[feat, UX] Ignore hold corners (#5404)

Closes <https://github.com/koreader/koreader/issues/5401>.

frontend/apps/reader/modules/readergesture.lua

@@ -69,6 +69,7 @@ local action_strings = {
     decrease_frontlight = _("Decrease frontlight brightness"),
     increase_frontlight_warmth = _("Increase frontlight warmth"),
     decrease_frontlight_warmth = _("Decrease frontlight warmth"),
+    toggle_hold_corners = _("Toggle hold corners"),
     toggle_gsensor = _("Toggle accelerometer"),
     toggle_rotation = _("Toggle rotation"),
 
@@ -156,6 +157,7 @@ These advanced gestures consist of either straight swipes or diagonal swipes. To
 
 function ReaderGesture:init()
     if not Device:isTouchDevice() then return end
+    self.ignore_hold_corners = G_reader_settings:readSetting("ignore_hold_corners")
     self.multiswipes_enabled = G_reader_settings:readSetting("multiswipes_enabled")
     self.is_docless = self.ui == nil or self.ui.document == nil
     self.ges_mode = self.is_docless and "gesture_fm" or "gesture_reader"
@@ -707,6 +709,7 @@ function ReaderGesture:buildMenu(ges, default)
         {"increase_frontlight_warmth", Device:hasNaturalLight()},
         {"decrease_frontlight_warmth", Device:hasNaturalLight(), true},
 
+        {"toggle_hold_corners", true},
         {"toggle_gsensor", Device:canToggleGSensor()},
         {"toggle_rotation", not self.is_docless, true},
 
@@ -1185,6 +1188,7 @@ function ReaderGesture:registerGesture(ges, action, ges_type, zone, overrides, d
                                 self.multiswipes_enabled = false
                             end,
                         })
+                        return
                     else
                         return self:multiswipeAction(gest.multiswipe_directions, gest)
                     end
@@ -1202,7 +1206,8 @@ local function lightFrontlight()
 end
 
 function ReaderGesture:gestureAction(action, ges)
-    if action == "ignore" then
+    if action == "ignore"
+       or (ges.ges == "hold" and self.ignore_hold_corners) then
         return
     elseif action == "reading_progress" and ReaderGesture.getReaderProgress then
         UIManager:show(ReaderGesture.getReaderProgress())
@@ -1363,6 +1368,8 @@ function ReaderGesture:gestureAction(action, ges)
         end
         Device:getPowerDevice():toggleFrontlight()
         self:onShowFLOnOff()
+    elseif action == "toggle_hold_corners" then
+        self:onIgnoreHoldCorners()
     elseif action == "toggle_gsensor" then
         G_reader_settings:flipNilOrFalse("input_ignore_gsensor")
         Device:toggleGSensor(not G_reader_settings:isTrue("input_ignore_gsensor"))
@@ -1518,6 +1525,16 @@ function ReaderGesture:pageUpdate(page)
 
 end
 
+function ReaderGesture:onIgnoreHoldCorners(ignore_hold_corners)
+    if ignore_hold_corners == nil then
+        G_reader_settings:flipNilOrFalse("ignore_hold_corners")
+    else
+        G_reader_settings:saveSetting("ignore_hold_corners", ignore_hold_corners)
+    end
+    self.ignore_hold_corners = G_reader_settings:isTrue("ignore_hold_corners")
+    return true
+end
+
 function ReaderGesture:onShowFLOnOff()
     local powerd = Device:getPowerDevice()
     local new_text

frontend/ui/elements/common_settings_menu_table.lua

@@ -1,5 +1,6 @@
 local DateWidget = require("ui/widget/datewidget")
 local Device = require("device")
+local Event = require("ui/event")
 local InfoMessage = require("ui/widget/infomessage")
 local Language = require("ui/language")
 local NetworkMgr = require("ui/network/manager")
@@ -171,6 +172,15 @@ common_settings.screen_dpi = require("ui/elements/screen_dpi_menu_table")
 common_settings.screen_eink_opt = require("ui/elements/screen_eink_opt_menu_table")
 common_settings.menu_activate = require("ui/elements/menu_activate")
 common_settings.screen_disable_double_tab = require("ui/elements/screen_disable_double_tap_table")
+common_settings.ignore_hold_corners = {
+    text = _("Ignore hold on corners"),
+    checked_func = function()
+        return G_reader_settings:isTrue("ignore_hold_corners")
+    end,
+    callback = function()
+        UIManager:broadcastEvent(Event:new("IgnoreHoldCorners"))
+    end,
+}
 
 if Device:canToggleGSensor() then
     common_settings.screen_toggle_gsensor = require("ui/elements/screen_toggle_gsensor")

frontend/ui/elements/filemanager_menu_order.lua

@@ -83,6 +83,7 @@ local order = {
         "gesture_intervals",
         "----------------------------",
         "menu_activate",
+        "ignore_hold_corners",
         "screen_disable_double_tab",
     },
     tools = {

frontend/ui/elements/reader_menu_order.lua

@@ -105,6 +105,7 @@ local order = {
         "follow_links",
         "----------------------------",
         "menu_activate",
+        "ignore_hold_corners",
         "screen_disable_double_tab",
     },
     tools = {