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- /*
- * Hacked version of Tk 3.3 main. This is supplied so that otcl will work
- * with either Tcl/Tk 7.3/3.6 or 7.4/4.0. It checks for a 7.4 only define in
- * tcl.h. For 3.6, it geterates no code. For Tcl 7.3, it generates a function
- * Tk_Main like one would find in 4.0.
- *
- * main.c --
- *
- * This file contains the main program for "wish", a windowing
- * shell based on Tk and Tcl. It also provides a template that
- * can be used as the basis for main programs for other Tk
- * applications.
- *
- * Copyright (c) 1990-1993 The Regents of the University of California.
- * All rights reserved.
- *
- * Permission is hereby granted, without written agreement and without
- * license or royalty fees, to use, copy, modify, and distribute this
- * software and its documentation for any purpose, provided that the
- * above copyright notice and the following two paragraphs appear in
- * all copies of this software.
- *
- * IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR
- * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT
- * OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF
- * CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
- * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
- * AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
- * ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATION TO
- * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
- */
-
- #ifndef lint
- static char rcsid[] = "$Header: /e/WESE/ObjectTcl/tkMain.C,v 1.2 1995/05/11 14:42:26 deans Exp $ SPRITE (Berkeley)";
- #endif
-
- #include <stdio.h>
- #include <tcl.h>
- #if TCL_MINOR_VERSION == 3
- #include <stdlib.h>
- #include <string.h>
- #include <unistd.h>
- #include <tk.h>
- #include "Otcl.H"
-
- /*
- * Global variables used by the main program:
- */
-
- static Tk_Window mainWindow; /* The main window for the application. If
- * NULL then the application no longer
- * exists. */
- static Tcl_Interp *interp; /* Interpreter for this application. */
- static Tcl_DString command; /* Used to assemble lines of terminal input
- * into Tcl commands. */
- static int tty; /* Non-zero means standard input is a
- * terminal-like device. Zero means it's
- * a file. */
- static char errorExitCmd[] = "exit 1";
-
- /*
- * Command-line options:
- */
-
- static int synchronize = 0;
- static char *fileName = NULL;
- static char *name = NULL;
- static char *display = NULL;
- static char *geometry = NULL;
-
- static Tk_ArgvInfo argTable[] = {
- {"-file", TK_ARGV_STRING, (char *) NULL, (char *) &fileName,
- "File from which to read commands"},
- {"-geometry", TK_ARGV_STRING, (char *) NULL, (char *) &geometry,
- "Initial geometry for window"},
- {"-display", TK_ARGV_STRING, (char *) NULL, (char *) &display,
- "Display to use"},
- {"-name", TK_ARGV_STRING, (char *) NULL, (char *) &name,
- "Name to use for application"},
- {"-sync", TK_ARGV_CONSTANT, (char *) 1, (char *) &synchronize,
- "Use synchronous mode for display server"},
- {(char *) NULL, TK_ARGV_END, (char *) NULL, (char *) NULL,
- (char *) NULL}
- };
-
- /*
- * Declaration for Tcl command procedure to create demo widget. This
- * procedure is only invoked if SQUARE_DEMO is defined.
- */
-
- extern int SquareCmd _ANSI_ARGS_((ClientData clientData,
- Tcl_Interp *interp, int argc, char *argv[]));
-
- /*
- * Forward declarations for procedures defined later in this file:
- */
-
- static void Prompt _ANSI_ARGS_((Tcl_Interp *interp, int partial));
- static void StdinProc _ANSI_ARGS_((ClientData clientData,
- int mask));
-
- /*
- *----------------------------------------------------------------------
- *
- * main --
- *
- * Main program for Wish.
- *
- * Results:
- * None. This procedure never returns (it exits the process when
- * it's done
- *
- * Side effects:
- * This procedure initializes the wish world and then starts
- * interpreting commands; almost anything could happen, depending
- * on the script being interpreted.
- *
- *----------------------------------------------------------------------
- */
-
- extern "C" void
- Tk_Main(int argc, /* Number of arguments. */
- char **argv) /* Array of argument strings. */
- {
- char *args, *p, *msg;
- char buf[20];
- int code;
-
- interp = Tcl_CreateInterp();
- #ifdef TCL_MEM_DEBUG
- Tcl_InitMemory(interp);
- #endif
-
- /*
- * Parse command-line arguments.
