InfoBarTimeshift: allow seeking on streams

This commit allows seeking on streams when stream is paused.

The buttons 1,3,4,6,7,9 can be used to seek if you already pause stream.
If stream is not paused buttons are working normally by change to channel.

Long press on fast forward / rewind allows seeking by manually entering desired time.

data/keymap.xml

@@ -371,6 +371,15 @@
 		<key id="KEY_PAUSE" mapto="timeshiftStart" flags="m"/>
 		<key id="KEY_STOP" mapto="timeshiftStop" flags="m"/>
 		<key id="KEY_TIME" mapto="timeshiftStart" flags="m"/>
+
+		<key id="KEY_REWIND" mapto="seekBackManual" flags="l"/>
+		<key id="KEY_FASTFORWARD" mapto="seekFwdManual" flags="l"/>
+		<key id="KEY_1" mapto="seekdef:1" flags="m"/>
+		<key id="KEY_3" mapto="seekdef:3" flags="m"/>
+		<key id="KEY_4" mapto="seekdef:4" flags="m"/>
+		<key id="KEY_6" mapto="seekdef:6" flags="m"/>
+		<key id="KEY_7" mapto="seekdef:7" flags="m"/>
+		<key id="KEY_9" mapto="seekdef:9" flags="m"/>
 	</map>
 
 	<map context="InfobarTimeshiftActivateActions">

lib/python/Screens/InfoBarGenerics.py

@@ -1774,13 +1774,21 @@ def __init__(self):
 # note that a timeshift can be enabled ("recording") and
 # activated (currently time-shifting).
 
-class InfoBarTimeshift:
+class InfoBarTimeshift(InfoBarSeek):
 	def __init__(self):
 		self["TimeshiftActions"] = HelpableActionMap(self, "InfobarTimeshiftActions",
 			{
 				"timeshiftStart": (self.startTimeshift, _("Start timeshift")),  # the "yellow key"
-				"timeshiftStop": (self.stopTimeshift, _("Stop timeshift"))      # currently undefined :), probably 'TV'
-			}, prio=1)
+				"timeshiftStop": (self.stopTimeshift, _("Stop timeshift")),      # currently undefined :), probably 'TV'
+				"seekFwdManual": (self.seekFwdManual, _("Seek forward (enter time)")),
+				"seekBackManual": (self.seekBackManual, _("Seek backward (enter time)")),
+				"seekdef:1": (boundFunction(self.seekdef,1), _("Seek")),
+				"seekdef:3": (boundFunction(self.seekdef,3), _("Seek")),
+				"seekdef:4": (boundFunction(self.seekdef,4), _("Seek")),
+				"seekdef:6": (boundFunction(self.seekdef,6), _("Seek")),
+				"seekdef:7": (boundFunction(self.seekdef,7), _("Seek")),
+				"seekdef:9": (boundFunction(self.seekdef,9), _("Seek")),
+			}, prio=0)
 		self["TimeshiftActivateActions"] = ActionMap(["InfobarTimeshiftActivateActions"],
 			{
 				"timeshiftActivateEnd": self.activateTimeshiftEnd, # something like "rewind key"
@@ -1806,6 +1814,16 @@ def __init__(self):
 				iPlayableService.evEnd: self.__serviceEnd
 			})
 
+	def seekdef(self, key):
+		if self.seekstate == self.SEEK_STATE_PLAY:
+			return 0 # trade as unhandled action
+		time = (-config.seek.selfdefined_13.value, False, config.seek.selfdefined_13.value,
+			-config.seek.selfdefined_46.value, False, config.seek.selfdefined_46.value,
+			-config.seek.selfdefined_79.value, False, config.seek.selfdefined_79.value)[key-1]
+		self.doSeekRelative(time * 90000)
+		self.pvrStateDialog.show()
+		return 1
+
 	def getTimeshift(self):
 		service = self.session.nav.getCurrentService()
 		return service and service.timeshift()