't free. */ | |
197 | if (clipboard_xfer_buf_info.size) | |
198 | { | |
199 | __dpmi_regs regs; | |
200 | ||
201 | /* The NT DPMI host crashes us if we free DOS memory via | |
202 | the DPMI service. Work around by calling DOS free block. */ | |
203 | regs.h.ah = 0x49; | |
204 | regs.x.es = clipboard_xfer_buf_info.rm_segment; | |
205 | __dpmi_int (0x21, ®s); | |
206 | clipboard_xfer_buf_info.size = 0; | |
207 | } | |
208 | } | |
209 | ||
0265f89f | 210 | /* Copy data into the clipboard, return zero if successfull. */ |
21cfcccf | 211 | unsigned |
3a8ce822 | 212 | set_clipboard_data (unsigned Format, void *Data, unsigned Size, int Raw) |
21cfcccf EZ |
213 | { |
214 | __dpmi_regs regs; | |
215 | unsigned truelen; | |
216 | unsigned long xbuf_addr, buf_offset; | |
217 | unsigned char *dp = Data, *dstart = dp; | |
218 | ||
538d05bb | 219 | if (Format != CF_OEMTEXT) |
aae41d97 | 220 | return 3; |
21cfcccf EZ |
221 | |
222 | /* need to know final size after '\r' chars are inserted (the | |
538d05bb | 223 | standard CF_OEMTEXT clipboard format uses CRLF line endings, |
21cfcccf | 224 | while Emacs uses just LF internally). */ |
0265f89f | 225 | truelen = Size + 1; /* +1 for the terminating null */ |
583f5d53 EZ |
226 | |
227 | if (!Raw) | |
21cfcccf | 228 | { |
583f5d53 EZ |
229 | /* avoid using strchr because it recomputes the length everytime */ |
230 | while ((dp = memchr (dp, '\n', Size - (dp - dstart))) != 0) | |
231 | { | |
232 | truelen++; | |
233 | dp++; | |
234 | } | |
21cfcccf EZ |
235 | } |
236 | ||
237 | if (clipboard_compact (truelen) < truelen) | |
aae41d97 | 238 | return 1; |
21cfcccf EZ |
239 | |
240 | if ((xbuf_addr = alloc_xfer_buf (truelen)) == 0) | |
aae41d97 | 241 | return 1; |
21cfcccf | 242 | |
583f5d53 EZ |
243 | /* Move the buffer into the low memory, convert LF into CR-LF if needed. */ |
244 | if (Raw) | |
0236e3f1 EZ |
245 | { |
246 | dosmemput (Data, Size, xbuf_addr); | |
247 | ||
248 | /* Terminate with a null, otherwise Windows does strange things | |
249 | when the text size is an integral multiple of 32 bytes. */ | |
250 | _farpokeb (_dos_ds, xbuf_addr + Size, '\0'); | |
251 | } | |
583f5d53 | 252 | else |
21cfcccf | 253 | { |
583f5d53 EZ |
254 | dp = Data; |
255 | buf_offset = xbuf_addr; | |
256 | _farsetsel (_dos_ds); | |
257 | while (Size--) | |
258 | { | |
0265f89f EZ |
259 | /* Don't allow them to put binary data into the clipboard, since |
260 | it will cause yanked data to be truncated at the first null. */ | |
261 | if (*dp == '\0') | |
262 | return 2; | |
583f5d53 EZ |
263 | if (*dp == '\n') |
264 | _farnspokeb (buf_offset++, '\r'); | |
265 | _farnspokeb (buf_offset++, *dp++); | |
266 | } | |
21cfcccf | 267 | |
0236e3f1 EZ |
268 | /* Terminate with a null, otherwise Windows does strange things |
269 | when the text size is an integral multiple of 32 bytes. */ | |
270 | _farnspokeb (buf_offset, '\0'); | |
271 | } | |
0265f89f | 272 | |
5033894e EZ |
273 | /* Stash away the data we are about to put into the clipboard, so we |
274 | could later check inside get_clipboard_data whether the clipboard | |
