Mercurial > vim
annotate src/if_xcmdsrv.c @ 7601:88c4c634e919
Added tag v7.4.1099 for changeset fa59fafb6a9464b579504aa6c5abe6d5d0382f0d
| author | Christian Brabandt <cb@256bit.org> |
|---|---|
| date | Fri, 15 Jan 2016 22:15:05 +0100 |
| parents | ad57f5b5bd6c |
| children | 37c929c4a073 |
| rev | line source |
|---|---|
| 7 | 1 /* vi:set ts=8 sts=4 sw=4: |
| 2 * | |
| 3 * VIM - Vi IMproved by Bram Moolenaar | |
| 4 * X command server by Flemming Madsen | |
| 5 * | |
| 6 * Do ":help uganda" in Vim to read copying and usage conditions. | |
| 7 * Do ":help credits" in Vim to see a list of people who contributed. | |
| 8 * See README.txt for an overview of the Vim source code. | |
| 9 * | |
| 10 * if_xcmdsrv.c: Functions for passing commands through an X11 display. | |
| 11 * | |
| 12 */ | |
| 13 | |
| 14 #include "vim.h" | |
| 15 #include "version.h" | |
| 16 | |
| 17 #if defined(FEAT_CLIENTSERVER) || defined(PROTO) | |
| 18 | |
| 19 # ifdef FEAT_X11 | |
| 20 # include <X11/Intrinsic.h> | |
| 21 # include <X11/Xatom.h> | |
| 22 # endif | |
| 23 | |
| 24 /* | |
| 1121 | 25 * This file provides procedures that implement the command server |
| 26 * functionality of Vim when in contact with an X11 server. | |
| 7 | 27 * |
| 28 * Adapted from TCL/TK's send command in tkSend.c of the tk 3.6 distribution. | |
| 29 * Adapted for use in Vim by Flemming Madsen. Protocol changed to that of tk 4 | |
| 30 */ | |
| 31 | |
| 32 /* | |
| 33 * Copyright (c) 1989-1993 The Regents of the University of California. | |
| 34 * All rights reserved. | |
| 35 * | |
| 36 * Permission is hereby granted, without written agreement and without | |
| 37 * license or royalty fees, to use, copy, modify, and distribute this | |
| 38 * software and its documentation for any purpose, provided that the | |
| 39 * above copyright notice and the following two paragraphs appear in | |
| 40 * all copies of this software. | |
| 41 * | |
| 42 * IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR | |
| 43 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT | |
| 44 * OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF | |
| 45 * CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 46 * | |
| 47 * THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES, | |
| 48 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY | |
| 49 * AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS | |
| 50 * ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATION TO | |
| 51 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. | |
| 52 */ | |
| 53 | |
| 54 | |
| 55 /* | |
| 56 * When a result is being awaited from a sent command, one of | |
| 57 * the following structures is present on a list of all outstanding | |
| 58 * sent commands. The information in the structure is used to | |
| 59 * process the result when it arrives. You're probably wondering | |
| 60 * how there could ever be multiple outstanding sent commands. | |
| 61 * This could happen if Vim instances invoke each other recursively. | |
| 62 * It's unlikely, but possible. | |
| 63 */ | |
| 64 | |
| 65 typedef struct PendingCommand | |
| 66 { | |
| 67 int serial; /* Serial number expected in result. */ | |
| 68 int code; /* Result Code. 0 is OK */ | |
| 69 char_u *result; /* String result for command (malloc'ed). | |
| 70 * NULL means command still pending. */ | |
| 71 struct PendingCommand *nextPtr; | |
| 72 /* Next in list of all outstanding commands. | |
| 73 * NULL means end of list. */ | |
| 74 } PendingCommand; | |
| 75 | |
| 76 static PendingCommand *pendingCommands = NULL; | |
| 77 /* List of all commands currently | |
| 78 * being waited for. */ | |
| 79 | |
| 80 /* | |
| 81 * The information below is used for communication between processes | |
| 82 * during "send" commands. Each process keeps a private window, never | |
| 83 * even mapped, with one property, "Comm". When a command is sent to | |
| 84 * an interpreter, the command is appended to the comm property of the | |
| 85 * communication window associated with the interp's process. Similarly, | |
| 86 * when a result is returned from a sent command, it is also appended | |
| 87 * to the comm property. | |
| 88 * | |
| 89 * Each command and each result takes the form of ASCII text. For a | |
| 90 * command, the text consists of a nul character followed by several | |
| 39 | 91 * nul-terminated ASCII strings. The first string consists of a |
| 92 * single letter: | |
| 93 * "c" for an expression | |
| 94 * "k" for keystrokes | |
| 95 * "r" for reply | |
| 96 * "n" for notification. | |
| 97 * Subsequent strings have the form "option value" where the following options | |
| 98 * are supported: | |
| 7 | 99 * |
| 100 * -r commWindow serial | |
| 101 * | |
| 102 * This option means that a response should be sent to the window | |
| 103 * whose X identifier is "commWindow" (in hex), and the response should | |
| 104 * be identified with the serial number given by "serial" (in decimal). | |
| 105 * If this option isn't specified then the send is asynchronous and | |
| 106 * no response is sent. | |
| 107 * | |
| 108 * -n name | |
| 109 * "Name" gives the name of the application for which the command is | |
| 110 * intended. This option must be present. | |
| 111 * | |
| 39 | 112 * -E encoding |
| 113 * Encoding name used for the text. This is the 'encoding' of the | |
| 114 * sender. The receiver may want to do conversion to his 'encoding'. | |
| 115 * | |
| 7 | 116 * -s script |
| 117 * "Script" is the script to be executed. This option must be | |
| 118 * present. Taken as a series of keystrokes in a "k" command where | |
| 119 * <Key>'s are expanded | |
| 120 * | |
| 121 * The options may appear in any order. The -n and -s options must be | |
| 122 * present, but -r may be omitted for asynchronous RPCs. For compatibility | |
| 123 * with future releases that may add new features, there may be additional | |
| 124 * options present; as long as they start with a "-" character, they will | |
| 125 * be ignored. | |
| 126 * | |
| 127 * A result also consists of a zero character followed by several null- | |
| 128 * terminated ASCII strings. The first string consists of the single | |
| 129 * letter "r". Subsequent strings have the form "option value" where | |
| 130 * the following options are supported: | |
| 131 * | |
| 132 * -s serial | |
| 133 * Identifies the command for which this is the result. It is the | |
| 134 * same as the "serial" field from the -s option in the command. This | |
| 135 * option must be present. | |
| 136 * | |
| 137 * -r result | |
| 138 * "Result" is the result string for the script, which may be either | |
| 139 * a result or an error message. If this field is omitted then it | |
| 140 * defaults to an empty string. | |
| 141 * | |
| 142 * -c code | |
| 143 * 0: for OK. This is the default. | |
| 144 * 1: for error: Result is the last error | |
| 145 * | |
| 146 * -i errorInfo | |
| 147 * -e errorCode | |
| 148 * Not applicable for Vim | |
| 149 * | |
| 150 * Options may appear in any order, and only the -s option must be | |
| 151 * present. As with commands, there may be additional options besides | |
| 152 * these; unknown options are ignored. | |
| 153 */ | |
| 154 | |
| 155 /* | |
| 156 * Maximum size property that can be read at one time by | |
| 157 * this module: | |
| 158 */ | |
| 159 | |
