Mercurial > vim
annotate src/if_xcmdsrv.c @ 35140:9ba95f736abb default tip
Added tag v9.1.0399 for changeset 617f9087f97c05289903b9e88f487ef74d8869fc
| author | Christian Brabandt <cb@256bit.org> |
|---|---|
| date | Wed, 08 May 2024 22:30:04 +0200 |
| parents | 1629cc65d78d |
| children |
| 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); | |
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224 if (res >= 0) |
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225 return OK; |
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226 |
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227 i = 1; |
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228 do |
| 7 | 229 { |
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230 if (res < -1 || i >= 1000) |
| 7 | 231 { |
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232 msg_attr(_("Unable to register a command server name"), |
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233 HL_ATTR(HLF_W)); |
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234 return FAIL; |
| 7 | 235 } |
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236 if (p == NULL) |
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237 p = alloc(STRLEN(name) + 10); |
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238 if (p == NULL) |
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239 { |
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240 res = -10; |
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241 continue; |
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242 } |
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243 sprintf((char *)p, "%s%d", name, i++); |
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244 res = DoRegisterName(dpy, p); |
| 7 | 245 } |
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246 while (res < 0) |
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247 ; |
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248 vim_free(p); |
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249 |
| 7 | 250 return OK; |
| 251 } | |
| 252 | |
| 253 static int | |
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254 DoRegisterName(Display *dpy, char_u *name) |
| 7 | 255 { |
| 256 Window w; | |
| 257 XErrorHandler old_handler; | |
| 258 #define MAX_NAME_LENGTH 100 | |
| 259 char_u propInfo[MAX_NAME_LENGTH + 20]; | |
| 260 | |
| 261 if (commProperty == None) | |
| 262 { | |
| 263 if (SendInit(dpy) < 0) | |
| 264 return -2; | |
| 265 } | |
| 266 | |
| 267 /* | |
| 268 * Make sure the name is unique, and append info about it to | |
| 269 * the registry property. It's important to lock the server | |
| 270 * here to prevent conflicting changes to the registry property. | |
| 271 * WARNING: Do not step through this while debugging, it will hangup the X | |
| 272 * server! | |
| 273 */ | |
| 274 XGrabServer(dpy); | |
| 275 w = LookupName(dpy, name, FALSE, NULL); | |
| 276 if (w != (Window)0) | |
| 277 { | |
| 278 Status status; | |
| 279 int dummyInt; | |
| 280 unsigned int dummyUns; | |
| 281 Window dummyWin; | |
| 282 | |
| 283 /* | |
| 284 * The name is currently registered. See if the commWindow | |
| 285 * associated with the name exists. If not, or if the commWindow | |
| 286 * is *our* commWindow, then just unregister the old name (this | |
| 287 * could happen if an application dies without cleaning up the | |
| 288 * registry). | |
| 289 */ | |
| 290 old_handler = XSetErrorHandler(x_error_check); | |
| 291 status = XGetGeometry(dpy, w, &dummyWin, &dummyInt, &dummyInt, | |
| 292 &dummyUns, &dummyUns, &dummyUns, &dummyUns); | |
| 293 (void)XSetErrorHandler(old_handler); | |
| 294 if (status != Success && w != commWindow) | |
| 295 { | |
| 296 XUngrabServer(dpy); | |
| 297 XFlush(dpy); | |
| 298 return -1; | |
| 299 } | |
| 300 (void)LookupName(dpy, name, /*delete=*/TRUE, NULL); | |
| 301 } | |
| 302 sprintf((char *)propInfo, "%x %.*s", (int_u)commWindow, | |
| 303 MAX_NAME_LENGTH, name); | |
| 304 old_handler = XSetErrorHandler(x_error_check); | |
| 305 got_x_error = FALSE; | |
| 306 XChangeProperty(dpy, RootWindow(dpy, 0), registryProperty, XA_STRING, 8, | |
| 307 PropModeAppend, propInfo, STRLEN(propInfo) + 1); | |
| 308 XUngrabServer(dpy); | |
| 309 XSync(dpy, False); | |
| 310 (void)XSetErrorHandler(old_handler); | |
| 311 | |
| 312 if (!got_x_error) | |
| 313 { | |
| 314 #ifdef FEAT_EVAL | |
| 315 set_vim_var_string(VV_SEND_SERVER, name, -1); | |
| 316 #endif | |
| 317 serverName = vim_strsave(name); | |
| 318 need_maketitle = TRUE; | |
| 319 return 0; | |
| 320 } | |
| 321 return -2; | |
| 322 } | |
| 323 | |
| 324 #if defined(FEAT_GUI) || defined(PROTO) | |
| 325 /* | |
| 326 * Clean out new ID from registry and set it as comm win. | |
| 327 * Change any registered window ID. | |
| 328 */ | |
| 329 void | |
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330 serverChangeRegisteredWindow( |
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331 Display *dpy, // Display to register with |
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332 Window newwin) // Re-register to this ID |
| 7 | 333 { |
| 334 char_u propInfo[MAX_NAME_LENGTH + 20]; | |
| 335 | |
| 336 commWindow = newwin; | |
| 337 | |
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338 // Always call SendInit() here, to make sure commWindow is marked as a Vim |
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339 // window. |
| 7 | 340 if (SendInit(dpy) < 0) |
| 341 return; | |
| 342 | |
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343 // WARNING: Do not step through this while debugging, it will hangup the X |
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344 // server! |
| 7 | 345 XGrabServer(dpy); |
| 346 DeleteAnyLingerer(dpy, newwin); | |
| 347 if (serverName != NULL) | |
| 348 { | |
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349 // Reinsert name if it was already registered |
| 7 | 350 (void)LookupName(dpy, serverName, /*delete=*/TRUE, NULL); |
| 351 sprintf((char *)propInfo, "%x %.*s", | |
| 352 (int_u)newwin, MAX_NAME_LENGTH, serverName); | |
| 353 XChangeProperty(dpy, RootWindow(dpy, 0), registryProperty, XA_STRING, 8, | |
| 354 PropModeAppend, (char_u *)propInfo, | |
| 355 STRLEN(propInfo) + 1); | |
| 356 } | |
| 357 XUngrabServer(dpy); | |
| 358 } | |
| 359 #endif | |
| 360 | |
| 361 /* | |
| 362 * Send to an instance of Vim via the X display. | |
| 363 * Returns 0 for OK, negative for an error. | |
| 364 */ | |
| 365 int | |
