| 1 |
/* $Header$ */ |
| 2 |
|
| 3 |
/* |
| 4 |
* tkMain.c -- |
| 5 |
* |
| 6 |
* This file contains a generic main program for Tk-based applications. |
| 7 |
* It can be used as-is for many applications, just by supplying a |
| 8 |
* different appInitProc procedure for each specific application. |
| 9 |
* Or, it can be used as a template for creating new main programs |
| 10 |
* for Tk applications. |
| 11 |
* |
| 12 |
* Copyright (c) 1990-1994 The Regents of the University of California. |
| 13 |
* Copyright (c) 1994-1997 Sun Microsystems, Inc. |
| 14 |
* |
| 15 |
* See the file "license.terms" for information on usage and redistribution |
| 16 |
* of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
| 17 |
* |
| 18 |
* RCS: @(#) $Id: tkmain.c,v 1.1.1.1 2001/06/13 05:05:07 dtashley Exp $ |
| 19 |
*/ |
| 20 |
|
| 21 |
#define MODULE_TK_MAIN |
| 22 |
|
| 23 |
#include <ctype.h> |
| 24 |
#include <stdio.h> |
| 25 |
#include <string.h> |
| 26 |
#include <tcl.h> |
| 27 |
#include <tclInt.h> |
| 28 |
|
| 29 |
#include "appinit.h" |
| 30 |
#include "build_config.h" |
| 31 |
#include "extninit.h" |
| 32 |
#include "msgstrs.h" |
| 33 |
|
| 34 |
#include "tk.h" |
| 35 |
#include "tkInt.h" |
| 36 |
#ifdef NO_STDLIB_H |
| 37 |
# include "../compat/stdlib.h" |
| 38 |
#else |
| 39 |
# include <stdlib.h> |
| 40 |
#endif |
| 41 |
#ifdef __WIN32__ |
| 42 |
#include "tkWinInt.h" |
| 43 |
#endif |
| 44 |
|
| 45 |
|
| 46 |
typedef struct ThreadSpecificData { |
| 47 |
Tcl_Interp *interp; /* Interpreter for this thread. */ |
| 48 |
Tcl_DString command; /* Used to assemble lines of terminal input |
| 49 |
* into Tcl commands. */ |
| 50 |
Tcl_DString line; /* Used to read the next line from the |
| 51 |
* terminal input. */ |
| 52 |
int tty; /* Non-zero means standard input is a |
| 53 |
* terminal-like device. Zero means it's |
| 54 |
* a file. */ |
| 55 |
} ThreadSpecificData; |
| 56 |
Tcl_ThreadDataKey dataKey; |
| 57 |
|
| 58 |
/* |
| 59 |
* Declarations for various library procedures and variables (don't want |
| 60 |
* to include tkInt.h or tkPort.h here, because people might copy this |
| 61 |
* file out of the Tk source directory to make their own modified versions). |
| 62 |
* Note: don't declare "exit" here even though a declaration is really |
| 63 |
* needed, because it will conflict with a declaration elsewhere on |
| 64 |
* some systems. |
| 65 |
*/ |
| 66 |
|
| 67 |
#if !defined(__WIN32__) && !defined(_WIN32) |
| 68 |
extern int isatty _ANSI_ARGS_((int fd)); |
| 69 |
extern char * strrchr _ANSI_ARGS_((CONST char *string, int c)); |
| 70 |
#endif |
| 71 |
extern void TkpDisplayWarning _ANSI_ARGS_((char *msg, |
| 72 |
char *title)); |
| 73 |
|
| 74 |
/* |
| 75 |
* Forward declarations for procedures defined later in this file. |
| 76 |
*/ |
| 77 |
|
| 78 |
static void Prompt _ANSI_ARGS_((Tcl_Interp *interp, int partial)); |
| 79 |
static void StdinProc _ANSI_ARGS_((ClientData clientData, |
| 80 |
int mask)); |
| 81 |
|
| 82 |
/* |
| 83 |
