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authorNorbert Preining <norbert@preining.info>2021-12-22 03:01:35 +0000
committerNorbert Preining <norbert@preining.info>2021-12-22 03:01:35 +0000
commit9105ca38c03b7a88ed0c306472d9560cc5f206bd (patch)
treec3fb0be880a7aa14f36f5d05a0137c9ee61d9603 /support/TeX4ht/source/tex4ht-4ht.tex
parent3bffd8b7dfcee8333bb2841ea194a0daa26af8cd (diff)
CTAN sync 202112220301
Diffstat (limited to 'support/TeX4ht/source/tex4ht-4ht.tex')
-rw-r--r--support/TeX4ht/source/tex4ht-4ht.tex59
1 files changed, 57 insertions, 2 deletions
diff --git a/support/TeX4ht/source/tex4ht-4ht.tex b/support/TeX4ht/source/tex4ht-4ht.tex
index 1ba356792b..9acf761cb5 100644
--- a/support/TeX4ht/source/tex4ht-4ht.tex
+++ b/support/TeX4ht/source/tex4ht-4ht.tex
@@ -1,4 +1,4 @@
-% $Id: tex4ht-4ht.tex 1035 2021-12-19 22:26:51Z michal_h21 $
+% $Id: tex4ht-4ht.tex 1037 2021-12-20 22:36:14Z michal_h21 $
% tex tex4ht-4ht or ht tex tex4ht-4ht
%
% Copyright 2009-2021 TeX Users Group
@@ -1909,6 +1909,7 @@ and \''\Tg'.
|<shared config biblatex|>
|<biblatex-crosslinking|>
|<biblatex AtEndPreamble|>
+ |<biblatex backlinks|>
\Hinput{biblatex}
\endinput
>>> \AddFile{6}{biblatex}
@@ -2753,6 +2754,60 @@ they caused compilation error when the AUX file is loaded.
{\egroup\EndP\HCode{</dt><dd\Hnewline class="description">}}
>>>
+Fix backlink support in BibLaTeX
+
+\<biblatex backlinks\><<<
+\pend:defI\blx@backref{%
+ % prevent duplicate backlink on the same page
+ \ifcsdef{bk##1\thepage}{}{%
+ % insert link to the page
+ \html:addr\Link-{}{|<haddr prefix|>\last:haddr}\EndLink%
+ % save link to the .xref file
+ \Tag{)Q##1\thepage}{|<haddr prefix|>\last:haddr}%
+ % we need to save the link destination in .xref file
+ % too, otherwise \Link command would issue warning
+ \Tag{)Q|<haddr prefix|>\last:haddr}{\FileNumber}%
+ }%
+ % declare this backlink destination as used, so we don't
+ % declare another one with the same name
+ \expandafter\gdef\csname bk##1\thepage\endcsname{}%
+}
+
+% version of \hyperlink that links back to saved link in citation
+% on the given DVI page
+\def\bbx:hyperlink#1#2{
+ % first argument is destination used by Hyperref, second is page number
+ % test if we saved link to the current bibitem and page
+ \ifTag{)Q\abx@field@entrykey#2}{%
+ \Link{\LikeRef{)Q\abx@field@entrykey#2}}{}#2\EndLink%
+ }%
+ {#2}% print just page number if there is no saved link
+ }
+
+% we need to redefine pageref format, which is used for printing of
+% back link page numbers. custom \hyperlink command is used
+\DeclareListFormat{pageref}{%
+ % we redefine \hyperlink command to link page numbers in backreferences
+ % back to the citations on the given pages
+ \let\orig:hyperlink\hyperlink%
+ \let\hyperlink\bbx:hyperlink%
+ \ifnumless{\abx@pagerefstyle}{0}
+ {\usebibmacro{list:plain}%
+ \ifhyperref
+ {\hyperlink{page.#1}{#1}}
+ {#1}}
+ {\ifnumequal{\value{listcount}}{1}
+ {\usebibmacro{pageref:init}}
+ {}%
+ \usebibmacro{pageref:comp}{#1}%
+ \ifnumequal{\value{listcount}}{\value{liststop}}
+ {\usebibmacro{pageref:dump}}
+ {}}
+ \let\hyperlink\orig:hyperlink%
+}
+
+>>>
+
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\SubSection{backref.4ht}
@@ -2777,7 +2832,7 @@ they caused compilation error when the AUX file is loaded.
% we need to save the link destination in .xref file
% too, otherwise \Link command would issue warning
\Tag{)Q|<haddr prefix|>\last:haddr}{\FileNumber}%
- \fi
+ \fi%
% declare this backlink destination as used, so we don't
% declare another one with the same name
\expandafter\def\csname bk##1\thepage\endcsname{}%