feat: support screenshot in filemanager

frontend/apps/reader/modules/readerscreenshot.lua

@@ -1,61 +0,0 @@
-local InputContainer = require("ui/widget/container/inputcontainer")
-local InfoMessage = require("ui/widget/infomessage")
-local GestureRange = require("ui/gesturerange")
-local DataStorage = require("datastorage")
-local UIManager = require("ui/uimanager")
-local Device = require("device")
-local Screen = require("device").screen
-local DEBUG = require("dbg")
-local T = require("ffi/util").template
-local _ = require("gettext")
-
-local screenshots_dir = DataStorage:getDataDir() .. "/screenshots/"
-
-local ReaderScreenshot = InputContainer:new{
-    datetime_name = screenshots_dir .. "Screenshot_%Y-%b-%d_%H%M%S.png",
-}
-
-function ReaderScreenshot:init()
-    local diagonal = math.sqrt(
-        math.pow(Screen:getWidth(), 2) +
-        math.pow(Screen:getHeight(), 2)
-    )
-    self.ges_events = {
-        TapDiagonal = {
-            GestureRange:new{
-                ges = "two_finger_tap",
-                scale = {diagonal - Screen:scaleBySize(200), diagonal},
-                rate = 1.0,
-            }
-        },
-        SwipeDiagonal = {
-            GestureRange:new{
-                ges = "swipe",
-                scale = {diagonal - Screen:scaleBySize(200), diagonal},
-                rate = 1.0,
-            }
-        },
-    }
-end
-
-function ReaderScreenshot:onScreenshot(filename)
-    local screenshot_name = filename or os.date(self.datetime_name)
-    UIManager:show(InfoMessage:new{
-        text = T( _("Saving screenshot to %1."), screenshot_name),
-        timeout = 3,
-    })
-    Screen:shot(screenshot_name)
-    -- trigger full refresh
-    UIManager:setDirty(nil, "full")
-    return true
-end
-
-function ReaderScreenshot:onTapDiagonal()
-    return self:onScreenshot()
-end
-
-function ReaderScreenshot:onSwipeDiagonal()
-    return self:onScreenshot()
-end
-
-return ReaderScreenshot