*---------------------------------------------------------------------- |
| 84 |
* |
| 85 |
* Tk_MainEx -- |
| 86 |
* |
| 87 |
* Main program for Wish and most other Tk-based applications. |
| 88 |
* |
| 89 |
* Results: |
| 90 |
* None. This procedure never returns (it exits the process when |
| 91 |
* it's done. |
| 92 |
* |
| 93 |
* Side effects: |
| 94 |
* This procedure initializes the Tk world and then starts |
| 95 |
* interpreting commands; almost anything could happen, depending |
| 96 |
* on the script being interpreted. |
| 97 |
* |
| 98 |
*---------------------------------------------------------------------- |
| 99 |
*/ |
| 100 |
void |
| 101 |
Tk_MainEx(argc, argv, appInitProc, interp) |
| 102 |
int argc; /* Number of arguments. */ |
| 103 |
char **argv; /* Array of argument strings. */ |
| 104 |
Tcl_AppInitProc *appInitProc; /* Application-specific initialization |
| 105 |
* procedure to call after most |
| 106 |
* initialization but before starting |
| 107 |
* to execute commands. This input |
| 108 |
* parameter is ignored because of the |
| 109 |
* integration of the code automatically |
| 110 |
* generated by "mktclapp". |
| 111 |
*/ |
| 112 |
Tcl_Interp *interp; |
| 113 |
{ |
| 114 |
char *args, *fileName; |
| 115 |
char buf[TCL_INTEGER_SPACE]; |
| 116 |
int code; |
| 117 |
size_t length; |
| 118 |
Tcl_Channel inChannel, outChannel; |
| 119 |
Tcl_DString argString; |
| 120 |
ThreadSpecificData *tsdPtr; |
| 121 |
#ifdef __WIN32__ |
| 122 |
HANDLE handle; |
| 123 |
#endif |
| 124 |
#if 1 |
| 125 |
/* Dope the environment variables so that the first place the |
| 126 |
** run-time code searches for the library files is in the "baked in" |
| 127 |
** libraries. Over time, this should be changed to permanently |
| 128 |
** bake things in so that this trick isn't necessary. |
| 129 |
*/ |
| 130 |
putenv("TCL_LIBRARY=" ET_TCL_LIBRARY); |
| 131 |
putenv("TK_LIBRARY=" ET_TK_LIBRARY); |
| 132 |
|
| 133 |
/* Run the local initialization procedure for the ET module. |
| 134 |
** This will dope the interpreter so that attempts to load the |
| 135 |
** library files will get redirected internally. |
| 136 |
*/ |
| 137 |
|
| 138 |
Et_DoInit(interp); |
| 139 |
#endif |
| 140 |
|
| 141 |
/* appInitProc = Et_DoInit; */ |
| 142 |
|
| 143 |
/* |
| 144 |
* Ensure that we are getting the matching version of Tcl. This is |
| 145 |
* really only an issue when Tk is loaded dynamically. |
| 146 |
*/ |
| 147 |
|
| 148 |
if (Tcl_InitStubs(interp, TCL_VERSION, 1) == NULL) { |
| 149 |
abort(); |
| 150 |
} |
| 151 |
|
| 152 |
tsdPtr = (ThreadSpecificData *) |
| 153 |
Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData)); |
| 154 |
|
| 155 |
Tcl_FindExecutable(argv[0]); |
| 156 |
tsdPtr->interp = interp; |
| 157 |
|
| 158 |
#if (defined(__WIN32__) || defined(MAC_TCL)) |
| 159 |
Tk_InitConsoleChannels(interp); |
| 160 |
#endif |
| 161 |
|
| 162 |
#ifdef TCL_MEM_DEBUG |
| 163 |
Tcl_InitMemory(interp); |
| 164 |
#endif |
| 165 |
|
| 166 |
/* |
| 167 |
