Tk Source Code

    /*
     * If we're displaying a special character instead of the value of the
     * entry, recompute the displayString.
     */

    if (entryPtr->showChar != NULL) {
	int ch;
	char buf[4];
	int size;

	/*
	 * Normalize the special character so we can safely duplicate it in
	 * the display string. If we didn't do this, then two malformed
	 * characters might end up looking like one valid UTF character in the
	 * resulting string.

 *
 *---------------------------------------------------------------------------
 */

size_t
TkUtfToUniChar(
    const char *src,	/* The UTF-8 string. */
    int *chPtr)		/* Filled with the Unicode value represented by
			 * the UTF-8 string. */
{
    Tcl_UniChar uniChar = 0;

    size_t len = Tcl_UtfToUniChar(src, &uniChar);
    if ((uniChar & 0xFC00) == 0xD800) {
	Tcl_UniChar low = uniChar;
	/* This can only happen if Tcl is compiled with TCL_UTF_MAX=4,
	 * or when a high surrogate character is detected in UTF-8 form */
	size_t len2 = Tcl_UtfToUniChar(src+len, &low);
	if ((uniChar & 0xFC00) == 0xDC00) {
	    *chPtr = (((uniChar & 0x3FF) << 10) | (low & 0x3FF)) + 0x10000;
	    return len + len2;


	}


    }
    *chPtr = uniChar;
    return len;
}

/*
 *---------------------------------------------------------------------------
 *
 * TkUniCharToUtf --

 *	None.
 *
 *---------------------------------------------------------------------------
 */

size_t TkUniCharToUtf(int ch, char *buf)
{

    if (((unsigned)(ch - 0x10000) <= 0xFFFFF)) {

	/* Spit out a 4-byte UTF-8 character */
	*buf++ = (char) ((ch >> 18) | 0xF0);
	*buf++ = (char) (((ch >> 12) | 0x80) & 0xBF);
	*buf++ = (char) (((ch >> 6) | 0x80) & 0xBF);
	*buf = (char) ((ch | 0x80) & 0xBF);
	return 4;
    } else {
	return Tcl_UniCharToUtf(ch, buf);
    }

}


#endif

#if TCL_MAJOR_VERSION > 8
unsigned char *

 * 	Used to compute the displayString if -show is non-NULL.
 */
static char *EntryDisplayString(const char *showChar, int numChars)
{
    char *displayString, *p;
    int size;
    int ch;
    char buf[4];

    TkUtfToUniChar(showChar, &ch);
    size = TkUniCharToUtf(ch, buf);
    p = displayString = ckalloc(numChars * size + 1);

    while (numChars--) {
	memcpy(p, buf, size);

    # Using standard text characters
    addSample $w Arabic \
	    "\u0627\u0644\u0643\u0644\u0645\u0629 " \
	    "\u0627\u0644\u0639\u0631\u0628\u064A\u0629"
}
addSample $w "Trad. Chinese"  "\u4E2D\u570B\u7684\u6F22\u5B57"
addSample $w "Simpl. Chinese" "\u6C49\u8BED"
addSample $w French "Langue fran\xE7aise"
addSample $w Greek \
	"\u0395\u03BB\u03BB\u03B7\u03BD\u03B9\u03BA\u03AE " \
	"\u03B3\u03BB\u03CE\u03C3\u03C3\u03B1"
if {[usePresentationFormsFor Hebrew]} {
    # Visual order (pre-layouted)
    addSample $w Hebrew \
	    "\u05EA\u05D9\u05E8\u05D1\u05E2 \u05D1\u05EA\u05DB"
} else {
    # Standard logical order
    addSample $w Hebrew \
	    "\u05DB\u05EA\u05D1 \u05E2\u05D1\u05E8\u05D9\u05EA"
}
addSample $w Hindi \
    "\u0939\u093F\u0928\u094D\u0926\u0940 \u092D\u093E\u0937\u093E"
addSample $w Icelandic "\xCDslenska"
addSample $w Japanese \
	"\u65E5\u672C\u8A9E\u306E\u3072\u3089\u304C\u306A, " \
	"\u6F22\u5B57\u3068\u30AB\u30BF\u30AB\u30CA"
addSample $w Korean "\uB300\uD55C\uBBFC\uAD6D\uC758 \uD55C\uAE00"
addSample $w Russian \
	"\u0420\u0443\u0441\u0441\u043A\u0438\u0439 \u044F\u0437\u044B\u043A"
if {([tk windowingsystem] ne "x11") || (![catch {tk::pkgconfig get fontsystem} fs] && ($fs eq "xft"))} {
    if {[package vsatisfies [package provide Tcl] 8.7-]} {
	addSample $w Emoji \
		"\U1F600\U1F4A9\U1F44D\U1F1F3\U1F1F1"
    } else {
	addSample $w Emoji \
		"\uD83D\uDE00\uD83D\uDCA9\uD83D\uDC4D\uD83C\uDDF3\uD83C\uDDF1"
    }
}

