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/*
* 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.
*/
#include "tkInt.h"
/*
* Each console is associated with an instance of the ConsoleInfo struct.
* It keeps track of what interp holds the Tk application that displays
* the console, and what interp is controlled by the interactions in that
* console. A refCount permits the struct to be shared as instance data
* by commands and by channels.
*/
typedef struct ConsoleInfo {
Tcl_Interp *consoleInterp; /* Interpreter displaying the console. */
Tcl_Interp *interp; /* Interpreter controlled by console. */
int refCount;
} ConsoleInfo;
/*
* Each console channel holds an instance of the ChannelData struct as
* its instance data. It contains ConsoleInfo, so the channel can work
* with the appropriate console window, and a type value to distinguish
* the stdout channel from the stderr channel.
*/
typedef struct ChannelData {
ConsoleInfo *info;
int type; /* TCL_STDOUT or TCL_STDERR */
} ChannelData;
/*
* Prototypes for local procedures defined in this file:
*/
static int ConsoleClose(ClientData instanceData, Tcl_Interp *interp);
static void ConsoleDeleteProc(ClientData clientData);
static void ConsoleEventProc(ClientData clientData, XEvent *eventPtr);
static int ConsoleHandle(ClientData instanceData, int direction,
ClientData *handlePtr);
static int ConsoleInput(ClientData instanceData, char *buf, int toRead,
int *errorCode);
static int ConsoleObjCmd(ClientData clientData, Tcl_Interp *interp,
int objc, Tcl_Obj *const objv[]);
static int ConsoleOutput(ClientData instanceData, const char *buf,
int toWrite, int *errorCode);
static void ConsoleWatch(ClientData instanceData, int mask);
static void DeleteConsoleInterp(ClientData clientData);
static void InterpDeleteProc(ClientData clientData, Tcl_Interp *interp);
static int InterpreterObjCmd(ClientData clientData, Tcl_Interp *interp,
int objc, Tcl_Obj *const objv[]);
/*
* This structure describes the channel type structure for file based IO:
*/
static const Tcl_ChannelType consoleChannelType = {
"console", /* Type name. */
TCL_CHANNEL_VERSION_4, /* v4 channel */
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. */
NULL, /* close2proc. */
NULL, /* Always non-blocking.*/
NULL, /* flush proc. */
NULL, /* handler proc. */
NULL, /* wide seek proc */
NULL, /* thread action proc */
NULL
};
#ifdef __WIN32__
#include <windows.h>
/*
*----------------------------------------------------------------------
*
* ShouldUseConsoleChannel
*
* Check to see if console window should be used for a given standard
* channel.
*
* Results:
* None.
*
* Side effects:
* Creates the console channel and installs it as the standard channels.
*
*----------------------------------------------------------------------
*/
static int
ShouldUseConsoleChannel(
int type)
{
DWORD handleId; /* Standard handle to retrieve. */
DCB dcb;
DWORD consoleParams;
DWORD fileType;
HANDLE handle;
switch (type) {
case TCL_STDIN:
handleId = STD_INPUT_HANDLE;
break;
case TCL_STDOUT:
handleId = STD_OUTPUT_HANDLE;
break;
case TCL_STDERR:
handleId = STD_ERROR_HANDLE;
break;
default:
return 0;
break;
}
handle = GetStdHandle(handleId);
/*
* Note that we need to check for 0 because Windows will return 0 if this
* is not a console mode application, even though this is not a valid
* handle.
*/
if ((handle == INVALID_HANDLE_VALUE) || (handle == 0)) {
return 1;
}
/*
* Win2K BUG: GetStdHandle(STD_OUTPUT_HANDLE) can return what appears to
* be a valid handle. See TclpGetDefaultStdChannel() for this change
* implemented. We didn't change it here because GetFileType() [below]
* will catch this with FILE_TYPE_UNKNOWN and appropriately return a value
* of 1, anyways.
