tkconfig.c

linux系统下的音频通信

		break;
	    case TK_CONFIG_CAP_STYLE:
		uid = valueIsUid ? (Tk_Uid) value : Tk_GetUid(value);
		if (Tk_GetCapStyle(interp, uid, (int *) ptr) != TCL_OK) {
		    return TCL_ERROR;
		}
		break;
	    case TK_CONFIG_JOIN_STYLE:
		uid = valueIsUid ? (Tk_Uid) value : Tk_GetUid(value);
		if (Tk_GetJoinStyle(interp, uid, (int *) ptr) != TCL_OK) {
		    return TCL_ERROR;
		}
		break;
	    case TK_CONFIG_PIXELS:
		if (Tk_GetPixels(interp, tkwin, value, (int *) ptr)
			!= TCL_OK) {
		    return TCL_ERROR;
		}
		break;
	    case TK_CONFIG_MM:
		if (Tk_GetScreenMM(interp, tkwin, value, (double *) ptr)
			!= TCL_OK) {
		    return TCL_ERROR;
		}
		break;
	    case TK_CONFIG_WINDOW: {
		Tk_Window tkwin2;

		if (nullValue) {
		    tkwin2 = NULL;
		} else {
		    tkwin2 = Tk_NameToWindow(interp, value, tkwin);
		    if (tkwin2 == NULL) {
			return TCL_ERROR;
		    }
		}
		*((Tk_Window *) ptr) = tkwin2;
		break;
	    }
	    case TK_CONFIG_CUSTOM:
		if ((*specPtr->customPtr->parseProc)(
			specPtr->customPtr->clientData, interp, tkwin,
			value, widgRec, specPtr->offset) != TCL_OK) {
		    return TCL_ERROR;
		}
		break;
	    default: {
		sprintf(interp->result, "bad config table: unknown type %d",
			specPtr->type);
		return TCL_ERROR;
	    }
	}
	specPtr++;
    } while ((specPtr->argvName == NULL) && (specPtr->type != TK_CONFIG_END));
    return TCL_OK;
}

/*
 *--------------------------------------------------------------
 *
 * Tk_ConfigureInfo --
 *
 *	Return information about the configuration options
 *	for a window, and their current values.
 *
 * Results:
 *	Always returns TCL_OK.  Interp->result will be modified
 *	hold a description of either a single configuration option
 *	available for "widgRec" via "specs", or all the configuration
 *	options available.  In the "all" case, the result will
 *	available for "widgRec" via "specs".  The result will
 *	be a list, each of whose entries describes one option.
 *	Each entry will itself be a list containing the option's
 *	name for use on command lines, database name, database
 *	class, default value, and current value (empty string
 *	if none).  For options that are synonyms, the list will
 *	contain only two values:  name and synonym name.  If the
 *	"name" argument is non-NULL, then the only information
 *	returned is that for the named argument (i.e. the corresponding
 *	entry in the overall list is returned).
 *
 * Side effects:
 *	None.
 *
 *--------------------------------------------------------------
 */

int
Tk_ConfigureInfo(interp, tkwin, specs, widgRec, argvName, flags)
    Tcl_Interp *interp;		/* Interpreter for error reporting. */
    Tk_Window tkwin;		/* Window corresponding to widgRec. */
    Tk_ConfigSpec *specs;	/* Describes legal options. */
    char *widgRec;		/* Record whose fields contain current
				 * values for options. */
    char *argvName;		/* If non-NULL, indicates a single option
				 * whose info is to be returned.  Otherwise
				 * info is returned for all options. */
    int flags;			/* Used to specify additional flags
				 * that must be present in config specs
				 * for them to be considered. */
{
    register Tk_ConfigSpec *specPtr;
    int needFlags, hateFlags;
    char *list;
    char *leader = "{";

    needFlags = flags & ~(TK_CONFIG_USER_BIT - 1);
    if (Tk_Depth(tkwin) <= 1) {
	hateFlags = TK_CONFIG_COLOR_ONLY;
    } else {
	hateFlags = TK_CONFIG_MONO_ONLY;
    }

    /*
     * If information is only wanted for a single configuration
     * spec, then handle that one spec specially.
     */