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366 serverSendToVim( |
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367 Display *dpy, // Where to send. |
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368 char_u *name, // Where to send. |
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369 char_u *cmd, // What to send. |
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370 char_u **result, // Result of eval'ed expression |
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371 Window *server, // Actual ID of receiving app |
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372 Bool asExpr, // Interpret as keystrokes or expr ? |
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373 int timeout, // seconds to wait or zero |
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374 Bool localLoop, // Throw away everything but result |
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375 int silent) // don't complain about no server |
| 7 | 376 { |
| 377 Window w; | |
| 378 char_u *property; | |
| 379 int length; | |
| 380 int res; | |
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381 static int serial = 0; // Running count of sent commands. |
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382 // Used to give each command a |
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383 // different serial number. |
| 7 | 384 PendingCommand pending; |
| 385 char_u *loosename = NULL; | |
| 386 | |
| 387 if (result != NULL) | |
| 388 *result = NULL; | |
| 389 if (name == NULL || *name == NUL) | |
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390 name = (char_u *)"GVIM"; // use a default name |
| 7 | 391 |
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392 if (commProperty == None && dpy != NULL && SendInit(dpy) < 0) |
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393 return -1; |
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394 |
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395 #if defined(FEAT_EVAL) |
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396 ch_log(NULL, "serverSendToVim(%s, %s)", name, cmd); |
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397 #endif |
| 7 | 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_no_registered_server_named_str), 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(_(e_failed_to_send_command_to_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 } | |
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499 |
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500 #if defined(FEAT_EVAL) |
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501 ch_log(NULL, "serverSendToVim() result: %s", |
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502 pending.result == NULL ? "NULL" : (char *)pending.result); |
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503 #endif |
| 7 | 504 if (result != NULL) |
| 505 *result = pending.result; | |
| 506 else | |
| 507 vim_free(pending.result); | |
| 508 | |
| 509 return pending.code == 0 ? 0 : -1; | |
| 510 } | |
| 511 | |
| 512 static int | |
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513 WaitForPend(void *p) |
| 7 | 514 { |
| 515 PendingCommand *pending = (PendingCommand *) p; | |
| 516 return pending->result != NULL; | |
| 517 } | |
| 518 | |
| 519 /* | |
| 520 * Return TRUE if window "w" exists and has a "Vim" property on it. | |
| 521 */ | |
| 522 static int | |
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523 WindowValid(Display *dpy, Window w) |
| 7 | 524 { |
| 525 XErrorHandler old_handler; | |
| 526 Atom *plist; | |
| 527 int numProp; | |
| 528 int i; | |
| 529 | |
| 530 old_handler = XSetErrorHandler(x_error_check); | |
| 531 got_x_error = 0; | |
| 532 plist = XListProperties(dpy, w, &numProp); | |
| 533 XSync(dpy, False); | |
| 534 XSetErrorHandler(old_handler); | |
| 535 if (plist == NULL || got_x_error) | |
| 536 return FALSE; | |
| 537 | |
| 538 for (i = 0; i < numProp; i++) | |
| 539 if (plist[i] == vimProperty) | |
| 540 { | |
| 541 XFree(plist); | |
| 542 return TRUE; | |
| 543 } | |
| 544 XFree(plist); | |
| 545 return FALSE; | |
| 546 } | |
| 547 | |
| 548 /* | |
| 549 * Enter a loop processing X events & polling chars until we see a result | |
| 550 */ | |
| 551 static void | |
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552 ServerWait( |
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553 Display *dpy, |
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554 Window w, |
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555 EndCond endCond, |
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556 void *endData, |
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557 int localLoop, |
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558 int seconds) |
| 7 | 559 { |
| 560 time_t start; | |
| 561 time_t now; | |
| 562 XEvent event; | |
| 3670 | 563 |
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564 #define UI_MSEC_DELAY 53 |
| 3670 | 565 #define SEND_MSEC_POLL 500 |
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566 #ifdef HAVE_SELECT |
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567 fd_set fds; |
|
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568 |
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569 FD_ZERO(&fds); |
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570 FD_SET(ConnectionNumber(dpy), &fds); |
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571 #else |
| 3670 | 572 struct pollfd fds; |
| 573 | |
| 574 fds.fd = ConnectionNumber(dpy); | |
| 575 fds.events = POLLIN; | |
| 576 #endif | |
| 7 | 577 |
| 578 time(&start); | |
| 3670 | 579 while (TRUE) |
| 7 | 580 { |
| 3670 | 581 while (XCheckWindowEvent(dpy, commWindow, PropertyChangeMask, &event)) |
|
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582 serverEventProc(dpy, &event, 1); |
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583 server_parse_messages(); |
| 3670 | 584 |
| 585 if (endCond(endData) != 0) | |
| 586 break; | |
| 587 if (!WindowValid(dpy, w)) | |
| 588 break; | |
| 7 | 589 time(&now); |
| 590 if (seconds >= 0 && (now - start) >= seconds) | |
| 591 break; | |
| 3670 | 592 |
|
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593 #ifdef FEAT_TIMERS |
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594 check_due_timer(); |
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595 #endif |
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596 |
|
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597 // Just look out for the answer without calling back into Vim |