*
* char dummyBuff[1];
* DWORD dummyWritten;
*
* if ((type == TCL_STDOUT)
* && !WriteFile(handle, dummyBuff, 0, &dummyWritten, NULL)) {
* return 1;
* }
*/
fileType = GetFileType(handle);
/*
* If the file is a character device, we need to try to figure out whether
* it is a serial port, a console, or something else. We test for the
* console case first because this is more common.
*/
if (fileType == FILE_TYPE_CHAR) {
dcb.DCBlength = sizeof(DCB);
if (!GetConsoleMode(handle, &consoleParams) &&
!GetCommState(handle, &dcb)) {
/*
* Don't use a CHAR type channel for stdio, otherwise Tk runs into
* trouble with the MS DevStudio debugger.
*/
return 1;
}
} else if (fileType == FILE_TYPE_UNKNOWN) {
return 1;
} else if (Tcl_GetStdChannel(type) == NULL) {
return 1;
}
return 0;
}
#else
/*
* Mac should always use a console channel, Unix should if it's trying to
*/
#define ShouldUseConsoleChannel(chan) (1)
#endif
/*
*----------------------------------------------------------------------
*
* Tk_InitConsoleChannels --
*
* Create the console channels and install them as the standard channels.
* All I/O will be discarded until Tk_CreateConsoleWindow 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
Tk_InitConsoleChannels(
Tcl_Interp *interp)
{
static Tcl_ThreadDataKey consoleInitKey;
int *consoleInitPtr, doIn, doOut, doErr;
ConsoleInfo *info;
Tcl_Channel consoleChannel;
/*
* Ensure that we are getting a compatible version of Tcl. This is really
* only an issue when Tk is loaded dynamically.
*/
if (Tcl_InitStubs(interp, TCL_VERSION, 0) == NULL) {
return;
}
consoleInitPtr = Tcl_GetThreadData(&consoleInitKey, (int) sizeof(int));
if (*consoleInitPtr) {
/*
* We've already initialized console channels in this thread.
*/
return;
}
*consoleInitPtr = 1;
doIn = ShouldUseConsoleChannel(TCL_STDIN);
doOut = ShouldUseConsoleChannel(TCL_STDOUT);
doErr = ShouldUseConsoleChannel(TCL_STDERR);
if (!(doIn || doOut || doErr)) {
/*
* No std channels should be tied to the console; thus, no need to
* create the console.
*/
return;
}
/*
* At least one std channel wants to be tied to the console, so create the
* interp for it to live in.
*/
info = ckalloc(sizeof(ConsoleInfo));
info->consoleInterp = NULL;
info->interp = NULL;
info->refCount = 0;
if (doIn) {
ChannelData *data = ckalloc(sizeof(ChannelData));
data->info = info;
data->info->refCount++;
data->type = TCL_STDIN;
consoleChannel = Tcl_CreateChannel(&consoleChannelType, "console0",
data, TCL_READABLE);
if (consoleChannel != NULL) {
Tcl_SetChannelOption(NULL, consoleChannel, "-translation", "lf");
Tcl_SetChannelOption(NULL, consoleChannel, "-buffering", "none");
Tcl_SetChannelOption(NULL, consoleChannel, "-encoding", "utf-8");
}
Tcl_SetStdChannel(consoleChannel, TCL_STDIN);
Tcl_RegisterChannel(NULL, consoleChannel);
}
if (doOut) {
ChannelData *data = ckalloc(sizeof(ChannelData));
data->info = info;
data->info->refCount++;
data->type = TCL_STDOUT;
consoleChannel = Tcl_CreateChannel(&consoleChannelType, "console1",
data, TCL_WRITABLE);
if (consoleChannel != NULL) {
Tcl_SetChannelOption(NULL, consoleChannel, "-translation", "lf");
Tcl_SetChannelOption(NULL, consoleChannel, "-buffering", "none");
Tcl_SetChannelOption(NULL, consoleChannel, "-encoding", "utf-8");
