/**
* Creates a CharacterProperties object from a chpx stored in the
* StyleDescription at the index istd in the StyleDescription array. The
* CharacterProperties object is placed in the StyleDescription at istd after
* its been Created. Not every StyleDescription will contain a chpx. In these
* cases this function does nothing.
*
* @param istd The index of the StyleDescription to create the
* CharacterProperties object from.
*/
private void CreateChp(int istd)
{
StyleDescription sd = _styleDescriptions[istd];
CharacterProperties chp = sd.GetCHP();
byte[] chpx = sd.GetCHPX();
int baseIndex = sd.GetBaseStyle();
if (baseIndex == istd)
{
// Oh dear, this isn't allowed...
// The word file seems to be corrupted
// Switch to using the nil style so that
// there's a chance we can read it
baseIndex = NIL_STYLE;
}
// Build and decompress the Chp if required
if (chp == null && chpx != null)
{
CharacterProperties parentCHP = new CharacterProperties();
if (baseIndex != NIL_STYLE)
{
parentCHP = _styleDescriptions[baseIndex].GetCHP();
if (parentCHP == null)
{
CreateChp(baseIndex);
parentCHP = _styleDescriptions[baseIndex].GetCHP();
}
}
chp = CharacterSprmUncompressor.UncompressCHP(parentCHP, chpx, 0);
sd.SetCHP(chp);
}
}
/**
* Creates a PartagraphProperties object from a papx stored in the
* StyleDescription at the index istd in the StyleDescription array. The PAP
* is placed in the StyleDescription at istd after its been Created. Not
* every StyleDescription will contain a papx. In these cases this function
* does nothing
*
* @param istd The index of the StyleDescription to create the
* ParagraphProperties from (and also place the finished PAP in)
*/
private void CreatePap(int istd)
{
StyleDescription sd = _styleDescriptions[istd];
ParagraphProperties pap = sd.GetPAP();
byte[] papx = sd.GetPAPX();
int baseIndex = sd.GetBaseStyle();
if (pap == null && papx != null)
{
ParagraphProperties parentPAP = new ParagraphProperties();
if (baseIndex != NIL_STYLE)
{
parentPAP = _styleDescriptions[baseIndex].GetPAP();
if (parentPAP == null)
{
if (baseIndex == istd)
{
// Oh dear, style claims that it is its own parent
throw new InvalidOperationException("Pap style " + istd + " claimed to have itself as its parent, which isn't allowed");
}
// Create the parent style
CreatePap(baseIndex);
parentPAP = _styleDescriptions[baseIndex].GetPAP();
}
}
pap = ParagraphSprmUncompressor.UncompressPAP(parentPAP, papx, 2);
sd.SetPAP(pap);
}
}