Migrate kwin animation speed to kdeglobals

Test Plan:
Tested output piping test lines into the script with different settings
Removed from my kdeglobals
Invoked script. New value appeared

(note that if you manually test multiple times locally you have to
cleanup the $version info from
both kdeglobals and kwinrc or the migration will be skipped)

Reviewers: zzag

Reviewed By: zzag

Subscribers: zzag, kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D24084

kconf_update/CMakeLists.txt

@@ -2,3 +2,5 @@ install(FILES kwin.upd
         DESTINATION ${KDE_INSTALL_KCONFUPDATEDIR})
 install(PROGRAMS kwin-5.16-auto-bordersize.sh
         DESTINATION ${KDE_INSTALL_KCONFUPDATEDIR})
+install(PROGRAMS kwin-5.18-move-animspeed.py
+        DESTINATION ${KDE_INSTALL_KCONFUPDATEDIR})

kconf_update/kwin-5.18-move-animspeed.py

@@ -0,0 +1,14 @@
+#!/bin/env python
+
+import fileinput
+
+speed_map = [0, 0.25, 0.5, 1, 2, 4, 20]
+
+for line in fileinput.input():
+    if not line.startswith("AnimationSpeed="):
+        continue
+    speed = int(line[len("AnimationSpeed="):])
+    if speed < 0 or speed >= len(speed_map):
+        continue
+    print("AnimationDurationFactor=%f" % speed_map[speed])
+    print("# DELETE AnimationSpeed") #special kconf syntax to remove the old key

kconf_update/kwin.upd

@@ -31,3 +31,9 @@ Id=auto-bordersize
 File=kwinrc
 Group=org.kde.kdecoration2
 Script=kwin-5.16-auto-bordersize.sh,sh
+
+# Move AnimationSpeed to kdeglobals as AnimationDurationFactor converting to a useful value
+Id=animation-speed
+File=kwinrc,kdeglobals
+Group=Compositing,KDE
+Script=kwin-5.18-move-animspeed.py,python