[latex3-commits] [git/LaTeX3-latex3-pdfresources] develop, main: add tagging to fields (fdb74cc)
Ulrike Fischer
fischer at troubleshooting-tex.de
Mon Jun 14 16:01:42 CEST 2021
Repository : https://github.com/latex3/pdfresources
On branches: develop,main
Link : https://github.com/latex3/pdfresources/commit/fdb74cc882a9530a11698330a7c623aa28522e2e
>---------------------------------------------------------------
commit fdb74cc882a9530a11698330a7c623aa28522e2e
Author: Ulrike Fischer <fischer at troubleshooting-tex.de>
Date: Mon Jun 14 16:01:42 2021 +0200
add tagging to fields
>---------------------------------------------------------------
fdb74cc882a9530a11698330a7c623aa28522e2e
l3pdffield.dtx | 49 +++
testfiles/calculate-textfield.xetex.tpf | 18 +-
testfiles/tag-checkbox.luatex.tpf | 242 +++++++++++
testfiles/{textfield.pvt => tag-checkbox.pvt} | 11 +-
testfiles/tag-checkbox.tpf | 555 ++++++++++++++++++++++++++
testfiles/tag-checkbox.xetex.tpf | 203 ++++++++++
6 files changed, 1065 insertions(+), 13 deletions(-)
diff --git a/l3pdffield.dtx b/l3pdffield.dtx
index eca3ff3..c699352 100644
--- a/l3pdffield.dtx
+++ b/l3pdffield.dtx
@@ -238,6 +238,26 @@
% are related in a form field. Tests with some PDF viewers
% are needed here.
%
+% \subsection{Tagged PDF}
+%
+% Field annotations are (like link annotations) not part of the page stream. But
+% they are obviously nevertheless meaningful content and must be consider if
+% a PDF is \enquote{tagged}, that means if a structure is added.
+%
+% According to the PDF references fields should be tagged by adding a |Form| structure
+% element containing the object reference to a field annotations. Fields with more than
+% one annotation like radio buttons need a |Form| structure for every one.
+% Additional some cross references to structure relevant object like the parent tree
+% are needed, for more info check the documentation of the \pkg{tagpdf} package.
+%
+% The commands of this module already contain the needed support. So if
+% \pkg{tagpdf} is used and tagging activated the fields will be added as |Form| element
+% to the structure where they are created. It is possible to deactivate tagging for
+% a field annotation by setting the |tag| to false as described below.
+%
+% It is recommended to use the |TU|/|altname| key to give the field a readable
+% name.
+%
%
% \section{Commands}
% \begin{function}{\pdffield_field:nn,\pdffield_field:Vn}
@@ -966,6 +986,7 @@
% ,\g_@@_CO_sortkeys_prop
% ,\l_@@_CO_sortkey_str
% ,\g_@@_annot_ref_last_tl
+% ,\l_@@_tag_bool
% }
% Some tmp variables, and a variable for the current parent and the
% current fieldID.
