[UX] Gesture manager: add action - go to (#4690)

Cf. <https://github.com/koreader/koreader/issues/4687>.

frontend/apps/reader/modules/readergesture.lua

@@ -23,6 +23,7 @@ local action_strings = {
     page_jmp_back_1 = _("Previous page"),
     page_jmp_fwd_10 = _("Forward 10 pages"),
     page_jmp_fwd_1 = _("Next page"),
+    go_to = _("Go to"),
     skim = _("Skim"),
     back = _("Back"),
     previous_location = _("Back to previous location"),
@@ -101,6 +102,7 @@ function ReaderGesture:init()
         multiswipe_north_east = "toc",
         multiswipe_north_west = self.ges_mode == "gesture_fm" and "folder_up" or "bookmarks",
         multiswipe_east_north = "history",
+        multiswipe_east_south = "go_to",
         multiswipe_south_north = "skim",
         multiswipe_south_east = "toggle_reflow",
         multiswipe_south_west = "show_frontlight_dialog",
@@ -245,6 +247,7 @@ function ReaderGesture:buildMenu(ges, default)
         {"page_jmp_back_1", not self.is_docless},
         {"page_jmp_fwd_10", not self.is_docless},
         {"page_jmp_fwd_1", not self.is_docless},
+        {"go_to", true},
         {"skim", not self.is_docless},
         {"back", true},
         {"previous_location", not self.is_docless},
@@ -510,6 +513,8 @@ function ReaderGesture:gestureAction(action)
         self:pageUpdate(-10)
     elseif action == "page_jmp_back_1" then
         self:pageUpdate(-1)
+    elseif action == "go_to" then
+        self.ui:handleEvent(Event:new("ShowGotoDialog"))
     elseif action == "skim" then
         self.ui:handleEvent(Event:new("ShowSkimtoDialog"))
     elseif action == "back" then

frontend/ui/widget/keyvaluepage.lua

@@ -353,7 +353,7 @@ function KeyValuePage:init()
     self.page_info_text = Button:new{
         text = "",
         hold_input = {
-            title = _("Input page number"),
+            title = _("Enter page number"),
             type = "number",
             hint_func = function()
                 return "(" .. "1 - " .. self.pages .. ")"

frontend/ui/widget/menu.lua

@@ -643,7 +643,7 @@ function Menu:init()
     }
 
     if self.goto_letter then
-        title_goto = _("Input page number or letter")
+        title_goto = _("Enter page number or letter")
         type_goto = "string"
         hint_func = function()
             return string.format("(1 - %s) or (a - z)", self.page_num)
@@ -666,7 +666,7 @@ function Menu:init()
             end,
         })
     else
-        title_goto = _("Input page number")
+        title_goto = _("Enter page number")
         type_goto = "number"
         hint_func = function()
             return string.format("(1 - %s)", self.page_num)
@@ -1032,6 +1032,12 @@ function Menu:onSelectByShortCut(_, keyevent)
     return true
 end
 
+function Menu:onShowGotoDialog()
+    if self.page_info_text and self.page_info_text.hold_input then
+        self.page_info_text:onInput(self.page_info_text.hold_input)
+    end
+end
+
 function Menu:onWrapFirst()
     if self.page > 1 then
         self.page = self.page - 1