Add an accessor for the symbol's text object

[Dmitry Panteleev]

Hello Pdfium devs,

Looks like currently it is not possible to find the text object which contains a symbol using the public API. If text overlaps, it means that is not trivial to create a tree above it if we need some acess to mcid. 

is it ok if I expose 

FPDF_EXPORT FPDF_PAGEOBJECT FPDF_CALLCONV FPDFText_GetTextObject(FPDF_TEXTPAGE text_page,  int index) {

  // ...
  const CPDF_TextPage::CharInfo& charinfo = textpage->GetCharInfo(index);

  return FPDFPageObjectFromCPDFPageObject(charinfo.m_pTextObj.get());
}

in the public api? 

[geisserml]

Currently the only way to get a text pageobject is through FPDFPage_GetObject() or FPDFPageObj_NewTextObj(), right?

[Dmitry Panteleev]

Yes, looks like the only one which returns an object (without modifying things) is FPDFPage_GetObject. But there are plenty of accessors which call textpage->GetCharInfo(index) to get text style or bounding box, so I don't see any harm in exposing the corresponding text object directly in API. 

[Lei Zhang]

I think this API should be ok. In some ways, it is similar to
FPDFAnnot_GetObject().

With this API, PDFium can remove FPDFText_GetTextRenderMode(), and the
embedder can call FPDFText_GetTextObject() followed by
FPDFTextObj_GetTextRenderMode() instead.

> --
> You received this message because you are subscribed to the Google Groups "pdfium" group.
> To unsubscribe from this group and stop receiving emails from it, send an email to pdfium+un...@googlegroups.com.
> To view this discussion on the web visit https://groups.google.com/d/msgid/pdfium/750c4dc3-cc7e-4b3b-b607-ca926a86e1e2n%40googlegroups.com.