- */
-
- if (Tk_ParseArgv(interp, (Tk_Window) NULL, &argc, argv, argTable, 0)
- != TCL_OK) {
- fprintf(stderr, "%s\n", interp->result);
- exit(1);
- }
- if (name == NULL) {
- if (fileName != NULL) {
- p = fileName;
- } else {
- p = argv[0];
- }
- name = strrchr(p, '/');
- if (name != NULL) {
- name++;
- } else {
- name = p;
- }
- }
-
- /*
- * If a display was specified, put it into the DISPLAY
- * environment variable so that it will be available for
- * any sub-processes created by us.
- */
-
- if (display != NULL) {
- Tcl_SetVar2(interp, "env", "DISPLAY", display, TCL_GLOBAL_ONLY);
- }
-
- /*
- * Initialize the Tk application.
- */
-
- mainWindow = Tk_CreateMainWindow(interp, display, name, "Tk");
- if (mainWindow == NULL) {
- fprintf(stderr, "%s\n", interp->result);
- exit(1);
- }
- if (synchronize) {
- XSynchronize(Tk_Display(mainWindow), True);
- }
- Tk_GeometryRequest(mainWindow, 200, 200);
-
- /*
- * Make command-line arguments available in the Tcl variables "argc"
- * and "argv". Also set the "geometry" variable from the geometry
- * specified on the command line.
- */
-
- args = Tcl_Merge(argc-1, argv+1);
- Tcl_SetVar(interp, "argv", args, TCL_GLOBAL_ONLY);
- ckfree(args);
- sprintf(buf, "%d", argc-1);
- Tcl_SetVar(interp, "argc", buf, TCL_GLOBAL_ONLY);
- Tcl_SetVar(interp, "argv0", (fileName != NULL) ? fileName : argv[0],
- TCL_GLOBAL_ONLY);
- if (geometry != NULL) {
- Tcl_SetVar(interp, "geometry", geometry, TCL_GLOBAL_ONLY);
- }
-
- /*
- * Set the "tcl_interactive" variable.
- */
-
- tty = isatty(0);
- Tcl_SetVar(interp, "tcl_interactive",
- ((fileName == NULL) && tty) ? "1" : "0", TCL_GLOBAL_ONLY);
-
- /*
- * Add a few application-specific commands to the application's
- * interpreter.
- */
-
- #ifdef SQUARE_DEMO
- Tcl_CreateCommand(interp, "square", SquareCmd, (ClientData) mainWindow,
- (void (*)()) NULL);
- #endif
-
- /*
- * Invoke application-specific initialization.
- */
-
- if (Tcl_AppInit(interp) != TCL_OK) {
- fprintf(stderr, "Tcl_AppInit failed: %s\n", interp->result);
- }
-
- /*
- * Set the geometry of the main window, if requested.
- */
-
- if (geometry != NULL) {
- code = Tcl_VarEval(interp, "wm geometry . ", geometry, (char *) NULL);
- if (code != TCL_OK) {
- fprintf(stderr, "%s\n", interp->result);
- }
- }
-
- /*
- * Invoke the script specified on the command line, if any.
- */
-
- if (fileName != NULL) {
- code = Tcl_VarEval(interp, "source ", fileName, (char *) NULL);
- if (code != TCL_OK) {
- goto error;
- }
- tty = 0;
- } else {
- /*
- * Commands will come from standard input, so set up an event
- * handler for standard input. If the input device is aEvaluate the
- * .rc file, if one has been specified, set up an event handler
- * for standard input, and print a prompt if the input
- * device is a terminal.
- */
-
- if (tcl_RcFileName != NULL) {
- Tcl_DString buffer;
- char *fullName;
- FILE *f;
-
- fullName = Tcl_TildeSubst(interp, tcl_RcFileName, &buffer);
- if (fullName == NULL) {
- fprintf(stderr, "%s\n", interp->result);
- } else {
- f = fopen(fullName, "r");
- if (f != NULL) {
- code = Tcl_EvalFile(interp, fullName);
- if (code != TCL_OK) {
- fprintf(stderr, "%s\n", interp->result);
- }
- fclose(f);
- }
- }
- Tcl_DStringFree(&buffer);
- }
- Tk_CreateFileHandler(0, TK_READABLE, StdinProc, (ClientData) 0);
- if (tty) {
- Prompt(interp, 0);
- }
- }
- fflush(stdout);
- Tcl_DStringInit(&command);
-
- /*
- * Loop infinitely, waiting for commands to execute. When there
- * are no windows left, Tk_MainLoop returns and we exit.
