UT_uint32 PD_DocIterator::find(UT_TextIterator & text, UT_uint32 iLen, bool bForward)
{
if(text.getStatus() != UTIter_OK)
{
m_status = UTIter_OutOfBounds;
return 0;
}
UT_sint32 iInc = bForward ? 1 : -1;
UT_uint32 iOrigPos = text.getPosition();
while(getStatus() == UTIter_OK)
{
UT_UCS4Char What = text.getChar();
// find the first character ...
while(getStatus() == UTIter_OK && getChar() != What)
(*this) += iInc;
if(getStatus() != UTIter_OK) // we are past the end
return 0;
UT_uint32 i = 1;
while(i < iLen)
{
// cmp next pair
text += iInc;
if(text.getStatus() != UTIter_OK)
{
// there are fewer chars then we were led to believe
m_status = UTIter_OutOfBounds;
return 0;
}
What = text.getChar();
(*this) += iInc;
if(getStatus() != UTIter_OK) // we are past the end
return 0;
if(getChar() != What) //hard luck, try again
break;
// good, lets try the next pair
i++;
}
if(i == iLen) // that was the last char, return ...
return getPosition() - iLen + 1;
// too bad, start over again
UT_return_val_if_fail ( i < iLen,0 );
(*this) += iInc;
text.setPosition(iOrigPos);
}
UT_return_val_if_fail (getStatus() != UTIter_OK , 0);
return 0;
}
bool GR_Graphics::itemize(UT_TextIterator & text, GR_Itemization & I)
{
UT_return_val_if_fail(text.getStatus() == UTIter_OK, false);
I.clear();
UT_uint32 iCurOffset = 0, iLastOffset = 0;
UT_uint32 iPosStart = text.getPosition();
// the main loop that will span the whole text of the iterator
while(text.getStatus() == UTIter_OK)
{
UT_BidiCharType iPrevType, iLastStrongType = UT_BIDI_UNSET, iType;
UT_UCS4Char c = text.getChar();
UT_return_val_if_fail(text.getStatus() == UTIter_OK, false);
iType = UT_bidiGetCharType(c);
#if 0
// this branch of code breaks at all direction bounaries
// it is disabled because doing that causes bug 8099
iCurOffset = iLastOffset = text.getPosition();
++text;
// this loop will cover a single homogenous item
while(text.getStatus() == UTIter_OK)
{
iPrevType = iType;
c = text.getChar();
UT_return_val_if_fail(text.getStatus() == UTIter_OK, false);
// remember the offset
iLastOffset = text.getPosition();
iType = UT_bidiGetCharType(c);
if(iType != iPrevType)
{
break;
}
++text;
}
#else
//we have to break the text into chunks that each will go into a
//separate run in a manner that will ensure that the text will
//be correctly processed later. The most obvious way is to
//break every time we encounter a change of directional
//properties. Unfortunately that means breaking at each white
//space, which adds a huge amount of processing due to
//allocating and deleting runs when loading a
//document. The following code tries to catch out the obvious
//cases when the span can remain intact. Tomas, Jan 28, 2003
// remember where we are ...
iCurOffset = iLastOffset = text.getPosition();
++text;
UT_BidiCharType iNextType;
// this loop will cover a single homogenous item
while(text.getStatus() == UTIter_OK)
{
iPrevType = iType;
if(UT_BIDI_IS_STRONG(iType))
iLastStrongType = iType;
c = text.getChar();
UT_return_val_if_fail(text.getStatus() == UTIter_OK, false);
// remember the offset
iLastOffset = text.getPosition();
++text;
iType = UT_bidiGetCharType(c);
if(iType != iPrevType)
{
// potential direction boundary see if we can ignore
// it
bool bIgnore = false;
#if 0
// this assumption is not true; for instance in the
// sequence ") " the parenthesis and the space can
// resolve to different directions
//
// I am leaving it here so that I do not add it one
// day again (Tomas, Apr 10, 2003)
if(UT_BIDI_IS_NEUTRAL(iPrevType) && UT_BIDI_IS_NEUTRAL(iType))
{
// two neutral characters in a row will have the same
// direction
xxx_UT_DEBUGMSG(("GR_Graphics::itemize: ntrl->ntrl (c=0x%04x)\n",c));
bIgnore = true;
}
else
#endif
if(UT_BIDI_IS_STRONG(iPrevType) && UT_BIDI_IS_NEUTRAL(iType))
{
// we can ignore a neutral character following a
// strong one if it is followed by a strong
// character of identical type to the previous one
xxx_UT_DEBUGMSG(("GR_Graphics::itemize: strong->ntrl (c=0x%04x)\n",c));
// take a peek at what follows
UT_uint32 iOldPos = text.getPosition();
while(text.getStatus() == UTIter_OK)
{
UT_UCS4Char c2 = text.getChar();
UT_return_val_if_fail(text.getStatus() == UTIter_OK, false);
++text;
iNextType = UT_bidiGetCharType(c2);
xxx_UT_DEBUGMSG(("GR_Graphics::itemize: iNextType 0x%04x\n", iNextType));
if(iNextType == iPrevType)
{
bIgnore = true;
break;
}
// if the next character is strong, we cannot
// ignore the boundary
if(UT_BIDI_IS_STRONG(iNextType))
break;
}
// restore position
text.setPosition(iOldPos);
}
else if(UT_BIDI_IS_NEUTRAL(iPrevType) && UT_BIDI_IS_STRONG(iType))
{
// a neutral character followed by a strong one -- we
// can ignore it, if the neutral character was
// preceeded by a strong character of the same
// type
if(iType == iLastStrongType)
{
bIgnore = true;
}
xxx_UT_DEBUGMSG(("GR_Graphics::itemize: ntrl->strong (c=0x%04x)\n",c));
}
else
{
// in all other cases we will split
xxx_UT_DEBUGMSG(("GR_Graphics::itemize: other (c=0x%04x)\n",pSpan[i]));
}
xxx_UT_DEBUGMSG(("GR_Graphics::itemize: bIgnore %d\n",static_cast<UT_uint32>(bIgnore)));
if(!bIgnore)
break;
}
}
#endif
I.addItem(iCurOffset - iPosStart, new GR_XPItem(GRScriptType_Undefined));
}
// add an extra record of type Void to allow for calculation of
// length of the last item
// iLastOffset is the offset of the last valid character; the Void
// offset is one beyond that
I.addItem(iLastOffset - iPosStart + 1, new GR_XPItem(GRScriptType_Void));
return true;
}
