FX_WCHAR FX_GetMirrorChar(FX_WCHAR wch, FX_BOOL bRTL, FX_BOOL bVertical) {
FX_DWORD dwProps = FX_GetUnicodeProperties(wch);
FX_DWORD dwTemp = (dwProps & 0xFF800000);
if (bRTL && dwTemp < 0xFF800000) {
size_t idx = dwTemp >> 23;
if (idx < kFXTextLayoutBidiMirrorSize) {
wch = kFXTextLayoutBidiMirror[idx];
dwProps = FX_GetUnicodeProperties(wch);
}
}
bool CFX_BidiChar::AppendChar(FX_WCHAR wch) {
uint32_t dwProps = FX_GetUnicodeProperties(wch);
int32_t iBidiCls = (dwProps & FX_BIDICLASSBITSMASK) >> FX_BIDICLASSBITS;
Direction direction = NEUTRAL;
switch (iBidiCls) {
case FX_BIDICLASS_L:
case FX_BIDICLASS_AN:
case FX_BIDICLASS_EN:
direction = LEFT;
break;
case FX_BIDICLASS_R:
case FX_BIDICLASS_AL:
direction = RIGHT;
break;
}
bool bChangeDirection = (direction != m_CurrentSegment.direction);
if (bChangeDirection)
StartNewSegment(direction);
m_CurrentSegment.count++;
return bChangeDirection;
}
wchar_t GetFormChar(wchar_t wch, wchar_t prev, wchar_t next) {
CFX_Char c(wch, FX_GetUnicodeProperties(wch));
CFX_Char p(prev, FX_GetUnicodeProperties(prev));
CFX_Char n(next, FX_GetUnicodeProperties(next));
return GetFormChar(&c, &p, &n);
}
FX_BOOL FX_IsCtrlCode(FX_WCHAR ch) {
FX_DWORD dwRet = (FX_GetUnicodeProperties(ch) & FX_CHARTYPEBITSMASK);
return dwRet == FX_CHARTYPE_Tab || dwRet == FX_CHARTYPE_Control;
}
