diff options
| author | Katarina Behrens <Katarina.Behrens@cib.de> | 2019-01-31 17:18:36 +0100 |
|---|---|---|
| committer | Thorsten Behrens <Thorsten.Behrens@CIB.de> | 2019-02-06 16:46:09 +0100 |
| commit | 9547c0edef9a48937e4d9651a840c49481a4fbd9 (patch) | |
| tree | a97332849087ccfd61c13d02342783cdedae83f3 | |
| parent | bd66a0201fb6d1a127139287cc8b5bd27e3a92c3 (diff) | |
Export background images provided by master page as artifacts
Such that screenreaders don't announce them. To make this happen,
pass them as NonStructElement to PDF writer.
Change-Id: I94d52ee0207cd6362edabfb9b891faa7fe341543
| -rw-r--r-- | drawinglayer/source/processor2d/vclmetafileprocessor2d.cxx | 36 |
1 files changed, 6 insertions, 30 deletions
diff --git a/drawinglayer/source/processor2d/vclmetafileprocessor2d.cxx b/drawinglayer/source/processor2d/vclmetafileprocessor2d.cxx index 71a6125e2ff1..60f45740b66a 100644 --- a/drawinglayer/source/processor2d/vclmetafileprocessor2d.cxx +++ b/drawinglayer/source/processor2d/vclmetafileprocessor2d.cxx @@ -2217,38 +2217,14 @@ namespace drawinglayer { // structured tag primitive const vcl::PDFWriter::StructElement& rTagElement(rStructureTagCandidate.getStructureElement()); - bool bTagUsed(vcl::PDFWriter::NonStructElement != rTagElement); + const bool bTagUsed(vcl::PDFWriter::NonStructElement != rTagElement); + const bool bIsBackground(rStructureTagCandidate.isBackground()); - //Z For now, just do not create StructureTag(s) for hidden/background - // (Graphic)Objects - see '/Artifact' comments below - if(bTagUsed && rStructureTagCandidate.isBackground()) + if(mpPDFExtOutDevData && bTagUsed) { - bTagUsed = false; - } - - if(mpPDFExtOutDevData && bTagUsed) - { - // write start tag - mpPDFExtOutDevData->BeginStructureElement(rTagElement); - - // if(rStructureTagCandidate.isBackground()) - // { - // //Z need to somehow apply '/Artifact' information... - // // - Already experimented with adding two BeginStructureElement adding - // // a 'vcl::PDFWriter::Artifact' -> not really what e.g. PAC3 expects. - // // - May also be adding someting using 'SetStructureAttribute' and - // // extending vcl::PDFWriter::StructAttribute... - // // - Simple solution for now (see above): Just do not create - // // StructureTag(s) for hidden/background (Graphic)Objects. That - // // works, shows all content in PDF renderers, but hides in - // // TaggedStructure. But: also not visible in PAC3's 'LogicalStructure' - // // View where there is a tab for 'Artifacts' - I *guess* a correctly - // // tagged '/Artifact' should appear there. - // // Unfortunately found no real example - there is https://www.w3.org/TR/WCAG20-TECHS/PDF4.html - // // which claims to have an example in - // // https://www.w3.org/WAI/WCAG20/Techniques/working-examples/PDF4/decorative-image.docx - // // but that file has no '/Artifact' entries at all... - // } + // Write start tag. For background elements use NonStructElement instead of real element type (e.g. Figure) + // to guarantee it gets exported as artifact (tagged PDF) + mpPDFExtOutDevData->BeginStructureElement(bIsBackground ? vcl::PDFWriter::NonStructElement : rTagElement); } // process children normally |