tkConsole.c
上传用户:kellyonhid
上传日期:2013-10-12
资源大小:932k
文件大小:17k
- /*
- * tkConsole.c --
- *
- * This file implements a Tcl console for systems that may not
- * otherwise have access to a console. It uses the Text widget
- * and provides special access via a console command.
- *
- * Copyright (c) 1995-1996 Sun Microsystems, Inc.
- *
- * See the file "license.terms" for information on usage and redistribution
- * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
- *
- * SCCS: @(#) tkConsole.c 1.53 97/07/22 16:36:55
- */
- #include "tkInt.h"
- /*
- * A data structure of the following type holds information for each console
- * which a handler (i.e. a Tcl command) has been defined for a particular
- * top-level window.
- */
- typedef struct ConsoleInfo {
- Tcl_Interp *consoleInterp; /* Interpreter for the console. */
- Tcl_Interp *interp; /* Interpreter to send console commands. */
- } ConsoleInfo;
- static Tcl_Interp *gStdoutInterp = NULL;
- /*
- * Forward declarations for procedures defined later in this file:
- *
- * The first three will be used in the tk app shells...
- */
-
- void TkConsoleCreate _ANSI_ARGS_((void));
- int TkConsoleInit _ANSI_ARGS_((Tcl_Interp *interp));
- void TkConsolePrint _ANSI_ARGS_((Tcl_Interp *interp,
- int devId, char *buffer, long size));
- static int ConsoleCmd _ANSI_ARGS_((ClientData clientData,
- Tcl_Interp *interp, int argc, char **argv));
- static void ConsoleDeleteProc _ANSI_ARGS_((ClientData clientData));
- static void ConsoleEventProc _ANSI_ARGS_((ClientData clientData,
- XEvent *eventPtr));
- static int InterpreterCmd _ANSI_ARGS_((ClientData clientData,
- Tcl_Interp *interp, int argc, char **argv));
- static int ConsoleInput _ANSI_ARGS_((ClientData instanceData,
- char *buf, int toRead, int *errorCode));
- static int ConsoleOutput _ANSI_ARGS_((ClientData instanceData,
- char *buf, int toWrite, int *errorCode));
- static int ConsoleClose _ANSI_ARGS_((ClientData instanceData,
- Tcl_Interp *interp));
- static void ConsoleWatch _ANSI_ARGS_((ClientData instanceData,
- int mask));
- static int ConsoleHandle _ANSI_ARGS_((ClientData instanceData,
- int direction, ClientData *handlePtr));
- /*
- * This structure describes the channel type structure for file based IO:
- */
- static Tcl_ChannelType consoleChannelType = {
- "console", /* Type name. */
- NULL, /* Always non-blocking.*/
- ConsoleClose, /* Close proc. */
- ConsoleInput, /* Input proc. */
- ConsoleOutput, /* Output proc. */
- NULL, /* Seek proc. */
- NULL, /* Set option proc. */
- NULL, /* Get option proc. */
- ConsoleWatch, /* Watch for events on console. */
- ConsoleHandle, /* Get a handle from the device. */
- };
- /*
- *----------------------------------------------------------------------
- *
- * TkConsoleCreate --
- *
- * Create the console channels and install them as the standard
- * channels. All I/O will be discarded until TkConsoleInit is
- * called to attach the console to a text widget.
- *
- * Results:
- * None.
- *
- * Side effects:
- * Creates the console channel and installs it as the standard
- * channels.
- *
- *----------------------------------------------------------------------
- */
- void
- TkConsoleCreate()
- {
- Tcl_Channel consoleChannel;
- consoleChannel = Tcl_CreateChannel(&consoleChannelType, "console0",
- (ClientData) TCL_STDIN, TCL_READABLE);
- if (consoleChannel != NULL) {
- Tcl_SetChannelOption(NULL, consoleChannel, "-translation", "lf");
- Tcl_SetChannelOption(NULL, consoleChannel, "-buffering", "none");
- }
- Tcl_SetStdChannel(consoleChannel, TCL_STDIN);
- consoleChannel = Tcl_CreateChannel(&consoleChannelType, "console1",
- (ClientData) TCL_STDOUT, TCL_WRITABLE);
- if (consoleChannel != NULL) {
- Tcl_SetChannelOption(NULL, consoleChannel, "-translation", "lf");
- Tcl_SetChannelOption(NULL, consoleChannel, "-buffering", "none");
- }
- Tcl_SetStdChannel(consoleChannel, TCL_STDOUT);
- consoleChannel = Tcl_CreateChannel(&consoleChannelType, "console2",
- (ClientData) TCL_STDERR, TCL_WRITABLE);
- if (consoleChannel != NULL) {
- Tcl_SetChannelOption(NULL, consoleChannel, "-translation", "lf");
- Tcl_SetChannelOption(NULL, consoleChannel, "-buffering", "none");
- }
- Tcl_SetStdChannel(consoleChannel, TCL_STDERR);
- }
- /*
- *----------------------------------------------------------------------
- *
- * TkConsoleInit --
- *
- * Initialize the console. This code actually creates a new
- * application and associated interpreter. This effectivly hides
- * the implementation from the main application.
