Mercurial > vim
annotate src/if_xcmdsrv.c @ 22023:67d3826948ad v8.2.1561
patch 8.2.1561: using NULL pointers in fold code
Commit: https://github.com/vim/vim/commit/81fcb67fb32a12414512b72e691a1bbbff9f8511
Author: Bram Moolenaar <Bram@vim.org>
Date: Tue Sep 1 21:21:24 2020 +0200
patch 8.2.1561: using NULL pointers in fold code
Problem: Using NULL pointers in fold code.
Solution: Avoid using a NULL pointer. (Dominique Pell?, closes https://github.com/vim/vim/issues/6831,
closes #6831)
| author | Bram Moolenaar <Bram@vim.org> |
|---|---|
| date | Tue, 01 Sep 2020 21:30:04 +0200 |
| parents | f0f9692d4487 |
| children | a2e6da79274d |
| rev | line source |
|---|---|
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1 /* vi:set ts=8 sts=4 sw=4 noet: |
| 7 | 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 { | |
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67 int serial; // Serial number expected in result. |
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68 int code; // Result Code. 0 is OK |
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69 char_u *result; // String result for command (malloc'ed). |
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70 // NULL means command still pending. |
| 7 | 71 struct PendingCommand *nextPtr; |
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72 // Next in list of all outstanding commands. |
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73 // NULL means end of list. |
| 7 | 74 } PendingCommand; |
| 75 | |
| 76 static PendingCommand *pendingCommands = NULL; | |
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77 // List of all commands currently |
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78 // being waited for. |
| 7 | 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 | |
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170 typedef int (*EndCond)(void *); |
| 7 | 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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181 |
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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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184 |
| 7 | 185 /* |
| 186 * Forward declarations for procedures defined later in this file: | |
| 187 */ | |
| 188 | |
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189 static Window LookupName(Display *dpy, char_u *name, int delete, char_u **loose); |
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190 static int SendInit(Display *dpy); |
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191 static int DoRegisterName(Display *dpy, char_u *name); |
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192 static void DeleteAnyLingerer(Display *dpy, Window w); |
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193 static int GetRegProp(Display *dpy, char_u **regPropp, long_u *numItemsp, int domsg); |
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194 static int WaitForPend(void *p); |
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195 static int WindowValid(Display *dpy, Window w); |
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196 static void ServerWait(Display *dpy, Window w, EndCond endCond, void *endData, int localLoop, int seconds); |
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197 static int AppendPropCarefully(Display *display, Window window, Atom property, char_u *value, int length); |
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198 static int x_error_check(Display *dpy, XErrorEvent *error_event); |
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199 static int IsSerialName(char_u *name); |
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200 static void save_in_queue(char_u *buf, long_u len); |
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201 static void server_parse_message(Display *dpy, char_u *propInfo, long_u numItems); |
| 7 | 202 |
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203 // Private variables for the "server" functionality |
| 7 | 204 static Atom registryProperty = None; |
| 205 static Atom vimProperty = None; | |
| 206 static int got_x_error = FALSE; | |
| 207 | |
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208 static char_u *empty_prop = (char_u *)""; // empty GetRegProp() result |
| 7 | 209 |
| 210 /* | |
| 211 * Associate an ASCII name with Vim. Try real hard to get a unique one. | |
| 212 * Returns FAIL or OK. | |
| 213 */ | |
| 214 int | |
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215 serverRegisterName( |
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216 Display *dpy, // display to register with |
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217 char_u *name) // the name that will be used as a base |
| 7 | 218 { |
| 219 int i; | |
| 220 int res; | |
| 221 char_u *p = NULL; | |
| 222 | |
| 223 res = DoRegisterName(dpy, name); | |
| 224 if (res < 0) | |
| 225 { | |
| 226 i = 1; | |
| 227 do | |
| 228 { | |
| 229 if (res < -1 || i >= 1000) | |
| 230 { | |
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231 msg_attr(_("Unable to register a command server name"), |
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232 HL_ATTR(HLF_W)); |
| 7 | 233 return FAIL; |
| 234 } | |
| 235 if (p == NULL) | |
| 236 p = alloc(STRLEN(name) + 10); | |
| 237 if (p == NULL) | |
| 238 { | |
| 239 res = -10; | |
| 240 continue; | |
| 241 } | |
| 242 sprintf((char *)p, "%s%d", name, i++); | |
| 243 res = DoRegisterName(dpy, p); | |
| 244 } | |
| 245 while (res < 0) | |
| 246 ; | |
| 247 vim_free(p); | |
| 248 } | |
| 249 return OK; | |
| 250 } | |
| 251 | |
| 252 static int | |
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253 DoRegisterName(Display *dpy, char_u *name) |
| 7 | 254 { |
| 255 Window w; | |
| 256 XErrorHandler old_handler; | |
| 257 #define MAX_NAME_LENGTH 100 | |
| 258 char_u propInfo[MAX_NAME_LENGTH + 20]; | |
| 259 | |
| 260 if (commProperty == None) | |
| 261 { | |
| 262 if (SendInit(dpy) < 0) | |
| 263 return -2; | |
| 264 } | |
| 265 | |
| 266 /* | |
| 267 * Make sure the name is unique, and append info about it to | |
| 268 * the registry property. It's important to lock the server | |
| 269 * here to prevent conflicting changes to the registry property. | |
| 270 * WARNING: Do not step through this while debugging, it will hangup the X | |
| 271 * server! | |
| 272 */ | |
| 273 XGrabServer(dpy); | |
| 274 w = LookupName(dpy, name, FALSE, NULL); | |
| 275 if (w != (Window)0) | |
| 276 { | |
| 277 Status status; | |
| 278 int dummyInt; | |
| 279 unsigned int dummyUns; | |
| 280 Window dummyWin; | |
| 281 | |
| 282 /* | |
| 283 * The name is currently registered. See if the commWindow | |
| 284 * associated with the name exists. If not, or if the commWindow | |
| 285 * is *our* commWindow, then just unregister the old name (this | |
| 286 * could happen if an application dies without cleaning up the | |
| 287 * registry). | |
| 288 */ | |
| 289 old_handler = XSetErrorHandler(x_error_check); | |
