initial utils for visual string length improvementsstr-visual

9 files changed, 483 insertions, 312 deletions

diff --git a/WinPort/CMakeLists.txt b/WinPort/CMakeLists.txt
index 2467b440..62d8320b 100644
--- a/WinPort/CMakeLists.txt
+++ b/WinPort/CMakeLists.txt
@@ -36,7 +36,6 @@ src/Backend/TTY/TTYOutput.cpp
 src/Backend/TTY/TTYFar2lClipboardBackend.cpp
 src/Backend/TTY/TTYNegotiateFar2l.cpp
 src/Backend/TTY/TTYXGlue.cpp
-src/Backend/TTY/IsUnstableWidthChar.cpp
 )
 
 add_library (WinPort ${SOURCES})
diff --git a/WinPort/src/Backend/TTY/IsUnstableWidthChar_mk.cpp b/WinPort/src/Backend/TTY/IsUnstableWidthChar_mk.cpp
deleted file mode 100644
index e5684611..00000000
--- a/WinPort/src/Backend/TTY/IsUnstableWidthChar_mk.cpp
+++ /dev/null
@@ -1,72 +0,0 @@
-#include "unicode/uchar.h"
-#include "unicode/utypes.h"
-#include "unicode/stringoptions.h"
-#include "stdio.h"
-
-/// Usage:
-/// g++ -O2 ./IsUnstableWidthChar_mk.cpp -o /tmp/IsUnstableWidthChar_mk -licuuc && /tmp/IsUnstableWidthChar_mk > IsUnstableWidthChar.cpp
-
-static bool IsUnstableWidthBlock(int block)
-{
-	return block == UBLOCK_ARROWS
-	 || block == UBLOCK_MATHEMATICAL_OPERATORS
-	 || block == UBLOCK_MISCELLANEOUS_TECHNICAL
-	 || block == UBLOCK_CONTROL_PICTURES
-	 || block == UBLOCK_GEOMETRIC_SHAPES
-	 || block == UBLOCK_MISCELLANEOUS_SYMBOLS
-	 || block == UBLOCK_COMBINING_DIACRITICAL_MARKS
-	 || block == UBLOCK_COMBINING_MARKS_FOR_SYMBOLS
-	 || block == UBLOCK_COMBINING_HALF_MARKS
-	 || block == UBLOCK_COMBINING_DIACRITICAL_MARKS_SUPPLEMENT
-	 || block == UBLOCK_COMBINING_DIACRITICAL_MARKS_EXTENDED
-	;
-}
-
-int main()
-{
-//	printf("%u\n", u_getIntPropertyValue(0xcbe, UCHAR_GENERAL_CATEGORY));
-//	return -1;
-	UChar32 c, last = 0x10ffff;
-	UChar32 unstable_start = 0;
-	bool first = true;
-	printf("// this file autogenerated by IsUnstableWidthChar_mk.cpp\n\n");
-	printf("#include <wchar.h>\n\n");
-	printf("bool IsUnstableWidthChar(wchar_t c)\n");
-	printf("{\n");
-	printf("\treturn ");
-	for (c = 1; c <= last + 1; ++c) {
-		bool unstable = false;
-		if (c <= last) {
-			const auto width = u_getIntPropertyValue(c, UCHAR_EAST_ASIAN_WIDTH);
-			const auto jt = u_getIntPropertyValue(c, UCHAR_JOINING_TYPE);
-			const auto cat = u_getIntPropertyValue(c, UCHAR_GENERAL_CATEGORY);
-			unstable = (width == U_EA_FULLWIDTH || width == U_EA_WIDE
-				|| (jt != U_JT_NON_JOINING && jt != U_JT_TRANSPARENT)
-				|| cat == U_NON_SPACING_MARK || cat == U_COMBINING_SPACING_MARK || cat == U_SURROGATE
-				|| IsUnstableWidthBlock(u_getIntPropertyValue(c, UCHAR_BLOCK)));
-		}
-
-		if (unstable) {
-			if (!unstable_start) {
-				unstable_start = c;
-			}
-
-		} else if (unstable_start) {
-			if (first) {
-				first = false;
-			} else {
-				printf("\t || ");
-			}
-			if (unstable_start + 2 == c) {
-				printf("(c == 0x%x || c == 0x%x)\n", (unsigned int)unstable_start, (unsigned int)c - 1);
-			} else if (unstable_start + 1 < c) {
-				printf("(c >= 0x%x && c <= 0x%x)\n", (unsigned int)unstable_start, (unsigned int)c - 1);
-			} else {
-				printf("(c == 0x%x)\n", (unsigned int)unstable_start);
-			}
-			unstable_start = 0;
-		}
-	}
-	printf("\t;\n");
-	printf("}\n");
-}
diff --git a/WinPort/src/Backend/TTY/TTYBackend.cpp b/WinPort/src/Backend/TTY/TTYBackend.cpp
index 7c893d83..62c52d4e 100644
--- a/WinPort/src/Backend/TTY/TTYBackend.cpp
+++ b/WinPort/src/Backend/TTY/TTYBackend.cpp
@@ -28,8 +28,6 @@
 #include "FarTTY.h"
 #include "../FSClipboardBackend.h"
 
-bool IsUnstableWidthChar(wchar_t c);
-
 static volatile long s_terminal_size_change_id = 0;
 static TTYBackend * g_vtb = nullptr;
 
@@ -386,7 +384,7 @@ bool TTYBackend::IsUnstableWidthCharCached(wchar_t c)
 {
 	const size_t h = size_t(c) % ARRAYSIZE(_stable_width_chars_cache);
 	if (_stable_width_chars_cache[h] != c) {
-		if (IsUnstableWidthChar(c)) {
+		if (IsCharUnstableWidth(c)) {
 			return true;
 		}
 		_stable_width_chars_cache[h] = c;
diff --git a/far2l/src/mix/strmix.cpp b/far2l/src/mix/strmix.cpp
index 1e422050..190f9cd2 100644
--- a/far2l/src/mix/strmix.cpp
+++ b/far2l/src/mix/strmix.cpp
@@ -225,20 +225,13 @@ wchar_t* WINAPI TruncStrFromEnd(wchar_t *Str,int MaxLength)
 {
 	assert(MaxLength >= 0);
 
-	MaxLength=Max(0, MaxLength);
+	MaxLength = Max(0, MaxLength);
 
