Tk Source Code

	    [type isEqualToString:NSStringPboardType]) {
	for (TkClipboardTarget *targetPtr = dispPtr->clipTargetPtr; targetPtr;
		targetPtr = targetPtr->nextPtr) {
	    if (targetPtr->type == XA_STRING ||
		    targetPtr->type == dispPtr->utf8Atom) {
		for (TkClipboardBuffer *cbPtr = targetPtr->firstBufferPtr;
			cbPtr; cbPtr = cbPtr->nextPtr) {
		    NSString *s = TclUniToNSString(cbPtr->buffer, cbPtr->length);
		    [string appendString:s];
		    [s release];
		}
		break;
	    }
	}
    }

	     * Encode the string using the encoding which is used in Tcl
	     * when TCL_UTF_MAX = 3.  This replaces each UTF-16 surrogate with
	     * a 3-byte sequence generated using the UTF-8 algorithm. (Even
	     * though UTF-8 does not allow encoding surrogates, the algorithm
	     * does produce a 3-byte sequence.)
	     */

	    char *bytes = NSStringToTclUni(string, NULL);
	    result = proc(clientData, interp, bytes);
	    if (bytes) {
		ckfree(bytes);
	    }
	}
    } else {
	Tcl_SetObjResult(interp, Tcl_ObjPrintf(

#pragma mark -
#pragma mark Font Helpers:

/*
 *---------------------------------------------------------------------------
 *
 * TclUniToNSString --
 *
 * When Tcl is compiled with TCL_UTF_MAX = 3 (the default for 8.6) it cannot
 * deal directly with UTF-8 encoded non-BMP characters, since their UTF-8
 * encoding requires 4 bytes.
 *
 * As a workaround, these versions of Tcl encode non-BMP characters as a string
 * of length 6 in which the high and low UTF-16 surrogates have been encoded

 *
 * Side effects:
 *	None.
 *---------------------------------------------------------------------------
 */

MODULE_SCOPE NSString*
TclUniToNSString(
   const char *source,
   int numBytes)
{
    NSString *string = [[NSString alloc] initWithBytesNoCopy:(void *)source
						      length:numBytes
						    encoding:NSUTF8StringEncoding
						freeWhenDone:NO];
    if (!string) {
	const unichar *characters = ckalloc(numBytes*sizeof(unichar));
	const char *in = source;
	unichar *out = (unichar *) characters;
	while (in < source + numBytes) {
	    in += Tcl_UtfToUniChar(in, out++);
	}


	string = [[NSString alloc] initWithCharacters:characters
		     length:(out - characters)];
	ckfree(characters);
    }
    return string;
}

/*
 *---------------------------------------------------------------------------
 *
 * TclUniAtIndex --
 *
 *  Write a sequence of bytes up to length 6 which is an encoding of a UTF-16
 *  character in an NSString.  Also record the unicode code point of the character.
 *  this may be a non-BMP character constructed by reading two surrogates from
 *  the NSString.
 *
 * Results:
 *	Returns the number of bytes written.
 *
 * Side effects:
 *	Bytes are written to the char array referenced by the pointer uni and
 *      the unicode code point is written to the integer referenced by the
 *      pointer code.
 *
 */

MODULE_SCOPE int
TclUniAtIndex(
    NSString *string,
    int index,
    char *uni,
    unsigned int *code)
{
    char *ptr = uni;
    UniChar uniChar = [string characterAtIndex: index];

	return strlen(uni);
    }
}

/*
 *---------------------------------------------------------------------------
 *
 * NSStringToTclUni --
 *
 * Encodes the unicode string represented by an NSString object with the
 * internal encoding that Tcl uses when TCL_UTF_MAX = 3.  This encoding
 * is similar to UTF-8 except that non-BMP characters are encoded as two
 * successive 3-byte sequences which are constructed from UTF-16 surrogates
 * by applying the UTF-8 algorithm.  Even though the UTF-8 encoding does not
 * allow encoding surrogates, the algorithm does produce a well-defined
 * 3-byte sequence.
 *
 * Results:
 *	Returns a pointer to a null-terminated byte array which encodes the
 *	NSString.
 *
 * Side effects:
 *      Memory is allocated to hold the byte array, which must be freed with
 *      ckalloc.  If the pointer numBytes is not NULL the number of non-null
 *      bytes written to the array is stored in the integer it references.
 */