## We're done processing, so change things back to normal running...
destroy $w.wait
$w conf -cursor $oldCursor

 *
 * See the file "license.terms" for information on usage and redistribution of
 * this file, and for a DISCLAIMER OF ALL WARRANTIES.
 */

#include "tkUnixInt.h"
#include "tkFont.h"



/*
 * The preferred font encodings.
 */

static const char encodingList[][10] = {
    "iso8859-1", "jis0208", "jis0212"

				 * stored in the output buffer as a result of
				 * the conversion. */
    int *dstCharsPtr)		/* Filled with the number of characters that
				 * correspond to the bytes stored in the
				 * output buffer. */
{
    const char *srcStart, *srcEnd;
    const char *dstEnd, *dstStart;
    int result, numChars, charLimit = INT_MAX;
    unsigned short ch;

    if (flags & TCL_ENCODING_CHAR_LIMIT) {
	charLimit = *dstCharsPtr;
    }
    result = TCL_OK;

    /* check alignment with ucs-2 (2 == sizeof(UCS-2)) */
    if ((srcLen % 2) != 0) {
	result = TCL_CONVERT_MULTIBYTE;
	srcLen--;
    }
    /* If last code point is a high surrogate, we cannot handle that yet */
    if ((srcLen >= 2) && ((src[srcLen - 2] & 0xFC) == 0xD8)) {
	result = TCL_CONVERT_MULTIBYTE;
	srcLen -= 2;
    }

    srcStart = src;
    srcEnd = src + srcLen;

    dstStart = dst;
    dstEnd = dst + dstLen - 4;

    for (numChars = 0; src < srcEnd && numChars <= charLimit; numChars++) {
	if (dst > dstEnd) {
	    result = TCL_CONVERT_NOSPACE;
	    break;
	}

	ch = (src[0] & 0xFF) << 8 | (src[1] & 0xFF);
	src += 2 /* sizeof(UTF-16) */;

	/*


	 * Special case for 1-byte utf chars for speed. Make sure we work with
	 * unsigned short-size data.
	 */
	if (ch && ch < 0x80) {
	    *dst++ = (ch & 0xFF);
	} else {
	    dst += Tcl_UniCharToUtf(ch, dst);

	}
    }

    *srcReadPtr = src - srcStart;
    *dstWrotePtr = dst - dstStart;
    *dstCharsPtr = numChars;
    return result;
}

				 * the conversion. */
    int *dstCharsPtr)		/* Filled with the number of characters that
				 * correspond to the bytes stored in the
				 * output buffer. */
{
    const char *srcStart, *srcEnd, *srcClose, *dstStart, *dstEnd;
    int result, numChars;

    int ch;




    srcStart = src;
    srcEnd = src + srcLen;
    srcClose = srcEnd;
    if (!(flags & TCL_ENCODING_END)) {
	srcClose -= 6;
    }

    dstStart = dst;
    dstEnd = dst + dstLen - 2 /* sizeof(UCS-2) */;

    result = TCL_OK;
    for (numChars = 0; src < srcEnd; numChars++) {
	if ((src > srcClose) && (!Tcl_UtfCharComplete(src, srcEnd - src))) {
	    /*
	     * If there is more string to follow, this will ensure that the
	     * last UTF-8 character in the source buffer hasn't been cut off.
	     */
	    result = TCL_CONVERT_MULTIBYTE;
	    break;
	}
	if (dst > dstEnd) {
	    result = TCL_CONVERT_NOSPACE;
	    break;
	}
	src += TkUtfToUniChar(src, &ch);

	/*
	 * Ensure big-endianness (store big bits first).