| 160 #define MAX_PROP_WORDS 100000 | |
| 161 | |
| 162 struct ServerReply | |
| 163 { | |
| 164 Window id; | |
| 165 garray_T strings; | |
| 166 }; | |
| 167 static garray_T serverReply = { 0, 0, 0, 0, 0 }; | |
| 168 enum ServerReplyOp { SROP_Find, SROP_Add, SROP_Delete }; | |
| 169 | |
| 170 typedef int (*EndCond) __ARGS((void *)); | |
| 171 | |
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172 struct x_cmdqueue |
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173 { |
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174 char_u *propInfo; |
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175 long_u len; |
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176 struct x_cmdqueue *next; |
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177 struct x_cmdqueue *prev; |
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178 }; |
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179 |
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180 typedef struct x_cmdqueue x_queue_T; |
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commit https://github.com/vim/vim/commit/93c88e0f6a4a8f7634ed84721daf4af46fc0d5db
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181 |
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commit https://github.com/vim/vim/commit/93c88e0f6a4a8f7634ed84721daf4af46fc0d5db
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182 /* dummy node, header for circular queue */ |
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183 static x_queue_T head = {NULL, 0, NULL, NULL}; |
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commit https://github.com/vim/vim/commit/93c88e0f6a4a8f7634ed84721daf4af46fc0d5db
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184 |
| 7 | 185 /* |
| 186 * Forward declarations for procedures defined later in this file: | |
| 187 */ | |
| 188 | |
| 189 static Window LookupName __ARGS((Display *dpy, char_u *name, int delete, char_u **loose)); | |
| 190 static int SendInit __ARGS((Display *dpy)); | |
| 191 static int DoRegisterName __ARGS((Display *dpy, char_u *name)); | |
| 192 static void DeleteAnyLingerer __ARGS((Display *dpy, Window w)); | |
| 193 static int GetRegProp __ARGS((Display *dpy, char_u **regPropp, long_u *numItemsp, int domsg)); | |
| 194 static int WaitForPend __ARGS((void *p)); | |
| 195 static int WaitForReply __ARGS((void *p)); | |
| 196 static int WindowValid __ARGS((Display *dpy, Window w)); | |
| 197 static void ServerWait __ARGS((Display *dpy, Window w, EndCond endCond, void *endData, int localLoop, int seconds)); | |
| 198 static struct ServerReply *ServerReplyFind __ARGS((Window w, enum ServerReplyOp op)); | |
| 199 static int AppendPropCarefully __ARGS((Display *display, Window window, Atom property, char_u *value, int length)); | |
| 200 static int x_error_check __ARGS((Display *dpy, XErrorEvent *error_event)); | |
| 201 static int IsSerialName __ARGS((char_u *name)); | |
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202 static void save_in_queue __ARGS((char_u *buf, long_u len)); |
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203 static void server_parse_message __ARGS((Display *dpy, char_u *propInfo, long_u numItems)); |
| 7 | 204 |
| 205 /* Private variables for the "server" functionality */ | |
| 206 static Atom registryProperty = None; | |
| 207 static Atom vimProperty = None; | |
| 208 static int got_x_error = FALSE; | |
| 209 | |
| 210 static char_u *empty_prop = (char_u *)""; /* empty GetRegProp() result */ | |
| 211 | |
| 212 /* | |
| 213 * Associate an ASCII name with Vim. Try real hard to get a unique one. | |
| 214 * Returns FAIL or OK. | |
| 215 */ | |
| 216 int | |
| 217 serverRegisterName(dpy, name) | |
| 218 Display *dpy; /* display to register with */ | |
| 219 char_u *name; /* the name that will be used as a base */ | |
| 220 { | |
| 221 int i; | |
| 222 int res; | |
| 223 char_u *p = NULL; | |
| 224 | |
| 225 res = DoRegisterName(dpy, name); | |
| 226 if (res < 0) | |
| 227 { | |
| 228 i = 1; | |
| 229 do | |
| 230 { | |
| 231 if (res < -1 || i >= 1000) | |
| 232 { | |
| 233 MSG_ATTR(_("Unable to register a command server name"), | |
| 234 hl_attr(HLF_W)); | |
| 235 return FAIL; | |
| 236 } | |
| 237 if (p == NULL) | |
| 238 p = alloc(STRLEN(name) + 10); | |
| 239 if (p == NULL) | |
| 240 { | |
| 241 res = -10; | |
| 242 continue; | |
| 243 } | |
| 244 sprintf((char *)p, "%s%d", name, i++); | |
| 245 res = DoRegisterName(dpy, p); | |
| 246 } | |
| 247 while (res < 0) | |
| 248 ; | |
| 249 vim_free(p); | |
| 250 } | |
| 251 return OK; | |
| 252 } | |
| 253 | |
| 254 static int | |
| 255 DoRegisterName(dpy, name) | |
| 256 Display *dpy; | |
| 257 char_u *name; | |
| 258 { | |
| 259 Window w; | |
| 260 XErrorHandler old_handler; | |
| 261 #define MAX_NAME_LENGTH 100 | |
| 262 char_u propInfo[MAX_NAME_LENGTH + 20]; | |
| 263 | |
| 264 if (commProperty == None) | |
| 265 { | |
| 266 if (SendInit(dpy) < 0) | |
| 267 return -2; | |
| 268 } | |
| 269 | |
| 270 /* | |
| 271 * Make sure the name is unique, and append info about it to | |
| 272 * the registry property. It's important to lock the server | |
| 273 * here to prevent conflicting changes to the registry property. | |
| 274 * WARNING: Do not step through this while debugging, it will hangup the X | |
| 275 * server! | |
| 276 */ | |
| 277 XGrabServer(dpy); | |
| 278 w = LookupName(dpy, name, FALSE, NULL); | |
| 279 if (w != (Window)0) | |
| 280 { | |
| 281 Status status; | |
| 282 int dummyInt; | |
| 283 unsigned int dummyUns; | |
| 284 Window dummyWin; | |
| 285 | |
| 286 /* | |
| 287 * The name is currently registered. See if the commWindow | |
| 288 * associated with the name exists. If not, or if the commWindow | |
| 289 * is *our* commWindow, then just unregister the old name (this | |
| 290 * could happen if an application dies without cleaning up the | |
| 291 * registry). | |
| 292 */ | |
| 293 old_handler = XSetErrorHandler(x_error_check); | |
| 294 status = XGetGeometry(dpy, w, &dummyWin, &dummyInt, &dummyInt, | |
| 295 &dummyUns, &dummyUns, &dummyUns, &dummyUns); | |
| 296 (void)XSetErrorHandler(old_handler); | |
| 297 if (status != Success && w != commWindow) | |
| 298 { | |
| 299 XUngrabServer(dpy); | |
| 300 XFlush(dpy); | |
| 301 return -1; | |
| 302 } | |
| 303 (void)LookupName(dpy, name, /*delete=*/TRUE, NULL); | |
| 304 } | |
| 305 sprintf((char *)propInfo, "%x %.*s", (int_u)commWindow, | |
| 306 MAX_NAME_LENGTH, name); | |
| 307 old_handler = XSetErrorHandler(x_error_check); | |
| 308 got_x_error = FALSE; | |
| 309 XChangeProperty(dpy, RootWindow(dpy, 0), registryProperty, XA_STRING, 8, | |
| 310 PropModeAppend, propInfo, STRLEN(propInfo) + 1); | |
| 311 XUngrabServer(dpy); | |
| 312 XSync(dpy, False); | |
| 313 (void)XSetErrorHandler(old_handler); | |
| 314 | |
| 315 if (!got_x_error) | |
| 316 { | |
| 317 #ifdef FEAT_EVAL | |
| 318 set_vim_var_string(VV_SEND_SERVER, name, -1); | |
| 319 #endif | |
| 320 serverName = vim_strsave(name); | |
| 321 #ifdef FEAT_TITLE | |
| 322 need_maketitle = TRUE; | |
| 323 #endif | |
| 324 return 0; | |
| 325 } | |
| 326 return -2; | |
| 327 } | |
| 328 | |
| 329 #if defined(FEAT_GUI) || defined(PROTO) | |
| 330 /* | |
| 331 * Clean out new ID from registry and set it as comm win. | |
| 332 * Change any registered window ID. | |
| 333 */ | |
| 334 void | |
| 335 serverChangeRegisteredWindow(dpy, newwin) | |