* Parse command-line arguments. A leading "-file" argument is |
| 168 |
* ignored (a historical relic from the distant past). If the |
| 169 |
* next argument doesn't start with a "-" then strip it off and |
| 170 |
* use it as the name of a script file to process. |
| 171 |
*/ |
| 172 |
|
| 173 |
fileName = TclGetStartupScriptFileName(); |
| 174 |
|
| 175 |
if (argc > 1) { |
| 176 |
length = strlen(argv[1]); |
| 177 |
if ((length >= 2) && (strncmp(argv[1], "-file", length) == 0)) { |
| 178 |
argc--; |
| 179 |
argv++; |
| 180 |
} |
| 181 |
} |
| 182 |
if (fileName == NULL) { |
| 183 |
if ((argc > 1) && (argv[1][0] != '-')) { |
| 184 |
fileName = argv[1]; |
| 185 |
argc--; |
| 186 |
argv++; |
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} |
| 188 |
} |
| 189 |
|
| 190 |
/* |
| 191 |
* Make command-line arguments available in the Tcl variables "argc" |
| 192 |
* and "argv". |
| 193 |
*/ |
| 194 |
|
| 195 |
args = Tcl_Merge(argc-1, argv+1); |
| 196 |
Tcl_ExternalToUtfDString(NULL, args, -1, &argString); |
| 197 |
Tcl_SetVar(interp, "argv", Tcl_DStringValue(&argString), TCL_GLOBAL_ONLY); |
| 198 |
Tcl_DStringFree(&argString); |
| 199 |
ckfree(args); |
| 200 |
sprintf(buf, "%d", argc-1); |
| 201 |
|
| 202 |
if (fileName == NULL) { |
| 203 |
Tcl_ExternalToUtfDString(NULL, argv[0], -1, &argString); |
| 204 |
} else { |
| 205 |
fileName = Tcl_ExternalToUtfDString(NULL, fileName, -1, &argString); |
| 206 |
} |
| 207 |
Tcl_SetVar(interp, "argc", buf, TCL_GLOBAL_ONLY); |
| 208 |
Tcl_SetVar(interp, "argv0", Tcl_DStringValue(&argString), TCL_GLOBAL_ONLY); |
| 209 |
|
| 210 |
/* |
| 211 |
* Set the "tcl_interactive" variable. |
| 212 |
*/ |
| 213 |
|
| 214 |
/* |
| 215 |
* For now, under Windows, we assume we are not running as a console mode |
| 216 |
* app, so we need to use the GUI console. In order to enable this, we |
| 217 |
* always claim to be running on a tty. This probably isn't the right |
| 218 |
* way to do it. |
| 219 |
*/ |
| 220 |
|
| 221 |
#ifdef __WIN32__ |
| 222 |
handle = GetStdHandle(STD_INPUT_HANDLE); |
| 223 |
|
| 224 |
if ((handle == INVALID_HANDLE_VALUE) || (handle == 0) |
| 225 |
|| (GetFileType(handle) == FILE_TYPE_UNKNOWN)) { |
| 226 |
/* |
| 227 |
* If it's a bad or closed handle, then it's been connected |
| 228 |
* to a wish console window. |
| 229 |
*/ |
| 230 |
|
| 231 |
tsdPtr->tty = 1; |
| 232 |
} else if (GetFileType(handle) == FILE_TYPE_CHAR) { |
| 233 |
/* |
| 234 |
* A character file handle is a tty by definition. |
| 235 |
*/ |
| 236 |
|
| 237 |
tsdPtr->tty = 1; |
| 238 |
} else { |
| 239 |
tsdPtr->tty = 0; |
| 240 |
} |
| 241 |
|
| 242 |
#else |
| 243 |
tsdPtr->tty = isatty(0); |
| 244 |
#endif |
| 245 |
Tcl_SetVar(interp, "tcl_interactive", |
| 246 |
((fileName == NULL) && tsdPtr->tty) ? "1" : "0", TCL_GLOBAL_ONLY); |
| 247 |
|
| 248 |
/* |
| 249 |
* Invoke application-specific initialization. |
| 250 |
*/ |
| 251 |
|
| 252 |
if ((*appInitProc)(interp) != TCL_OK) { |
| 253 |
TkpDisplayWarning(Tcl_GetStringResult(interp), |
| 254 |
