Idemtracker between article or inbook and book with cite command in biblatex

Question

I have a problem when I cite an article following a book, it seems that the idemtracker doesn't work for documentclass as article or inbook.

Example : biblioessai.tex :

\documentclass[a4paper,12pt]{book}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage[style=verbose-trad2,citestyle=verbose-trad2,backend=biber,uniquename=false,citepages=suppress]{biblatex}
\usepackage{csquotes}
\usepackage[french]{babel}
\addbibresource{essai.bib}

\begin{document}
\cite{article1}

\cite{article2}

\cite{book}
\end{document}

essai.bib :

@article{article1,
author = "My Author",
journal = "A Journal",
title = "Titletitle",
date = "2005",
pages = "49-62",
volume = "12",
number = "1-2"
}

@book{book,
address = "Address",
author = "My Author",
origyear = "1994",
pagetotal = "349",
publisher = "A publisher",
title = "An other title",
year = "2004"
}

@article{article2,
author = "My Author",
journal = "A Journal",
title = "An other article",
date = "2008",
pages = "51-63",
volume = "1",
number = "15"
}

After compilation i have :

My Author. Titletitle. Dans : A Journal 12.1-2 (2005)
My Author. An other article. Dans : A Journal 1.15 (2008)
My Author. An other title. Address : A publisher, 2004

And what I would like :

My Author. Titletitle. Dans : A Journal 12.1-2 (2005)
Idem. An other article. Dans : A Journal 1.15 (2008)
Idem. An other title. Address : A publisher, 2004

Any idea? Thanks

Answer 1

The "problem" here is that verbose-trad2 always prints a fullcite if a cite is seen for the very first time. After that idem/ibidem etc. will work.

See the definition of bibmacro cite in verbose-trad2.cbx.

So if you repeat in your code

\cite{article1}
\cite{article2}
\cite{book}

the idem will show up.

---

EDIT: Since you need the idem to show up fullcites, too, it's maybe best to modify the author macro itself:

Add the following lines to your preamble:

\usepackage{xpatch}
\xpatchbibmacro{author}{\printnames{author}}{\ifthenelse{\ifciteidem\AND\NOT\boolean{cbx:noidem}}%
{\usebibmacro{cite:idem}}{\printnames{author}}}{}{}

This will exchange the \printnames{author} command from authortitle.bbx (which is used by verbose-trad2) with a test if it's a idem or not and use the appropriate macro.

I don't know if it's the best solution, but for your MWE it works. Maybe you have also to exchange the editor macro and others as well.