| 290 status = XGetGeometry(dpy, w, &dummyWin, &dummyInt, &dummyInt, | |
| 291 &dummyUns, &dummyUns, &dummyUns, &dummyUns); | |
| 292 (void)XSetErrorHandler(old_handler); | |
| 293 if (status != Success && w != commWindow) | |
| 294 { | |
| 295 XUngrabServer(dpy); | |
| 296 XFlush(dpy); | |
| 297 return -1; | |
| 298 } | |
| 299 (void)LookupName(dpy, name, /*delete=*/TRUE, NULL); | |
| 300 } | |
| 301 sprintf((char *)propInfo, "%x %.*s", (int_u)commWindow, | |
| 302 MAX_NAME_LENGTH, name); | |
| 303 old_handler = XSetErrorHandler(x_error_check); | |
| 304 got_x_error = FALSE; | |
| 305 XChangeProperty(dpy, RootWindow(dpy, 0), registryProperty, XA_STRING, 8, | |
| 306 PropModeAppend, propInfo, STRLEN(propInfo) + 1); | |
| 307 XUngrabServer(dpy); | |
| 308 XSync(dpy, False); | |
| 309 (void)XSetErrorHandler(old_handler); | |
| 310 | |
| 311 if (!got_x_error) | |
| 312 { | |
| 313 #ifdef FEAT_EVAL | |
| 314 set_vim_var_string(VV_SEND_SERVER, name, -1); | |
| 315 #endif | |
| 316 serverName = vim_strsave(name); | |
| 317 #ifdef FEAT_TITLE | |
| 318 need_maketitle = TRUE; | |
| 319 #endif | |
| 320 return 0; | |
| 321 } | |
| 322 return -2; | |
| 323 } | |
| 324 | |
| 325 #if defined(FEAT_GUI) || defined(PROTO) | |
| 326 /* | |
| 327 * Clean out new ID from registry and set it as comm win. | |
| 328 * Change any registered window ID. | |
| 329 */ | |
| 330 void | |
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331 serverChangeRegisteredWindow( |
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332 Display *dpy, // Display to register with |
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333 Window newwin) // Re-register to this ID |
| 7 | 334 { |
| 335 char_u propInfo[MAX_NAME_LENGTH + 20]; | |
| 336 | |
| 337 commWindow = newwin; | |
| 338 | |
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339 // Always call SendInit() here, to make sure commWindow is marked as a Vim |
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340 // window. |
| 7 | 341 if (SendInit(dpy) < 0) |
| 342 return; | |
| 343 | |
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344 // WARNING: Do not step through this while debugging, it will hangup the X |
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345 // server! |
| 7 | 346 XGrabServer(dpy); |
| 347 DeleteAnyLingerer(dpy, newwin); | |
| 348 if (serverName != NULL) | |
| 349 { | |
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350 // Reinsert name if we was already registered |
| 7 | 351 (void)LookupName(dpy, serverName, /*delete=*/TRUE, NULL); |
| 352 sprintf((char *)propInfo, "%x %.*s", | |
| 353 (int_u)newwin, MAX_NAME_LENGTH, serverName); | |
| 354 XChangeProperty(dpy, RootWindow(dpy, 0), registryProperty, XA_STRING, 8, | |
| 355 PropModeAppend, (char_u *)propInfo, | |
| 356 STRLEN(propInfo) + 1); | |
| 357 } | |
| 358 XUngrabServer(dpy); | |
| 359 } | |
| 360 #endif | |
| 361 | |
| 362 /* | |
| 363 * Send to an instance of Vim via the X display. | |
| 364 * Returns 0 for OK, negative for an error. | |
| 365 */ | |
| 366 int | |
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367 serverSendToVim( |
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368 Display *dpy, // Where to send. |
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369 char_u *name, // Where to send. |
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370 char_u *cmd, // What to send. |
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371 char_u **result, // Result of eval'ed expression |
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372 Window *server, // Actual ID of receiving app |
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373 Bool asExpr, // Interpret as keystrokes or expr ? |
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374 int timeout, // seconds to wait or zero |
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375 Bool localLoop, // Throw away everything but result |
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376 int silent) // don't complain about no server |
| 7 | 377 { |
| 378 Window w; | |
| 379 char_u *property; | |
| 380 int length; | |
| 381 int res; | |
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382 static int serial = 0; // Running count of sent commands. |
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383 // Used to give each command a |
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384 // different serial number. |
| 7 | 385 PendingCommand pending; |
| 386 char_u *loosename = NULL; | |
| 387 | |
| 388 if (result != NULL) | |
| 389 *result = NULL; | |
| 390 if (name == NULL || *name == NUL) | |
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391 name = (char_u *)"GVIM"; // use a default name |
| 7 | 392 |
| 393 if (commProperty == None && dpy != NULL) | |
| 394 { | |
| 395 if (SendInit(dpy) < 0) | |
| 396 return -1; | |
| 397 } | |
| 398 | |
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399 // Execute locally if no display or target is ourselves |
| 7 | 400 if (dpy == NULL || (serverName != NULL && STRICMP(name, serverName) == 0)) |
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401 return sendToLocalVim(cmd, asExpr, result); |
| 7 | 402 |
| 403 /* | |
| 404 * Bind the server name to a communication window. | |
| 405 * | |
| 406 * Find any survivor with a serialno attached to the name if the | |
| 407 * original registrant of the wanted name is no longer present. | |
| 408 * | |
| 409 * Delete any lingering names from dead editors. | |
| 410 */ | |
| 411 while (TRUE) | |
| 412 { | |
| 413 w = LookupName(dpy, name, FALSE, &loosename); | |
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414 // Check that the window is hot |
| 7 | 415 if (w != None) |
| 416 { | |
| 417 if (!WindowValid(dpy, w)) | |
| 418 { | |
| 419 LookupName(dpy, loosename ? loosename : name, | |
| 420 /*DELETE=*/TRUE, NULL); | |
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421 vim_free(loosename); |
| 7 | 422 continue; |
| 423 } | |
| 424 } | |
| 425 break; | |
| 426 } | |
| 427 if (w == None) | |
| 428 { | |
| 429 if (!silent) | |
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430 semsg(_(e_noserver), name); |
| 7 | 431 return -1; |
| 432 } | |
| 433 else if (loosename != NULL) | |
| 434 name = loosename; | |
| 435 if (server != NULL) | |
| 436 *server = w; | |
| 437 | |
| 438 /* | |
| 439 * Send the command to target interpreter by appending it to the | |
| 440 * comm window in the communication window. | |
| 500 | 441 * Length must be computed exactly! |
| 7 | 442 */ |
| 500 | 443 length = STRLEN(name) + STRLEN(p_enc) + STRLEN(cmd) + 14; |
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444 property = alloc(length + 30); |
| 7 | 445 |
| 39 | 446 sprintf((char *)property, "%c%c%c-n %s%c-E %s%c-s %s", |
| 447 0, asExpr ? 'c' : 'k', 0, name, 0, p_enc, 0, cmd); | |
| 7 | 448 if (name == loosename) |
| 449 vim_free(loosename); | |
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450 // Add a back reference to our comm window |
| 7 | 451 serial++; |