| 336 Display *dpy; /* Display to register with */ | |
| 337 Window newwin; /* Re-register to this ID */ | |
| 338 { | |
| 339 char_u propInfo[MAX_NAME_LENGTH + 20]; | |
| 340 | |
| 341 commWindow = newwin; | |
| 342 | |
| 343 /* Always call SendInit() here, to make sure commWindow is marked as a Vim | |
| 344 * window. */ | |
| 345 if (SendInit(dpy) < 0) | |
| 346 return; | |
| 347 | |
| 348 /* WARNING: Do not step through this while debugging, it will hangup the X | |
| 349 * server! */ | |
| 350 XGrabServer(dpy); | |
| 351 DeleteAnyLingerer(dpy, newwin); | |
| 352 if (serverName != NULL) | |
| 353 { | |
| 354 /* Reinsert name if we was already registered */ | |
| 355 (void)LookupName(dpy, serverName, /*delete=*/TRUE, NULL); | |
| 356 sprintf((char *)propInfo, "%x %.*s", | |
| 357 (int_u)newwin, MAX_NAME_LENGTH, serverName); | |
| 358 XChangeProperty(dpy, RootWindow(dpy, 0), registryProperty, XA_STRING, 8, | |
| 359 PropModeAppend, (char_u *)propInfo, | |
| 360 STRLEN(propInfo) + 1); | |
| 361 } | |
| 362 XUngrabServer(dpy); | |
| 363 } | |
| 364 #endif | |
| 365 | |
| 366 /* | |
| 367 * Send to an instance of Vim via the X display. | |
| 368 * Returns 0 for OK, negative for an error. | |
| 369 */ | |
| 370 int | |
| 371 serverSendToVim(dpy, name, cmd, result, server, asExpr, localLoop, silent) | |
| 372 Display *dpy; /* Where to send. */ | |
| 373 char_u *name; /* Where to send. */ | |
| 374 char_u *cmd; /* What to send. */ | |
| 375 char_u **result; /* Result of eval'ed expression */ | |
| 376 Window *server; /* Actual ID of receiving app */ | |
| 377 Bool asExpr; /* Interpret as keystrokes or expr ? */ | |
| 378 Bool localLoop; /* Throw away everything but result */ | |
| 379 int silent; /* don't complain about no server */ | |
| 380 { | |
| 381 Window w; | |
| 382 char_u *property; | |
| 383 int length; | |
| 384 int res; | |
| 385 static int serial = 0; /* Running count of sent commands. | |
| 386 * Used to give each command a | |
| 387 * different serial number. */ | |
| 388 PendingCommand pending; | |
| 389 char_u *loosename = NULL; | |
| 390 | |
| 391 if (result != NULL) | |
| 392 *result = NULL; | |
| 393 if (name == NULL || *name == NUL) | |
| 394 name = (char_u *)"GVIM"; /* use a default name */ | |
| 395 | |
| 396 if (commProperty == None && dpy != NULL) | |
| 397 { | |
| 398 if (SendInit(dpy) < 0) | |
| 399 return -1; | |
| 400 } | |
| 401 | |
| 402 /* Execute locally if no display or target is ourselves */ | |
| 403 if (dpy == NULL || (serverName != NULL && STRICMP(name, serverName) == 0)) | |
| 404 { | |
| 405 if (asExpr) | |
| 406 { | |
| 407 char_u *ret; | |
| 408 | |
| 409 ret = eval_client_expr_to_string(cmd); | |
| 410 if (result != NULL) | |
| 411 { | |
| 412 if (ret == NULL) | |
| 413 *result = vim_strsave((char_u *)_(e_invexprmsg)); | |
| 414 else | |
| 415 *result = ret; | |
| 416 } | |
| 417 else | |
| 418 vim_free(ret); | |
| 419 return ret == NULL ? -1 : 0; | |
| 420 } | |
| 421 else | |
| 422 server_to_input_buf(cmd); | |
| 423 return 0; | |
| 424 } | |
| 425 | |
| 426 /* | |
| 427 * Bind the server name to a communication window. | |
| 428 * | |
| 429 * Find any survivor with a serialno attached to the name if the | |
| 430 * original registrant of the wanted name is no longer present. | |
| 431 * | |
| 432 * Delete any lingering names from dead editors. | |
| 433 */ | |
| 434 while (TRUE) | |
| 435 { | |
| 436 w = LookupName(dpy, name, FALSE, &loosename); | |
| 437 /* Check that the window is hot */ | |
| 438 if (w != None) | |
| 439 { | |
| 440 if (!WindowValid(dpy, w)) | |
| 441 { | |
| 442 LookupName(dpy, loosename ? loosename : name, | |
| 443 /*DELETE=*/TRUE, NULL); | |
| 444 continue; | |
| 445 } | |
| 446 } | |
| 447 break; | |
| 448 } | |
| 449 if (w == None) | |
| 450 { | |
| 451 if (!silent) | |
| 452 EMSG2(_(e_noserver), name); | |
| 453 return -1; | |
| 454 } | |
| 455 else if (loosename != NULL) | |
| 456 name = loosename; | |
| 457 if (server != NULL) | |
| 458 *server = w; | |
| 459 | |
| 460 /* | |
| 461 * Send the command to target interpreter by appending it to the | |
| 462 * comm window in the communication window. | |
| 500 | 463 * Length must be computed exactly! |
| 7 | 464 */ |
| 39 | 465 #ifdef FEAT_MBYTE |
| 500 | 466 length = STRLEN(name) + STRLEN(p_enc) + STRLEN(cmd) + 14; |
| 467 #else | |
| 468 length = STRLEN(name) + STRLEN(cmd) + 10; | |
| 39 | 469 #endif |
| 470 property = (char_u *)alloc((unsigned)length + 30); | |
| 7 | 471 |
| 39 | 472 #ifdef FEAT_MBYTE |
| 473 sprintf((char *)property, "%c%c%c-n %s%c-E %s%c-s %s", | |
| 474 0, asExpr ? 'c' : 'k', 0, name, 0, p_enc, 0, cmd); | |
| 475 #else | |
| 7 | 476 sprintf((char *)property, "%c%c%c-n %s%c-s %s", |
| 477 0, asExpr ? 'c' : 'k', 0, name, 0, cmd); | |
| 39 | 478 #endif |
| 7 | 479 if (name == loosename) |
| 480 vim_free(loosename); | |
| 481 /* Add a back reference to our comm window */ | |
| 482 serial++; | |
| 483 sprintf((char *)property + length, "%c-r %x %d", | |
| 484 0, (int_u)commWindow, serial); | |
| 500 | 485 /* Add length of what "-r %x %d" resulted in, skipping the NUL. */ |
| 7 | 486 length += STRLEN(property + length + 1) + 1; |
| 487 | |
| 488 res = AppendPropCarefully(dpy, w, commProperty, property, length + 1); | |
| 489 vim_free(property); | |
| 490 if (res < 0) | |
| 491 { | |
| 492 EMSG(_("E248: Failed to send command to the destination program")); | |
| 493 return -1; | |
| 494 } | |
| 495 | |
| 496 if (!asExpr) /* There is no answer for this - Keys are sent async */ | |
| 497 return 0; | |
| 498 | |
| 499 /* | |
| 500 * Register the fact that we're waiting for a command to | |
| 501 * complete (this is needed by SendEventProc and by | |
| 502 * AppendErrorProc to pass back the command's results). | |
| 503 */ | |
| 504 pending.serial = serial; | |
| 505 pending.code = 0; | |
| 506 pending.result = NULL; | |
| 507 pending.nextPtr = pendingCommands; | |
| 508 pendingCommands = &pending; | |
| 509 | |
| 510 ServerWait(dpy, w, WaitForPend, &pending, localLoop, 600); | |
| 511 | |
| 512 /* | |
| 513 * Unregister the information about the pending command | |
| 514 * and return the result. | |
| 515 */ | |
| 516 if (pendingCommands == &pending) | |
| 517 pendingCommands = pending.nextPtr; | |
| 518 else | |
| 519 { | |
| 520 PendingCommand *pcPtr; | |
| 521 | |
| 522 for (pcPtr = pendingCommands; pcPtr != NULL; pcPtr = pcPtr->nextPtr) | |
| 523 if (pcPtr->nextPtr == &pending) | |
| 524 { | |
| 525 pcPtr->nextPtr = pending.nextPtr; | |
| 526 break; | |
| 527 } | |
| 528 } | |
| 529 if (result != NULL) | |
| 530 *result = pending.result; | |
| 531 else | |
| 532 vim_free(pending.result); | |
| 533 | |
| 534 return pending.code == 0 ? 0 : -1; | |
| 535 } | |
| 536 | |
| 537 static int | |
| 538 WaitForPend(p) | |
| 539 void *p; | |
| 540 { | |
| 541 PendingCommand *pending = (PendingCommand *) p; | |
| 542 return pending->result != NULL; | |
| 543 } | |
| 544 | |
| 545 /* | |
| 546 * Return TRUE if window "w" exists and has a "Vim" property on it. | |
| 547 */ | |
| 548 static int | |
| 549 WindowValid(dpy, w) | |
| 550 Display *dpy; | |
| 551 Window w; | |
| 552 { | |
| 553 XErrorHandler old_handler; | |
| 554 Atom *plist; | |
| 555 int numProp; | |
| 556 int i; | |
| 557 | |
| 558 old_handler = XSetErrorHandler(x_error_check); | |
| 559 got_x_error = 0; | |
| 560 plist = XListProperties(dpy, w, &numProp); | |