- *
- * Results:
- * None.
- *
- * Side effects:
- * A new console it created.
- *
- *----------------------------------------------------------------------
- */
- int
- TkConsoleInit(interp)
- Tcl_Interp *interp; /* Interpreter to use for prompting. */
- {
- Tcl_Interp *consoleInterp;
- ConsoleInfo *info;
- Tk_Window mainWindow = Tk_MainWindow(interp);
- #ifdef MAC_TCL
- static char initCmd[] = "source -rsrc {Console}";
- #else
- static char initCmd[] = "source $tk_library/console.tcl; wm title . "Scanalyze Console"";
- #endif
-
- consoleInterp = Tcl_CreateInterp();
- if (consoleInterp == NULL) {
- goto error;
- }
-
- /*
- * Initialized Tcl and Tk.
- */
- if (Tcl_Init(consoleInterp) != TCL_OK) {
- goto error;
- }
- if (Tk_Init(consoleInterp) != TCL_OK) {
- goto error;
- }
- gStdoutInterp = interp;
-
- /*
- * Add console commands to the interp
- */
- info = (ConsoleInfo *) ckalloc(sizeof(ConsoleInfo));
- info->interp = interp;
- info->consoleInterp = consoleInterp;
- Tcl_CreateCommand(interp, "console", ConsoleCmd, (ClientData) info,
- (Tcl_CmdDeleteProc *) ConsoleDeleteProc);
- Tcl_CreateCommand(consoleInterp, "consoleinterp", InterpreterCmd,
- (ClientData) info, (Tcl_CmdDeleteProc *) NULL);
- Tk_CreateEventHandler(mainWindow, StructureNotifyMask, ConsoleEventProc,
- (ClientData) info);
- Tcl_Preserve((ClientData) consoleInterp);
- if (Tcl_Eval(consoleInterp, initCmd) == TCL_ERROR) {
- /* goto error; -- no problem for now... */
- printf("Eval error: %s", consoleInterp->result);
- }
- Tcl_Release((ClientData) consoleInterp);
- return TCL_OK;
-
- error:
- if (consoleInterp != NULL) {
- Tcl_DeleteInterp(consoleInterp);
- }
- return TCL_ERROR;
- }
- /*
- *----------------------------------------------------------------------
- *
- * ConsoleOutput--
- *
- * Writes the given output on the IO channel. Returns count of how
- * many characters were actually written, and an error indication.
- *
- * Results:
- * A count of how many characters were written is returned and an
- * error indication is returned in an output argument.
- *
- * Side effects:
- * Writes output on the actual channel.
- *
- *----------------------------------------------------------------------
- */
- static int
- ConsoleOutput(instanceData, buf, toWrite, errorCode)
- ClientData instanceData; /* Indicates which device to use. */
- char *buf; /* The data buffer. */
- int toWrite; /* How many bytes to write? */
- int *errorCode; /* Where to store error code. */
- {
- *errorCode = 0;
- Tcl_SetErrno(0);
- if (gStdoutInterp != NULL) {
- TkConsolePrint(gStdoutInterp, (int) instanceData, buf, toWrite);
- }
-
- return toWrite;
- }
- /*
- *----------------------------------------------------------------------
- *
- * ConsoleInput --
- *
- * Read input from the console. Not currently implemented.
- *
- * Results:
- * Always returns EOF.
- *
- * Side effects:
- * None.
- *
- *----------------------------------------------------------------------
- */
- /* ARGSUSED */
- static int
- ConsoleInput(instanceData, buf, bufSize, errorCode)
- ClientData instanceData; /* Unused. */
- char *buf; /* Where to store data read. */
- int bufSize; /* How much space is available
- * in the buffer? */
- int *errorCode; /* Where to store error code. */
- {
- return 0; /* Always return EOF. */
- }
- /*
- *----------------------------------------------------------------------
- *
- * ConsoleClose --
- *
- * Closes the IO channel.
- *
- * Results:
- * Always returns 0 (success).
- *
- * Side effects:
- * Frees the dummy file associated with the channel.
- *
- *----------------------------------------------------------------------
- */
- /* ARGSUSED */
- static int
- ConsoleClose(instanceData, interp)
- ClientData instanceData; /* Unused. */
- Tcl_Interp *interp; /* Unused. */
- {
- return 0;
- }
- /*
- *----------------------------------------------------------------------
- *
- * ConsoleWatch --
- *
- * Called by the notifier to set up the console device so that
- * events will be noticed. Since there are no events on the
- * console, this routine just returns without doing anything.
