[UX] Gesture manager: add action - cycle default highlight action (#4791)

Cf. https://github.com/koreader/koreader/issues/4727

frontend/apps/reader/modules/readergesture.lua

@@ -76,7 +76,7 @@ local action_strings = {
 
     folder_up = _("Folder up"),
     folder_shortcuts = _("Folder shortcuts"),
-
+    toggle_highlight_action = _("Toggle highlight action"),
     wallabag_download = _("Wallabag retrieval"),
 }
 
@@ -358,7 +358,7 @@ function ReaderGesture:buildMenu(ges, default)
         {"zoom_column", not self.is_docless},
         {"zoom_content", not self.is_docless},
         {"zoom_page", not self.is_docless, true},
-
+        {"toggle_highlight_action", not self.is_docless},
         {"wallabag_download", self.ui.wallabag ~= nil},
     }
     local return_menu = {}
@@ -796,6 +796,8 @@ function ReaderGesture:gestureAction(action, ges)
         self.ui:handleEvent(Event:new("SetZoomMode", "page"))
     elseif action == "wallabag_download" then
         self.ui:handleEvent(Event:new("SynchronizeWallabag"))
+    elseif action == "toggle_highlight_action" then
+        self.ui:handleEvent(Event:new("CycleHighlightAction"))
     end
     return true
 end

frontend/apps/reader/modules/readerhighlight.lua

@@ -3,6 +3,7 @@ local ConfirmBox = require("ui/widget/confirmbox")
 local Device = require("device")
 local Event = require("ui/event")
 local InfoMessage = require("ui/widget/infomessage")
+local Notification = require("ui/widget/notification")
 local InputContainer = require("ui/widget/container/inputcontainer")
 local TimeVal = require("ui/timeval")
 local Translator = require("ui/translator")
@@ -843,6 +844,29 @@ function ReaderHighlight:onHoldRelease()
     return true
 end
 
+function ReaderHighlight:onCycleHighlightAction()
+    local next_actions = {
+        highlight = "translate",
+        translate = "wikipedia",
+        wikipedia = nil
+    }
+    local current_action = G_reader_settings:readSetting("default_highlight_action")
+    if not current_action then
+        G_reader_settings:saveSetting("default_highlight_action", "highlight")
+        UIManager:show(Notification:new{
+            text = _("Default highlight action changed to 'highlight'."),
+            timeout = 1,
+        })
+    else
+        local next_action = next_actions[current_action]
+        G_reader_settings:saveSetting("default_highlight_action", next_action)
+        UIManager:show(Notification:new{
+            text = T(_("Default highlight action changed to '%1'."), (next_action or "default")),
+            timeout = 1,
+        })
+    end
+end
+
 function ReaderHighlight:highlightFromHoldPos()
     if self.hold_pos then
         if not self.selected_text then