@@ -983,6 +1004,7 @@
\seq_new:N \g_@@_CO_sortkeys_seq
\str_new:N \l_@@_CO_sortkey_str
\tl_new:N \g_@@_annot_ref_last_tl
+\bool_new:N \l_@@_tag_bool
% \end{macrocode}
% \end{variable}
%
@@ -1241,6 +1263,7 @@
\bitset_set_false:Nn \l_@@_F_bitset {NoView}
}
\pdfannot_dict_put:nnx {widget}{F}{ \bitset_to_arabic:N \l_@@_F_bitset }
+ \@@_tag_add_struct_parent:
\tl_if_empty:NF \l_@@_currentparent_tl
{
\exp_args:Ne
@@ -1268,6 +1291,7 @@
\hfill
}
\tl_gset:Nx \g_@@_annot_ref_last_tl { \pdfannot_box_ref_last: }
+ \exp_args:NV \@@_tag_add_objr:n \g_@@_annot_ref_last_tl
\tl_if_empty:NF \l_@@_currentparent_tl
{
\seq_if_exist:cTF {g_@@_field/Kids/\l_@@_currentparent_tl _seq}
@@ -1296,6 +1320,31 @@
\cs_new:Npn \pdffield_annot_ref_last: { \g_@@_annot_ref_last_tl }
% \end{macrocode}
% \end{macro}
+% \subsection{Tagging}
+% \begin{macro}{\@@_tag_add_struct_parent:,\@@_tag_add_objr:n}
+% \begin{macrocode}
+\cs_new_protected:Npn \@@_tag_add_struct_parent: {}
+\cs_new_protected:Npn \@@_tag_add_objr:n #1 {}
+\hook_gput_code:nnn {begindocument} { l3pdffield }
+ {
+ \cs_if_exist:NT \tag_if_active:T
+ {
+ \tag_if_active:T
+ {
+ \cs_set_protected:Npn \@@_tag_add_struct_parent:
+ {
+ \pdfannot_dict_put:nnx {widget}{StructParent}{ \tag_struct_parent_int: }
+ }
+ \cs_set_protected:Npn \@@_tag_add_objr:n #1
+ {
+ \exp_args:Nnx
+ \tag_struct_insert_annot:nn {#1}{ \tag_struct_parent_int: }
+ }
+ }
+ }
+}
+% \end{macrocode}
+% \end{macro}
% \subsection{auxiliary command for color keys}
% \begin{macro}{\@@_color_set:nn }
% \begin{macrocode}
diff --git a/testfiles/calculate-textfield.xetex.tpf b/testfiles/calculate-textfield.xetex.tpf
index 98c4fbd..ce9de27 100644
--- a/testfiles/calculate-textfield.xetex.tpf
+++ b/testfiles/calculate-textfield.xetex.tpf
@@ -107,7 +107,7 @@ endobj
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endobj
2 0 obj
-<</Creator( XeTeX output 2016.05.20:0900)/Producer(xdvipdfmx \(20210318\))/CreationDate(D:20160520090000-00'00')>>
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endobj
1 0 obj
<</Lang(en-US)/AcroForm 30 0 R/Pages 33 0 R/Type/Catalog>>
@@ -163,7 +163,7 @@ endobj
xref
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@@ -172,8 +172,8 @@ xref
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@@ -197,13 +197,13 @@ xref
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trailer
<</ID[<ID-STRING><ID-STRING>]/Root
1 0 R/Info 2 0 R/Size 39>>
startxref
-4617
+4607
%%EOF
diff --git a/testfiles/tag-checkbox.luatex.tpf b/testfiles/tag-checkbox.luatex.tpf
new file mode 100644
index 0000000..0f331a0
--- /dev/null
+++ b/testfiles/tag-checkbox.luatex.tpf
@@ -0,0 +1,242 @@
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diff --git a/testfiles/textfield.pvt b/testfiles/tag-checkbox.pvt
similarity index 69%
copy from testfiles/textfield.pvt
copy to testfiles/tag-checkbox.pvt
index 51fabee..9c7d14c 100644
--- a/testfiles/textfield.pvt
+++ b/testfiles/tag-checkbox.pvt
@@ -5,14 +5,17 @@
\RequirePackage{pdfmanagement-regressiontest}
\documentclass{article}
+\usepackage{tagpdf}
\usepackage{l3pdffield-testphase}
-\begin{document}%\showoutput
-\START
+\tagpdfsetup{activate-all,paratagging}
+\begin{document}
+
+aaaa
\ExplSyntaxOn
-\pdffield_textfield:n{name=date,width=4cm,setfieldflags={comb},MaxLen=10}
+\pdffield_checkbox:n{name=a}
\ExplSyntaxOff
-
+bbbb
\end{document}
diff --git a/testfiles/tag-checkbox.tpf b/testfiles/tag-checkbox.tpf
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