tdf#91727 - Unwind non-dispatch of idle handlers.

This clobbers the functionality from commit:

06d731428ef6cf93c7333e8228bfb6088853b52f

make idle timers actually activate only when idle

Since now all rendering and re-sizing is done in idle handlers it
does effectively the opposite of what was intended. A better solution
would allow special-casing the processing of just rendering,
re-sizing and window management to spin for eg. progress bar
rendering.

Also add helpful debugging labels to the idle & timeouts.

Also cleanup the Idle vs. Scheduler handling.

Also ensure that starting an Idle triggers a mainloop wakeup.

Also add a unit test.

Change-Id: Ifb0756714378fdb790be599b93c7a3ac1f9209e6

1 files changed, 3 insertions, 1 deletions

diff --git a/include/tools/time.hxx b/include/tools/time.hxx
index 2b950b860ee9..e25b2de73f53 100644
--- a/include/tools/time.hxx
+++ b/include/tools/time.hxx
@@ -123,7 +123,9 @@ public:
                     { return (nTime <= rTime.nTime); }
 
     static Time     GetUTCOffset();
-    static sal_uInt64 GetSystemTicks();       // Elapsed time
+
+    /// Elapsed time since epoch in milliseconds
+    static sal_uInt64 GetSystemTicks();
 
     void            ConvertToUTC()       { *this -= Time::GetUTCOffset(); }
     void            ConvertToLocalTime() { *this += Time::GetUTCOffset(); }