275 | still holds our data. */ | |
276 | if (clipboard_storage_size < truelen) | |
277 | { | |
278 | clipboard_storage_size = truelen + 100; | |
279 | last_clipboard_text = | |
280 | (char *) xrealloc (last_clipboard_text, clipboard_storage_size); | |
281 | } | |
282 | if (last_clipboard_text) | |
283 | dosmemget (xbuf_addr, truelen, last_clipboard_text); | |
284 | ||
21cfcccf EZ |
285 | /* Calls Int 2Fh/AX=1703h with: |
286 | DX = WinOldAp-Supported Clipboard format | |
287 | ES:BX = Pointer to data | |
288 | SI:CX = Size of data in bytes | |
289 | Return Values AX == 0: Error occurred | |
290 | <> 0: OK. Data copied into the Clipboard. */ | |
291 | regs.x.ax = 0x1703; | |
292 | regs.x.dx = Format; | |
293 | regs.x.si = truelen >> 16; | |
294 | regs.x.cx = truelen & 0xffff; | |
295 | regs.x.es = xbuf_addr >> 4; | |
296 | regs.x.bx = xbuf_addr & 15; | |
297 | __dpmi_int(0x2f, ®s); | |
298 | ||
299 | free_xfer_buf (); | |
300 | ||
5033894e EZ |
301 | /* If the above failed, invalidate the local copy of the clipboard. */ |
302 | if (regs.x.ax == 0) | |
303 | *last_clipboard_text = '\0'; | |
304 | ||
aae41d97 EZ |
305 | /* Zero means success, otherwise (1, 2, or 3) it's an error. */ |
306 | return regs.x.ax > 0 ? 0 : 3; | |
21cfcccf EZ |
307 | } |
308 | ||
309 | /* Return the size of the clipboard data of format FORMAT. */ | |
310 | unsigned | |
3a8ce822 | 311 | get_clipboard_data_size (unsigned Format) |
21cfcccf EZ |
312 | { |
313 | __dpmi_regs regs; | |
314 | ||
315 | /* Calls Int 2Fh/AX=1704h with: | |
316 | DX = WinOldAp-Supported Clipboard format | |
317 | Return Values DX:AX == Size of the data in bytes, including any | |
318 | headers. | |
319 | == 0 If data in this format is not in | |
320 | the clipboard. */ | |
321 | regs.x.ax = 0x1704; | |
322 | regs.x.dx = Format; | |
323 | __dpmi_int(0x2f, ®s); | |
324 | return ( (((unsigned)regs.x.dx) << 16) | regs.x.ax); | |
325 | } | |
326 | ||
327 | /* Get clipboard data, return its length. | |
328 | Warning: this doesn't check whether DATA has enough space to hold | |
329 | SIZE bytes. */ | |
330 | unsigned | |
3a8ce822 | 331 | get_clipboard_data (unsigned Format, void *Data, unsigned Size, int Raw) |
21cfcccf EZ |
332 | { |
333 | __dpmi_regs regs; | |
21cfcccf EZ |
334 | unsigned long xbuf_addr; |
335 | unsigned char *dp = Data; | |
336 | ||
538d05bb | 337 | if (Format != CF_OEMTEXT) |
21cfcccf EZ |
338 | return 0; |
339 | ||
340 | if (Size == 0) | |
341 | return 0; | |
342 | ||
343 | if ((xbuf_addr = alloc_xfer_buf (Size)) == 0) | |
344 | return 0; | |
345 | ||
346 | /* Calls Int 2Fh/AX=1705h with: | |
347 | DX = WinOldAp-Supported Clipboard format | |
348 | ES:BX = Pointer to data buffer to hold data | |
349 | Return Values AX == 0: Error occurred (or data in this format is not | |
350 | in the clipboard) | |
351 | <> 0: OK */ | |
352 | regs.x.ax = 0x1705; | |
353 | regs.x.dx = Format; | |
354 | regs.x.es = xbuf_addr >> 4; | |
355 | regs.x.bx = xbuf_addr & 15; | |
356 | __dpmi_int(0x2f, ®s); | |
357 | if (regs.x.ax != 0) | |
358 | { | |