-	if (Str)
-	{
-		int Length = StrLength(Str);
-
-		if (Length > MaxLength)
-		{
-			if (MaxLength>3)
-				wmemcpy(Str+MaxLength-3, L"...", 3);
-
-			Str[MaxLength]=0;
-		}
-	}
+	const size_t Len = StrLength(Str);
+	size_t n = Len;
+	StrVisualTruncateRight(Str, n, MaxLength);
+	assert(n <= Len);
+	Str[n] = 0;
 
 	return Str;
 }
@@ -248,27 +241,13 @@ wchar_t* WINAPI TruncStr(wchar_t *Str,int MaxLength)
 {
 	assert(MaxLength >= 0);
 
-	MaxLength=Max(0, MaxLength);
+	MaxLength = Max(0, MaxLength);
 
-	if (Str)
-	{
-		int Length=StrLength(Str);
-
-		if (MaxLength<0)
-			MaxLength=0;
-
-		if (Length > MaxLength)
-		{
-			if (MaxLength>3)
-			{
-				wchar_t *MovePos = Str+Length-MaxLength+3;
-				wmemmove(Str+3, MovePos, StrLength(MovePos)+1);
-				wmemcpy(Str,L"...",3);
-			}
-
-			Str[MaxLength]=0;
-		}
-	}
+	const size_t Len = StrLength(Str);
+	size_t n = Len;
+	StrVisualTruncateLeft(Str, n, MaxLength);
+	assert(n <= Len);
+	Str[n] = 0;
 
 	return Str;
 }
@@ -286,31 +265,13 @@ wchar_t* TruncStrFromCenter(wchar_t *Str, int MaxLength)
 {
 	assert(MaxLength >= 0);
 
-	MaxLength=Max(0, MaxLength);
-
-	if (Str)
-	{
-		int Length = StrLength(Str);
-
-		if (MaxLength < 0)
-			MaxLength=0;
-
-		if (Length > MaxLength)
-		{
-			const int DotsLen = 3;
-
-			if (MaxLength > DotsLen)
-			{
-				int Len1 = (MaxLength - DotsLen) / 2;
-				int Len2 = MaxLength - DotsLen - Len1;
-				wmemcpy(Str + Len1, L"...", DotsLen);
-				wmemmove(Str + Len1 + DotsLen, Str + Length - Len2, Len2);
-			}
-
-			Str[MaxLength] = 0;
-		}
-	}
+	MaxLength = Max(0, MaxLength);
 
+	const size_t Len = StrLength(Str);
+	size_t n = Len;
+	StrVisualTruncateCenter(Str, n, MaxLength);
+	assert(n <= Len);
+	Str[n] = 0;
 	return Str;
 }
 
@@ -324,44 +285,8 @@ FARString& TruncStrFromCenter(FARString &strStr, int MaxLength)
 
 wchar_t* WINAPI TruncPathStr(wchar_t *Str, int MaxLength)
 {
-	assert(MaxLength >= 0);
-
-	MaxLength=Max(0, MaxLength);
-
-	if (Str)
-	{
-		int nLength = (int)wcslen(Str);
-
-		if ((MaxLength > 0) && (nLength > MaxLength) && (nLength >= 2))
-		{
-			wchar_t *lpStart = nullptr;
-
-/*			if (*Str && (Str[1] == L':') && IsSlash(Str[2]))
-				lpStart = Str+3;
-			else*/
-			{
-				if ((Str[0] == GOOD_SLASH) && (Str[1] == GOOD_SLASH))
-				{
-					if ((lpStart = const_cast<wchar_t*>(FirstSlash(Str+2))) )
-					{
-						wchar_t *lpStart2=lpStart;
-
-						if ((lpStart-Str < nLength) && ((lpStart=const_cast<wchar_t*>(FirstSlash(lpStart2+1)))))
-							lpStart++;
-					}
-				}
-			}
-
-			if (!lpStart || (lpStart-Str > MaxLength-5))
-				return TruncStr(Str, MaxLength);
-
-			wchar_t *lpInPos = lpStart+3+(nLength-MaxLength);
-			wmemmove(lpStart+3, lpInPos, (wcslen(lpInPos)+1));
-			wmemcpy(lpStart, L"...", 3);
-		}
-	}
-
-	return Str;
+	//  TODO
+	return TruncStr(Str, MaxLength);
 }
 
 
diff --git a/utils/CMakeLists.txt b/utils/CMakeLists.txt
index 44333da9..224e5644 100644
--- a/utils/CMakeLists.txt
+++ b/utils/CMakeLists.txt
@@ -30,6 +30,8 @@ set(SOURCES
   src/TestPath.cpp
   src/PipeIPC.cpp
   src/PathParts.cpp
+  src/CharClasses.cpp
+  src/StrVisual.cpp
 )
 
 add_library (utils ${SOURCES})
diff --git a/utils/include/utils.h b/utils/include/utils.h
index cb0b7e03..20163a34 100644
--- a/utils/include/utils.h
+++ b/utils/include/utils.h
@@ -332,3 +332,15 @@ template <typename ARRAY_T, class CHAR_T>
 }
 
 #define DBGLINE fprintf(stderr, "%d %d @%s\n", getpid(), __LINE__, __FILE__)
+
+bool IsCharFullWidth(wchar_t c);
+bool IsCharPrefix(wchar_t c);
+bool IsCharSuffix(wchar_t c);
+bool IsCharXxxfix(wchar_t c);
+
+bool IsCharUnstableWidth(wchar_t c);
+
+size_t StrVisualLength(const wchar_t *pwz, size_t n);
+void StrVisualTruncateLeft(wchar_t *pwz, size_t &n, size_t vl_max);
+void StrVisualTruncateRight(wchar_t *pwz, size_t &n, size_t vl_max);
+void StrVisualTruncateCenter(wchar_t *pwz, size_t &n, size_t vl_max);
diff --git a/WinPort/src/Backend/TTY/IsUnstableWidthChar.cpp b/utils/src/CharClasses.cpp
index 636266c3..3a0b4142 100644
--- a/WinPort/src/Backend/TTY/IsUnstableWidthChar.cpp
+++ b/utils/src/CharClasses.cpp
@@ -2,7 +2,212 @@
 