| 561 XSync(dpy, False); | |
| 562 XSetErrorHandler(old_handler); | |
| 563 if (plist == NULL || got_x_error) | |
| 564 return FALSE; | |
| 565 | |
| 566 for (i = 0; i < numProp; i++) | |
| 567 if (plist[i] == vimProperty) | |
| 568 { | |
| 569 XFree(plist); | |
| 570 return TRUE; | |
| 571 } | |
| 572 XFree(plist); | |
| 573 return FALSE; | |
| 574 } | |
| 575 | |
| 576 /* | |
| 577 * Enter a loop processing X events & polling chars until we see a result | |
| 578 */ | |
| 579 static void | |
| 580 ServerWait(dpy, w, endCond, endData, localLoop, seconds) | |
| 581 Display *dpy; | |
| 582 Window w; | |
| 583 EndCond endCond; | |
| 584 void *endData; | |
| 585 int localLoop; | |
| 586 int seconds; | |
| 587 { | |
| 588 time_t start; | |
| 589 time_t now; | |
| 590 XEvent event; | |
| 3670 | 591 |
| 592 #define UI_MSEC_DELAY 50 | |
| 593 #define SEND_MSEC_POLL 500 | |
| 594 #ifndef HAVE_SELECT | |
| 595 struct pollfd fds; | |
| 596 | |
| 597 fds.fd = ConnectionNumber(dpy); | |
| 598 fds.events = POLLIN; | |
| 599 #else | |
| 600 fd_set fds; | |
| 601 struct timeval tv; | |
| 602 | |
| 603 tv.tv_sec = 0; | |
| 604 tv.tv_usec = SEND_MSEC_POLL * 1000; | |
| 605 FD_ZERO(&fds); | |
| 606 FD_SET(ConnectionNumber(dpy), &fds); | |
| 607 #endif | |
| 7 | 608 |
| 609 time(&start); | |
| 3670 | 610 while (TRUE) |
| 7 | 611 { |
| 3670 | 612 while (XCheckWindowEvent(dpy, commWindow, PropertyChangeMask, &event)) |
|
7109
fa95595fbc52
commit https://github.com/vim/vim/commit/93c88e0f6a4a8f7634ed84721daf4af46fc0d5db
Christian Brabandt <cb@256bit.org>
parents:
7009
diff
changeset
|
613 serverEventProc(dpy, &event, 1); |
| 3670 | 614 |
| 615 if (endCond(endData) != 0) | |
| 616 break; | |
| 617 if (!WindowValid(dpy, w)) | |
| 618 break; | |
| 7 | 619 time(&now); |
| 620 if (seconds >= 0 && (now - start) >= seconds) | |
| 621 break; | |
| 3670 | 622 |
| 623 /* Just look out for the answer without calling back into Vim */ | |
| 7 | 624 if (localLoop) |
| 625 { | |
| 626 #ifndef HAVE_SELECT | |
| 627 if (poll(&fds, 1, SEND_MSEC_POLL) < 0) | |
| 628 break; | |
| 629 #else | |
| 3670 | 630 if (select(FD_SETSIZE, &fds, NULL, NULL, &tv) < 0) |
| 7 | 631 break; |
| 632 #endif | |
| 633 } | |
| 634 else | |
| 635 { | |
| 636 if (got_int) | |
| 637 break; | |
| 3670 | 638 ui_delay((long)UI_MSEC_DELAY, TRUE); |
| 7 | 639 ui_breakcheck(); |
| 640 } | |
| 641 } | |
| 642 } | |
| 643 | |
| 644 | |
| 645 /* | |
| 646 * Fetch a list of all the Vim instance names currently registered for the | |
| 647 * display. | |
| 648 * | |
| 649 * Returns a newline separated list in allocated memory or NULL. | |
| 650 */ | |
| 651 char_u * | |
| 652 serverGetVimNames(dpy) | |
| 653 Display *dpy; | |
| 654 { | |
| 655 char_u *regProp; | |
| 656 char_u *entry; | |
| 657 char_u *p; | |
| 658 long_u numItems; | |
| 659 int_u w; | |
| 660 garray_T ga; | |
| 661 | |
| 662 if (registryProperty == None) | |
| 663 { | |
| 664 if (SendInit(dpy) < 0) | |
| 665 return NULL; | |
| 666 } | |
| 667 | |
| 668 /* | |
| 669 * Read the registry property. | |
| 670 */ | |
| 671 if (GetRegProp(dpy, ®Prop, &numItems, TRUE) == FAIL) | |
| 672 return NULL; | |
| 673 | |
| 674 /* | |
| 675 * Scan all of the names out of the property. | |
| 676 */ | |
| 677 ga_init2(&ga, 1, 100); | |
| 1880 | 678 for (p = regProp; (long_u)(p - regProp) < numItems; p++) |
| 7 | 679 { |
| 680 entry = p; | |
| 681 while (*p != 0 && !isspace(*p)) | |
| 682 p++; | |
| 683 if (*p != 0) | |
| 684 { | |
| 685 w = None; | |
| 686 sscanf((char *)entry, "%x", &w); | |
| 687 if (WindowValid(dpy, (Window)w)) | |
| 688 { | |
| 689 ga_concat(&ga, p + 1); | |
| 690 ga_concat(&ga, (char_u *)"\n"); | |
| 691 } | |
| 692 while (*p != 0) | |
| 693 p++; | |
| 694 } | |
| 695 } | |
| 696 if (regProp != empty_prop) | |
| 697 XFree(regProp); | |
| 21 | 698 ga_append(&ga, NUL); |
| 7 | 699 return ga.ga_data; |
| 700 } | |
| 701 | |
| 702 /* ---------------------------------------------------------- | |
| 703 * Reply stuff | |
| 704 */ | |
| 705 | |
| 706 static struct ServerReply * | |
| 707 ServerReplyFind(w, op) | |
| 708 Window w; | |
| 709 enum ServerReplyOp op; | |
| 710 { | |
| 711 struct ServerReply *p; | |
| 712 struct ServerReply e; | |
| 713 int i; | |
| 714 | |
| 715 p = (struct ServerReply *) serverReply.ga_data; | |
| 716 for (i = 0; i < serverReply.ga_len; i++, p++) | |
| 717 if (p->id == w) | |
| 718 break; | |
| 719 if (i >= serverReply.ga_len) | |
| 720 p = NULL; | |
| 721 | |
| 722 if (p == NULL && op == SROP_Add) | |
| 723 { | |
| 724 if (serverReply.ga_growsize == 0) | |
| 725 ga_init2(&serverReply, sizeof(struct ServerReply), 1); | |
| 726 if (ga_grow(&serverReply, 1) == OK) | |
| 727 { | |
| 728 p = ((struct ServerReply *) serverReply.ga_data) | |
| 729 + serverReply.ga_len; | |
| 730 e.id = w; | |
| 731 ga_init2(&e.strings, 1, 100); | |
| 1740 | 732 mch_memmove(p, &e, sizeof(e)); |
| 7 | 733 serverReply.ga_len++; |
| 734 } | |
| 735 } | |
| 736 else if (p != NULL && op == SROP_Delete) | |
| 737 { | |
| 738 ga_clear(&p->strings); | |
| 739 mch_memmove(p, p + 1, (serverReply.ga_len - i - 1) * sizeof(*p)); | |
| 740 serverReply.ga_len--; | |
| 741 } | |
| 742 | |
| 743 return p; | |
| 744 } | |
| 745 | |
| 746 /* | |
| 747 * Convert string to windowid. | |
| 748 * Issue an error if the id is invalid. | |
| 749 */ | |
| 750 Window | |
| 751 serverStrToWin(str) | |
| 752 char_u *str; | |
| 753 { | |
| 754 unsigned id = None; | |
| 755 | |
| 756 sscanf((char *)str, "0x%x", &id); | |
| 757 if (id == None) | |
| 758 EMSG2(_("E573: Invalid server id used: %s"), str); | |
| 759 | |
| 760 return (Window)id; | |
| 761 } | |
| 762 | |
| 763 /* | |
| 39 | 764 * Send a reply string (notification) to client with id "name". |
| 7 | 765 * Return -1 if the window is invalid. |
| 766 */ | |
| 767 int | |
| 768 serverSendReply(name, str) | |
| 769 char_u *name; | |
| 770 char_u *str; | |
| 771 { | |
| 772 char_u *property; | |
| 773 int length; | |
| 774 int res; | |
| 775 Display *dpy = X_DISPLAY; | |
| 776 Window win = serverStrToWin(name); | |
| 777 | |
| 778 if (commProperty == None) | |
| 779 { | |
| 780 if (SendInit(dpy) < 0) | |
| 781 return -2; | |
| 782 } | |
| 783 if (!WindowValid(dpy, win)) | |
| 784 return -1; | |
| 785 | |
| 39 | 786 #ifdef FEAT_MBYTE |
| 500 | 787 length = STRLEN(p_enc) + STRLEN(str) + 14; |
| 788 #else | |
| 789 length = STRLEN(str) + 10; | |
| 39 | 790 #endif |
| 791 if ((property = (char_u *)alloc((unsigned)length + 30)) != NULL) | |
| 7 | 792 { |
| 39 | 793 #ifdef FEAT_MBYTE |
| 794 sprintf((char *)property, "%cn%c-E %s%c-n %s%c-w %x", | |
| 795 0, 0, p_enc, 0, str, 0, (unsigned int)commWindow); | |
| 796 #else | |
| 797 sprintf((char *)property, "%cn%c-n %s%c-w %x", | |
| 798 0, 0, str, 0, (unsigned int)commWindow); | |
| 799 #endif | |
| 500 | 800 /* Add length of what "%x" resulted in. */ |
| 7 | 801 length += STRLEN(property + length); |
| 802 res = AppendPropCarefully(dpy, win, commProperty, property, length + 1); | |
| 803 vim_free(property); | |
| 804 return res; | |
| 805 } | |
| 806 return -1; | |
| 807 } | |
| 808 | |
| 809 static int | |
| 810 WaitForReply(p) | |
| 811 void *p; | |
| 812 { | |
| 813 Window *w = (Window *) p; | |
| 814 return ServerReplyFind(*w, SROP_Find) != NULL; | |
| 815 } | |
| 816 | |
| 817 /* | |
| 818 * Wait for replies from id (win) | |