5033894e EZ |
359 | unsigned char null_char = '\0'; |
360 | unsigned long xbuf_beg = xbuf_addr; | |
361 | ||
362 | /* If last_clipboard_text is NULL, we don't want to slow down | |
363 | the next loop by an additional test. */ | |
364 | register unsigned char *lcdp = | |
365 | last_clipboard_text == NULL ? &null_char : last_clipboard_text; | |
8de1855e | 366 | |
583f5d53 EZ |
367 | /* Copy data from low memory, remove CR |
368 | characters before LF if needed. */ | |
21cfcccf EZ |
369 | _farsetsel (_dos_ds); |
370 | while (Size--) | |
371 | { | |
372 | register unsigned char c = _farnspeekb (xbuf_addr++); | |
373 | ||
5033894e EZ |
374 | if (*lcdp == c) |
375 | lcdp++; | |
376 | ||
583f5d53 | 377 | if ((*dp++ = c) == '\r' && !Raw && _farnspeekb (xbuf_addr) == '\n') |
21cfcccf EZ |
378 | { |
379 | dp--; | |
380 | *dp++ = '\n'; | |
381 | xbuf_addr++; | |
5033894e EZ |
382 | if (*lcdp == '\n') |
383 | lcdp++; | |
21cfcccf EZ |
384 | } |
385 | /* Windows reportedly rounds up the size of clipboard data | |
4029384b EZ |
386 | (passed in SIZE) to a multiple of 32, and removes trailing |
387 | spaces from each line without updating SIZE. We therefore | |
388 | bail out when we see the first null character. */ | |
389 | else if (c == '\0') | |
0265f89f | 390 | break; |
21cfcccf | 391 | } |
5033894e EZ |
392 | |
393 | /* If the text in clipboard is identical to what we put there | |
394 | last time set_clipboard_data was called, pretend there's no | |
395 | data in the clipboard. This is so we don't pass our own text | |
4029384b EZ |
396 | from the clipboard (which might be troublesome if the killed |
397 | text includes null characters). */ | |
5033894e EZ |
398 | if (last_clipboard_text && |
399 | xbuf_addr - xbuf_beg == (long)(lcdp - last_clipboard_text)) | |
400 | dp = (unsigned char *)Data + 1; | |
21cfcccf EZ |
401 | } |
402 | ||
403 | free_xfer_buf (); | |
404 | ||
0265f89f | 405 | return (unsigned) (dp - (unsigned char *)Data - 1); |
21cfcccf EZ |
406 | } |
407 | ||
408 | /* Close clipboard, return non-zero if successfull. */ | |
409 | unsigned | |
3a8ce822 | 410 | close_clipboard (void) |
21cfcccf EZ |
411 | { |
412 | __dpmi_regs regs; | |
413 | ||
414 | /* Calls Int 2Fh/AX=1708h | |
415 | Return Values AX == 0: Error occurred | |
416 | <> 0: OK */ | |
417 | regs.x.ax = 0x1708; | |
418 | __dpmi_int(0x2f, ®s); | |
419 | return regs.x.ax; | |
420 | } | |
421 | ||
422 | /* Compact clipboard data so that at least SIZE bytes is available. */ | |
423 | unsigned | |
3a8ce822 | 424 | clipboard_compact (unsigned Size) |
21cfcccf EZ |
425 | { |
426 | __dpmi_regs regs; | |
427 | ||
428 | /* Calls Int 2Fh/AX=1709H with: | |
429 | SI:CX = Desired memory size in bytes. | |
430 | Return Values DX:AX == Number of bytes of largest block of free memory. | |
431 | == 0 if error or no memory */ | |
432 | regs.x.ax = 0x1709; | |
433 | regs.x.si = Size >> 16; | |
434 | regs.x.cx = Size & 0xffff; | |
435 | __dpmi_int(0x2f, ®s); | |
436 | return ((unsigned)regs.x.dx << 16) | regs.x.ax; | |
437 | } | |
438 | \f | |
439 | static char no_mem_msg[] = | |