- *
- * Results:
- * None.
- *
- * Side effects:
- * None.
- *
- *----------------------------------------------------------------------
- */
- /* ARGSUSED */
- static void
- ConsoleWatch(instanceData, mask)
- ClientData instanceData; /* Device ID for the channel. */
- int mask; /* OR-ed combination of
- * TCL_READABLE, TCL_WRITABLE and
- * TCL_EXCEPTION, for the events
- * we are interested in. */
- {
- }
- /*
- *----------------------------------------------------------------------
- *
- * ConsoleHandle --
- *
- * Invoked by the generic IO layer to get a handle from a channel.
- * Because console channels are not devices, this function always
- * fails.
- *
- * Results:
- * Always returns TCL_ERROR.
- *
- * Side effects:
- * None.
- *
- *----------------------------------------------------------------------
- */
- /* ARGSUSED */
- static int
- ConsoleHandle(instanceData, direction, handlePtr)
- ClientData instanceData; /* Device ID for the channel. */
- int direction; /* TCL_READABLE or TCL_WRITABLE to indicate
- * which direction of the channel is being
- * requested. */
- ClientData *handlePtr; /* Where to store handle */
- {
- return TCL_ERROR;
- }
- /*
- *----------------------------------------------------------------------
- *
- * ConsoleCmd --
- *
- * The console command implements a Tcl interface to the various console
- * options.
- *
- * Results:
- * None.
- *
- * Side effects:
- * None.
- *
- *----------------------------------------------------------------------
- */
- static int
- ConsoleCmd(clientData, interp, argc, argv)
- ClientData clientData; /* Not used. */
- Tcl_Interp *interp; /* Current interpreter. */
- int argc; /* Number of arguments. */
- char **argv; /* Argument strings. */
- {
- ConsoleInfo *info = (ConsoleInfo *) clientData;
- char c;
- int length;
- int result;
- Tcl_Interp *consoleInterp;
- if (argc < 2) {
- Tcl_AppendResult(interp, "wrong # args: should be "", argv[0],
- " option ?arg arg ...?"", (char *) NULL);
- return TCL_ERROR;
- }
-
- c = argv[1][0];
- length = strlen(argv[1]);
- result = TCL_OK;
- consoleInterp = info->consoleInterp;
- Tcl_Preserve((ClientData) consoleInterp);
- if ((c == 't') && (strncmp(argv[1], "title", length)) == 0) {
- Tcl_DString dString;
-
- Tcl_DStringInit(&dString);
- Tcl_DStringAppend(&dString, "wm title . ", -1);
- if (argc == 3) {
- Tcl_DStringAppendElement(&dString, argv[2]);
- }
- Tcl_Eval(consoleInterp, Tcl_DStringValue(&dString));
- Tcl_DStringFree(&dString);
- } else if ((c == 'h') && (strncmp(argv[1], "hide", length)) == 0) {
- Tcl_Eval(info->consoleInterp, "wm withdraw .");
- } else if ((c == 's') && (strncmp(argv[1], "show", length)) == 0) {
- Tcl_Eval(info->consoleInterp, "wm deiconify .");
- } else if ((c == 'e') && (strncmp(argv[1], "eval", length)) == 0) {
- if (argc == 3) {
- Tcl_Eval(info->consoleInterp, argv[2]);
- } else {
- Tcl_AppendResult(interp, "wrong # args: should be "", argv[0],
- " eval command"", (char *) NULL);
- return TCL_ERROR;
- }
- } else {
- Tcl_AppendResult(interp, "bad option "", argv[1],
- "": should be hide, show, or title",
- (char *) NULL);
- result = TCL_ERROR;
- }
- Tcl_Release((ClientData) consoleInterp);
- return result;
- }
- /*
- *----------------------------------------------------------------------
- *
- * InterpreterCmd --
- *
- * This command allows the console interp to communicate with the
- * main interpreter.
- *
- * Results:
- * None.
- *
- * Side effects:
- * None.