MODULE_SCOPE char*
NSStringToTclUni(
   NSString *string,
   int *numBytes)
{
    unsigned int code;
    int i;
    char *ptr, *bytes = ckalloc(6*[string length] + 1);

    ptr = bytes;
    if (ptr) {
	for (i = 0; i < [string length]; i++) {
	    ptr += TclUniAtIndex(string, i, ptr, &code);
	    if (code > 0xffff){
		i++;
	    }
	}
	*ptr = '\0';
    }
    if (numBytes) {

	    (maxLength == 0 && !(flags & TK_AT_LEAST_ONE))) {
	*lengthPtr = 0;
	return 0;
    }
    if (maxLength > 32767) {
	maxLength = 32767;
    }
    string = TclUniToNSString((const char *)source, numBytes);
    if (!string) {
	length = 0;
	fit = rangeLength;
	goto done;
    }
    attributedString = [[NSAttributedString alloc] initWithString:string
	    attributes:fontPtr->nsAttributes];

    int h;

    if (rangeStart < 0 || rangeLength <= 0 ||
	    rangeStart + rangeLength > numBytes ||
	    !TkMacOSXSetupDrawingContext(drawable, gc, 1, &drawingContext)) {
	return;
    }
    string = TclUniToNSString((const char *)source, numBytes);
    if (!string) {
	return;
    }
    context = drawingContext.context;
    fg = TkMacOSXCreateCGColor(gc, gc->foreground);
    attributes = [fontPtr->nsAttributes mutableCopy];
    [attributes setObject:(id)fg forKey:(id)kCTForegroundColorAttributeName];

     * sequence using the UTF-8 algorithm (ignoring the fact that the UTF-8
     * encoding specification does not allow encoding UTF-16 surrogates).
     * This gives a 6-byte encoding of the non-BMP character which we write into
     * the trans_chars field of the XEvent.
     */

    for (i = 0; i < len; i++) {
	xEvent.xkey.nbytes = TclUniAtIndex(str, i, xEvent.xkey.trans_chars,
					   &xEvent.xkey.keycode);
	if (xEvent.xkey.keycode > 0xffff){
	    i++;
	}
    	xEvent.xany.type = KeyPress;
    	Tk_QueueWindowEvent(&xEvent, TCL_QUEUE_TAIL);
    }

MODULE_SCOPE long tkMacOSXMacOSXVersion;

/*
 * Prototypes for TkMacOSXRegion.c.
 */

#if 0
MODULE_SCOPE void	TkMacOSXEmtpyRegion(TkRegion r);
MODULE_SCOPE int	TkMacOSXIsEmptyRegion(TkRegion r);
#endif
MODULE_SCOPE HIShapeRef	TkMacOSXGetNativeRegion(TkRegion r);
MODULE_SCOPE void	TkMacOSXSetWithNativeRegion(TkRegion r,
			    HIShapeRef rgn);
MODULE_SCOPE void	TkMacOSXOffsetRegion(TkRegion r, short dx, short dy);
MODULE_SCOPE HIShapeRef	TkMacOSXHIShapeCreateEmpty(void);
MODULE_SCOPE HIMutableShapeRef TkMacOSXHIShapeCreateMutableWithRect(
			    const CGRect *inRect);

			    Tcl_Obj *const objv[]);
MODULE_SCOPE void       TkMacOSXDrawSolidBorder(Tk_Window tkwin, GC gc,
			    int inset, int thickness);
MODULE_SCOPE int 	TkMacOSXServices_Init(Tcl_Interp *interp);
MODULE_SCOPE int	TkMacOSXRegisterServiceWidgetObjCmd(ClientData clientData,
			    Tcl_Interp *interp, int objc,
			    Tcl_Obj *const objv[]);
MODULE_SCOPE NSString*  TclUniToNSString(const char *source, int numBytes);
MODULE_SCOPE int        TclUniAtIndex(NSString *string, int index, char *uni,
				      unsigned int *code);
MODULE_SCOPE char*      NSStringToTclUni(NSString *string, int *numBytes);

#pragma mark Private Objective-C Classes

#define VISIBILITY_HIDDEN __attribute__((visibility("hidden")))

enum { tkMainMenu = 1, tkApplicationMenu, tkWindowsMenu, tkHelpMenu};

 *
 * Side effects:
 *	None.
 *
 *----------------------------------------------------------------------
 */

int
TkMacOSXIsEmptyRegion(
    TkRegion r)
{
    return HIShapeIsEmpty((HIMutableShapeRef) r) ? 1 : 0;
}

/*