440 | "(Not enough DOS memory to put saved text into clipboard.)"; | |
0265f89f EZ |
441 | static char binary_msg[] = |
442 | "(Binary characters in saved text; clipboard data not set.)"; | |
aae41d97 EZ |
443 | static char system_error_msg[] = |
444 | "(Clipboard interface failure; clipboard data not set.)"; | |
21cfcccf | 445 | |
767079a8 | 446 | DEFUN ("w16-set-clipboard-data", Fw16_set_clipboard_data, Sw16_set_clipboard_data, 1, 2, 0, |
70da46c3 | 447 | doc: /* This sets the clipboard data to the given text. */) |
5842a27b | 448 | (Lisp_Object string, Lisp_Object frame) |
21cfcccf | 449 | { |
0265f89f | 450 | unsigned ok = 1, put_status = 0; |
891ef8f7 | 451 | int nbytes, no_crlf_conversion; |
583f5d53 | 452 | unsigned char *src, *dst = NULL; |
21cfcccf | 453 | |
b7826503 | 454 | CHECK_STRING (string); |
3276b4fe | 455 | |
21cfcccf EZ |
456 | if (NILP (frame)) |
457 | frame = Fselected_frame (); | |
458 | ||
b7826503 | 459 | CHECK_LIVE_FRAME (frame); |
21cfcccf EZ |
460 | if ( !FRAME_MSDOS_P (XFRAME (frame))) |
461 | goto done; | |
3276b4fe | 462 | |
21cfcccf EZ |
463 | BLOCK_INPUT; |
464 | ||
1b912a3b EZ |
465 | if (!open_clipboard ()) |
466 | goto error; | |
467 | ||
d5db4077 KR |
468 | nbytes = SBYTES (string); |
469 | src = SDATA (string); | |
583f5d53 | 470 | |
9b317797 EZ |
471 | /* Do we need to encode this text? */ |
472 | for (dst = src; dst < src + nbytes; dst++) | |
473 | { | |
474 | if (*dst == '\0' || *dst >= 0x80) | |
475 | break; | |
476 | } | |
477 | if (dst >= src + nbytes) | |
583f5d53 | 478 | { |
9b317797 | 479 | /* No multibyte characters in text. We need not encode it, but we |
583f5d53 EZ |
480 | will have to convert it to DOS CR-LF style. */ |
481 | no_crlf_conversion = 0; | |
9b317797 | 482 | Vlast_coding_system_used = Qraw_text; |
1b912a3b | 483 | dst = NULL; /* so we don't try to free a random pointer */ |
583f5d53 EZ |
484 | } |
485 | else | |
486 | { | |
487 | /* We must encode contents of STRING according to what | |
488 | clipboard-coding-system specifies. */ | |
583f5d53 | 489 | struct coding_system coding; |
9b317797 EZ |
490 | Lisp_Object coding_system = |
491 | NILP (Vnext_selection_coding_system) ? | |
492 | Vselection_coding_system : Vnext_selection_coding_system; | |
583f5d53 | 493 | |
9b317797 EZ |
494 | setup_coding_system (Fcheck_coding_system (coding_system), &coding); |
495 | coding.dst_bytes = nbytes * 4; | |
496 | coding.destination = (unsigned char *) xmalloc (coding.dst_bytes); | |
9963e859 | 497 | Vnext_selection_coding_system = Qnil; |
583f5d53 | 498 | coding.mode |= CODING_MODE_LAST_BLOCK; |
9b317797 EZ |
499 | dst = coding.destination; |
500 | encode_coding_object (&coding, string, 0, 0, | |
501 | SCHARS (string), nbytes, Qnil); | |
583f5d53 | 502 | no_crlf_conversion = 1; |
c7594627 | 503 | nbytes = coding.produced; |
9b317797 | 504 | Vlast_coding_system_used = CODING_ID_NAME (coding.id); |
ba92a470 | 505 | src = dst; |
583f5d53 EZ |
506 | } |
507 | ||
583f5d53 | 508 | ok = empty_clipboard () |
0265f89f | 509 | && ((put_status |
