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authorWilliam Joye <wjoye@cfa.harvard.edu>2016-12-21 22:56:39 (GMT)
committerWilliam Joye <wjoye@cfa.harvard.edu>2016-12-21 22:56:39 (GMT)
commit2bc8acacaa385fe4e607a99569b502032f98bc64 (patch)
tree7e70af1addc0d893b8daf4339f277cbf939998d8 /tk8.6/generic/tkConsole.c
parentd1a6de55efc90f190dee42ab8c4fa9070834e77d (diff)
parent1741f1b6324ead16eb1eeaa16e1f18cf0a2abb4f (diff)
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Merge commit '1741f1b6324ead16eb1eeaa16e1f18cf0a2abb4f' as 'tk8.6'
Diffstat (limited to 'tk8.6/generic/tkConsole.c')
-rw-r--r--tk8.6/generic/tkConsole.c964
1 files changed, 964 insertions, 0 deletions
diff --git a/tk8.6/generic/tkConsole.c b/tk8.6/generic/tkConsole.c
new file mode 100644
index 0000000..8bfbe9b
--- /dev/null
+++ b/tk8.6/generic/tkConsole.c
@@ -0,0 +1,964 @@
+/*
+ * 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.
+ */
+
+ if (Tcl_InitStubs(interp, "8.6", 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_EvalEx(consoleInterp, "source $tk_library/console.tcl",
+ -1, TCL_EVAL_GLOBAL);
+ 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_EvalObjEx(consoleInterp, cmd, TCL_EVAL_GLOBAL);
+ 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_GetIndexFromObjStruct(interp, objv[1], options,
+ sizeof(char *), "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_EvalObjEx(consoleInterp, cmd, TCL_EVAL_GLOBAL);
+ 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_GetIndexFromObjStruct(interp, objv[1], options,
+ sizeof(char *), "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_EvalObjEx(otherInterp, objv[2], TCL_EVAL_GLOBAL);
+
+ /*
+ * 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_EvalEx(consoleInterp, "tk::ConsoleExit", -1, TCL_EVAL_GLOBAL);
+ }
+
+ if (--info->refCount <= 0) {
+ ckfree(info);
+ }
+ }
+}
+
+/*
+ * Local Variables:
+ * mode: c
+ * c-basic-offset: 4
+ * fill-column: 78
+ * End:
+ */