	 */


	*dst++ = (char)(ch >> 8);
	*dst++ = (char)ch;
    }
    *srcReadPtr = src - srcStart;
    *dstWrotePtr = dst - dstStart;
    *dstCharsPtr = numChars;
    return result;
}


    SubFont *subFontPtr,	/* Contains font mapping cache to be
				 * updated. */
    int row)			/* Index of the page to be loaded into the
				 * cache. */
{
    FontFamily *familyPtr;
    Tcl_Encoding encoding;
    int i, j, bitOffset, end, segCount;
    USHORT *startCount, *endCount;
    char buf[16], src[4];

    subFontPtr->fontMap[row] = ckalloc(FONTMAP_BITSPERPAGE / 8);
    memset(subFontPtr->fontMap[row], 0, FONTMAP_BITSPERPAGE / 8);

    familyPtr = subFontPtr->familyPtr;
    encoding = familyPtr->encoding;

    TkWindow *winPtr,		/* Window where event occurred: needed to get
				 * input context. */
    XEvent *eventPtr,		/* X keyboard event. */
    Tcl_DString *dsPtr)		/* Uninitialized or empty string to hold
				 * result. */
{
    XKeyEvent *keyEv = &eventPtr->xkey;

    int len;
    char buf[4];

    Tcl_DStringInit(dsPtr);
    if (keyEv->send_event == -1) {
	if (keyEv->nbytes > 0) {
	    Tcl_ExternalToUtfDString(TkWinGetKeyInputEncoding(),
		    keyEv->trans_chars, keyEv->nbytes, dsPtr);
	}

    INPUT input;
    int xscreen = (int)(GetSystemMetrics(SM_CXSCREEN) - 1);
    int yscreen = (int)(GetSystemMetrics(SM_CYSCREEN) - 1);

    input.type = INPUT_MOUSE;
    input.mi.dx = (x * 65535 + xscreen/2) / xscreen;
    input.mi.dy = (y * 65535 + yscreen/2) / yscreen;

    /*
     * Horrible workaround here. There is a bug on Win 10: when warping to
     * pixel (x = 0, y = 0) the SendInput() below just does not move the
     * mouse pointer. However, as soon as dx or dy is non zero it moves as
     * expected. Given the scaling factor of 65535 (see above),
     * (dx = 1 , dy = 0) still means pixel (x = 0, y = 0).
     * See ticket [69b48f427e].
     */
    if (input.mi.dx == 0 && input.mi.dy == 0) {
        input.mi.dx = 1;
    }

    input.mi.mouseData = 0;
    input.mi.dwFlags = MOUSEEVENTF_ABSOLUTE | MOUSEEVENTF_MOVE;
    input.mi.time = 0;
    input.mi.dwExtraInfo = 0;
    SendInput(1, &input, sizeof(input));
}

	 * for system messages, because those were presumably generated as an
	 * Alt-char sequence (e.g. accelerator keys).
	 */

	if ((msg.message == WM_CHAR) && (msg.lParam & 0x20000000)) {
	    xkey->state = 0;
	}
	xkey->trans_chars[xkey->nbytes++] = (char) msg.wParam;


	if (((unsigned short) msg.wParam) > ((unsigned short) 0xff)) {
	    /*
	     * Some "addon" input devices, such as the popular PenPower
	     * Chinese writing pad, generate 16 bit values in WM_CHAR messages
	     * (instead of passing them in two separate WM_CHAR messages
	     * containing two 8-bit values.