- */
-
- Tk_MainLoop();
-
- /*
- * Don't exit directly, but rather invoke the Tcl "exit" command.
- * This gives the application the opportunity to redefine "exit"
- * to do additional cleanup.
- */
-
- Tcl_Eval(interp, "exit");
- exit(1);
-
- error:
- msg = Tcl_GetVar(interp, "errorInfo", TCL_GLOBAL_ONLY);
- if (msg == NULL) {
- msg = interp->result;
- }
- fprintf(stderr, "%s\n", msg);
- Tcl_Eval(interp, errorExitCmd);
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * StdinProc --
- *
- * This procedure is invoked by the event dispatcher whenever
- * standard input becomes readable. It grabs the next line of
- * input characters, adds them to a command being assembled, and
- * executes the command if it's complete.
- *
- * Results:
- * None.
- *
- * Side effects:
- * Could be almost arbitrary, depending on the command that's
- * typed.
- *
- *----------------------------------------------------------------------
- */
-
- /* ARGSUSED */
- static void
- StdinProc(ClientData clientData, /* Not used. */
- int mask) /* Not used. */
- {
- #define BUFFER_SIZE 4000
- char input[BUFFER_SIZE+1];
- static int gotPartial = 0;
- char *cmd;
- int code, count;
-
- count = read(fileno(stdin), input, BUFFER_SIZE);
- if (count <= 0) {
- if (!gotPartial) {
- if (tty) {
- Tcl_Eval(interp, "exit");
- exit(1);
- } else {
- Tk_DeleteFileHandler(0);
- }
- return;
- } else {
- count = 0;
- }
- }
- cmd = Tcl_DStringAppend(&command, input, count);
- if (count != 0) {
- if ((input[count-1] != '\n') && (input[count-1] != ';')) {
- gotPartial = 1;
- goto prompt;
- }
- if (!Tcl_CommandComplete(cmd)) {
- gotPartial = 1;
- goto prompt;
- }
- }
- gotPartial = 0;
-
- /*
- * Disable the stdin file handler while evaluating the command;
- * otherwise if the command re-enters the event loop we might
- * process commands from stdin before the current command is
- * finished. Among other things, this will trash the text of the
- * command being evaluated.
- */
-
- Tk_CreateFileHandler(0, 0, StdinProc, (ClientData) 0);
- code = Tcl_RecordAndEval(interp, cmd, 0);
- Tk_CreateFileHandler(0, TK_READABLE, StdinProc, (ClientData) 0);
- Tcl_DStringFree(&command);
- if (*interp->result != 0) {
- if ((code != TCL_OK) || (tty)) {
- printf("%s\n", interp->result);
- }
- }
-
- /*
- * Output a prompt.
- */
-
- prompt:
- if (tty) {
- Prompt(interp, gotPartial);
- }
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * Prompt --
- *
- * Issue a prompt on standard output, or invoke a script
- * to issue the prompt.
- *
- * Results:
- * None.
- *
- * Side effects:
- * A prompt gets output, and a Tcl script may be evaluated
- * in interp.
- *
- *----------------------------------------------------------------------
- */
-
- static void
- Prompt(Tcl_Interp *interp, /* Interpreter to use for prompting. */
- int partial) /* Non-zero means there already
- * exists a partial command, so use
- * the secondary prompt. */
- {
- char *promptCmd;
- int code;
-
- promptCmd = Tcl_GetVar(interp,
- partial ? "tcl_prompt2" : "tcl_prompt1", TCL_GLOBAL_ONLY);
- if (promptCmd == NULL) {
- defaultPrompt:
- if (!partial) {
- fputs("% ", stdout);
- }
- } else {
- code = Tcl_Eval(interp, promptCmd);
- if (code != TCL_OK) {
- Tcl_AddErrorInfo(interp,
- "\n (script that generates prompt)");
- fprintf(stderr, "%s\n", interp->result);
- goto defaultPrompt;
- }
- }
- fflush(stdout);
- }
- #endif
-