| 7 | 598 if (localLoop) |
| 599 { | |
|
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600 #ifdef HAVE_SELECT |
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601 struct timeval tv; |
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602 |
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603 // Set the time every call, select() may change it to the remaining |
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604 // time. |
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605 tv.tv_sec = 0; |
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606 tv.tv_usec = SEND_MSEC_POLL * 1000; |
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607 if (select(FD_SETSIZE, &fds, NULL, NULL, &tv) < 0) |
| 7 | 608 break; |
| 609 #else | |
|
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610 if (poll(&fds, 1, SEND_MSEC_POLL) < 0) |
| 7 | 611 break; |
| 612 #endif | |
| 613 } | |
| 614 else | |
| 615 { | |
| 616 if (got_int) | |
| 617 break; | |
| 3670 | 618 ui_delay((long)UI_MSEC_DELAY, TRUE); |
| 7 | 619 ui_breakcheck(); |
| 620 } | |
| 621 } | |
| 622 } | |
| 623 | |
| 624 | |
| 625 /* | |
| 626 * Fetch a list of all the Vim instance names currently registered for the | |
| 627 * display. | |
| 628 * | |
| 629 * Returns a newline separated list in allocated memory or NULL. | |
| 630 */ | |
| 631 char_u * | |
|
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632 serverGetVimNames(Display *dpy) |
| 7 | 633 { |
| 634 char_u *regProp; | |
| 635 char_u *entry; | |
| 636 char_u *p; | |
| 637 long_u numItems; | |
| 638 int_u w; | |
| 639 garray_T ga; | |
| 640 | |
| 641 if (registryProperty == None) | |
| 642 { | |
| 643 if (SendInit(dpy) < 0) | |
| 644 return NULL; | |
| 645 } | |
| 646 | |
| 647 /* | |
| 648 * Read the registry property. | |
| 649 */ | |
| 650 if (GetRegProp(dpy, ®Prop, &numItems, TRUE) == FAIL) | |
| 651 return NULL; | |
| 652 | |
| 653 /* | |
| 654 * Scan all of the names out of the property. | |
| 655 */ | |
| 656 ga_init2(&ga, 1, 100); | |
| 1880 | 657 for (p = regProp; (long_u)(p - regProp) < numItems; p++) |
| 7 | 658 { |
| 659 entry = p; | |
|
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660 while (*p != 0 && !SAFE_isspace(*p)) |
| 7 | 661 p++; |
| 662 if (*p != 0) | |
| 663 { | |
| 664 w = None; | |
| 665 sscanf((char *)entry, "%x", &w); | |
| 666 if (WindowValid(dpy, (Window)w)) | |
| 667 { | |
| 668 ga_concat(&ga, p + 1); | |
| 669 ga_concat(&ga, (char_u *)"\n"); | |
| 670 } | |
| 671 while (*p != 0) | |
| 672 p++; | |
| 673 } | |
| 674 } | |
| 675 if (regProp != empty_prop) | |
| 676 XFree(regProp); | |
| 21 | 677 ga_append(&ga, NUL); |
| 7 | 678 return ga.ga_data; |
| 679 } | |
| 680 | |
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681 ///////////////////////////////////////////////////////////// |
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682 // Reply stuff |
| 7 | 683 |
| 684 static struct ServerReply * | |
|
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685 ServerReplyFind(Window w, enum ServerReplyOp op) |
| 7 | 686 { |
| 687 struct ServerReply *p; | |
| 688 struct ServerReply e; | |
| 689 int i; | |
| 690 | |
| 691 p = (struct ServerReply *) serverReply.ga_data; | |
| 692 for (i = 0; i < serverReply.ga_len; i++, p++) | |
| 693 if (p->id == w) | |
| 694 break; | |
| 695 if (i >= serverReply.ga_len) | |
| 696 p = NULL; | |
| 697 | |
| 698 if (p == NULL && op == SROP_Add) | |
| 699 { | |
| 700 if (serverReply.ga_growsize == 0) | |
| 701 ga_init2(&serverReply, sizeof(struct ServerReply), 1); | |
| 702 if (ga_grow(&serverReply, 1) == OK) | |
| 703 { | |
| 704 p = ((struct ServerReply *) serverReply.ga_data) | |
| 705 + serverReply.ga_len; | |
| 706 e.id = w; | |
| 707 ga_init2(&e.strings, 1, 100); | |
| 1740 | 708 mch_memmove(p, &e, sizeof(e)); |
| 7 | 709 serverReply.ga_len++; |
| 710 } | |
| 711 } | |
| 712 else if (p != NULL && op == SROP_Delete) | |
| 713 { | |
| 714 ga_clear(&p->strings); | |
| 715 mch_memmove(p, p + 1, (serverReply.ga_len - i - 1) * sizeof(*p)); | |
| 716 serverReply.ga_len--; | |
| 717 } | |
| 718 | |
| 719 return p; | |
| 720 } | |
| 721 | |
| 722 /* | |
| 723 * Convert string to windowid. | |
| 724 * Issue an error if the id is invalid. | |
| 725 */ | |
| 726 Window | |
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727 serverStrToWin(char_u *str) |
| 7 | 728 { |
| 729 unsigned id = None; | |
| 730 | |
| 731 sscanf((char *)str, "0x%x", &id); | |
| 732 if (id == None) | |
|
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733 semsg(_(e_invalid_server_id_used_str), str); |
| 7 | 734 |
| 735 return (Window)id; | |
| 736 } | |
| 737 | |
| 738 /* | |
| 39 | 739 * Send a reply string (notification) to client with id "name". |
| 7 | 740 * Return -1 if the window is invalid. |
| 741 */ | |
| 742 int | |
|
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743 serverSendReply(char_u *name, char_u *str) |
| 7 | 744 { |
| 745 char_u *property; | |
| 746 int length; | |
| 747 int res; | |
| 748 Display *dpy = X_DISPLAY; | |
| 749 Window win = serverStrToWin(name); | |
| 750 | |
| 751 if (commProperty == None) | |
| 752 { | |
| 753 if (SendInit(dpy) < 0) | |
| 754 return -2; | |
| 755 } | |
| 756 if (!WindowValid(dpy, win)) | |
| 757 return -1; | |
| 758 | |
| 500 | 759 length = STRLEN(p_enc) + STRLEN(str) + 14; |
|
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760 if ((property = alloc(length + 30)) == NULL) |
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761 return -1; |
|
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762 |
|
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|
763 sprintf((char *)property, "%cn%c-E %s%c-n %s%c-w %x", |
|
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|
764 0, 0, p_enc, 0, str, 0, (unsigned int)commWindow); |
|
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parents:
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diff
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|
765 // Add length of what "%x" resulted in. |
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766 length += STRLEN(property + length); |
|
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767 res = AppendPropCarefully(dpy, win, commProperty, property, length + 1); |
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768 vim_free(property); |
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769 |
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770 return res; |
| 7 | 771 } |
| 772 | |
| 773 static int | |
|
