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Yuvraj Singh
f9f7ebe156
The xfa crate lays out the field kinds that were left blank or shown as text fields: - Choice lists become combo boxes (editable with textEntry) or list boxes (open="always"; multi-select with open="multiSelect"), with the shown items and the saved values of <items save="1"> as /Opt pairs, /V, /I and /DV as saved values, several on separate lines in the data. Field::saved_value maps shown text to saved values for the layout and the script tree alike, so scripts read what is saved. - Password fields are password text fields; signature fields are /Sig fields the app can sign. - Image fields show the picture the data (base64) or the template holds; barcode fields show their value as text, with a warning that no bars are drawn. - PNG and GIF pictures (fields and draws) are decoded to Flate image XObjects with a soft mask for transparency; JPEGs stay as they were. Sizes come from the headers, so layout never decodes; decoding is capped at 40 million pixels and failures are warnings, not errors. Engine: multi-select list values from scripts and data are one per line. README and parity notes updated (form.xfa-dynamic). Hardened after an adversarial review pass: picture sizes refused from the header past 20 million pixels or 65,535 a side, the GIF decoder given limits (a frame far larger than its screen is refused before allocation), template pictures read whole up to 32 MB, pictures decoded once and remembered in the catalog by content hash so re-layouts reuse them, data pictures that aren't images reported by field; choice values matched against saved values first, several values deduplicated and capped, /I ascending and unique, /DV through the same mapping, <value> children read, the item cap reported; the reopen path takes another viewer's choice values (several per line); CMYK JPEGs inverted only with Adobe APP14.