 #include <wchar.h>
 
-bool IsUnstableWidthChar(wchar_t c)
+bool IsCharFullWidth(wchar_t c)
+{
+	return (c >= 0x20 && c <= 0x7e)
+	 || (c >= 0xa1 && c <= 0xa8)
+	 || (c == 0xaa)
+	 || (c >= 0xac && c <= 0xb4)
+	 || (c >= 0xb6 && c <= 0xba)
+	 || (c >= 0xbc && c <= 0xbf)
+	 || (c == 0xc6)
+	 || (c == 0xd0)
+	 || (c == 0xd7 || c == 0xd8)
+	 || (c >= 0xde && c <= 0xe1)
+	 || (c == 0xe6)
+	 || (c >= 0xe8 && c <= 0xea)
+	 || (c == 0xec || c == 0xed)
+	 || (c == 0xf0)
+	 || (c == 0xf2 || c == 0xf3)
+	 || (c >= 0xf7 && c <= 0xfa)
+	 || (c == 0xfc)
+	 || (c == 0xfe)
+	 || (c == 0x101)
+	 || (c == 0x111)
+	 || (c == 0x113)
+	 || (c == 0x11b)
+	 || (c == 0x126 || c == 0x127)
+	 || (c == 0x12b)
+	 || (c >= 0x131 && c <= 0x133)
+	 || (c == 0x138)
+	 || (c >= 0x13f && c <= 0x142)
+	 || (c == 0x144)
+	 || (c >= 0x148 && c <= 0x14b)
+	 || (c == 0x14d)
+	 || (c == 0x152 || c == 0x153)
+	 || (c == 0x166 || c == 0x167)
+	 || (c == 0x16b)
+	 || (c == 0x1ce)
+	 || (c == 0x1d0)
+	 || (c == 0x1d2)
+	 || (c == 0x1d4)
+	 || (c == 0x1d6)
+	 || (c == 0x1d8)
+	 || (c == 0x1da)
+	 || (c == 0x1dc)
+	 || (c == 0x251)
+	 || (c == 0x261)
+	 || (c == 0x2c4)
+	 || (c == 0x2c7)
+	 || (c >= 0x2c9 && c <= 0x2cb)
+	 || (c == 0x2cd)
+	 || (c == 0x2d0)
+	 || (c >= 0x2d8 && c <= 0x2db)
+	 || (c == 0x2dd)
+	 || (c == 0x2df)
+	 || (c >= 0x300 && c <= 0x36f)
+	 || (c >= 0x391 && c <= 0x3a1)
+	 || (c >= 0x3a3 && c <= 0x3a9)
+	 || (c >= 0x3b1 && c <= 0x3c1)
+	 || (c >= 0x3c3 && c <= 0x3c9)
+	 || (c == 0x401)
+	 || (c >= 0x410 && c <= 0x44f)
+	 || (c == 0x451)
+	 || (c >= 0x1100 && c <= 0x115f)
+	 || (c == 0x2010)
+	 || (c >= 0x2013 && c <= 0x2016)
+	 || (c == 0x2018 || c == 0x2019)
+	 || (c == 0x201c || c == 0x201d)
+	 || (c >= 0x2020 && c <= 0x2022)
+	 || (c >= 0x2024 && c <= 0x2027)
+	 || (c == 0x2030)
+	 || (c == 0x2032 || c == 0x2033)
+	 || (c == 0x2035)
+	 || (c == 0x203b)
+	 || (c == 0x203e)
+	 || (c == 0x2074)
+	 || (c == 0x207f)
+	 || (c >= 0x2081 && c <= 0x2084)
+	 || (c == 0x20a9)
+	 || (c == 0x20ac)
+	 || (c == 0x2103)
+	 || (c == 0x2105)
+	 || (c == 0x2109)
+	 || (c == 0x2113)
+	 || (c == 0x2116)
+	 || (c == 0x2121 || c == 0x2122)
+	 || (c == 0x2126)
+	 || (c == 0x212b)
+	 || (c == 0x2153 || c == 0x2154)
+	 || (c >= 0x215b && c <= 0x215e)
+	 || (c >= 0x2160 && c <= 0x216b)
+	 || (c >= 0x2170 && c <= 0x2179)
+	 || (c == 0x2189)
+	 || (c >= 0x2190 && c <= 0x243f)
+	 || (c >= 0x2460 && c <= 0x24e9)
+	 || (c >= 0x24eb && c <= 0x254b)
+	 || (c >= 0x2550 && c <= 0x2573)
+	 || (c >= 0x2580 && c <= 0x258f)
+	 || (c >= 0x2592 && c <= 0x2595)
+	 || (c >= 0x25a0 && c <= 0x26ff)
+	 || (c == 0x2705)
+	 || (c == 0x270a || c == 0x270b)
+	 || (c == 0x2728)
+	 || (c == 0x273d)
+	 || (c == 0x274c)
+	 || (c == 0x274e)
+	 || (c >= 0x2753 && c <= 0x2755)
+	 || (c == 0x2757)
+	 || (c >= 0x2776 && c <= 0x277f)
+	 || (c >= 0x2795 && c <= 0x2797)
+	 || (c == 0x27b0)
+	 || (c == 0x27bf)
+	 || (c >= 0x27e6 && c <= 0x27ed)
+	 || (c == 0x2985 || c == 0x2986)
+	 || (c == 0x2b1b || c == 0x2b1c)
+	 || (c == 0x2b50)
+	 || (c >= 0x2b55 && c <= 0x2b59)
+	 || (c >= 0x2e80 && c <= 0x2e99)
+	 || (c >= 0x2e9b && c <= 0x2ef3)
+	 || (c >= 0x2f00 && c <= 0x2fd5)
+	 || (c >= 0x2ff0 && c <= 0x2ffb)
+	 || (c >= 0x3000 && c <= 0x303e)
+	 || (c >= 0x3041 && c <= 0x3096)
+	 || (c >= 0x3099 && c <= 0x30ff)
+	 || (c >= 0x3105 && c <= 0x312e)
+	 || (c >= 0x3131 && c <= 0x318e)
+	 || (c >= 0x3190 && c <= 0x31ba)
+	 || (c >= 0x31c0 && c <= 0x31e3)
+	 || (c >= 0x31f0 && c <= 0x321e)
+	 || (c >= 0x3220 && c <= 0x32fe)
+	 || (c >= 0x3300 && c <= 0x4dbf)
+	 || (c >= 0x4e00 && c <= 0xa48c)
+	 || (c >= 0xa490 && c <= 0xa4c6)
+	 || (c >= 0xa960 && c <= 0xa97c)
+	 || (c >= 0xac00 && c <= 0xd7a3)
+	 || (c >= 0xe000 && c <= 0xfaff)
+	 || (c >= 0xfe00 && c <= 0xfe19)
+	 || (c >= 0xfe30 && c <= 0xfe52)
+	 || (c >= 0xfe54 && c <= 0xfe66)