}
Tcl_SetStdChannel(consoleChannel, TCL_STDOUT);
Tcl_RegisterChannel(NULL, consoleChannel);
}
if (doErr) {
ChannelData *data = ckalloc(sizeof(ChannelData));
data->info = info;
data->info->refCount++;
data->type = TCL_STDERR;
consoleChannel = Tcl_CreateChannel(&consoleChannelType, "console2",
data, TCL_WRITABLE);
if (consoleChannel != NULL) {
Tcl_SetChannelOption(NULL, consoleChannel, "-translation", "lf");
Tcl_SetChannelOption(NULL, consoleChannel, "-buffering", "none");
Tcl_SetChannelOption(NULL, consoleChannel, "-encoding", "utf-8");
}
Tcl_SetStdChannel(consoleChannel, TCL_STDERR);
Tcl_RegisterChannel(NULL, consoleChannel);
}
}
/*
*----------------------------------------------------------------------
*
* Tk_CreateConsoleWindow --
*
* 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
Tk_CreateConsoleWindow(
Tcl_Interp *interp) /* Interpreter to use for prompting. */
{
Tcl_Channel chan;
ConsoleInfo *info;
Tk_Window mainWindow;
Tcl_Command token;
int result = TCL_OK;
int haveConsoleChannel = 1;
/* Init an interp with Tcl and Tk */
Tcl_Interp *consoleInterp = Tcl_CreateInterp();
if (Tcl_Init(consoleInterp) != TCL_OK) {
goto error;
}
if (Tk_Init(consoleInterp) != TCL_OK) {
goto error;
}
/*
* Fetch the instance data from whatever std channel is a
* console channel. If none, create fresh instance data.
*/
if (Tcl_GetChannelType(chan = Tcl_GetStdChannel(TCL_STDIN))
== &consoleChannelType) {
} else if (Tcl_GetChannelType(chan = Tcl_GetStdChannel(TCL_STDOUT))
== &consoleChannelType) {
} else if (Tcl_GetChannelType(chan = Tcl_GetStdChannel(TCL_STDERR))
== &consoleChannelType) {
} else {
haveConsoleChannel = 0;
}
if (haveConsoleChannel) {
ChannelData *data = (ChannelData *) Tcl_GetChannelInstanceData(chan);
info = data->info;
if (info->consoleInterp) {
/*
* New ConsoleInfo for a new console window.
*/
info = ckalloc(sizeof(ConsoleInfo));
info->refCount = 0;
/*
* Update any console channels to make use of the new console.
*/
if (Tcl_GetChannelType(chan = Tcl_GetStdChannel(TCL_STDIN))
== &consoleChannelType) {
data = (ChannelData *) Tcl_GetChannelInstanceData(chan);
data->info->refCount--;
data->info = info;
data->info->refCount++;
}
if (Tcl_GetChannelType(chan = Tcl_GetStdChannel(TCL_STDOUT))
== &consoleChannelType) {
data = (ChannelData *) Tcl_GetChannelInstanceData(chan);
data->info->refCount--;
data->info = info;
data->info->refCount++;
}
if (Tcl_GetChannelType(chan = Tcl_GetStdChannel(TCL_STDERR))
== &consoleChannelType) {
data = (ChannelData *) Tcl_GetChannelInstanceData(chan);
data->info->refCount--;
data->info = info;
data->info->refCount++;
}
}
} else {
info = ckalloc(sizeof(ConsoleInfo));
info->refCount = 0;
}
info->consoleInterp = consoleInterp;
info->interp = interp;
Tcl_CallWhenDeleted(consoleInterp, InterpDeleteProc, info);
info->refCount++;
Tcl_CreateThreadExitHandler(DeleteConsoleInterp, consoleInterp);
/*
* Add console commands to the interp
*/
token = Tcl_CreateObjCommand(interp, "console", ConsoleObjCmd, info,
ConsoleDeleteProc);
info->refCount++;
/*
* We don't have to count the ref held by the [consoleinterp] command
* in the consoleInterp. The ref held by the consoleInterp delete
* handler takes care of us.
