fix Purpose comment

[wxWidgets.git] / src / common / unichar.cpp

diff --git a/src/common/unichar.cpp b/src/common/unichar.cpp
index 4bfb6277b80ac697c6349cc80983f33a7eaacd37..163d388744634e4fd5d9645981f7a193803ee334 100644 (file)
--- a/src/common/unichar.cpp
+++ b/src/common/unichar.cpp
@@ -36,14 +36,12 @@
 // ---------------------------------------------------------------------------
 
 /* static */
-wxUniChar::value_type wxUniChar::From8bit(char c)
+wxUniChar::value_type wxUniChar::FromHi8bit(char c)
 {
-    // all supported charsets have the first 128 characters same as ASCII:
-    if ( (unsigned char)c < 0x80 )
-        return c;
-
 #if wxUSE_UTF8_LOCALE_ONLY
     wxFAIL_MSG( "invalid UTF-8 character" );
+    wxUnusedVar(c);
+
     return wxT('?'); // FIXME-UTF8: what to use as failure character?
 #else
     wchar_t buf[2];
@@ -57,14 +55,12 @@ wxUniChar::value_type wxUniChar::From8bit(char c)
 }
 
 /* static */
-char wxUniChar::To8bit(wxUniChar::value_type c)
+char wxUniChar::ToHi8bit(wxUniChar::value_type c)
 {
-    // all supported charsets have the first 128 characters same as ASCII:
-    if ( c < 0x80 )
-        return c;
-
 #if wxUSE_UTF8_LOCALE_ONLY
     wxFAIL_MSG( "character cannot be converted to single UTF-8 byte" );
+    wxUnusedVar(c);
+
     return '?'; // FIXME-UTF8: what to use as failure character?
 #else
     wchar_t in = c;
@@ -104,14 +100,13 @@ wxUniCharRef& wxUniCharRef::operator=(const wxUniChar& c)
         for ( size_t i = 0; i < lenNew; ++i, ++pos )
             *pos = utf[i];
     }
-    else
+    else // length of character encoding in UTF-8 changed
     {
         // the worse case is when the new value has either longer or shorter
         // code -- in that case, we have to use wxStringImpl::replace() and
         // this invalidates all iterators, so we have to update them too:
 
-        wxString& str = *wx_const_cast(wxString*, m_node.m_str);
-        wxStringImpl& strimpl = str.m_impl;
+        wxStringImpl& strimpl = m_str.m_impl;
 
         int iterDiff = lenNew - lenOld;
         size_t posIdx = m_pos - strimpl.begin();
@@ -125,7 +120,7 @@ wxUniCharRef& wxUniCharRef::operator=(const wxUniChar& c)
         size_t *indexes = indexes_a;
         size_t iterNum = 0;
         wxStringIteratorNode *it;
-        for ( it = str.m_iterators.ptr; it; it = it->m_next, ++iterNum )
+        for ( it = m_str.m_iterators.ptr; it; it = it->m_next, ++iterNum )
         {
             wxASSERT( it->m_iter || it->m_citer );
 
@@ -153,10 +148,14 @@ wxUniCharRef& wxUniCharRef::operator=(const wxUniChar& c)
         // update the string:
         strimpl.replace(m_pos, m_pos + lenOld, utf, lenNew);
 
+#if wxUSE_STRING_POS_CACHE
+        m_str.InvalidateCache();
+#endif // wxUSE_STRING_POS_CACHE
+
         // finally, set the iterators to valid values again (note that this
         // updates m_pos as well):
         size_t i;
-        for ( i = 0, it = str.m_iterators.ptr; it; it = it->m_next, ++i )
+        for ( i = 0, it = m_str.m_iterators.ptr; it; it = it->m_next, ++i )
         {
             wxASSERT( i < iterNum );
             wxASSERT( it->m_iter || it->m_citer );