| 452 sprintf((char *)property + length, "%c-r %x %d", | |
| 453 0, (int_u)commWindow, serial); | |
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454 // Add length of what "-r %x %d" resulted in, skipping the NUL. |
| 7 | 455 length += STRLEN(property + length + 1) + 1; |
| 456 | |
| 457 res = AppendPropCarefully(dpy, w, commProperty, property, length + 1); | |
| 458 vim_free(property); | |
| 459 if (res < 0) | |
| 460 { | |
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461 emsg(_("E248: Failed to send command to the destination program")); |
| 7 | 462 return -1; |
| 463 } | |
| 464 | |
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465 if (!asExpr) // There is no answer for this - Keys are sent async |
| 7 | 466 return 0; |
| 467 | |
| 468 /* | |
| 469 * Register the fact that we're waiting for a command to | |
| 470 * complete (this is needed by SendEventProc and by | |
| 471 * AppendErrorProc to pass back the command's results). | |
| 472 */ | |
| 473 pending.serial = serial; | |
| 474 pending.code = 0; | |
| 475 pending.result = NULL; | |
| 476 pending.nextPtr = pendingCommands; | |
| 477 pendingCommands = &pending; | |
| 478 | |
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479 ServerWait(dpy, w, WaitForPend, &pending, localLoop, |
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480 timeout > 0 ? timeout : 600); |
| 7 | 481 |
| 482 /* | |
| 483 * Unregister the information about the pending command | |
| 484 * and return the result. | |
| 485 */ | |
| 486 if (pendingCommands == &pending) | |
| 487 pendingCommands = pending.nextPtr; | |
| 488 else | |
| 489 { | |
| 490 PendingCommand *pcPtr; | |
| 491 | |
| 492 for (pcPtr = pendingCommands; pcPtr != NULL; pcPtr = pcPtr->nextPtr) | |
| 493 if (pcPtr->nextPtr == &pending) | |
| 494 { | |
| 495 pcPtr->nextPtr = pending.nextPtr; | |
| 496 break; | |
| 497 } | |
| 498 } | |
| 499 if (result != NULL) | |
| 500 *result = pending.result; | |
| 501 else | |
| 502 vim_free(pending.result); | |
| 503 | |
| 504 return pending.code == 0 ? 0 : -1; | |
| 505 } | |
| 506 | |
| 507 static int | |
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508 WaitForPend(void *p) |
| 7 | 509 { |
| 510 PendingCommand *pending = (PendingCommand *) p; | |
| 511 return pending->result != NULL; | |
| 512 } | |
| 513 | |
| 514 /* | |
| 515 * Return TRUE if window "w" exists and has a "Vim" property on it. | |
| 516 */ | |
| 517 static int | |
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518 WindowValid(Display *dpy, Window w) |
| 7 | 519 { |
| 520 XErrorHandler old_handler; | |
| 521 Atom *plist; | |
| 522 int numProp; | |
| 523 int i; | |
| 524 | |
| 525 old_handler = XSetErrorHandler(x_error_check); | |
| 526 got_x_error = 0; | |
| 527 plist = XListProperties(dpy, w, &numProp); | |
| 528 XSync(dpy, False); | |
| 529 XSetErrorHandler(old_handler); | |
| 530 if (plist == NULL || got_x_error) | |
| 531 return FALSE; | |
| 532 | |
| 533 for (i = 0; i < numProp; i++) | |
| 534 if (plist[i] == vimProperty) | |
| 535 { | |
| 536 XFree(plist); | |
| 537 return TRUE; | |
| 538 } | |
| 539 XFree(plist); | |
| 540 return FALSE; | |
| 541 } | |
| 542 | |
| 543 /* | |
| 544 * Enter a loop processing X events & polling chars until we see a result | |
| 545 */ | |
| 546 static void | |
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547 ServerWait( |
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548 Display *dpy, |
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549 Window w, |
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550 EndCond endCond, |
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551 void *endData, |
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552 int localLoop, |
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553 int seconds) |
| 7 | 554 { |
| 555 time_t start; | |
| 556 time_t now; | |
| 557 XEvent event; | |
| 3670 | 558 |
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559 #define UI_MSEC_DELAY 53 |
| 3670 | 560 #define SEND_MSEC_POLL 500 |
| 561 #ifndef HAVE_SELECT | |
| 562 struct pollfd fds; | |
| 563 | |
| 564 fds.fd = ConnectionNumber(dpy); | |
| 565 fds.events = POLLIN; | |
| 566 #else | |
| 567 fd_set fds; | |
| 568 struct timeval tv; | |
| 569 | |
| 570 tv.tv_sec = 0; | |
| 571 tv.tv_usec = SEND_MSEC_POLL * 1000; | |
| 572 FD_ZERO(&fds); | |
| 573 FD_SET(ConnectionNumber(dpy), &fds); | |
| 574 #endif | |
| 7 | 575 |
| 576 time(&start); | |
| 3670 | 577 while (TRUE) |
| 7 | 578 { |
| 3670 | 579 while (XCheckWindowEvent(dpy, commWindow, PropertyChangeMask, &event)) |
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580 serverEventProc(dpy, &event, 1); |
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581 server_parse_messages(); |
| 3670 | 582 |
| 583 if (endCond(endData) != 0) | |
| 584 break; | |
| 585 if (!WindowValid(dpy, w)) | |
| 586 break; | |
| 7 | 587 time(&now); |
| 588 if (seconds >= 0 && (now - start) >= seconds) | |
| 589 break; | |
| 3670 | 590 |
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591 #ifdef FEAT_TIMERS |
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592 check_due_timer(); |
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593 #endif |
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594 |
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595 // Just look out for the answer without calling back into Vim |
| 7 | 596 if (localLoop) |
| 597 { | |
| 598 #ifndef HAVE_SELECT | |
| 599 if (poll(&fds, 1, SEND_MSEC_POLL) < 0) | |
| 600 break; | |
| 601 #else | |
| 3670 | 602 if (select(FD_SETSIZE, &fds, NULL, NULL, &tv) < 0) |
| 7 | 603 break; |
| 604 #endif | |
| 605 } | |
| 606 else | |
| 607 { | |
| 608 if (got_int) | |
| 609 break; | |
| 3670 | 610 ui_delay((long)UI_MSEC_DELAY, TRUE); |
| 7 | 611 ui_breakcheck(); |
| 612 } | |
| 613 } | |
| 614 } | |
| 615 | |
| 616 | |
| 617 /* | |
| 618 * Fetch a list of all the Vim instance names currently registered for the | |
| 619 * display. | |
| 620 * | |
| 621 * Returns a newline separated list in allocated memory or NULL. | |
| 622 */ | |
| 623 char_u * | |
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624 serverGetVimNames(Display *dpy) |
| 7 | 625 { |
| 626 char_u *regProp; | |
| 627 char_u *entry; | |
| 628 char_u *p; | |
| 629 long_u numItems; | |
| 630 int_u w; | |
| 631 garray_T ga; | |
| 632 | |
| 633 if (registryProperty == None) | |
| 634 { | |
| 635 if (SendInit(dpy) < 0) | |
| 636 return NULL; | |
| 637 } | |
| 638 | |
| 639 /* | |
| 640 * Read the registry property. | |
| 641 */ | |
| 642 if (GetRegProp(dpy, ®Prop, &numItems, TRUE) == FAIL) | |
| 643 return NULL; | |
| 644 | |
| 645 /* | |
| 646 * Scan all of the names out of the property. | |
| 647 */ | |
| 648 ga_init2(&ga, 1, 100); | |
| 1880 | 649 for (p = regProp; (long_u)(p - regProp) < numItems; p++) |
| 7 | 650 { |
| 651 entry = p; | |
| 652 while (*p != 0 && !isspace(*p)) | |
| 653 p++; | |
| 654 if (*p != 0) | |
| 655 { | |
| 656 w = None; | |
| 657 sscanf((char *)entry, "%x", &w); | |
| 658 if (WindowValid(dpy, (Window)w)) | |