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|
774 WaitForReply(void *p) |
| 7 | 775 { |
| 776 Window *w = (Window *) p; | |
|
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|
777 |
| 7 | 778 return ServerReplyFind(*w, SROP_Find) != NULL; |
| 779 } | |
| 780 | |
| 781 /* | |
| 782 * Wait for replies from id (win) | |
|
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783 * When "timeout" is non-zero wait up to this many seconds. |
|
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changeset
|
784 * Return 0 and the allocated string in "*str" when a reply is available. |
| 7 | 785 * Return -1 if the window becomes invalid while waiting. |
| 786 */ | |
| 787 int | |
|
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788 serverReadReply( |
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789 Display *dpy, |
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790 Window win, |
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|
791 char_u **str, |
|
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792 int localLoop, |
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793 int timeout) |
| 7 | 794 { |
| 795 int len; | |
| 796 char_u *s; | |
| 797 struct ServerReply *p; | |
| 798 | |
|
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|
799 ServerWait(dpy, win, WaitForReply, &win, localLoop, |
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800 timeout > 0 ? timeout : -1); |
| 7 | 801 |
| 802 if ((p = ServerReplyFind(win, SROP_Find)) != NULL && p->strings.ga_len > 0) | |
| 803 { | |
| 804 *str = vim_strsave(p->strings.ga_data); | |
| 805 len = STRLEN(*str) + 1; | |
| 806 if (len < p->strings.ga_len) | |
| 807 { | |
| 808 s = (char_u *) p->strings.ga_data; | |
| 809 mch_memmove(s, s + len, p->strings.ga_len - len); | |
| 810 p->strings.ga_len -= len; | |
| 811 } | |
| 812 else | |
| 813 { | |
|
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|
814 // Last string read. Remove from list |
| 7 | 815 ga_clear(&p->strings); |
| 816 ServerReplyFind(win, SROP_Delete); | |
| 817 } | |
| 818 return 0; | |
| 819 } | |
| 820 return -1; | |
| 821 } | |
| 822 | |
| 823 /* | |
| 824 * Check for replies from id (win). | |
| 825 * Return TRUE and a non-malloc'ed string if there is. Else return FALSE. | |
| 826 */ | |
| 827 int | |
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|
828 serverPeekReply(Display *dpy, Window win, char_u **str) |
| 7 | 829 { |
| 830 struct ServerReply *p; | |
| 831 | |
| 832 if ((p = ServerReplyFind(win, SROP_Find)) != NULL && p->strings.ga_len > 0) | |
| 833 { | |
| 834 if (str != NULL) | |
| 835 *str = p->strings.ga_data; | |
| 836 return 1; | |
| 837 } | |
| 838 if (!WindowValid(dpy, win)) | |
| 839 return -1; | |
| 840 return 0; | |
| 841 } | |
| 842 | |
| 843 | |
| 844 /* | |
| 845 * Initialize the communication channels for sending commands and receiving | |
| 846 * results. | |
| 847 */ | |
| 848 static int | |
|
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849 SendInit(Display *dpy) |
| 7 | 850 { |
| 851 XErrorHandler old_handler; | |
| 852 | |
| 853 /* | |
| 854 * Create the window used for communication, and set up an | |
| 855 * event handler for it. | |
| 856 */ | |
| 857 old_handler = XSetErrorHandler(x_error_check); | |
| 858 got_x_error = FALSE; | |
| 859 | |
| 860 if (commProperty == None) | |
| 861 commProperty = XInternAtom(dpy, "Comm", False); | |
| 862 if (vimProperty == None) | |
| 863 vimProperty = XInternAtom(dpy, "Vim", False); | |
| 864 if (registryProperty == None) | |
| 865 registryProperty = XInternAtom(dpy, "VimRegistry", False); | |
| 866 | |
| 867 if (commWindow == None) | |
| 868 { | |
| 869 commWindow = XCreateSimpleWindow(dpy, XDefaultRootWindow(dpy), | |
| 870 getpid(), 0, 10, 10, 0, | |
| 871 WhitePixel(dpy, DefaultScreen(dpy)), | |
| 872 WhitePixel(dpy, DefaultScreen(dpy))); | |
| 873 XSelectInput(dpy, commWindow, PropertyChangeMask); | |
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874 // WARNING: Do not step through this while debugging, it will hangup |
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|
875 // the X server! |
| 7 | 876 XGrabServer(dpy); |
| 877 DeleteAnyLingerer(dpy, commWindow); | |
| 878 XUngrabServer(dpy); | |
| 879 } | |
| 880 | |
|
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|
881 // Make window recognizable as a vim window |
| 7 | 882 XChangeProperty(dpy, commWindow, vimProperty, XA_STRING, |
| 883 8, PropModeReplace, (char_u *)VIM_VERSION_SHORT, | |
| 884 (int)STRLEN(VIM_VERSION_SHORT) + 1); | |
| 885 | |
| 886 XSync(dpy, False); | |
| 887 (void)XSetErrorHandler(old_handler); | |
| 888 | |
| 889 return got_x_error ? -1 : 0; | |
| 890 } | |
| 891 | |
| 892 /* | |
| 893 * Given a server name, see if the name exists in the registry for a | |
| 894 * particular display. | |
| 895 * | |
| 896 * If the given name is registered, return the ID of the window associated | |
| 897 * with the name. If the name isn't registered, then return 0. | |
| 898 * | |
| 899 * Side effects: | |
| 900 * If the registry property is improperly formed, then it is deleted. | |
| 901 * If "delete" is non-zero, then if the named server is found it is | |
| 902 * removed from the registry property. | |
| 903 */ | |
| 904 static Window | |
|
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905 LookupName( |
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906 Display *dpy, // Display whose registry to check. |
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907 char_u *name, // Name of a server. |
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908 int delete, // If non-zero, delete info about name. |
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909 char_u **loose) // Do another search matching -999 if not found |
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910 // Return result here if a match is found |
| 7 | 911 { |
| 912 char_u *regProp, *entry; | |
| 913 char_u *p; | |
| 914 long_u numItems; | |
| 915 int_u returnValue; | |
| 916 | |
| 917 /* | |
| 918 * Read the registry property. | |
| 919 */ | |
| 920 if (GetRegProp(dpy, ®Prop, &numItems, FALSE) == FAIL) | |
| 921 return 0; | |
| 922 | |
| 923 /* | |
| 924 * Scan the property for the desired name. | |
| 925 */ | |
| 926 returnValue = (int_u)None; | |
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927 entry = NULL; // Not needed, but eliminates compiler warning. |
| 1880 | 928 for (p = regProp; (long_u)(p - regProp) < numItems; ) |
| 7 | 929 { |
| 930 entry = p; | |