"Application initialization failed"); |
| 255 |
} |
| 256 |
|
| 257 |
/* Register any extensions that should be registered for the |
| 258 |
** executable currently being built. |
| 259 |
*/ |
| 260 |
ExtninitInit(interp); |
| 261 |
|
| 262 |
/* Set a Tcl variable to indicate the particular product |
| 263 |
** we are building. This is used in the startup message script |
| 264 |
** to announce product version, and may be used other |
| 265 |
** places, as well. |
| 266 |
*/ |
| 267 |
Tcl_SetVar(interp, |
| 268 |
BUILD_CONFIG_PRODUCT_NAME_VARIABLE, |
| 269 |
BUILD_CONFIG_STATIC_WISH_ALIAS, |
| 270 |
TCL_GLOBAL_ONLY); |
| 271 |
|
| 272 |
/* Set Tcl variable to indicate the relese version of the |
| 273 |
** product we are building. This is used in the startup message script |
| 274 |
** to announce product version, and may be used other |
| 275 |
** places, as well. |
| 276 |
*/ |
| 277 |
Tcl_SetVar(interp, |
| 278 |
BUILD_CONFIG_PRODUCT_VERSION_VARIABLE, |
| 279 |
BUILD_CONFIG_RELEASE_VERSION, |
| 280 |
TCL_GLOBAL_ONLY); |
| 281 |
|
| 282 |
/* Change the title of the console window to reflect |
| 283 |
** the product name and version. |
| 284 |
*/ |
| 285 |
Tcl_GlobalEval(interp, |
| 286 |
"wm title . \"" |
| 287 |
BUILD_CONFIG_STATIC_WISH_ALIAS |
| 288 |
" v" |
| 289 |
BUILD_CONFIG_RELEASE_VERSION |
| 290 |
"\""); |
| 291 |
|
| 292 |
/* Output the introductory message to the console. |
| 293 |
** The script called is generic and applies to both |
| 294 |
** IjuScripter and IjuConsole. |
| 295 |
*/ |
| 296 |
Tcl_GlobalEval(interp, BUILD_CONFIG_StartupMessageScript); |
| 297 |
|
| 298 |
/* |
| 299 |
* Invoke the script specified on the command line, if any. |
| 300 |
*/ |
| 301 |
|
| 302 |
if (fileName != NULL) { |
| 303 |
Tcl_ResetResult(interp); |
| 304 |
code = Tcl_EvalFile(interp, fileName); |
| 305 |
if (code != TCL_OK) { |
| 306 |
/* |
| 307 |
* The following statement guarantees that the errorInfo |
| 308 |
* variable is set properly. |
| 309 |
*/ |
| 310 |
|
| 311 |
Tcl_AddErrorInfo(interp, ""); |
| 312 |
TkpDisplayWarning(Tcl_GetVar(interp, "errorInfo", |
| 313 |
TCL_GLOBAL_ONLY), "Error in startup script"); |
| 314 |
Tcl_DeleteInterp(interp); |
| 315 |
Tcl_Exit(1); |
| 316 |
} |
| 317 |
tsdPtr->tty = 0; |
| 318 |
} else { |
| 319 |
|
| 320 |
/* |
| 321 |
* Evaluate the .rc file, if one has been specified. |
| 322 |
*/ |
| 323 |
|
| 324 |
Tcl_SourceRCFile(interp); |
| 325 |
|
| 326 |
/* |
| 327 |
* Establish a channel handler for stdin. |
| 328 |
*/ |
| 329 |
|
| 330 |
inChannel = Tcl_GetStdChannel(TCL_STDIN); |
| 331 |
if (inChannel) { |
| 332 |
Tcl_CreateChannelHandler(inChannel, TCL_READABLE, StdinProc, |
| 333 |
(ClientData) inChannel); |
| 334 |
} |
| 335 |
if (tsdPtr->tty) { |
| 336 |
Prompt(interp, 0); |
| 337 |
} |
| 338 |
} |
| 339 |
Tcl_DStringFree(&argString); |
| 340 |
|
| 341 |
outChannel = Tcl_GetStdChannel(TCL_STDOUT); |
| 342 |
if (outChannel) { |
| 343 |
Tcl_Flush(outChannel); |
| 344 |
} |
| 345 |
Tcl_DStringInit(&tsdPtr->command); |