    Tcl_SetResult(interp, (char *) NULL, TCL_STATIC);
    if (argvName != NULL) {
	specPtr = FindConfigSpec(interp, specs, argvName, needFlags,
		hateFlags);
	if (specPtr == NULL) {
	    return TCL_ERROR;
	}
	interp->result = FormatConfigInfo(interp, tkwin, specPtr, widgRec);
	interp->freeProc = TCL_DYNAMIC;
	return TCL_OK;
    }

    /*
     * Loop through all the specs, creating a big list with all
     * their information.
     */

    for (specPtr = specs; specPtr->type != TK_CONFIG_END; specPtr++) {
	if ((argvName != NULL) && (specPtr->argvName != argvName)) {
	    continue;
	}
	if (((specPtr->specFlags & needFlags) != needFlags)
		|| (specPtr->specFlags & hateFlags)) {
	    continue;
	}
	if (specPtr->argvName == NULL) {
	    continue;
	}
	list = FormatConfigInfo(interp, tkwin, specPtr, widgRec);
	Tcl_AppendResult(interp, leader, list, "}", (char *) NULL);
	ckfree(list);
	leader = " {";
    }
    return TCL_OK;
}

/*
 *--------------------------------------------------------------
 *
 * FormatConfigInfo --
 *
 *	Create a valid Tcl list holding the configuration information
 *	for a single configuration option.
 *
 * Results:
 *	A Tcl list, dynamically allocated.  The caller is expected to
 *	arrange for this list to be freed eventually.
 *
 * Side effects:
 *	Memory is allocated.
 *
 *--------------------------------------------------------------
 */

static char *
FormatConfigInfo(interp, tkwin, specPtr, widgRec)
    Tcl_Interp *interp;			/* Interpreter to use for things
					 * like floating-point precision. */
    Tk_Window tkwin;			/* Window corresponding to widget. */
    register Tk_ConfigSpec *specPtr;	/* Pointer to information describing
					 * option. */
    char *widgRec;			/* Pointer to record holding current
					 * values of info for widget. */
{
    char *argv[6], *result;
    char buffer[200];
    Tcl_FreeProc *freeProc = (Tcl_FreeProc *) NULL;

    argv[0] = specPtr->argvName;
    argv[1] = specPtr->dbName;
    argv[2] = specPtr->dbClass;
    argv[3] = specPtr->defValue;
    if (specPtr->type == TK_CONFIG_SYNONYM) {
	return Tcl_Merge(2, argv);
    }
    argv[4] = FormatConfigValue(interp, tkwin, specPtr, widgRec, buffer,
	    &freeProc);
    if (argv[1] == NULL) {
	argv[1] = "";
    }
    if (argv[2] == NULL) {
	argv[2] = "";
    }
    if (argv[3] == NULL) {
	argv[3] = "";
    }
    if (argv[4] == NULL) {
	argv[4] = "";
    }
    result = Tcl_Merge(5, argv);
    if (freeProc != NULL) {
	if ((freeProc == TCL_DYNAMIC) || (freeProc == (Tcl_FreeProc *) free)) {
	    ckfree(argv[4]);
	} else {
	    (*freeProc)(argv[4]);
	}
    }
    return result;
}

/*
 *----------------------------------------------------------------------
 *
 * FormatConfigValue --
 *
 *	This procedure formats the current value of a configuration
 *	option.
 *
 * Results:
 *	The return value is the formatted value of the option given
 *	by specPtr and widgRec.  If the value is static, so that it
 *	need not be freed, *freeProcPtr will be set to NULL;  otherwise
 *	*freeProcPtr will be set to the address of a procedure to
 *	free the result, and the caller must invoke this procedure
 *	when it is finished with the result.
 *
 * Side effects:
 *	None.
 *
 *----------------------------------------------------------------------
 */

static char *
FormatConfigValue(interp, tkwin, specPtr, widgRec, buffer, freeProcPtr)
    Tcl_Interp *interp;		/* Interpreter for use in real conversions. */
    Tk_Window tkwin;		/* Window corresponding to widget. */
    Tk_ConfigSpec *specPtr;	/* Pointer to information describing option.
				 * Must not point to a synonym option. */
    char *widgRec;		/* Pointer to record holding current
				 * values of info for widget. */
    char *buffer;		/* Static buffer to use for small values.
				 * Must have at least 200 bytes of storage. */
    Tcl_FreeProc **freeProcPtr;	/* Pointer to word to fill in with address
				 * of procedure to free the result, or NULL
				 * if result is static. */
{
    char *ptr, *result;

