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dashley |
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/* $Header$ */ |
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/* |
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* tkMain.c -- |
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* |
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* This file contains a generic main program for Tk-based applications. |
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* It can be used as-is for many applications, just by supplying a |
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* different appInitProc procedure for each specific application. |
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* Or, it can be used as a template for creating new main programs |
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* for Tk applications. |
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* |
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* Copyright (c) 1990-1994 The Regents of the University of California. |
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* Copyright (c) 1994-1997 Sun Microsystems, Inc. |
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* |
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* See the file "license.terms" for information on usage and redistribution |
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* of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
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* |
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* RCS: @(#) $Id: tkmain.c,v 1.1.1.1 2001/06/13 05:05:07 dtashley Exp $ |
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*/ |
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#define MODULE_TK_MAIN |
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#include <ctype.h> |
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#include <stdio.h> |
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#include <string.h> |
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#include <tcl.h> |
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#include <tclInt.h> |
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#include "appinit.h" |
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#include "build_config.h" |
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#include "extninit.h" |
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#include "msgstrs.h" |
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#include "tk.h" |
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#include "tkInt.h" |
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#ifdef NO_STDLIB_H |
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# include "../compat/stdlib.h" |
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#else |
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# include <stdlib.h> |
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#endif |
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#ifdef __WIN32__ |
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#include "tkWinInt.h" |
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#endif |
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typedef struct ThreadSpecificData { |
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Tcl_Interp *interp; /* Interpreter for this thread. */ |
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Tcl_DString command; /* Used to assemble lines of terminal input |
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* into Tcl commands. */ |
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Tcl_DString line; /* Used to read the next line from the |
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* terminal input. */ |
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int tty; /* Non-zero means standard input is a |
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* terminal-like device. Zero means it's |
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* a file. */ |
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} ThreadSpecificData; |
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Tcl_ThreadDataKey dataKey; |
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/* |
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* Declarations for various library procedures and variables (don't want |
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* to include tkInt.h or tkPort.h here, because people might copy this |
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* file out of the Tk source directory to make their own modified versions). |
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* Note: don't declare "exit" here even though a declaration is really |
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* needed, because it will conflict with a declaration elsewhere on |
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* some systems. |
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*/ |
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#if !defined(__WIN32__) && !defined(_WIN32) |
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extern int isatty _ANSI_ARGS_((int fd)); |
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extern char * strrchr _ANSI_ARGS_((CONST char *string, int c)); |
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#endif |
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extern void TkpDisplayWarning _ANSI_ARGS_((char *msg, |
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char *title)); |
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/* |
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* Forward declarations for procedures defined later in this file. |
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*/ |
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static void Prompt _ANSI_ARGS_((Tcl_Interp *interp, int partial)); |
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static void StdinProc _ANSI_ARGS_((ClientData clientData, |
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int mask)); |
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/* |
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*---------------------------------------------------------------------- |
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* |
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* Tk_MainEx -- |
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* |
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* Main program for Wish and most other Tk-based applications. |
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* |
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* Results: |
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* None. This procedure never returns (it exits the process when |
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* it's done. |
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* |
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* Side effects: |
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* This procedure initializes the Tk world and then starts |
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* interpreting commands; almost anything could happen, depending |
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* on the script being interpreted. |
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* |
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*---------------------------------------------------------------------- |
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*/ |
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void |
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Tk_MainEx(argc, argv, appInitProc, interp) |
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int argc; /* Number of arguments. */ |
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char **argv; /* Array of argument strings. */ |
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Tcl_AppInitProc *appInitProc; /* Application-specific initialization |
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* procedure to call after most |
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* initialization but before starting |
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* to execute commands. This input |
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* parameter is ignored because of the |
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* integration of the code automatically |
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* generated by "mktclapp". |
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*/ |
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Tcl_Interp *interp; |
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{ |
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char *args, *fileName; |
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char buf[TCL_INTEGER_SPACE]; |
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int code; |
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size_t length; |
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Tcl_Channel inChannel, outChannel; |
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Tcl_DString argString; |
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ThreadSpecificData *tsdPtr; |
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#ifdef __WIN32__ |
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HANDLE handle; |
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#endif |
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#if 1 |
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/* Dope the environment variables so that the first place the |
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** run-time code searches for the library files is in the "baked in" |
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** libraries. Over time, this should be changed to permanently |
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** bake things in so that this trick isn't necessary. |
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*/ |
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putenv("TCL_LIBRARY=" ET_TCL_LIBRARY); |
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putenv("TK_LIBRARY=" ET_TK_LIBRARY); |