+	 || (c >= 0xfe68 && c <= 0xfe6b)
+	 || (c >= 0xff01 && c <= 0xffbe)
+	 || (c >= 0xffc2 && c <= 0xffc7)
+	 || (c >= 0xffca && c <= 0xffcf)
+	 || (c >= 0xffd2 && c <= 0xffd7)
+	 || (c >= 0xffda && c <= 0xffdc)
+	 || (c >= 0xffe0 && c <= 0xffe6)
+	 || (c >= 0xffe8 && c <= 0xffee)
+	 || (c == 0xfffd)
+	 || (c == 0x16fe0 || c == 0x16fe1)
+	 || (c >= 0x17000 && c <= 0x187ec)
+	 || (c >= 0x18800 && c <= 0x18af2)
+	 || (c >= 0x1b000 && c <= 0x1b11e)
+	 || (c >= 0x1b170 && c <= 0x1b2fb)
+	 || (c == 0x1f004)
+	 || (c == 0x1f0cf)
+	 || (c >= 0x1f100 && c <= 0x1f10a)
+	 || (c >= 0x1f110 && c <= 0x1f12d)
+	 || (c >= 0x1f130 && c <= 0x1f169)
+	 || (c >= 0x1f170 && c <= 0x1f1ac)
+	 || (c >= 0x1f200 && c <= 0x1f202)
+	 || (c >= 0x1f210 && c <= 0x1f23b)
+	 || (c >= 0x1f240 && c <= 0x1f248)
+	 || (c == 0x1f250 || c == 0x1f251)
+	 || (c >= 0x1f260 && c <= 0x1f265)
+	 || (c >= 0x1f300 && c <= 0x1f320)
+	 || (c >= 0x1f32d && c <= 0x1f335)
+	 || (c >= 0x1f337 && c <= 0x1f37c)
+	 || (c >= 0x1f37e && c <= 0x1f393)
+	 || (c >= 0x1f3a0 && c <= 0x1f3ca)
+	 || (c >= 0x1f3cf && c <= 0x1f3d3)
+	 || (c >= 0x1f3e0 && c <= 0x1f3f0)
+	 || (c == 0x1f3f4)
+	 || (c >= 0x1f3f8 && c <= 0x1f43e)
+	 || (c == 0x1f440)
+	 || (c >= 0x1f442 && c <= 0x1f4fc)
+	 || (c >= 0x1f4ff && c <= 0x1f53d)
+	 || (c >= 0x1f54b && c <= 0x1f54e)
+	 || (c >= 0x1f550 && c <= 0x1f567)
+	 || (c == 0x1f57a)
+	 || (c == 0x1f595 || c == 0x1f596)
+	 || (c == 0x1f5a4)
+	 || (c >= 0x1f5fb && c <= 0x1f64f)
+	 || (c >= 0x1f680 && c <= 0x1f6c5)
+	 || (c == 0x1f6cc)
+	 || (c >= 0x1f6d0 && c <= 0x1f6d2)
+	 || (c == 0x1f6eb || c == 0x1f6ec)
+	 || (c >= 0x1f6f4 && c <= 0x1f6f8)
+	 || (c >= 0x1f910 && c <= 0x1f93e)
+	 || (c >= 0x1f940 && c <= 0x1f94c)
+	 || (c >= 0x1f950 && c <= 0x1f96b)
+	 || (c >= 0x1f980 && c <= 0x1f997)
+	 || (c == 0x1f9c0)
+	 || (c >= 0x1f9d0 && c <= 0x1f9e6)
+	 || (c >= 0x20000 && c <= 0x2fffd)
+	 || (c >= 0x30000 && c <= 0x3fffd)
+	 || (c >= 0xe0100 && c <= 0xe01ef)
+	 || (c >= 0xf0000 && c <= 0xffffd)
+	 || (c >= 0x100000 && c <= 0x10fffd)
+	;
+}
+
+bool IsCharPrefix(wchar_t c)
+{
+	return (c >= 0xd800 && c <= 0xdfff)
+	;
+}
+
+bool IsCharSuffix(wchar_t c)
 {
 	return (c >= 0x300 && c <= 0x36f)
 	 || (c >= 0x483 && c <= 0x487)
@@ -27,19 +232,19 @@ bool IsUnstableWidthChar(wchar_t c)
 	 || (c >= 0x7a6 && c <= 0x7b0)
 	 || (c >= 0x7ca && c <= 0x7f3)
 	 || (c == 0x7fa)
-	 || (c == 0x7fd)
 	 || (c >= 0x816 && c <= 0x819)
 	 || (c >= 0x81b && c <= 0x823)
 	 || (c >= 0x825 && c <= 0x827)
 	 || (c >= 0x829 && c <= 0x82d)
-	 || (c >= 0x840 && c <= 0x85b)
+	 || (c >= 0x840 && c <= 0x855)
+	 || (c >= 0x859 && c <= 0x85b)
 	 || (c == 0x860)
 	 || (c >= 0x862 && c <= 0x865)
 	 || (c >= 0x867 && c <= 0x86a)
 	 || (c >= 0x8a0 && c <= 0x8ac)
 	 || (c >= 0x8ae && c <= 0x8b4)
-	 || (c >= 0x8b6 && c <= 0x8c7)
-	 || (c >= 0x8d3 && c <= 0x8e1)
+	 || (c >= 0x8b6 && c <= 0x8bd)
+	 || (c >= 0x8d4 && c <= 0x8e1)
 	 || (c >= 0x8e3 && c <= 0x903)
 	 || (c >= 0x93a && c <= 0x93c)
 	 || (c >= 0x93e && c <= 0x94f)
@@ -52,7 +257,6 @@ bool IsUnstableWidthChar(wchar_t c)
 	 || (c >= 0x9cb && c <= 0x9cd)
 	 || (c == 0x9d7)
 	 || (c == 0x9e2 || c == 0x9e3)
-	 || (c == 0x9fe)
 	 || (c >= 0xa01 && c <= 0xa03)
 	 || (c == 0xa3c)
 	 || (c >= 0xa3e && c <= 0xa42)
@@ -73,14 +277,14 @@ bool IsUnstableWidthChar(wchar_t c)
 	 || (c >= 0xb3e && c <= 0xb44)
 	 || (c == 0xb47 || c == 0xb48)
 	 || (c >= 0xb4b && c <= 0xb4d)
-	 || (c >= 0xb55 && c <= 0xb57)
+	 || (c == 0xb56 || c == 0xb57)
 	 || (c == 0xb62 || c == 0xb63)
 	 || (c == 0xb82)
 	 || (c >= 0xbbe && c <= 0xbc2)
 	 || (c >= 0xbc6 && c <= 0xbc8)
 	 || (c >= 0xbca && c <= 0xbcd)
 	 || (c == 0xbd7)
-	 || (c >= 0xc00 && c <= 0xc04)
+	 || (c >= 0xc00 && c <= 0xc03)
 	 || (c >= 0xc3e && c <= 0xc44)
 	 || (c >= 0xc46 && c <= 0xc48)
 	 || (c >= 0xc4a && c <= 0xc4d)