    *freeProcPtr = NULL;
    ptr = widgRec + specPtr->offset;
    result = "";
    switch (specPtr->type) {
	case TK_CONFIG_BOOLEAN:
	    if (*((int *) ptr) == 0) {
		result = "0";
	    } else {
		result = "1";
	    }
	    break;
	case TK_CONFIG_INT:
	    sprintf(buffer, "%d", *((int *) ptr));
	    result = buffer;
	    break;
	case TK_CONFIG_DOUBLE:
	    Tcl_PrintDouble(interp, *((double *) ptr), buffer);
	    result = buffer;
	    break;
	case TK_CONFIG_STRING:
	    result = (*(char **) ptr);
	    if (result == NULL) {
		result = "";
	    }
	    break;
	case TK_CONFIG_UID: {
	    Tk_Uid uid = *((Tk_Uid *) ptr);
	    if (uid != NULL) {
		result = uid;
	    }
	    break;
	}
	case TK_CONFIG_COLOR: {
	    XColor *colorPtr = *((XColor **) ptr);
	    if (colorPtr != NULL) {
		result = Tk_NameOfColor(colorPtr);
	    }
	    break;
	}
	case TK_CONFIG_FONT: {
	    Tk_Font tkfont = *((Tk_Font *) ptr);
	    if (tkfont != NULL) {
		result = Tk_NameOfFont(tkfont);
	    }
	    break;
	}
	case TK_CONFIG_BITMAP: {
	    Pixmap pixmap = *((Pixmap *) ptr);
	    if (pixmap != None) {
		result = Tk_NameOfBitmap(Tk_Display(tkwin), pixmap);
	    }
	    break;
	}
	case TK_CONFIG_BORDER: {
	    Tk_3DBorder border = *((Tk_3DBorder *) ptr);
	    if (border != NULL) {
		result = Tk_NameOf3DBorder(border);
	    }
	    break;
	}
	case TK_CONFIG_RELIEF:
	    result = Tk_NameOfRelief(*((int *) ptr));
	    break;
	case TK_CONFIG_CURSOR:
	case TK_CONFIG_ACTIVE_CURSOR: {
	    Tk_Cursor cursor = *((Tk_Cursor *) ptr);
	    if (cursor != None) {
		result = Tk_NameOfCursor(Tk_Display(tkwin), cursor);
	    }
	    break;
	}
	case TK_CONFIG_JUSTIFY:
	    result = Tk_NameOfJustify(*((Tk_Justify *) ptr));
	    break;
	case TK_CONFIG_ANCHOR:
	    result = Tk_NameOfAnchor(*((Tk_Anchor *) ptr));
	    break;
	case TK_CONFIG_CAP_STYLE:
	    result = Tk_NameOfCapStyle(*((int *) ptr));
	    break;
	case TK_CONFIG_JOIN_STYLE:
	    result = Tk_NameOfJoinStyle(*((int *) ptr));
	    break;
	case TK_CONFIG_PIXELS:
	    sprintf(buffer, "%d", *((int *) ptr));
	    result = buffer;
	    break;
	case TK_CONFIG_MM:
	    Tcl_PrintDouble(interp, *((double *) ptr), buffer);
	    result = buffer;
	    break;
	case TK_CONFIG_WINDOW: {
	    Tk_Window tkwin;

	    tkwin = *((Tk_Window *) ptr);
	    if (tkwin != NULL) {
		result = Tk_PathName(tkwin);
	    }
	    break;
	}
	case TK_CONFIG_CUSTOM:
	    result = (*specPtr->customPtr->printProc)(
		    specPtr->customPtr->clientData, tkwin, widgRec,
		    specPtr->offset, freeProcPtr);
	    break;
	default: 
	    result = "?? unknown type ??";
    }
    return result;
}