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/* Run the local initialization procedure for the ET module. |
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** This will dope the interpreter so that attempts to load the |
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** library files will get redirected internally. |
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*/ |
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Et_DoInit(interp); |
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#endif |
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/* appInitProc = Et_DoInit; */ |
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/* |
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* Ensure that we are getting the matching version of Tcl. This is |
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* really only an issue when Tk is loaded dynamically. |
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*/ |
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if (Tcl_InitStubs(interp, TCL_VERSION, 1) == NULL) { |
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abort(); |
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} |
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tsdPtr = (ThreadSpecificData *) |
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Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData)); |
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Tcl_FindExecutable(argv[0]); |
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tsdPtr->interp = interp; |
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#if (defined(__WIN32__) || defined(MAC_TCL)) |
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Tk_InitConsoleChannels(interp); |
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#endif |
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#ifdef TCL_MEM_DEBUG |
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Tcl_InitMemory(interp); |
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#endif |
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/* |
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* Parse command-line arguments. A leading "-file" argument is |
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* ignored (a historical relic from the distant past). If the |
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* next argument doesn't start with a "-" then strip it off and |
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* use it as the name of a script file to process. |
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*/ |
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fileName = TclGetStartupScriptFileName(); |
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if (argc > 1) { |
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length = strlen(argv[1]); |
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if ((length >= 2) && (strncmp(argv[1], "-file", length) == 0)) { |
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argc--; |
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argv++; |
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} |
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} |
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if (fileName == NULL) { |
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if ((argc > 1) && (argv[1][0] != '-')) { |
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fileName = argv[1]; |
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argc--; |
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argv++; |
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} |
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} |
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/* |
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* Make command-line arguments available in the Tcl variables "argc" |
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* and "argv". |
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*/ |
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args = Tcl_Merge(argc-1, argv+1); |
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Tcl_ExternalToUtfDString(NULL, args, -1, &argString); |
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Tcl_SetVar(interp, "argv", Tcl_DStringValue(&argString), TCL_GLOBAL_ONLY); |
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Tcl_DStringFree(&argString); |
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ckfree(args); |
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sprintf(buf, "%d", argc-1); |
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if (fileName == NULL) { |
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Tcl_ExternalToUtfDString(NULL, argv[0], -1, &argString); |
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} else { |
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fileName = Tcl_ExternalToUtfDString(NULL, fileName, -1, &argString); |
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} |
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Tcl_SetVar(interp, "argc", buf, TCL_GLOBAL_ONLY); |
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Tcl_SetVar(interp, "argv0", Tcl_DStringValue(&argString), TCL_GLOBAL_ONLY); |
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/* |
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* Set the "tcl_interactive" variable. |
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*/ |
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/* |
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* For now, under Windows, we assume we are not running as a console mode |
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* app, so we need to use the GUI console. In order to enable this, we |
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* always claim to be running on a tty. This probably isn't the right |
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* way to do it. |
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*/ |
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#ifdef __WIN32__ |
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handle = GetStdHandle(STD_INPUT_HANDLE); |
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if ((handle == INVALID_HANDLE_VALUE) || (handle == 0) |
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|| (GetFileType(handle) == FILE_TYPE_UNKNOWN)) { |
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/* |
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* If it's a bad or closed handle, then it's been connected |
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* to a wish console window. |
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*/ |
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tsdPtr->tty = 1; |
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} else if (GetFileType(handle) == FILE_TYPE_CHAR) { |
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/* |
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* A character file handle is a tty by definition. |
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*/ |
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tsdPtr->tty = 1; |
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} else { |
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tsdPtr->tty = 0; |
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} |
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#else |
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tsdPtr->tty = isatty(0); |
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#endif |
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Tcl_SetVar(interp, "tcl_interactive", |
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((fileName == NULL) && tsdPtr->tty) ? "1" : "0", TCL_GLOBAL_ONLY); |
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/* |
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* Invoke application-specific initialization. |
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*/ |
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if ((*appInitProc)(interp) != TCL_OK) { |
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TkpDisplayWarning(Tcl_GetStringResult(interp), |
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"Application initialization failed"); |
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} |
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/* Register any extensions that should be registered for the |
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** executable currently being built. |
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*/ |
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ExtninitInit(interp); |
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/* Set a Tcl variable to indicate the particular product |
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** we are building. This is used in the startup message script |
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** to announce product version, and may be used other |
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** places, as well. |
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*/ |
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Tcl_SetVar(interp, |
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BUILD_CONFIG_PRODUCT_NAME_VARIABLE, |
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BUILD_CONFIG_STATIC_WISH_ALIAS, |
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TCL_GLOBAL_ONLY); |
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/* Set Tcl variable to indicate the relese version of the |
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** product we are building. This is used in the startup message script |
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** to announce product version, and may be used other |
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** places, as well. |
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*/ |
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Tcl_SetVar(interp, |
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BUILD_CONFIG_PRODUCT_VERSION_VARIABLE, |
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BUILD_CONFIG_RELEASE_VERSION, |
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TCL_GLOBAL_ONLY); |
281 |
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282 |