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931 while (*p != 0 && !SAFE_isspace(*p)) |
| 7 | 932 p++; |
| 933 if (*p != 0 && STRICMP(name, p + 1) == 0) | |
| 934 { | |
| 935 sscanf((char *)entry, "%x", &returnValue); | |
| 936 break; | |
| 937 } | |
| 938 while (*p != 0) | |
| 939 p++; | |
| 940 p++; | |
| 941 } | |
| 942 | |
| 943 if (loose != NULL && returnValue == (int_u)None && !IsSerialName(name)) | |
| 944 { | |
| 1880 | 945 for (p = regProp; (long_u)(p - regProp) < numItems; ) |
| 7 | 946 { |
| 947 entry = p; | |
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948 while (*p != 0 && !SAFE_isspace(*p)) |
| 7 | 949 p++; |
| 950 if (*p != 0 && IsSerialName(p + 1) | |
| 951 && STRNICMP(name, p + 1, STRLEN(name)) == 0) | |
| 952 { | |
| 953 sscanf((char *)entry, "%x", &returnValue); | |
| 954 *loose = vim_strsave(p + 1); | |
| 955 break; | |
| 956 } | |
| 957 while (*p != 0) | |
| 958 p++; | |
| 959 p++; | |
| 960 } | |
| 961 } | |
| 962 | |
| 963 /* | |
| 964 * Delete the property, if that is desired (copy down the | |
| 965 * remainder of the registry property to overlay the deleted | |
| 966 * info, then rewrite the property). | |
| 967 */ | |
| 968 if (delete && returnValue != (int_u)None) | |
| 969 { | |
| 970 int count; | |
| 971 | |
| 972 while (*p != 0) | |
| 973 p++; | |
| 974 p++; | |
| 975 count = numItems - (p - regProp); | |
| 976 if (count > 0) | |
| 1740 | 977 mch_memmove(entry, p, count); |
| 7 | 978 XChangeProperty(dpy, RootWindow(dpy, 0), registryProperty, XA_STRING, |
| 979 8, PropModeReplace, regProp, | |
| 980 (int)(numItems - (p - entry))); | |
| 981 XSync(dpy, False); | |
| 982 } | |
| 983 | |
| 984 if (regProp != empty_prop) | |
| 985 XFree(regProp); | |
| 986 return (Window)returnValue; | |
| 987 } | |
| 988 | |
| 989 /* | |
| 1197 | 990 * Delete any lingering occurrence of window id. We promise that any |
| 991 * occurrence is not ours since it is not yet put into the registry (by us) | |
| 7 | 992 * |
| 993 * This is necessary in the following scenario: | |
| 994 * 1. There is an old windowid for an exit'ed vim in the registry | |
| 995 * 2. We get that id for our commWindow but only want to send, not register. | |
| 996 * 3. The window will mistakenly be regarded valid because of own commWindow | |
| 997 */ | |
| 998 static void | |
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999 DeleteAnyLingerer( |
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1000 Display *dpy, // Display whose registry to check. |
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1001 Window win) // Window to remove |
| 7 | 1002 { |
| 1003 char_u *regProp, *entry = NULL; | |
| 1004 char_u *p; | |
| 1005 long_u numItems; | |
| 28 | 1006 int_u wwin; |
| 7 | 1007 |
| 1008 /* | |
| 1009 * Read the registry property. | |
| 1010 */ | |
| 1011 if (GetRegProp(dpy, ®Prop, &numItems, FALSE) == FAIL) | |
| 1012 return; | |
| 1013 | |
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1014 // Scan the property for the window id. |
| 1880 | 1015 for (p = regProp; (long_u)(p - regProp) < numItems; ) |
| 7 | 1016 { |
| 1017 if (*p != 0) | |
| 1018 { | |
| 28 | 1019 sscanf((char *)p, "%x", &wwin); |
| 1020 if ((Window)wwin == win) | |
| 7 | 1021 { |
| 1022 int lastHalf; | |
| 1023 | |
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1024 // Copy down the remainder to delete entry |
| 7 | 1025 entry = p; |
| 1026 while (*p != 0) | |
| 1027 p++; | |
| 1028 p++; | |
| 1029 lastHalf = numItems - (p - regProp); | |
| 1030 if (lastHalf > 0) | |
| 1740 | 1031 mch_memmove(entry, p, lastHalf); |
| 7 | 1032 numItems = (entry - regProp) + lastHalf; |
| 1033 p = entry; | |
| 1034 continue; | |
| 1035 } | |
| 1036 } | |
| 1037 while (*p != 0) | |
| 1038 p++; | |
| 1039 p++; | |
| 1040 } | |
| 1041 | |
| 1042 if (entry != NULL) | |
| 1043 { | |
| 1044 XChangeProperty(dpy, RootWindow(dpy, 0), registryProperty, | |
| 1045 XA_STRING, 8, PropModeReplace, regProp, | |
| 1046 (int)(p - regProp)); | |
| 1047 XSync(dpy, False); | |
| 1048 } | |
| 1049 | |
| 1050 if (regProp != empty_prop) | |
| 1051 XFree(regProp); | |
| 1052 } | |
| 1053 | |
| 1054 /* | |
| 1055 * Read the registry property. Delete it when it's formatted wrong. | |
| 1056 * Return the property in "regPropp". "empty_prop" is used when it doesn't | |
| 1057 * exist yet. | |
| 1058 * Return OK when successful. | |
| 1059 */ | |
| 1060 static int | |
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1061 GetRegProp( |
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1062 Display *dpy, |
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1063 char_u **regPropp, |
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1064 long_u *numItemsp, |
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1065 int domsg) // When TRUE give error message. |
| 7 | 1066 { |
| 1067 int result, actualFormat; | |
| 1068 long_u bytesAfter; | |
| 1069 Atom actualType; | |
| 819 | 1070 XErrorHandler old_handler; |
| 7 | 1071 |
| 1072 *regPropp = NULL; | |
| 819 | 1073 old_handler = XSetErrorHandler(x_error_check); |
| 1074 got_x_error = FALSE; | |
| 1075 | |
| 7 | 1076 result = XGetWindowProperty(dpy, RootWindow(dpy, 0), registryProperty, 0L, |
| 1077 (long)MAX_PROP_WORDS, False, | |
| 1078 XA_STRING, &actualType, | |
| 1079 &actualFormat, numItemsp, &bytesAfter, | |
| 1080 regPropp); | |
| 1081 | |
| 819 | 1082 XSync(dpy, FALSE); |
| 1083 (void)XSetErrorHandler(old_handler); | |
| 1084 if (got_x_error) | |
| 1085 return FAIL; | |
| 1086 | |
| 7 | 1087 if (actualType == None) |
| 1088 { | |
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1089 // No prop yet. Logically equal to the empty list |
| 7 | 1090 *numItemsp = 0; |
| 1091 *regPropp = empty_prop; | |
| 1092 return OK; | |
| 1093 } | |
| 1094 | |
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1095 // If the property is improperly formed, then delete it. |
| 7 | 1096 if (result != Success || actualFormat != 8 || actualType != XA_STRING) |
| 1097 { | |
| 1098 if (*regPropp != NULL) | |
| 1099 XFree(*regPropp); | |
| 1100 XDeleteProperty(dpy, RootWindow(dpy, 0), registryProperty); | |
| 1101 if (domsg) | |
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1102 emsg(_(e_vim_instance_registry_property_is_badly_formed_deleted)); |
| 7 | 1103 return FAIL; |
| 1104 } | |
| 1105 return OK; | |
| 1106 } | |
| 1107 | |
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1108 |
| 7 | 1109 /* |
| 1197 | 1110 * This procedure is invoked by the various X event loops throughout Vims when |