| 659 { | |
| 660 ga_concat(&ga, p + 1); | |
| 661 ga_concat(&ga, (char_u *)"\n"); | |
| 662 } | |
| 663 while (*p != 0) | |
| 664 p++; | |
| 665 } | |
| 666 } | |
| 667 if (regProp != empty_prop) | |
| 668 XFree(regProp); | |
| 21 | 669 ga_append(&ga, NUL); |
| 7 | 670 return ga.ga_data; |
| 671 } | |
| 672 | |
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673 ///////////////////////////////////////////////////////////// |
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674 // Reply stuff |
| 7 | 675 |
| 676 static struct ServerReply * | |
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677 ServerReplyFind(Window w, enum ServerReplyOp op) |
| 7 | 678 { |
| 679 struct ServerReply *p; | |
| 680 struct ServerReply e; | |
| 681 int i; | |
| 682 | |
| 683 p = (struct ServerReply *) serverReply.ga_data; | |
| 684 for (i = 0; i < serverReply.ga_len; i++, p++) | |
| 685 if (p->id == w) | |
| 686 break; | |
| 687 if (i >= serverReply.ga_len) | |
| 688 p = NULL; | |
| 689 | |
| 690 if (p == NULL && op == SROP_Add) | |
| 691 { | |
| 692 if (serverReply.ga_growsize == 0) | |
| 693 ga_init2(&serverReply, sizeof(struct ServerReply), 1); | |
| 694 if (ga_grow(&serverReply, 1) == OK) | |
| 695 { | |
| 696 p = ((struct ServerReply *) serverReply.ga_data) | |
| 697 + serverReply.ga_len; | |
| 698 e.id = w; | |
| 699 ga_init2(&e.strings, 1, 100); | |
| 1740 | 700 mch_memmove(p, &e, sizeof(e)); |
| 7 | 701 serverReply.ga_len++; |
| 702 } | |
| 703 } | |
| 704 else if (p != NULL && op == SROP_Delete) | |
| 705 { | |
| 706 ga_clear(&p->strings); | |
| 707 mch_memmove(p, p + 1, (serverReply.ga_len - i - 1) * sizeof(*p)); | |
| 708 serverReply.ga_len--; | |
| 709 } | |
| 710 | |
| 711 return p; | |
| 712 } | |
| 713 | |
| 714 /* | |
| 715 * Convert string to windowid. | |
| 716 * Issue an error if the id is invalid. | |
| 717 */ | |
| 718 Window | |
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719 serverStrToWin(char_u *str) |
| 7 | 720 { |
| 721 unsigned id = None; | |
| 722 | |
| 723 sscanf((char *)str, "0x%x", &id); | |
| 724 if (id == None) | |
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725 semsg(_("E573: Invalid server id used: %s"), str); |
| 7 | 726 |
| 727 return (Window)id; | |
| 728 } | |
| 729 | |
| 730 /* | |
| 39 | 731 * Send a reply string (notification) to client with id "name". |
| 7 | 732 * Return -1 if the window is invalid. |
| 733 */ | |
| 734 int | |
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735 serverSendReply(char_u *name, char_u *str) |
| 7 | 736 { |
| 737 char_u *property; | |
| 738 int length; | |
| 739 int res; | |
| 740 Display *dpy = X_DISPLAY; | |
| 741 Window win = serverStrToWin(name); | |
| 742 | |
| 743 if (commProperty == None) | |
| 744 { | |
| 745 if (SendInit(dpy) < 0) | |
| 746 return -2; | |
| 747 } | |
| 748 if (!WindowValid(dpy, win)) | |
| 749 return -1; | |
| 750 | |
| 500 | 751 length = STRLEN(p_enc) + STRLEN(str) + 14; |
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752 if ((property = alloc(length + 30)) != NULL) |
| 7 | 753 { |
| 39 | 754 sprintf((char *)property, "%cn%c-E %s%c-n %s%c-w %x", |
| 755 0, 0, p_enc, 0, str, 0, (unsigned int)commWindow); | |
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756 // Add length of what "%x" resulted in. |
| 7 | 757 length += STRLEN(property + length); |
| 758 res = AppendPropCarefully(dpy, win, commProperty, property, length + 1); | |
| 759 vim_free(property); | |
| 760 return res; | |
| 761 } | |
| 762 return -1; | |
| 763 } | |
| 764 | |
| 765 static int | |
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766 WaitForReply(void *p) |
| 7 | 767 { |
| 768 Window *w = (Window *) p; | |
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769 |
| 7 | 770 return ServerReplyFind(*w, SROP_Find) != NULL; |
| 771 } | |
| 772 | |
| 773 /* | |
| 774 * Wait for replies from id (win) | |
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775 * When "timeout" is non-zero wait up to this many seconds. |
| 7 | 776 * Return 0 and the malloc'ed string when a reply is available. |
| 777 * Return -1 if the window becomes invalid while waiting. | |
| 778 */ | |
| 779 int | |
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780 serverReadReply( |
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781 Display *dpy, |
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782 Window win, |
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783 char_u **str, |
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784 int localLoop, |
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785 int timeout) |
| 7 | 786 { |
| 787 int len; | |
| 788 char_u *s; | |
| 789 struct ServerReply *p; | |
| 790 | |
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791 ServerWait(dpy, win, WaitForReply, &win, localLoop, |
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792 timeout > 0 ? timeout : -1); |
| 7 | 793 |
| 794 if ((p = ServerReplyFind(win, SROP_Find)) != NULL && p->strings.ga_len > 0) | |
| 795 { | |
| 796 *str = vim_strsave(p->strings.ga_data); | |
| 797 len = STRLEN(*str) + 1; | |
| 798 if (len < p->strings.ga_len) | |
| 799 { | |
| 800 s = (char_u *) p->strings.ga_data; | |
| 801 mch_memmove(s, s + len, p->strings.ga_len - len); | |
| 802 p->strings.ga_len -= len; | |
| 803 } | |
| 804 else | |
| 805 { | |
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806 // Last string read. Remove from list |
| 7 | 807 ga_clear(&p->strings); |
| 808 ServerReplyFind(win, SROP_Delete); | |
| 809 } | |
| 810 return 0; | |
| 811 } | |
| 812 return -1; | |
| 813 } | |
| 814 | |
| 815 /* | |
| 816 * Check for replies from id (win). | |
| 817 * Return TRUE and a non-malloc'ed string if there is. Else return FALSE. | |
| 818 */ | |
| 819 int | |
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820 serverPeekReply(Display *dpy, Window win, char_u **str) |
| 7 | 821 { |
| 822 struct ServerReply *p; | |
| 823 | |
| 824 if ((p = ServerReplyFind(win, SROP_Find)) != NULL && p->strings.ga_len > 0) | |
| 825 { | |
| 826 if (str != NULL) | |
| 827 *str = p->strings.ga_data; | |
| 828 return 1; | |
| 829 } | |
| 830 if (!WindowValid(dpy, win)) | |
| 831 return -1; | |
| 832 return 0; | |
| 833 } | |
| 834 | |
| 835 | |
| 836 /* | |
| 837 * Initialize the communication channels for sending commands and receiving | |
| 838 * results. | |
| 839 */ | |
| 840 static int | |
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841 SendInit(Display *dpy) |
| 7 | 842 { |
| 843 XErrorHandler old_handler; | |
| 844 | |
| 845 /* | |
| 846 * Create the window used for communication, and set up an | |
| 847 * event handler for it. | |
| 848 */ | |
| 849 old_handler = XSetErrorHandler(x_error_check); | |
| 850 got_x_error = FALSE; | |
| 851 | |
| 852 if (commProperty == None) | |
| 853 commProperty = XInternAtom(dpy, "Comm", False); | |
| 854 if (vimProperty == None) | |
| 855 vimProperty = XInternAtom(dpy, "Vim", False); | |
| 856 if (registryProperty == None) | |
| 857 registryProperty = XInternAtom(dpy, "VimRegistry", False); | |
