[Tex/LaTex] Biblatex authoryear-ibid: Specific Changes in Bibliography

Question

Firstly, thank you tex.stackexchange for being the best TeX-Reference on the web. I have been using the archives for months now and could always find answers to my questions.

But now I am stuck:

I'm using biblatex with the authoryear-ibid style. I need some specific changes in my bibliography.

At the moment an @incollection-entry prints like this:

Einstein, Albert (1929). »Using LaTeX«. In: The Latex User's Guide. Edited by Stephen Hawkins. New York: Publisher, p. 15-40. URL: http:\\en.wikipedia.org.

But I also have to reference the @collection which prints like this:

Hawkins, Stephen, ed. (1929). The Latex User's Guide. New York: Publisher. URL: http:\\en.wikipedia.org.

Now the 1st problem: The fact that the publisher, address and URL are printed in the @incollection-entry makes my bibliography artificially and unnecessarily long.

What I want to have instead would be:

Einstein, Albert (1929). »Using LaTeX«. In: The Latex User's Guide. Edited by Stephen Hawkins, p. 15-40.

2nd Problem: when the editor also was an author in the same @collection everything is printed twice, which also makes the bibliography artificially long. At the moment it prints like this

Hawkins, Stephen, ed. (1929a). The Latex User's Guide. New York: Publisher. URL: http:\\en.wikipedia.org.

— (1929b). »Understanding LaTeX«. In: The Latex User's Guide. Edited by Stephen Hawkins. New York: Publisher, p. 1-15. URL: http:\\en.wikipedia.org.

But what I would prefer is that it prints something like this instead:

Hawkins, Stephen, ed. (1929a). The Latex User's Guide. New York: Publisher. URL: http:\\en.wikipedia.org.

— (1929b). »Understanding LaTeX«. Edited by same in: The Latex User's Guide, p. 1-15.

(In German it would be:)

Hawkins, Stephens (1929b). »Understanding LaTeX«. In ders.: The Latex User's Guide, S. 1-15.

How can I make that happen?

Thank you very much

EDIT:

Mininmal Working Example (compiled with xelatex & biber)

\documentclass[12pt,a4paper,oneside]{memoir}

\usepackage[ngerman]{babel}
\usepackage[german=guillemets]{csquotes}

\usepackage[%
            style=authoryear-ibid,
            backend=biber,
            backref=true,
            backrefstyle=none,
            doi=false,
            isbn=false,
            maxcitenames=2,
            maxbibnames=2,
            ]{biblatex}
            
\usepackage{filecontents}
\begin{filecontents}{\jobname.bib}
@collection{hawkins.1923,
    editor  = "Hawkins, Stephen",
    title   = "The Latex User's Guide",
    year    = "1923",
    publisher = "Publisher",
    address = "New York",
    url = "en.wikipedia.org",
}
@incollection{hawkins.1923b,
    author = "Hawkins, Stephen",
    title = "Understanding LaTeX",
    crossref = "hawkins.1923",
    pages = "1-15",
}

@incollection{einstein.1923,
    author = "Einstein, Albert",
    title = "Using LaTeX",
    crossref = "hawkins.1923",
    pages = "16-45",
}
\end{filecontents}

\bibliography{\jobname} 

\begin{document}

\nocite{*}

\printbibliography

\end{document}

Answer 1

Much of this problem can be solved by altering the inheritance of fields from the cross-referenced @collection entry to its children @incollection entries. Note that the default inheritance (described in the appendix of the biblatex manual) can be changed only with biber.

The rest can be handled by tracking the editor names between bibliography items. Here this is done by re-purposing \indexnames and comparing the hash field.

\documentclass{article}
\usepackage[american]{babel}
%\usepackage[german]{babel}
\usepackage{csquotes}
\usepackage[backend=biber,style=authoryear-ibid]{biblatex}
\usepackage{xpatch}

% just for demo
\ExecuteBibliographyOptions{abbreviate=false}

\NewBibliographyString{same}
\DefineBibliographyStrings{american}{same = {same}}
\DefineBibliographyStrings{german}{same = {ders}}

% @incollection gets editor not publisher, address, url from @collection
\DeclareDataInheritance{collection}{incollection}{
  \inherit{editor}{editor}
  \noinherit{publisher}
  \noinherit{location}
  \noinherit{url}
}

% collect editor name hash
\newcommand*{\editorhash}{}
\newcommand*{\lasteditorhash}{}
\DeclareIndexNameFormat{gethash}{\xappto{\editorhash}{\thefield{hash},}}

% replace recurrent editor list with same string
\AtEveryBibitem{%
  \let\lasteditorhash\editorhash
  \renewcommand*{\editorhash}{}%
  \indexnames[gethash]{editor}%
  \ifdefstrequal{\lasteditorhash}{\editorhash}
    {\xapptobibmacro{byeditor+othersstrg}
       {\setunit{\addspace}\bibstring{same}\clearname{editor}}{}{}}
    {}}

\usepackage{filecontents}
\begin{filecontents}{\jobname.bib}
@Collection{hawkins:ed,
  editor       = {Hawkins, Stephen},
  title        = {The Latex User's Guide},
  year         = 1923,
  publisher    = {Publisher},
  url          = {en.wikipedia.org},
  address      = {New York},
}
@InCollection{hawkins,
  author       = {Hawkins, Stephen},
  title        = {Understanding LaTeX},
  pages        = {1-15},
  crossref     = {hawkins:ed},
}
@InCollection{einstein,
  author       = {Einstein, Albert},
  title        = {Using LaTeX},
  pages        = {16-45},
  crossref     = {hawkins:ed},
}
\end{filecontents}
\bibliography{\jobname,biblatex-examples} 

\begin{document}
\nocite{hawkins:ed,hawkins,einstein,nietzsche:ksa,nietzsche:ksa1}
\printbibliography
\end{document}

Note that I didn't bother to reverse the "In..." and "Edited by..." fragments when the editor is recurrent, but you can do so by hooking code into the in: bibliography macro.