| 7 | 1111 * a property changes on the communication window. This procedure reads the |
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1112 * property and enqueues command requests and responses. If immediate is true, |
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1113 * it runs the event immediately instead of enqueuing it. Immediate can cause |
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1114 * unintended behavior and should only be used for code that blocks for a |
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1115 * response. |
| 7 | 1116 */ |
| 1117 void | |
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1118 serverEventProc( |
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1119 Display *dpy, |
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1120 XEvent *eventPtr, // Information about event. |
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1121 int immediate) // Run event immediately. Should mostly be 0. |
| 7 | 1122 { |
| 1123 char_u *propInfo; | |
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1124 int result, actualFormat; |
| 7 | 1125 long_u numItems, bytesAfter; |
| 1126 Atom actualType; | |
| 1127 | |
| 1128 if (eventPtr != NULL) | |
| 1129 { | |
| 1130 if (eventPtr->xproperty.atom != commProperty | |
| 1131 || eventPtr->xproperty.state != PropertyNewValue) | |
| 1132 return; | |
| 1133 } | |
| 1134 | |
| 1135 /* | |
| 1136 * Read the comm property and delete it. | |
| 1137 */ | |
| 1138 propInfo = NULL; | |
| 1139 result = XGetWindowProperty(dpy, commWindow, commProperty, 0L, | |
| 1140 (long)MAX_PROP_WORDS, True, | |
| 1141 XA_STRING, &actualType, | |
| 1142 &actualFormat, &numItems, &bytesAfter, | |
| 1143 &propInfo); | |
| 1144 | |
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1145 // If the property doesn't exist or is improperly formed then ignore it. |
| 7 | 1146 if (result != Success || actualType != XA_STRING || actualFormat != 8) |
| 1147 { | |
| 1148 if (propInfo != NULL) | |
| 1149 XFree(propInfo); | |
| 1150 return; | |
| 1151 } | |
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1152 if (immediate) |
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1153 server_parse_message(dpy, propInfo, numItems); |
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1154 else |
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1155 save_in_queue(propInfo, numItems); |
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1156 } |
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1157 |
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1158 /* |
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1159 * Saves x clientserver commands in a queue so that they can be called when |
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1160 * vim is idle. |
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1161 */ |
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1162 static void |
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1163 save_in_queue(char_u *propInfo, long_u len) |
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1164 { |
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1165 x_queue_T *node; |
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1166 |
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1167 node = ALLOC_ONE(x_queue_T); |
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1168 if (node == NULL) |
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1169 return; // out of memory |
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1170 node->propInfo = propInfo; |
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1171 node->len = len; |
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1172 |
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1173 if (head.next == NULL) // initialize circular queue |
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1174 { |
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1175 head.next = &head; |
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1176 head.prev = &head; |
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1177 } |
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1178 |
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1179 // insert node at tail of queue |
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1180 node->next = &head; |
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1181 node->prev = head.prev; |
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1182 head.prev->next = node; |
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1183 head.prev = node; |
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1184 } |
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1185 |
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1186 /* |
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1187 * Parses queued clientserver messages. |
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1188 */ |
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1189 void |
|
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1190 server_parse_messages(void) |
|
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1191 { |
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1192 x_queue_T *node; |
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1193 |
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1194 if (!X_DISPLAY) |
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1195 return; // cannot happen? |
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1196 while (head.next != NULL && head.next != &head) |
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1197 { |
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1198 node = head.next; |
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1199 head.next = node->next; |
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1200 node->next->prev = node->prev; |
|
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1201 server_parse_message(X_DISPLAY, node->propInfo, node->len); |
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1202 vim_free(node); |
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1203 } |
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1204 } |
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1205 |
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1206 /* |
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1207 * Returns a non-zero value if there are clientserver messages waiting |
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1208 * int the queue. |