- *
- *----------------------------------------------------------------------
- */
- static int
- InterpreterCmd(clientData, interp, argc, argv)
- ClientData clientData; /* Not used. */
- Tcl_Interp *interp; /* Current interpreter. */
- int argc; /* Number of arguments. */
- char **argv; /* Argument strings. */
- {
- ConsoleInfo *info = (ConsoleInfo *) clientData;
- char c;
- int length;
- int result;
- Tcl_Interp *otherInterp;
- if (argc < 2) {
- Tcl_AppendResult(interp, "wrong # args: should be "", argv[0],
- " option ?arg arg ...?"", (char *) NULL);
- return TCL_ERROR;
- }
-
- c = argv[1][0];
- length = strlen(argv[1]);
- otherInterp = info->interp;
- Tcl_Preserve((ClientData) otherInterp);
- if ((c == 'e') && (strncmp(argv[1], "eval", length)) == 0) {
- result = Tcl_GlobalEval(otherInterp, argv[2]);
- Tcl_AppendResult(interp, otherInterp->result, (char *) NULL);
- } else if ((c == 'r') && (strncmp(argv[1], "record", length)) == 0) {
- Tcl_RecordAndEval(otherInterp, argv[2], TCL_EVAL_GLOBAL);
- result = TCL_OK;
- Tcl_AppendResult(interp, otherInterp->result, (char *) NULL);
- } else {
- Tcl_AppendResult(interp, "bad option "", argv[1],
- "": should be eval or record",
- (char *) NULL);
- result = TCL_ERROR;
- }
- Tcl_Release((ClientData) otherInterp);
- return result;
- }
- /*
- *----------------------------------------------------------------------
- *
- * ConsoleDeleteProc --
- *
- * If the console command is deleted we destroy the console window
- * and all associated data structures.
- *
- * Results:
- * None.
- *
- * Side effects:
- * A new console it created.
- *
- *----------------------------------------------------------------------
- */
- void
- ConsoleDeleteProc(clientData)
- ClientData clientData;
- {
- ConsoleInfo *info = (ConsoleInfo *) clientData;
- Tcl_DeleteInterp(info->consoleInterp);
- info->consoleInterp = NULL;
- }
- /*
- *----------------------------------------------------------------------
- *
- * ConsoleEventProc --
- *
- * This event procedure is registered on the main window of the
- * slave interpreter. If the user or a running script causes the
- * main window to be destroyed, then we need to inform the console
- * interpreter by invoking "tkConsoleExit".
- *
- * Results:
- * None.
- *
- * Side effects:
- * Invokes the "tkConsoleExit" procedure in the console interp.
- *
- *----------------------------------------------------------------------
- */
- static void
- ConsoleEventProc(clientData, eventPtr)
- ClientData clientData;
- XEvent *eventPtr;
- {
- ConsoleInfo *info = (ConsoleInfo *) clientData;
- Tcl_Interp *consoleInterp;
-
- if (eventPtr->type == DestroyNotify) {
- consoleInterp = info->consoleInterp;
- /*
- * It is possible that the console interpreter itself has
- * already been deleted. In that case the consoleInterp
- * field will be set to NULL. If the interpreter is already
- * gone, we do not have to do any work here.
- */
-
- if (consoleInterp == (Tcl_Interp *) NULL) {
- return;
- }
- Tcl_Preserve((ClientData) consoleInterp);
- Tcl_Eval(consoleInterp, "tkConsoleExit");
- Tcl_Release((ClientData) consoleInterp);
- }
- }
- /*
- *----------------------------------------------------------------------
- *
- * TkConsolePrint --
- *
- * Prints to the give text to the console. Given the main interp
- * this functions find the appropiate console interp and forwards
- * the text to be added to that console.
- *
- * Results:
- * None.
- *
- * Side effects:
- * None.
- *
- *----------------------------------------------------------------------
- */
- void
- TkConsolePrint(interp, devId, buffer, size)
- Tcl_Interp *interp; /* Main interpreter. */
- int devId; /* TCL_STDOUT for stdout, TCL_STDERR for
- * stderr. */
- char *buffer; /* Text buffer. */
- long size; /* Size of text buffer. */
- {
- Tcl_DString command, output;
- Tcl_CmdInfo cmdInfo;
- char *cmd;
- ConsoleInfo *info;
- Tcl_Interp *consoleInterp;
- int result;
- if (interp == NULL) {
- return;
- }
-
- if (devId == TCL_STDERR) {
- cmd = "tkConsoleOutput stderr ";
- } else {
- cmd = "tkConsoleOutput stdout ";
- }
-
- result = Tcl_GetCommandInfo(interp, "console", &cmdInfo);
- if (result == 0) {
- return;
- }
- info = (ConsoleInfo *) cmdInfo.clientData;
-
- Tcl_DStringInit(&output);
- Tcl_DStringAppend(&output, buffer, size);
- Tcl_DStringInit(&command);
- Tcl_DStringAppend(&command, cmd, strlen(cmd));
- Tcl_DStringAppendElement(&command, output.string);
- consoleInterp = info->consoleInterp;
- Tcl_Preserve((ClientData) consoleInterp);
- Tcl_Eval(consoleInterp, command.string);
- Tcl_Release((ClientData) consoleInterp);
-
- Tcl_DStringFree(&command);
- Tcl_DStringFree(&output);
- }