| 819 * Return 0 and the malloc'ed string when a reply is available. | |
| 820 * Return -1 if the window becomes invalid while waiting. | |
| 821 */ | |
| 822 int | |
| 823 serverReadReply(dpy, win, str, localLoop) | |
| 824 Display *dpy; | |
| 825 Window win; | |
| 826 char_u **str; | |
| 827 int localLoop; | |
| 828 { | |
| 829 int len; | |
| 830 char_u *s; | |
| 831 struct ServerReply *p; | |
| 832 | |
| 833 ServerWait(dpy, win, WaitForReply, &win, localLoop, -1); | |
| 834 | |
| 835 if ((p = ServerReplyFind(win, SROP_Find)) != NULL && p->strings.ga_len > 0) | |
| 836 { | |
| 837 *str = vim_strsave(p->strings.ga_data); | |
| 838 len = STRLEN(*str) + 1; | |
| 839 if (len < p->strings.ga_len) | |
| 840 { | |
| 841 s = (char_u *) p->strings.ga_data; | |
| 842 mch_memmove(s, s + len, p->strings.ga_len - len); | |
| 843 p->strings.ga_len -= len; | |
| 844 } | |
| 845 else | |
| 846 { | |
| 847 /* Last string read. Remove from list */ | |
| 848 ga_clear(&p->strings); | |
| 849 ServerReplyFind(win, SROP_Delete); | |
| 850 } | |
| 851 return 0; | |
| 852 } | |
| 853 return -1; | |
| 854 } | |
| 855 | |
| 856 /* | |
| 857 * Check for replies from id (win). | |
| 858 * Return TRUE and a non-malloc'ed string if there is. Else return FALSE. | |
| 859 */ | |
| 860 int | |
| 861 serverPeekReply(dpy, win, str) | |
| 862 Display *dpy; | |
| 863 Window win; | |
| 864 char_u **str; | |
| 865 { | |
| 866 struct ServerReply *p; | |
| 867 | |
| 868 if ((p = ServerReplyFind(win, SROP_Find)) != NULL && p->strings.ga_len > 0) | |
| 869 { | |
| 870 if (str != NULL) | |
| 871 *str = p->strings.ga_data; | |
| 872 return 1; | |
| 873 } | |
| 874 if (!WindowValid(dpy, win)) | |
| 875 return -1; | |
| 876 return 0; | |
| 877 } | |
| 878 | |
| 879 | |
| 880 /* | |
| 881 * Initialize the communication channels for sending commands and receiving | |
| 882 * results. | |
| 883 */ | |
| 884 static int | |
| 885 SendInit(dpy) | |
| 886 Display *dpy; | |
| 887 { | |
| 888 XErrorHandler old_handler; | |
| 889 | |
| 890 /* | |
| 891 * Create the window used for communication, and set up an | |
| 892 * event handler for it. | |
| 893 */ | |
| 894 old_handler = XSetErrorHandler(x_error_check); | |
| 895 got_x_error = FALSE; | |
| 896 | |
| 897 if (commProperty == None) | |
| 898 commProperty = XInternAtom(dpy, "Comm", False); | |
| 899 if (vimProperty == None) | |
| 900 vimProperty = XInternAtom(dpy, "Vim", False); | |
| 901 if (registryProperty == None) | |
| 902 registryProperty = XInternAtom(dpy, "VimRegistry", False); | |
| 903 | |
| 904 if (commWindow == None) | |
| 905 { | |
| 906 commWindow = XCreateSimpleWindow(dpy, XDefaultRootWindow(dpy), | |
| 907 getpid(), 0, 10, 10, 0, | |
| 908 WhitePixel(dpy, DefaultScreen(dpy)), | |
| 909 WhitePixel(dpy, DefaultScreen(dpy))); | |
| 910 XSelectInput(dpy, commWindow, PropertyChangeMask); | |
| 911 /* WARNING: Do not step through this while debugging, it will hangup | |
| 912 * the X server! */ | |
| 913 XGrabServer(dpy); | |
| 914 DeleteAnyLingerer(dpy, commWindow); | |
| 915 XUngrabServer(dpy); | |
| 916 } | |
| 917 | |
| 918 /* Make window recognizable as a vim window */ | |
| 919 XChangeProperty(dpy, commWindow, vimProperty, XA_STRING, | |
| 920 8, PropModeReplace, (char_u *)VIM_VERSION_SHORT, | |
| 921 (int)STRLEN(VIM_VERSION_SHORT) + 1); | |
| 922 | |
| 923 XSync(dpy, False); | |
| 924 (void)XSetErrorHandler(old_handler); | |
| 925 | |
| 926 return got_x_error ? -1 : 0; | |
| 927 } | |
| 928 | |
| 929 /* | |
| 930 * Given a server name, see if the name exists in the registry for a | |
| 931 * particular display. | |
| 932 * | |
| 933 * If the given name is registered, return the ID of the window associated | |
| 934 * with the name. If the name isn't registered, then return 0. | |
| 935 * | |
| 936 * Side effects: | |
| 937 * If the registry property is improperly formed, then it is deleted. | |
| 938 * If "delete" is non-zero, then if the named server is found it is | |
| 939 * removed from the registry property. | |
| 940 */ | |
| 941 static Window | |
| 942 LookupName(dpy, name, delete, loose) | |
| 943 Display *dpy; /* Display whose registry to check. */ | |
| 944 char_u *name; /* Name of a server. */ | |
| 945 int delete; /* If non-zero, delete info about name. */ | |
| 946 char_u **loose; /* Do another search matching -999 if not found | |
| 947 Return result here if a match is found */ | |
| 948 { | |
| 949 char_u *regProp, *entry; | |
| 950 char_u *p; | |
| 951 long_u numItems; | |
| 952 int_u returnValue; | |
| 953 | |
| 954 /* | |
| 955 * Read the registry property. | |
| 956 */ | |
| 957 if (GetRegProp(dpy, ®Prop, &numItems, FALSE) == FAIL) | |
| 958 return 0; | |
| 959 | |
| 960 /* | |
| 961 * Scan the property for the desired name. | |
| 962 */ | |
| 963 returnValue = (int_u)None; | |
| 964 entry = NULL; /* Not needed, but eliminates compiler warning. */ | |
| 1880 | 965 for (p = regProp; (long_u)(p - regProp) < numItems; ) |
| 7 | 966 { |
| 967 entry = p; | |
| 968 while (*p != 0 && !isspace(*p)) | |
| 969 p++; | |
| 970 if (*p != 0 && STRICMP(name, p + 1) == 0) | |
| 971 { | |
| 972 sscanf((char *)entry, "%x", &returnValue); | |
| 973 break; | |
| 974 } | |
| 975 while (*p != 0) | |
| 976 p++; | |
| 977 p++; | |
| 978 } | |
| 979 | |
| 980 if (loose != NULL && returnValue == (int_u)None && !IsSerialName(name)) | |
| 981 { | |
| 1880 | 982 for (p = regProp; (long_u)(p - regProp) < numItems; ) |
| 7 | 983 { |
| 984 entry = p; | |
| 985 while (*p != 0 && !isspace(*p)) | |
| 986 p++; | |
| 987 if (*p != 0 && IsSerialName(p + 1) | |
| 988 && STRNICMP(name, p + 1, STRLEN(name)) == 0) | |
| 989 { | |
| 990 sscanf((char *)entry, "%x", &returnValue); | |
| 991 *loose = vim_strsave(p + 1); | |
| 992 break; | |
| 993 } | |
| 994 while (*p != 0) | |
| 995 p++; | |
| 996 p++; | |
| 997 } | |
| 998 } | |
| 999 | |
| 1000 /* | |
| 1001 * Delete the property, if that is desired (copy down the | |
| 1002 * remainder of the registry property to overlay the deleted | |
| 1003 * info, then rewrite the property). | |
| 1004 */ | |
| 1005 if (delete && returnValue != (int_u)None) | |
| 1006 { | |
| 1007 int count; | |
| 1008 | |
| 1009 while (*p != 0) | |
| 1010 p++; | |
| 1011 p++; | |
| 1012 count = numItems - (p - regProp); | |
| 1013 if (count > 0) | |
| 1740 | 1014 mch_memmove(entry, p, count); |
| 7 | 1015 XChangeProperty(dpy, RootWindow(dpy, 0), registryProperty, XA_STRING, |
| 1016 8, PropModeReplace, regProp, | |
| 1017 (int)(numItems - (p - entry))); | |
| 1018 XSync(dpy, False); | |
| 1019 } | |
| 1020 | |
| 1021 if (regProp != empty_prop) | |
| 1022 XFree(regProp); | |
| 1023 return (Window)returnValue; | |
| 1024 } | |
| 1025 | |
| 1026 /* | |
| 1197 | 1027 * Delete any lingering occurrence of window id. We promise that any |
| 1028 * occurrence is not ours since it is not yet put into the registry (by us) | |
| 7 | 1029 * |
| 1030 * This is necessary in the following scenario: | |
| 1031 * 1. There is an old windowid for an exit'ed vim in the registry | |
| 1032 * 2. We get that id for our commWindow but only want to send, not register. | |
| 1033 * 3. The window will mistakenly be regarded valid because of own commWindow | |
| 1034 */ | |
| 1035 static void | |
| 1036 DeleteAnyLingerer(dpy, win) | |
| 1037 Display *dpy; /* Display whose registry to check. */ | |
| 1038 Window win; /* Window to remove */ | |
| 1039 { | |