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1209 */ |
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1210 int |
|
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1211 server_waiting(void) |
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1212 { |
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1213 return head.next != NULL && head.next != &head; |
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1214 } |
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1215 |
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1216 /* |
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1217 * Prases a single clientserver message. A single message may contain multiple |
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1218 * commands. |
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1219 * "propInfo" will be freed. |
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1220 */ |
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1221 static void |
|
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1222 server_parse_message( |
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1223 Display *dpy, |
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1224 char_u *propInfo, // A string containing 0 or more X commands |
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1225 long_u numItems) // The size of propInfo in bytes. |
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1226 { |
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1227 char_u *p; |
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1228 int code; |
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1229 char_u *tofree; |
| 7 | 1230 |
|
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1231 #if defined(FEAT_EVAL) |
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1232 ch_log(NULL, "server_parse_message() numItems: %ld", numItems); |
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1233 #endif |
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1234 |
| 7 | 1235 /* |
| 1236 * Several commands and results could arrive in the property at | |
| 1237 * one time; each iteration through the outer loop handles a | |
| 1238 * single command or result. | |
| 1239 */ | |
| 1880 | 1240 for (p = propInfo; (long_u)(p - propInfo) < numItems; ) |
| 7 | 1241 { |
| 1242 /* | |
| 1243 * Ignore leading NULs; each command or result starts with a | |
| 1244 * NUL so that no matter how badly formed a preceding command | |
| 1245 * is, we'll be able to tell that a new command/result is | |
| 1246 * starting. | |
| 1247 */ | |
| 1248 if (*p == 0) | |
| 1249 { | |
| 1250 p++; | |
| 1251 continue; | |
| 1252 } | |
| 1253 | |
|
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1254 if ((*p == 'c' || *p == 'k') && p[1] == 0) |
| 7 | 1255 { |
| 1256 Window resWindow; | |
| 3668 | 1257 char_u *name, *script, *serial, *end; |
| 7 | 1258 Bool asKeys = *p == 'k'; |
| 39 | 1259 char_u *enc; |
| 7 | 1260 |
| 1261 /* | |
| 1262 * This is an incoming command from some other application. | |
| 1263 * Iterate over all of its options. Stop when we reach | |
| 1264 * the end of the property or something that doesn't look | |
| 1265 * like an option. | |
| 1266 */ | |
| 1267 p += 2; | |
| 1268 name = NULL; | |
| 1269 resWindow = None; | |
| 1270 serial = (char_u *)""; | |
| 1271 script = NULL; | |
| 39 | 1272 enc = NULL; |
| 1880 | 1273 while ((long_u)(p - propInfo) < numItems && *p == '-') |
| 7 | 1274 { |
|
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1275 #if defined(FEAT_EVAL) |
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1276 ch_log(NULL, "server_parse_message() item: %c, %s", p[-2], p); |
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1277 #endif |
| 7 | 1278 switch (p[1]) |
| 1279 { | |
| 1280 case 'r': | |
| 1281 end = skipwhite(p + 2); | |
| 1282 resWindow = 0; | |
| 1283 while (vim_isxdigit(*end)) | |
| 1284 { | |
| 1285 resWindow = 16 * resWindow + (long_u)hex2nr(*end); | |
| 1286 ++end; | |
| 1287 } | |
| 1288 if (end == p + 2 || *end != ' ') | |
| 1289 resWindow = None; | |
| 1290 else | |
| 1291 { | |
| 1292 p = serial = end + 1; | |
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1293 clientWindow = resWindow; // Remember in global |
| 7 | 1294 } |
| 1295 break; | |
| 1296 case 'n': | |
| 1297 if (p[2] == ' ') | |
| 1298 name = p + 3; | |
| 1299 break; | |
| 1300 case 's': | |
| 1301 if (p[2] == ' ') | |
| 1302 script = p + 3; | |
| 1303 break; | |
| 39 | 1304 case 'E': |
| 1305 if (p[2] == ' ') | |
| 1306 enc = p + 3; | |
| 1307 break; | |
| 7 | 1308 } |
| 1309 while (*p != 0) | |
| 1310 p++; | |
| 1311 p++; | |
| 1312 } | |
| 1313 | |
| 1314 if (script == NULL || name == NULL) | |
| 1315 continue; | |
| 1316 | |
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1317 if (serverName != NULL && STRICMP(name, serverName) == 0) |
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1318 { |
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1319 script = serverConvert(enc, script, &tofree); |
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1320 if (asKeys) |
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1321 server_to_input_buf(script); |
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1322 else |
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1323 { |
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1324 char_u *res; |
| 3668 | 1325 |
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1326 res = eval_client_expr_to_string(script); |
| 3668 | 1327 if (resWindow != None) |
| 1328 { | |
| 1329 garray_T reply; | |
| 1330 | |
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1331 // Initialize the result property. |
| 3668 | 1332 ga_init2(&reply, 1, 100); |
| 7009 | 1333 (void)ga_grow(&reply, 50 + STRLEN(p_enc)); |
| 3668 | 1334 sprintf(reply.ga_data, "%cr%c-E %s%c-s %s%c-r ", |
| 39 | 1335 0, 0, p_enc, 0, serial, 0); |
| 3668 | 1336 reply.ga_len = 14 + STRLEN(p_enc) + STRLEN(serial); |
| 1337 | |
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1338 // Evaluate the expression and return the result. |
| 3668 | 1339 if (res != NULL) |
| 1340 ga_concat(&reply, res); | |
| 1341 else | |
| 1342 { | |
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1343 ga_concat(&reply, |
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1344 (char_u *)_(e_invalid_expression_received)); |
| 3668 | 1345 ga_append(&reply, 0); |
| 1346 ga_concat(&reply, (char_u *)"-c 1"); | |
| 1347 } | |
| 1348 ga_append(&reply, NUL); | |