| 858 | |
| 859 if (commWindow == None) | |
| 860 { | |
| 861 commWindow = XCreateSimpleWindow(dpy, XDefaultRootWindow(dpy), | |
| 862 getpid(), 0, 10, 10, 0, | |
| 863 WhitePixel(dpy, DefaultScreen(dpy)), | |
| 864 WhitePixel(dpy, DefaultScreen(dpy))); | |
| 865 XSelectInput(dpy, commWindow, PropertyChangeMask); | |
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866 // WARNING: Do not step through this while debugging, it will hangup |
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867 // the X server! |
| 7 | 868 XGrabServer(dpy); |
| 869 DeleteAnyLingerer(dpy, commWindow); | |
| 870 XUngrabServer(dpy); | |
| 871 } | |
| 872 | |
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873 // Make window recognizable as a vim window |
| 7 | 874 XChangeProperty(dpy, commWindow, vimProperty, XA_STRING, |
| 875 8, PropModeReplace, (char_u *)VIM_VERSION_SHORT, | |
| 876 (int)STRLEN(VIM_VERSION_SHORT) + 1); | |
| 877 | |
| 878 XSync(dpy, False); | |
| 879 (void)XSetErrorHandler(old_handler); | |
| 880 | |
| 881 return got_x_error ? -1 : 0; | |
| 882 } | |
| 883 | |
| 884 /* | |
| 885 * Given a server name, see if the name exists in the registry for a | |
| 886 * particular display. | |
| 887 * | |
| 888 * If the given name is registered, return the ID of the window associated | |
| 889 * with the name. If the name isn't registered, then return 0. | |
| 890 * | |
| 891 * Side effects: | |
| 892 * If the registry property is improperly formed, then it is deleted. | |
| 893 * If "delete" is non-zero, then if the named server is found it is | |
| 894 * removed from the registry property. | |
| 895 */ | |
| 896 static Window | |
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897 LookupName( |
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898 Display *dpy, // Display whose registry to check. |
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899 char_u *name, // Name of a server. |
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900 int delete, // If non-zero, delete info about name. |
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901 char_u **loose) // Do another search matching -999 if not found |
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902 // Return result here if a match is found |
| 7 | 903 { |
| 904 char_u *regProp, *entry; | |
| 905 char_u *p; | |
| 906 long_u numItems; | |
| 907 int_u returnValue; | |
| 908 | |
| 909 /* | |
| 910 * Read the registry property. | |
| 911 */ | |
| 912 if (GetRegProp(dpy, ®Prop, &numItems, FALSE) == FAIL) | |
| 913 return 0; | |
| 914 | |
| 915 /* | |
| 916 * Scan the property for the desired name. | |
| 917 */ | |
| 918 returnValue = (int_u)None; | |
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919 entry = NULL; // Not needed, but eliminates compiler warning. |
| 1880 | 920 for (p = regProp; (long_u)(p - regProp) < numItems; ) |
| 7 | 921 { |
| 922 entry = p; | |
| 923 while (*p != 0 && !isspace(*p)) | |
| 924 p++; | |
| 925 if (*p != 0 && STRICMP(name, p + 1) == 0) | |
| 926 { | |
| 927 sscanf((char *)entry, "%x", &returnValue); | |
| 928 break; | |
| 929 } | |
| 930 while (*p != 0) | |
| 931 p++; | |
| 932 p++; | |
| 933 } | |
| 934 | |
| 935 if (loose != NULL && returnValue == (int_u)None && !IsSerialName(name)) | |
| 936 { | |
| 1880 | 937 for (p = regProp; (long_u)(p - regProp) < numItems; ) |
| 7 | 938 { |
| 939 entry = p; | |
| 940 while (*p != 0 && !isspace(*p)) | |
| 941 p++; | |
| 942 if (*p != 0 && IsSerialName(p + 1) | |
| 943 && STRNICMP(name, p + 1, STRLEN(name)) == 0) | |
| 944 { | |
| 945 sscanf((char *)entry, "%x", &returnValue); | |
| 946 *loose = vim_strsave(p + 1); | |
| 947 break; | |
| 948 } | |
| 949 while (*p != 0) | |
| 950 p++; | |
| 951 p++; | |
| 952 } | |
| 953 } | |
| 954 | |
| 955 /* | |
| 956 * Delete the property, if that is desired (copy down the | |
| 957 * remainder of the registry property to overlay the deleted | |
| 958 * info, then rewrite the property). | |
| 959 */ | |
| 960 if (delete && returnValue != (int_u)None) | |
| 961 { | |
| 962 int count; | |
| 963 | |
| 964 while (*p != 0) | |
| 965 p++; | |
| 966 p++; | |
| 967 count = numItems - (p - regProp); | |
| 968 if (count > 0) | |
| 1740 | 969 mch_memmove(entry, p, count); |
| 7 | 970 XChangeProperty(dpy, RootWindow(dpy, 0), registryProperty, XA_STRING, |
| 971 8, PropModeReplace, regProp, | |
| 972 (int)(numItems - (p - entry))); | |
| 973 XSync(dpy, False); | |
| 974 } | |
| 975 | |
| 976 if (regProp != empty_prop) | |
| 977 XFree(regProp); | |
| 978 return (Window)returnValue; | |
| 979 } | |
| 980 | |
| 981 /* | |
| 1197 | 982 * Delete any lingering occurrence of window id. We promise that any |
| 983 * occurrence is not ours since it is not yet put into the registry (by us) | |
| 7 | 984 * |
| 985 * This is necessary in the following scenario: | |
| 986 * 1. There is an old windowid for an exit'ed vim in the registry | |
| 987 * 2. We get that id for our commWindow but only want to send, not register. | |
| 988 * 3. The window will mistakenly be regarded valid because of own commWindow | |
| 989 */ | |
| 990 static void | |
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991 DeleteAnyLingerer( |
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992 Display *dpy, // Display whose registry to check. |
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993 Window win) // Window to remove |
| 7 | 994 { |
| 995 char_u *regProp, *entry = NULL; | |
| 996 char_u *p; | |
| 997 long_u numItems; | |
| 28 | 998 int_u wwin; |
| 7 | 999 |
| 1000 /* | |
| 1001 * Read the registry property. | |
| 1002 */ | |
| 1003 if (GetRegProp(dpy, ®Prop, &numItems, FALSE) == FAIL) | |
| 1004 return; | |
| 1005 | |
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1006 // Scan the property for the window id. |
| 1880 | 1007 for (p = regProp; (long_u)(p - regProp) < numItems; ) |
| 7 | 1008 { |
| 1009 if (*p != 0) | |
| 1010 { | |
| 28 | 1011 sscanf((char *)p, "%x", &wwin); |
| 1012 if ((Window)wwin == win) | |
| 7 | 1013 { |
| 1014 int lastHalf; | |
| 1015 | |
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1016 // Copy down the remainder to delete entry |
| 7 | 1017 entry = p; |
| 1018 while (*p != 0) | |
| 1019 p++; | |
| 1020 p++; | |
| 1021 lastHalf = numItems - (p - regProp); | |
| 1022 if (lastHalf > 0) | |
| 1740 | 1023 mch_memmove(entry, p, lastHalf); |
| 7 | 1024 numItems = (entry - regProp) + lastHalf; |
| 1025 p = entry; | |
| 1026 continue; | |
| 1027 } | |
| 1028 } | |
| 1029 while (*p != 0) | |
| 1030 p++; | |
| 1031 p++; | |
| 1032 } | |
| 1033 | |
| 1034 if (entry != NULL) | |
| 1035 { | |
| 1036 XChangeProperty(dpy, RootWindow(dpy, 0), registryProperty, | |
| 1037 XA_STRING, 8, PropModeReplace, regProp, | |
| 1038 (int)(p - regProp)); | |
| 1039 XSync(dpy, False); | |
| 1040 } | |
| 1041 | |
| 1042 if (regProp != empty_prop) | |
| 1043 XFree(regProp); | |
| 1044 } | |
| 1045 | |
| 1046 /* | |
| 1047 * Read the registry property. Delete it when it's formatted wrong. | |