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/* Change the title of the console window to reflect |
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** the product name and version. |
284 |
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*/ |
285 |
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Tcl_GlobalEval(interp, |
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"wm title . \"" |
287 |
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BUILD_CONFIG_STATIC_WISH_ALIAS |
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" v" |
289 |
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BUILD_CONFIG_RELEASE_VERSION |
290 |
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"\""); |
291 |
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292 |
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/* Output the introductory message to the console. |
293 |
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** The script called is generic and applies to both |
294 |
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** IjuScripter and IjuConsole. |
295 |
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*/ |
296 |
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Tcl_GlobalEval(interp, BUILD_CONFIG_StartupMessageScript); |
297 |
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298 |
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/* |
299 |
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* Invoke the script specified on the command line, if any. |
300 |
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*/ |
301 |
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302 |
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if (fileName != NULL) { |
303 |
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Tcl_ResetResult(interp); |
304 |
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code = Tcl_EvalFile(interp, fileName); |
305 |
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if (code != TCL_OK) { |
306 |
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/* |
307 |
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* The following statement guarantees that the errorInfo |
308 |
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* variable is set properly. |
309 |
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*/ |
310 |
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311 |
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Tcl_AddErrorInfo(interp, ""); |
312 |
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TkpDisplayWarning(Tcl_GetVar(interp, "errorInfo", |
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TCL_GLOBAL_ONLY), "Error in startup script"); |
314 |
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Tcl_DeleteInterp(interp); |
315 |
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Tcl_Exit(1); |
316 |
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} |
317 |
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tsdPtr->tty = 0; |
318 |
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} else { |
319 |
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320 |
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/* |
321 |
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* Evaluate the .rc file, if one has been specified. |
322 |
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*/ |
323 |
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324 |
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Tcl_SourceRCFile(interp); |
325 |
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326 |
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/* |
327 |
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* Establish a channel handler for stdin. |
328 |
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*/ |
329 |
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330 |
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inChannel = Tcl_GetStdChannel(TCL_STDIN); |
331 |
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if (inChannel) { |
332 |
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Tcl_CreateChannelHandler(inChannel, TCL_READABLE, StdinProc, |
333 |
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(ClientData) inChannel); |
334 |
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} |
335 |
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if (tsdPtr->tty) { |
336 |
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Prompt(interp, 0); |
337 |
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} |
338 |
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} |
339 |
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Tcl_DStringFree(&argString); |
340 |
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341 |
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outChannel = Tcl_GetStdChannel(TCL_STDOUT); |
342 |
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if (outChannel) { |
343 |
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Tcl_Flush(outChannel); |
344 |
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} |
345 |
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Tcl_DStringInit(&tsdPtr->command); |
346 |
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Tcl_DStringInit(&tsdPtr->line); |
347 |
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Tcl_ResetResult(interp); |
348 |
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|
349 |
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/* |
350 |
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* Loop infinitely, waiting for commands to execute. When there |
351 |
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* are no windows left, Tk_MainLoop returns and we exit. |
352 |
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*/ |
353 |
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354 |
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Tk_MainLoop(); |
355 |
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Tcl_DeleteInterp(interp); |
356 |
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Tcl_Exit(0); |
357 |
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} |
358 |
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|
359 |
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/* |
360 |
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*---------------------------------------------------------------------- |
361 |
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* |
362 |
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* StdinProc -- |
363 |
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* |
364 |
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* This procedure is invoked by the event dispatcher whenever |
365 |
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* standard input becomes readable. It grabs the next line of |
366 |
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* input characters, adds them to a command being assembled, and |
367 |
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* executes the command if it's complete. |
368 |
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* |
369 |
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* Results: |
370 |
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* None. |
371 |
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* |
372 |
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* Side effects: |
373 |
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* Could be almost arbitrary, depending on the command that's |
374 |
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* typed. |
375 |
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* |
376 |
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*---------------------------------------------------------------------- |
377 |
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*/ |
378 |
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|
379 |
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/* ARGSUSED */ |
380 |
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static void |
381 |
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StdinProc(clientData, mask) |
382 |
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ClientData clientData; /* Not used. */ |
383 |
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int mask; /* Not used. */ |
384 |
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{ |
385 |
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static int gotPartial = 0; |
386 |
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char *cmd; |
387 |
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int code, count; |
388 |
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Tcl_Channel chan = (Tcl_Channel) clientData; |
389 |
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ThreadSpecificData *tsdPtr = (ThreadSpecificData *) |
390 |
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Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData)); |
391 |
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Tcl_Interp *interp = tsdPtr->interp; |
392 |
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393 |
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count = Tcl_Gets(chan, &tsdPtr->line); |
394 |
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|
395 |
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if (count < 0) { |
396 |
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if (!gotPartial) { |
397 |
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if (tsdPtr->tty) { |
398 |
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Tcl_Exit(0); |
399 |
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} else { |
400 |
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Tcl_DeleteChannelHandler(chan, StdinProc, (ClientData) chan); |
401 |
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} |
402 |
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return; |
403 |
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} |
404 |
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} |
405 |
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|
406 |
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(void) Tcl_DStringAppend(&tsdPtr->command, Tcl_DStringValue( |
407 |
|
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&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 */ |