@@ -100,7 +304,7 @@ bool IsUnstableWidthChar(wchar_t c)
 	 || (c >= 0xd4a && c <= 0xd4d)
 	 || (c == 0xd57)
 	 || (c == 0xd62 || c == 0xd63)
-	 || (c >= 0xd81 && c <= 0xd83)
+	 || (c == 0xd82 || c == 0xd83)
 	 || (c == 0xdca)
 	 || (c >= 0xdcf && c <= 0xdd4)
 	 || (c == 0xdd6)
@@ -110,7 +314,8 @@ bool IsUnstableWidthChar(wchar_t c)
 	 || (c >= 0xe34 && c <= 0xe3a)
 	 || (c >= 0xe47 && c <= 0xe4e)
 	 || (c == 0xeb1)
-	 || (c >= 0xeb4 && c <= 0xebc)
+	 || (c >= 0xeb4 && c <= 0xeb9)
+	 || (c == 0xebb || c == 0xebc)
 	 || (c >= 0xec8 && c <= 0xecd)
 	 || (c == 0xf18 || c == 0xf19)
 	 || (c == 0xf35)
@@ -131,7 +336,6 @@ bool IsUnstableWidthChar(wchar_t c)
 	 || (c >= 0x1082 && c <= 0x108d)
 	 || (c == 0x108f)
 	 || (c >= 0x109a && c <= 0x109d)
-	 || (c >= 0x1100 && c <= 0x115f)
 	 || (c >= 0x135d && c <= 0x135f)
 	 || (c >= 0x1712 && c <= 0x1714)
 	 || (c >= 0x1732 && c <= 0x1734)
@@ -141,7 +345,7 @@ bool IsUnstableWidthChar(wchar_t c)
 	 || (c == 0x17dd)
 	 || (c == 0x1807)
 	 || (c >= 0x180a && c <= 0x180d)
-	 || (c >= 0x1820 && c <= 0x1878)
+	 || (c >= 0x1820 && c <= 0x1877)
 	 || (c >= 0x1885 && c <= 0x18aa)
 	 || (c >= 0x1920 && c <= 0x192b)
 	 || (c >= 0x1930 && c <= 0x193b)
@@ -159,44 +363,18 @@ bool IsUnstableWidthChar(wchar_t c)
 	 || (c >= 0x1cd0 && c <= 0x1cd2)
 	 || (c >= 0x1cd4 && c <= 0x1ce8)
 	 || (c == 0x1ced)
-	 || (c == 0x1cf4)
+	 || (c >= 0x1cf2 && c <= 0x1cf4)
 	 || (c >= 0x1cf7 && c <= 0x1cf9)
 	 || (c >= 0x1dc0 && c <= 0x1dff)
 	 || (c == 0x200d)
 	 || (c >= 0x20d0 && c <= 0x20ff)
 	 || (c >= 0x2190 && c <= 0x243f)
 	 || (c >= 0x25a0 && c <= 0x26ff)
-	 || (c == 0x2705)
-	 || (c == 0x270a || c == 0x270b)
-	 || (c == 0x2728)
-	 || (c == 0x274c)
-	 || (c == 0x274e)
-	 || (c >= 0x2753 && c <= 0x2755)
-	 || (c == 0x2757)
-	 || (c >= 0x2795 && c <= 0x2797)
-	 || (c == 0x27b0)
-	 || (c == 0x27bf)
-	 || (c == 0x2b1b || c == 0x2b1c)
-	 || (c == 0x2b50)
-	 || (c == 0x2b55)
 	 || (c >= 0x2cef && c <= 0x2cf1)
 	 || (c == 0x2d7f)
 	 || (c >= 0x2de0 && c <= 0x2dff)
-	 || (c >= 0x2e80 && c <= 0x2e99)
-	 || (c >= 0x2e9b && c <= 0x2ef3)
-	 || (c >= 0x2f00 && c <= 0x2fd5)
-	 || (c >= 0x2ff0 && c <= 0x2ffb)
-	 || (c >= 0x3000 && c <= 0x303e)
-	 || (c >= 0x3041 && c <= 0x3096)
-	 || (c >= 0x3099 && c <= 0x30ff)
-	 || (c >= 0x3105 && c <= 0x312f)
-	 || (c >= 0x3131 && c <= 0x318e)
-	 || (c >= 0x3190 && c <= 0x31e3)
-	 || (c >= 0x31f0 && c <= 0x321e)
-	 || (c >= 0x3220 && c <= 0x3247)
-	 || (c >= 0x3250 && c <= 0x4dbf)
-	 || (c >= 0x4e00 && c <= 0xa48c)
-	 || (c >= 0xa490 && c <= 0xa4c6)
+	 || (c >= 0x302a && c <= 0x302f)
+	 || (c == 0x3099 || c == 0x309a)
 	 || (c == 0xa66f)
 	 || (c >= 0xa674 && c <= 0xa67d)
 	 || (c == 0xa69e || c == 0xa69f)
@@ -205,15 +383,12 @@ bool IsUnstableWidthChar(wchar_t c)
 	 || (c == 0xa806)
 	 || (c == 0xa80b)
 	 || (c >= 0xa823 && c <= 0xa827)
-	 || (c == 0xa82c)
 	 || (c >= 0xa840 && c <= 0xa872)
 	 || (c == 0xa880 || c == 0xa881)
 	 || (c >= 0xa8b4 && c <= 0xa8c5)
 	 || (c >= 0xa8e0 && c <= 0xa8f1)
-	 || (c == 0xa8ff)
 	 || (c >= 0xa926 && c <= 0xa92d)
 	 || (c >= 0xa947 && c <= 0xa953)
-	 || (c >= 0xa960 && c <= 0xa97c)
 	 || (c >= 0xa980 && c <= 0xa983)
 	 || (c >= 0xa9b3 && c <= 0xa9c0)
 	 || (c == 0xa9e5)
@@ -230,16 +405,9 @@ bool IsUnstableWidthChar(wchar_t c)
 	 || (c == 0xaaf5 || c == 0xaaf6)
 	 || (c >= 0xabe3 && c <= 0xabea)
 	 || (c == 0xabec || c == 0xabed)
-	 || (c >= 0xac00 && c <= 0xd7a3)
-	 || (c >= 0xd800 && c <= 0xdfff)
-	 || (c >= 0xf900 && c <= 0xfaff)
 	 || (c == 0xfb1e)
-	 || (c >= 0xfe00 && c <= 0xfe19)
-	 || (c >= 0xfe20 && c <= 0xfe52)
-	 || (c >= 0xfe54 && c <= 0xfe66)
-	 || (c >= 0xfe68 && c <= 0xfe6b)
-	 || (c >= 0xff01 && c <= 0xff60)
-	 || (c >= 0xffe0 && c <= 0xffe6)
+	 || (c >= 0xfe00 && c <= 0xfe0f)
+	 || (c >= 0xfe20 && c <= 0xfe2f)
 	 || (c == 0x101fd)
 	 || (c == 0x102e0)
 	 || (c >= 0x10376 && c <= 0x1037a)
