space between consecutive references in text

Question

Based on code from biblatex-apa, I have created a \fullcitebib command to enter complete references in the text. I can use multiple commands of this type to create lists of complete references without having to follow the ordering of citations in the document. This leads to a lot of white space between references, presumably because it is processing the references as items in separate lists. Is it possible to avoid having this space between consecutive \fullcitebib commands?

EDIT: Ah, I can avoid the vertical space issue with a different definition of \fullcitebib which doesn't use list items, which gets closer to what I want. There is still the problem that the references are indented (which I don't want) as well as having hanging indentation (which I do want). Any suggestions as to how to get the references against the left margin, without a manual \noindent? Sample code and output below.

\documentclass{article}
\usepackage[backend=biber,%
            style=authoryear,%
            ]{biblatex}

\begin{filecontents}{bib.bib}
@book{tras1996,
    Address = {London},
    Author = {R. L. Trask},
    Publisher = {Routledge},
    Title = {A dictionary of phonetics and phonology},
    Year = {1996}}
@book{crys2010,
    Address = {Cambridge},
    Author = {David Crystal},
    Edition = {3},
    Publisher = {Cambridge University Press},
    Title = {The {C}ambridge Encyclopaedia of Language},
    Year = {2010}}
@book{matt2005,
    Address = {Oxford},
    Author = {Matthews, P.H.},
    Publisher = {Oxford University Press},
    Title = {The Concise {O}xford Dictionary of Linguistics},
    Year = {2005}}
\end{filecontents}
\addbibresource{bib.bib} 

\DeclareCiteCommand{\fullcitebib}
  {}
  {\hangindent=3em\usedriver{}{\thefield{entrytype}}\finentry\par}
  {}
  {\usebibmacro{postnote}
   }

\begin{document}

\fullcitebib{tras1996}\fullcitebib{crys2010}\fullcitebib{matt2005}

The references above should have a hanging indent, as they do now, but be against
the left margin, like the references list below.

\printbibliography
\end{document}

Answer 1

To answer your problem

To insert a small subset of references, you can simply use refsection and get a good formatting without any hacks.

\documentclass{article}
\usepackage[backend=biber, style=authoryear]{biblatex}

\begin{filecontents}{bib.bib}
@book{tras1996,
Address = {London},
Author = {R. L. Trask},
Publisher = {Routledge},
    Title = {A dictionary of phonetics and phonology},
Year = {1996}}
    @book{crys2010,
    Address = {Cambridge},
    Author = {David Crystal},
Edition = {3},
Publisher = {Cambridge University Press},
Title = {The {C}ambridge Encyclopaedia of Language},
Year = {2010}}
@book{matt2005,
Address = {Oxford},
Author = {Matthews, P.H.},
Publisher = {Oxford University Press},
Title = {The Concise {O}xford Dictionary of Linguistics},
Year = {2005}}
\end{filecontents}

\addbibresource{bib.bib} 

\begin{document}

\begin{refsection}
        \newrefcontext[sorting=none]
    \nocite{tras1996,crys2010}
    \printbibliography[heading=none]
\end{refsection}


\newrefcontext[sorting=nyt]
\nocite{tras1996,crys2010,matt2005}
The references above should have a hanging indent, as they do now, but be against
the left margin, like the references list below.

\printbibliography
\end{document}

To answer your question:

The first line of your custom reference gets indented, as it is the first line of a paragraph. This can be reverted by a liitle hack: \hskip-\parindent

\documentclass{article}
\usepackage[backend=biber,%
style=authoryear,%
]{biblatex}

\begin{filecontents}{bib.bib}
@book{tras1996,
Address = {London},
Author = {R. L. Trask},
Publisher = {Routledge},
Title = {A dictionary of phonetics and phonology},
Year = {1996}}
@book{crys2010,
Address = {Cambridge},
Author = {David Crystal},
Edition = {3},
Publisher = {Cambridge University Press},
Title = {The {C}ambridge Encyclopaedia of Language},
Year = {2010}}
@book{matt2005,
Address = {Oxford},
Author = {Matthews, P.H.},
Publisher = {Oxford University Press},
Title = {The Concise {O}xford Dictionary of Linguistics},
Year = {2005}}
\end{filecontents}
\addbibresource{bib.bib} 

\DeclareCiteCommand{\fullcitebib}
{}
{\hskip-\parindent\hangindent=\parindent\usedriver{}{\thefield{entrytype}}\finentry\par}
{}
{\usebibmacro{postnote}
}

\begin{document}

\fullcitebib{tras1996}\fullcitebib{crys2010}\fullcitebib{matt2005}

The references above should have a hanging indent, as they do now, but be against
the left margin, like the references list below.

\printbibliography
\end{document}

Answer 2

I believe you should have stuck with the original definition based on biblatex-apa.

\DeclareCiteCommand{\fullcitebib}
  {\usebibmacro{prenote}%
   \renewcommand*{\finalnamedelim}{%
     \finalandcomma\addspace\bibstring{and}\space}
   \list{}
     {\setlength{\leftmargin}{\bibhang}%
      \setlength{\itemindent}{-\leftmargin}%
      \setlength{\itemsep}{\bibitemsep}%
      \setlength{\parsep}{\bibparsep}}%
   \item}
  {\usedriver
     {}
     {\thefield{entrytype}}\finentry}
  {\item}
  {\endlist
   \usebibmacro{postnote}}

Instead of

\fullcitebib{tras1996}\fullcitebib{crys2010}\fullcitebib{matt2005}

which starts a new list for every entry (as you rightly noted), you should have used

\fullcitebib{tras1996,crys2010,matt2005}

where all three entries are in the same list

MWE

\documentclass{article}
\usepackage[backend=biber,%
            style=authoryear,%
            ]{biblatex}

\addbibresource{biblatex-examples.bib}

\DeclareCiteCommand{\fullcitebib}
  {\usebibmacro{prenote}%
   \renewcommand*{\finalnamedelim}{%
     \finalandcomma\addspace\bibstring{and}\space}
   \list{}
     {\setlength{\leftmargin}{\bibhang}%
      \setlength{\itemindent}{-\leftmargin}%
      \setlength{\itemsep}{\bibitemsep}%
      \setlength{\parsep}{\bibparsep}}%
   \item}
  {\usedriver
     {}
     {\thefield{entrytype}}\finentry}
  {\item}
  {\endlist
   \usebibmacro{postnote}}

\begin{document}

\fullcitebib{sigfridsson}\fullcitebib{worman}\fullcitebib{cicero}

\fullcitebib{sigfridsson,worman,cicero}

\printbibliography
\end{document}