| 1040 char_u *regProp, *entry = NULL; | |
| 1041 char_u *p; | |
| 1042 long_u numItems; | |
| 28 | 1043 int_u wwin; |
| 7 | 1044 |
| 1045 /* | |
| 1046 * Read the registry property. | |
| 1047 */ | |
| 1048 if (GetRegProp(dpy, ®Prop, &numItems, FALSE) == FAIL) | |
| 1049 return; | |
| 1050 | |
| 1051 /* Scan the property for the window id. */ | |
| 1880 | 1052 for (p = regProp; (long_u)(p - regProp) < numItems; ) |
| 7 | 1053 { |
| 1054 if (*p != 0) | |
| 1055 { | |
| 28 | 1056 sscanf((char *)p, "%x", &wwin); |
| 1057 if ((Window)wwin == win) | |
| 7 | 1058 { |
| 1059 int lastHalf; | |
| 1060 | |
| 1061 /* Copy down the remainder to delete entry */ | |
| 1062 entry = p; | |
| 1063 while (*p != 0) | |
| 1064 p++; | |
| 1065 p++; | |
| 1066 lastHalf = numItems - (p - regProp); | |
| 1067 if (lastHalf > 0) | |
| 1740 | 1068 mch_memmove(entry, p, lastHalf); |
| 7 | 1069 numItems = (entry - regProp) + lastHalf; |
| 1070 p = entry; | |
| 1071 continue; | |
| 1072 } | |
| 1073 } | |
| 1074 while (*p != 0) | |
| 1075 p++; | |
| 1076 p++; | |
| 1077 } | |
| 1078 | |
| 1079 if (entry != NULL) | |
| 1080 { | |
| 1081 XChangeProperty(dpy, RootWindow(dpy, 0), registryProperty, | |
| 1082 XA_STRING, 8, PropModeReplace, regProp, | |
| 1083 (int)(p - regProp)); | |
| 1084 XSync(dpy, False); | |
| 1085 } | |
| 1086 | |
| 1087 if (regProp != empty_prop) | |
| 1088 XFree(regProp); | |
| 1089 } | |
| 1090 | |
| 1091 /* | |
| 1092 * Read the registry property. Delete it when it's formatted wrong. | |
| 1093 * Return the property in "regPropp". "empty_prop" is used when it doesn't | |
| 1094 * exist yet. | |
| 1095 * Return OK when successful. | |
| 1096 */ | |
| 1097 static int | |
| 1098 GetRegProp(dpy, regPropp, numItemsp, domsg) | |
| 1099 Display *dpy; | |
| 1100 char_u **regPropp; | |
| 1101 long_u *numItemsp; | |
| 1102 int domsg; /* When TRUE give error message. */ | |
| 1103 { | |
| 1104 int result, actualFormat; | |
| 1105 long_u bytesAfter; | |
| 1106 Atom actualType; | |
| 819 | 1107 XErrorHandler old_handler; |
| 7 | 1108 |
| 1109 *regPropp = NULL; | |
| 819 | 1110 old_handler = XSetErrorHandler(x_error_check); |
| 1111 got_x_error = FALSE; | |
| 1112 | |
| 7 | 1113 result = XGetWindowProperty(dpy, RootWindow(dpy, 0), registryProperty, 0L, |
| 1114 (long)MAX_PROP_WORDS, False, | |
| 1115 XA_STRING, &actualType, | |
| 1116 &actualFormat, numItemsp, &bytesAfter, | |
| 1117 regPropp); | |
| 1118 | |
| 819 | 1119 XSync(dpy, FALSE); |
| 1120 (void)XSetErrorHandler(old_handler); | |
| 1121 if (got_x_error) | |
| 1122 return FAIL; | |
| 1123 | |
| 7 | 1124 if (actualType == None) |
| 1125 { | |
| 1126 /* No prop yet. Logically equal to the empty list */ | |
| 1127 *numItemsp = 0; | |
| 1128 *regPropp = empty_prop; | |
| 1129 return OK; | |
| 1130 } | |
| 1131 | |
| 1132 /* If the property is improperly formed, then delete it. */ | |
| 1133 if (result != Success || actualFormat != 8 || actualType != XA_STRING) | |
| 1134 { | |
| 1135 if (*regPropp != NULL) | |
| 1136 XFree(*regPropp); | |
| 1137 XDeleteProperty(dpy, RootWindow(dpy, 0), registryProperty); | |
| 1138 if (domsg) | |
| 1139 EMSG(_("E251: VIM instance registry property is badly formed. Deleted!")); | |
| 1140 return FAIL; | |
| 1141 } | |
| 1142 return OK; | |
| 1143 } | |
| 1144 | |
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1145 |
| 7 | 1146 /* |
| 1197 | 1147 * This procedure is invoked by the various X event loops throughout Vims when |
| 7 | 1148 * a property changes on the communication window. This procedure reads the |
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1149 * property and enqueues command requests and responses. If immediate is true, |
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1150 * it runs the event immediatly instead of enqueuing it. Immediate can cause |
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1151 * unintended behavior and should only be used for code that blocks for a |
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1152 * response. |
| 7 | 1153 */ |
| 1154 void | |
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1155 serverEventProc(dpy, eventPtr, immediate) |
| 7 | 1156 Display *dpy; |
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1157 XEvent *eventPtr; /* Information about event. */ |
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1158 int immediate; /* Run event immediately. Should mostly be 0. */ |
| 7 | 1159 { |
| 1160 char_u *propInfo; | |
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1161 int result, actualFormat; |
| 7 | 1162 long_u numItems, bytesAfter; |
| 1163 Atom actualType; | |
| 1164 | |
| 1165 if (eventPtr != NULL) | |
| 1166 { | |
| 1167 if (eventPtr->xproperty.atom != commProperty | |
| 1168 || eventPtr->xproperty.state != PropertyNewValue) | |
| 1169 return; | |
| 1170 } | |
| 1171 | |
| 1172 /* | |
| 1173 * Read the comm property and delete it. | |
| 1174 */ | |
| 1175 propInfo = NULL; | |
| 1176 result = XGetWindowProperty(dpy, commWindow, commProperty, 0L, | |
| 1177 (long)MAX_PROP_WORDS, True, | |
| 1178 XA_STRING, &actualType, | |
| 1179 &actualFormat, &numItems, &bytesAfter, | |
| 1180 &propInfo); | |
| 1181 | |
| 1182 /* If the property doesn't exist or is improperly formed then ignore it. */ | |
| 1183 if (result != Success || actualType != XA_STRING || actualFormat != 8) | |
| 1184 { | |
| 1185 if (propInfo != NULL) | |
| 1186 XFree(propInfo); | |
| 1187 return; | |
| 1188 } | |
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1189 if (immediate) |
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1190 server_parse_message(dpy, propInfo, numItems); |
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1191 else |
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1192 save_in_queue(propInfo, numItems); |
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1193 } |
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1194 |
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1195 /* |
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1196 * Saves x clientserver commands in a queue so that they can be called when |
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1197 * vim is idle. |
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1198 */ |
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1199 static void |
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1200 save_in_queue(propInfo, len) |
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1201 char_u *propInfo; |
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1202 long_u len; |
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1203 { |
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1204 x_queue_T *node; |
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1205 |
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1206 node = (x_queue_T *)alloc(sizeof(x_queue_T)); |
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1207 if (node == NULL) |
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1208 return; /* out of memory */ |
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1209 node->propInfo = propInfo; |
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1210 node->len = len; |
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1211 |
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1212 if (head.next == NULL) /* initialize circular queue */ |