ba92a470 | 510 | = set_clipboard_data (CF_OEMTEXT, src, nbytes, no_crlf_conversion)) |
0265f89f | 511 | == 0); |
583f5d53 EZ |
512 | |
513 | if (!no_crlf_conversion) | |
21cfcccf | 514 | close_clipboard (); |
3276b4fe | 515 | |
31354c30 | 516 | if (ok) goto unblock; |
21cfcccf EZ |
517 | |
518 | error: | |
3276b4fe | 519 | |
21cfcccf EZ |
520 | ok = 0; |
521 | ||
31354c30 | 522 | unblock: |
70fdbb46 | 523 | xfree (dst); |
31354c30 EZ |
524 | UNBLOCK_INPUT; |
525 | ||
21cfcccf EZ |
526 | /* Notify user if the text is too large to fit into DOS memory. |
527 | (This will happen somewhere after 600K bytes (470K in DJGPP v1.x), | |
528 | depending on user system configuration.) If we just silently | |
529 | fail the function, people might wonder why their text sometimes | |
530 | doesn't make it to the clipboard. */ | |
0265f89f | 531 | if (put_status) |
21cfcccf | 532 | { |
0265f89f EZ |
533 | switch (put_status) |
534 | { | |
535 | case 1: | |
536 | message2 (no_mem_msg, sizeof (no_mem_msg) - 1, 0); | |
537 | break; | |
538 | case 2: | |
539 | message2 (binary_msg, sizeof (binary_msg) - 1, 0); | |
540 | break; | |
aae41d97 EZ |
541 | case 3: |
542 | message2 (system_error_msg, sizeof (system_error_msg) - 1, 0); | |
543 | break; | |
0265f89f | 544 | } |
b33e80aa | 545 | sit_for (make_number (2), 0, 2); |
21cfcccf | 546 | } |
3276b4fe | 547 | |
21cfcccf | 548 | done: |
21cfcccf | 549 | |
0265f89f | 550 | return (ok && put_status == 0 ? string : Qnil); |
21cfcccf EZ |
551 | } |
552 | ||
767079a8 | 553 | DEFUN ("w16-get-clipboard-data", Fw16_get_clipboard_data, Sw16_get_clipboard_data, 0, 1, 0, |
70da46c3 | 554 | doc: /* This gets the clipboard data in text format. */) |
5842a27b | 555 | (Lisp_Object frame) |
21cfcccf EZ |
556 | { |
557 | unsigned data_size, truelen; | |
1b912a3b | 558 | unsigned char *htext = NULL; |
21cfcccf | 559 | Lisp_Object ret = Qnil; |
891ef8f7 | 560 | int require_decoding = 0; |
583f5d53 | 561 | |
21cfcccf EZ |
562 | if (NILP (frame)) |
563 | frame = Fselected_frame (); | |
564 | ||
b7826503 | 565 | CHECK_LIVE_FRAME (frame); |
21cfcccf EZ |
566 | if ( !FRAME_MSDOS_P (XFRAME (frame))) |
567 | goto done; | |
3276b4fe | 568 | |
21cfcccf | 569 | BLOCK_INPUT; |
3276b4fe | 570 | |
21cfcccf | 571 | if (!open_clipboard ()) |
31354c30 | 572 | goto unblock; |
21cfcccf | 573 | |
538d05bb | 574 | if ((data_size = get_clipboard_data_size (CF_OEMTEXT)) == 0 || |
21cfcccf EZ |
575 | (htext = (unsigned char *)xmalloc (data_size)) == 0) |
576 | goto closeclip; | |
577 | ||
578 | /* need to know final size after '\r' chars are removed because | |
579 | we can't change the string size manually, and doing an extra | |
580 | copy is silly */ | |
538d05bb | 581 | if ((truelen = get_clipboard_data (CF_OEMTEXT, htext, data_size, 0)) == 0) |
21cfcccf EZ |
582 | goto closeclip; |
583 | ||
583f5d53 | 584 | /* Do we need to decode it? */ |
3276b4fe EZ |
585 | { |
586 | /* If the clipboard data contains any 8-bit Latin-1 code, we | |
587 | need to decode it. */ | |
588 | int i; | |
589 | ||
590 | for (i = 0; i < truelen; i++) | |
591 | { | |
