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author | Karl Berry <karl@freefriends.org> | 2018-07-05 21:45:46 +0000 |
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committer | Karl Berry <karl@freefriends.org> | 2018-07-05 21:45:46 +0000 |
commit | eef245751e7d3cec3ce8db3dda9f93818e1a7118 (patch) | |
tree | 995036273168036838cec88e6ff67d05b7942319 /Master/texmf-dist/tex/latex/tagpdf/tagpdf-mc-code-lua.sty | |
parent | f8fda7824b2b8cdebc2f57a8dc1aefdec29b14e9 (diff) |
tagpdf (5jul18)
git-svn-id: svn://tug.org/texlive/trunk@48146 c570f23f-e606-0410-a88d-b1316a301751
Diffstat (limited to 'Master/texmf-dist/tex/latex/tagpdf/tagpdf-mc-code-lua.sty')
-rw-r--r-- | Master/texmf-dist/tex/latex/tagpdf/tagpdf-mc-code-lua.sty | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/Master/texmf-dist/tex/latex/tagpdf/tagpdf-mc-code-lua.sty b/Master/texmf-dist/tex/latex/tagpdf/tagpdf-mc-code-lua.sty new file mode 100644 index 00000000000..0d8a66b12a1 --- /dev/null +++ b/Master/texmf-dist/tex/latex/tagpdf/tagpdf-mc-code-lua.sty @@ -0,0 +1,172 @@ +\ProvidesExplFile {tagpdf-mc-code-lua.sty} {2018/07/04} {0.1} + {tagpdf - mc code only for the luamode } + +%the two attibutes are defined in the driver file. +%it also load the lua (as it can also contain functions needed by generic mode. +%\newattribute \g__uftag_mc_type_attr %the value represent the type +%\newattribute \g__uftag_mc_cnt_attr %will hold the \c@g__uftag_MCID_abs_int value + +%An attribute for the current structure probably doesn't make sense as mc chunks can be used later. +%\newattribute \g__uftag_struct_type_attr %represent the current structure type. Not sure if needed +%\newattribute \g__uftag_struct_cnt_attr %will hold \c@g__uftag_struct_abs_int a cnt + +% handling attribute needs a different system to number the page wise mcid's: +% a tagmcbegin ... tagmcend pair no longer surrounds exactly one mc chunk: it can be split +% at page breaks. We know the included mcid(s) only after the ship out. So for the struct-> mcid mapping we +% need to record struct -> mc-cnt (in \g__uftag_mc_parenttree_prop and/or a lua table +% and at shipout mc-cnt-> {mcid, mcid, ...} (in a table?) +% and when building the trees connect both + +% key definitions are overwritten for luatex to store that data in tables +% the data for the mc are in uftag.mc[absnum] +% the fields of the table are +% tag : the type (a string) +% raw : more properties (string) +% label: a string. Do we need a way to retrieve the num from the label from lua?? +% artifact: the presence indicates an artifact, the value (string) is the type. +% kids: a array of tables {1={kid=num2,page=pagenum1}, 2={kid=num2,page=pagenum2},...}, +% this describes the chunks the mc has been split to by the traversing code +% parent: the number of the structure it is in. Needed to build the parent tree. + +% The main function which wanders through the shipout box to inject the literals. +\AtBeginDocument +{ + \bool_if:NT\g_uftag_active_mc_bool + { + \AtBeginShipout + { + \directlua{uftag.func.mark_shipout ()} + } + } +} + +% the keys +\tl_new:N \l__uftag_mc_key_tag_tl +\tl_new:N \l__uftag_mc_key_label_tl +\tl_new:N \l__uftag_mc_key_properties_tl + +\keys_define:nn { tagpdf / mc } +{ + tag .code:n = % + { + \__uftag_pdf_escape_name:Nn \l__uftag_mc_key_tag_tl { #1 } + \directlua + { + uftag.func.store_mc_data(\__uftag_get_mc_abs_cnt:,"tag","#1") + } + }, + raw .code:n = + { + \tl_set:Nn\l__uftag_mc_key_properties_tl { #1 } + \directlua + { + uftag.func.store_mc_data(\__uftag_get_mc_abs_cnt:,"raw","#1") + } + }, + label .code:n = + { + \tl_set:Nn\l__uftag_mc_key_label_tl { #1 } + \directlua {uftag.func.store_mc_data(\__uftag_get_mc_abs_cnt:,"label","#1")} + }, + __artifact-store .code:n = + { + \directlua {uftag.func.store_mc_data(\__uftag_get_mc_abs_cnt:,"artifact","#1")} + }, + artifact .meta:n = { artifact-bool, artifact-type=#1,__artifact-store=#1, tag=Artifact }, + artifact .default:n = { notype } +} + + +% attributes +% set the mc from a tag name + +\cs_new:Nn \__uftag_mc_lua_gset_mc_type_attr:n % #1 is a tag name + { + \global\setattribute \g__uftag_mc_type_attr { \directlua {uftag.func.output_num_from ("#1") } } + \global\setattribute \g__uftag_mc_cnt_attr { \__uftag_get_mc_abs_cnt: } + } + +\cs_generate_variant:Nn\__uftag_mc_lua_gset_mc_type_attr:n { o } + +\cs_new:Nn \__uftag_mc_lua_gunset_mc_type_attr: + { + \global\unsetattribute \g__uftag_mc_type_attr + \global\unsetattribute \g__uftag_mc_cnt_attr + } + +%This command will in the finish code replace the dummy for a mc by the real mcid kids +\cs_new:Nn \__uftag_mc_insert_mcid_kids:n + { + \directlua {uftag.func.mc_insert_kids (#1) } + } + + +% puts an mcid absolute number in the current structure +\cs_new:Nn \__uftag_mc_handle_stash:n %1 mcidnum + { + \__uftag_check_mc_used:n { #1 } + \seq_gput_right:cn % Don't fill a lua table due to the command in the item, so the kernel command + { g__uftag_struct_kids_\g__uftag_struct_stack_current_tl _seq } + { + \__uftag_mc_insert_mcid_kids:n {#1} + } + \directlua + { + uftag.func.store_struct_mcabs(\g__uftag_struct_stack_current_tl,#1) + } + \prop_gput:Nxx + \g__uftag_mc_parenttree_prop + { #1 } + { \g__uftag_struct_stack_current_tl } + } + +\cs_generate_variant:Nn \__uftag_mc_handle_stash:n { o } + +\cs_new:Nn \uftag_mc_begin:n + { + \group_begin: + \__uftag_check_mc_if_nested: + \bool_gset_true:N \g__uftag_in_mc_bool + \int_gincr:N \c@g__uftag_MCID_abs_int + \keys_set:nn { tagpdf / mc }{ label={}, #1 } + %check that a tag or artifact has been used + \__uftag_check_mc_tag:N \l__uftag_mc_key_tag_tl + %set the attributes (is done globally!): + \__uftag_mc_lua_gset_mc_type_attr:o { \l__uftag_mc_key_tag_tl } + \bool_if:NF \l__uftag_mc_artifact_bool + { % store the absolute num name in a label: + \tl_if_empty:NF {\l__uftag_mc_key_label_tl} + { + \__uftag_mc_handle_mc_label:n { \l__uftag_mc_key_label_tl } + } + % if not stashed record the absolute number + \bool_if:NF \l__uftag_mc_key_stash_bool + { + \exp_args:Nx \__uftag_mc_handle_stash:n { \__uftag_get_mc_abs_cnt: } + } + } + \group_end: + } + +\cs_new:Nn\uftag_mc_end: + { + \__uftag_check_mc_if_open: + \bool_gset_false:N \g__uftag_in_mc_bool + \__uftag_mc_lua_gunset_mc_type_attr: + } + +\cs_new:Nn\uftag_mc_use:n %#1: label name + { + \tl_set:Nx \l_tmpa_tl { \zref@extractdefault{tagpdf-#1}{tagmcabs}{} } + \tl_if_empty:NTF\l_tmpa_tl + { + \msg_warning:nnn {tagpdf} {mc-label-unknown} { #1 } + } + { + \__uftag_mc_handle_stash:o { \l_tmpa_tl } + } + } + + + +\endinput |