I customized the numeric style of biblatex, in order to reduce the
\newblock commands for entry types of inproceedings. The next step is that long titles of inproceedings, which create a second line, should be indented, so that the second line starts aligned with the start of the title in the first line. The indentation is necessary (I think), because of the "In:" label in the first line.
So on the one hand I need to know the length of the "In:" label and on the other hand want to indent the second and following lines by this length.
Here is what I have:
And what I want:
Edit: I forgot to mention, that there are several different labels like "In:". For example "doi:" and "URL:". Furthermore, not all blocks, which have a second line should be indented. Instead only special chosen ones should. Sorry, that I forgot that.