592 | if (htext[i] >= 0x80) | |
593 | { | |
9b317797 | 594 | require_decoding = 1; |
3276b4fe EZ |
595 | break; |
596 | } | |
597 | } | |
598 | } | |
9b317797 | 599 | if (require_decoding) |
583f5d53 | 600 | { |
583f5d53 | 601 | struct coding_system coding; |
9b317797 | 602 | Lisp_Object coding_system = Vnext_selection_coding_system; |
583f5d53 | 603 | |
9b317797 EZ |
604 | truelen = get_clipboard_data (CF_OEMTEXT, htext, data_size, 1); |
605 | if (NILP (coding_system)) | |
606 | coding_system = Vselection_coding_system; | |
607 | setup_coding_system (Fcheck_coding_system (coding_system), &coding); | |
608 | coding.source = htext; | |
583f5d53 | 609 | coding.mode |= CODING_MODE_LAST_BLOCK; |
9b317797 | 610 | /* We explicitly disable composition handling because selection |
ee826e00 | 611 | data should not contain any composition sequence. */ |
9b317797 EZ |
612 | coding.mode &= CODING_ANNOTATION_MASK; |
613 | decode_coding_object (&coding, Qnil, 0, 0, truelen, truelen, Qt); | |
614 | ret = coding.dst_object; | |
615 | Vlast_coding_system_used = CODING_ID_NAME (coding.id); | |
583f5d53 EZ |
616 | } |
617 | else | |
618 | { | |
619 | ret = make_unibyte_string ((char *) htext, truelen); | |
620 | Vlast_coding_system_used = Qraw_text; | |
621 | } | |
622 | ||
21cfcccf | 623 | xfree (htext); |
9b317797 | 624 | Vnext_selection_coding_system = Qnil; |
21cfcccf EZ |
625 | |
626 | closeclip: | |
627 | close_clipboard (); | |
31354c30 EZ |
628 | |
629 | unblock: | |
630 | UNBLOCK_INPUT; | |
8de1855e | 631 | |
21cfcccf | 632 | done: |
8de1855e | 633 | |
21cfcccf EZ |
634 | return (ret); |
635 | } | |
636 | ||
637 | /* Support checking for a clipboard selection. */ | |
638 | ||
639 | DEFUN ("x-selection-exists-p", Fx_selection_exists_p, Sx_selection_exists_p, | |
70da46c3 PJ |
640 | 0, 1, 0, |
641 | doc: /* Whether there is an owner for the given X Selection. | |
642 | The arg should be the name of the selection in question, typically one of | |
643 | the symbols `PRIMARY', `SECONDARY', or `CLIPBOARD'. | |
644 | \(Those are literal upper-case symbol names, since that's what X expects.) | |
645 | For convenience, the symbol nil is the same as `PRIMARY', | |
646 | and t is the same as `SECONDARY'. */) | |
5842a27b | 647 | (Lisp_Object selection) |
21cfcccf | 648 | { |
b7826503 | 649 | CHECK_SYMBOL (selection); |
21cfcccf EZ |
650 | |
651 | /* Return nil for SECONDARY selection. For PRIMARY (or nil) | |
652 | selection, check if there is some text on the kill-ring; | |
653 | for CLIPBOARD, check if the clipboard currently has valid | |
654 | text format contents. | |
655 | ||
656 | The test for killed text on the kill-ring emulates the Emacs | |
657 | behavior on X, where killed text is also put into X selection | |
658 | by the X interface code. (On MSDOS, killed text is only put | |
659 | into the clipboard if we run under Windows, so we cannot check | |
660 | the clipboard alone.) */ | |
661 | if ((EQ (selection, Qnil) || EQ (selection, QPRIMARY)) | |
d16bdfc3 EZ |
662 | && ! NILP (Fsymbol_value (Fintern_soft (build_string ("kill-ring"), |