/*
 *----------------------------------------------------------------------
 *
 * Tk_ConfigureValue --
 *
 *	This procedure returns the current value of a configuration
 *	option for a widget.
 *
 * Results:
 *	The return value is a standard Tcl completion code (TCL_OK or
 *	TCL_ERROR).  Interp->result will be set to hold either the value
 *	of the option given by argvName (if TCL_OK is returned) or
 *	an error message (if TCL_ERROR is returned).
 *
 * Side effects:
 *	None.
 *
 *----------------------------------------------------------------------
 */

int
Tk_ConfigureValue(interp, tkwin, specs, widgRec, argvName, flags)
    Tcl_Interp *interp;		/* Interpreter for error reporting. */
    Tk_Window tkwin;		/* Window corresponding to widgRec. */
    Tk_ConfigSpec *specs;	/* Describes legal options. */
    char *widgRec;		/* Record whose fields contain current
				 * values for options. */
    char *argvName;		/* Gives the command-line name for the
				 * option whose value is to be returned. */
    int flags;			/* Used to specify additional flags
				 * that must be present in config specs
				 * for them to be considered. */
{
    Tk_ConfigSpec *specPtr;
    int needFlags, hateFlags;

    needFlags = flags & ~(TK_CONFIG_USER_BIT - 1);
    if (Tk_Depth(tkwin) <= 1) {
	hateFlags = TK_CONFIG_COLOR_ONLY;
    } else {
	hateFlags = TK_CONFIG_MONO_ONLY;
    }
    specPtr = FindConfigSpec(interp, specs, argvName, needFlags, hateFlags);
    if (specPtr == NULL) {
	return TCL_ERROR;
    }
    interp->result = FormatConfigValue(interp, tkwin, specPtr, widgRec,
	    interp->result, &interp->freeProc);
    return TCL_OK;
}

/*
 *----------------------------------------------------------------------
 *
 * Tk_FreeOptions --
 *
 *	Free up all resources associated with configuration options.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Any resource in widgRec that is controlled by a configuration
 *	option (e.g. a Tk_3DBorder or XColor) is freed in the appropriate
 *	fashion.
 *
 *----------------------------------------------------------------------
 */

	/* ARGSUSED */
void
Tk_FreeOptions(specs, widgRec, display, needFlags)
    Tk_ConfigSpec *specs;	/* Describes legal options. */
    char *widgRec;		/* Record whose fields contain current
				 * values for options. */
    Display *display;		/* X display; needed for freeing some
				 * resources. */
    int needFlags;		/* Used to specify additional flags
				 * that must be present in config specs
				 * for them to be considered. */
{
    register Tk_ConfigSpec *specPtr;
    char *ptr;

    for (specPtr = specs; specPtr->type != TK_CONFIG_END; specPtr++) {
	if ((specPtr->specFlags & needFlags) != needFlags) {
	    continue;
	}
	ptr = widgRec + specPtr->offset;
	switch (specPtr->type) {
	    case TK_CONFIG_STRING:
		if (*((char **) ptr) != NULL) {
		    ckfree(*((char **) ptr));
		    *((char **) ptr) = NULL;
		}
		break;
	    case TK_CONFIG_COLOR:
		if (*((XColor **) ptr) != NULL) {
		    Tk_FreeColor(*((XColor **) ptr));
		    *((XColor **) ptr) = NULL;
		}
		break;
	    case TK_CONFIG_FONT:
		Tk_FreeFont(*((Tk_Font *) ptr));
		*((Tk_Font *) ptr) = NULL;
		break;
	    case TK_CONFIG_BITMAP:
		if (*((Pixmap *) ptr) != None) {
		    Tk_FreeBitmap(display, *((Pixmap *) ptr));
		    *((Pixmap *) ptr) = None;
		}
		break;
	    case TK_CONFIG_BORDER:
		if (*((Tk_3DBorder *) ptr) != NULL) {
		    Tk_Free3DBorder(*((Tk_3DBorder *) ptr));
		    *((Tk_3DBorder *) ptr) = NULL;
		}
		break;
	    case TK_CONFIG_CURSOR:
	    case TK_CONFIG_ACTIVE_CURSOR:
		if (*((Tk_Cursor *) ptr) != None) {
		    Tk_FreeCursor(display, *((Tk_Cursor *) ptr));
		    *((Tk_Cursor *) ptr) = None;
		}
	}
    }
}