*/
Tcl_CreateObjCommand(consoleInterp, "consoleinterp", InterpreterObjCmd,
info, NULL);
mainWindow = Tk_MainWindow(interp);
if (mainWindow) {
Tk_CreateEventHandler(mainWindow, StructureNotifyMask,
ConsoleEventProc, info);
info->refCount++;
}
Tcl_Preserve(consoleInterp);
result = Tcl_GlobalEval(consoleInterp, "source $tk_library/console.tcl");
if (result == TCL_ERROR) {
Tcl_SetReturnOptions(interp,
Tcl_GetReturnOptions(consoleInterp, result));
Tcl_SetObjResult(interp, Tcl_GetObjResult(consoleInterp));
}
Tcl_Release(consoleInterp);
if (result == TCL_ERROR) {
Tcl_DeleteCommandFromToken(interp, token);
mainWindow = Tk_MainWindow(interp);
if (mainWindow) {
Tk_DeleteEventHandler(mainWindow, StructureNotifyMask,
ConsoleEventProc, info);
if (--info->refCount <= 0) {
ckfree(info);
}
}
goto error;
}
return TCL_OK;
error:
Tcl_AddErrorInfo(interp, "\n (creating console window)");
if (!Tcl_InterpDeleted(consoleInterp)) {
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(
ClientData instanceData, /* Indicates which device to use. */
const char *buf, /* The data buffer. */
int toWrite, /* How many bytes to write? */
int *errorCode) /* Where to store error code. */
{
ChannelData *data = instanceData;
ConsoleInfo *info = data->info;
*errorCode = 0;
Tcl_SetErrno(0);
if (info) {
Tcl_Interp *consoleInterp = info->consoleInterp;
if (consoleInterp && !Tcl_InterpDeleted(consoleInterp)) {
Tcl_DString ds;
Tcl_Encoding utf8 = Tcl_GetEncoding(NULL, "utf-8");
/*
* Not checking for utf8 == NULL. Did not check for TCL_ERROR
* from Tcl_SetChannelOption() in Tk_InitConsoleChannels() either.
* Assumption is utf-8 Tcl_Encoding is reliably present.
*/
const char *bytes
= Tcl_ExternalToUtfDString(utf8, buf, toWrite, &ds);
int numBytes = Tcl_DStringLength(&ds);
Tcl_Obj *cmd = Tcl_NewStringObj("tk::ConsoleOutput", -1);
Tcl_FreeEncoding(utf8);
if (data->type == TCL_STDERR) {
Tcl_ListObjAppendElement(NULL, cmd,
Tcl_NewStringObj("stderr", -1));
} else {
Tcl_ListObjAppendElement(NULL, cmd,
Tcl_NewStringObj("stdout", -1));
}
Tcl_ListObjAppendElement(NULL, cmd,
Tcl_NewStringObj(bytes, numBytes));
Tcl_DStringFree(&ds);
Tcl_IncrRefCount(cmd);
Tcl_GlobalEvalObj(consoleInterp, cmd);
Tcl_DecrRefCount(cmd);
}
}
return toWrite;
}
/*
*----------------------------------------------------------------------
*
* ConsoleInput --
*
* Read input from the console. Not currently implemented.
*
* Results:
* Always returns EOF.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
/* ARGSUSED */
static int
ConsoleInput(
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(
ClientData instanceData, /* Unused. */
Tcl_Interp *interp) /* Unused. */
{
ChannelData *data = instanceData;
ConsoleInfo *info = data->info;
if (info) {
if (--info->refCount <= 0) {
/*
* Assuming the Tcl_Interp * fields must already be NULL.
