void DjVuSource::ReadAnnotations(GP<ByteStream> pInclStream,
set<GUTF8String>& processed, GP<ByteStream> pAnnoStream)
{
// Look for shared annotations
GUTF8String strInclude;
char buf[1024];
int nLength;
while ((nLength = pInclStream->read(buf, 1024)))
strInclude += GUTF8String(buf, nLength);
// Eat '\n' in the beginning and at the end
while (strInclude.length() > 0 && strInclude[0] == '\n')
strInclude = strInclude.substr(1, static_cast<unsigned int>(-1));
while (strInclude.length() > 0 && strInclude[static_cast<int>(strInclude.length()) - 1] == '\n')
strInclude.setat(strInclude.length() - 1, 0);
if (strInclude.length() > 0 && processed.find(strInclude) == processed.end())
{
processed.insert(strInclude);
GURL urlInclude = m_pDjVuDoc->id_to_url(strInclude);
GP<DataPool> pool = m_pDjVuDoc->request_data(NULL, urlInclude);
GP<ByteStream> stream = pool->get_stream();
GP<IFFByteStream> iff(IFFByteStream::create(stream));
// Check file format
GUTF8String chkid;
if (!iff->get_chunk(chkid) ||
(chkid != "FORM:DJVI" && chkid != "FORM:DJVU" &&
chkid != "FORM:PM44" && chkid != "FORM:BM44"))
{
return;
}
// Find chunk with page info
while (iff->get_chunk(chkid) != 0)
{
GP<ByteStream> chunk_stream = iff->get_bytestream();
if (chkid == "INCL")
{
ReadAnnotations(pInclStream, processed, pAnnoStream);
}
else if (chkid == "FORM:ANNO")
{
pAnnoStream->copy(*chunk_stream);
}
else if (chkid == "ANTa" || chkid == "ANTz")
{
const GP<IFFByteStream> iffout = IFFByteStream::create(pAnnoStream);
iffout->put_chunk(chkid);
iffout->copy(*chunk_stream);
iffout->close_chunk();
}
iff->seek_close_chunk();
}
}
}
void
lt_XMLParser::Impl::ChangeText(
const int width, const int height,
DjVuFile &dfile, const lt_XMLTags &tags )
{
dfile.resume_decode(true);
GP<DjVuText> text = DjVuText::create();
GP<DjVuTXT> txt = text->txt = DjVuTXT::create();
// to store the new text
GP<ByteStream> textbs = ByteStream::create();
GP<DjVuInfo> info=(dfile.info);
if(info)
{
const int h=info->height;
const int w=info->width;
txt->page_zone.text_start = 0;
DjVuTXT::Zone &parent=txt->page_zone;
parent.rect.xmin=0;
parent.rect.ymin=0;
parent.rect.ymax=h;
parent.rect.xmax=w;
double ws=1.0;
if(width && width != w)
{
ws=((double)w)/((double)width);
}
double hs=1.0;
if(height && height != h)
{
hs=((double)h)/((double)height);
}
make_child_layer(parent, tags, *textbs, h, ws,hs);
textbs->write8(0);
long len = textbs->tell();
txt->page_zone.text_length = len;
textbs->seek(0,SEEK_SET);
textbs->read(txt->textUTF8.getbuf(len), len);
dfile.change_text(txt,false);
}
}
void
analyze_incl_chunk(const GURL &url)
{
GP<ByteStream> gbs = ByteStream::create(url,"rb");
char buffer[24];
memset(buffer, 0, sizeof(buffer));
gbs->read(buffer,sizeof(buffer));
char *s = buffer;
if (!strncmp(s, "AT&T", 4))
s += 4;
if (strncmp(s, "FORM", 4) || strncmp(s+8, "DJVI", 4))
G_THROW("Expecting a valid FORM:DJVI chunk in the included file");
gbs->seek(0);
GP<IFFByteStream> giff=IFFByteStream::create(gbs);
GUTF8String chkid;
giff->get_chunk(chkid); // FORM:DJVI
for(; giff->get_chunk(chkid); giff->close_chunk())
if (chkid=="Djbz")
analyze_djbz_chunk(giff->get_bytestream());
}