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1213 { |
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1214 head.next = &head; |
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1215 head.prev = &head; |
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1216 } |
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1217 |
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1218 /* insert node at tail of queue */ |
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1219 node->next = &head; |
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1220 node->prev = head.prev; |
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1221 head.prev->next = node; |
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1222 head.prev = node; |
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1223 } |
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1224 |
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1225 /* |
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1226 * Parses queued clientserver messages. |
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1227 */ |
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1228 void |
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1229 server_parse_messages() |
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1230 { |
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1231 x_queue_T *node; |
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1232 |
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1233 if (!X_DISPLAY) |
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1234 return; /* cannot happen? */ |
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1235 while (head.next != NULL && head.next != &head) |
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1236 { |
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1237 node = head.next; |
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1238 head.next = node->next; |
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1239 node->next->prev = node->prev; |
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1240 server_parse_message(X_DISPLAY, node->propInfo, node->len); |
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1241 vim_free(node); |
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1242 } |
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1243 } |
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1244 |
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1245 /* |
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1246 * Returns a non-zero value if there are clientserver messages waiting |
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1247 * int the queue. |
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1248 */ |
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1249 int |
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1250 server_waiting() |
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1251 { |
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1252 return head.next != NULL && head.next != &head; |
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1253 } |
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1254 |
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1255 /* |
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1256 * Prases a single clientserver message. A single message may contain multiple |
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1257 * commands. |
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1258 * "propInfo" will be freed. |
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1259 */ |
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1260 static void |
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1261 server_parse_message(dpy, propInfo, numItems) |
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1262 Display *dpy; |
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1263 char_u *propInfo; /* A string containing 0 or more X commands */ |
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7123
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1264 long_u numItems; /* The size of propInfo in bytes. */ |
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1265 { |
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1266 char_u *p; |
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1267 int code; |
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1268 char_u *tofree; |
| 7 | 1269 |
| 1270 /* | |
| 1271 * Several commands and results could arrive in the property at | |
| 1272 * one time; each iteration through the outer loop handles a | |
| 1273 * single command or result. | |
| 1274 */ | |
| 1880 | 1275 for (p = propInfo; (long_u)(p - propInfo) < numItems; ) |
| 7 | 1276 { |
| 1277 /* | |
| 1278 * Ignore leading NULs; each command or result starts with a | |
| 1279 * NUL so that no matter how badly formed a preceding command | |
| 1280 * is, we'll be able to tell that a new command/result is | |
| 1281 * starting. | |
| 1282 */ | |
| 1283 if (*p == 0) | |
| 1284 { | |
| 1285 p++; | |
| 1286 continue; | |
| 1287 } | |
| 1288 | |
| 1289 if ((*p == 'c' || *p == 'k') && (p[1] == 0)) | |
| 1290 { | |
| 1291 Window resWindow; | |
| 3668 | 1292 char_u *name, *script, *serial, *end; |
| 7 | 1293 Bool asKeys = *p == 'k'; |
| 39 | 1294 char_u *enc; |
| 7 | 1295 |
| 1296 /* | |
| 1297 * This is an incoming command from some other application. | |
| 1298 * Iterate over all of its options. Stop when we reach | |
| 1299 * the end of the property or something that doesn't look | |
| 1300 * like an option. | |
| 1301 */ | |
| 1302 p += 2; | |
| 1303 name = NULL; | |
| 1304 resWindow = None; | |
| 1305 serial = (char_u *)""; | |
| 1306 script = NULL; | |
| 39 | 1307 enc = NULL; |
| 1880 | 1308 while ((long_u)(p - propInfo) < numItems && *p == '-') |
| 7 | 1309 { |
| 1310 switch (p[1]) | |
| 1311 { | |
| 1312 case 'r': | |
| 1313 end = skipwhite(p + 2); | |
| 1314 resWindow = 0; | |
| 1315 while (vim_isxdigit(*end)) | |
| 1316 { | |
| 1317 resWindow = 16 * resWindow + (long_u)hex2nr(*end); | |
| 1318 ++end; | |
| 1319 } | |
| 1320 if (end == p + 2 || *end != ' ') | |
| 1321 resWindow = None; | |
| 1322 else | |
| 1323 { | |
| 1324 p = serial = end + 1; | |
| 1325 clientWindow = resWindow; /* Remember in global */ | |
| 1326 } | |
| 1327 break; | |
| 1328 case 'n': | |
| 1329 if (p[2] == ' ') | |
| 1330 name = p + 3; | |
| 1331 break; | |
| 1332 case 's': | |
| 1333 if (p[2] == ' ') | |
| 1334 script = p + 3; | |
| 1335 break; | |
| 39 | 1336 case 'E': |
| 1337 if (p[2] == ' ') | |
| 1338 enc = p + 3; | |
| 1339 break; | |
| 7 | 1340 } |
| 1341 while (*p != 0) | |
| 1342 p++; | |
| 1343 p++; | |
| 1344 } | |
| 1345 | |
| 1346 if (script == NULL || name == NULL) | |
| 1347 continue; | |
| 1348 | |
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1349 if (serverName != NULL && STRICMP(name, serverName) == 0) |
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1350 { |
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1351 script = serverConvert(enc, script, &tofree); |
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1352 if (asKeys) |
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1353 server_to_input_buf(script); |
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1354 else |
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1355 { |
