[Bug 41772] New: TP Logger: Introduce TplEventWalker

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=41772

           Summary: TP Logger: Introduce TplEventWalker
           Product: Telepathy
           Version: git master
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: enhancement
          Priority: medium
         Component: logger
        AssignedTo: telepathy-bugs at lists.freedesktop.org
        ReportedBy: nicolas.dufresne at collabora.co.uk
         QAContact: telepathy-bugs at lists.freedesktop.org


A concept that has been popularized in instant messaging window is the support
for infinite scroll back. Currently the logger API is miss-adapted for this
task. To solve this solution I'm proposing a new class, TplEventWalker, that
would allow scrolling, thus loading more log as wanted.

Requirement:
- Allow walking from a specific date and load older and newer events as needed
(log view)
- Allow walking a search from a specific date (log search)
- Allow walking around a specific event (search result context)

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