关于汉字折行，这里贴出对WrapLine函数的完整修改，以供参考。
procedure WrapLine(const s: WideString);
var
i, cur, beg, last, LoopPos: Integer;
WasBreak, CRLF: Boolean;
Dest1, Dest2, Dest3, Dest4: PWideChar;
function Is1013(wc:WideChar): boolean;
begin
GetMem(Dest1,2); GetMem(Dest2,2);
try
StringToWideChar(#10,Dest1,2);
StringToWideChar(#13,Dest2,2);
Result := (wc=Dest1^) or (wc=Dest2^);
finally
FreeMem(Dest1); FreeMem(Dest2);
end;
end;
function GIsSpace(wc:WideChar): boolean;
begin
GetMem(Dest1,2); GetMem(Dest2,2); GetMem(Dest3,2); GetMem(Dest4,2);
try
StringToWideChar(' ',Dest1,2);
StringToWideChar('.',Dest2,2);
StringToWideChar(',',Dest3,2);
StringToWideChar('-',Dest4,2);
Result := (wc=Dest1^) or (wc=Dest2^) or (wc=Dest3^) or (wc=Dest4^) ;
finally
FreeMem(Dest1); FreeMem(Dest2); FreeMem(Dest3); FreeMem(Dest4);
end;
end;
begin
CRLF := False;
LoopPos := 0;
for i := 1 to Length(s) do
//if s in [#10, #13] then //original
if Is1013(s) then
begin
CRLF := True;
break;
end;
last := 1; beg := 1;
if not CRLF and ((Length(s) <= 1) or (WCanvas.TextWidth(s) <= maxwidth)) then
OutLine(s + #1)
else
begin
cur := 1;
while cur <= Length(s) do
begin
if Is1013(s[cur]) then
begin
OutLine(Copy(s, beg, cur - beg) + #1);
while (cur < Length(s)) and Is1013(s[cur]) do Inc(cur);
beg := cur; last := beg;
if Is1013(s[cur]) then
Exit else
continue;
end;
if s[cur] <> ' ' then
if WCanvas.TextWidth(Copy(s, beg, cur - beg + 1)) > maxwidth then
begin
WasBreak := False;
if (Flags and flWordBreak) <> 0 then
begin
i := cur;
while (i <= Length(s)) and not GIsSpace(s) do
Inc(i);
b := BreakWord(Copy(s, last + 1, i - last - 1));
if Length(b) > 0 then
begin
i := 1;
cur := last;
while (i <= Length(b)) and
(WCanvas.TextWidth(Copy(s, beg, last - beg + 1 + Ord(b)) + '-') <= maxwidth) do
begin
WasBreak := True;
cur := last + Ord(b);
Inc(i);
end;
last := cur;
end;
end
else
if last = beg then last := cur;
if WasBreak then
OutLine(Copy(s, beg, last - beg + 1) + '-')
else if s[last] = ' ' then
OutLine(Copy(s, beg, last - beg)) else
begin
OutLine(Copy(s, beg, last - beg));
Dec(last);
end;
if ((Flags and flWordBreak) <> 0) and not WasBreak and (last = cur - 1) then
if LoopPos = cur then
begin
beg := cur + 1;
cur := Length(s);
break;
end
else
LoopPos := cur;
beg := last + 1; last := beg;
end;
// if s[cur] in spaces then last := cur;
if s[cur] = ' ' then last := cur;
Inc(cur);
end;
if beg <> cur then OutLine(Copy(s, beg, cur - beg + 1) + #1);
end;
end;