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1356 char_u *res; |
| 3668 | 1357 |
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1358 res = eval_client_expr_to_string(script); |
| 3668 | 1359 if (resWindow != None) |
| 1360 { | |
| 1361 garray_T reply; | |
| 1362 | |
| 1363 /* Initialize the result property. */ | |
| 1364 ga_init2(&reply, 1, 100); | |
| 39 | 1365 #ifdef FEAT_MBYTE |
| 7009 | 1366 (void)ga_grow(&reply, 50 + STRLEN(p_enc)); |
| 3668 | 1367 sprintf(reply.ga_data, "%cr%c-E %s%c-s %s%c-r ", |
| 39 | 1368 0, 0, p_enc, 0, serial, 0); |
| 3668 | 1369 reply.ga_len = 14 + STRLEN(p_enc) + STRLEN(serial); |
| 39 | 1370 #else |
| 7009 | 1371 (void)ga_grow(&reply, 50); |
| 3668 | 1372 sprintf(reply.ga_data, "%cr%c-s %s%c-r ", |
| 1373 0, 0, serial, 0); | |
| 1374 reply.ga_len = 10 + STRLEN(serial); | |
| 39 | 1375 #endif |
| 3668 | 1376 |
| 1377 /* Evaluate the expression and return the result. */ | |
| 1378 if (res != NULL) | |
| 1379 ga_concat(&reply, res); | |
| 1380 else | |
| 1381 { | |
| 1382 ga_concat(&reply, (char_u *)_(e_invexprmsg)); | |
| 1383 ga_append(&reply, 0); | |
| 1384 ga_concat(&reply, (char_u *)"-c 1"); | |
| 1385 } | |
| 1386 ga_append(&reply, NUL); | |
| 1387 (void)AppendPropCarefully(dpy, resWindow, commProperty, | |
| 1388 reply.ga_data, reply.ga_len); | |
| 1389 ga_clear(&reply); | |
| 1390 } | |
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1391 vim_free(res); |
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1392 } |
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1393 vim_free(tofree); |
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1394 } |
| 7 | 1395 } |
| 1396 else if (*p == 'r' && p[1] == 0) | |
| 1397 { | |
| 39 | 1398 int serial, gotSerial; |
| 1399 char_u *res; | |
| 1400 PendingCommand *pcPtr; | |
| 1401 char_u *enc; | |
| 7 | 1402 |
| 1403 /* | |
| 1404 * This is a reply to some command that we sent out. Iterate | |
| 1405 * over all of its options. Stop when we reach the end of the | |
| 1406 * property or something that doesn't look like an option. | |
| 1407 */ | |
| 1408 p += 2; | |
| 1409 gotSerial = 0; | |
| 1410 res = (char_u *)""; | |
| 1411 code = 0; | |
| 39 | 1412 enc = NULL; |
| 1880 | 1413 while ((long_u)(p - propInfo) < numItems && *p == '-') |
| 7 | 1414 { |
| 1415 switch (p[1]) | |
| 1416 { | |
| 1417 case 'r': | |
| 1418 if (p[2] == ' ') | |
| 1419 res = p + 3; | |
| 1420 break; | |
| 39 | 1421 case 'E': |
| 1422 if (p[2] == ' ') | |
| 1423 enc = p + 3; | |
| 1424 break; | |
| 7 | 1425 case 's': |
| 1426 if (sscanf((char *)p + 2, " %d", &serial) == 1) | |
| 1427 gotSerial = 1; | |
| 1428 break; | |
| 1429 case 'c': | |
| 1430 if (sscanf((char *)p + 2, " %d", &code) != 1) | |
| 1431 code = 0; | |
| 1432 break; | |
| 1433 } | |
| 1434 while (*p != 0) | |
| 1435 p++; | |
| 1436 p++; | |
| 1437 } | |
| 1438 | |
| 1439 if (!gotSerial) | |
| 1440 continue; | |
| 1441 | |
| 1442 /* | |
| 1443 * Give the result information to anyone who's | |
| 1444 * waiting for it. | |
| 1445 */ | |
| 1446 for (pcPtr = pendingCommands; pcPtr != NULL; pcPtr = pcPtr->nextPtr) | |
| 1447 { | |
| 1448 if (serial != pcPtr->serial || pcPtr->result != NULL) | |
| 1449 continue; | |
| 1450 | |
| 1451 pcPtr->code = code; | |
| 7009 | 1452 res = serverConvert(enc, res, &tofree); |
| 1453 if (tofree == NULL) | |
| 1454 res = vim_strsave(res); | |
| 1455 pcPtr->result = res; | |
| 7 | 1456 break; |
| 1457 } | |
| 1458 } | |
| 1459 else if (*p == 'n' && p[1] == 0) | |
| 1460 { | |
| 1461 Window win = 0; | |
| 1462 unsigned int u; | |
| 1463 int gotWindow; | |
| 1464 char_u *str; | |
| 1465 struct ServerReply *r; | |
| 39 | 1466 char_u *enc; |
| 7 | 1467 |
| 1468 /* | |
| 1469 * This is a (n)otification. Sent with serverreply_send in VimL. | |
| 1470 * Execute any autocommand and save it for later retrieval | |
| 1471 */ | |
| 1472 p += 2; | |
| 1473 gotWindow = 0; | |
| 1474 str = (char_u *)""; | |
| 39 | 1475 enc = NULL; |
| 1880 | 1476 while ((long_u)(p - propInfo) < numItems && *p == '-') |
| 7 | 1477 { |
| 1478 switch (p[1]) | |
| 1479 { | |
| 1480 case 'n': | |
| 1481 if (p[2] == ' ') | |
| 1482 str = p + 3; | |
| 1483 break; | |
| 39 | 1484 case 'E': |
| 1485 if (p[2] == ' ') | |
| 1486 enc = p + 3; | |
| 1487 break; | |
| 7 | 1488 case 'w': |
| 1489 if (sscanf((char *)p + 2, " %x", &u) == 1) | |
| 1490 { | |
| 1491 win = u; | |
| 1492 gotWindow = 1; | |
| 1493 } | |
| 1494 break; | |
| 1495 } | |
| 1496 while (*p != 0) | |
| 1497 p++; | |
| 1498 p++; | |
| 1499 } | |
| 1500 | |
| 1501 if (!gotWindow) | |
| 1502 continue; | |
| 39 | 1503 str = serverConvert(enc, str, &tofree); |
| 7 | 1504 if ((r = ServerReplyFind(win, SROP_Add)) != NULL) |
| 1505 { | |
| 1506 ga_concat(&(r->strings), str); | |
| 21 | 1507 ga_append(&(r->strings), NUL); |
| 7 | 1508 } |
| 1509 #ifdef FEAT_AUTOCMD | |
| 1698 | 1510 { |
| 1511 char_u winstr[30]; | |
| 1512 | |
| 1513 sprintf((char *)winstr, "0x%x", (unsigned int)win); | |
| 1514 apply_autocmds(EVENT_REMOTEREPLY, winstr, str, TRUE, curbuf); | |
| 1515 } | |
| 7 | 1516 #endif |
| 39 | 1517 vim_free(tofree); |
| 7 | 1518 } |
| 1519 else | |
| 1520 { | |
| 1521 /* | |
| 1522 * Didn't recognize this thing. Just skip through the next | |
| 1523 * null character and try again. | |
| 1524 * Even if we get an 'r'(eply) we will throw it away as we | |
| 1525 * never specify (and thus expect) one | |
| 1526 */ | |
| 1527 while (*p != 0) | |
| 1528 p++; | |
| 1529 p++; | |
| 1530 } | |
| 1531 } | |
| 1532 XFree(propInfo); | |
| 1533 } | |
| 1534 | |
| 1535 /* | |
| 1536 * Append a given property to a given window, but set up an X error handler so | |
| 1537 * that if the append fails this procedure can return an error code rather | |
| 1538 * than having Xlib panic. | |
| 1539 * Return: 0 for OK, -1 for error | |
| 1540 */ | |
| 1541 static int | |
| 1542 AppendPropCarefully(dpy, window, property, value, length) | |
| 1543 Display *dpy; /* Display on which to operate. */ | |
| 1544 Window window; /* Window whose property is to be modified. */ | |
| 1545 Atom property; /* Name of property. */ | |
| 1546 char_u *value; /* Characters to append to property. */ | |
| 1547 int length; /* How much to append */ | |
| 1548 { | |
| 1549 XErrorHandler old_handler; | |
| 1550 | |
| 1551 old_handler = XSetErrorHandler(x_error_check); | |
| 1552 got_x_error = FALSE; | |
| 1553 XChangeProperty(dpy, window, property, XA_STRING, 8, | |
| 1554 PropModeAppend, value, length); | |
| 1555 XSync(dpy, False); | |
| 1556 (void) XSetErrorHandler(old_handler); | |
| 1557 return got_x_error ? -1 : 0; | |
| 1558 } | |
| 1559 | |
| 1560 | |
| 1561 /* | |
| 1562 * Another X Error handler, just used to check for errors. | |
| 1563 */ | |
| 1564 static int | |
| 1565 x_error_check(dpy, error_event) | |
| 1880 | 1566 Display *dpy UNUSED; |
| 1567 XErrorEvent *error_event UNUSED; | |
| 7 | 1568 { |
| 1569 got_x_error = TRUE; | |
| 1570 return 0; | |
| 1571 } | |
| 1572 | |
| 1573 /* | |
| 1574 * Check if "str" looks like it had a serial number appended. | |
| 1575 * Actually just checks if the name ends in a digit. | |
| 1576 */ | |
| 1577 static int | |
| 1578 IsSerialName(str) | |
| 1579 char_u *str; | |
| 1580 { | |
| 1581 int len = STRLEN(str); | |
| 1582 | |
| 1583 return (len > 1 && vim_isdigit(str[len - 1])); | |
| 1584 } | |
| 1585 #endif /* FEAT_CLIENTSERVER */ |