| 346 |
Tcl_DStringInit(&tsdPtr->line); |
| 347 |
Tcl_ResetResult(interp); |
| 348 |
|
| 349 |
/* |
| 350 |
* Loop infinitely, waiting for commands to execute. When there |
| 351 |
* are no windows left, Tk_MainLoop returns and we exit. |
| 352 |
*/ |
| 353 |
|
| 354 |
Tk_MainLoop(); |
| 355 |
Tcl_DeleteInterp(interp); |
| 356 |
Tcl_Exit(0); |
| 357 |
} |
| 358 |
|
| 359 |
/* |
| 360 |
*---------------------------------------------------------------------- |
| 361 |
* |
| 362 |
* StdinProc -- |
| 363 |
* |
| 364 |
* This procedure is invoked by the event dispatcher whenever |
| 365 |
* standard input becomes readable. It grabs the next line of |
| 366 |
* input characters, adds them to a command being assembled, and |
| 367 |
* executes the command if it's complete. |
| 368 |
* |
| 369 |
* Results: |
| 370 |
* None. |
| 371 |
* |
| 372 |
* Side effects: |
| 373 |
* Could be almost arbitrary, depending on the command that's |
| 374 |
* typed. |
| 375 |
* |
| 376 |
*---------------------------------------------------------------------- |
| 377 |
*/ |
| 378 |
|
| 379 |
/* ARGSUSED */ |
| 380 |
static void |
| 381 |
StdinProc(clientData, mask) |
| 382 |
ClientData clientData; /* Not used. */ |
| 383 |
int mask; /* Not used. */ |
| 384 |
{ |
| 385 |
static int gotPartial = 0; |
| 386 |
char *cmd; |
| 387 |
int code, count; |
| 388 |
Tcl_Channel chan = (Tcl_Channel) clientData; |
| 389 |
ThreadSpecificData *tsdPtr = (ThreadSpecificData *) |
| 390 |
Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData)); |
| 391 |
Tcl_Interp *interp = tsdPtr->interp; |
| 392 |
|
| 393 |
count = Tcl_Gets(chan, &tsdPtr->line); |
| 394 |
|
| 395 |
if (count < 0) { |
| 396 |
if (!gotPartial) { |
| 397 |
if (tsdPtr->tty) { |
| 398 |
Tcl_Exit(0); |
| 399 |
} else { |
| 400 |
Tcl_DeleteChannelHandler(chan, StdinProc, (ClientData) chan); |
| 401 |
} |
| 402 |
return; |
| 403 |
} |
| 404 |
} |
| 405 |
|
| 406 |
(void) Tcl_DStringAppend(&tsdPtr->command, Tcl_DStringValue( |
| 407 |
&tsdPtr->line), -1); |
| 408 |
cmd = Tcl_DStringAppend(&tsdPtr->command, "\n", -1); |
| 409 |
Tcl_DStringFree(&tsdPtr->line); |
| 410 |
if (!Tcl_CommandComplete(cmd)) { |
| 411 |
gotPartial = 1; |
| 412 |
goto prompt; |
| 413 |
} |
| 414 |
gotPartial = 0; |
| 415 |
|
| 416 |
/* |
| 417 |
* Disable the stdin channel handler while evaluating the command; |
| 418 |
* otherwise if the command re-enters the event loop we might |
| 419 |
* process commands from stdin before the current command is |
| 420 |
* finished. Among other things, this will trash the text of the |
| 421 |
* command being evaluated. |
| 422 |
*/ |
| 423 |
|
| 424 |
Tcl_CreateChannelHandler(chan, 0, StdinProc, (ClientData) chan); |
| 425 |
code = Tcl_RecordAndEval(interp, cmd, TCL_EVAL_GLOBAL); |
| 426 |
|
| 427 |
chan = Tcl_GetStdChannel(TCL_STDIN); |
| 428 |
if (chan) { |
| 429 |
Tcl_CreateChannelHandler(chan, TCL_READABLE, StdinProc, |
| 430 |
(ClientData) chan); |
| 431 |
} |
| 432 |
Tcl_DStringFree(&tsdPtr->command); |
| 433 |
