More fine-grained progress measurement

[mortennorby]

The Inspector panel's Activity tab shows an 18x18 grid with an overview of the progress of the download, represented by a color scale from white to dark blue, with an orange flash when a piece is completed.

The information for this display is sampled from from the list of pieces. This means that for a torrent with, e.g., 5000 pieces, the progress is measured on ~6.5% (=18x18/5000) of the total file.

This can lead to inconsistences with the file tab, if a whole sequence of pieces is shown as completed in the graphical representation, while the file view reports some of the files at less than 100%.

Proposal: Provide a more accurate measurement to help users better understand the progress of a download.

Patch: Attached are two patches that calculate the progress more accurately to reach the goal of this proposal.

completion.diff is a patch for libtransmission/completion.c and makes the percent-wise progress measure more accurate.

peer-mgr.diff is a patch for libtransmission/peer-mgr.c and does the same thing for the availability, plus it makes sure that the criteria for completeness is identical between the two views in the Activity tab.

[mortennorby]

A more accurate percent-wise progress measurement.

[mortennorby]

A more accurate availability measurement, matching completion.diff.

[charles]

could you create a single unified diff ("diff -u") of all the changes?

[mortennorby]

Unified diff with all the changes

[charles]

folding this ticket into #2352