| 1349 (void)AppendPropCarefully(dpy, resWindow, commProperty, | |
| 1350 reply.ga_data, reply.ga_len); | |
| 1351 ga_clear(&reply); | |
| 1352 } | |
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1353 vim_free(res); |
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1354 } |
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1355 vim_free(tofree); |
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1356 } |
| 7 | 1357 } |
| 1358 else if (*p == 'r' && p[1] == 0) | |
| 1359 { | |
| 39 | 1360 int serial, gotSerial; |
| 1361 char_u *res; | |
| 1362 PendingCommand *pcPtr; | |
| 1363 char_u *enc; | |
| 7 | 1364 |
| 1365 /* | |
| 1366 * This is a reply to some command that we sent out. Iterate | |
| 1367 * over all of its options. Stop when we reach the end of the | |
| 1368 * property or something that doesn't look like an option. | |
| 1369 */ | |
| 1370 p += 2; | |
| 1371 gotSerial = 0; | |
| 1372 res = (char_u *)""; | |
| 1373 code = 0; | |
| 39 | 1374 enc = NULL; |
| 1880 | 1375 while ((long_u)(p - propInfo) < numItems && *p == '-') |
| 7 | 1376 { |
| 1377 switch (p[1]) | |
| 1378 { | |
| 1379 case 'r': | |
| 1380 if (p[2] == ' ') | |
| 1381 res = p + 3; | |
| 1382 break; | |
| 39 | 1383 case 'E': |
| 1384 if (p[2] == ' ') | |
| 1385 enc = p + 3; | |
| 1386 break; | |
| 7 | 1387 case 's': |
| 1388 if (sscanf((char *)p + 2, " %d", &serial) == 1) | |
| 1389 gotSerial = 1; | |
| 1390 break; | |
| 1391 case 'c': | |
| 1392 if (sscanf((char *)p + 2, " %d", &code) != 1) | |
| 1393 code = 0; | |
| 1394 break; | |
| 1395 } | |
| 1396 while (*p != 0) | |
| 1397 p++; | |
| 1398 p++; | |
| 1399 } | |
| 1400 | |
| 1401 if (!gotSerial) | |
| 1402 continue; | |
| 1403 | |
| 1404 /* | |
| 1405 * Give the result information to anyone who's | |
| 1406 * waiting for it. | |
| 1407 */ | |
| 1408 for (pcPtr = pendingCommands; pcPtr != NULL; pcPtr = pcPtr->nextPtr) | |
| 1409 { | |
| 1410 if (serial != pcPtr->serial || pcPtr->result != NULL) | |
| 1411 continue; | |
| 1412 | |
| 1413 pcPtr->code = code; | |
| 7009 | 1414 res = serverConvert(enc, res, &tofree); |
| 1415 if (tofree == NULL) | |
| 1416 res = vim_strsave(res); | |
| 1417 pcPtr->result = res; | |
| 7 | 1418 break; |
| 1419 } | |
| 1420 } | |
| 1421 else if (*p == 'n' && p[1] == 0) | |
| 1422 { | |
| 1423 Window win = 0; | |
| 1424 unsigned int u; | |
| 1425 int gotWindow; | |
| 1426 char_u *str; | |
| 1427 struct ServerReply *r; | |
| 39 | 1428 char_u *enc; |
| 7 | 1429 |
| 1430 /* | |
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1431 * This is a (n)otification. Sent with serverreply_send in Vim |
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1432 * script. Execute any autocommand and save it for later retrieval |
| 7 | 1433 */ |
| 1434 p += 2; | |
| 1435 gotWindow = 0; | |
| 1436 str = (char_u *)""; | |
| 39 | 1437 enc = NULL; |
| 1880 | 1438 while ((long_u)(p - propInfo) < numItems && *p == '-') |
| 7 | 1439 { |
| 1440 switch (p[1]) | |
| 1441 { | |
| 1442 case 'n': | |
| 1443 if (p[2] == ' ') | |
| 1444 str = p + 3; | |
| 1445 break; | |
| 39 | 1446 case 'E': |
| 1447 if (p[2] == ' ') | |
| 1448 enc = p + 3; | |
| 1449 break; | |
| 7 | 1450 case 'w': |
| 1451 if (sscanf((char *)p + 2, " %x", &u) == 1) | |
| 1452 { | |
| 1453 win = u; | |
| 1454 gotWindow = 1; | |
| 1455 } | |
| 1456 break; | |
| 1457 } | |
| 1458 while (*p != 0) | |
| 1459 p++; | |
| 1460 p++; | |
| 1461 } | |
| 1462 | |
| 1463 if (!gotWindow) | |
| 1464 continue; | |
| 39 | 1465 str = serverConvert(enc, str, &tofree); |
| 7 | 1466 if ((r = ServerReplyFind(win, SROP_Add)) != NULL) |
| 1467 { | |
| 1468 ga_concat(&(r->strings), str); | |
| 21 | 1469 ga_append(&(r->strings), NUL); |
| 7 | 1470 } |
| 1698 | 1471 { |
| 1472 char_u winstr[30]; | |
| 1473 | |
| 1474 sprintf((char *)winstr, "0x%x", (unsigned int)win); | |
| 1475 apply_autocmds(EVENT_REMOTEREPLY, winstr, str, TRUE, curbuf); | |
| 1476 } | |
| 39 | 1477 vim_free(tofree); |
| 7 | 1478 } |
| 1479 else | |
| 1480 { | |
| 1481 /* | |
| 1482 * Didn't recognize this thing. Just skip through the next | |
| 1483 * null character and try again. | |
| 1484 * Even if we get an 'r'(eply) we will throw it away as we | |
| 1485 * never specify (and thus expect) one | |
| 1486 */ | |
| 1487 while (*p != 0) | |
| 1488 p++; | |
| 1489 p++; | |
| 1490 } | |
| 1491 } | |
| 1492 XFree(propInfo); | |
| 1493 } | |
| 1494 | |
| 1495 /* | |
| 1496 * Append a given property to a given window, but set up an X error handler so | |
| 1497 * that if the append fails this procedure can return an error code rather | |
| 1498 * than having Xlib panic. | |
| 1499 * Return: 0 for OK, -1 for error | |
| 1500 */ | |
| 1501 static int | |
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1502 AppendPropCarefully( |
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1503 Display *dpy, // Display on which to operate. |
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1504 Window window, // Window whose property is to be modified. |
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1505 Atom property, // Name of property. |
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1506 char_u *value, // Characters to append to property. |
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1507 int length) // How much to append |
| 7 | 1508 { |
| 1509 XErrorHandler old_handler; | |
| 1510 | |
| 1511 old_handler = XSetErrorHandler(x_error_check); | |
| 1512 got_x_error = FALSE; | |
| 1513 XChangeProperty(dpy, window, property, XA_STRING, 8, | |
| 1514 PropModeAppend, value, length); | |
| 1515 XSync(dpy, False); | |
| 1516 (void) XSetErrorHandler(old_handler); | |
| 1517 return got_x_error ? -1 : 0; | |
| 1518 } | |
| 1519 | |
| 1520 | |
| 1521 /* | |
| 1522 * Another X Error handler, just used to check for errors. | |
| 1523 */ | |
| 1524 static int | |
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1525 x_error_check(Display *dpy UNUSED, XErrorEvent *error_event UNUSED) |
| 7 | 1526 { |
| 1527 got_x_error = TRUE; | |
| 1528 return 0; | |
| 1529 } | |
| 1530 | |
| 1531 /* | |
| 1532 * Check if "str" looks like it had a serial number appended. | |
| 1533 * Actually just checks if the name ends in a digit. | |
| 1534 */ | |
| 1535 static int | |
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1536 IsSerialName(char_u *str) |
| 7 | 1537 { |
| 1538 int len = STRLEN(str); | |
| 1539 | |
| 1540 return (len > 1 && vim_isdigit(str[len - 1])); | |
| 1541 } | |
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1542 #endif // FEAT_CLIENTSERVER |