[feat] GestureManager: Implement action to change highlight style using gesture manager (#4936)

frontend/apps/reader/modules/readergesture.lua

@@ -84,6 +84,7 @@ local action_strings = {
     show_plus_menu = _("Show plus menu"),
     folder_shortcuts = _("Folder shortcuts"),
     cycle_highlight_action = _("Cycle highlight action"),
+    cycle_highlight_style = _("Cycle highlight style"),
     wallabag_download = _("Wallabag retrieval"),
 }
 
@@ -488,6 +489,7 @@ function ReaderGesture:buildMenu(ges, default)
         {"zoom_content", not self.is_docless},
         {"zoom_page", not self.is_docless, true},
         {"cycle_highlight_action", not self.is_docless},
+        {"cycle_highlight_style", not self.is_docless},
         {"wallabag_download", self.ui.wallabag ~= nil},
     }
     local return_menu = {}
@@ -1049,6 +1051,8 @@ function ReaderGesture:gestureAction(action, ges)
         self.ui:handleEvent(Event:new("SynchronizeWallabag"))
     elseif action == "cycle_highlight_action" then
         self.ui:handleEvent(Event:new("CycleHighlightAction"))
+    elseif action == "cycle_highlight_style" then
+        self.ui:handleEvent(Event:new("CycleHighlightStyle"))
     end
     return true
 end

frontend/apps/reader/modules/readerhighlight.lua

@@ -870,6 +870,22 @@ function ReaderHighlight:onCycleHighlightAction()
             timeout = 1,
         })
     end
+    return true
+end
+
+function ReaderHighlight:onCycleHighlightStyle()
+    local next_actions = {
+        lighten = "underscore",
+        underscore = "invert",
+        invert = "lighten"
+    }
+    self.view.highlight.saved_drawer = next_actions[self.view.highlight.saved_drawer]
+    self.ui.doc_settings:saveSetting("highlight_drawer", self.view.highlight.saved_drawer)
+    UIManager:show(Notification:new{
+        text = T(_("Default highlight style changed to '%1'."), self.view.highlight.saved_drawer),
+        timeout = 1,
+    })
+    return true
 end
 
 function ReaderHighlight:highlightFromHoldPos()