[Tickets #197] have annotate mode link to line's prior version

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Ticket URL: http://bugs.horde.org/ticket/?id=197
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 Ticket             | 197
 Updated By         | oyasumi+chora at gmail.com
 Summary            | have annotate mode link to line's prior version
 Queue              | Chora
 Version            | HEAD
 State              | Accepted
 Priority           | 1. Low
 Type               | Enhancement
 Owners             | 
+New Attachment     | get_diff_chunks.pike
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oyasumi+chora at gmail.com (2006-01-02 17:56) wrote:

I have implemented this feature in another CVS visualizer written in Pike:
Code Librarian. Here is the algorithm for reading diffs produced by cvs
rdiff, picking out from-line in revision r1 and to-line in revision r2 for
every diff chunk between the two revisions. It is used for generating the
line number links in, for instance,
http://pike.ida.liu.se/development/cvs/diff-popup.xml?module=Pike&file=7.7/s
rc/post_modules/GTK2/source/gtkcomboboxentry.pre&from=1.1&to=1.2

The output produced is a mapping with an array of chunk mappings listing
their from/to line numbers and number of diff lines in either revision, and
an array of diff lines, one for each line in the produced unidiff. Each diff
line mapping also lists the corresponding lines in the from/to revisions.