| 1048 * Return the property in "regPropp". "empty_prop" is used when it doesn't | |
| 1049 * exist yet. | |
| 1050 * Return OK when successful. | |
| 1051 */ | |
| 1052 static int | |
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1053 GetRegProp( |
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1054 Display *dpy, |
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1055 char_u **regPropp, |
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1056 long_u *numItemsp, |
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1057 int domsg) // When TRUE give error message. |
| 7 | 1058 { |
| 1059 int result, actualFormat; | |
| 1060 long_u bytesAfter; | |
| 1061 Atom actualType; | |
| 819 | 1062 XErrorHandler old_handler; |
| 7 | 1063 |
| 1064 *regPropp = NULL; | |
| 819 | 1065 old_handler = XSetErrorHandler(x_error_check); |
| 1066 got_x_error = FALSE; | |
| 1067 | |
| 7 | 1068 result = XGetWindowProperty(dpy, RootWindow(dpy, 0), registryProperty, 0L, |
| 1069 (long)MAX_PROP_WORDS, False, | |
| 1070 XA_STRING, &actualType, | |
| 1071 &actualFormat, numItemsp, &bytesAfter, | |
| 1072 regPropp); | |
| 1073 | |
| 819 | 1074 XSync(dpy, FALSE); |
| 1075 (void)XSetErrorHandler(old_handler); | |
| 1076 if (got_x_error) | |
| 1077 return FAIL; | |
| 1078 | |
| 7 | 1079 if (actualType == None) |
| 1080 { | |
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1081 // No prop yet. Logically equal to the empty list |
| 7 | 1082 *numItemsp = 0; |
| 1083 *regPropp = empty_prop; | |
| 1084 return OK; | |
| 1085 } | |
| 1086 | |
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1087 // If the property is improperly formed, then delete it. |
| 7 | 1088 if (result != Success || actualFormat != 8 || actualType != XA_STRING) |
| 1089 { | |
| 1090 if (*regPropp != NULL) | |
| 1091 XFree(*regPropp); | |
| 1092 XDeleteProperty(dpy, RootWindow(dpy, 0), registryProperty); | |
| 1093 if (domsg) | |
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1094 emsg(_("E251: VIM instance registry property is badly formed. Deleted!")); |
| 7 | 1095 return FAIL; |
| 1096 } | |
| 1097 return OK; | |
| 1098 } | |
| 1099 | |
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1100 |
| 7 | 1101 /* |
| 1197 | 1102 * This procedure is invoked by the various X event loops throughout Vims when |
| 7 | 1103 * a property changes on the communication window. This procedure reads the |
|
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1104 * property and enqueues command requests and responses. If immediate is true, |
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1105 * it runs the event immediately instead of enqueuing it. Immediate can cause |
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1106 * unintended behavior and should only be used for code that blocks for a |
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1107 * response. |
| 7 | 1108 */ |
| 1109 void | |
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1110 serverEventProc( |
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1111 Display *dpy, |
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1112 XEvent *eventPtr, // Information about event. |
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1113 int immediate) // Run event immediately. Should mostly be 0. |
| 7 | 1114 { |
| 1115 char_u *propInfo; | |
|
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1116 int result, actualFormat; |
| 7 | 1117 long_u numItems, bytesAfter; |
| 1118 Atom actualType; | |
| 1119 | |
| 1120 if (eventPtr != NULL) | |
| 1121 { | |
| 1122 if (eventPtr->xproperty.atom != commProperty | |
| 1123 || eventPtr->xproperty.state != PropertyNewValue) | |
| 1124 return; | |
| 1125 } | |
| 1126 | |
| 1127 /* | |
| 1128 * Read the comm property and delete it. | |
| 1129 */ | |
| 1130 propInfo = NULL; | |
| 1131 result = XGetWindowProperty(dpy, commWindow, commProperty, 0L, | |
| 1132 (long)MAX_PROP_WORDS, True, | |
| 1133 XA_STRING, &actualType, | |
| 1134 &actualFormat, &numItems, &bytesAfter, | |
| 1135 &propInfo); | |
| 1136 | |
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1137 // If the property doesn't exist or is improperly formed then ignore it. |
| 7 | 1138 if (result != Success || actualType != XA_STRING || actualFormat != 8) |
| 1139 { | |
| 1140 if (propInfo != NULL) | |
| 1141 XFree(propInfo); | |
| 1142 return; | |
| 1143 } | |
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1144 if (immediate) |
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1145 server_parse_message(dpy, propInfo, numItems); |
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1146 else |
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1147 save_in_queue(propInfo, numItems); |
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1148 } |
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1149 |
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1150 /* |
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1151 * Saves x clientserver commands in a queue so that they can be called when |
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1152 * vim is idle. |
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1153 */ |
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1154 static void |
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1155 save_in_queue(char_u *propInfo, long_u len) |
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1156 { |
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1157 x_queue_T *node; |
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1158 |
|
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|
1159 node = ALLOC_ONE(x_queue_T); |
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1160 if (node == NULL) |
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1161 return; // out of memory |
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1162 node->propInfo = propInfo; |
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1163 node->len = len; |
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1164 |
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1165 if (head.next == NULL) // initialize circular queue |
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1166 { |
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1167 head.next = &head; |
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1168 head.prev = &head; |
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1169 } |
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1170 |
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1171 // insert node at tail of queue |
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1172 node->next = &head; |
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1173 node->prev = head.prev; |
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1174 head.prev->next = node; |
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1175 head.prev = node; |
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1176 } |
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1177 |