@@ -256,32 +424,21 @@ bool IsUnstableWidthChar(wchar_t c)
 	 || (c >= 0x10aeb && c <= 0x10aef)
 	 || (c >= 0x10b80 && c <= 0x10b91)
 	 || (c >= 0x10ba9 && c <= 0x10bae)
-	 || (c >= 0x10d00 && c <= 0x10d27)
-	 || (c == 0x10eab || c == 0x10eac)
-	 || (c >= 0x10f30 && c <= 0x10f44)
-	 || (c >= 0x10f46 && c <= 0x10f54)
-	 || (c == 0x10fb0)
-	 || (c >= 0x10fb2 && c <= 0x10fb6)
-	 || (c >= 0x10fb8 && c <= 0x10fbf)
-	 || (c >= 0x10fc1 && c <= 0x10fc4)
-	 || (c >= 0x10fc9 && c <= 0x10fcb)
 	 || (c >= 0x11000 && c <= 0x11002)
 	 || (c >= 0x11038 && c <= 0x11046)
 	 || (c >= 0x1107f && c <= 0x11082)
 	 || (c >= 0x110b0 && c <= 0x110ba)
 	 || (c >= 0x11100 && c <= 0x11102)
 	 || (c >= 0x11127 && c <= 0x11134)
-	 || (c == 0x11145 || c == 0x11146)
 	 || (c == 0x11173)
 	 || (c >= 0x11180 && c <= 0x11182)
 	 || (c >= 0x111b3 && c <= 0x111c0)
-	 || (c >= 0x111c9 && c <= 0x111cc)
-	 || (c == 0x111ce || c == 0x111cf)
+	 || (c >= 0x111ca && c <= 0x111cc)
 	 || (c >= 0x1122c && c <= 0x11237)
 	 || (c == 0x1123e)
 	 || (c >= 0x112df && c <= 0x112ea)
 	 || (c >= 0x11300 && c <= 0x11303)
-	 || (c == 0x1133b || c == 0x1133c)
+	 || (c == 0x1133c)
 	 || (c >= 0x1133e && c <= 0x11344)
 	 || (c == 0x11347 || c == 0x11348)
 	 || (c >= 0x1134b && c <= 0x1134d)
@@ -290,7 +447,6 @@ bool IsUnstableWidthChar(wchar_t c)
 	 || (c >= 0x11366 && c <= 0x1136c)
 	 || (c >= 0x11370 && c <= 0x11374)
 	 || (c >= 0x11435 && c <= 0x11446)
-	 || (c == 0x1145e)
 	 || (c >= 0x114b0 && c <= 0x114c3)
 	 || (c >= 0x115af && c <= 0x115b5)
 	 || (c >= 0x115b8 && c <= 0x115c0)
@@ -298,15 +454,6 @@ bool IsUnstableWidthChar(wchar_t c)
 	 || (c >= 0x11630 && c <= 0x11640)
 	 || (c >= 0x116ab && c <= 0x116b7)
 	 || (c >= 0x1171d && c <= 0x1172b)
-	 || (c >= 0x1182c && c <= 0x1183a)
-	 || (c >= 0x11930 && c <= 0x11935)
-	 || (c == 0x11937 || c == 0x11938)
-	 || (c >= 0x1193b && c <= 0x1193e)
-	 || (c == 0x11940)
-	 || (c == 0x11942 || c == 0x11943)
-	 || (c >= 0x119d1 && c <= 0x119d7)
-	 || (c >= 0x119da && c <= 0x119e0)
-	 || (c == 0x119e4)
 	 || (c >= 0x11a01 && c <= 0x11a0a)
 	 || (c >= 0x11a33 && c <= 0x11a39)
 	 || (c >= 0x11a3b && c <= 0x11a3e)
@@ -322,24 +469,10 @@ bool IsUnstableWidthChar(wchar_t c)
 	 || (c == 0x11d3c || c == 0x11d3d)
 	 || (c >= 0x11d3f && c <= 0x11d45)
 	 || (c == 0x11d47)
-	 || (c >= 0x11d8a && c <= 0x11d8e)
-	 || (c == 0x11d90 || c == 0x11d91)
-	 || (c >= 0x11d93 && c <= 0x11d97)
-	 || (c >= 0x11ef3 && c <= 0x11ef6)
 	 || (c >= 0x16af0 && c <= 0x16af4)
 	 || (c >= 0x16b30 && c <= 0x16b36)
-	 || (c == 0x16f4f)
-	 || (c >= 0x16f51 && c <= 0x16f87)
+	 || (c >= 0x16f51 && c <= 0x16f7e)
 	 || (c >= 0x16f8f && c <= 0x16f92)
-	 || (c >= 0x16fe0 && c <= 0x16fe4)
-	 || (c == 0x16ff0 || c == 0x16ff1)
-	 || (c >= 0x17000 && c <= 0x187f7)
-	 || (c >= 0x18800 && c <= 0x18cd5)
-	 || (c >= 0x18d00 && c <= 0x18d08)
-	 || (c >= 0x1b000 && c <= 0x1b11e)
-	 || (c >= 0x1b150 && c <= 0x1b152)
-	 || (c >= 0x1b164 && c <= 0x1b167)
-	 || (c >= 0x1b170 && c <= 0x1b2fb)
 	 || (c == 0x1bc9d || c == 0x1bc9e)
 	 || (c >= 0x1d165 && c <= 0x1d169)
 	 || (c >= 0x1d16d && c <= 0x1d172)
@@ -358,58 +491,17 @@ bool IsUnstableWidthChar(wchar_t c)
 	 || (c >= 0x1e01b && c <= 0x1e021)
 	 || (c == 0x1e023 || c == 0x1e024)
 	 || (c >= 0x1e026 && c <= 0x1e02a)
-	 || (c >= 0x1e130 && c <= 0x1e136)
-	 || (c >= 0x1e2ec && c <= 0x1e2ef)
 	 || (c >= 0x1e8d0 && c <= 0x1e8d6)
 	 || (c >= 0x1e900 && c <= 0x1e94a)
-	 || (c == 0x1f004)
-	 || (c == 0x1f0cf)
-	 || (c == 0x1f18e)
-	 || (c >= 0x1f191 && c <= 0x1f19a)
-	 || (c >= 0x1f200 && c <= 0x1f202)
-	 || (c >= 0x1f210 && c <= 0x1f23b)
-	 || (c >= 0x1f240 && c <= 0x1f248)
-	 || (c == 0x1f250 || c == 0x1f251)
-	 || (c >= 0x1f260 && c <= 0x1f265)
-	 || (c >= 0x1f300 && c <= 0x1f320)
-	 || (c >= 0x1f32d && c <= 0x1f335)
-	 || (c >= 0x1f337 && c <= 0x1f37c)