if (Tcl_GetStringResult(interp)[0] != '\0') { |
| 434 |
if ((code != TCL_OK) || (tsdPtr->tty)) { |
| 435 |
chan = Tcl_GetStdChannel(TCL_STDOUT); |
| 436 |
if (chan) { |
| 437 |
Tcl_WriteObj(chan, Tcl_GetObjResult(interp)); |
| 438 |
Tcl_WriteChars(chan, "\n", 1); |
| 439 |
} |
| 440 |
} |
| 441 |
} |
| 442 |
|
| 443 |
/* |
| 444 |
* Output a prompt. |
| 445 |
*/ |
| 446 |
|
| 447 |
prompt: |
| 448 |
if (tsdPtr->tty) { |
| 449 |
Prompt(interp, gotPartial); |
| 450 |
} |
| 451 |
Tcl_ResetResult(interp); |
| 452 |
} |
| 453 |
|
| 454 |
/* |
| 455 |
*---------------------------------------------------------------------- |
| 456 |
* |
| 457 |
* Prompt -- |
| 458 |
* |
| 459 |
* Issue a prompt on standard output, or invoke a script |
| 460 |
* to issue the prompt. |
| 461 |
* |
| 462 |
* Results: |
| 463 |
* None. |
| 464 |
* |
| 465 |
* Side effects: |
| 466 |
* A prompt gets output, and a Tcl script may be evaluated |
| 467 |
* in interp. |
| 468 |
* |
| 469 |
*---------------------------------------------------------------------- |
| 470 |
*/ |
| 471 |
|
| 472 |
static void |
| 473 |
Prompt(interp, partial) |
| 474 |
Tcl_Interp *interp; /* Interpreter to use for prompting. */ |
| 475 |
int partial; /* Non-zero means there already |
| 476 |
* exists a partial command, so use |
| 477 |
* the secondary prompt. */ |
| 478 |
{ |
| 479 |
char *promptCmd; |
| 480 |
int code; |
| 481 |
Tcl_Channel outChannel, errChannel; |
| 482 |
|
| 483 |
promptCmd = Tcl_GetVar(interp, |
| 484 |
partial ? "tcl_prompt2" : "tcl_prompt1", TCL_GLOBAL_ONLY); |
| 485 |
if (promptCmd == NULL) { |
| 486 |
defaultPrompt: |
| 487 |
if (!partial) { |
| 488 |
|
| 489 |
/* |
| 490 |
* We must check that outChannel is a real channel - it |
| 491 |
* is possible that someone has transferred stdout out of |
| 492 |
* this interpreter with "interp transfer". |
| 493 |
*/ |
| 494 |
|
| 495 |
outChannel = Tcl_GetChannel(interp, "stdout", NULL); |
| 496 |
if (outChannel != (Tcl_Channel) NULL) { |
| 497 |
Tcl_WriteChars(outChannel, "% ", 2); |
| 498 |
} |
| 499 |
} |
| 500 |
} else { |
| 501 |
code = Tcl_Eval(interp, promptCmd); |
| 502 |
if (code != TCL_OK) { |
| 503 |
Tcl_AddErrorInfo(interp, |
| 504 |
"\n (script that generates prompt)"); |
| 505 |
/* |
| 506 |
* We must check that errChannel is a real channel - it |
| 507 |
* is possible that someone has transferred stderr out of |
| 508 |
* this interpreter with "interp transfer". |
| 509 |
*/ |
| 510 |
|
| 511 |
errChannel = Tcl_GetChannel(interp, "stderr", NULL); |
| 512 |
if (errChannel != (Tcl_Channel) NULL) { |
| 513 |
Tcl_WriteObj(errChannel, Tcl_GetObjResult(interp)); |
| 514 |
Tcl_WriteChars(errChannel, "\n", 1); |
| 515 |
} |
| 516 |
goto defaultPrompt; |
| 517 |
} |
| 518 |
} |
| 519 |
outChannel = Tcl_GetChannel(interp, "stdout", NULL); |
| 520 |
if (outChannel != (Tcl_Channel) NULL) { |
| 521 |
Tcl_Flush(outChannel); |
| 522 |
} |
| 523 |
} |
| 524 |
|
| 525 |
/* End of tkmain.c */ |
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