Release iText 7.1.6

iText 7.1.6 is the sixth maintenance release for iText 7.1 Core/Community. We're also updating the add-ons pdfHTML to 2.1.3, pdfCalligraph and pdfSweep to 2.0.4.

SVG support was greatly improved in this release. We now support elliptical paths, S/s and T/t commands for relative/absolute smooth cubic and relative/absolute smooth quadratic Bézier paths, and SVG transparency is also now supported.

In total, about 60 tickets were closed, many of which were of significant complexity.

iText Core/Community 7.1.6 for Java - for .NET

kernel

Improve text extraction with Type 3 fonts
Improve ToUnicode for Type0 fonts without subset
Preserve border, background and font for FormFields
Allow unknown annotation type in PdfAnnotation#makeAnnotation()

layout

Update a table's fixed-layout algorithm in case a negative width remains

sign

Embed OCSP response for all certificates in the chain in PdfSigner#signDetached
Improve OCSPVerifier responder certificate verification
Cover the case of updating LTV verification data of PDF when DSS does not contain VRI entry

svg

Fixed outstanding issue when handling closePath and moveTo that sometimes resulted in line-joins being applied incorrectly
Support S/s (relative/absolute smooth cubic Bézier path), and T/t (relative/absolute smooth quadratic Bézier path) commands
Transparency support - colors can have an alpha component, and objects can have a fill-opacity or stroke-opacity
Update of Text element handling to allow TSpan support + Initial TSpan support
Implement relative values for Svg Path commands C/L/M/S e. C(absolute), c(relative)
Added support for Elliptical paths

pdfHTML 2.1.3 for Java - for .NET

Improve handling of inline blocks with display:block
Do not reset the alignment for RTL elements if it's present
Fix anchor links handling with destinations on elements

pdfCalligraph 2.0.4 for Java - for .NET

Improved support for Bengali script

pdfSweep 2.0.4 for Java - for .NET

Added the ability to redact images with transparencies

Bug

[DEVSIX-1513] : pdfHTML incorrectly reuses fonts for input fields.
[DEVSIX-1827] : Fix infinite loop in typography.shaping.Shaper#applyAllFeaturesAtOnceOptimally on devanagari text processing.
[DEVSIX-2241] : SVG: fill-opacity not working.
[DEVSIX-2022] : PdfCleanup does not redact transparent images.
[DEVSIX-2069] : AcroFormField filled with Hebrew - Wrong glyphs.
[DEVSIX-2190] : Text inside text tags is not picked up and processed.
[DEVSIX-2344] : SVG: wrong output for line commands with negative values with close path (z).
[DEVSIX-2367] : SVG: String index out of range: 0.
[DEVSIX-2393] : PdfFormField Appearance: new line.
[DEVSIX-2477] : Text is processed incorrectly in SVG.
[DEVSIX-2545] : Avoid breaking a line at a hyphen when it is used as a date separator.
[DEVSIX-2616] : Specific certificate validation failed.
[DEVSIX-2625] : PDFs with wrong /Contents content are failed to be closed correctly.
[DEVSIX-2642] : final Arabic characters in isolated form when they should be final, and vice versa.
[DEVSIX-2644] : Remove excess xref entries in copying XObject.
[DEVSIX-2646] : Exception - Tag structure flushing failed: it might be corrupted.
[DEVSIX-2651] : Avoid breaking a line at an hyphen used to denote a minus sign.
[DEVSIX-2659] : When creating a digital signature the iText Library does not embed the OCSP response for whole chain.
[DEVSIX-2674] : Dictionary Key is not a name exception thrown on seemingly valid PDF invoice.
[DEVSIX-2681] : layout + pdfCalligraph + html2pdf : Page counter changes its content which has been used by pdfCalligraph to update bidi levels.
[DEVSIX-2683] : Signature Dictionaries can only contain valid PDF objects.
[DEVSIX-2684] : Duplication values for PDF extract texting..
[DEVSIX-2696] : pdfCalligraph : iText fails on text with undefined direction.
[DEVSIX-2700] : Problems with conjuncts in bengali text.
[DEVSIX-2710] : OCSPVerifier.Verify method checks the expiration date of the response issuer certificate based on the current date.
[DEVSIX-2717] : Include styled-xml-parser and svg in iText 7 ReadMe.
[DEVSIX-2718] : SVG<path>: tops of figures in image are ?ut.
[DEVSIX-2721] : Validation conflicts between Adobe and iText PDFA3.
[DEVSIX-2741] : Not setting of black color explicitly causes wrong colors on forms flattening.
[DEVSIX-2751] : Font color isn't set for form fields having both Comb flag and positive MaxLen value.
[DEVSIX-2773] : The issue is that iText loosing spaces during text extraction. The example below is using enclosed PDF file..
[DEVSIX-2774] : HTML anchor links not working for destinations assigned to elements handled by SpanTagWorker.
[DEVSIX-2777] : layout : in different classes iText uses different criteria to consider a font to be bold.
[DEVSIX-2819] : pdfCalligraph : ZWNJ is not processed correctly.
[DEVSIX-2826] : Append Mode: /Name entry in catalog not marked as modified when files have been attached to a document.
[DEVSIX-2830] : All page annotation objects are updated in append mode if page#getAnnotations is called.
[DEVSIX-2806] : pdfHTML: do no reset the alignment for RTL elements if it's present
[DEVSIX-2809] : typography: process Bengali-e letter correctly in the beginning of a word

New features

[DEVSIX-2611] : SVG paths: smooth curves (S and T operator).

Tasks

[DEVSIX-2267] : Implement relative values for Svg Path instruction C/L/M/S e. C(absalute), c(relative).
[DEVSIX-2268] : SVG: Paths A operator.
[DEVSIX-2271] : SVG: Tspan element.
[DEVSIX-2479] : SVG: Support (x y)+ parameters in moveTo operator.
[DEVSIX-2505] : Add basic tests for deferred signing in `sign` module.
[DEVSIX-2656] : Investigate use of MethodHandle in iText 7.
[DEVSIX-2775] : Investigate cmap resources in io.

Improvement

[DEVSIX-2457] : FormField setValue shall keep text color.
[DEVSIX-2590] : support transparency in SVG: rgba and opacity.
[DEVSIX-2594] : Handle nonivertible matrices differently: ignore the content after them rather than throw an exception.
[DEVSIX-2610] : PdfA + barcodes : there is no way of setting the barcode's font.
[DEVSIX-2637] : Improve memory usage for FontRegisterProvider#registerFont() .
[DEVSIX-2650] : Make PdfPage more tolerable to invalid Media Box entries.
[DEVSIX-2711] : Fixed layout algorithm processes percent-values incorrectly.
[DEVSIX-2737] : Inherit MaxLen property for from fields.
[DEVSIX-2744] : Improve SignatureUtil#verifySignature and #signatureCoversWholeDocument documentation.
[DEVSIX-2746] : html2pdf : support images with display: block inside a paragraph.
[DEVSIX-2753] : pdfHTML : iText should default input tags with invalid type.
[DEVSIX-2780] : Fix ToUnicode stream generation in case full font.