-	 || (c >= 0x1f37e && c <= 0x1f393)
-	 || (c >= 0x1f3a0 && c <= 0x1f3ca)
-	 || (c >= 0x1f3cf && c <= 0x1f3d3)
-	 || (c >= 0x1f3e0 && c <= 0x1f3f0)
-	 || (c == 0x1f3f4)
-	 || (c >= 0x1f3f8 && c <= 0x1f43e)
-	 || (c == 0x1f440)
-	 || (c >= 0x1f442 && c <= 0x1f4fc)
-	 || (c >= 0x1f4ff && c <= 0x1f53d)
-	 || (c >= 0x1f54b && c <= 0x1f54e)
-	 || (c >= 0x1f550 && c <= 0x1f567)
-	 || (c == 0x1f57a)
-	 || (c == 0x1f595 || c == 0x1f596)
-	 || (c == 0x1f5a4)
-	 || (c >= 0x1f5fb && c <= 0x1f64f)
-	 || (c >= 0x1f680 && c <= 0x1f6c5)
-	 || (c == 0x1f6cc)
-	 || (c >= 0x1f6d0 && c <= 0x1f6d2)
-	 || (c >= 0x1f6d5 && c <= 0x1f6d7)
-	 || (c == 0x1f6eb || c == 0x1f6ec)
-	 || (c >= 0x1f6f4 && c <= 0x1f6fc)
-	 || (c >= 0x1f7e0 && c <= 0x1f7eb)
-	 || (c >= 0x1f90c && c <= 0x1f93a)
-	 || (c >= 0x1f93c && c <= 0x1f945)
-	 || (c >= 0x1f947 && c <= 0x1f978)
-	 || (c >= 0x1f97a && c <= 0x1f9cb)
-	 || (c >= 0x1f9cd && c <= 0x1f9ff)
-	 || (c >= 0x1fa70 && c <= 0x1fa74)
-	 || (c >= 0x1fa78 && c <= 0x1fa7a)
-	 || (c >= 0x1fa80 && c <= 0x1fa86)
-	 || (c >= 0x1fa90 && c <= 0x1faa8)
-	 || (c >= 0x1fab0 && c <= 0x1fab6)
-	 || (c >= 0x1fac0 && c <= 0x1fac2)
-	 || (c >= 0x1fad0 && c <= 0x1fad6)
-	 || (c >= 0x20000 && c <= 0x2fffd)
-	 || (c >= 0x30000 && c <= 0x3fffd)
 	 || (c >= 0xe0100 && c <= 0xe01ef)
 	;
 }
+
+bool IsCharXxxfix(wchar_t c)
+{
+	return IsCharPrefix(c) || IsCharSuffix(c);
+}
+bool IsCharUnstableWidth(wchar_t c)
+{
+	return IsCharFullWidth(c) || IsCharXxxfix(c);
+}
diff --git a/utils/src/CharClasses_mk.cpp b/utils/src/CharClasses_mk.cpp
new file mode 100644
index 00000000..cc78f61f
--- /dev/null
+++ b/utils/src/CharClasses_mk.cpp
@@ -0,0 +1,110 @@
+#include "unicode/uchar.h"
+#include "unicode/utypes.h"
+#include "unicode/stringoptions.h"
+#include "stdio.h"
+
+/// Usage:
+/// g++ -O2 ./CharClasses_mk.cpp -o /tmp/CharClasses_mk -licuuc && /tmp/CharClasses_mk > CharClasses.cpp
+
+static bool IsUnstableWidthBlock(int block)
+{
+	return block == UBLOCK_ARROWS
+	 || block == UBLOCK_MATHEMATICAL_OPERATORS
+	 || block == UBLOCK_MISCELLANEOUS_TECHNICAL
+	 || block == UBLOCK_CONTROL_PICTURES
+	 || block == UBLOCK_GEOMETRIC_SHAPES
+	 || block == UBLOCK_MISCELLANEOUS_SYMBOLS
+	 || block == UBLOCK_COMBINING_DIACRITICAL_MARKS
+	 || block == UBLOCK_COMBINING_MARKS_FOR_SYMBOLS
+	 || block == UBLOCK_COMBINING_HALF_MARKS
+	 || block == UBLOCK_COMBINING_DIACRITICAL_MARKS_SUPPLEMENT
+	 || block == UBLOCK_COMBINING_DIACRITICAL_MARKS_EXTENDED
+	;
+}
+
+template <class FN>
+	static void WriteFunc(const char *name, FN fn)
+{
+	UChar32 c, last = 0x10ffff;
+	UChar32 start = 0;
+	bool first = true;
+	printf("bool %s(wchar_t c)\n", name);
+	printf("{\n");
+	printf("\treturn ");
+	for (c = 1; c <= last + 1; ++c) {
+		const bool matched = (c <= last) && fn(c);
+		if (matched) {
+			if (!start) {
+				start = c;
+			}
+
+		} else if (start) {
+			if (first) {
+				first = false;
+			} else {
+				printf("\t || ");
+			}
+			if (start + 2 == c) {
+				printf("(c == 0x%x || c == 0x%x)\n", (unsigned int)start, (unsigned int)c - 1);
+			} else if (start + 1 < c) {
+				printf("(c >= 0x%x && c <= 0x%x)\n", (unsigned int)start, (unsigned int)c - 1);
+			} else {
+				printf("(c == 0x%x)\n", (unsigned int)start);
+			}
+			start = 0;
+		}
+	}
+	printf("\t;\n");
+	printf("}\n\n");
+}
+
+int main()
+{
+//	printf("%u\n", u_getIntPropertyValue(0xcbe, UCHAR_GENERAL_CATEGORY));
+//	return -1;
+	UChar32 c, last = 0x10ffff;
+	UChar32 unstable_start = 0;
+	bool first = true;
+	printf("// this file autogenerated by IsUnstableWidthChar_mk.cpp\n\n");
+	printf("#include <wchar.h>\n\n");
+
+	WriteFunc("IsCharFullWidth", [](wchar_t c)->bool {
+		const auto block = u_getIntPropertyValue(c, UCHAR_BLOCK);
+		return u_getIntPropertyValue(c, UCHAR_EAST_ASIAN_WIDTH) != 0
+				|| block == UBLOCK_ARROWS
