ScreenSaver: Delay footer/header repaint if screensaver_delay is enabled (#7334)

Fix #7327

frontend/apps/reader/modules/readercoptlistener.lua

@@ -116,7 +116,25 @@ ReaderCoptListener.onSetStatusLine = ReaderCoptListener.rescheduleHeaderRefreshI
 ReaderCoptListener.onSetViewMode = ReaderCoptListener.rescheduleHeaderRefreshIfNeeded
     -- ReaderView:onSetViewMode(), which sets view.view_mode, is called before
     -- ReaderCoptListener.onSetViewMode, so we'll get the updated value
-ReaderCoptListener.onResume = ReaderCoptListener.rescheduleHeaderRefreshIfNeeded
+function ReaderCoptListener:onResume()
+    -- Don't repaint the header until OutOfScreenSaver if screensaver_delay is enabled...
+    local screensaver_delay = G_reader_settings:readSetting("screensaver_delay")
+    if screensaver_delay and screensaver_delay ~= "disable" then
+        self._delayed_screensaver = true
+        return
+    end
+
+    ReaderCoptListener:rescheduleHeaderRefreshIfNeeded()
+end
+
+function ReaderCoptListener:onOutOfScreenSaver()
+    if not self._delayed_screensaver then
+        return
+    end
+
+    self._delayed_screensaver = nil
+    ReaderCoptListener:rescheduleHeaderRefreshIfNeeded()
+end
 
 -- Unschedule on these events
 ReaderCoptListener.onCloseDocument = ReaderCoptListener.unscheduleHeaderRefresh

frontend/apps/reader/modules/readerfooter.lua

@@ -2177,6 +2177,24 @@ function ReaderFooter:refreshFooter(refresh, signal)
 end
 
 function ReaderFooter:onResume()
+    -- Don't repaint the footer until OutOfScreenSaver if screensaver_delay is enabled...
+    local screensaver_delay = G_reader_settings:readSetting("screensaver_delay")
+    if screensaver_delay and screensaver_delay ~= "disable" then
+        self._delayed_screensaver = true
+        return
+    end
+
+    -- Force a footer repaint on resume if it was visible
+    self:onUpdateFooter(self.view.footer_visible)
+    self:rescheduleFooterAutoRefreshIfNeeded()
+end
+
+function ReaderFooter:onOutOfScreenSaver()
+    if not self._delayed_screensaver then
+        return
+    end
+
+    self._delayed_screensaver = nil
     -- Force a footer repaint on resume if it was visible
     self:onUpdateFooter(self.view.footer_visible)
     self:rescheduleFooterAutoRefreshIfNeeded()

frontend/ui/elements/screensaver_menu.lua

@@ -208,7 +208,7 @@ return {
                 }
             },
             {
-                text = _("Delay when exit from screensaver"),
+                text = _("Keep the screensaver on screen after wakeup"),
                 sub_item_table = {
                     {
                         text = _("Disable"),
@@ -224,7 +224,7 @@ return {
                         end
                     },
                     {
-                        text = _("1 second"),
+                        text = _("For 1 second"),
                         checked_func = function()
                             if screensaverDelay() == "1" then
                                 return true
@@ -237,7 +237,7 @@ return {
                         end
                     },
                     {
-                        text = _("3 seconds"),
+                        text = _("For 3 seconds"),
                         checked_func = function()
                             if screensaverDelay() == "3" then
                                 return true
@@ -250,7 +250,7 @@ return {
                         end
                     },
                     {
-                        text = _("5 seconds"),
+                        text = _("For 5 seconds"),
                         checked_func = function()
                             if screensaverDelay() == "5" then
                                 return true
@@ -263,7 +263,7 @@ return {
                         end
                     },
                     {
-                        text = _("Tap to exit screensaver"),
+                        text = _("Until a tap"),
                         checked_func = function()
                             if screensaverDelay() == "tap" then
                                 return true

frontend/ui/widget/screensaverwidget.lua

@@ -1,4 +1,5 @@
 local Device = require("device")
+local Event = require("ui/event")
 local Geom = require("ui/geometry")
 local GestureRange = require("ui/gesturerange")
 local FrameContainer = require("ui/widget/container/framecontainer")
@@ -73,6 +74,8 @@ end
 
 function ScreenSaverWidget:onClose()
     UIManager:close(self, "full")
+    -- Will come after the Resume event (how much later depends on screensaver_delay).
+    UIManager:broadcastEvent(Event:new("OutOfScreenSaver"))
     return true
 end