663 | Qnil)))) | |
21cfcccf EZ |
664 | return Qt; |
665 | ||
666 | if (EQ (selection, QCLIPBOARD)) | |
667 | { | |
668 | Lisp_Object val = Qnil; | |
669 | ||
670 | if (open_clipboard ()) | |
671 | { | |
538d05bb | 672 | if (get_clipboard_data_size (CF_OEMTEXT)) |
21cfcccf EZ |
673 | val = Qt; |
674 | close_clipboard (); | |
675 | } | |
676 | return val; | |
677 | } | |
678 | return Qnil; | |
679 | } | |
680 | ||
8de1855e | 681 | void |
3a8ce822 | 682 | syms_of_win16select (void) |
21cfcccf | 683 | { |
767079a8 EZ |
684 | defsubr (&Sw16_set_clipboard_data); |
685 | defsubr (&Sw16_get_clipboard_data); | |
21cfcccf EZ |
686 | defsubr (&Sx_selection_exists_p); |
687 | ||
29208e82 | 688 | DEFVAR_LISP ("selection-coding-system", Vselection_coding_system, |
f5f25615 GM |
689 | doc: /* Coding system for communicating with other programs. |
690 | ||
691 | For MS-Windows and MS-DOS: | |
692 | When sending or receiving text via selection and clipboard, the text | |
693 | is encoded or decoded by this coding system. The default value is | |
694 | the current system default encoding on 9x/Me, `utf-16le-dos' | |
695 | \(Unicode) on NT/W2K/XP, and `iso-latin-1-dos' on MS-DOS. | |
696 | ||
697 | For X Windows: | |
698 | When sending text via selection and clipboard, if the target | |
699 | data-type matches with the type of this coding system, it is used | |
700 | for encoding the text. Otherwise (including the case that this | |
701 | variable is nil), a proper coding system is used as below: | |
702 | ||
703 | data-type coding system | |
704 | --------- ------------- | |
705 | UTF8_STRING utf-8 | |
706 | COMPOUND_TEXT compound-text-with-extensions | |
707 | STRING iso-latin-1 | |
708 | C_STRING no-conversion | |
709 | ||
710 | When receiving text, if this coding system is non-nil, it is used | |
711 | for decoding regardless of the data-type. If this is nil, a | |
712 | proper coding system is used according to the data-type as above. | |
713 | ||
714 | See also the documentation of the variable `x-select-request-type' how | |
715 | to control which data-type to request for receiving text. | |
716 | ||
717 | The default value is nil. */); | |
b45b1e81 | 718 | Vselection_coding_system = intern ("iso-latin-1-dos"); |
9963e859 | 719 | |
29208e82 | 720 | DEFVAR_LISP ("next-selection-coding-system", Vnext_selection_coding_system, |
3646b86d | 721 | doc: /* Coding system for the next communication with other programs. |
70da46c3 | 722 | Usually, `selection-coding-system' is used for communicating with |
3646b86d GM |
723 | other programs (X Windows clients or MS Windows programs). But, if this |
724 | variable is set, it is used for the next communication only. | |
725 | After the communication, this variable is set to nil. */); | |
9963e859 | 726 | Vnext_selection_coding_system = Qnil; |
583f5d53 | 727 | |
21cfcccf EZ |
728 | QPRIMARY = intern ("PRIMARY"); staticpro (&QPRIMARY); |
729 | QCLIPBOARD = intern ("CLIPBOARD"); staticpro (&QCLIPBOARD); | |
730 | } | |
731 | ||
732 | #endif /* MSDOS */ | |
6b61353c | 733 |