+				|| block == UBLOCK_MATHEMATICAL_OPERATORS
+				|| block == UBLOCK_MISCELLANEOUS_TECHNICAL
+				|| block == UBLOCK_CONTROL_PICTURES
+				|| block == UBLOCK_GEOMETRIC_SHAPES
+				|| block == UBLOCK_MISCELLANEOUS_SYMBOLS;
+	});
+
+	WriteFunc("IsCharPrefix", [](wchar_t c)->bool {
+		const auto cat = u_getIntPropertyValue(c, UCHAR_GENERAL_CATEGORY);
+		return (cat == U_SURROGATE);
+	});
+
+	WriteFunc("IsCharSuffix", [](wchar_t c)->bool {
+		const auto block = u_getIntPropertyValue(c, UCHAR_BLOCK);
+		const auto jt = u_getIntPropertyValue(c, UCHAR_JOINING_TYPE);
+		const auto cat = u_getIntPropertyValue(c, UCHAR_GENERAL_CATEGORY);
+		return ( (jt != U_JT_NON_JOINING && jt != U_JT_TRANSPARENT)
+			|| cat == U_NON_SPACING_MARK || cat == U_COMBINING_SPACING_MARK
+			|| IsUnstableWidthBlock(u_getIntPropertyValue(c, UCHAR_BLOCK))
+			|| block == UBLOCK_COMBINING_DIACRITICAL_MARKS
+			|| block == UBLOCK_COMBINING_MARKS_FOR_SYMBOLS
+			|| block == UBLOCK_COMBINING_HALF_MARKS
+			|| block == UBLOCK_COMBINING_DIACRITICAL_MARKS_SUPPLEMENT
+			|| block == UBLOCK_COMBINING_DIACRITICAL_MARKS_EXTENDED);
+	});
+
+	printf("bool IsCharXxxfix(wchar_t c)\n");
+	printf("{\n");
+	printf("\treturn IsCharPrefix(c) || IsCharSuffix(c);\n");
+	printf("}\n");
+
+	printf("bool IsCharUnstableWidth(wchar_t c)\n");
+	printf("{\n");
+	printf("\treturn IsCharFullWidth(c) || IsCharXxxfix(c);\n");
+	printf("}\n");
+}
diff --git a/utils/src/StrVisual.cpp b/utils/src/StrVisual.cpp
new file mode 100644
index 00000000..0ded4932
--- /dev/null
+++ b/utils/src/StrVisual.cpp
@@ -0,0 +1,105 @@
+#include "utils.h"
+
+size_t StrVisualLength(const wchar_t *pwz, size_t n)
+{
+	size_t out = 0;
+	for (size_t i = 0; i < n; ++i) {
+		if (IsCharFullWidth(*pwz)) {
+			out+= 2;
+		} else if ((i == n - 1 || !IsCharPrefix(pwz[i])) && (i == 0 || !IsCharSuffix(pwz[i]))) {
+			++out;
+		}
+	}
+	return out;
+}
+
+void StrVisualTruncateLeft(wchar_t *pwz, size_t &n, size_t vl_max)
+{
+	size_t vl = StrVisualLength(pwz, n);
+	if (vl <= vl_max || n < 3) {
+		return;
+	}
+
+	for (size_t ofs = 3; ofs < n; ++ofs) {
+		if (!IsCharXxxfix(pwz[ofs]) && StrVisualLength(pwz + ofs, n - ofs) + 3 <= vl_max) {
+			n-= ofs;
+			wmemmove(pwz + 3, pwz + ofs, n);
+			n+= 3;
+			wmemcpy(pwz, L"...", 3);
+			return;
+		}
+	}
+	wcsncpy(pwz, L"...", vl_max);
+	n = vl_max;
+}
+
+void StrVisualTruncateRight(wchar_t *pwz, size_t &n, size_t vl_max)
+{
+	size_t vl = StrVisualLength(pwz, n);
+	if (vl <= vl_max || n < 3) {
+		return;
+	}
+
+	n-= 3; // pre-reserve space for ...
+	do {
+		while (n > 0 && IsCharXxxfix(pwz[n - 1])) {
+			--n;
+		}
+		if (n == 0) {
+			break;
+		}
+		--n;
+	} while (StrVisualLength(pwz, n) + 3 > vl_max);
+
+	wmemcpy(&pwz[n], L"...", 3);
+	n+= 3;
+}
+
+void StrVisualTruncateCenter(wchar_t *pwz, size_t &n, size_t vl_max)
+{
+	size_t vl = StrVisualLength(pwz, n);
+	if (vl <= vl_max || n < 3) {
+		return;
+	}
+
+	auto cut_start = n / 2;
+	if (cut_start > 0) {
+		--cut_start;
+	}
+	if (cut_start > 0) {
+		--cut_start;
+	}
+	while (cut_start > 0 && IsCharXxxfix(pwz[cut_start])) {
+		--cut_start;
+	}
+	auto cut_end = cut_start + 3;
+	while (cut_end < n && IsCharXxxfix(pwz[cut_end])) {
+		++cut_end;
+	}
+
+	while (StrVisualLength(pwz, cut_start) + StrVisualLength(pwz + cut_end, n - cut_end) + 3 > vl_max) {
+		if (cut_start > 0) {
+			--cut_start;
+			while (cut_start > 0 && IsCharXxxfix(pwz[cut_start])) {
+				--cut_start;
+			}
+			if (StrVisualLength(pwz, cut_start) + StrVisualLength(pwz + cut_end, n - cut_end) + 3 <= vl_max) {
+				break;
+			}
+		}
+		if (cut_end < n) {
+			++cut_end;
+			while (cut_end < n && IsCharXxxfix(pwz[cut_end])) {
+				++cut_end;
+			}
+		}
+	}
+
+	wmemmove(&pwz[cut_start + 3], &pwz[cut_end], n - cut_end);
+	wmemcpy(&pwz[cut_start], L"...", 3);
+	n-= (cut_end - cut_start);
+	n+= 3;
+}
+
+
+