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1178 /* |
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1179 * Parses queued clientserver messages. |
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1180 */ |
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1181 void |
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1182 server_parse_messages(void) |
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1183 { |
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1184 x_queue_T *node; |
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1185 |
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1186 if (!X_DISPLAY) |
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1187 return; // cannot happen? |
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1188 while (head.next != NULL && head.next != &head) |
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1189 { |
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1190 node = head.next; |
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1191 head.next = node->next; |
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1192 node->next->prev = node->prev; |
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1193 server_parse_message(X_DISPLAY, node->propInfo, node->len); |
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1194 vim_free(node); |
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1195 } |
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1196 } |
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1197 |
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1198 /* |
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1199 * Returns a non-zero value if there are clientserver messages waiting |
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1200 * int the queue. |
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1201 */ |
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1202 int |
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1203 server_waiting(void) |
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1204 { |
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1205 return head.next != NULL && head.next != &head; |
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1206 } |
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1207 |
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1208 /* |
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1209 * Prases a single clientserver message. A single message may contain multiple |
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1210 * commands. |
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1211 * "propInfo" will be freed. |
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1212 */ |
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1213 static void |
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1214 server_parse_message( |
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1215 Display *dpy, |
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1216 char_u *propInfo, // A string containing 0 or more X commands |
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1217 long_u numItems) // The size of propInfo in bytes. |
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1218 { |
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1219 char_u *p; |
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1220 int code; |
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1221 char_u *tofree; |
| 7 | 1222 |
| 1223 /* | |
| 1224 * Several commands and results could arrive in the property at | |
| 1225 * one time; each iteration through the outer loop handles a | |
| 1226 * single command or result. | |
| 1227 */ | |
| 1880 | 1228 for (p = propInfo; (long_u)(p - propInfo) < numItems; ) |
| 7 | 1229 { |
| 1230 /* | |
| 1231 * Ignore leading NULs; each command or result starts with a | |
| 1232 * NUL so that no matter how badly formed a preceding command | |
| 1233 * is, we'll be able to tell that a new command/result is | |
| 1234 * starting. | |
| 1235 */ | |
| 1236 if (*p == 0) | |
| 1237 { | |
| 1238 p++; | |
| 1239 continue; | |
| 1240 } | |
| 1241 | |
| 1242 if ((*p == 'c' || *p == 'k') && (p[1] == 0)) | |
| 1243 { | |
| 1244 Window resWindow; | |
| 3668 | 1245 char_u *name, *script, *serial, *end; |
| 7 | 1246 Bool asKeys = *p == 'k'; |
| 39 | 1247 char_u *enc; |
| 7 | 1248 |
| 1249 /* | |
| 1250 * This is an incoming command from some other application. | |
| 1251 * Iterate over all of its options. Stop when we reach | |
| 1252 * the end of the property or something that doesn't look | |
| 1253 * like an option. | |
| 1254 */ | |
| 1255 p += 2; | |
| 1256 name = NULL; | |
| 1257 resWindow = None; | |
| 1258 serial = (char_u *)""; | |
| 1259 script = NULL; | |
| 39 | 1260 enc = NULL; |
| 1880 | 1261 while ((long_u)(p - propInfo) < numItems && *p == '-') |
| 7 | 1262 { |
| 1263 switch (p[1]) | |
| 1264 { | |
| 1265 case 'r': | |
| 1266 end = skipwhite(p + 2); | |
| 1267 resWindow = 0; | |
| 1268 while (vim_isxdigit(*end)) | |
| 1269 { | |
| 1270 resWindow = 16 * resWindow + (long_u)hex2nr(*end); | |
| 1271 ++end; | |
| 1272 } | |
| 1273 if (end == p + 2 || *end != ' ') | |
| 1274 resWindow = None; | |
| 1275 else | |
| 1276 { | |
| 1277 p = serial = end + 1; | |
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1278 clientWindow = resWindow; // Remember in global |
| 7 | 1279 } |
| 1280 break; | |
| 1281 case 'n': | |
| 1282 if (p[2] == ' ') | |
| 1283 name = p + 3; | |
| 1284 break; | |
| 1285 case 's': | |
| 1286 if (p[2] == ' ') | |
| 1287 script = p + 3; | |
| 1288 break; | |
| 39 | 1289 case 'E': |
| 1290 if (p[2] == ' ') | |
| 1291 enc = p + 3; | |
| 1292 break; | |
| 7 | 1293 } |
| 1294 while (*p != 0) | |
| 1295 p++; | |
| 1296 p++; | |
| 1297 } | |
| 1298 | |
| 1299 if (script == NULL || name == NULL) | |
| 1300 continue; | |
| 1301 | |
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1302 if (serverName != NULL && STRICMP(name, serverName) == 0) |
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1303 { |
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1304 script = serverConvert(enc, script, &tofree); |
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1305 if (asKeys) |
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1306 server_to_input_buf(script); |
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1307 else |
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1308 { |
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1309 char_u *res; |
| 3668 | 1310 |
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1311 res = eval_client_expr_to_string(script); |
| 3668 | 1312 if (resWindow != None) |
| 1313 { | |
| 1314 garray_T reply; | |
| 1315 | |
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1316 // Initialize the result property. |
| 3668 | 1317 ga_init2(&reply, 1, 100); |
| 7009 | 1318 (void)ga_grow(&reply, 50 + STRLEN(p_enc)); |
| 3668 | 1319 sprintf(reply.ga_data, "%cr%c-E %s%c-s %s%c-r ", |
| 39 | 1320 0, 0, p_enc, 0, serial, 0); |