*/
ckfree(info);
}
}
ckfree(data);
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(
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(
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;
}
/*
*----------------------------------------------------------------------
*
* ConsoleObjCmd --
*
* The console command implements a Tcl interface to the various console
* options.
*
* Results:
* A standard Tcl result.
*
* Side effects:
* See the user documentation.
*
*----------------------------------------------------------------------
*/
static int
ConsoleObjCmd(
ClientData clientData, /* Access to the console interp */
Tcl_Interp *interp, /* Current interpreter */
int objc, /* Number of arguments */
Tcl_Obj *const objv[]) /* Argument objects */
{
int index, result;
static const char *const options[] = {
"eval", "hide", "show", "title", NULL};
enum option {CON_EVAL, CON_HIDE, CON_SHOW, CON_TITLE};
Tcl_Obj *cmd = NULL;
ConsoleInfo *info = clientData;
Tcl_Interp *consoleInterp = info->consoleInterp;
if (objc < 2) {
Tcl_WrongNumArgs(interp, 1, objv, "option ?arg?");
return TCL_ERROR;
}
if (Tcl_GetIndexFromObj(interp, objv[1], options, "option", 0, &index)
!= TCL_OK) {
return TCL_ERROR;
}
switch ((enum option) index) {
case CON_EVAL:
if (objc != 3) {
Tcl_WrongNumArgs(interp, 2, objv, "script");
return TCL_ERROR;
}
cmd = objv[2];
break;
case CON_HIDE:
if (objc != 2) {
Tcl_WrongNumArgs(interp, 2, objv, NULL);
return TCL_ERROR;
}
cmd = Tcl_NewStringObj("wm withdraw .", -1);
break;
case CON_SHOW:
if (objc != 2) {
Tcl_WrongNumArgs(interp, 2, objv, NULL);
return TCL_ERROR;
}
cmd = Tcl_NewStringObj("wm deiconify .", -1);
break;
case CON_TITLE:
if (objc > 3) {
Tcl_WrongNumArgs(interp, 2, objv, "?title?");
return TCL_ERROR;
}
cmd = Tcl_NewStringObj("wm title .", -1);
if (objc == 3) {
Tcl_ListObjAppendElement(NULL, cmd, objv[2]);
}
break;
default:
CLANG_ASSERT(0);
}
Tcl_IncrRefCount(cmd);
if (consoleInterp && !Tcl_InterpDeleted(consoleInterp)) {
Tcl_Preserve(consoleInterp);
result = Tcl_GlobalEvalObj(consoleInterp, cmd);
Tcl_SetReturnOptions(interp,
Tcl_GetReturnOptions(consoleInterp, result));
Tcl_SetObjResult(interp, Tcl_GetObjResult(consoleInterp));
Tcl_Release(consoleInterp);
} else {
Tcl_SetObjResult(interp, Tcl_NewStringObj(
"no active console interp", -1));
Tcl_SetErrorCode(interp, "TK", "CONSOLE", "NONE", NULL);
result = TCL_ERROR;
}
Tcl_DecrRefCount(cmd);
return result;
}
/*
*----------------------------------------------------------------------
*
* InterpreterObjCmd --
*
* This command allows the console interp to communicate with the main
* interpreter.
*
* Results:
* A standard Tcl result.