| 3668 | 1321 reply.ga_len = 14 + STRLEN(p_enc) + STRLEN(serial); |
| 1322 | |
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1323 // Evaluate the expression and return the result. |
| 3668 | 1324 if (res != NULL) |
| 1325 ga_concat(&reply, res); | |
| 1326 else | |
| 1327 { | |
| 1328 ga_concat(&reply, (char_u *)_(e_invexprmsg)); | |
| 1329 ga_append(&reply, 0); | |
| 1330 ga_concat(&reply, (char_u *)"-c 1"); | |
| 1331 } | |
| 1332 ga_append(&reply, NUL); | |
| 1333 (void)AppendPropCarefully(dpy, resWindow, commProperty, | |
| 1334 reply.ga_data, reply.ga_len); | |
| 1335 ga_clear(&reply); | |
| 1336 } | |
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1337 vim_free(res); |
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1338 } |
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1339 vim_free(tofree); |
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1340 } |
| 7 | 1341 } |
| 1342 else if (*p == 'r' && p[1] == 0) | |
| 1343 { | |
| 39 | 1344 int serial, gotSerial; |
| 1345 char_u *res; | |
| 1346 PendingCommand *pcPtr; | |
| 1347 char_u *enc; | |
| 7 | 1348 |
| 1349 /* | |
| 1350 * This is a reply to some command that we sent out. Iterate | |
| 1351 * over all of its options. Stop when we reach the end of the | |
| 1352 * property or something that doesn't look like an option. | |
| 1353 */ | |
| 1354 p += 2; | |
| 1355 gotSerial = 0; | |
| 1356 res = (char_u *)""; | |
| 1357 code = 0; | |
| 39 | 1358 enc = NULL; |
| 1880 | 1359 while ((long_u)(p - propInfo) < numItems && *p == '-') |
| 7 | 1360 { |
| 1361 switch (p[1]) | |
| 1362 { | |
| 1363 case 'r': | |
| 1364 if (p[2] == ' ') | |
| 1365 res = p + 3; | |
| 1366 break; | |
| 39 | 1367 case 'E': |
| 1368 if (p[2] == ' ') | |
| 1369 enc = p + 3; | |
| 1370 break; | |
| 7 | 1371 case 's': |
| 1372 if (sscanf((char *)p + 2, " %d", &serial) == 1) | |
| 1373 gotSerial = 1; | |
| 1374 break; | |
| 1375 case 'c': | |
| 1376 if (sscanf((char *)p + 2, " %d", &code) != 1) | |
| 1377 code = 0; | |
| 1378 break; | |
| 1379 } | |
| 1380 while (*p != 0) | |
| 1381 p++; | |
| 1382 p++; | |
| 1383 } | |
| 1384 | |
| 1385 if (!gotSerial) | |
| 1386 continue; | |
| 1387 | |
| 1388 /* | |
| 1389 * Give the result information to anyone who's | |
| 1390 * waiting for it. | |
| 1391 */ | |
| 1392 for (pcPtr = pendingCommands; pcPtr != NULL; pcPtr = pcPtr->nextPtr) | |
| 1393 { | |
| 1394 if (serial != pcPtr->serial || pcPtr->result != NULL) | |
| 1395 continue; | |
| 1396 | |
| 1397 pcPtr->code = code; | |
| 7009 | 1398 res = serverConvert(enc, res, &tofree); |
| 1399 if (tofree == NULL) | |
| 1400 res = vim_strsave(res); | |
| 1401 pcPtr->result = res; | |
| 7 | 1402 break; |
| 1403 } | |
| 1404 } | |
| 1405 else if (*p == 'n' && p[1] == 0) | |
| 1406 { | |
| 1407 Window win = 0; | |
| 1408 unsigned int u; | |
| 1409 int gotWindow; | |
| 1410 char_u *str; | |
| 1411 struct ServerReply *r; | |
| 39 | 1412 char_u *enc; |
| 7 | 1413 |
| 1414 /* | |
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1415 * This is a (n)otification. Sent with serverreply_send in Vim |
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1416 * script. Execute any autocommand and save it for later retrieval |
| 7 | 1417 */ |
| 1418 p += 2; | |
| 1419 gotWindow = 0; | |
| 1420 str = (char_u *)""; | |
| 39 | 1421 enc = NULL; |
| 1880 | 1422 while ((long_u)(p - propInfo) < numItems && *p == '-') |
| 7 | 1423 { |
| 1424 switch (p[1]) | |
| 1425 { | |
| 1426 case 'n': | |
| 1427 if (p[2] == ' ') | |
| 1428 str = p + 3; | |
| 1429 break; | |
| 39 | 1430 case 'E': |
| 1431 if (p[2] == ' ') | |
| 1432 enc = p + 3; | |
| 1433 break; | |
| 7 | 1434 case 'w': |
| 1435 if (sscanf((char *)p + 2, " %x", &u) == 1) | |
| 1436 { | |
| 1437 win = u; | |
| 1438 gotWindow = 1; | |
| 1439 } | |
| 1440 break; | |
| 1441 } | |
| 1442 while (*p != 0) | |
| 1443 p++; | |
| 1444 p++; | |
| 1445 } | |
| 1446 | |
| 1447 if (!gotWindow) | |
| 1448 continue; | |
| 39 | 1449 str = serverConvert(enc, str, &tofree); |
| 7 | 1450 if ((r = ServerReplyFind(win, SROP_Add)) != NULL) |
| 1451 { | |
| 1452 ga_concat(&(r->strings), str); | |
| 21 | 1453 ga_append(&(r->strings), NUL); |
| 7 | 1454 } |
| 1698 | 1455 { |
| 1456 char_u winstr[30]; | |
| 1457 | |
| 1458 sprintf((char *)winstr, "0x%x", (unsigned int)win); | |
| 1459 apply_autocmds(EVENT_REMOTEREPLY, winstr, str, TRUE, curbuf); | |
| 1460 } | |
| 39 | 1461 vim_free(tofree); |
| 7 | 1462 } |
| 1463 else | |
| 1464 { | |
| 1465 /* | |
| 1466 * Didn't recognize this thing. Just skip through the next | |
| 1467 * null character and try again. | |
| 1468 * Even if we get an 'r'(eply) we will throw it away as we | |
| 1469 * never specify (and thus expect) one | |
| 1470 */ | |
| 1471 while (*p != 0) | |
| 1472 p++; | |
| 1473 p++; | |
| 1474 } | |
| 1475 } | |
| 1476 XFree(propInfo); | |
| 1477 } | |
| 1478 | |
| 1479 /* | |
| 1480 * Append a given property to a given window, but set up an X error handler so | |
| 1481 * that if the append fails this procedure can return an error code rather | |
| 1482 * than having Xlib panic. | |
| 1483 * Return: 0 for OK, -1 for error | |
| 1484 */ | |
| 1485 static int | |
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1486 AppendPropCarefully( |
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1487 Display *dpy, // Display on which to operate. |
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1488 Window window, // Window whose property is to be modified. |
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1489 Atom property, // Name of property. |
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1490 char_u *value, // Characters to append to property. |
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1491 int length) // How much to append |
| 7 | 1492 { |
| 1493 XErrorHandler old_handler; | |
| 1494 | |
| 1495 old_handler = XSetErrorHandler(x_error_check); | |
| 1496 got_x_error = FALSE; | |
| 1497 XChangeProperty(dpy, window, property, XA_STRING, 8, | |
| 1498 PropModeAppend, value, length); | |
| 1499 XSync(dpy, False); | |
| 1500 (void) XSetErrorHandler(old_handler); | |
| 1501 return got_x_error ? -1 : 0; | |
| 1502 } | |
| 1503 | |
| 1504 | |
| 1505 /* | |
| 1506 * Another X Error handler, just used to check for errors. | |
| 1507 */ | |
| 1508 static int | |
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1509 x_error_check(Display *dpy UNUSED, XErrorEvent *error_event UNUSED) |
| 7 | 1510 { |
| 1511 got_x_error = TRUE; | |
| 1512 return 0; | |
| 1513 } | |
| 1514 | |
| 1515 /* | |
| 1516 * Check if "str" looks like it had a serial number appended. | |
| 1517 * Actually just checks if the name ends in a digit. | |
| 1518 */ | |
| 1519 static int | |
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1520 IsSerialName(char_u *str) |
| 7 | 1521 { |
| 1522 int len = STRLEN(str); | |
| 1523 | |
| 1524 return (len > 1 && vim_isdigit(str[len - 1])); | |
| 1525 } | |
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1526 #endif // FEAT_CLIENTSERVER |