*
*----------------------------------------------------------------------
*/
static int
InterpreterObjCmd(
ClientData clientData, /* */
Tcl_Interp *interp, /* Current interpreter */
int objc, /* Number of arguments */
Tcl_Obj *const objv[]) /* Argument objects */
{
int index, result = TCL_OK;
static const char *const options[] = {"eval", "record", NULL};
enum option {OTHER_EVAL, OTHER_RECORD};
ConsoleInfo *info = clientData;
Tcl_Interp *otherInterp = info->interp;
if (objc < 2) {
Tcl_WrongNumArgs(interp, 1, objv, "option arg");
return TCL_ERROR;
}
if (Tcl_GetIndexFromObj(interp, objv[1], options, "option", 0, &index)
!= TCL_OK) {
return TCL_ERROR;
}
if (objc != 3) {
Tcl_WrongNumArgs(interp, 2, objv, "script");
return TCL_ERROR;
}
if ((otherInterp == NULL) || Tcl_InterpDeleted(otherInterp)) {
Tcl_SetObjResult(interp, Tcl_NewStringObj(
"no active master interp", -1));
Tcl_SetErrorCode(interp, "TK", "CONSOLE", "NO_INTERP", NULL);
return TCL_ERROR;
}
Tcl_Preserve(otherInterp);
switch ((enum option) index) {
case OTHER_EVAL:
result = Tcl_GlobalEvalObj(otherInterp, objv[2]);
/*
* TODO: Should exceptions be filtered here?
*/
Tcl_SetReturnOptions(interp,
Tcl_GetReturnOptions(otherInterp, result));
Tcl_SetObjResult(interp, Tcl_GetObjResult(otherInterp));
break;
case OTHER_RECORD:
Tcl_RecordAndEvalObj(otherInterp, objv[2], TCL_EVAL_GLOBAL);
/*
* By not setting result, we discard any exceptions or errors here and
* always return TCL_OK. All the caller wants is the interp result to
* display, whether that's result or error message.
*/
Tcl_SetObjResult(interp, Tcl_GetObjResult(otherInterp));
break;
}
Tcl_Release(otherInterp);
return result;
}
/*
*----------------------------------------------------------------------
*
* DeleteConsoleInterp --
*
* Thread exit handler to destroy a console interp when the thread it
* lives in gets torn down.
*
*----------------------------------------------------------------------
*/
static void
DeleteConsoleInterp(
ClientData clientData)
{
Tcl_Interp *interp = clientData;
Tcl_DeleteInterp(interp);
}
/*
*----------------------------------------------------------------------
*
* InterpDeleteProc --
*
* React when the interp in which the console is displayed is deleted for
* any reason.
*
* Results:
* None.
*
* Side effects:
* A new console it created.
*
*----------------------------------------------------------------------
*/
static void
InterpDeleteProc(
ClientData clientData,
Tcl_Interp *interp)
{
ConsoleInfo *info = clientData;
if (info->consoleInterp == interp) {
Tcl_DeleteThreadExitHandler(DeleteConsoleInterp, info->consoleInterp);
info->consoleInterp = NULL;
}
if (--info->refCount <= 0) {
ckfree(info);
}
}
/*
*----------------------------------------------------------------------
*
* 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.
*
*----------------------------------------------------------------------
*/
static void
ConsoleDeleteProc(
ClientData clientData)
{
ConsoleInfo *info = clientData;
if (info->consoleInterp) {
Tcl_DeleteInterp(info->consoleInterp);
}
if (--info->refCount <= 0) {
ckfree(info);
}
}
/*
*----------------------------------------------------------------------
*
* ConsoleEventProc --
*
* This event function 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 "::tk::ConsoleExit".
*
* Results:
* None.
*
* Side effects:
* Invokes the "::tk::ConsoleExit" command in the console interp.
*
*----------------------------------------------------------------------
*/
static void
ConsoleEventProc(
ClientData clientData,
XEvent *eventPtr)
{
if (eventPtr->type == DestroyNotify) {
ConsoleInfo *info = clientData;
Tcl_Interp *consoleInterp = info->consoleInterp;
if (consoleInterp && !Tcl_InterpDeleted(consoleInterp)) {
Tcl_GlobalEval(consoleInterp, "tk::ConsoleExit");
}
if (--info->refCount <= 0) {
ckfree(info);
}
}
}
/*
* Local Variables:
* mode: c
* c-basic-offset: 4
* fill-column: 78
* End:
*/
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